Marantz CD6005 - Page 36

3.4. USB DSP Communication Waveform
3.5. USB Data Waveform
USB_RTS
USB_CTS
USB_SO
USB_SI
W9
E0
E1
E2
DP (D+)
DM (D-)
E3
E4
YES
YES
NO
Is the CUP12551 MAIN B'D DAC IC digital input
signal normal?
• IC304 3pin (DATA)
• R160 (BCK)
• R162 (LRCK)
• R370 (MCLK)
(For details, see "3.2. DAC Input Signal
Waveform".)
Is the CUP12551 MAIN B'D DAC IC power supply
normal?
• C342 + side (+3.3V)
• C353 +side (+5V)
Is the CUP12551 MAIN B'D analog signal output?
• CN2101 4pin(R-), 5pin(R+), 7pin(L+), 8pin(L-)
Check around the CUP12551 MAIN B'D DAC IC
circuit and soldering, and replace any faulty parts.
• IC304
Check the following IC of the CUP12551 MAIN B'D and the
circuit and soldering that handle the output load, and replace
any faulty parts.
• IC304(3pin, 4pin, 5pin, 6pin)
• U1201(4pin, 7pin, 12pin)
• U2101(6pin)
Check the regulator (U3901) +5V_D and regulator (U3902)
+3.3V_D of the CUP12552Z_A-3 POWER B'D and the circuits
and soldering that handle the output load, and replace any
faulty parts.
Is the CUP12552Z_A-3 AUDIO B'D mute signal output as
LOW (-12V)?
• D3109 cathode side (-12V)
NO
NO
YES
YES
Check around the CUP12552Z_A-3 AUDIO B'D mute circuit
and soldering, and replace any faulty parts.
• Q3114,Q3115,Q3214,Q3215
36