Denon RCD-M40 Service Manual page 36

2.3. AM/FM TUNER input
Check Power Supply Voltages for PREANM and POWER AMP.
• INPUT PCB : +12 V, -12 V
• AMP PCB : +34 V, -34 V
Check Power Supply Voltages for AM/FM TUNER.
INPUT PCB
• [BN94] : 1 pin SW+5V
Check Analog Audio Data output from TUNER PACK.
INPUT PCB
• TU_Pack [TM51] : 1 pin TU_L, 2 pin TU_R
Check Analog Data input to Function IC.
INPUT PCB
• [IC53] : 3, 30 pin TU_L, TU_R
To mark the CD playback( z ).
OK
OK
OK
OK
Check soldering.
• [BN94] : 4, 7 pin +12 V, -12 V on INPUT PCB
NG
• [BN73] : 5, 6, 9, 10 pin +34 V, -34 V on AMP PCB
• POWER PCB
• SPEAKER PCB
NG
Check soldering.
• [BN94] on INPUT PCB
• POWER PCB
NG
Check soldering.
• TU_Pack [TM51]
NG
Check soldering.
• [IC53] on INPUT PCB
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