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Old 29th November 2004, 07:55 AM   #1
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Question Help!!! Marantz CDP no sound output!!!

I bought old Marantz CD-73 several days ago; it can play CD but no audio output!

(Marantz CD-73 architecture is similar PHILIPS CDP, Chipsets: TDA1540, SAA7000, SAA7010, SAA7020, SAA7030)

I do these troubleshooting:
1) Check OPA NE5532 no any signal input when CDP playing.

2) Check all power condition is normal.

3) Check SAA7000 clock is normal.

4) Check SAA7010 pin "HF input 1Vp-p with 2VDC signal when CDP playing.

5) Found SAA7030 output pin status:
(a) Pin "CLFD" always LO
(b) Pin "LAT" always LO
(c) Pin "DRFD" always HI

6) Found SAA7030 input pin status:
(a) Pin"CLCF" always LO
(b) Pin"STRI","DLCF","DRCF" always have digital signal input.

7) Check "Mute" signal is normal.

Who can tell me how to further troubleshooting? Please help me!!! Thank you!
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Old 29th November 2004, 02:18 PM   #2
TDA1540 is offline TDA1540  Netherlands
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have you checked the CLCFsignal at the output of the saa7000?(pin14)
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Old 29th November 2004, 03:17 PM   #3
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Yes! The SAA7000 pin14 CLCF is connect to SAA7030 pin18 CLCF,and CLCF always at LO level.

I found SAA7020 pin36 UNEC is at LO level when CD playing.

Signal flow :
Transport CDM-0 "HF"--->SAA7010-->SAA7020-->SAA7000-->SAA7030-->Dual tda1540-->OP NE5532
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Old 29th November 2004, 05:32 PM   #4
TDA1540 is offline TDA1540  Netherlands
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Hi Kevin,

does pin14 (saa7000) output anything if it is disconnected?

and how about pin16?soldering ok?
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Old 29th November 2004, 11:58 PM   #5
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Strangely! I remove chip SAA7030 and check SAA7000 pin14 CLCF is available!
Re-Install SAA7030 and pin18 CLCF is available, too!

But, SAA7030 output status: (a) pin8 CLFD still always Hi (b) pin7 LAT still always LO (c) pin10 DRFD still LO
There is no data input to DAC TDA1540!

I remove two TDA1540 and check SAA7030 output pins again, but status still fails!
The chip SAA7030 is malfunction?

SAA7020 pin36 UNEC always LO level when CD playing.The condition is ok?


Thanks your further guidance!

ps. (SAA7000 pin16 "14/16 test is connect to ground and condition is normal ! )
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Old 30th November 2004, 06:28 AM   #6
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I have another CDP Philips CD-204, remove chip SAA7030 and replace on Marantz CD-73.

It works! So, I am sure chip SA7030 malfunction!

But, I have another problem: Who have selling SAA7030? Help! Somebody can tell me?
Thanks!
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