REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 6 February 2019

YAMAHA PDM4220 PLASMA DISPLAY – HOW TO ENTER ADJUSTMENT MODE LED BLINKING CODES

Yamaha PDM4220 Plasma Display – How to enter adjustment Mode LED Blinking codes

Error Codes, LED Blinking Codes, Sustain Board replacement procedure, Self diagnosis, Fault symptom details, Service Mode and more ..... Yamaha PDM4220 Plasma Display
Self-Diagnosis Function
This chassis has 2 modes of self-diagnosis function.
(1) PDP panel check mode: It indicates the one latest record of the PDP panel failure with blinking of the power indication light (LED).
(2) Signal circuit check mode: It indicates the check result on some points of the signal circuit and the history of them with On-Screen Display (OSD).
PDP panel self-diagnosis function
This function is for a PDP panel failure with no picture.
To enter to this Self-Diagnosis mode, follow the next steps:
1) The Power Cord should be connected to AC line and the Main Power switch should be turned on.
2) Turn the power off by the SUB-POWER( ) button of the monitor or the remote control.
Procedure
1) Press the SUB-POWER button and button on the bottom of the monitor at the same time, and keep it for more than 5 seconds after the power turned on.
2) It generates red blinking series of the power indicator light.
3) Any operation would cancel the Self -Diagnosis mode.
4) The next table shows the PDP PWB in which failure most probably would be allocated according to the number of blinks.
Blinking Codes
Signal circuit self-diagnosis function
This function is for the failure of the signal circuit, for example the phenomenon as below:
"Sometimes power turns off abnormally." "Sometimes picture disappears abnormally."
To enter to this Self-Diagnosis mode, follow the next steps
1) The Power Cord should be connected to AC line and the Main Power switch should be turned on.
2) Turn the power off by the SUB-POWER( ) button of the monitor or the remote control.
Procedure:
1) Press the SUB-POWER( ) button and button on the bottom of the monitor at the same time, and keep it for more than 5 seconds after the power turned on.
2) The monitor will be turned on, and it will display On-Screen Display of the Self-check result and the failure history as below.
3) Any operation would cancel the Self -Diagnosis mode.
4) The following table shows the OSD symbols and contents of failure PWB in which failure most probably would be allocated according to the number of blinks.
If you clear history of failure, make FACTORY RESET: enter the factory setting mode; press the SUB-POWER button, INPUT SELECT  button and [UP]button on the bottom of the monitor at the same time. And keep it for more than 5 seconds after the power turned on.
PWB Locations
Fault Symptoms
Click on the pictures to zoom in
How to replace the X-Sustain board
When removing the circuit board after the main power is turned on/off, wait for at least one minute before starting to remove the circuit board.  If the circuit board removal is started immediately after turning off the main power, it can result in electric shock or damage to the circuit due to residual electric charge.
(1) Remove the fixing screws (M3x8) fixing XBB at 4 locations.
(2) Pull out the XBB board horizontally and disconnect the connectors (CN24, CN25).
(3) Release the lock of the FPC connector (CN21) and disconnect the signal cable.
(4) Disconnect the cables from the VH connectors (CN22, CN23).
(5) Remove the fixing screws (M3x8) fixing XSUS at 5 locations and rod at 2 locations.
(6) Remove the X-SUS board.
Make sure that you do not to hold the heat sink when removing the X-SUS board.
[On handling the FPC connect or To release the lock, release it by gently flipping it with the nail of the thumb or forefinger.  Never pinch the lock lever with fingers or hook on it (especially with a fingernail). Doing so might damage the lock lever.]
How to replace the Y-Sustain board
When removing the circuit board after the main power is turned on/off, wait for at
least one minute before starting to remove the circuit board.
If the circuit board removal is started immediately after turning off the main power,
it can result in electric shock or damage to the circuit due to residual electric
charge.
Remove the circuit board by following the steps below. To install the circuit board, reverse the
Removal procedure.
(1) Remove the fixing screws (M3x8) fixing SDM at 6 locations.
(2) Pull out the SDM board horizontally and disconnect the connectors (CN34, CN35).
(3) Release the lock of the FPC connector (CN31) and disconnect the signal cable.
(4) Disconnect the cables from the VH connectors (CN32).
(5) Remove the fixing screws (M3x8) fixing YSUS at 5 locations and rod at 2 locations.
(6)Remove the Y-SUS board. Make sure that you do not to hold the heat sink when removing the Y-SUS board.
On handling the FPC connect or To release the lock, release it by gently flipping it with the nail of the thumb or forefinger.  Never pinch the lock lever with fingers or hook onto it (especially with fingernails). Doing so might damage the lock lever.
How to replace the Logic board
Remove the circuit board by following the steps below. To install the circuit board, reverse the removal procedure.
(1) Disconnect the EH connector CN6.
(2) Release the lock of the FPC connectors CN2, CN3 and disconnect the signal cable (FPC).
(3) Remove the screws (M3x8) fixing the shield Plate in position at 4 locations.
(4) Remove the screws (M3x8) fixing the LOGIC board in position at 2 locations.
(5) Remove the LOGIC board.
(6) When installing the LOGIC board, place it so that the LOGIC board is locked by the tabs for fixing it in position (at 3 locations).
On handling the FPC connect or to release the lock, release it by gently flipping it.  Never pinch the lock lever with the fingers or hook onto it (especially with fingernails).  Doing so might damage the lock lever.
How to get to Adjustment mode [The Service Mode]
* Using the front control buttons with the set turned off (standby) can activate it.
* Press the SUB-POWER button, INPUT SELECT button and button at the same time, and hold for more than 5 seconds.
* The set turns on in adjustment mode with OSD.
Changing data and Selecting Adjustment Mode
# When the set is in adjustment mode, the cursor Left/Right, Up/Dn and OK buttons of the remote control or front panel may be used as the adjustment keys.
# Up/Dn buttons are used for selecting adjustment code.
# Left / Right buttons are used for changing data values.
# OK button is used for confirming the data.
# After finishing the necessary adjustment press MENU button. 
Adjustment mode is released and the set returns to normal condition. {Exit from the Service Mode}
Memory Initialize operation
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore, adjustment data will be lost.
(1) Enter Adjustment Mode.
(2) Select MEMORY INIT adjustment code (No.658) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button for more than 3 seconds.
(4) Select No.525 and change data value from 1 to 0.
(5) Check that the receiving channel goes to P1. Unit is set to preset values.
Readjustment Power supply voltage (This adjustment is a must for any brand Plasma TV; if its Display Panel or its Power supply board [SMPS] is exchanged.)
When a PANEL or a Power Unit is exchanged, power supply voltage needs to be adjusted. Adjust to make the values of Va and Vs of as should on the label [Silk Screen] currently stuck on the panel back upper parts. Adjustment is performed by VR in the power [SMPS] supply unit
Posted By: FRANK at 05:22
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