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 !

Tuesday, 26 February 2019

HOW TO ENTER SERVICE MODE TO CHINESE TV KIT USING [LA-76931-7N56ZN2 P1] IC ONE-CHIP MICOM - SANYO MAIN BOARD

HOW TO ENTER SERVICE MODE TO CHINESE TV KIT USING [LA-76931-7N56ZN2 P1] IC ONE-CHIP MICOM - Sanyo Main Board


There are two ways to enter the service mode to TVs fitted with this kit.
  1. Press and Hold Volume Down button at the front panel of the TV, until volume level comes to zero.
  2. Press “Display” button on the remote control, while pressing the Volume Down button. 
The other ways is to press the set key [can be located in between Sleep and Game keys], if the supplied remote control is [DGT-5AM3].
For the first press to Set key said above, will display [ --Product--], on the top of the screen.
An other press will display [C-B/W – 00].
After this, press Digit-1 on the remote control. The screen will display:
VER.79RJ:F2
PO-1
V-POSI/P
27
V-SHIFT/P
04
V-LIN/P
18
V-SC/P
29
V-SIZE/P
51
V-POS/NT
+05
V-SHIFT/NT
00
V-LIN/NT
00
V-SC/NT
--11
V-SIZE/NT
--19
Now press Digit [2] on the remote control.  The screen display changes to:

VER 79RJ-F2
PO-2
C-B/O
00
RB
19
CB
124
BB
67
R-D
85
G-D
01
B-D
85
S.B
99



Now press digit [3] on the remote control.  The screen display changes to:

VER 79RJ-F2
P-03
RF-AGC
36
BRI-MAX
63
CONTRAST/50
63
COLOR/50
63
SHARP/50
63
TINT
32
BRI-MIN
00
B-Y/DC.DVD
08
R-Y/DC.DVD
08
FACTORY RESET
NO



Now press digit [4] on the remote control.  The screen display changes to:

VER 79RJ-F2
P-04
OPT-AV
01
OPT S-VIDEO
NO
OPT-DVD
NO
OPT-AV3
NO
VS-TUNER
YES
OPT-BAND
02
VL TO VH
144.25 Mhz
VH TO V
389.75Mhz
Tune speed
01

Now press digit [5] on the remote control. The screen display changes to:

VER 79RJ-F2
P-05
ENG OSD
ON
CHN OSD
ON
THA OSD
ON
VIE OSD
ON
INA OSD
ON
FRA OSD
ON
HALF TONE
CD

Now press digit [6] on the remote control.  The screen display changes to:

VER 79RJ-F2
P-06
COL AUTO
ON
COL PAL
ON
COL NTSC
ON
COL-N 4.43
ON
DEF COLOR
---
C-TRAP ADJ/PAL
04
C-TRAP ADJ/NTSC
04
C-BPF ADJ
00
C-VCO ADJ NTSC
04
TV-OUT/AV
OFF
Now press digit [7] on the remote control.  The screen display changes to:

VER 79RJ-F2
P-07
SIF D/C
OFF
SIF I
OFF
SIF B/G
ON
SIF M/N
OFF
SIF BG2
ON
DEF SOUND
---
DEM TC
00
FM GAIN
00
V60 M/N-AUTO
OFF
VOL-DDB
NO

Press digit [8].  The display will be:

VER 79RJ-F2
P-08
OPT BALANCE
NO
VOL/01
00
VOL/16
61
VOL/36
103
MENU KEY
1
-/--- KEY
00
PRO-MUTE
ON
OPT AV-PNP
00
CURTAIN H-POS
00
CURTAIN TYPE
00
Press digit [9] on the remote will change the display to:

VER 79RJ-F2
P-09
AC POSER ON
LAST
ON-TV/AV
TV
ON-DELAY
02
ON SEARCH
OFF
ON CURTAIN
OFF
OFF CURTAIN
ON
AV CURTAIN
1
OFF-V-DELAY
00
OFF-PIC BLK
ON

 TO EXIT FROM SERVICE MODE, PRESS THE ST KEY AGAIN
All these values described above, are set to one 21” True Flat screen Onida TV
Posted By: FRANK at 05:17
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