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 !

Saturday, 9 February 2019

SONY WEGA TRINITRON _ KV-34FV310 _ KV 38FV310 _ SERVICE MODE _ ADJUSTMENTS

SONY WEGA TRINITRON _ KV-34FV310 _ KV 38FV310 _ SERVICE MODE _ ADJUSTMENTS





SETTING SERVICE MODE

  • Standby mode (Power off).
  • Press the following buttons on the remote commander within a second of each other: [DISPLAY à Channel 5 à  Sound Volume + à Power]
  • Press [1] or [2] on the Remote Commander to select the item.
  • Press [3] or [6] on the Remote Commander to change the data.
  • Press MUTING then ENTER to write into memory.
  • Press [8] then ENTER on the Remote Commander to initialize.
  • Carry out Step 1 when adjusting ID’s 0-7 and when replacing and adjusting IC003.
  • Press MUTING then ENTER to write into memory.
  • DO NOT turn off set until SERVICE appears
MEMORY WRITE CONFIRMATION METHOD
  1. After adjustment, pull out the plug from the AC outlet, then replace the plug in the AC outlet again.
  2. Turn the power switch ON and set to Service Mode.
  3. Call the adjusted items again to confirm they were adjusted.
SUB CONTRAST ADJUSTMENT [RDRV]
  1. Input a color-bar signal and set the level to 75%.
  2. Set in Pro mode.
  3. Activate the Service Adjustment Mode.
  4. Set GON and BON items. Using 3 and 6 set each to the following values. Leave RON set to “1”.
  5. Select SCON with 1 and 4 .
  6. Connect an oscilloscope probe to C Board, CN705 Pin 3 Blue Out.
  7. Adjust the value of SCON with 3 and 6 for 1.90 ± 0.01Vpp.
  8. Reset GON and BON values to “1”.
  9. R ON: ON (1):  G ON: ON (1):  B ON: ON (1)
  10. Press MUTING then ENTER to save into the memory.
  11. After adjusting SCON, if still out of xpec, use RDRV resistor as a fine adjustment.


WHITE BALANCE ADJUSTMENT:  White balance should be adjusted after Sub Contrast because RDRV is also used in Sub Contrast Adjustment.
  1. Set program palette to STANDARD and push RESET.
  2. Input an entire white signal.
  3. Set to Service Adjustment Mode.
  4. Set the PICTURE and BRIGHT to minimum.
  5. Adjust with SBRT if necessary.
  6. Set RCUT to “14”.
  7. Select GCUT and BCUT with 3 and 5.
  8. Adjust by pressing 1 and 4 for the best white balance.
  9. Set the PICTURE and BRIGHT to maximum.
  10. Select GDRV and BDRV with and .
  11. Adjust with 3 and 6 for the best white balance.
  12. Write into the memory by pressing 3 then 5.

Repeat steps 1-12 for GDR4, BDR4, GCU4 and BCU4 using Video 4 input
Posted By: FRANK at 01:30
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