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; after replacing the main board said above, on 22^nd May 2012.