MITSUBISHI - DLP PROJECTION HDTV - WD-57733 - WD-57734 - WD-57833 - WD-65733 - WD-65734 - WD-65833 - WD-73733 - WD-73734 - WD-73833 – Circuit adjustment procedure – Geometrical adjustment

Circuit Adjustment Mode
On these models, the Circuit Adjustment Mode is used for:
# Test Signal activation
# Horizontal and Vertical Centering
# Auto-alignment of edge geometry
# The following adjustments may only be performed using the remote control.
Horizontal and Vertical Centering Adjustment
1. Activating the adjustment mode
1. Press the “MENU” button on a remote hand unit. (The “MENU” display will appear.)
2. Press the buttons “2”, “4”, “5” and “7” in that order. (Adjustment mode will appear.)
If not changed to the adjustment mode press “EXIT” and repeat steps 1 and 2.
2. Test Signal Activation (for H and V position adjustment)
When in the Circuit Adjustment mode, press “PLAY” then “REWIND” twice on the remote control to activate the test pattern. This pattern is used for H+V electrical centering adjustments. To cycle through the various test patterns, press PLAY then REWIND or FAST FORWARD.

3. Adjustment Function Selection

Use the “AUDIO” button to select a specific Adjustment Function.
NOTE: There are 2 Service Functions on these chassis: “TVM” and the “ASIC” function.
4. Adjustment Selection
Use the “VIDEO” button to select a specific electrical adjustment, “1.HVPOS”.

5. Adjusting Data

After selecting an adjustment item, use the “UP/DOWN/LEFT/RIGHT” buttons to change adjustment.
# If the “UP/DOWN” button is pressed, the VPOS adjustment data changes.
# If the “LEFT/RIGHT” button is pressed, the HPOS adjustment data changes.
6. Saving data
Press “ENTER” to save the adjustment data in memory.
The display characters go red for approximately one second in this step.
Note: If the circuit adjustment mode is terminated without pressing “ENTER”, changes in adjustment data are not saved.
16-Point Geometric Distortion Correction
Summary:
# Calculates new geometry based on positional movement of 16 points
# 16-Point correction replaces mechanical adjustment
# Alignment does not effect center, it only affects the edge geometry
# When the adjustment mode is activated all 16 points will be set to default position
# Pressing the INFO button will perform the distortion calculation and finalize the adjustment
# The adjustment is not saved until the ENTER button has been pressed
# Pressing the ENTER button will save, however it will not indicate this in any manner
# For the adjustment to work properly all 16 points must be aligned before pressing INFO button
NOTE: In the PC Input or FX Game Mode electronic geometric correction is not available.

A. Activating the Adjustment Mode
1. Press the “MENU” button on a remote hand unit. (The “MENU” display will appear.)
2. Press the buttons “2”, “4”, “5”, “7”, pause and then press “0” (Data Selection Mode will appear)

Data Selection Mode

3. Use the UP/DOWN arrows to highlight “MANUAL KEYSTONE GEOMETRY ALIGNMENT” and press ENTER.

The following pattern appears.
NOTE 1: If data is out of range, you may need to perform reset - Press (1) then INFO). This nulls all correction data.
NOTE 2: To restore the original factory correction data, repeat steps 1 thru 3, select “RESTORE KEYSTONE GEOMETRY FROM BACK UP” and press “ENTER”.

B. Manual Keystone Geometry Alignment (There are 2 modes of adjustment: FULL and TOUCH UP)

A. FULL ADJUSTMENT MODE:

Part 1
(Note: if data is out of range, you may need to do a reset before starting - press “1” then “INFO”)
1. When entering the Keystone Adjustment mode you will see the test pattern as shown in the drawing above.
The point in the upper left corner will be a cross.
2. Starting from the 1st point (upper left corner) use the “UP/DOWN/LEFT/RIGHT” buttons to adjust the selected point (selected point is the one that is a cross)
3. Align each point in a straight line, use the bezel as a reference. See example drawing below.
NOTE: Only the cross will move. The pattern will not change.
4. Use “FASTFORWARD” button to move between each point or “REWIND” to go back.
Part 2
5. After all 16 points are aligned properly, pressing the “FASTFORWARD” button again automatically activates the 4:3 mode (there is no change in the display). There are 11 patterns, each with a small variation of distortion in the 4:3 mode vertical lines. Continue pressing “FASTFORWARD” to cycle through the 11 patterns until you find the straightest 4:3 lines, then go to step 6.
6. Press the “ENTER” button to save the adjustment and “EXIT” to leave the Adjustment Mode..
Note: There will be no indication that the save was successful.

3. Verify Geometry by using internal test pattern. If not even, redo the above steps or enter the TOUCHUP ADJUSTMENT MODE (Note: 4:3 adjustment not available in Touchup mode)

B. TOUCH UP ADJUSTMENT MODE

1. Enter the Keystone Manual Geometry Alignment.
2. Use the “FASTFORWARD” or “REWIND” buttons to move to the point you want to touch up.
3. Use the “UP/DOWN/LEFT/RIGHT” buttons to adjust the point. Only the cursor will move, the test pattern will not change.
4. Press the “INFO” button to apply the correction. The test pattern will show the correction. Repeat steps 2-3 as needed.
5. Press the “ENTER” button to save your changes.
6. Press the “EXIT” button to leave the alignment mode.
Note: If data is ever adjusted so that lines are showing severe distortion, you can reset to default data by pressing “1” then “INFO”.

HP Laserjet pro M351 - M451 – NVRAM initialization – error code and causes - calibration procedure

Calibration procedure
calibration is a product function that optimizes print quality. if you experience any print-quality problems, calibrate the product.
1. Open hp toolboxfx (hp device toolbox).
2. Click the system tab, and then click the print quality link.
3. In the area for color calibration, select the calibrate now check box.
4. Click apply to calibrate the product immediately.
Error codes
Error 10.0000
description
the memory chip for one of the print cartridges cannot be read or is missing.
# 10.0000 = black memory chip error
# 10.0001 = cyan memory chip error
# 10.0002 = magenta memory chip error
# 10.0003 = yellow memory chip error
# 10.1000 = black memory chip is missing
# 10.1001 = cyan memory chip is missing
# 10.1002 = magenta memory chip is missing
# 10.1003 = yellow memory chip is missing
recommended action
reinstall the print cartridge.
Turn the product off and then on.
if the problem is not solved, replace the print cartridge.
Error 49
description
the product experienced an internal error.
Recommended action
turn the product off, wait at least 30 seconds, and then turn the product on and wait for it to initialize.
if you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product power on.
Error 50.00
description
the product has experienced an error with the fuser.
Recommended action
turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
Turn off the product, wait at least 25 minutes, and then turn on the product.
If you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product power on.
Error 51.00
description
the product has experienced an internal hardware error.
Recommended action
turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
if you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product on.
Error 55.0
description
the product has experienced an internal error.
Recommended action
turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
if you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product power on.
Error 57
description
the product has experienced a problem with its internal fan.
Recommended action
turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
if you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product power on.
Error 59.0
description
the product has experienced a problem with one of the motors.
Recommended action
turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product power on.
error  79
description
the product has experienced an internal firmware error.
Recommended action
turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
if you are using a surge protector, remove it. plug the product directly into the wall socket. turn the product power on.
Error 79 - service error
description
an incompatible dimm is installed.
Recommended action
1. Turn the product power off.
2. Install a dimm that the product supports.
3. Turn the product on.
NVRAM initialization procedure
1. Turn the product off.
2. Simultaneously press the right arrow button and the cancel button. keep these buttons depressed as you turn the product on.
3. When permanent storage init. appears on the display, release both buttons.
4. When the product has finished the NVRAM initialization, it returns to the ready state.

Funai B4-M500 - B4-M501 - B4-M502 – Blu-ray players - How to initialize the player - Firmware update – Network update

How to initialize the blu-ray disc player
to put the program back at the factory-default, initialize the bd player as the following procedure.
note:
# by initializing, network is reset to disconnected state and “network service disclaimer” appears on the screen.
# once the unit is initialized, the unit starts from initialization the next time it is turned on. the  initialization allows quick set up of language and network settings. to exit this mode, select “cancel” on the screen.
1. turn the power on.
2. remove the disc on the tray and close the tray.
3. press [skip up], [1], [2], and [3] buttons on the remote control unit in this order

4. press [ stop ] button on the remote control unit.
5. after initializing, the power will turn off automatically.

Firmware renewal mode

1. turn the power on and remove the disc on the tray and close the tray.
2. press [skip up], [6], [5], and [4] buttons on the remote control unit in this order.

3. select “disc” or “usb” or “sd card” and press [ok] button on the remote control unit.
4. insert the disc or usb memory stick or sd card for version up.
5. the bd player enters the f/w version up mode automatically. make sure to insert the proper f/w for the state of this model.

6. after the update, the power will turn off automatically.
7. the power turns back on automatically. remove the disc or usb memory stick or sd card from the unit.
Note: all the settings will be put back to factory default.
the following usb memory stick/sd card can be used for software update. make sure to use a device that has enough space.
# usb memory stick (fat16/fat32 file system)
# sd/mini sd/micro sd card (fat12/fat16 file system)
# sdhc/mini sdhc/micro sdhc card (fat32 file system)

how to verify the firmware version
1. turn the power on.
2. remove the disc on the tray and close the tray.
3. press [skip up], [1], [2], and [3] buttons on the remote control unit in this order.

4. to exit this mode, press [ stop ] button.

Network update
1. press [home] button to display setup menu.
2. select settings - others - software update - network.
3. when “yes” is chosen, the [network connecting ] screen appears and the unit starts connecting to the network.

4. the firmware version confirmation screen  will appear on the screen. select “yes” and press [ok] button.

5. firmware downloading starts.
6. upon completion of downloading,  “download has been completed” will appear on the screen. press [ok] button.

7. the unit starts reading the firmware.

8. updating starts automatically.

9. the power turns off automatically.
10. the power turns back on automatically.

How to eject disc
when a disc cannot be removed due to malfunction or when an unplayable disc is inserted, follow the procedure below to remove the disc.
Procedure a
1. unplug the ac adapter and then plug it in.
2. turn the power on by pressing the [ eject ] button and the disc will be ejected automatically.
Procedure b
1. remove the front assembly.
2. while pressing the portion a down, slide the portion b in the direction of the arrow as shown below to eject the disc.

Janome sewing machine - Janome 2160DC - DXL603 –Mechanical adjustment – Self diagnosis and Troubleshooting

Troubleshooting
1. Skipping Stitches
1. Needle is not inserted properly.
2. Needle is bent or worn.
3. Incorrectly threaded.
4.Needle or thread are inappropriate for the fabric being sewn.
5. Sewing on stretch fabric.
6. Inappropriate needle bar height.
7. Inappropriate needle to hook timing.
8. Inappropriate needle to hook clearance.
* Insert the needle properly.
* Change the needle.
* Re-thread.
* Use the recommended sewing needle and thread.
* Use a HA x #11 blue tip needle.
2. Fabric not moving
1. Incorrect feed dog height.
2. Feed dog is in down position.
3.Thread on bottom side of fabric is jammed up.
4. Feed dog teeth are worn.
* Adjust the presser bar level to make the pressure stronger. See mechanical adjustment “Feed dog height”.
* Raise the feed dog.
* Make sure to bring both needle and bobbin threads under the foot when start sewing.
* Change the feed dog.
3. Breaking upper thread.
1. Initial sewing speed is too fast.
2. Thread path is incorrect.
3. Needle is bent or dull.
4. Top tension is too strong.
5. Needle size is inappropriate for fabric.
6. Needle eye is worn.
7. Needle hole in needle plate is worn or burred.
* Start with medium speed.
* Use the proper thread path.
* Replace with a new needle.
* Adjust top tension correctly.
* Use appropriate needle for fabric and thread in use.
* Change the needle.
* Repair the hole or replace the needle plate.
4. Breaking bobbin thread.
1. Bobbin holder is incorrectly threaded.
2. Too much thread is wound on the bobbin.
3. Lint is stuck inside the bobbin holder.
4. Thread quality is too low.
5. Thread is jamming around the bobbin holder.
* Set the bobbin thread correctly.
* Adjust the position of bobbin winder stopper.
* Clean the bobbin holder.
* Change to a high quality sewing thread.
* Clear out the jamming thread.
5. Needle breakes
1. Needle is hitting the needle plate.
2. Needle is bent or worn.
3. Needle is hitting the hook.
4. Fabric is being pulled too strongly while sewing
6. Noisy operation
1. Backlash between hook gear and lower shaft gear is too great.
2. Lower shaft gear is loose.
3. Inappropriate belt tension.
4. Not enough oil.
5. Upper shaft gear is loose.
* Eliminate the backlash.
* Eliminate the looseness.
* Oil all moving parts.
* Eliminate the looseness.
7. Deformation pattern
1. Inappropriate feed balance.
2. Top tension is too strong.
Adjust the feed balancing screw.
MECHANICAL ADJUSTMENTS 
Presser bar height Adjustment 
The distance between the bottom of the presser foot in up position and the needle plate should be 6.0 mm.
1. Remove the face plate and needle.
2. Lower the feed dog below the needle plate. Place a block 6 mm thick under the presser foot and lower the presser foot lifter (2).
3. Loosen the setscrew (1). Raise the presser foot lifter and tighten the setscrew (1) firmly. Attach the needle and face plate.
NOTE: Make sure that the presser foot should be parallel to the feed dog slots e in the needle plate.
Adjustment of hook timing
The amount of ascending travel of the needle bar from its lowest position to the position where the tip of the rotary hook exactly meets the right side of the needle should be 3.25 to 3.55 mm.
1. Remove the needle plate and bobbin holder.
2. Turn the power switch on.
3. Select the pattern (left position). Set the zigzag width at 0.
4. Remove the free-arm cover.  Turn the hand-wheel toward you to lower the needle at its lowest position.
5. Loosen the hexagonal socket screw (2) (2 pcs.).
6. Move the needle bar 3.4 mm from the lowest position.
7. Turn the lower shaft gear until the tip of hook meets the right side of the needle while holding the hand-wheel.
8. Tighten the hexagonal socket screw (2) (2 pcs.).
9. Attach the free-arm cover, bobbin holder and needle plate.
Adjustment of needle bar height
Before proceeding with this adjustment, check the hook timing . The distance between the upper edge of the needle eye and the tip of the hook should be in the range of 1.6 to 2.0 mm when the tip of the hook timing meets right side of the needle in the left needle position as the needle ascends from its lowest position.
1. Remove the needle plate, bobbin holder and face plate.
2. Turn the power switch on.
3. Select the pattern (left position). Set the zigzag width at 0.
4. Turn the hand-wheel toward you until the tip of hook meets the right side of the needle.
5. Loosen the hexagonal socket screw (1).
6. Move the needle bar to adjust the needle bar height, and tighten the hexagonal socket screw (1). Be careful not to turn the needle bar.
7. Attach the bobbin holder, needle plate and face cover.
Top tension
The top tension should be between 65 and 80g when pulling the thread up in the direction of C.
3 Use polyester sewing thread #50 (White).
* If it is not within the above limit, adjust as follows.
1. Set the tension dial “Auto”.
2. Remove the cover.
3. Lower the presser foot.
* If the top tension is too loose, turn the lead screw in the direction (A).
* If the top tension is too tight, turn the lead screw in the direction (B).
4. Check the top tension and attach the cover.
Self-diagnostic Test
Preparation:
1. Turn the power switch off.
2. Move the bobbin winder spindle to the left.
3. Raise the feed dog.
4. Set the speed control lever to the left.
5. Remove the presser foot and raise the presser foot lifter.
6. Turn the hand wheel toward you to raise the needle to its highest position.
Notes:
* Be careful: the sewing machine may start running in its own while in test mode.
* Turn off the power switch before replacing any parts.
* Repeat the diagnostic test until the problem has been resolved.
* You can skip steps in the diagnostic procedure and go directly to the test you want to perform.
(Enter self-diagnostic mode, then select the step number of the diagnostic test you require by pressing the start/stop button)
To begin:
Turn on the switch, if any of the following problems occur, take the recommended actions in the order they are shown.
1. The machine does not respond when the power switch is turned on:
* Check each connector connection
* Replace the machine socket
* Replace the Switching regulator.
* Replace the A-board
2. The sewing machine lamp does not light up:
* Replace the light bulb
* Replace the A-board
To enter self-diagnostic mode:
1.Turn the power switch on while simultaneously pressing needle up/down button and the locking stitch button.
2. The LCD display will indicate “01”.
3. Press the start/stop button to enter the self-diagnostic mode.

Classe CAM 350 – Mono Block Power amplifier – Protection mode – Troubleshooting – How to check output transistor – Idle current adjustments

Protection and Indicators Modes 
The front LED shows the status of the amplifier. When starting up normally, the CAM350 will show a FLASHING RED LED for about 15 seconds and if all is normal, the LED will go SOLID RED. If there is a fault, the LED will go to a FLASHING GREEN LED. The CAM350 is equipped with four Mosfet protection fuses. In the event that one or more of these fuses would blow, first need to identify and cure the cause of failure. When the cause has been identified, disconnect the unit from the system including the AC power. Remove the top cover and look for damaged or burned components. If no other components than the fuses appear to be damaged,  then replace the broken fuses with the same value and rating. The Mosfet fuses are located on the control board. When replacing fuses, make sure that the fuse holder are holding the fuses very tightly. A loose fuse holder can translate into distortion on top of the signal.

Calibrations and Adjustments
Bias adjustment:
Note: Bias adjustment should be made without any load connected to the amplifier’s output, and no signal connected to the amplifier’s input.
1. On positive rail, connect a multimeter to R111 leads and set the multimeter to mV scale.
2. Turn trimpot R104 counterclockwise until it reaches 0 Ohm. A click should be heard.
3. Turn on amplifier, and let it warm up for 15 minutes on idle.
4. Adjust trimpot R104 to get a 10mV reading.
5. Repeat procedure with negative rail.
6. Let the amplifier warm up for a 24 hours period with signal and load.
7. Remove signal and load, and reconnect the multimeter, setted to mV scale, to R112 leads.
8. Readjust R104 to get a 12mV reading.

DC offset:

Note: DC offset adjustment should be made without any load connected to the amplifier’s output, and no  signal connected to the amplifier’s input.
On these units, DC offset can’t be adjusted. Measure DC offset using a voltmeter connected to the output posts, scale stetted to mV. DC offset should be less than 10mV.

How to enter service mode – Pioneer Pro-grade digital DJ deck, Pioneer CDJ 2000NXS – error codes, self diagnosis

Service mode
The following service modes are prepared for this unit.
1. Confirmation of the button input and an indication function.
It is the mode which checks each input and display function of a button, a JOG dial, the slider volume, a encoder and a needle pad.
2. Check mode of the load of JOG dial.
It is the mode which measures the load when rotating JOG dial.
3. Indication of various information
It is a mode displaying information such as a version and an error history, a device normal / abnormality judgment.
4. Error display list
An error code and the contents are shown.
5. Drive Self-Diagnosis
It is the mode which performs self-diagnosis of a drive unit.
6. Contents of drive self-diagnosis
It is explanation of the contents of self-diagnosis of a drive unit.
7. Confirmation of movement of the drive unit
It is the mode which checks operation of a mechanism and servo of drive unit.
8. Output of the alarm port
Explanation of the meaning of output of status terminal on a PC Board.
9. Firmware update.
Method of firmware update.

How to enter to service mode

When it spends a power supply while pushing a TEMPO button and a MEMORY button simultaneously, It is displayed in the LCD display part, "CDJ-2000NXS SERVICE MODE", and enters into this mode.

When it enters this mode, the TAG-TRACK button is pushed, and the screen will show on the display.

In this mode, the input of each button, JOG, volume, etc. is normal, and it can check that a display can also be performed normally.

In addition, indication turns on while you push a button.

Drive Self-Diagnosis

Self-diagnosis of a drive is performed through three steps.
It waits to push a button, after are displayed as [Push PLAY Button] at the beginning of each step and inserting a predetermined disc.
If a disk is inserted and PLAY button is pushed, a display of [Executing--] will blink and diagnosis will be started.
After diagnosis is completed successfully, it is displayed as [Complete] and a disk is ejected automatically.

Contents of drive self-diagnosis

 (1) CD-LD life check
The addition time which LD had turned on is checked and degradation condition is judged.
If addition time is over 7000 H, display it with NG. NG judgment reason: Because the Laser Diode becomes 1% of the rate of failure in 7000 H or more. Over 7000 H in the case of "NG", you measure LD current, and perform failure judgment of the Pickup.
(2) DVD-LD life check
Same as the above.
(3) Focus actuator check
To detect the disconnection of the actuator. Current is passed to an actuator using an external circuit, and a disconnection part is detected by reading the  voltage value divided by resistance by A/D. State of FFC connector mounting, state of FFC insertion, and disconnection of the actuator are detected synthetically. Since the probability which Focus and Tracking both disconnect is low, as for the case of both NG, suspect FFC insertion.
(4) Tracking actuator check
Same as the above.
(5) Stepper check
To detect "A stop of the Stepper by foreign substance mixing, the stack, etc", "the defect of an inside switch", and "the step-out of the Stepper by the shortage of lateral-pressure with faulty mechanism parts". It checks that the Stepper can perform predetermined operation certainly using an inside switch.
(6) Oleic check
To detect omission of OEIC.
It detects by checking disk existence using CD.
(7) Disc motor check
To detect the defect of a spindle motor.
A motor is started and the attainment time to 2000 rpm is checked.
(8) CD/LD power & lens dirt check
It checks whether CD-LD power adjustment is appropriate and whether the object lens is dirty.
The peak value and bottom value of the main beams A, B, C, and D are measured by A/D, and it judges whether it is the level which can continue a playback.
(9) Optical system dirt check
Same as the above.
(10) CD error rate check
An error rate is measured and the last check is performed.

(11) DVD-LD power check
It checks whether DVD-LD power adjustment is appropriate and whether the object lens is dirty.
The peak value and bottom value of the main beams A, B, C, and D are measured by A/D, and it judges whether it is the level which can continue a playback.
(12) DVD error rate check
An error rate is measured and the last check is performed.
(13) User CD physical check
When there is offer of a disc from a user, it distinguishes whether it is that a disc is the cause.
The characteristic of a user disk is checked from automatic adjustment value.
A disk uses only CD (from a past actual result).
(14) User CD scratch check
The error rate of the whole disk is measured per 1 minute, and best value and worst value are calculated.
The state of a disc is checked from those relations.
(15) User CD quality check
Same as the above.
(16) User CD dirt check
Same as the above.

How to update the firmware – Samsung Blu-ray player BD P4600, BD P4610 – deck adjustment procedure

Samsung BD-P4600 - BD-P4610 - deck adjustment – Firmware update – Touch key sensitivity adjustment

Recover Touch-Key Sensitivity

When assemble after disassembly, press number 86824 using remote control.

It means adjustment of the touch-key’s sensitivity to optimize in the current environment.

1 : Open tray mode.

2 : Press number 86824 using remote control.

3 : Verify the message on front display then automatically close tray.

4 : Press the ENTER button to complete.

Deck Adjustment

When assemble after disassembly, press number 235878 using remote control It means the function to reset pick-up condition through auto adjustment of loader.

 1 : No disc mode.

 2 : Press number 235878 using remote control.

 3 : Verify the message ‘Adjusting’ on screen.

 4 : Open tray. And then, insert single sided Blu-ray Disc.

 5 : After playback, insert single sided DVD disc.

 6 : Eject disc after playback then complete.

Verification of Deck Adjustment information
Press button 235879 using remote control.
And then, you can see this message.

Cold Start Method (initialize setup)

This is useful for forgotten Parental Lock password.

Press Next on the front panel for over 5 seconds while 'no disc' status.

VFD sign : RESET

How to check Firmware version
Method 1
 1 : open the tray.
 2 : press and hold INFO button on the remote over 5 seconds.
Method 2
Press 'MENU' on the remote controller.
Setup – System Setup – System Information.
Front : Front Micom F/W
S/W : Blu-ray Disc, DVD, CD, Main (Uneatable)
Loader : Loader F/W (Uneatable)
Region : BD region code / DVD region code.

Update methods

USB Update

The file type of firmware is RUF.

If the firmware file is compressed ZIP or RAR the file should be uncompressed to RUF file.

CD Update

The file type of firmware is ISO.

If the firmware file is compressed ZIP or RAR the file should be uncompressed to CD image file ISO.

Firmware  Update Method by USB flash drive

How to prepare F/W Update file via USB flash drive

If the firmware file is compressed , the file should be uncompressed to RUF file. 

Connect a USB flash drive to your computer.

If there are previous versions of RUF file on USB flash drive, delete them.

Copy the new RUF file to USB flash drive.

How to upgrade the BD-P1600

Remove any Disc, the display should read "No Disc."

Insert USB flash drive into the USB Host jack.

Please wait while verifying.

After sometime, you will see "Yes/No" menu.

Press the 'Enter' button to choose 'Yes' if the version is a later version than the current one.

Wait about 2 to 3 minutes.
When finished, the power will turn off automatically.

Remove the USB flash drive.

Firmware  Update Method by CD
How to make an upgrade CD
If the firmware file is compressed ZIP, the file should be uncompressed to CD image file ISO.
Please burn the CD image file on a blank CD-R/RW disc.
How to upgrade the BD-P1600
Insert the update CD and close the tray.
Please wait while verifying.

After a while, the tray will open and you will see 'Yes/No' menu.
Press 'Enter' button to choose 'Yes' if the update CD you inserted is a later version than the current one.

Remove the update CD from the Disc Tray.
Wait about 2 to 3 minutes.
When finished, the power will turn off automatically.

Back-light inverter faults for LCD monitors

LCD Monitor Back-light Inverter – Common faults

For a newer LCD Monitor design, the inverter board is joining together with the power board. Older LCD Monitor has the inverter board separated from the power board.

There are four types of inverter designs used in the LCD Monitors.
1) Buck Royer inverter
2) Push pull inverter (Direct Drive)
3) Half bridge inverter and (Direct Drive)
4) Full bridge inverter (Direct Drive)
Number 2, 3 and 4 are called Direct Drive because it eliminates the need for the inductor (buck choke) and resonant capacitors found in a conventional Royer Oscillator. In other words, Direct Drive architecture reduces component count, lower production cost and most importantly improved transformer designs that optimize performance.

1. Buck Royer Type Inverter

In order to drive the Backlights (CCFL lamps) embedded in the panel module, an inverter circuit is required to convert the 12 volt DC up to hundreds or even a thousand plus AC voltage output. The inverter is formed by symmetric circuitry, in order to drive the separate lamp modules. The input stage (buck converter circuit) consists of Inverter IC (PWM IC), Buck P-channel FET, Buck Choke and Buck Diode. The Buck converter circuit converts a DC voltage to a lower DC voltage. The other stage consists of a tuning capacitors, high voltage transformer, and push-pull transistor pair to boost ac output to hundreds of voltage.

The ballast capacitor controls current amplitude through the lamp negative impedance by dropping an approximately equal voltage across its positive impedance. The feedback circuit is for protection purposes and will shut down the inverter IC just in case if the high voltage produced by the high voltage transformer exceeded the normal value and also it can detect bad or a flicker backlights. The inverter IC also used to control the brightness of the CCFL lamps. The AC frequency of the high voltage transformer is typically run at 30 to 70 KHz. The higher the frequency, the greater is the light output.
Note: Some LCD Monitor design has the Buck type P-channel FET integrated into an IC thus in order to successfully testing them you can use the comparison method with another known good FET (comparing the ohms value between pins) or by using the Peak Atlas Analyzer test equipment. The IC can be in Dual in Line package or SMD type.

The common Buck P-channel FET is FU9024N, J598 and etc. The SMD FET IC’s are 4431, BE3V1J and etc. The common push pull transistors part numbers are C5706, C5707 and etc.

2. Push Pull Inverter (Direct Drive)

The push pull inverter shown above when Q1 switches on, current flows through the 'upper' half of T1's primary and the magnetic field in T1 expands. The expanding magnetic field in T1 induces a voltage across T1 secondary. When Q1 turns off, the magnetic field in T1 collapses and after a period of dead time (dependent on the duty cycle of the PWM drive signal), Q2 conducts, current flows through the 'lower' half of T1's primary and the magnetic field in T1 expand. Now the direction of the magnetic flux is opposite to that produced when Q1 conducted. The expanding magnetic field induces a voltage across T1 secondary. After a period of dead time, Q1 conducts and the cycle repeats. The above diagram only showing a single channel IC that is driving the Q1 and Q2. Some inverter IC can have two channels in order to drive two high voltage transformers. Each output from the transformer can drive more than one lamp.

3. Half Bridge Inverter (Direct Drive)

The half bridge inverter is similar to the push pull inverter, but a centre tapped primary is not required. The reversal of the magnetic field is achieved by reversing the direction of the primary winding current flow. This type of inverter is found in many LCD Monitor too. The control circuit of a half bridge inverter is similar to that of a push-pull inverter. This design has optimal utilization of transformer core and primary winding (one vs. two for push pull). The above diagram only showing a single channel IC that is driving the Q1 and Q2. Some inverter IC can have two channels in order to drive two high voltage transformers.

Each output from the transformer can drive more than one lamp

4. Full Bridge Inverter (Direct Drive)

The full bridge inverter is similar to the push pull inverter, but a centre tapped primary is not required. The reversal of the magnetic field is achieved by reversing the direction of the primary winding current flow.

This type of inverter is found in many latest LCD Monitors. Diagonal pairs of transistors will alternately conduct, thus achieving current reversal in the transformer primary. This can be illustrated as follows - with Q1 and Q4 conducting, current flow will be 'downwards' through the transformer primary and with Q2 and Q3 conducting, and current flow will be 'upwards' through the transformer primary. The control circuit monitors V out and controls the duty cycle of the drive waveform to Q1, Q2, Q3 and Q4. The control circuit operates in the same manner as for the push-pull inverter and half-bridge inverter, except that four transistors (FET) are being driven rather than two. In some LCD Monitor like the HP1703 that uses the OZ960 inverter IC, the output from inverter IC can parallel out to drive another high voltage transformer.

The full bridge inverter design has 4 IC’s (each IC have two FET (N and P channel)) in it. Two IC’s were used to drive each high voltage transformer.

The dual N and P channel PowerTrench Mosfet IC can be in SMD type or Dual in Line package

Common Faults 

1) Dry Joints (Very common in the buck choke and high voltage transformer pins)

2) Shorted or burnt high voltage transformers
3) Shorted or leaky push pull transistors
4) Capacitance value problems
5) Shorted buck P-channel FET
6) Inverter Pico fuse open circuit or turned high ohm
7) Ballast capacitors value out causing shutdown and brightness fluctuate
8) Burnt pins or loose connection in the backlights connector
Some common part numbers for inverter IC’s are TL1451ACN, 0Z960, 0Z962, 0Z965, BIT3105, BIT3106, TL5001 and etc.

Sanyo DC DA90 – Micro Component System - circuit diagram and adjustments

If the operation of the unit or display is not normal,
1. Disconnect the mains lead.
2. Press the BAND button (main unit) for at least 30 seconds.
3. Connect the mains lead.
4. Operate the unit.

CD PICK-UP MAINTENANCE
About pick-up (Optical lens) Cleaning
Clean a lens with swab of the cotton which moistened it with alcohol, cleaning paper or cleaning disc appointed.
Specified cleaning disc: LC-1 (Part code : 645 026 1961 ..... manufactured by SANYO.)
Show a clean procedure in the following in reference by swab of cotton.
1. Cotton swab is wrapped with cleaning paper.
2. Add the isopropyl alcohol.
3. Gently move the tip of cotton swab just like a draw a whirlpool from inside to outside on the surface of lens.

CD PLAYER ADJUSTMENTS
Confirm the tracking balance
1. Turn on the POWER switch.
2. Connect an Oscilloscope to TP2 (TE) and TP4 (VC).
3. Set the test disc.
4. Press "PLAY" button to turn into the "PLAY" mode.
5. Keep holding "SKIP" button down so as to be "SERCH" mode, then confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to 0V (VC)

Checking the "eye" pattern

1. Switch "ON" the POWER.

2. Connect an oscilloscope to TP1 (RF) and TP4 (VC).

3. Load the test disc.

4. Press the PLAY button.

5. Check to be sure that the "eye" pattern is at the center of waveform and that the diamond

shape is clearly defined.

6. Press the STOP button.

7. Turn off the POWER switch.

Replacing the head
1. After replacement, demagnetize the heads by using a degausser.
2. Be sure to clean the heads before attempting to make any adjustments.
3. Be sure both channels (1 and 2) are the same level.
(Using a dual-channels oscilloscope).
4. All wiring should be returned to the original position after work is completed

Adjusting head azimuth
1. Load a test tape (VTT-738, etc. :10kHz) for azimuth adjustment.
2. Press the PLAY button.
3. Use a cross-tip screwdriver to turn the screw for normal azimuth adjustment so that the left and right outputs are maximized at the same phase during normal playback.
4. Press the STOP button

Replacing the motor
c. Adjusting motor speed
1. Insert the test tape (MTT-111 or etc. 3,000 Hz).
2. Press the PLAY button.
3. Use a flat-tip screwdriver to turn the SVR to adjust so that the frequency counter becomes 3,000 Hz.
4. Press the STOP button.

Exploded view of CD and Tape mechanism

Schematic-Front

Schematic-CD

Schematic-tuner

Schematic-Amp

Amplifier-PWBA

Output power ......................... 4 W x 2
(at 4 ohms, 10% distortion)
Outputs .................................. SPEAKERS : 4 ohms
PHONES : 8 - 32 ohms
Power requirements............... AC 230V, 50Hz
Power consumption ............... 17 W

Speaker system
Type ....................................... Full range bass reflex
Unit used................................ 8 cm cone type
Maximum power-handling capacity ..... 6 Watts (peak)
Nominal impedance ............... 4 ohms