Epson EB1985WU – EB1975 –EB1980WU – EB1970W – Air filter maintenance – How to replace the lamp – How to reset the lamp – Projector repair and service

Cleaning the Air Filter and Vents
Clean the projector's air filter or vents if they get dusty, or if you see a message telling you to clean them.
a. Turn off the projector and unplug the power cord.
b. Gently remove the dust using a small vacuum designed for computers or a very soft brush (such as a paintbrush).

c. If dust is difficult to remove or the air filter is damaged, replace the air filter.

Replacing the Air Filter

You need to replace the air filter in the following situations:
# After cleaning the air filter, you see a message telling you to clean or replace it.
# The air filter is torn or damaged.

You can replace the air filter while the projector is mounted to the ceiling or placed on a table.
a. Turn off the projector and unplug the power cord.
b. Slide the air filter cover latch and open the air filter cover

c. Pull the air filter out of the projector.

d. Place the new air filter in the projector as shown and push gently until it clicks into place.

e. Close the air filter cover.

Projector Lamp

The projector monitors the number of hours the lamp is used and displays this information in the projector's menu system.
Replace the lamp as soon as possible when the following occurs:
# The projected image gets darker or quality declines.
# A message appears when you turn on the projector telling you to replace the lamp. (message remains displayed for 30 seconds)

The projector's lamp light is flashing orange.

Replacing the Lamp
You can also replace the lamp while the projector is mounted to the ceiling.

Let the lamp fully cool before replacing it to avoid injury.
# Never disassemble or remodel the lamp. If a modified or disassembled lamp is installed in the projector, it could cause a fire, electric shock, or other damage or injury.

a. Turn off the projector and unplug the power cord.
b. Allow the projector lamp to cool down for at least one hour.When replacing the lamp, there is a possibility that the lamp may be broken. If replacing the lamp of a projector which has been installed on the ceiling, you should always assume that the lamp is cracked, and you should stand to the side of the lamp cover, not underneath it. Remove the lamp cover gently. Be careful when removing the lamp cover as shards of glass may fall out and could cause an injury. If any shards of glass get into your eyes or mouth, contact your local physician immediately.

c. Use the screwdriver included with the replacement lamp to loosen the screw securing the lamp cover.

d. Slide the lamp cover out and lift it off.

e. Loosen the screws securing the lamp to the projector. The screws do not come all the way out.

f. Lift up the lamp handle and carefully pull the lamp out of the projector.

g. Gently insert the new lamp into the projector. If it does not fit easily, make sure it is facing the right way. Press the handle down.

h. Push in the lamp firmly and tighten the screws to secure it.

i. Replace the lamp cover and tighten the screw to secure it.

Reset the lamp timer to zero to monitor the new lamp's usage.

Resetting the Lamp Timer

a. Turn on the projector.
b. Press the [Menu] button on the control panel or remote control.
c. Select the Reset menu and press [Enter].
d. Select Reset Lamp Hours and press [Enter].

e. Select Yes and press [Enter].
f. Press [Menu] or [Esc] to exit the menus.

Harman kardon SUB-TS11 – Test procedure – Class D power amplifier circuit

Test Set Up and Procedure

Equipment needed:
# Function/signal generator/sweep generator
# Integrated Amplifier
# Multimeter
# Speaker cables
Initial Control Settings:
# Power Switch OFF

# Filter OFF
# Level MIN (Full CCW)
# Phase, Auto/On switches do not matter
General Unit Function (UUT = Unit Under Test)
1) From the signal generator, connect one line level (RCA) cable to the Subwoofer Line Level Input jacks L/R on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs. Do not connect to the single, purple SUB input.
2) Turn on generator; adjust to 60mV, 50 Hz.
3) Plug in UUT; turn the power switch ON. Turn LEVEL control full clockwise (MAX)
4) LED should turn from Amber to Blue (on top of UUT); immediate and vigorous bass response should be heard and felt from port tube opening.Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remove woofers and test.

5) Turn off generator, turn LEVEL control of UUT full counterclockwise (MIN), and disconnect RCA cable.
6) Connect one pair of speaker cables to Speaker Level input terminal (IN) on UUT. The others end of the Cables should be connected to an integrated amplifier fed by the signal generator.
7) Turn on generator and adjust so that input level at the amplifier should be 1.2V, 50 Hz. 

8) Turn LEVEL control of UUT full clockwise (MAX).

9) LED should turn from Amber to Blue; immediate and vigorous bass response should be heard and felt from the port tube opening. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remove woofers and test.
Sweep Function test 

1) Connect one pair of speaker cables to Speaker Level input terminal (IN) on UUT. The others end of the Cables should be connected to an integrated amplifier fed by the signal generator.

2) Turn on generator and adjust so that input level at the amplifier should 1.2V, 50 Hz.  

3) Plug in UUT; turn the power switch ON.Turn LEVEL control of UUT full clockwise.

4) LED should turn from Amber to Blue; immediate and vigorous bass response should be heard and felt from the port tube opening.
5) Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remove woofers and test.
Driver Function test
1) Remove woofer from cabinet; detach + and - wire clips.
2) Check DC resistance of woofer; it should be 2.8 ohms +/-10%
3) Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V.
4) Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.

Power amplifier uses Complimentary pair MOSFET IRF640 and IRF9640

IRF640 - Power MOSFET

FEATURES
# Dynamic dV/dt rating
# Repetitive avalanche rated

# N-Channel
# Fast switching
# Ease of paralleling
# Simple drive requirements

Specification
VDS (V)	200
RDS(on) (Ohms)	VGS = 10 V 0.18 Ohm
Qg (Max.) (nC)	70
Qgs (nC)	13
Qgd (nC)	39
Configuration	Single

IRF9640 - Power MOSFET

FEATURES
# Dynamic dV/dt rating
# Repetitive avalanche rated
# P-channel
# Fast switching
# Ease of paralleling
# Simple drive requirements

Specification
VDS (V)	-200
RDS(on) (Ohms)	VGS = -10 V 0.50 Ohm
Qg max. (nC)	44
Qgs (nC)	7.1
Qgd (nC)	27
Configuration	Single

Precor treadmill – Precor C932i - C946i – How to access diagnostic mode – How to troubleshoot motor driver circuit board

Accessing the Diagnostic Software
The treadmill's diagnostic software consists of the following modes:
# Display Test
# Keyboard Test
# Heart Rate Test
# Belt Speed
# Incline
Procedure
1. Plug the power cord into the wall outlet, then turn on the treadmill with the circuit breaker.
2. Using the RESET key and the numeric keypad, press keys RESET,5,1,7,6,5,7,6,1, sequentially.

3. Hardware Validation will scroll across the display followed by DISPLAY TEST

4. Press the OK key, the upper most group of LED’s will illuminate on the display. Check the display to ensure that all LED segments are illuminated.
5. Press the OK key four more times to display the remaining LED groups. Check each display group to ensure that all LED segments are illuminated.
6. Press the Clear key (C932i) or BACK key (C946i) then the  DOWN key , KEYBOARD TEST will scroll across the display.
7. Press the OK key, a representation of all of the keys on the console will be displayed. Pressing a key on the console will cause the representation of that key to go off. Press all of the keys on the console to ensure that all of the keys are functioning.
8. Press and hold the Clear key (C932i) or BACK key (C946i) for 3 seconds, then the DOWN  key, HEART RATE will be displayed.

9. Grasp both of the heart rate grips on the handlebar, after a couple of seconds the heart rate will be displayed in the heart rate display and flashing heart (C932i) or smart rate bar (C946i).

10. Use chest strap transmitter or a test transmitter to test the wireless heart rate function, after a couple of seconds the heart rate will be displayed in the heart rate and smart rate displays.
11. Press the Clear key (C932i) or BACK key (C946i) then the DOWN  key, BELT SPEED will scroll across the display.
12. BELT SPEED test. Press the OK key, the console will display the power bits (PWRB), Press the SPEED UP  key to start the treadmill running belt, the display will indicate the power bits, the elapsed time and the actual speed (in either miles per hour or kilometers per hour depending on the club parameters setting.
13. Press the DOWN  key, the console will display the motor current (AMPS), the elapsed time and the actual speed then the DOWN  key, INCLINE will be displayed.
14. Press the Clear key (C932i) or BACK key (C946i) to exit the belt speed test.
15. INCLINE test. The console will display the analog to digital (A/D) incline position number and the incline position in percent of incline. Press the inline UP/DOWN, keys to operate the incline through out its range.
16. Press the Clear key (C932i) or BACK key (C946i) to exit the incline test.
17. If the incline is greater than 0%, AUTOLEVEL will be displayed and the incline will return to 0%.
18. Press the RESET key or the CLEAR key (C932i) or the BACK key (C946i) to exit the hardware validation test.

Troubleshooting the 3 Phase A.C. Drive Motor System
Circuit Description
The power control module converts single phase 120Vac or 240Vac into three phase variable frequency current for the A.C. drive motor. The motor speed is controlled by controlling the frequency of the drive motor current.
1. When taking voltage readings of the A.C. drive motor current, the readings will not be accurate because of the frequencies being used. However, they are indicative of the presence of drive motor voltage and relative frequency changes.
2. If the symptoms are the drive motor starts when you force the running belt to move and once running the drive motor runs “rough”, skip to step 10. If the drive motor will not start continue with step 3.
3. If the drive motor does not start, the power control module will only apply voltage for a couple of seconds before it shuts down. Therefore the voltage readings in the following step must be taken within the first couple of seconds after the treadmill is instructed to start the running belt.
4. Connect an A.C. voltmeter between terminals 4 & 5 of the OUTPUT connector on the power control module. Set the treadmill’s on/off switch in the “on” position. Press the QUICK START key. If the power control module is supplying output, you will momentarily read approximately 55 Vac. Set the treadmill’s on/off switch in the “off” position.
5. Repeat the procedure in step 4 between terminals 4 & 6 of the OUTPUT connector on the power control module.
6. Repeat the procedure in step 4 between terminals 5 & 6 of the OUTPUT connector on the power control module.
7. If one or more of voltage readings in steps 4 through 6 are not present, replace the power control module. If the voltage readings in steps 4 through 6 are present, continue with step 8.
8. Set the treadmill’s on/off switch in the “off” position. Disconnect the drive motor connector from the OUTPUT connector on the power control module. With an ohmmeter, measure between terminals 4 & 5, 4 & 6 and 5 & 6 of the drive motor connector. Each reading should be approximately 2.5Ohms. If any of the readings are significantly high or open, replace the drive motor.9. Connect an A.C. voltmeter between terminals 4 & 5 of the OUTPUT connector on the power control module. Set the treadmill’s on/off switch in the “on” position. Press the QUICK START key. If the power control module is supplying output, you will momentarily read approximately 55 Vac.

10. Repeat the procedure in step 4 between terminals 4 & 6 of the OUTPUT connector on the power control module.
11. Repeat the procedure in step 4 between terminals 5 & 6 of the OUTPUT connector on the power control module.
12. If one or more of voltage readings in steps 4 through 6 are not present, replace the power control module. If the voltage readings in steps 9 through 12 are present, skip to step 8.

ONN-ONA16AV010 - Universal Remote – Programming procedure – Code list for media players

Direct Code setup

1. Locate the Remote Code.
2. Manually turn on the device you wish to control.
3. Press and hold the SETUP button until the red indicator light stays on (approximately 2 seconds) and then release the SETUP button.
4. Press and release the desired device button on the remote (TV, CBL/SAT). The red indicator will blink once and then remain on.
5. Enter the first 4-digit code previously found in the code list using the number buttons on the remote. If the code entered is a valid code, the red indicator light will turn off. If the code entered is not a valid code, the red indicator light will flash and remain on allowing you to re-enter the code.
Note: If no buttons are pressed for 35 seconds, the remote will exit the SETUP mode and you will have to start over.

6. Point the remote at the device. Press the POWER button - if the device turns off, no further programming is required for that device. If the device does not turn off, return to step 3 and use the next code found in the code list. Continue this process until a code for your device is found.

Programming Notes

# If your device does not respond to the remote after trying all codes listed or your brand is not listed in the code list, use the Auto Code Search method to program your remote.
# Sometimes the first code that “works” with your device may operate only a few functions of your device. There may be another code in the code list that performs more functions. Try other codes from the code list for more functionality.
# You can use any device button to control other devices in your home entertainment system. For example, you can use the CBL/SAT device button to control an audio receiver.
# Write down the code found to operate your device for future reference.

Auto Code Search

The Auto Code Search searches automatically through all of the codes stored in this remote. Read all the following steps prior to starting the auto search as you will need to be prepared to lock in the proper code when found.
1. Manually turn on the device you wish to control.
2. Press and hold the SETUP button until the red indicator light stays on (approximately 4 seconds) and then release the button.
3. Press and release the desired device button on the remote (TV, CBL/SAT). The red indicator will blink once and then remain on.
4. Point the remote at the device and press and release the POWER button to start the search. The red indicator will flash (approximately every 2 seconds) as the remote searches.
NOTE: The remote must be pointed at the device for the duration of this search.
5. Place your finger on the #1 button so you are prepared to lock-in the code.
6. When the device shuts off or begins playing, press the #1 button to lock-in the code. The red indicator light will turn off. NOTE: You have approximately two seconds after the device shuts off or begins playing to lock in the code.
7. Point the remote at the device and check to see if the remote operates the device as desired. If it does, no further programming is required for that device. If it does not, return to step 2 and start the auto search.

Programming Notes

# This process may take several minutes as the remote contains many codes.
# The SETUP button can be used during the search process to reverse the direction of the search of the remote codes. For example, if you miss the code for your device and the remote is continuing to search (as indicated by the blinking red light), press the SETUP button and the code search will reverse direction and return to the code.
# When using the Auto Code Search programming method, the device button corresponding to the type of device you want to control must be selected (for example, the TV device button must be selected in step 3 if you want to control a TV.
# Sometimes the first code that “works” with your device may operate only a few functions of your device. There may be another code in the code list that performs more functions. Continue the code search as directed above until the best code is found.

STREAMING MEDIA

Apple 5541, 4295
Asus 1684
Dlink 1614, 1724
HP 1624
Iomega 1744
LG 1714
Magnavox 1704
Netgear 1604, 4475
Niveus 1634
Philips 1654
Popcorn Hour 1664
RCA 1694
Roku 4395, 4355
Seagate 1674
Sling Media 1644
Vudu 1734
WD 4345, 4265
X-Box 4245, 4255

Yamaha AV Receiver - RX-V573 - HTR-5065 – How to access diagnostic mode – Protection mode and causes – Firmware update procedure

Self-Diagnostic Function

While pressing the “TONE CONTROL” and “INFO” keys, press the (Power) key to turn on the power and keep pressing those 2 keys and  (Power) key for 3 seconds or longer. The self-diagnostic function mode is activated.

Canceling Self-Diagnostic Function
1. Before canceling self-diagnostic function, execute setting for “S3. FACTORY PRESET” menu. (Memory initialization inhibited or Memory initialized).
In order to keep the user memory preserved, be sure to select PRESET INHIBIT (Memory initialization inhibited)

2. Press the (Power) key to turn off the power

PROTECTION MODES AND CAUSES

When there is a history of protection function due to excess current.

Cause: An excessive current flowed through the power amplifier.
Supplementary information: As current of the power amplifier is detected, the abnormal channel can be identified by checking the current detect transistor.
Turning on the power without correcting the abnormality will cause the protection function to work immediately and the power supply will instantly be shut off.

When the protection function worked due to abnormal DC output

Cause: DC output of the power amplifier is abnormal.
Supplementary information: The protection function worked due to a DC voltage appearing at the speaker terminal. A cause could be a defect in the amplifier.
Turning on the power without correcting the abnormality will cause the protection function to work in 5 seconds and the power supply will be shut off

When the protection function worked due to abnormal voltage in the power supply section.

Cause: The voltage in the power supply section is abnormal.
Supplementary information: The protection function worked due to a defect or overload in the power supply.
Turning on the power without correcting the abnormality will cause the protection function to work in 1 seconds and the power supply will be shut off.

When the protection function worked due to excessive heatsink temperature.

Cause: The temperature of the heatsink is excessive.
Supplementary information: The protection function worked due to the temperature limit being exceeded.
Causes could be poor ventilation or a defect related to the thermal sensor.
Turning on the power without correcting the abnormality will cause the protection function to work in 1 seconds and the power supply will be shut off.

UPDATING FIRMWARE

Confirmation of firmware version and check
Before and after updating the firmware, check the firmware version and checksum by using the selfdiagnostic function menu.

Start up the self-diagnostic function and select “S4.
ROM VERSION/CHECKSUM” menu.
Using the sub-menu, have the firmware version and checksum displayed, and note them down.

When the firmware version is different from written one after updating, perform the updating procedure again from the beginning again.

Initializing the back-up IC

After updating the firmware, the back-up IC MUST be initialized by the following procedure to store the setting information (soundfield parameters, system memory and tuner presetting, etc.) properly

Start up the self-diagnostic function and select “S3. FACTORY PRESET” menu.

Select “PRESET RSRV”, press the (Power) key to turn off the power once and turn on the power again. Then the back-up IC is initialized.

Firmware Updating  procedure
1. Insert the USB storage device to the USB jack.
2. While pressing the “INFO” key, connect the power cable to the AC outlet.

3. The USB UPDATE mode is activated and “USB Update” is displayed. Writing of the firmware starts automatically.

4. When writing of the firmware is completed, “UPDATE SUCCESS”, “PLEASE...” and “POWER OFF!” are displayed repeatedly.

5. Press the (Power) key to turn off the power.
6. Remove the USB storage device from the USB jack.
7. Start up the self-diagnostic function and check that the firmware version and checksum are the same as written ones.

Precor Fitness Equipment – Error code troubleshooting – Treadmill error codes – Elliptical error codes

Error 25
Motor Controller Hardware Error
Applies to
TRM 800.v2
Issue Symptoms
This error monitors the functionality of the MC. If the software detects a defect in the MC the treadmill will stop working and Error 25 will be displayed.
Troubleshooting steps

Attempt to clear the error. It is does not clear, cycle power to the cycle three times. If the error persists, replace the MC.

Error 27, 28, 29
Drive Motor Current Overloading
Applies to
Treadmills
Overview
Characteristics of treadmill overloading are:
# Most frequent cause of treadmill shutting down.
# Overloading is most often caused by excess deck/belt friction, but can be made worse by line voltage conditions.
# Happens more often with heavier runners, but never walkers.
# In high user clubs (10 hours or more of use per day), the decks/belts will wear out much faster than at other locations, sometimes in months rather than years.
# Often accompanied by an error code:
# Error 27 (motor current too high)
# Error 28 (average input current too high, or motor controller overheated)
# Error 29 (instantaneous input current too high)

Error 27
Issue Symptoms for Error 27
The motor controller monitors the amount of current being delivered to the drive motor. The software sets a maximum amount of allowable drive motor current. This error indicates that maximum drive motor current has been reached. The most likely cause of this is a badly worn running belt/deck. Less likely but possible is a faulty drive motor causing high current demand.
Troubleshooting steps
1. Check the belt rating for TRM800.v2 treads. If below 2 replace the bed and belt.
2. For older treadmills, a clamp-on AC ammeter must be used to determine the amount of A.C input current being drawn by the treadmill under no load and loaded conditions. The current readings can be used to determine the condition of the running belt and/or running bed. Replace the running belt and/or running bed as required. Remember, many running beds are double sided and the bed can be flipped over rather than being replaced.
3. A known good drive motor must be substituted for the existing drive motor.

Error 28
Electronics Temperature Too High Issue Symptoms for Error 28

Treadmill motor controllers monitor the temperature of the motor controller output switching device. Typically, these motor controllers use a fan to force cool the output device’s heat sink. This error indicates that the heat sink temperature has exceeded maximum. The most common cause of this is a clogged cooling fan or heat-sink. Lesser causes include an inoperative cooling fan, a defective lower PCA or a faulty drive motor.
Troubleshooting steps
1. Check the cooling fan mounted on the lower PCA to ensure that the fan is not clogged with dust.
2. Thoroughly clean the fan and ensure that it spins freely.
3. As with Error 27, check the belt rating or current, and replace bed and belt as needed.
4. Replace the lower board.
5. Replace the motor.

Error 30, 31, 32, 33
Communication Errors
Applies to
All products
Issue Symptoms
Errors 30 through 33 all indicate the loss of communications or erratic communications between the microprocessors in the upper PCA and the lower PCA. The troubleshooting procedures for all of them are essentially the same.
# Error 30 is defined as upper PCA is active, the lower PCA is not communicating
# Error 31 is defined as faulty data received from lower PCA (extremely rare)
# Error 32 is defined as lower PCA is active, the upper PCA is not communicating
# Error 33 is defined as faulty data received from upper PCA (extremely rare)
The main reason for a general communication error is a faulty interconnect cable, either it is not connected securely, or it has become damaged. Error 30 can be caused by an overloaded or shorted +3.3VDC or +5VDC on the lower PCA, which can be caused by an external component plugged into the lower PCA. Error 32 is often caused right after service or installation, when the interconnect cable is unplugged from the upper PCA while the lower PCA is powered. It is also caused when the cable is plugged into the CSAFE port on the upper PCA. Less likely but possible is a defective upper or lower PCA.
Troubleshooting steps
1. Substitute a known good interconnect cable between the upper and lower PCAs to determine if the interconnect cable is defective.
2. Verify the interconnect cable is securely connected into the proper connectors on both PCA’s. The cable should lock, if the locking tab on the connector is broken replace the cable.
3. Unplug all the components from the upper and lower PCA's except the data cable and the AC power going to the lower PCA. If the unit does not show an error, plug in components one at a time, cycling power on after each new component is plugged in. If a communication error is newly displayed, the last component plugged in is the cause of the error.
4. Substitute a known good lower PCA to determine if the lower PCA is defective.
5. Substitute a known good upper PCA to determine if the upper PCA is defective.

Sony VPL-VW95ES – Service mode - Service mode settings

Service Mode Setting
1. Set the “Status” to “On” in the “Setup” menu.
2. Close the menu by pressing “MENU” if its displayed.
3. Press the buttons in the following order in 5 seconds: ENTER > ENTER > LEFT ARROW > ENTER
4. The message “Do you wish to enter into the SERVICE MODE? Yes No” will be displayed.
5. Select “Yes”.

Model Name Display Mode Setting
1. If the menu is being displayed, press the [MENU] button to close the menu.
2. Press the buttons within 5 seconds in the following order:
ENTER > UP ARROW > DOWN ARROW > ENTER
Even if the message “Not applicable!” is displayed, ignore it. If the key operations failed, wait for at least 6 seconds since the last key is pressed, and perform the key operations again.
3. “Which mode do you wish to display? Model Name Display/Motionflow/Off” is displayed.
4. Select “Model Name Display”.

Motionflow Mode Setting
1. If the menu is being displayed, press the [MENU] button to close the menu.
2. Press the buttons within 5 seconds in the following order:
ENTER > UP ARROW > DOWN ARROW > ENTER
Even if the message “Not applicable!” is displayed, ignore it. If the key operations failed, wait for at least 6 seconds since the last key is pressed, and perform the key operations again.
3. “Which mode do you wish to display? Model Name Display/Motionflow/Off” is displayed.
4. Select “Motionflow”.

IRIS Copy
1. Enter the Service Mode.
2. Set OTHER: 01 Iris/Adj in the Device Menu to 1.
3. Change the value of OTHER: 02 Iris/Open Reg.
4. Change the value of OTHER: 03 Iris/Close Reg.
5. Return OTHER: 01 Iris/Adj in the Device Menu to 0.
6. Perform Save to Memory.

Panel Driver Gain B Copy
1. Enter the Service Mode. 
2. Change the value of Panel Driver: 03 P. Drv/Gain B in Device Menu.
3. Perform Save to Memory

Lens Shift Data Copy
1. Enter the Service Mode. 
2. Change the value of OTHER: 13 Lens Shift/H Center in Device Menu.
3. Change the value of OTHER: 14 Lens Shift/V Center in Device Menu.
4. Change the value of OTHER: 15 Lens Shift/V Top Limit in Device Menu.
5. Change the value of OTHER: 16 Lens Shift/V Bottom Limit in Device Menu.
6. Change the value of OTHER: 17 Lens Shift/Right Limit in Device Menu.
7. Change the value of OTHER: 18 Lens Shift/Left Limit in Device Menu.
8. Perform Save to Memory.

Panel Alignment Data Copy
1. Enter the Service Mode. 
2. Change the value of Display Engine: 06 R REG H in Device Menu.
3. Change the value of Display Engine: 07 R REG V in Device Menu.
4. Change the value of Display Engine: 08 B REG H in Device Menu.
5. Change the value of Display Engine: 09 B REG V in Device Menu.
6. Perform Save to Memory.

Matrix fitness treadmill - Matrix T5x-07 – Auto calibration procedure - How to access manager mode – How to access service mode – Error code and troubleshooting

Engineering mode

1. To enter Engineering Mode, hold the INCLINE DOWN and SPEED DOWN keys for three seconds until Manager Mode appears on the middle LED display.
2. Press any UP arrow key and Engineering Mode will appear on the display.
3. Press ENTER once Engineering Mode is displayed.
4. To scroll between programs in the Engineering Mode, press any UP or DOWN arrow key.
5. Press ENTER to modify the program settings once displayed.
6. Press any UP or DOWN arrow key to change value.
7. Once program setting is correct, press ENTER to save.
8. Press the EMERGENCY STOP to exit Engineering Mode

Service mode

1. To enter Service Mode, hold the INCLINE DOWN and SPEED DOWN keys for three seconds until Manager Mode appears on the middle LED display.
2. Press any DOWN arrow key and Service Mode will appear on the display.
3. Press ENTER once Service Mode is displayed.
4. To scroll between programs in the Service Mode, press any UP or DOWN arrow key.
5. Press ENTER to modify the program settings once displayed.
6. Press any UP or DOWN arrow key to see value.
7. Press the EMERGENCY STOP to exit Service Mode

Auto Calibration Procedure:1) Press and hold the INCLINE DOWN and SPEED DOWN keys for three seconds until Manager Mode appears on the middle LED display.
2) Press any UP arrow key and Engineering Mode will appear on the display.
3) Press ENTER once Engineering Mode is displayed.
4) Scroll between programs in the Engineering Mode using any UP or DOWN arrow key until Auto Calibration appears on the middle LED display.
5) Press ENTER once Auto Calibration is displayed. You should not be standing on the running belt.
6) After completion, the display will state whether the Auto Calibration passed or failed.

Manager mode

1) To enter Manager Mode, press & hold INCLINE DOWN and SPEED DOWN at the same time for 3-5 seconds until Manager Mode appears on the display.
2) To enter the Manager Mode, press ENTER once Manager Mode appears on the display.
3) To scroll between programs in the Manager Mode, press any UP or DOWN arrow key.
4) Press ENTER to modify the program settings once displayed.
5) Press any UP or DOWN arrow key to change value.
6) Once program setting is correct, press ENTER to save.
7) Press the EMERGENCY STOP to exit Manager Mode.

Error messages 0140 / 01a0 / 01a2
1) symptom:
a. 0140 - Incline motor operation failed.
b. 01A0 - Incline motor disconnected.
c. 01A2 - Incline motor is detected in the reverse of the position indicated by the potentiometer.
2) Solution
a. Check the connection of the incline motor cable at the MCB.
b. Run auto calibration
c. If auto calibration fails, re-enter Engineering Mode and scroll until Elevation Minimum is displayed, then press ENTER.
- Check the MCB LEDs. If  LED (DOWN )has no light, check the console cable connections at the console and MCB.
Replace the console or cable as needed. If LED DOWN has a light, replace the incline motor.
d. If the incline motor does not resolve the issue, replace the MCB.

Error message 01a3
1) symptom:
a. Motor is disconnected.
2) Solution:
a. Check the connection of the motor cable at the MCB
b. Check to see if the MCB LED DSP1 (MCU) is lit.
c. If LED DSP1 is blinking, the motor should be replaced.
d. If LED DSP1 is a solid light, replace the motor.
e. If LED DSP1 is not lit, replace the MCB

Error message 01a8 / 02b6 / 02b7 / 02b8
1) symptom:
a. 01AB - Motor over current.
b. 02B6 - Speed up is overcurrent.
c. 02B7 - Speed down is overcurrent.
d. 02B8 - Running status is overcurrent.
2) Solution:
a. Check the condition of the running deck and belt. Replace the belt and flip or replace the running deck as needed.
b. Replace the MCB.

Error message 02b9 / 02ba / 02bd
1) symptom:
a. 02B9 - The inner memory IC data write error.
b. 02BA - The inner memory IC data read error.
c. 02BD - Inverter hardware interrupt error.
2) Solution:
a. Check LED DSP1 (MCU) on the MCB.
b. If this LED is blinking, replace the console.
c. If this LED is a constant light, replace the MCB.
d. If this LED is not lit at all, check the power to the MCB.

Magnavox 50MF412B - Service mode – Service mode adjustments

Service mode:
1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Features”.
4. Select “Software Upgrade”.
5. Select “Current Software Info”.
6. Press [0], [4], [2], [5], [7], [4] and [INFO] buttons on the remote control unit in this order. 

Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the service mode.
2. Each time the [7] button on the remote control the display changes.

3. To cancel or to exit from the Purity Check Mode, press [CH RETURN] or [PREV CH] button.

White Balance Adjustment
Purpose: To mix red and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.

1. Operate the unit for more than 60 minutes.
2. Enter the service mode.
3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode. “Drive” appears in the screen.
4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.

Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
5. Press [3] button to select the “HDB” for High Drive Blue adjustment. (“HDB” appears in the screen.)

6. Press [MENU] button. The internal Raster signal appears in the screen.

7. Press [CHANNEL UP/DOWN] buttons to adjust the color temperature becomes 12000 degree K (x= 0.272 / y= 0.278 +/- 0.002).
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again.
10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.

11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
12. If necessary, adjust the “LDB” or “LDR” again.
13. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode. If there is no message under “[WB]” section, this adjustment completes.
If “Drive settings are NG. Retry.” is displayed, repeat above steps from 5. to 12. 

Then check “Debugging Message” again. If “Drive settings are NG. Retry.” is displayed, replace the LCD Panel or Digital Main CBA.
14. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button.

INITIALIZE THE LCD TV
NOTE: Disconnect any device from the USB Port before you conduct on this procedure.
1. Turn the power on.
2. Enter the service mode.
- To cancel the service mode, press [POWER] button on the remote control unit.
3. Press [BACK] button to enter the Panel Key Confirmation Menu.
4. Press any button on the touch sensor panel.
5. Press [INFO] button to proceed with the self check mode.
6. Make sure to confirm the “INITIALIZED FINISH” appears in the green screen.
7. Unplug the AC Cord and plug it back on again.

How to

Samsung plasma TV – Plasma TV Power supply Troubleshooting, Plasma television repair and service

SMPS

The SMPS power supply will vary slightly depending on the screen size. Both however will function identically.

Power supply removal requires the tech to remove either 6 or 8 screws be removed depending on the model and size of screen. After replacement of the SMPS make sure the voltages are adjusted according to the label posted on the panel.

The power supply provides switched and unswitched voltages for operation. The unswitched voltages are present as long as the unit is plugged into the wall. The +5VDC supply operates the main CPU on the digital board. The +33VDC supply is used by the tuner.
The other voltages are used by the panel drive circuits creating the Va,Vs,Vset and Ve voltages.
The Power Factor Control (PFC) circuit is used to save energy. Taking advantage of the capacitive effect of the pixel elements allows the power supply to operate at a reduced duty cycle. Using a large inductor and the capacitive effect of the panel allows energy to be stored and accessed as needed.
A separate transformer supplies the +5VDC Stand-By B+ to the Digital board. This voltage powers the Microprocessor (IC201) and enables the Key Matrix and the Remote IR Sensor. This turns on the relay activating the rest of the Power Supply PCB. If this supply is missing or low the unit will not turn on. If this signal is not present check the supply voltage for the micro.

Power Supply Troubleshooting

If the Ve voltage is low or missing disconnect the power supply cable from the X board. If the Ve voltage rises the X board is probably shorted. If the voltage stays low the SMPS board needs to be replaced. If the Vs voltage is low or missing it can be caused by a defective X or Y board. Check both boards for short circuits before replacing the SMPS board. If the Vs voltage is too high an effect called diffusion may occur. Diffusion is when the initialize voltage is too high. Excessive voltage causes unwanted pixel firing creating intermittent sub-pixel flashes. Power on-off cycling can be caused by a shorted component on the Logic board loading down the standby 5V.

Power Supply Failure Examples

One possible symptom is defects in the video such as herringbone noise

# Other symptoms would be similar to X or Y board failures as the SMPS board provides the power to these boards
# Before replacing an X or Y board be sure the Vs, Vsc and VE voltages are being provided by the SMPS board.

If the Ve voltage is low or missing disconnect the power supply cable from the X board. If the Ve voltage rises the X board is probably shorted. If the voltage stays low the SMPS board needs to be replaced. If the Vs voltage is low or missing it can be caused by a defective X or Y board. Check both boards for short circuits before replacing the SMPS board. If the Vs voltage is too high an effect called diffusion may occur. Diffusion is when the initialize voltage is too high. Excessive voltage causes unwanted pixel firing creating intermittent sub-pixel flashes. Power on-off cycling can be caused by a shorted component on the Logic board loading down the standby 5V

Power Supply Adjustments

Each plasma panel has a unique voltage setting required to display a picture properly and maintain long life. Incorrect adjustment of the power supply can create picture errors. Whenever a power supply board is replaced the new board must be adjusted to match the panel values shown on the sticker.
If a power supply board is replaced it is imperative that the new power supply be adjusted to match the existing panel settings. Incorrect adjustment can cause the picture to be too dark or too bright. Extreme misadjustment can greatly reduce panel life.

Locations of the test points and adjustments on a typical SMPS power supply. These adjustments must be performed when the SMPS or the panel is replaced.

Protection Circuits

Over Voltage Protection
The Power Supply PCB has an Over Voltage Protection circuit as well as a regulator circuit. It is designed so that when an Over Voltage condition occurs in any part of the power supply it does not affect another output stage. The following table shows the Over Voltage specifications. The unit must be unplugged to reset this error.

Intermittent shutdown may be caused by an over-voltage condition.

Item	Over Voltage Point
D3.3VDC	4.7VDC
D6VDC	8.2VDC
VA (typically 75VDC)	94VDC

Over Current Protection
If a short circuit occurs on either the VS, VA, 12V, 6V or 3.3V lines, the SMPS stops operating, but should not fail. When the short circuit is removed from the source line, the Power Supply will operate normally again.

Power Supply Diffusion

The diffusion problem can be seen using the sweeping test pattern located in the customer menu under the burn protection selection. Diffusion is caused by a power supply that is not properly matched to the panel.

Over diffusion is the most common symptom, this is where the SMPS is providing to much Vs voltage for the panel.

SMPS adjustments to eliminate the diffusion problem.

Allow the unit to warm up 15 to 20 minutes to stabilize the SMPS Operation
# Access the Customer Setup Menu, then Screen burn protection, then Signal Pattern
# Adjust the Vs voltage while monitoring the screen. Adjust the Vs voltage up or down, if the diffusion error is not diminished as the voltage change approaches 10 volts the panel needs to be replaced
# Do not adjust the Vs voltage more than 15VDC from the value printed on the panel label.