Sony KDL-65W850A / KDL-65W855A Service Manual ▷ View online
BA2 board Side B
CL4602
CL4603
CL4604
CL46
0
CL4502
CL4501
0
1
INR+ 1
14 IN-
9 Vdd
X_AUDIO_MUTE_SPHPLO 5
Vss 6
CP 7
8 CN
IC4501
CP 7
8 CN
C4501
37
RB1G
CHASSIS
W850/855A
Troubleshooting
#1
3-3-2. NO SOUND: Audio (Additional : For RU models only)
Check the SCART
(use Digital RF
OK
Check the
CNT pin7 (IC4511)
No Problem
NO
This is MUTE situation.
Tuner input)
CNT pin7 (IC4511)
is HIGH?
NG
Check IC9000
OK
Check the IC4511
pin 3
VCC 3.3V
DC/DC converter is NG
See to section “1.2 NO POWER:
Ayu2 control”.
NG
IC9001 is NG
No signal
INR & INL
pin10 &1 (IC4511)
(at CL4512 and CL4511)
Signal is coming?
OK
IC4511 NG
OK
Signal is coming?
NG
NG
Check the
IC4511 pin 6
VEE-3.3V
Check the solder
Of IC4511 CP & CN
(4&5pin) & C4511
IC4511 NG
OK
Solder NG
OK
IC4511 NG
38
RB1G
CHASSIS
W850/855A
Troubleshooting
BA2 board Side B
CL4512
CL4511
3 Vcc 3.3V
Vee -3.3V 6
4 CP
5 CN
C4511
CNT 7
1 INL
INR 10
39
RB1G
CHASSIS
W850/855A
Troubleshooting
RB1G
CHASSIS
W850/855A
No
Checking Item
OK
NG
3-3-3. K Board Power Off Checking (for Main SP Lch & Rch)
1
Check fuse F4601 / F4701
Fuse short
Fuse open
2
Check connectivity audio Vcc to
GND
No short to
GND
Either 1 short to GND
C4606 – GND C4706 – GND
C4607 – GND C4707 – GND
C4608 – GND C4708 – GND
C4609 – GND C4709 – GND
3
Check connectivity audio output to
No short to
Either 1 of pin short to
3
Check connectivity audio output to
GND.
CN4702
Pin 1 – GND
Pin 2 – GND
Pin 3 – GND
Pi 4 GND
No short to
GND
Either 1 of pin short to
GND
Pin 4 – GND
40
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