Marantz CD5005, Руководство по обслуживанию

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2. FLD
2.1. FL TUBE dosen't light
YES
YES
YES
NO
NO
NO
NO
YES
NO
Is the CUP12662Z_A MAIN
PCB VP output voltage
(+25V) normal?
• FCC300 15pin (VP)
Is the CUP12662Z_A MAIN
PCB +3.3V_Doutput voltage
(+3.3V) normal?
• FCC300 18pin (+3.3v)
Is the CUP12662Z_A MAIN PCB filament output
voltage (AC3.6V) normal?
• FCC300 16pin(FIP2) - 13pin(FIP1)
Is the FLD (U4003) control waveform of the
CUP12663Z_4 FRONT PCB normal?
• 32pin(DIS_SO)
• 33pin(DIS_SCL)
• 34pin(DIS_CS)
• 35pin(DIS_RESET)
(For details of the control waveform, see "2.2. FLD
Control Waveform" .)
Check the voltage between the secondary side 1pin – 2pin
of the CUP12663Z-6 TRANS PCB Main Trans (T901), and
replace the Main Trans (T901) if any abnormalities are found.
FL TUBE
dosen't light.
Is the input voltage (+49.3V)
of the CUP12663Z-1 POWER
PCB transistor collector
normal? • Q3901
Check the input side circuit and
soldering of the transistor (Q3901),
and replace any faulty parts.
Is the regulator input voltage
(+5.13V) of the CUP12663Z-1
POWER PCB normal?
• U3901
Is the regulator input voltage
(+7.14V) of the CUP12663Z-1
POWER PCB normal?
• U3902
Is the regulator input voltage
(+9.22V) of the CPU12663Z-1
POWER PCB normal?
•
U3907
Check the input side circuit and
soldering of the transistor ( D3950 ),
and replace any faulty parts.
Are the CUP12662Z_A MAIN
PCB resistance (R308),
CUP12663Z-1 POWER PCB
resistance (R3912, R3915) and
diode (D3933) parts normal?
Signal Line from the CUP12662Z_A MAIN PCB UCOM
• Check the soldering of the IC302 66pin(DIS_RESET),
68pin(DIS_CS), 67pin(DIS_SO), 69pin(DIS_SCL) and
surrounding circuits. Replace the UCOM if any abnormalities
are found.
•
IC302
Check the circuit and soldering of
the transistor (Q3901) and output
load, and replace any faulty parts.
Check the circuit and soldering of
the regulator (U3901) and output
load, and replace any faulty parts.
Check the circuit and soldering of
the regulator (U3902) and output
load, and replace any faulty parts.
Check the circuit and soldering of
the regulator (
U3907
) and output
load, and replace any faulty parts.
NO
NO
NO
NO
YES
YES
YES
YES
Check the condition and soldering of the FLD (U4003) of the
CUP12663Z-4 FRONT PCB.
Replace the FLD if any abnormalities are found.
Check the condition and soldering
of the parts, and replace any
faulty parts.
NO
YES
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