Sony SA-WX9000F Service Manual page 15

2. ON/STANDBY indicator does not light up (Power is not turned on)
ON/STANDBY indicator does not
light up.
(Power is not turned on)
Yes
The voltage of the following is about Fuse (F901, F902) and fusible
No
28.5 V. resistor (R923) on the POWER
POWER board: CN902 pin 1 board conduct the electricity.
Yes
POWER board might have been
damaged. Replace the POWER
board.
Check the mounted state of area surrounding IC8000 on the
No
The voltage of the following is 3.3 V.
SK1 SUB MAIN board do not short-circuits or opens. If there is
SK1 SUB MAIN board: IC8000 pin 1
no abnormality, replace the SK1 SUB MAIN board.
Yes
The voltage of the following is 3.3 V. Check the pattern of area surrounding connector (CN8101) on
No
SK1 SUB MAIN board: the SK1 SUB MAIN board and UNSW3.3V line. If there is no
CN8101 pin 9 abnormality, replace the Bluetooth module.
Yes
The reset signal is inputted to pin 21
Check the mounted state of area
No
(AC_CUT) of connector (CN8101)
surrounding IC8102 on the SK1
on the SK1 SUB MAIN board after
SUB MAIN board, and repair it.
AC input.
Yes
Check the area surrounding connector (CN8101) on the SK1
SUB MAIN board. If there is no abnormality, the Bluetooth
module or SK1 SUB MAIN board are abnormality. Replace the
Bluetooth module or SK1 SUB MAIN board.
SA-WX9000F/WXF9000
Even if the fuse (F901, F902) on the
POWER board is replaced, it will be
No
damaged.
(Fusible resistor (R923) on the POWER
board is damaged, replace the POWER
board)
Yes
Yes
3. The sound is not outputted
The sound is not outputted.
Yes
The waveform of the following is normal.
SK1 SUB MAIN board:
IC8103 pin 11 (MCLK)
IC8103 pin 22 (LRCLK)
IC8103 pin 23 (SCLK)
IC8103 pin 27 (SDIN4)
Yes
The waveform is outputted from the
IC8104 pin 35 (OUT_B), 39 (OUT_A), 40
(OUT_A) on the SK1 SUB MAIN board.
Yes
Check the mounted state of area surrounding
IC8104 on the SK1 SUB MAIN board do not
short-circuits or opens. If there is no
abnormality, IC8104 on the SK1 SUB MAIN
board might have been damaged. Replace
the IC8104 on the SK1 SUB MAIN board.
The sound is outputted from the
connector (CN8103) on the SK1 SUB
MAIN board.
Yes
Check the contact between connector
(CN8103) on the SK1 SUB MAIN board
and subwoofer cable.
Check the contact between subwoofer
(SP1) and subwoofer cable.
15 15
SA-WX9000F/WXF9000
Check the area surrounding IC8103 and connector
(CN8101) on the SK1 SUB MAIN board.
No
Check the flexible flat cable (FFC1) (between Bluetooth
module and CN8101).
If there is no abnormality, replace the Bluetooth module
or flexible flat cable (FFC1).
Check the mounted state of coil (L8101) on
the SK1 SUB MAIN board, and then replace
the SK1 SUB MAIN board.
The reset signal inputted to
No No
The voltage of the following is 3.3 V.
pin 4 of IC8104 on the SK1
SK1 SUB MAIN board:
SUB MAIN board from pin 37
IC8103 pin 9, 14, 35, 50
of IC8103 on the SK1 SUB
MAIN board.
Yes
The waveform of the following is normal.
The waveform is outputted SK1 SUB MAIN board:
No
from the IC8103 pin 48 (PWM IC8103 pin 16 (RESET)
_M_4), pin 49 (PWM_P_4) on IC8103 pin 18 (PDN)
the SK1 SUB MAIN board. IC8103 pin 19 (MUTE)
IC8103 pin 20 (SDA)
Yes
IC8103 pin 21 (SCL)
Check the mounted state of area surrounding
IC8103 on the SK1 SUB MAIN board do not
short-circuits or opens. If there is no
abnormality, IC8103 on the SK1 SUB MAIN
board might have been damaged. Replace
the IC8103 on the SK1 SUB MAIN board.
Check the LC circuit of
amplifier output.
No Check the area surrounding connector
(L8102, L8103, C8136,
(CN8101) on the SK1 SUB MAIN board.
C8137 and C8139 on the
Check the flexible flat cable (FFC1) (between
SK1 SUB MAIN board)
Bluetooth module and CN8101).
If there is no abnormality, replace the
Bluetooth module or flexible flat cable (FFC1).
No
Yes
No
Yes