Denon RCD-N8

44
TROUBLE SHOOTING
1. OLED dosen't light
Check Reset signal for Main μ-com.
MAIN B'D
• [IC403] : 19pin RESET
"H" level O.K.?
Check Oscillation waveform.
MAIN B'D
• [IC403] : 20pin
12MHz OK?
Check Power Supply Voltages for OLED.
MAIN B'D
• [CN408] : 7pin +18V_OLED
• [CN401] : 2pin +16V_OLED
• [CN401] : 1pin +3.3V_D1
Check Power Supply Voltages for System µ-com.
MAIN B'D
• +5V_SMPS1 [CN408] : 9pin
• +3.3V_CPU, [IC402] : 4pin
Check Drive Signals for OLED.
DISPLAY B'D
• [CN661] : D0-D7,EL_RD,EL_RW,EL_DC,EL_CS,EL_RST
END
Check Soldering.
• [IC402] on MAIN B'D
• [CN408] : 9pin
• SMPS B'D
Check Soldering.
• [IC404],[IC403]
Check Soldering.
• [RES401] on MAIN B'D
Check Soldering.
• [IC406] on MAIN B'D
• [CN401] on MAIN B'D
• [CN661] on DISPLAY B'D
• [CP661] on DISPLAY B'D
Check Soldering.
• [IC403] on MAIN B'D
• [IC401] on MAIN B'D
• [CN661] on DISPLAY B'D
• OLED MODULE
NG
NG
NG
NG
NG
OK
OK
OK
OK