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2.8. ANALOG AUDIO OUT
Check the power supply for the STA309A AUDIO processor
MAIN PCB
• IC102 : 3, 12, 44, 52, 59 309_+3.3V_
• IC113 : OUT +3.3V_D1
Audio input signal (for PCM) for the STA309A AUDIO processor
Check the I2S signal.
• IC102 : 11 pin STA309_BCKO
10 pin STA309_LRCKO
9 pin STA309_DOUT
Audio signal (for DSD) for the STA309A AUDIO processor
Check the DSD signal.
• IC2 :
20 pin XTI
1 pin DSD_BCK
6 pin DSD_R
9 pin DSD_L
Check the PWM output signal of the STA309A AUDIO processor
MAIN PCB
• IC102 : STA309A 49, 50 pin PWM waveform L CH
47, 48 pin PWM waveform R CH
Check the Audio output signal of the STA309A AUDIO processor
• IC101 : 7 pin (L CH), 1 pin (R CH)
Check the MUTE circuit.
MAIN PCB
• Q106, Q107, Q113, Q114 : 2 pin (BASE)
or
• R141,0R142, R150, R151
Make sure the voltage for the points above is
"Lo" level O.K.?
Replace each device.
MAIN PCB
• Q106, Q107, Q113, Q114
OK
OK
OK
OK
OK
Check Soldering or replace for the following parts.
MAIN PCB
• IC102 : 3, 12, 44, 52, 59 309_+3.3V_
• IIC113 : OUT
Check Soldering or replace for the following parts.
Audio signal (for PCM) for the STA309A AUDIO processor
• IC102 : 11 pin STA309_BCKO
10 pin STA309_LRCKO
9 pin STA309_DOUT
• CP102 : 23 pin CY920_BCK/DSD_BCK
• IC107 : 13 pin STA309_LRCKO
14 pin STA309_DOUT
Audio signal (for DSD) for the STA309A AUDIO processor
• IC102 : 20 pin XTI
1 pin DSD_BCK
6 pin DSD_R
9 pin DSD_L
• IC107 : 11 pin DSD_SCKO
• CP102 : 23 pin CY920_BCK/DSD_BCK
22 pin CY920_DSDR
21 pin CY920_DATA/DSDL
• IC103 : 5 pin CLK
• Replace the IC102 : STA309A
Check Soldering or replace for the following parts.
• IC101, IC102
Check the MUTE circuit.
MAIN PCB
• Q112 : 2 pin (BASE)
or
• IC112 : 72 pin PRE_OUT_MUTE
Make sure the voltage for the points above is
"Lo" level O.K.?
NG
NG
NG
NG
NG
44