Sony RB1G Service Manual page 51

Troubleshooting
3-2-3. LED BLINKING 3x (Audio Error) – BKE and BKX board only
#2
F4601,IC4601,etc
(B* Board)
High
Check 19.5V
enough
(at fuse F4601)
to GND
impedance
Low impedance
IC4601
burn or broken ?
Yes
Replace IC4601
Replace F4601
No
Check broken parts
around IC4601
#3
IC4601,etc
(B* Board)
Check the IC4601
Check the IC4601
Out pin 38, 42, 43, 47
No
pin 18 (at CL4606)
Switching 0V to 19V
around 300-400kHz
Yes
IC4601 or parts around IC4601 NG
Check the CN4601
No
DC level ~9.7V
(at JL4621~JL4624)
Yes
Check the IC4601
NG
I2S line pin
4, 12, 15, 16 (at
CL4601~CL4604)
OK
IC4601 NG
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
Size B* Board Type
(Segment: LW)
OTHERS EUROPE
32" BKX
42" BKX
No
is HIGH?
Yes
Solder NG
L4601-L4604
or
C4611-C4614
NG
IC9000 NG
Note:
(AYU2) – IC9000
(Brownie)- IC9001
RB1G CHASSIS
JP
BKE BKJ
BKE BKJ
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