Denon RCD-N7 Service Manual page 40

2. No Sound,Noise generated
2.1. COMMON
Check Power Supply Voltages for CODEC.
MAIN B'D
• [IC41] : 1,20,33,43,50pin
• [IC41] : 18pin
O.K.?
Check Power Supply Voltages for PWM CONTROLLER.
MAIN B'D
• [IC51] : 9,15,36,54pin
VDD +3.3V OK?
Check Power Supply Voltages for AMP IC.
MAIN B'D
• [IC71, IC72] : 1,36,18,19pin
GVDD +12V OK?
• [IC71, IC72] : 21,26,29,34pin
PVDD +29V(Bi-Amp : +19V) OK?
Check Reset signal for PWM CODEC.
MAIN B'D
• [IC41] : 25pin 4683_RESET
"H" level O.K.?
Check Reset signal for PWM CONTROLLER.
MAIN B'D
• [IC51] : 11pin RESET
"H" level O.K.?
Check Reset signal for AMP IC.
MAIN B'D
• [IC71,IC72] : 5,15pin VALID
"H" level O.K.?
Check Oscillation waveform.
MAIN B'D
• [IC41] : 22pin TXO
12.288MHz OK?
Check Oscillation waveform.
MAIN B'D
• [IC51] : 19pin XTL_O
13.5MHz OK?
• [IC51] : 63pin MCLK
MCLK OK?
Check controll signal for CODEC.
MAIN B'D
• [IC41] : 26,27,28pin
4683_CDTI,4683_CCLK,4683_CSN
VDD +5V
VDD +3.3V
OK
OK
OK
OK
OK
OK
OK
OK
OK
Check Soldering.
NG
• [IC13] : 3pin +5V
• [CN45] : 10pin +3.3VD
NG
Check Soldering.
• [CN45] : 10pin +3.3VD
• POWER B'D
Check Soldering.
NG
• [CN45] : 2pin +12V
• [CN61] : 1,2,3pin +29V
• POWER B'D
NG
Check Soldering.
• [IC11] : 102pin 4683_RESET on MAIN B'D
NG
Check Soldering.
• [IC11] : 95pin RESET_5508 on MAIN B'D
NG
Check Soldering.
• [IC51] : 39pin VALID on MAIN B'D
NG
Check Soldering.
• [X401] on MAIN B'D
Check Soldering.
NG
• [X501] on MAIN B'D
• [IC41] : 17pin 5508_MCLK on MAIN B'D
Check Soldering.
NG
• [IC11] : 105,106,107pin
4683_CDTI,4683_CCLK,4683_CSN
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