Carver PM-350 Schematic

stereostory · 27th January 2011, 05:51 PM

Looking for schematic for carver pm-350. This amp goes into 'protect' as soon as it is powered up. I started troubleshooting, and I have found that the resistance on the secondary legs of the transformer are reading under 1 ohm (red & orange). This doesn't seem right. I also found a few diodes that are passing voltage both ways... anyone? Thanks!

llwhtt · 27th January 2011, 06:30 PM

PM me with your email, I have the whole Service Manual.

Craig

stereostory · 28th January 2011, 05:47 PM

Thanks Craig.
Going through the test procedure in section 5 of the manual. Here are the values I have come up with thus far:

(RP-100 & RP-200 bias controls for minimum idle current: fully CCW. RP-1 minimum secondary voltage: fully CCW. Level pots: fully CW)

readings:
+/-33.7VDC on large filter caps
+/-37.4VDC on cathode of D19 and anode of D21
+/-14.3VDC on cathode of D15 and anode of D17
+/-3.22VDC on U2 pins 4 and 8
+/-3.8VDC on U101 pins 4 and 8

27th January 2011, 05:51 PM	#1
stereostory diyAudio Member Join Date: Jan 2011	Carver PM-350 Schematic Looking for schematic for carver pm-350. This amp goes into 'protect' as soon as it is powered up. I started troubleshooting, and I have found that the resistance on the secondary legs of the transformer are reading under 1 ohm (red & orange). This doesn't seem right. I also found a few diodes that are passing voltage both ways... anyone? Thanks!

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27th January 2011, 06:30 PM	#2
llwhtt diyAudio Member Join Date: Jun 2008	PM me with your email, I have the whole Service Manual. Craig

28th January 2011, 05:47 PM	#3
stereostory diyAudio Member Join Date: Jan 2011	Thanks Craig. Going through the test procedure in section 5 of the manual. Here are the values I have come up with thus far: (RP-100 & RP-200 bias controls for minimum idle current: fully CCW. RP-1 minimum secondary voltage: fully CCW. Level pots: fully CW) readings: +/-33.7VDC on large filter caps +/-37.4VDC on cathode of D19 and anode of D21 +/-14.3VDC on cathode of D15 and anode of D17 +/-3.22VDC on U2 pins 4 and 8 +/-3.8VDC on U101 pins 4 and 8

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