LG LHB655NW Troubleshooting, software update, system reset and more-3D Blu-ray DVD Home Theater System

 

LG LHB655NW (LHB655NW, S63T2-S, S63S2-C, S63T1-W, W4-2)

Total power Total:  1000W

Signal system: NTSC-PAL color TV system

Hidden key modes

MPEG HIDDEN KEY  and MICOM HIDDEN KEY mode

FIRMWARE UPDATE

COPY AN UPDATE FILE TO A MEDIA (USB OR CD-ROM)
Update File Name: LG_HB_A100M63.ROM
1) An update file have to be copied onto the root of file system.
2) USB and CD-ROM are able to use firmware update.

Insert USB or CD-ROM which has an update file.
2) OSD responds to the insertion event.
3) OSD is shown as below.

Caution:
Do not turn off the power during the software update.
Note:
If the software includes the driver update, disc tray may open during the process.

AFTER UPDATE COMPLETE
1) When update is completed, the power will be turned off automatically in a few seconds.
2) Turn the power back on. The system now operates with the new version.

NETWORK SOFTWARE UPDATE

Network update notification
From time to time, performance improvements and/or additional features or services may be made available to units that are connected to a broadband home network. If there is new software available and the unit is connected to a broadband home network,  the player will inform you about the update as follows.
Option 1:
1. The update menu will appear on the screen when you turn on the player.
2. Use [> / <] to select a desired option and then press ENTER

[OK] > Starts the software update

[Cancel] > Exits the update menu and the home appears

Option 2:
If the software update is available from the update server, the “Update” icon appears in the Home menu. Press blue (B) colored button to start the update procedure.

Software update
You can update the player using the latest software to enhance the products operation and/or add new features. You can update the software by connecting the unit directly to the software update server.
Note:
• Before updating the software in your player, remove any disc and USB Device from the player.
• Before updating the software in your player, turn the player off and then turn it back on.
• During the software update procedure, do not turn off the player or disconnect AC power, or do not press any button.
• If you cancel the update, turn off the power and turn it on for stable performance.
• This unit cannot be updated to previous software version.
1. Check the network connection and settings.
2. Select [Software] option in the [Settings] menu then press ENTER .
3. Select [Update] option, and press ENTER

The player will check for the newest update.
Note:
• Pressing ENTER while checking for the update will end the process.
• If there is no update available, the Message, “No update is found.” appears. Press ENTER to return to the [Home Menu].
4. If newer version exists, the message “A new update was found. The update takes a few minutes. Do you want to update?” appears.
5. Select [OK] to start update.
(Selecting [Cancel] will end the update.)
6. The player starts downloading the newest update from the server. (Downloading will takes several minutes depending on your home network condition)

7. To update software the next time, the software update procedure has to be started from the beginning again.
Caution:
Do not turn off the power during the software update.
Note:
If the software includes the driver update, disc tray may open during the process.
8. When update is completed, the power will be turned off automatically in a few seconds.
9. Turn the power back on. The system now operates with the new version.
Note:
The Software Update function may not work properly depending on your internet environment. In this case, you can obtain the latest software from the authorized LG Electronics Service Center then update your player.

Troubleshooting

NO POWER PROBLEM
No power problem occurs when you power on the unit.
1-1. Fuse & Bridge diode
1-1-1. Solution
Replace F901, BD901 on SMPS board.
1-1-2. How to troubleshoot (Countermeasure)
1) Look at the physical of fuse F901.
2) Check the bridge diode BD901.

No power problem occurs when you power on the unit.
1-2. VFD, 14 VA, 5.5 VA
1-2-1. Solution
Replace D922, D923, D924, D925, D926, D927, IC901.
1-2-2. How to troubleshoot (Countermeasure)
Case 1) FLD abnormal: Check D950, D951, ZD951, ZD952, FR950 and replace it.
Case 2) 5.5 VA abnormal: Check D952, D953 and replace it.
Case 3) 14 VA abnormal: Check D955, D956 and replace it.
Case 4) All voltage abnormal: Check IC901 and replace it.

NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE ON FRONT PANEL
When you turn on your set, it will blank / no message on front panel, and stand-by led no working.
2-1. IC155 (No 3.3 VA)
2-1-1. Solution
Replace IC155 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 VA of IC101.
2) If 3.3 VA is abnormal, please check 5.5 VA of IC155 pin1.
3) If 5.5 VA is OK, but 3.3 VA is abnormal, replace IC155.

When you turn on your set, it will blank / no message or Welcome on front panel, and it will not boot-up.
2-2. IC156 System 3.3 V (No System 3.3 V)
2-2-1. Solution
Replace IC156 on MAIN board.
2-2-2. How to troubleshoot (Countermeasure)
1) Please check 5.5 VA of IC156 pin3 (VIN).
2) If 5.5 VA is abnormal, please check SMPS 5.5 VA.
3) If 5.5 VA is OK, but 3.3 V is abnormal at the IC156 pin6 (VOUT), replace IC156.

When you turn on your set, it will blank / no message or Welcome on front panel, and it will not boot-up.
2-3. IC151 (No 1.2 V & 1.5 V)
2-3-1. Solution
Replace IC151 on MAIN board.
2-3-2. How to troubleshoot (Countermeasure)
1) Please check 1.2 V & 1.5 V of IC151 on MAIN board.
2) If 1.2 V voltage doesn’t come out, check IC151 pin22 (VCC 5.5 VA).
If 1.5 V voltage doesn’t come out, check IC151 pin9 (VCC 5.5 VA).
If there is no 5.5 V, please check 5.5 VA from SMPS.
3) If 5.5 VA input is normal, first of all check DC15_12_CTRL is high (IC101 pin24).
If DC15_12_CTRL is high, check R159 and if there’s no defective component then please replace IC151.
4) After changing it, if the set is still not booting :
- Check 1.2 V, 1.5 V, 3.3 V is normal. (please refer to other sections of this guide)
- Check Crystal X501 refer to item 2-4.
- Check NAND Flash IC (IC503) refer to item 2-5.
- Check DDR IC (IC502) refer to item 2-6.
- Check MT8563 IC (IC501) refer to item 2-7.

When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally.
2-4. X501
2-4-1. Solution
Replace X501 on MAIN board.
2-4-2. How to troubleshoot (Countermeasure)
1) Please check the soldering status of 27 MHz crystal (X501).
2) Please check the frequency of 27 MHz crystal (X501).
3) If the crystal doesn’t oscillate, replace X501.
4) After changing it, if the set is still not booting :
- Check NAND Flash IC (IC503) refer to item 2-5.
- Check DDR IC (IC502) refer to item 2-6.
- Check MT8563 IC (IC501) refer to item 2-7.

When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally.
2-5. IC503 (NAND FLASH MEMORY)
2-5-1. Solution
Replace IC503 on MAIN board.
2-5-2. How to troubleshoot (Countermeasure)
1) Please check physical status of IC503 on your eyes.
2) Check the VCC (3.3 V) of IC503 and if it’s normal, please replace IC503.
(Please make sure IC503 has proper program.)
3) After changing it, if the set is still not booting :
- Check DDR IC (IC502) refer to item 2-6.
- Check MT8563 IC (IC501) refer to item 2-7.

When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally.
2-6. IC502 (DDR3 MEMORY)
2-6-1. Solution
Replace IC502 on MAIN board.
2-6-2. How to troubleshoot (Countermeasure)
1) Please check 0.75 V of DDR3_VREF. (between C5C2 and R5C3)
Please check 1.5 V of IC502.
2) If it doesn’t work even though IC151, IC156 are no problem,
IC502 (DDR memory) could have problem.
3) After changing it, if the set is still not booting :
- Check MT8563 IC (IC501) refer to item 2-7.

When you turn on your set, it will display “WELCOME” on front panel, and it will not boot-up normally.
2-7. IC501 (MPEG IC)
2-7-1. Solution
Replace IC501 on MAIN board.
2-7-2. How to troubleshoot (Countermeasure)
1) Please Check 1.2 V of C551 on MAIN board.
Please Check 3.3 V of C536 on MAIN board.
Please Check 1.5 V of C554 on MAIN board.
2) If it doesn’t work even though IC151, IC156 are no problem,
IC501 MT8563 could have problem.

WIRED NETWORK CONNECTION ERROR
When you connect online service (like You-tube or Netflix2.1) through the wired LAN,
the “no connection“ message appears.
3-1. JK251 (ETHERNET JACK)
3-1-1. Solution
Replace JK251 on MAIN board.
3-1-2. How to troubleshoot (Countermeasure)
1) Check you internet connection. Make sure it connect properly to modem or router.
2) If internet connection OK, please check the Ethernet Jack (JK251).
3) If there is soldering problem, please re-soldering pin JK251.
4) If after re-soldering problem still occurs, replace JK251.
5) If problem still occurs after change JK251, check MT8563 IC (IC501). Refer to item 2-7.

BAD HDMI VIDEO / AUDIO OUTPUT
When unit is connected to HDMI TV using HDMI cable, picture shows bad color, no output or mixed
color on the screen. But component output is OK.
4-1. JK252 (HDMI JACK)
4-1-1. Solution
Replace JK252 (HDMI Jack).
4-1-2. How to troubleshoot (Countermeasure)
1) Check JK252 pin soldering.
2) If there is short soldering on pin JK252, re-soldering pin JK252.
3) If problem still occurs, check HDMI data.
- If all data OK, replace JK252.
- If data NG, check set on BD mode :
Replace IC501

NO AUDIO FROM SPEAKER
When unit is connected to speaker, no audio from speaker.
5-1. IC601 (PWM IC)
5-1-1. Solution
Replace IC601 (PWM IC).
5-1-2. How to troubleshoot (Countermeasure)
1) Check IC601 pin soldering.
2) If there is short soldering on pin IC601, re-soldering pin IC601.
3) If problem still occurs, check AMP IC (IC700, IC701, IC702).
- Check IC700, IC701, IC702 pin soldering.
- If soldering ok, check the AMP heat sink :
Replace IC700, IC701, IC702.

NO USB
When unit is connected to USB, no audio and video from SET.
6-1. IC501 (MT8563)
6-1-1. Solution
Change IC501 (MT8563).
6-1-2. How to troubleshoot (Countermeasure)
1) MAIN board : Check CN104 connector and FFC cable.
JACK board : Check CN202 connector.
2) If there is short soldering on CN104, re-soldering CN104.
If there is short soldering on CN202, re-soldering CN202.
3) If problem still occurs, check 5 V (CN104 pin11 ~ pin15).
- If no output, check MAIN board IC154.
- If OK, check D+, D- signal.
- If there is no signal, replace IC501

BT CONNECTION ERROR
When you connect Wireless connection(like mobile phone, multi-room SPK, etc) through the BT,
the “BT ERROR“ message appears.
7-1. BT module
7-1-1. Solution
Replace BT module on Main chassis.
7-1-2. How to troubleshoot (Countermeasure)
1) Check your BT device. Make sure that BT function is on-state.
2) If it is OK, please check the CN252.
3) If there is soldering problem, please re-soldering pin CN252.
4) If after re-soldering problem still occurs, replace BT module.
5) If problem still occurs after change BT module, check MT8563 IC (IC501). Refer to item 2-7

SA RESET procedure

PURPOSE
In order to insert the new SA adjustment values, it needs clearing SA initial values of the flash memory.
2. REQUIRED SA RESET
- After changing traverse.
- After changing main board assembly.
- After changing main board flash IC.
3. SA RESET PROCEDURE

Electrolux Distriparts DISHWASHER – How to enter service and user mode, electrical circuit diagram, table of programmes, electrical circuit, Alarms and LED flashes

 

SERVICE MODE
With this procedure it is possible to access the Service Diagnostics System. Once this mode is accessed, it is possible to:
• read and cancel the alarms
• control the operation of the various components of the appliance
• start the Service diagnostics mode
Reading the alarms and activating the individual components
To activate the function:
1) Press and hold down the button S1. T
2) Turn the knob anti-clockwise till Position 5:
* The LEDs LD0 and LD1 flash.
* Release button S1.
* Press button S1.
* the first memorised alarm is displayed: the End of cycle LED flashes and pauses: for the de-codification,
please refer to table of alarm codes.
4) Press again button S1 to display the second alarm.
5) Pressing button S1 again, the third alarm is displayed.
6) Pressing button S1 for the fourth time, the appliance
actuators are activated:
* 4th actuation: regeneration solenoid
* 5th actuation: drain pump
* 6th actuation: water fill solenoid (water up to level)
* 7th actuation: heating (only if water up to level)
* 8th actuation: washing pump
* 9th actuation: detergent/rinse-aid dispenser
* 10th actuation: drying fan
* 11th actuation: it starts again from the first alarm
All positions can be repeated pushing button S1 sequentially.

The components are powered with door closed. If button S1 is not pressed for 60 seconds, the diagnostics terminate automatically

Cancelling alarm codes from memory / test of LEDs
It is good practise to cancel the alarm memorised:
• after reading the alarm code, to check whether it is repeated during the diagnostics test.
• after repairing the appliance, to check whether it is repeated during the testing cycle.
To activate the function:
1) Press and hold down button S1.
2) Turn the knob anti-clockwise till Position 5:
* the LEDs LD0 and LD1 flash.
* release button S1.
3) Turn the knob till Position 4.
* Press button S1.
* All LEDs start to flash for 30 seconds.

Functional testing cycle
This is an abbreviated washing programme (50 min) which allows the Service Engineer to test all the functions that comprise a traditional washing cycle; in effect, the system simulates a normal cycle.
Selecting the cycle
To activate the function:
1. Press and hold down button S1.
2. Turn the knob anti-clockwise till Position 5.
* The LEDs LD0 and LD1 flash.
* Release button S1.
3. Turn the knob till Position 3
* press button S1.
* The programme starts: the programme behaves as in a normal cycle; the PAUSE and CANCEL options are accessible.

[At the beginning of the subsequent programme (i.e. after the test cycle), the resins are washed. The overall duration of the test cycle is about 50 minutes.]

Exiting Service and User modes
To exit these modes, turn the knob to OFF position and switch the appliance off or wait 60 seconds:
the LEDs light up and the appliance returns to selection mode.

Electrical circuit diagram and table of programmes

TABLE OF PROGRAMMES
The table below lists the phases of the programmes for this type of appliance. As these can be configured differently, refer to the relative documentation for the specific cycles available for each mode.

N.B.: The overall times for the programmes (duration) are approximate, and do not take into consideration the extra rinse, which may be selected as an option. The various phases do not include the times for regeneration/washing of the resins which, being performed “Ad Hoc”, are not carried at at every cycle.

CHECKING THE EFFICIENCY OF THE COMPONENTS
In order to facilitate the control procedure for the components to be tested, a TEST PROCEDURE has been created which indicates the point to which the probes of the tester should be applied and the correct theoretical value for each component tested.
* Remove the door and detach all the connectors from the main board.
* Connect the probes of the tester to the appropriate points on the connector. Compare the ohmic reading with the theoretical value.

Care should be taken relative to the position of connector "B1" - "B2": if this connector is replaced in the incorrect position (back-to-front), the appliance will not function since the power supply will be disconnected.

Measurement points on the board wiring connectors

The special functions.

The table below briefly describes how each of the special functions available to the user and to the Service Engineer can be used. To activate the user mode, the selector must be turned anti-clockwise.

ALARMS
When an abnormal situation occurs that may interfere with machine functioning, the main board activates a safety system which in most cases interrupts the washing cycle. The last three alarm situations are stored in memory. Using a special procedure, service personnel can display all the alarms stored in memory. The user is only shown four of the alarms in progress.
The END OF CYCLE LED flashes repeatedly.

Table of alarm codes

If it is not possible to access diagnostics mode, switch the appliance off and then on again to check that this is not caused by a temporary fault. Before replacing the circuit board, check that it is correctly powered by controlling the following
* Continuity of the power cable
* Correct operation of the suppressor
* Closure of the door switch contacts
* Continuity of the wiring between connectors on the circuit board and the suppressor.

USER MODE
With this procedure it is possible to:
• Modify the regeneration level selection (depending on the water hardness).
• Activate or deactivate the rinse-aid supply.
Regeneration selection
To activate the function:
1. Press and hold down button S1.
2. Turn the knob to Position 1:
* The LEDs LD0 and LD1 flash
* Release button S1
3. Press button S1
* The regeneration level is displayed by the End of cycle LED which flashes and pauses at intervals: for the de-codification, see summary table of alarms.
Press button S1 to increase the regeneration level according to the following values:

EAY62609601-LG 42PA4500-ZF SMPS and BBKLEM1961, LEM2261and LEM2961 SMPS audio output schematic

 

EAY62609601-LG 42PA4500-ZF SMPS 

Protection over Current, Under Voltage and Over Voltage conditions

The OCP test of STBY, 5.2V, M5V and 17V should setup current rise slew rate greater than 3.6A/S.
This Power Supply has above-mentioned protections.
The time for short shall be less than 10sec.
PSU should be shut down by under voltage protection when short circuit test
PSU should be wake up normally when AC off-on / Relay off-on / protection removal
Short circuit protection between different output terminals is not considered.
Trip point for over voltage indicates the operating point when the output voltage slowly increases.

AC Over-voltage Test
1) Over voltage shall test 315Vac~340Vac , Protection should be occur.
2) No fire, shock hazard or explosion shall occur.

Function of protection

Input Output PIN assignment

Schematic

BBK LEM1961 POWER BOARD schematic

Audio output schematic

Philips Trendset 20CT6555-78Z CIRCUIT DIAGRAM (Schematic) and PWB-CHASSIS CTO

 

Philips Trendset CRT TV - 20CT6555 -  Stereo sound

PWBs

Schematics [Circuit diagrams]

Toshiba 37AV502U LCD TV – service mode, firmware update, SMPS circuit diagram, troubleshooting, wiring diagram

 An isolation transformer should be connected in the power line between the receiver and the AC line before any service is performed on the receiver.

2. Always disconnect the power plug before any disassembling of the product. It may result in electrical shock.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network, etc.
4. Always keep tools, product components, etc. away from children as these items may cause injury.
5. Depending on the model, use an isolation transformer or wear suitable gloves when servicing with the power on.
Disconnect the power plug to avoid electrical shock when replacing parts. In some cases, alternating current is also impressed in the chassis, so electrical shock is possible if the chassis is contacted with the power on.
6. Always use the replacement parts specified for the particular model when making repairs. The parts used in products require special safety characteristics such as in-flammability; voltage resistance, etc. therefore, use only replacement parts that have these same characteristics. Use only the specified parts when the mark is indicated in the circuit diagram or parts list.
7. Part mounting and wire routing should be the same as that used originally. For safety purposes, insulating materials such as isolation tubes or tape are sometimes used and printed circuit boards are sometimes mounted floating. Also make sure that wiring is routed and clamped to avoid parts that generate heat or use high voltage. Always follow the manufactures wiring routes / dressings.
8. Always ensure that all internal wirings are in accordance before re-assembling the external casing after a repair is completed. Do not allow internal wiring to be pinched by cabinets, panels, etc. Any error in reassembly or wiring can result in electrical leakage, flame, etc., and may be hazardous.
9. NEVER remodel the product in any way. Remodelling can result in improper operation, malfunction, electrical leakage, or flame, which may be hazardous.
10. Always perform an AC leakage current check on the exposed metallic parts of the cabinet such as antennas, terminals, screw heads, metal overlays, control shafts, etc. to be sure that the set is safe to operate without any danger of electrical shock before returning the set to the customer.

Connector pin configuration

Internal wiring diagram

Firmware update

Firmware updating for this chassis family is accomplished via a USB port located on the rear of the unit. It is designated as “Service” and is located between the HDMI and PC audio input jacks.

The factory mode, necessary adjustments, and update procedures shown below can be accessed in this unit using the supplied remote control transmitter.  To access the factory mode, you must press “Left Arrow (<), Exit, Enter” in sequence on the remote transmitter. The mode can be exited by pressing exit or simply turning the unit off.

Troubleshooting tables:  Set dead – No or distorted video

No Backlight and No sound troubleshooting

SMPS (Power board) schematic