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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Saturday 9 February 2019

SANYO CP21Y2 _ SERVICE MODE_MEMORY REPLACEMENT _ ADJUSTMENTS _ GRAY-SCALE ADJUSTMENT

SANYO CP21Y2 _ SERVICE MODE_MEMORY REPLACEMENT _ ADJUSTMENTS _ GRAY-SCALE ADJUSTMENT




ENTERING INTO SERVICE MODE

  • Press and hold the MENU button on the Remote Control and press the VOLUME (+) button on the TV set.
  • Select item by pressing the TIMER (Item No. UP) or SOUND MUTE (Item No. DOWN) button on the remote control handset.
  • Adjust data value by pressing the VOLUME + or VOLUME - button on the remote control handset.
To return to normal TV mode, press the MENU button on the TV set or the remote control handset.

MEMORY REPLACEMENT _ ADJUSTMENTS

The CPU (IC201) and memory IC (IC801) store the service adjustments data and controls data for each circuit.When the Memory IC(IC801) is replaced, some of the service adjustments should be readjusted to obtain the best performance. The necessary service adjustments are carried out by using the RC handset.

 INITIALIZATION PROCEDURE
  1. Put a new memory IC.
  2. Turn on the TV set.
  3. Press and hold the TV/AV Selector on the TV set for more than 2 seconds. The following picture appears on the screen.
  4. Press the PROGRAMME UP on the TV set while the above On-Screen Display is still on the screen.
  5. Switch off the TV set by pressing the Power Switch button on the TV set while the above On-Screen Display is still on the screen.  This completes the initialization of memory IC.
Following shows the initialized contents of memory data by this procedure

Plug & play
Inhibit data
Ch skip data
Sound volume data
Volume Lock
Colour system
No executed
Cancelled
Cancelled
10/63 steps
OFF
AUTO

REQUIRED SERVICE ADJUSTMENTS

GRAY-SCALE ADJUSTMENT
  1. Receive a monochrome circular pattern.
  2. Set the brightness and colour to normal, contrast to maximum.
  3. Enter to the service mode.
  4. Select No. 30 RBIAS (Red Bias), No, 31 GBIAS (Green Bias), and No. 32 BBIAS (Blue Bias) and set each data to 0 by pressing the VOLUME + or - key.
  5. Select No. 33 RDRIV (Red Drive) and No. 35 BDRIV (Blue Drive) and set each data to 64 by pressing the VOLUME + or - key.
  6. Turn Screen Control on the FBT (T471) to minimum (fully counter-clock-wise).
  7. Select No. 36 (1-line appear).
  8. Advance Screen Control clockwise to obtain just visible one colour line. If line does not appear, place this control to maximum (fully clockwise).
  9. Raise each Bias Level with 1, 2, 5, 6, 9 and 0 keys to obtain just visible white line.Select No. 37 DRV (Drive Adjustments).
  10. Adjust Red and Blue Drive Levels alternately with 3, 4, -/-- or RECALL key to produce normal black and white picture in highlight areas.
  11. Check for proper grayscale at all brightness levels. To turn off the TV Service Menu display, press the MENU key.
Readjust the following service adjustments

ADJUSTMENTS

RF AGC
Horizontal center
Vertical Position
Vertical linearity
Vertical-S correction
Gray scale
VICE MODE NO. & ITEM

Item 01, RF AGC
Item 02, H-PHA
Item 04, V-SHIFT
Item 06, V-LIN
Item 07, V-SCO
Item 30-33, 35-37
Posted By: FRANK at 02:55
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