Marantz CD6006, Service Manual

Page: 34 / 64

3. No audio output.
3.1. No sound is output when a CD is played back.
3.2. DAC input signal waveform
Is the MAIN PCB connector disconnected?
• [CWC100, CWC101, PFCK10, CN2101, CN2801]
Is the AUDIO PCB connector disconnected?
• [CN3504, BN2101]
Is the digital signal to the DAC IC on the MAIN
PCB normal?
• [R324] (DATA)
• [R325] (BCK0)
• [R327] (LRCK0)
• [R370] (MCLK)
(For details see " 3.2. DAC input signal wave-
form ")
Connect the connectors correctly.
Connect the connectors correctly.
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.
Insert the FFC.
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]
NO
NO
YES
YES
YES
YES
NO YES
YES
YES
NO
NO
NO
NO
YES
MCLK
BLK
DATA
LRCK
W5
W6
W7
W8
Is the power supply voltage for the CD normal?
MAIN PCB
• [CN2801] (4pin +3.3V_D), [C168] (+1.5V_D),
[C170] (+3.3V_D1). [C171] (+3.3V_D2)
Check Soldering or replace for the following
parts.
MAIN PCB
• [CN2801] (4pin), [L103, IC103] (+1.5V_D), [L105]
(+3.3V_D1), [L106] (+3.3V_D2)
Check Reset signal for CD.
CD PCB
• [IC100] (69 pin) RST "Hi" level O.K.?
Check Soldering or replace for the following
parts.
• [IC302] (91pin DECRST) on MAIN PCB
Check Digital Audio Data.
MAIN PCB
• [IC100], [R137] (LRCK), [R138] (BCK), [R139]
(SCLK), [R140] (DATA)
Check Soldering or replace for the following
parts.
• [IC100] (36pin LRCK, 35pin BCK, 34pin SCLK,
33pin DATA)
YES
NO
NO
YES
YES
YES
34
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating