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

SANYO - LCD 42XR7H _ SERVICE MODE _ ADJUSTMENTS

SANYO - LCD 42XR7H _ SERVICE MODE _ ADJUSTMENTS







SERVICE MODE ENTRY


  • The method of entering the factory menu is SOURCE, 2, 5, 8, 0.
  • Press 1 to enter page1, the function is Cotez Feature Setting, to set LOGO, frequency ect,.
  • Press 2 to enter page2, the function is Color Temperature Setting. The color temperature now is 12000.
  • Press 3 to enter page3, the function is Auto Color setting, to set AUTO COLOR of each channel.
WRITING PROGRAM

  • Connect X401 of main board and IR board, insert 11-pin wire of power board to XB7, then the indicator light of IR board should be red.
  • Press POWER on the remote control, now the indicator light of IR board turns blue, test XB7 PIN1 to be 9V, PIN3 5V, PIN5/PIN6 12V, PIN9 3.3V, LB04 3.3V, NS03 PIN2 1.8V, N404 PIN2 2.5V.
  • Connect PC and serial terminal, flash write HDCP KEY.
TV BOARD ADJUSTMENT


IF amplify adjustment

  • (Base on 3.3 a), connect 6-pin wire of power board and X04 of TV board, press POWER on the remote control, now the indicator light of IR board turns blue, TEST PIN2 of X04 to be 5V, PIN4 9V, L07 3.3V.
  • Input +5V to TP1 and 0V to TP2, input 38.9m IF signal to J1(use IF signal generator), adjust L10 to let X08 be 1.6V.
  • Input 0V to TP1 and +5V to TP2, input 33.5m IF signal to J1(use IF signal generator), adjust RP01 to let X08 be 1.6V.
  • Joint the tuner J1.
UNIT CONNECT ADJUSTMENT

  • Connect the main board, TV board, IR board, SCART connect board and key board according to the wiring diagram. Press POWER button on the remote control, the indicator light on IR board turns blue, test X12 PIN1 of TV board to be +24V.
AGC ADJUSTMENT

  • Receive 60dB signal of D-8 and test X07 with DC voltmeter.
  • Adjust RP201 to let the data of voltmeter just below 4.0V.
  • Input 100dB signal of antenna, the picture should not no-synchronous or distortion; the color should not disappear when input 30dB-40dB low signal and the picture should synchronous and the sound normal.
VGA ADJUSTMENT

Mode preset
  • Input VG-848 of VGA signal(PATTERN 980:1 dot ON/OFF), select TIME877(720*400/70Hz), the TV will auto adjust to full screen, or enter display menu to do auto correction.
  • Adjust TIME885(640*480/60Hz,TIME854(800*600/60Hz) by using the same method.
VGA CHANNEL AUTO-COLOR
  • Input VG848 of VISA mode signal to VGA channel, enter factory menu of Auto Color Setting item, select VGA and press enter to do Auto Color.
YPbPr AUTO COLOR

  • Input a high definition signal of VG-848, enter factory menu of Auto Color Setting item, select YpbPr and press enter to do Auto Color.
AV AUTO COLOR
  • Input FLUKE VIDEO signal of PAL, select PATTERN of 100% Color bar, enter factory menu of Auto Color Setting item, select VIDEO1 and press enter to do Auto Color.
SCART AUTO COLOR

  • Connect SCART1 RGB signal, input FLUKE signal of PAL system, PATTERN of 100% Color bar, enter factory menu of Auto Color Setting item, select SCART1 and press enter to do Auto Color.
Posted By: FRANK at 02:57
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