Denon RCD-M40

2. No sound or noise is output
2.1. CD playback
Check Power Supply Voltages for CD.
DIGITAL PCB
• D+3.3V [IC22]: 2 pin 3.3V OK?
• +1.5V [IC23] : 2 pin 1.5V OK?
Check Power Supply Voltages for DAC.
INPUT PCB
• [IC52] :1, 8, 20 pin 3.3 V OK?
• [IC56] :2 pin 3.3 V OK?
Check Reset signal for CD.
DIGITAL PCB
• [IC21] : 69 pin RST "
Hi
" level O.K.?
• [IC11] : 24 pin DSP_RST "
Hi
" level O.K.?
Check Oscillation waveform.
DIGITAL PCB
• [IC21] : 49 pin XO
16.9344 MHz OK?
Check clock signal for DAC.
INPUT PCB
• [IC52] : 12 pin SCK
12.288 MHz OK?
Check control signal for DAC.
INPUT PCB
• [IC52] : 17 pin XSMT (Mute) "
Hi
" OK?
Check Power Supply Voltages for CD.
DIGITAL PCB
• [PMUP] : 1, 2 pin +8 VM
• [PMMO] : 6, 7 pin USB_5 V
POWER PCB
• [CN92] : 6 pin DC_9 V
Check soldering.
DIGITAL PCB
• [BN97] : 1, 2 pin +8 VM
• [CN93] : 6, 7 pin USB_5 V
• POWER PCB
Check soldering.
• [IC22] on DIGITAL PCB
• [IC23] on DIGITAL PCB
Check parts.
• [IC22, IC23]
Check soldering.
• [BN94] : 1 pin SW+5V
• POWER PCB
Check soldering.
• [IC11] : 24 pin CD_DSP_RST on DIGITAL PCB
Check soldering.
• [X201] on DIGITAL PCB
Check soldering.
• [IC51] on INPUT PCB
• [IC52] on INPUT PCB
Check soldering.
• [IC11] on DIGITAL PCB
• [CN62] : 8 pin DAC_XSMT
• [BN62] : 8 pin DAC_XSMT
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
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