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NAIM CD5x Schematic is needed or enlighten me to fix Ch1 DEAD Audio
NAIM CD5x Schematic is needed or enlighten me to fix Ch1 DEAD Audio
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Old 13th June 2019, 02:40 AM   #1
Peter Qiu is offline Peter Qiu
diyAudio Member
 
Join Date: Sep 2014
Default NAIM CD5x Schematic is needed or enlighten me to fix Ch1 DEAD Audio

Hello All,

I got a NAIM CD5x CD Player with Ch1 DEAD (No Audio)。

I've carried out a preliminary checking on Top Side of the Printed Circuit Board:-
1) Checked working voltage of Op Amps OPA604AP and OP42 at Pin 7(+18VDC) with Pin 4 (Analog Ground)respectively。

2) I used 1KHz Audio Test Disc to confirm Signal Paths at Pin 6 of both Ch1 and Ch2 Op Amps(Output Pin of OPA604AP and OP42) with Oscilloscope and noticed that ONLY Ch1 did not show any Sinusoidal Waveform。

I guess, absence of Ch1 Output Signal was attributed by "Input Source" at Bottom side of the Printed Circuit Board Assembly....in order not to mess around bottom side of PCBA, I would appreciate it if anyone could give me a clue for fixing or provide me a schematic of NAIM CD5x。

Thanking you in advance,
Peter。
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