Sony KLV-32D300A / KLV-40D300A / KLV-46D300A (serv.man2) Service Manual ▷ View online
– 8 –
KL
V
V
-32/40/46D300A
RM-GA008
B
ASIC TR
OUBLESHOO
TING
Power ON Sequence
No
No
No
Yes
Yes
Yes
Picture
appear
Direct Inverter ON
D1,D1/D2
AC100-220V
IN
Stand by mode
Stand by
Power Supply
ON
"Power ON"
CN6202 pin 10
V>3V?
No picture
Vcc SW
Q6400 ON
PFC Converter
ON
PFC out Voltage
CN6501 pin-1
V>350V?
No picture
Main Converter ON
Low B out
CN6203 REG12V
CN6202 UNREG 6V/AUDIO 13V
"BLACK_LIGHT"
CN6204 pin 3
V>3V?
– 9 –
KLV-32/40/46D300A
RM-GA008
Troubleshoot
Check the all harness and connectors first, whenever you find any problem.
Case 1)
Check the CN4003 on
BG1 board
Check the 12V from
BG1 board
Check BH
board
Done
Done
Check the 12V line on
BG1 board
Check BG1
board
Change the
Panel
No picture
Check the
Back Light
Indicate
OSD
Check the
Trident
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
– 10 –
KLV-32/40/46D300A
RM-GA008
Troubleshoot
Check the all harness and connectors first, whenever you find any problem.
Case 2)
Check the 12V from
BG1 board
Check BH
board
Done
Done
Abnormal picture
Check the 12V on BG1
board
Change BG1
board
Change the
Panel
OK
OK
OK
NG
NG
NG
– 11 –
KLV-32/40/46D300A
RM-GA008
Troubleshoot
Check the all harness and connectors first, whenever you find any problem.
Case 3)
Noise
Noise
Dot Noise
Fig. 1
Fig. 2
Fig. 3
When the noise is
figure1 or 2.
Change the screen
mode.
Is the position of the
noise same as
former?
Check the Trident
When the noise is
figure3.
Indicate the OSD.
Does the noise
disappearon OSD
area?
Noise Picture
Check the Trident or the
circuit of the former
steps.
Change BH
board
Done
Done
Change BG1
board
Change the
Panel
Yes
No
No
OK
OK
NG
NG
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