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Check Power Supply Voltages for DIR.
MAIN PCB
• IC107 : 46pin
+5V_A
• IC107 : 22, 36, 42pin
+3V_D1
O.K.?
Check Power Supply Voltages for AMP IC.
AMP PCB
• IC500, IC502 : 1, 36, 18, 19 pin
+12V_5142 OK?
• IC500, IC502 : 21, 26, 29, 34 pin
+29V OK?
Check Power Supply Voltages for PWM CONTROLLER.AMP PCB.
MAIN PCB
• IC108 : 9, 14, 35, 50 pin
+3.3V_5558 OK?
Check Reset signal for DIR.
MAIN PCB
• IC107 : 34pin DIR_RESET
"Hi" level O.K.?
Check Reset signal for PWM CONTROLLER.
MAIN PCB
• IC108 : 11pin RESET
"Hi" level O.K.?
Check Reset signal for AMP IC.
AMP PCB
• IC500, IC502 : 5,15, 15pin VALID
"Hi" level O.K.?
Check Oscillation waveform.
MAIN PCB
• IC107 : 40 pin TXO
24.576 MHz OK?
Check Oscillation waveform.
MAIN PCB
• IC108 : 11 pin MCLK
MCLK OK?
Check Soldering or replace for the following parts.
• IC110 : IN : +12V_A / OUT : +5V_A
• IC113 : IN : ST+5V / OUT : +3V_D1
•MAIN PCB
Check Soldering or replace for the following parts.
• R325 : +3V3_5558
Check Soldering or replace for the following parts.
• IC112 : 68pin DIR_RESET on MAIN PCB
Check Soldering or replace for the following parts.
• IC112 : 77pin 5558 RESET on MAIN PCB
Check Soldering or replace for the following parts.
• IC108 : 37 pin VALID on MAIN PCB
• PF103 : 15 pin Reset
Check Soldering or replace for the following parts.
• X101 on MAIN PCB
Check Soldering or replace for the following parts.
• IC107 : 20 pin → IC108 : 63 pin DIR, MCLK
Check Soldering or replace for the following parts.
• PF103 : 7 pin : +12V_5142
• CN500 : 1, 2, 5, 6 pin : +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)
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