Sony KDL-32W700C / KDL-32W705C / KDL-40W700C / KDL-40W705C / KDL-48W700C / KDL-48W705C / KJ-32W700C / KJ-40W700C / KJ-48W700C Service Manual ▷ View online
53
Troubleshooting
3-3-2. No Sound : Audio (For AEP models only) TUS (HE-L,HM,HE-H,XM-L)
#1
Check the SCART
(use Digital RF
Tuner input)
#1
OK
Check the IC3101 pin 3
VCC 3.3V
DC/DC converter is NG
See to section “1.3. No
See to section “1.3. No
POWER: - DDCON/LDO.
NG
OK
Check the
CNT pin7 (IC3101)
is HIGH?
IC3101 NG
OK
No Problem
NG
Solder NG
NG
NG
OK
IC3101 NG
OK
IC9001 is NG
No signal
NO
This is MUTE situation.
Check IC9000
OK
Check the
IC3101 pin 6
VEE-3.3V
INR & INL
pin10 &1 (IC3101)
(at CL3100 and CL3105)
Signal is coming?
Check the solder
Of IC3101 CP & CN
(4&5pin) & C4511
Note:
(AYU2/
(AYU2/
Ayu2L
) – IC9000
(Brownie)- IC9001
TUS board Side A
54
INR
(
P
in
1)
IC3101
VCC
(P
in
3)
C
P (
Pi
n
4)
CN
(P
in
5)
V
EE (
P
in
6)
CNT
(
P
in
7)
INR (Pin10)
C
L
3100
C
L
3105
C
4511
Troubleshooting Reference
No
Checking Item
OK
NG
1
Check fuse F4601
Fuse short
Fuse open
2
Check connectivity audio Vcc to GND
C4606 – GND
C4607 – GND
C4608 – GND
C4609 – GND
C4606 – GND
C4607 – GND
C4608 – GND
C4609 – GND
No short to GND
Either 1 short to GND
3
Check connectivity audio +3.3V_MAIN to GND (only for BAX-
L board)
IC4601 (Pin8) – GND
IC4601 (Pin27) – GND
L board)
IC4601 (Pin8) – GND
IC4601 (Pin27) – GND
No short to GND
Either 1 short to GND
4
Check connectivity audio output to GND.
CN4601
Pin 1 – GND
Pin 2 – GND
Pin 3 – GND
Pin 4 – GND
CN4601
Pin 1 – GND
Pin 2 – GND
Pin 3 – GND
Pin 4 – GND
No short to GND
Either 1 of pin short to GND
5
Check connectivity audio output path
(only for BAX-L
(only for BAX-L
board):
L4601 (near to IC side) – CN4601 Pin4
L4602 (near to IC side) – CN4601 Pin3
L4603 (near to IC side) – CN4601 Pin2
L4604 (near to IC side) – CN4601 Pin1
L4602 (near to IC side) – CN4601 Pin3
L4603 (near to IC side) – CN4601 Pin2
L4604 (near to IC side) – CN4601 Pin1
Must have good connection (~0
Ω)
Open circuit.
55
Troubleshooting
3-3-3. Main Board Power Off Checking (for Main SP Lch & Rch) for BAX-L (HEL,HEH,HM,XM-L) board only
56
Troubleshooting
Troubleshooting Reference
BAX-L board Side A
56
CN4601
P
in 1
P
in 2
P
in 3
P
in 4
L4604
L4603
L4602
L4601
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