Haier L37V6-A8K User manual

- 1 -
L37V6-A8K
TFT-LCD TV/MONITOR
Service Manual
Haier Group

- 2 -
Contents
Contents--------------------------------------------------------------------------2
Safety Caution------------------------------------------------------------------ 3
Specification---------------------------------------------------------------------5
Instruction of remote controller---------------------------------------------- 6
Cautions and Notes-------------------------------------------------------------7
Factory menu--------------------------------------------------------------------9
Connection sketch-------------------------------------------------------------13
Signal flowing chart-----------------------------------------------------------14
Trouble shooting guide--------------------------------------------------------16
BOM List------------------------------------------------------------------------17
Circuit diagram------------------------------------------------------------------41

- 3 -
Safety caution
Warning
To avoid fire or electric hazards,never place your television receiver in an
area with heavy moisture.Attention should be paid to avoid accidental
scratches or impacts onto the LCD screen.The function of sound may be
lost and the function may be disordered in electrostatic discharge ,they
can be restored by operation of the controls.
Caution
Unauthorized disassembly of this product is prohibited.
Power supply
This product requires AC power supply. The voltage value is as per the
information specified on the rating label,which is fixed on the back of the
television set.
Disconnect the televison set with the power source or antenna plug when
it heavily rains with thunderstorm or power supply is interrupted.Do not
tie the electric cables to any other objects to avoid accident damages.
Application area
Do not expose the television set directly to floodlight,sunlight,heavy
humidity,high temperature or thick dusts.Locate the television set in a
well-ventilated area,away from vibration and blockage of ventilation port
on the television rear side.

- 4 -
Cleaning
Unplug the television set when the LCD screen is to be cleaned.Use soft
fabrics for cleaning the screen and electric cables.If necessary, a piece of
wet but clean soft cloth can be used for cleaning the screen,but never use
any liquid or spray detergent.

- 5 -
Specification
1、Power equipment
This product requires AC power supply. The voltage value is
as per the information specified on the rating label,which is
fixed on the back of the television set.
2、Power consumption
The power consumption is less than 160 watt which is
marked on the back cover.
3、Ports
Power in、Antenna input、Earphone output 、Video andAudio
input 、S-Video input 、D-SUB input(Use as monitor) 、
YUV(YPbPr/YCbCr) and Audio input、DVI input、Side Video
and Audio input、DVI/PC audio input、USB input
4、Color system: PAL/NTSC/SECAM, Sound system:BG/DK/I/M.
Multi-sound mode and picture mode.

- 6 -
Instruction of remote controller

- 7 -
Cautions and Notes
Caution:
1、Don’t close the power supply when the TV set is on,because
it may short the life-span of TV.
2、Before welding PCB turn off the power first, otherwise it may
cause short circuit.
3、Adjustment must be done with correct instructions
NOTE:
1、When the remote controller doesn’s work ,please insure that
there is no obstacle between TV set and the remote
controller.
2、Keep the remote controller away from heat source or high
moisture and avoid impacts to the remote controller.
3、Do not operate the remote controller directly in floodlight or
strong sunlight.
4、When the television temperature is low ,initial pictures might
flicker a bit.
5、Some red,green and blue spots may appear on the screen.
6、When used as a compucter monitor,It is recommended that
television screens with 1024*768 pixel/60Hz.
7、Sometimes the remote controller is out of function.this may be
caused by that the Low Emitting Diode is disturbed by

- 8 -
daylight lamp or other equipment which transmits infrared.To
solve this problem you can move the TV set away from the
equipment.
8、If the screen displays a static picture for a long time,the screen
will still maintain the static picture if you turn to another
channel.This is decided by the characteristic of liquid crystal.
If you meet this problem,change to another dynamic
picture,12 hours later,this status will disappear.

- 9 -
Factory menu
Factory menu options
1. To enter factory menu you can follow the steps:
A.Press “MENU”, and the main menu will display on the
screen.
B.Press “DISPLAY” three times continuously, and a red “M” will
display on the top-left corner of the screen.
2. To change to next page, press ”MENU” please.
3. To quit from factory menu, please press”DISPLAY”.
4. Factory menu items:
A. Version informations:
Manufacturer
Version
Date
B. TV/AV position items
H-Position
V-Position
C. White banlance adjusting items:
R_DRV
G_DRV
B_DRV
R_CUT
G_CUT
B_CUT
R_Offset1
G_Offset1
B_Offset1
Backlight
Note:a. There is two separate group parameters you can change:
TV/AV/Svideo/USB and HDTV. Two group parameters are
saved separately. Press “TV/AV” to switch beween the two
groups.
b. In this menu, you can press “-/--/---” to adjust white banlance
automatically. But if you doesn’t like the auto-adjust result,please

- 10 -
adjust the parameters manually.
D. Brightness and contrast numerical value range adjusting.
Video_Bri_MAX
Video_Bri_MID
Video_Bri_MIN
Video_Con_MAX
Video_Con_MID
Video_Con_MIN
HDTV_Bri_MAX
HDTV_Bri_MID
HDTB_Bri_MIN
HDTV_Con_MAX
HDTV_Con_MID
HDTV_Con_MIN
PC_Bri_MAX
PC_Bri_MID
PC_Bri_MIN
PC _ Con _MAX
PC _ Con _MID
PC _ Con _MIN
E. EEPROM menu
a. Page 3
Index 10
Value 0: DVI channel disable.
1: DVI channel enable.
b. Page 3
Index 9
Value 0: OSD zoom disable
1: OSD zoom enable.
c. Page 3
Index 8
Value 0: Photo channel disable
1: Photo channel enable.
d. Page 4
Index 11
Value 0: Sumsang panel
1: LG.PHILIPS panel.
F. DEBUG menu
Slave addr
Page
Index
Value
G. Power on status
Power on status 0: When AC power on, the TV set will start up to “TV”

- 11 -
channel directly, no stand-by.
1: When AC power on, the TV set will be stand-by
state. If you press “Power”(DC power on), it will
start up to “TV” channel.
2: The TV set will store the current source channel
before power down. When AC power on, it will start
up to the source channel stored directly, no
stand-by.
3: The TV set will store the current source channel
before power down. When AC power on, it will be
stand-by state. Press”Power”(DC power on), then it
will start up to the stored channel.
H. Piture status mode menu
a. Bright Mode:
Brightness
Contrast
Color
Sharpness
b. Standard Mode:
Brightness
Contrast
Color
Sharpness
c. Soft Mode:
Brightness
Contrast
Color
Sharpness
Note:There is two separate group parameters you can change:
TV/AV/Svideo/USB and HDTV. Two group parameters are saved
separately. Press “TV/AV” to switch beween the two groups.
I.Sound status mode menu.
a. Music Mode
Treble
Bass
b. Standard Mode
Treble
Bass
c. News Mode
Treble
Bass
J. Volume adjust
Volume 1
Volume 25

- 12 -
Volume 50
Volume 75
Volume 100
K. ADC
GM5221
ADC Phase Delay
ADC Phase CLK
Note:There is two separate group parameters you can change:
TV/AV/Svideo/USB and HDTV. Two group parameters are saved
separately. Press “TV/AV” to switch beween the two groups.

- 13 -
Connection sketch

- 14 -
Signal flowing chart
Main board signal flowing:

- 15 -
Signal flowing chart
USB board signal flowing:

- 16 -
Trouble shooting guide
This diagram is suitable to elementary trouble shooting,if you want
further service,please contact us.
Black Screen
N
oPower module
is normal?
Replace
p
ower
module
Check
Main
board
N
o
YesYes
Idicator
is nomal?
N
o
24V of Powe
r
module is ok?
Check
main
board
Backlight is
open?
Yes
N
o
Replace
p
ower
module
Yes
BKL Enable
is ok?
Yes
Replace
p
anel
N
o

- 17 -
BOM List
Spare parts
number LOCATION PARTS NAME TYPE Qty
0094011651 Mainboard
Assembly
0091801808
Mainboard PCB 1
0094402125 U4 IC 74HC14D 1
0094401779 U10 IC LM1117MPX-3.3 1
0094401779 U11 IC LM1117MPX-3.3 1
0094401779 U16 IC LM1117MPX-3.3 1
0094401951 U12 IC LM1117MPX-1.8 1
0094401951 U13 IC LM1117MPX-1.8 1
0094401951 U19 IC LM1117MPX-1.8 1
0094402322 U14 IC GM5221 1
0094401771 U2 IC 24LC16B 1
0094402323 U15 IC SST39VF020-70-4C-NH 1
0094402324 U17 IC FLI2300 1
0094402325 U18 IC IS42S32200B-6T 1
0094401473 U20 IC VPC3230D 1
0094401937 U5 IC PI5V330Q 1
0094401937 U22 IC PI5V330Q 1
0094402249 U1 IC 24LC02 1
0094402054 U7 IC IRF7314 1
0094402054 U29 IC IRF7314 1
0094402327 U8 IC AP4435M 1
0094402347 U9 IC LM3485 1
0094401940 D1 Diode SMD BAV70 1
0094401940 D10 Diode SMD BAV70 1
0094401874 D2 Diode SMD BAV99L 1
0094401874 D3 Diode SMD BAV99L 1
0094401874 D4 Diode SMD BAV99L 1
0094401874 D5 Diode SMD BAV99L 1
0094401874 D6 Diode SMD BAV99L 1
0094401874 D7 Diode SMD BAV99L 1
0094401874 D8 Diode SMD BAV99L 1
0094402288 D12 Zener Diode SK34DI 1
0094402429 D13 Zener Diode MBRS130 1
0094402348 D14 Diode SMD DL4001-SMT 1
0094402348 D16 Diode SMD DL4001-SMT 1
0094402348 D17 Diode SMD DL4001-SMT 1
0094402349 D24 Diode SMD TZM5232B/5.6V 1

- 18 -
0094401777 Q1 IC MMBT3904 1
0094401777 Q2 IC MMBT3904 1
0094401777 Q3 IC MMBT3904 1
0094401777 Q7 IC MMBT3904 1
0094401777 Q9 IC MMBT3904 1
0094401777 Q10 IC MMBT3904 1
0094401777 Q14 IC MMBT3904 1
0094401777 Q19 IC MMBT3904 1
0094102796 R7 Chip resistor RS-03000JT 1
0094102796 R71 Chip resistor RS-03000JT 1
0094102796 R122 Chip resistor RS-03000JT 1
0094102796 R76 Chip resistor RS-03000JT 1
0094102796 R77 Chip resistor RS-03000JT 1
0094102796 R188 Chip resistor RS-03000JT 1
0094102796 R202 Chip resistor RS-03000JT 1
0094102796 R203 Chip resistor RS-03000JT 1
0094102796 R315 Chip resistor RS-03000JT 1
0094102796 R316 Chip resistor RS-03000JT 1
0094102796 R317 Chip resistor RS-03000JT 1
0094102796 R347 Chip resistor RS-03000JT 1
0094102796 R352 Chip resistor RS-03000JT 1
0094102796 R355 Chip resistor RS-03000JT 1
0094102796 R393 Chip resistor RS-03000JT 1
0094102796 R396 Chip resistor RS-03000JT 1
0094102796 R404 Chip resistor RS-03000JT 1
0094102796 R405 Chip resistor RS-03000JT 1
0094102796 R406 Chip resistor RS-03000JT 1
0094102796 R407 Chip resistor RS-03000JT 1
0094102796 R408 Chip resistor RS-03000JT 1

- 19 -
0094102796 R403 Chip resistor RS-03000JT 1
0094102796 R344 Chip resistor RS-03000JT 1
0094102796 R328 Chip resistor RS-03000JT 1
0094102796 R138 Chip resistor RS-03000JT 1
0094102796 R163 Chip resistor RS-03000JT 1
0094102796 R164 Chip resistor RS-03000JT 1
0094102796 R167 Chip resistor RS-03000JT 1
0094102796 R155 Chip resistor RS-03000JT 1
0094102796 R156 Chip resistor RS-03000JT 1
0094102796 R157 Chip resistor RS-03000JT 1
0094102796 R325 Chip resistor RS-03000JT 1
0094102746 R1 Chip resistor RS05K000JT 1
0094102746 R2 Chip resistor RS05K000JT 1
0094102746 R12 Chip resistor RS05K000JT 1
0094102746 L27 Chip resistor RS05K000JT 1
0094102746 L29 Chip resistor RS05K000JT 1
0094102746 L30 Chip resistor RS05K000JT 1
0094102600 R3 Chip resistor RC-03K100JT 1
0094102613 R117 Chip resistor RC-03K220JT 1
0094102613 R118 Chip resistor RC-03K220JT 1
0094102613 R128 Chip resistor RC-03K220JT 1
0094102613 R129 Chip resistor RC-03K220JT 1
0094102613 R130 Chip resistor RC-03K220JT 1
0094102613 R131 Chip resistor RC-03K220JT 1
0094102613 R145 Chip resistor RC-03K220JT 1
0094102613 R150 Chip resistor RC-03K220JT 1
0094102613 R151 Chip resistor RC-03K220JT 1

- 20 -
0094102613 R205 Chip resistor RC-03K220JT 1
0094102767 RN7 Chip resistor net MNR14P2ABJ220 1
0094102767 RN8 Chip resistor net MNR14P2ABJ220 1
0094102928 R73 Chip resistor RS-03K470FT 1
0094102928 R74 Chip resistor RS-03K470FT 1
0094102928 R75 Chip resistor RS-03K470FT 1
0094102824 R20 Chip resistor RS-03K750JT 1
0094102824 R21 Chip resistor RS-03K750JT 1
0094102824 R27 Chip resistor RS-03K750JT 1
0094102824 R28 Chip resistor RS-03K750JT 1
0094102824 R29 Chip resistor RS-03K750JT 1
0094102824 R112 Chip resistor RS-03K750JT 1
0094102824 R113 Chip resistor RS-03K750JT 1
0094102824 R114 Chip resistor RS-03K750JT 1
0094102824 R134 Chip resistor RS-03K750JT 1
0094102825 R8 Chip resistor RS-03K101JT 1
0094102825 R9 Chip resistor RS-03K101JT 1
0094102825 R18 Chip resistor RS-03K101JT 1
0094102825 R19 Chip resistor RS-03K101JT 1
0094102825 R48 Chip resistor RS-03K101JT 1
0094102825 R92 Chip resistor RS-03K101JT 1
0094102825 R120 Chip resistor RS-03K101JT 1
0094102825 R121 Chip resistor RS-03K101JT 1
0094102825 R125 Chip resistor RS-03K101JT 1
0094102825 R165 Chip resistor RS-03K101JT 1
0094102825 R176 Chip resistor RS-03K101JT 1
0094102825 R177 Chip resistor RS-03K101JT 1
0094102825 R204 Chip resistor RS-03K101JT 1
0094102825 R233 Chip resistor RS-03K101JT 1
0094102825 R243 Chip resistor RS-03K101JT 1
0094102825 R47 Chip resistor RS-03K101JT 1
0094102825 R311 Chip resistor RS-03K101JT 1