Marantz CD6006, Service Manual

Page: 35 / 64

3.1. No sound is output when a USB, iPod is played back.
Is the MAIN PCB connector disconnected?
• [CWC100, CWC101, CN1101, CN2101, CN2801]
Connect the connectors correctly.
Is the USB DSP IC power supply on the MAIN PCB
normal?
• [IC105] 9pin, 14pin, 22pin, 39pin, 43pin (+3.3V)
Check the POWER PCB regulator [U3901] (+3.3V_
D) as well as the solder of any circuits that carry
this load; replace any faulty parts.
Is the USB DSP IC reset signal of the MAIN PCB
being input as “Hi” (+3.3V)?
• [R118]
Check the USB DSP circuit of the MAIN PCB as
well as the solder of any circuits that carry this
load; replace any faulty parts.
Is the USB DSP IC digital communication signal
of the MAIN PCB normal?
• [R198] (USB_RTS)
• [R199] (USB_CTS)
• [R200] (USB_SO)
• [R201] (USB_SI)
(For details see " 3.4. USB DSP communication
waveforms ")
Check the IC below the MAIN PCB as well as the
solder on any circuits that carry this output load;
replace any faulty parts.
• [IC302] (40pin, 66pin, 67pin, 68pin, 69pin,
70pin, 71pin)
• [IC302] (1pin, 2pin, 3pin, 4pin, 5pin)
Is the USB data (+/-) of the USB DSP IC on the
MAIN PCB normal?
• [R213] (DP)
• [R212] (DM)
(For details see " 3.5. USB for data waveform ")
Check the IC below the MAIN PCB as well as the
solder on any circuits that carry this output load;
replace any faulty parts.
• [IC105] (40pin, 41pin)
Is the USB DSP IC digital input signal of the MAIN
PCB normal?
• [IC102] (13pin USB_DATA)
• [IC105] (32pin SCLK), (34pin LRCK)
(For details see " 2.2. FLD control waveform ")
Check the IC below the MAIN PCB as well as the
solder on any circuits that carry this output load;
replace any faulty parts.
• [IC105] (31pin, 32pin, 34pin)
• [IC102] (13pin)
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Is the digital signal to the DAC IC on the MAIN
PCB normal?
• [R324] (DATA0)
• [R325] (BCK0)
• [R327] (LRCK0)
• [R370] (MCLK)
(For details see " 3.2. DAC input signal wave-
form ")
Check the IC below the MAIN PCB as well as the
solder on any circuits that carry this output load;
replace any faulty parts.
• [IC304] (3, 4, 5, 6pin MCLK)
• [IC102] (12pin DATA)
• [R154] (BCK)
• [R160] (LRCK)
Is the DAC IC power supply on the MAIN PCB
normal?
• [C3512] + side (+3.3V)
• [C3509] +side (+5V)
Is the FFC disconnected from the connector?
• [CN2101] (MAIN PCB)
• [BN2101] (AUDIO PCB)
Is the solder of the [IC3504] (DAC) on the AUDIO
PCB normal?
Is the analog signal being output from the AU-
DIO PCB?
• [R3101] (L+), [R3102] (L-), [R3201] (R+), [R3202]
(R-)
Check the solder around the DAC IC circuit of the
PCB; replace any faulty parts.
• [IC3504]
Check the regulator [IC3501] (+5V_D), [IC3502]
(+3.3V_D) and the solder of any circuits that
carry this output load on the AUDIO PCB; replace
any faulty parts.
Connect the FFC correctly.
Check Soldering or replace for the following
parts.
Is the mute signal being output as LOW (-12V)
from the AUDIO PCB?
• [D3109] cathode side (-12V)
Check the solder around the mute circuit of the
AUDIO PCB; replace any faulty parts.
• [Q3114, Q3115, Q3214, Q3215]
YES
YES
YES
YES
NO YES
NO
NO
NO
NO
YES
35
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating