Sony MHC-V41D Service Manual page 41

3. MOTHER Board Mount Diagnosis Flow (Except Amplifi er)
Connect the power supply cord.
The voltage of the following is outputted.
CN001:
pin 1, (AUDIO_+13V/+16V)
pin 3, 4 (M/D_+13V/+16V)
Yes
The voltage of the following is outputted between the each terminal of IC.
IC Voltage
5 V
IC001
5.2 V
1.2 V
IC009
3.3 V
IC008 12 V
IC004 9 V
IC006 5 V
IC002 12 V
IC1000 5 V
IC305 3.3 V
Yes
End
Standby Demo mode
17.4 V ± 5 % 17.4 V ± 5 %
Pin name Pin number
SW1 3
PGND1 4
SW2 14
PGND2 13
SW1 3
PGND1 4
SW2 14
PGND2 13
VOUT 2
GND 3
VOUT 2
GND 3
VOUT 2
GND 3
OUT 1
GND 3
VOUT 4
GND 2
VOUT 3
GND 2
No
Check the connection of connector
(CN001). When there is not problem to
Power on
the connection, check the SMPS board.
17.4 V ± 5 %
No
When there is problem, replace the
problematic IC.
Test point
JL069
JL070
JL072
JL071
JL073
JL047
JL048
JL137
JL1003
CL395
MHC-V41D
41