Fld Doesn't Light - Marantz HD-DAC1 Service Manual

2. FLD doesn't Light

Check DC voltage
FRONT PCB (CUP12687)
WF81 2pin, 3pin : + 3.3V
Check DC voltage
FRONT PCB (CUP12687)
WF81 5pin : + 39V
Check DC voltage
FRONT PCB (CUP12687)
WF81 14pin : + 5V
Check DC voltage
FRONT PCB (CUP12687)
IC81 4pin : +4.2V
Check reset signal
FRONT PCB (CUP12687)
WF81 16pin(_RESET) : +3.3V
Next page
YES
YES
YES
YES
YES
Check DC voltage
NO
MAIN POWER PART PCB(CUP12689-1)
BN92 10pin : +3.3V
NO
Check device
SUB TRANS PCB (CUP12689-2)
IC91 4pin : + 3.3V
NO
Is DC voltage normal?
MAIN POWER PART PCB(CUP12689-1)
BN92 2pin : +39V
NO
Check device
MAIN POWER PART PCB(CUP12689-1)
Q905 Emitter : +39V
Check DC voltage
NO
MAIN POWER PART PCB(CUP12689-1)
BNC92 4pin : +5V
NO
Check device
MAIN POWER PART PCB(CUP12689-1)
IC93 4pin : +5V
NO
Replace IC81.
Check reset signal
NO
DIGITAL PCB (CUP12688)
WF11 16pin (FPRS) : +3.3V
NO
Check Soldering or replace
DIGITAL PCB
IC11
36
YES
Check Wire.
YES
Check Wire.
YES
Check Wire.
YES
Check Soldering or replace
DIGITAL PCB
WF11 and FFC cable