Service Mode TV Cina pake IC LA76931

Ada dua cara untuk memasuki modus layanan untuk TV dilengkapi dengan kit ini. Tekan dan Tahan Volume Turun tombol di panel depan TV, sampai level volume nol. Tekan "disply" tombol pada remote control, sambil menekan tombol Volume Down... Cara lain adalah dengan menekan tombol set [dapat ditemukan di antara Sleep dan Game kunci], jika remote control yang disediakan [DGT-5AM3]. Untuk pertama tekan Set kunci  akan menampilkan [--Product--], di bagian atas layar. Pers lainnya akan menampilkan [C-B / W - 00]. Setelah ini, tekan-Digit 1 pada remote control. Layar akan menampilkan:


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
tekan tombol [2] remote control.

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


3
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



 [4]

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

 [5]

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

 [6] 

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

[7]
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

[8].

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

 [9]
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

 KELUAR DARI SERVICE MODE, tekan kmbali seperti awal

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Service Mode TV Cina IC LA76931

UNTUK MASUK PABRIK MODE

Tekan tombol MENU pada remote control pertama, maka tekan tombol RECALL tiga kali berurutan untuk masuk PABRIK MENU.
Tekan P + atau tombol P pada remote control untuk memilih item tes.
Tekan V + atau tombol V pada remote control untuk mengatur nilai item yang dipilih.
Tekan tombol RECALL lagi untuk keluar PABRIK MENU.

FACTORY - 00

H-PHASE 11
OSD-H-POSITION 25
V-SIZE 82
V-POSITION 1
V-LINEARRITY 22
V-SC 4
V-KILL 0
SUB-BRIGHT 85
RF-AGC AUTO 25

FACTORY - 01

H-BLK-L 1
H-BLK-R 2
TUNER 0-3 Q Q2 A A2 0
VOL LINEAR MEASURE 1
B-Y DC LEVEL 11
R-Y DC LEVEL 10
B-Y DC LEVEL-YUV 6
R-Y DC LEVEL-YUV 6

FACTORY - 02

RED-BIAS 117
GREEN-BIAS 134
BLUE-BIAS 153
RED-DRIVE 99
GREEN-DRIVE 10
BLUE-DRIVE 92

OPTION - 00

BACK COVER OPTION 0
Q-ASM OPTION 0
OPT-AV-SYSTEM 0
Y-IN 0:P48 1:P54 1
OPT-YUV 0
LANGUAGE SW CE 1
ENG 0 : CH 1 0
ONLY ENG AND TAI 0

OPTION - 01

LV1116 OPT 0
AUDIO SW 1
SIF6.5M 1
SIF6.0M 1
SIF5.5M 1
SIF4.5M 1

POWER SUPPLY VOLTAGE ADJUSTMENT

  • Check AC voltage is normal or not, AC220V 50Hz.
  • Receive Television broadcast signal, adjust Brightness and Contrast until the standard picture is obtained.
  • Adjust RP950 until voltage between cathode of VD950 and GND of chassis is 110V±0.5V.
WHITE BALANCE AND SUB BRIGHTNESS ADJUSTMENT

BLUE BACK must be turned off and factory menu must be ON before placing the set with aging test.
  • Set Unit to AV, and set the picture to standard mode.
  • Enter FACTORY MENU 00, press P+ or P- button to choose V-KILL, then press V+ button to display horizontal light line on the screen, adjust SCREEN potentiometer so that the horizontal light line just displays anyone color of R,G and B, press V- button to restore the screen.
  • Input left black and right white signal for white balance adjustment.
  • Insert I2C controller plug which is used for automatic adjustment system into XS600 socket on the main board.
  • Turn on color analyzer CA100 to make zero correction.
  • Run the program [WB76810.exe t213.wbd]
  • Press “SPACE” key or press switch on the controller socket, white balance adjustment will be operated automatically. If OK, “ Click” will be heard.
  • Pull out I2C controller plug from XS600, receive black-white PAL five circles pattern signal, and set the picture to standard mode. Enter FACTORY MENU 00, adjust sub-brightness until black-white gray scale is 7~7.5.
HF AGC ADJUSTMENT
  • Receive signal (VHF channel)
  • Set input field strength to 60dBμV
  • Enter into FACTORY MENU 00, select RF AGC item, press V+ button to adjust RF AGC automatically, and when the adjustment is finished, the screen will display RF AGC value.
OSD POSITION ADJUSTMENT
  • Receive PAL five circles pattern signal.
  • Enter into FACTORY MENU 00 and select OSD-H-POSITION, then press V+/V- button to adjust OSD to the proper position
TECHNICAL NOTE OF LA-76931


PIN 1 SIF OUTPUT 2.8V DC
PIN 2 IF AGC FILTER
PIN 3 SIF INPUT 3.3V DC
PIN 4 FM FILTER
PIN 5 FM OUTPUT 2.5V~3.5V
PIN 6 AUDIO OUTPUT DC
PIN 7 SND APC FILTER
PIN 8 IF VCC 5V DC
PIN 9 EXT AUDIO INPUT 2.9V DC
PIN 10 ABL AUTO BEAM LIMITER
PIN 11 RGB VCC 8V DC
PIN 12
PIN 13
PIN 14
R,G,,B OUTPUT
PIN 15 NC
PIN 16 V RAMP OSC.CAPACITOR Connect 0.47uF capacitor to GND
PIN 17 VERTICAL OUTPUT
PIN 18 VCO I REFERENCE Connect 4.7k resister to GND
PIN 19 HORIZONTAL/BUS VCC 9V DC
PIN 20 AFC FILTER
PIN 21 HORIZONTAL OUTPUT
PIN 22 VIDEO CHROMA DEFLECTION GND GND
PIN 23 NC
PIN 24 NC
PIN 25 SVHS CONTROL CONTROL S OSD
PIN 26 REM Remote control
PIN 27 AV2
PIN 28 AV1
Control av1/av2 input
PIN 29 NC
PIN 30 MUTE
PIN 31 SDA I2C control
PIN 32 SCK I2C control
PIN 33 XT1 32.768KHz
PIN 34 XT2 32.768KHz
PIN 35 CPU VCC 5V DC
PIN 36 POWER Control standby
PIN 37 NC
PIN 38 AGC
PIN 39 KEY KEY control
PIN 40 RESET
PIN 41 PLL
PIN 42 CPU GND
PIN 43 CDD VCC 5V DC
PIN 44 FBP INPUT
PIN 45 C INPUT FOR Y/C MODE
PIN 46 Y INPUT FOR Y/C MODE
PIN 47 DDS FILTER
PIN 48 Y INPUT FOR YcbCr MODE
PIN 49 Cb INPUT forYcbCr MODE
PIN 50 4.43MHz CRYSTAL
PIN 51 Cr INPUT FOR YcbCr MODE
PIN 52 SELECTED VIDEO OUTPUT OR FSC OUTPUT
PIN 53 CHROMA APC FILTER
PIN 54 EXT VIDEO INPUT
PIN 55 VIDEO CHROMA DEFLECTION VCC
PIN 56 INT VIDEO INPIT
PIN 57 BLACK STRETCH FILTER
PIN 58 PIF APC FILTER
PIN 59 AFT OUTPUT
PIN 60 VIDEO OUTPUT
PIN 61 RF AGC OUTPUT
PIN 62 IF GROUND
PIN 63 PIF AMP INPUT
PIN 64 PIF AMP INPUT

LA - 76931 BLOCK DIAGRAM

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