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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Monday, 25 February 2019

RCA - ATC 113 - ALIGNMENT PROCESS - SERVICE MODE


RCA - ATC 113 - ALIGNMENT PROCESS - SERVICE MODE



ERROR CODES

      If certain failures occurs in the chassis, error codes will be stored in the chassis EEPROM .  These error codes are displayed in parameters '1', '2'&'3'.  Parameter '1' stores the error code for the first failure experienced by the instrument.  Similarly, parameter '2' stores the error code for the second failure.  Parameter '3' automatically updated to display the error code for the most recent failure experienced by the instrument.

ERROR CODES.

         HEX,    DEC,    DEVICE,    CONDITION
  1. 00 => 0 => NO ERROR CODE THROWN.
  2. 03 => 3 => DETECTED BY MICRO => 12V RUN FAULT.
  3. 08 => 8 => T4-CHIP => XRP EVENT DETETED.
  4. 09 => 0 => T-4 CHIP => POWER ON RESET.
  5. 0A => 10 => F2PIP => POWER ON RESET.
  6. 0B => 11 => STEREO DECODER => POWER ON RESET.
  7. 10 => 16 => DETECTED BY MICRO => RUN 12C CLOCK OR DATA CLAMPED AT LOGIC STATE ZERO.
  8. 12 => 18 => DETECTED BY MICRO => STANDBY 12C CLOCK OR DATA CLAMPED AT LOGIC STATE ZERO.
  9. 2C => 44 => F2PIP => NO ACKNOWLEDGE FROM DEVICE.
  10. B0 => 176 => STEREO DECODER => NO ACKNOWLEDGE FROM DEVICE.
  11. B4 => 180 => THREE LINE COMB FILTER => NO ACKNOWLEDGE FROM DEVICE.
  12. 90 => 144 => VIDEO MATRIX SWITCH => NO ACKNOWLEDGE FROM DEVICE.
  13. C4 => 196 => MAIN TUNER => PLL BUS FAULT.
  14. C6 => 198 => MAIN TUNER => DAC BUS FAULT.
     The presence of a "0" in the error code value indicates that No Failure had occurred  since the last time the error code parameters were reset.  The error codes should be reset to "0" after servicing using "Vol+ | Vol- buttons.
Because, a failure of a bus IC is a possible reason for needing service, normal acknowledgement checking is disabled in the service mode.  If an IIC device has failed, its address will be stored in the error code area. 

EXITING SERIVCE MODE.

     Service mode can be exited at any time by pressing the Power Button.  New data is stored in the EEPROM when exits. 

X-Ray shutdown check.

  • Momentarily apply a short between the shut down test point [BL901-located at the back edge of the chassis near main tuner] and chassis ground (main tuner shield). The instrument should shut down immediately, then turn back ON after approx: 2seconds.
  • Apply and maintain  short between the shut down test point and chassis ground.  The instrument must shut down.  The instrument will attempt to restart several times, then remain Off. 
  • Remove the short from BL901.
  • Enter the service mode and reset the error code parameters to "0".
Posted By: FRANK at 02:21
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