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 !

Monday, 25 March 2019

JVC AV-21D10 /AV-21D10/AU / AV-21DM10 /AV-21DM10/-A / AV-2134EE /AV-21DTG2/-A - SERVICE MODE & ADJUSTMENTS

JVC AV-21D10 /AV-21D10/AU / AV-21DM10 /AV-21DM10/-A / AV-2134EE /AV-21DTG2/-A - SERVICE MODE & ADJUSTMENTS



ADJUSTMENTS
  • There are 2 way of adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.
  • The adjustment with the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to its optimum condition may differ from the initial setting values.
  • Make sure that connection is correctly made to AC power source.
  • Turn on the power of the set and equipment before use, and start the adjustment procedures after waiting at least 30 minutes.
  • Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
  • Never touch any adjustment setting value, which are not specified in the list for this adjustment.
  • Preparation for adjustment.  Unless otherwise specified in the adjustment instructions, preset the following functions with the REMOTE CONTROL UNIT.
User mode position
PICTURE MODE (VSM):   BRIGHT
VNR:   OFF
COLOUR / BRIGHT/CONT. / SHARP:  Refer to VSM PRESET
BLUE BACK:   OFF
OFF TIMER:   OFF
ECO SENSOR:   OFF
AUTO SHUT OFF:   OFF

KEY OPERATION OF SERVICE MENU
  • Press the DISPLAY key and the PICTURE MODE key of the REMOTE CONTROL UNIT simultaneously. Then enter the SERVICE MENU.
[Exit from SERVICE MENU]
  • When complete the adjustment work, press the DISPLAY key to return to the SERVICE MENU. And then press the DISPLAY key again, return to the normal screen.
[Select from SERVICE MENU]

ADJUSTMENT USING SERVICE MENU
The following adjustment items use the SERVICE MENU in the series of the adjustment. The adjustments are made on the basis of the
initial setting values. The adjustment values which adjust the screen to the optimum condition can be different from the initial setting values.
With the SERVICE MENU, various settings can be made, and they are broadly classified in the following items of settings.
  1. IF:   Adjustment of the IF circuits.
  2. V/C   :Adjustment of the VIDEO/CHROMA circuit.
  3. DEF:   Adjustment of the DEFLECTION circuit.
  4. VSM PRESET:   Adjustment of the initial setting values of VSM condition as STANDARD, SOFT and BRIGHT. (VSM : Video Status Memory)
  5. PRESET:   Adjustment of the RF circuit [Do not adjust].
  6. TURBO TIMER:   For quick setting the TIMER count value, adjustable not only by minuets but also by second. [Should be OFF].
METHOD OF SETTING
  • IF. [1. VCO]
1 Key:   Select 1.IF.
1 Key:   Select 1.VCO
The VCO (CW) screen will be displayed a allow mark when the AFC voltage is at a certain level.
DISPLAY Key:   When this is pressed twice, you will return to the SERVICE MENU.
  • DELAY POINT
1 Key:   Select 1.IF.
2 Key:   Select 2.DELAY POINT.
MENU -/+:   Set (adjust) the setting values of the setting items.
DISPLAY Key:   When this is pressed twice, you will return to the SERVICE MENU.
  • V/C, 3.DEF and 4.VSM PRESET
2~4Key:   Select one from 2. V/C, 3. DEF and 4. VSM PRESET.
MENU ▼/▲ Key:   Select setting items.
MENU -/+:   Adjust the setting values of the setting items.
DISPLAY Key:   When this is pressed, return to the SERVICE MENU.
  • TURBO TIMER
By pressing the 6 key, you can change the ON or OFF ( should be OFF).  If it is ON, the timer in TIMER mode changes from 1 minute into 1 sec temporarily.  (It is easier to checks the Operation of TIMER)
If you turn the TV power off, this setting becomes OFF automatically.
  • In SERVICE MENU, press the number (1~6) key of the remote control unit, to select any of the adjustment items.
Posted By: FRANK at 02:12
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