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Marantz CD63 & CD67 mods list
Marantz CD63 & CD67 mods list
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Old 11th September 2019, 08:33 AM   #21171
Miroslaw68 is offline Miroslaw68  Poland
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Hello
I measured voltage in power unit. Results are:
20,8 V on D801, D802 result 21,4 V
-20,8 V on D803, D804 result -21,4 V
11,5 V on D811, D812 result 11,7 V
-12,1 V on D813, D814 result -12,0 V
After voltage regulators
+5 V on U163 result +5 V
+12 V on U218 result +12,1 V
-12 V on U216 result -11,7 V
+10 V on U161 result +11,4 V
-10 V on U162 result -12,2 V
I checked 0,0V on op-amps
RCH 1)-22,3mV 2)1,4V 3)1,4V 7)23,9mV
LCH 1)-15,3mV 2)1,4V 3)1,4V 7)21,8mV
On op-amps I repleaced 4pcs caps Silmic II 220uF/25V
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Old 11th September 2019, 08:37 AM   #21172
Mooly is offline Mooly  United Kingdom
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Marantz CD63 & CD67 mods list
Have you fitted suitable opamps?

What was originally in there and what did you replace them with? Could they be fakes?
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Old 11th September 2019, 12:51 PM   #21173
Miroslaw68 is offline Miroslaw68  Poland
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Voltage results comes with original op-amps 2114.
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Old 11th September 2019, 02:13 PM   #21174
Mooly is offline Mooly  United Kingdom
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Marantz CD63 & CD67 mods list
Another likely problem could be that you have dropped a blob of solder onto the print side of the PCB shorting two points out, possibly around some of the processing chips. Its obviously something that has happened while you have been working on this. Visually go over the PCB very carefully and recheck all your work.
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Old 16th September 2019, 01:10 PM   #21175
Miroslaw68 is offline Miroslaw68  Poland
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Mooly, madis64

Thanks a lot for your support my thinking. You are right, there is not mod failure.
I see my job mistake. To disable headphone circuit instead to remove jumpers U271/272 I have removed U171/172. Stupid mistake
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Old 16th September 2019, 01:36 PM   #21176
Mooly is offline Mooly  United Kingdom
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OK good to hear you've spotted what was wrong.
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