Sony SA-Z9R Service Manual page 20

SA-Z9R
3. The sound is not outputted
The sound is not outputted.
Yes
The waveform of the following is normal.
SK2 REAR MAIN board: IC8006
pin 11 (XTI), pin 55 (LRCKI),
pin 56 (BCKI), pin 1 (SDIN1)
Yes
The waveform is outputted from the
IC8010 pin 35 (OUT_B), 39 (OUT_A), 40
(OUT_A) on the SK2 REAR MAIN board.
Yes
The sound is outputted from the
connector (CN8009) on the SK2 REAR
MAIN board.
Yes
Check the contact between connector
(CN8009) on the SK2 REAR MAIN
board and speaker cable.
Check the contact between speaker
(SP1) and speaker cable.
The voltage of the following is 3.3 V.
SK2 REAR MAIN board: IC8014 pin 3
Yes
Resistor (R8212) and coil (L8007, L8013)
on the SK2 REAR MAIN board conduct
the electricity.
Yes
Check again the area surrounding
IC8006 on the SK2 REAR MAIN board.
If there is no abnormality, replace the
SK2 REAR MAIN board.
20
Check the area surrounding IC8006, vibrator (X001)
and connector (CN8022) on the SK2 REAR MAIN board.
No
Check the flexible flat cable (FFC1) (between RF
modulator and CN8022).
If there is no abnormality, replace the RF modulator or
flexible flat cable (FFC1).
The reset signal inputted to
pin 4 of IC8010 on the SK2
No
REAR MAIN board from pin
40 of CN8022 on the SK2
REAR MAIN board.
The waveform is outputted
from the IC8006 pin 16
(PWMOUT1PL), pin 17
(PWMOUT1NL) on the SK2
REAR MAIN board.
Check the mounted state of area surrounding
IC8010 on the SK2 REAR MAIN board do not
short-circuits or opens. If there is no
abnormality, IC8010 on the SK2 REAR MAIN
board might have been damaged. Replace
the IC8010 on the SK2 REAR MAIN board.
Check the LC circuit of
amplifier output.
No
(L8019, L8020, C8063, and
C8064 on the SK2 REAR
MAIN board)
Check again the area surrounding
No
IC8014 on the SK2 REAR MAIN board.
If there is no abnormality, replace the
IC8014 on the SK2 REAR MAIN board.
No
Replace the SK2 REAR MAIN board.
Check the area surrounding IC8010 and
connector (CN8022) on the SK2 REAR
MAIN board.
No
Check the flexible flat cable (FFC1)
(between RF modulator and CN8022).
If there is no abnormality, replace the RF
modulator or flexible flat cable (FFC1).
Yes
The voltage of the following is 3.3 V.
SK2 REAR MAIN board: IC8006
No
pin 18 (VDDPWM1), pin 24 (VDDPWM2),
pin 30 (AVDD2R), pin 35 (AVDD2L),
pin 36 (AVDD1R), pin 41 (AVDD1L),
pin 47 (AVDDAD), pin 54 (DVDD)
Yes
The waveform of the following is normal.
SK2 REAR MAIN board: IC8006
pin 12 (SCL), pin 13 (SDA),
pin 14 (XRESET), pin 15 (XINT)
Check the mounted state of area
surrounding IC8006 on the SK2 REAR
MAIN board do not short-circuits or
opens. If there is no abnormality, IC8006
on the SK2 REAR MAIN board might
have been damaged. Replace the SK2
REAR MAIN board.
Check the area surrounding connector
(CN8022) on the SK2 REAR MAIN board.
Check the flexible flat cable (FFC1)
(between RF modulator and CN8022).
If there is no abnormality, replace the RF
modulator or flexible flat cable (FFC1).
No
Yes
No
Yes