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3-2. LED Blinking
3-2-1. LED BLINKING 3x
3-2-1. LED BLINKING 3x
F4601,IC4602,F4701,IC4701,etc
(K* Board)
IC4602,IC4701etc
(K* Board)
Check the IC4602/4701
Check the
Check 12.5V
( at F4601/4701) to GND
impedance
Replace F4601/4701
High
enough
Out pin 10, 15, 26, 31
Switching 0V to 12V
around 300-400kHz
No
Y
Check the
IC4602/4701 pin 18
(at CL4606/4706)
is HIGH?
Yes
No
Low impedance
IC4602/4701 or parts around IC
NG
Yes
Yes
Solder NG
IC4602 /4701
Check broken parts
Check the CN4702
DC level ~2V
(at JL4621~JL4624
No
L4720,4722,
L4723
or
C4617 C4620
No
burn or broken ?
Yes
around IC4602/4701
/ JL4721~JL4724)
C4617-C4620
/ C4717-C4718
NG
Yes
Check the IC4602/4701
I2S li
i 5 6 7 8
NG
Replace IC4602/4701
I2S line pin 5, 6, 7, 8
(at CL4601~CL4604
/CL4701~4704)
IC9000 NG
OK
IC4602/4701 NG
21
RB1G
CHASSIS
W850/855A
Troubleshooting
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