KLV-22S570A - Sony TV Service Manual (repair manual). Page 10

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KLV-22S570A
RM-GA016W
PICTURE NG
All input have 
  problem
BT2 Board  NG
NO
YES
LVDS harness connection 
or BT2 board or Panel  NG
BT2 Board or GT2 Board  NG
NO
YES
Backlight  on?
UI of some picture 
setting correct?
Set correctly or reset by menu
YES
NO
SECTION 3
TROUBLESHOOTING
3.1 Flowchart
NO
Check AC cable
connection 
BT2 or Switch Unit  NG
AC cable  NG
No Power
STBY_VCC
(GT2:13.2V)
CN7000_7pin on BT2 
YES
YES
YES
GT2 Board NG
NO
Sound NG
Only speaker out?
BT2 Board  NG
UI of Audio 
setting 
correct?
Volume,TV speaker
NO
YES
Set correctly or reset by menu
BT2 Board or Speaker  NG
NO
YES
AUDIO_VCC(GT2:1
(GT2:10V, GT3:13V,
G4:15V)
CN7000_1, 2pin on 
NO
YES
GT2 Board  NG
Trouble Shooting Flowchart
1. NO POWER
2. SOUND NG
3. PICTURE NG
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