cambridge a4 output update

[homertooties]

Hi everyone here is an update to my previous problems with the cambridge a4...

left channel is very quiet and distorted ,right channel is fine


lots of parts changed,new output stage fitted,rails are lower than normal due to transformer change.....

SAP15 N left channel SAP15 P Left channel

B + 714 MV E - 7MV
D + 7 MV S - 9MV
C +38 VDC C - 38VDC
S + 6 MV D - 16 MV
E + 7 MV B - 1.038MV

ACROSS BIOS POT - 9MV AND 17 MV
- SIDE OF 3V3 ZENER - 38 VDC + SIDE -35VDC


SAP15 N Right Channel SAP15P Right

B + 1.267MV E - 45MV
D + 561 MV S - 28 MV
C + 38 VDC C - 38VDC
S + 63 MV D - 342 MV
E + 45 MV B - 1.169 MV


ACROSS BIOS POT ON RIGHT CHANNEL
+ 340 MV AND + 555 MV

- SIDE OF 3V3 ZENER - 38 VDC + SIDE - 35 VDC

Any help in locating fault would be fantastic ...🙂 🙂

 

[homertooties]

Hi there i have posted link of previous troubles with this amp.....Thankyou in advance





http://www.diyaudio.com/forums/showthread.php?s=&threadid=136911