coastman49
- May 1, 2022
- 37
- Joined
- May 1, 2022
- Messages
- 37
I have a Sansui 7070 receiver that I originally purchased in 1976. Used it for about 10 years before putting it away in leu of a AV receiver. I recently brought it out of storage. It still works, but the right channel has low output. I replaced caps on the F2624 driver circuit board. When I attempt the driver board adjustments according to the service manual, Voltage a the speaker terminals with an 8 ohm load, I get .017 volts or 17 mv both sides. Service manual says + or - 10 mv. I can't adjust any farther.
When I do the current bias or output idle current, both channels are very high. On my Fluke 73 Series meter the reading is 24.45 on the right channel and O.L on the left channel I don't have a milliamp input, so the reading is 24.24 . I am assuming my meter auto scales the current readings The unit still works except right channel has low output.
When I do the current bias or output idle current, both channels are very high. On my Fluke 73 Series meter the reading is 24.45 on the right channel and O.L on the left channel I don't have a milliamp input, so the reading is 24.24 . I am assuming my meter auto scales the current readings The unit still works except right channel has low output.