Check Power Supply Voltages for DIR.
MAIN PCB
•[IC22]:46pin
+5V_A
•[IC22]:22, 36, 42pin
+3V_D1
OK.?
Check Power Supply Voltages for AMP IC.
AMP PCB
•[IC70]: 1, 36, 18, 19pin
+12V_5142 OK?
•[IC70]: 21, 26, 29, 34pin
+29V OK?
Check Power Supply Voltages for PWM CONTROLLER AMP PCB.
MAIN PCB
•[IC23]: 9, 14, 35, 50pin
+3.3V_5558 OK?
Check Reset signal for DIR.
MAIN PCB
•[IC22]: 34pin DIR RESET
"Hi" level OK.?
Check Reset signal for PWM CONTROLLER.
MAIN PCB
•[IC23]: 11pin RESET
"Hi" level OK.?
Check Reset signal for AMP IC.
AMP PCB
•[IC70]: 5,15pin VALID
"Hi" level OK.?
Check Oscillation waveform.
MAIN PCB
•[IC22]: 40pin TXO
24.576MHz OK?
Check Oscillation waveform.
MAIN PCB
•[IC23]: 11pin MCLK
MCLK OK?
Check the solder and replace any faulty parts.
•[Q222]:IN / OUT:+5V_A
•[IC27]:IN:+5V / OUT:+3V
•MAIN PCB
Check the solder and replace any faulty parts.
•[L215]:+3V3_5558
Check the solder and replace any faulty parts.
•[IC28]:68pin DIR_RESET on MAIN PCB
Check the solder and replace any faulty parts.
•[IC28]:77pin A_PWM_RST on MAIN PCB
Check the solder and replace any faulty parts.
•[IC23]:37pin VALID on MAIN PCB
•[WF72]:12pin VALID
Check the solder and replace any faulty parts.
•[X201] on MAIN PCB
Check the solder and replace any faulty parts.
•[IC22]:20pin → [IC23]:63pin DIR, MCLK
Check the solder and replace any faulty parts.
•[PF72]:6pin:+12V_5142
•[BN91]:1, 2, 3pin:+29V
•AMP PCB
NG
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
OK
2.2. COMMON(POWER Control signal)
37
Содержание CEOL RCD-N9
Страница 34: ...Personal notes 34 ...
Страница 45: ...Personal notes 45 ...
Страница 77: ...TC7USB40MU NETWORK IC62 TC7USB40MU Block Diagram 77 ...