Marantz CD6006, Руководство по обслуживанию

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Is the MAIN PCB filament out-
put voltage (AC3.6V) normal?
• [FCC300] 16pin (FIP2) -
13pin(FIP1)
Check the rectifier diode [D3932] and the solder on the input side
circuit; replace any faulty parts.
Are the MAIN PCB resistance
[R308] and POWER PCB resis-
tance [R3912, R3915] normal,
and are the diode [D3933]
parts normal?
Check the condition of the
parts and solder; replace any
faulty parts.
2. FLD
2.1. FLD is not lit
Is the VP output voltage
(+25V) for the MAIN PCB nor-
mal?
• [FCC300 15pin] (VP)
Is the MAIN PCB +3.3V_D out-
put voltage (+3.3V) normal?
• [FCC300 18pin] (+3.3v)
Is the transistor collector input
voltage (+49V) for the POWER
PCB normal?
• [Q3901]
Check the solder of the transistor [Q3901] input side circuit; replace
any faulty parts.
Is the POWER PCB regulator
input voltage (+5V) normal?
• [U3901]
Check the transistor [Q3901]
and the solder of circuits that
carry this output; replace any
faulty parts.
Check the regulator [U3901]
and the solder of any circuits
that carry this output load;
replace any faulty parts.
Is the POWER PCB regulator
input voltage (+7V) normal?
• [U3902]
Is the POWER PCB regulator
input voltage (+9V) normal?
• [U3905]
Check the regulator [U3902]
and the solder of any circuits
that carry this output load;
replace any faulty parts.
Check the regulator [U3905]
and the solder of any circuits
that carry this output load;
replace any faulty parts.
Is the FLD [U4003] control waveform of the
FRONT PCB normal?
• 32pin(DIS_SO)
• 33pin(DIS_SCL)
• 34pin(DIS_CS)
• 35pin(DIS_RESET)
(For details see " 2.2. FLD control waveform ")
Check the voltage between 1pin and 2pin on the Main Trans
[T3951] secondary side of the TRANS PCB; replace the Main Trans
[T3951] if there are any abnormalities.
Signal line from MAIN PCB U-COM
• Check the solder of the [IC302] (27pin DIS_
RESET), (29pin DIS_CS), (28pin DIS_SO), (30pin
DIS_SCL) and surrounding circuits.
Replace UCOM if any abnormalities are found.
• [IC302]
Check the condition of the FLD [U4003] pins and solder of the FRONT PCB.
Replace FLD if there are any abnormalities.
NO
NO
NO
NO
NO
YES NO
YES
YES
YES
NO NO
NO
NO
YES
YES
YES YES
YES
NO YES
32
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating