Sansui AU-517 power voltage differences than the service manual

[ReisDaddy]

Hello all, i just bought this Sansui AU-517, and have difference voltage than the service manual. Sound is ok, should i worry? I just do a full electrolytic recap except the big one and in phono board / EQ board (F-2723).
I'm not apro EE. just a bit knowledge.


Here is my tested point in some area so far and my notes

(blue marking is left channel, red marking is right channel, pencil marking is real result from multimeter)

Position (Left Channel)	Service Manual	Digital Multi Meter	Position (Right Channel)	Service Manual	Digital Multi Meter
01	35.5	41 vac	02	35.5	41 vac
03	35.5	41.2 vac	04	35.5	41 vac
C05 (+)	46	50	C06 (+)	46	50
C07 (-)	-46	49	C08 (-)	-46	-50
15	31	32	16	31	-31.8
19	-31	-32	20	-31	-32

From the transformer already far? 41vac instead of 35.5vac.


Here is the driver board F-2721 (left) and F-2722 (right)
That im focus the voltage from power supply

Board	Position	Service Manual	Digital Multi Meter
F-2721	12	51	55
	04	-51	-55
F-2722	12	51	55.4
	04	-51	-55.4

No distortion to my ears.
Should i worry?

Thank you for your time guys.
Please help and ask what another information should i prepare.

 

[avionic]

Your schematic is for a 100 vac Japan model.. What is your local mains AC ? If its more than 100VAC that would explain the slight increase in your other voltage readings.

 

[ReisDaddy]

@avionic Local is 220v

 

[avionic]

Is it actually 220 ? What does it measure with your multimeter ?

 

[ReisDaddy]

@avionic wall is 238 vac
I never seen this high. Usually 220 ish

 

[dimanag]

the 220v at least here in europe is much higher for some years now!
so the wise thing is (for me at least) to change the jumper for 240v.

 

[ReisDaddy]

@avionic @dimanag Wow... it solved! Changed to 240v, then all close to the service manual. That in service manual 31, my reading 32, now is 31.2, theother area that in service is 46, my reading was 49-50 now is 46.ish.

Thank you so much guys. I can sleep well now...

 

[avionic]