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 !

Thursday 21 February 2019

JVC - AV 21BF11 SERVICE MODE AND ADJUSTMENTS

JVC - AV 21BF11 SERVICE MODE AND ADJUSTMENTS



TO ENTER SERVICE MODE  [Remote control  RM-C1100TV]

  1. Press "Menu" key.
  2. Press [4 => 7 => 2 => 5] in sequence on the remote control, or
  3. Press "Muting" and "Information" keys simultaneously.
  4. The service menu will be displayed.
  5. Verify what to set in the 'Service Menu" and set whatever necessary.
  6. Press "Standard" key to "EXIT" service menu.
SETTINGS APS BIT IN SERVICE MENU
  • Enter Service Menu in 'TV' mode by pressing 'Information" and "Muting" keys simultaneously
  • Select [TX 1](Teletext Option), by pressing Up | Dn keys on the remote control.
  • Press '7' key on the remote control to set APS bit.  (After this, bit '7' of TX-1 will be "1")
  • Press "Standard" key on the remote control to 'Exit' from service mode.  (NB):  Do not turn  off the TV by using Power Button on the Front Panel.
_________________________________________________________________________________
                                                                Service Menu Screen
_________________________________________________________________________________
                                                                        

                                                                         MENU

                                                                      >SOUND>
                                                                      PICTURE>
                                                                      FEATURE>
                                                                       INSTALL>
                                                                     
                                                                     PROGRAM>
_________________________________________________________________________________

  • Use the Function [Up | Dn] keys to select an item to adjust.
  • Use Function ( < ) | ( > ) keys to adjust the data value to selected item.
REMOTE CONTROL KEYS
  • Red Key:  It switches AVL to 'ON' or 'OFF' mode on service menu.  AVL word is visible on service menu, when 'AVL' is ON.
  • Green Key:  It switches to Geometry Adjust menu.  Geometry of the picture is adjusted in this menu.
  • Yellow Key:  It switches 'Vertical Scan Disable' mode.  It is useful to adjust 'screen' voltage.
  • Blue Key:  It is used to adjust 'AGC' and 'IF' automatically on service menu.
ADJUSTMENT ITEMS & AND INITIAL VALUES. 

OSD = 082
IF 1= 004
IF 2 = 065
IF 3 = 004
IF 4 = 065
AGC = AUTOMATICALLY
VLIN = 045
RGBH = 007
VSOF = (-01)
VSOF = (-01)
HSOF = NOT USED
HPOF = 00
HTOF = NOT USED
WR = 040
WG = 040
WB = 040
BR = 030
BG = 031
APR = 010
BRI = 030
CON = 035
COL = 038
SHR = 006
HUE = 031
VOL = 015
WR-R = 030
WG-R = 055
WB-R = 032
FMP1 = 009
NIP1 = 020
SCP1 = 013
SEC1 = 013
FMP2 = 013
NIP2 = 016
SCP2 = 013
SEC2 = 013
F1H = 0000 1001
F1H = 1001 0010
F2H = 0001 1011
F2L = 1000 0010
BS1 = 0000 0011
BS2 = 0000 0110
BS3 = 1000 0101
CB = 1000 1110
Posted By: FRANK at 04:19
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