Hisense Lcd42p69p Service Manual

 
 
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LCD TV Service Manual                         
Hisense Confidential 
7.3 TV won’t Power On 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Make Sure Power 
source is live 
Replace 
Power Cord 
Check/replace IR 
BD or Keypad 
PCA 
TV won’t power on 
Is LED 
light? NO 
YES Check Power 
Inlet YES 
NO 
Check Power 
Cord
Only 
one works 
Replace Main 
BD 
Try Power on by 
RC and Button 
Neither 
works Both  
Wo r k  
Power on OK YES 
NO 
Replace Power BD 
YES 
NO RED BLUE 
OSD? 
NO 
Replace Main BD 
NO...

 
 
 - 32 -
LCD TV Service Manual                         
Hisense Confidential 
7.4 Troubleshooting for Audio 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
No sound 
Check connecter   
Check speaker wire 
Replace main board 
Reconnect 
Replace speaker wire 
YES 
YES  NO 
NO 
Check speaker set Replace speaker set YES 
NO 
OK YES 
NO 
Replace PSU 
 

 
 
 - 33 -
LCD TV Service Manual                         
Hisense Confidential 
7.5 Troubleshooting for TV/VGA/HDMI input 
No picture on the screen 
Check Signal Source 
Check connect 
Check cable 
Replace main board 
Make sure signal 
source is available 
Reconnect 
Replace cable 
NO 
YES 
YES 
NO  NO 
 
 
 
 
 
 
 
 
 

 
 
 - 34 -
LCD TV Service Manual                         
Hisense Confidential 
7.6 Troubleshooting for YPbPr input 
No picture on the screen 
Check Source work or not 
Check connect 
Check Wires (Green Blue, Red) 
Replace main board 
Check Source Device 
Reconnect 
Replace wires 
NO 
YES   
YES  NO  YES 
NO 
 
 
 
 

 
 
 - 35 -
LCD TV Service Manual                         
Hisense Confidential 
7.7 Troubleshooting for Video/S-Video input 
No picture on the screen 
Check Source work or not 
Check connect 
Check Cable/ Wires 
Replace main board 
Check Signal Source 
Reconnect 
Replace Cable/Wires 
NO 
YES   
YES  NO  YES 
NO 
 
 
 
 
 
 
 
 

 
 
 - 36 -
LCD TV Service Manual                         
Hisense Confidential 
8. Explode View   
9. Schematic circuit diagram 
 
 
 

55
44
33
22
11
D
D
C
C
B
B
A
A
OFF_MUTE
+3V3
12V_MSCT2_AUR_OUTSCT2_AUL_OUT
GND
HPOUTL1 HPOUTL1
GPIO_11
A_MUTE
DAC_AUR_OUTDAC_AUL_OUT
A_MUTEGPIO_11
HPOUTL1HPOUTR1
AOMCLKAOLRCKAOBCKAOSDATA0
5V_M
AOMCLK
AOBCKAOLRCKAOSDATA0
HPOUTR
DAC_AUL_OUTDAC_AUR_OUT
HPDET#
DAC_AUL_OUTDAC_AUR_OUT
HPOUTLHPOUTR
SCT1_AUR_OUTSCT1_AUL_OUT
DAC_AUR_OUT
DAC_AUL_OUT
AL2AL1AR1AR2
DACVA
AOTLAOTR
AL2AR2AOTLAOTR
BOMCLKBOLRCKBOBCKBOSDATA0
AR1AL1
SCT1_AUL_OUT
A_MUTEA_MUTE
SCT1_AUR_OUT
A_MUTE
SCT2_AUL_OUT
A_MUTE
SCT2_AUR_OUT...

55
44
33
22
11
D
D
C
C
B
B
A
A
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Low = HP insert High = WP disable
High = Mute on
ADIN0
ADIN1
ADIN2
ADIN3
ADIN4
ADIN5GPIO_20
GPIO_21
GPIO_22
GPIO_23
GPIO_24
GPIO_25
HMDI 0 HPLUG...

55
44
33
22
11
D
D
C
C
B
B
A
A
GND
+3V3AV12DDRV+5V_TUNERDV10+5V_ON12V_M5V_M
SW
UP31
BL-ON/OFFBL-ADJUSTSW
BL-ON/OFFBL-ADJUST
UP31
PW_CTL1
PW_CTL1
DDRV
+5V_ON
DV10
5V_M
+5V_TUNER
+3V3
AV12
12V_M
+5V_ON+3V3AV12DDRV+5V_TUNERDV1012V_M5V_M
12V_M
+5VS
5V_M
+5VS
12V_M+5VS5V_M
12V_M
VPA
+3V3
+5V_ON
VPA
12V_M
5V_M
+5V_ON
5V_M
+5VS
+5V_ON
GND 3,4,5,6,7,8,9,10,11,12,13,14+5V_ON+3V3 3,4,6,7,11,13,14AV12 4DDRV 3,4,5+5V_TUNER 11DV10 3,412V_M 11,145V_M 3,6,8,12,13,14UP31 3,6BL-ON/OFF 14BL-ADJUST 14PW_CTL1 6
Title...