Reed
Well-known Member
I progressed further with the recapping of my near dead Sansui QRX 6001 tonight and made some interesting discoveries.
First it is obvious that at some point a drink was spilled into this unit. The residue is obvious on the bottom of the circuit board for the fuses. This isn't really a problem, just a note of interest.
Second, I want to replace all the dial illumination fuse type bulb with LEDs, but I don't know what sort of LEDs to get or how to mate them with a resistor to make them work or how to mount the LED in the fuse bulb socket.
Finally, I found that factory service manual schematic for the F-1267 equalizer board had several of the capacitors completely mislabeled. C601 and C602 were labelled as resistors on the PCB but DID have caps in them. Coincidentally, R601 and R602 (located right next to C602 and C602) were labelled as caps but had resistors in them. Also, caps 601, 602, and 609-612 also all had the polarity reversed on the schematic from the polarity printed on the PCB and how the caps were installed in the PCB. I installed the new caps identically to how the old caps were installed, but it just worries me that there is such a huge discrepancy between the factory schematic and the PCB.
Questions:
(1) What sport of cleaning should I do to clean up the spilled drink, if any?
(2) Anybody have a link to a tutorial on how to replace the lamps in a Sansui X-001 with LEDs?
(3) Should I be worried about the discrepancies between the schematic and the PCB?
Thanks for helping an electronics neophyte out.
First it is obvious that at some point a drink was spilled into this unit. The residue is obvious on the bottom of the circuit board for the fuses. This isn't really a problem, just a note of interest.
Second, I want to replace all the dial illumination fuse type bulb with LEDs, but I don't know what sort of LEDs to get or how to mate them with a resistor to make them work or how to mount the LED in the fuse bulb socket.
Finally, I found that factory service manual schematic for the F-1267 equalizer board had several of the capacitors completely mislabeled. C601 and C602 were labelled as resistors on the PCB but DID have caps in them. Coincidentally, R601 and R602 (located right next to C602 and C602) were labelled as caps but had resistors in them. Also, caps 601, 602, and 609-612 also all had the polarity reversed on the schematic from the polarity printed on the PCB and how the caps were installed in the PCB. I installed the new caps identically to how the old caps were installed, but it just worries me that there is such a huge discrepancy between the factory schematic and the PCB.
Questions:
(1) What sport of cleaning should I do to clean up the spilled drink, if any?
(2) Anybody have a link to a tutorial on how to replace the lamps in a Sansui X-001 with LEDs?
(3) Should I be worried about the discrepancies between the schematic and the PCB?
Thanks for helping an electronics neophyte out.