Sony RB1G Service Manual page 274

3-2.1 LED Blinking: 3x (DC Alert & Communication Error)
3-time blinking
DC_ALERT
Check D+1.0V at
NG
F9105
on the B* Board
OK
NG
Check +3.3V_MAIN_1
At SL9103 / R9154(BL*)
on the B* Board
OK
Check +1.8V_MAIN
NG
at IC9201 pin1 &2 on
the B* Board
OK
Check +5V_MAIN
NG
at SL9109 / L9105 (BL*)
on the B* Board
DMD_TU_I2C
Probe CL2151, CL2152,
F9105,IC9103,
CL2318,CL2319(BLJ)
etc(B* Board)
OK
Information Not Use
F9102,IC9102,
I2C_CCP check
etc(B* Board)
OK
IC9201,etc
(B* Board)
I2CA bus check:
Probe CL5023,
IC9101,etc
(B* Board)
OK
Note: For location details, refer to troubleshooting Reference for parts location.
TUNER
NG I2C bus
dumping or
IC9000 (AYU2L)
Brownie
NG
R8502 and
I2C_CCP
R8503
Pull Up
HDMI
NG
I2CA bus
dumping
resistor
CL5024
or AYU2
W600A/ W603A/ W605A/ W607A/ W650A/ W651A/ W653A/
W654A/ W655A/ W656A/W657A/ W658A/ W670A/ W674A
AUDIO
Check
NG
Speaker Impedance
at SP Connector
OK
Check AUDIO+12.5V
at pin 8/10 of
NG
CN9101 on
the B* Board
(except BK*/BL*)
OK
Check +19.5V
at Power Amp side
NG
of F4601
on
the B* Board
OK
IC4601,etc
(B* Board)
#3
RB1G CHASSIS
Speaker
G* Board
F4601,IC4601
,etc (B* Board)
#2
274