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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 20 February 2019

JVC AV21JT5EU AV14JT5EBU SERVICE MODE - ADJUSTMENTS

JVC AV21JT5EU AV14JT5EBU SERVICE MODE - ADJUSTMENTS



APPLICABLE TO:  JVC AV-21JT5EU _ AV-21JT5EBU _ AV-14JT5EU _ AV-14JT5EBU

TO ENTER SERVICE MODE
  • Simultaneously press "Muting" & "Recall" keys on the remote control unit to display Service Mode screen.
  • To call an item to adjust, use [Prog + / Prog-] button on the remote contorl.
  • To adjust the data value to selected item, use [ < / >] key on the remote control.
  • Tie "Exit' service mode, turn the Power switch OFF.
--------------------------------------------------------------
SVC         V1
R BIAS = 140
G BIAS = 192
B BIAS = 128
R DRIVE = 39
G DRIVE = 27
B DRIVE = 32
V. CENTER = 08
V. SIZE = 35
H.CENTER = 38
VCO = 06
VCO FIN = 118
VCO-L = 02
VCO-L FIN = 119
AGC = 46
LED EAST = NO
PR = 91
REMOCON = J
------------------------------------------------------------------
TO MAKE A JIG REMOTE CONTROL
  • First set up JIG remote control unit.  [Use PTU94023BJIG remote control unit]
  • To setup it to a JIG remote control unit,

MEMORY IC REPLACEMENT
  • Replace the memory IC.
  • Turn on the Power by the front panel Power Switch.  TV will go to 'Standby'.
  • Enter custom code [14] and Data code (15) by the JIG remote control.  Enter the 'Transfer' key.
  • Enter custom code [14] and Data code (74), and enter 'Transfer' key.   When entering Service Mode "Service" or "SVC v1" will appear on the top left corner of the screen.
  • Enter custom code [14] and Data code (22), and enter the 'Transfer' key. "Remocon"  menu  {lower right corner} changes from 'DW' to "JVC", so that the remote control code will be set to 'JVC'.  If the 'Remocon' menu sets 'DW' or 'AIWA' the TV will set other codes.  So it must be "JVC".
  • Enter the custom code [14] and Data code (22) and then enter the 'Transfer' key.  TV power will shut down.
  • JVC remote control unit will work when finish all above procedures. ## When shuts off TV on AIWA status, TV will never work on JVC mode.  In this case, it must be exchange the memory IC again
  1. Remove the battery cover.
  2. Simultaneously press digit buttons (4,5 & 6) keys, while insert the battery.  When "43.00" appears on the display window, setup is complete.
  3. To enter custom code, use [<+ / ->] key.
  4. To enter data code to input , use [<+ / ->] key, or directly input data code with " '0' to 'F' keys.
  5. Press the 'Transfer' key to transfer data.