Marantz CD94 Help!!!!

pollidel · 22nd July 2010, 05:38 AM

Hi Folks,

I am a Marantz CD94 user from South Korea.
Could anyone let me know how much the original value of resistors are?
I blew out my beloved CDP by ridiculous mistakes.
It would be really helpful if anybody shows me close-up photos of resistors to read the value.

Lastly, what section is the resistors in? Powersupply or signal path?

Thank you for your help in advance.

Regards,
Kim

pollidel · 22nd July 2010, 08:12 AM

2 resistors are pointed on the image!!
I guess the section is output stage related with OP amp, right?

tonimxp · 22nd July 2010, 10:38 AM

Hi!Please can tell me how are called on the PCB?
For example C25 or C followed by a number, if I find I can communicate the value of the wiring diagram.

pollidel · 22nd July 2010, 11:38 AM

Hi! Thanks for your reply Tonimxp!
R831,832 are written on the PCB. In addition, I think R801,802 needed to be replaced. Thanks again!

pollidel · 22nd July 2010, 11:53 AM

Hi! Thanks for your reply Tonimxp!
R831,832 are wrriten on the PCB.
In addition, I think R801,802 needed to be replaced.
Thanks again!!!

oshifis · 22nd July 2010, 01:15 PM

I had the same problem. These resistors are of a few ohm (3.9 ohm if I remember well) fusible that are blowing out by overcurrent. They are connected between the transformer and both AC sides of the rectifier bridges for the +/-12V and +/-13.5V. The blown resistors on your picture do not seem original. They should not show any burning, just go in open circuit when blown. Since I could not find any replacement, I simply bridged (short-circuited) them. No problem so far...

pollidel · 23rd July 2010, 04:01 PM

Thanks for your kind insturction!
I will try the same way as yours if I can not get the replacement.

There is one more question.
You mentioned the value is 3.9 ohm. Please see the attachment.
R832,831 is marked 1 ohm on the service manual.
Which one is right? I am a bit confused.
If it is just a fuse resistor(not affect to voltage change...)
1 or 3.9 ohm both would be fine,right?
(Sorry for ignorance , I am not an expert...)

tiefbassuebertr · 23rd July 2010, 07:27 PM

go to
Philips CD960 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine
to download the Service Manual from Philips CD-960.
The differences between CD960 and this model from Marantz is only the outline.

Various threads already exist concerning this both models:
Help with Philips CD960
CD960 tray problem...
Philips CD-960
Philips CD 960

Non oversampling cd-94 MK1
Looking for Marantz CD-94 schematic
Identifying a CD94 Mk2?

fastvideo · 24th July 2010, 12:23 PM

Quote:

Originally Posted by pollidel

R832,831 is marked 1 ohm on the service manual.

Check my service manual and confirm R832,831 is 1 ohm fusible resistors.

I would check if there are any short on both lines of supply from this two resistors, remove and clean all corroded glue on the circuit board.

pollidel · 24th July 2010, 02:40 PM

Many Thanks Tiefbassuebertr and Fastvideo!

24th July 2010, 02:40 PM	#10
pollidel diyAudio Member Join Date: Jul 2010	Thanks! Many Thanks Tiefbassuebertr and Fastvideo!

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22nd July 2010, 08:12 AM	#2
pollidel diyAudio Member Join Date: Jul 2010	2 resistors are pointed on the image!! I guess the section is output stage related with OP amp, right?

22nd July 2010, 10:38 AM	#3
tonimxp diyAudio Member Join Date: Oct 2007	Hi!Please can tell me how are called on the PCB? For example C25 or C followed by a number, if I find I can communicate the value of the wiring diagram.

22nd July 2010, 11:38 AM	#4
pollidel diyAudio Member Join Date: Jul 2010	Hi! Thanks for your reply Tonimxp! R831,832 are written on the PCB. In addition, I think R801,802 needed to be replaced. Thanks again!

22nd July 2010, 11:53 AM	#5
pollidel diyAudio Member Join Date: Jul 2010	Hi! Thanks for your reply Tonimxp! R831,832 are wrriten on the PCB. In addition, I think R801,802 needed to be replaced. Thanks again!!!

22nd July 2010, 01:15 PM	#6
oshifis diyAudio Member Join Date: Mar 2004 Location: Budapest, Hungary	I had the same problem. These resistors are of a few ohm (3.9 ohm if I remember well) fusible that are blowing out by overcurrent. They are connected between the transformer and both AC sides of the rectifier bridges for the +/-12V and +/-13.5V. The blown resistors on your picture do not seem original. They should not show any burning, just go in open circuit when blown. Since I could not find any replacement, I simply bridged (short-circuited) them. No problem so far...

23rd July 2010, 07:27 PM	#8
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	go to Philips CD960 \| Owners Manual, Service Manual, Schematics, Free Download \| HiFi Engine to download the Service Manual from Philips CD-960. The differences between CD960 and this model from Marantz is only the outline. Various threads already exist concerning this both models: Help with Philips CD960 CD960 tray problem... Philips CD-960 Philips CD 960 Non oversampling cd-94 MK1 Looking for Marantz CD-94 schematic Identifying a CD94 Mk2?

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