Right on - the fan's working. Now that I understand that the NTC on the heatsink is the trigger, I applied my heatgun to the heatsink at the NTC's location. Within a few seconds, the fan started up. So, the circuit is confirmed functional - that problem's solved! I'll recheck the No-load current again. Now, any ideas about the AC voltage

Thanks Martin, I disassembled the entire rear heatsink piece, cleaned off all the old hardened paste, and cut new heatsink film for each transistor. I'll let it run now, and see what happens. The little NTC on the heatsink is a 330Kohm unit, currently measuring 247Kohm - clearly visible in the picture. There is also a 15ohm PTC on the motor PCB

I have almost completed a full restoration of a BeoMaster 5000 - type 2322. All electrolytic and tantalum caps were replaced mostly by Panasonic FC's and FM's, and a couple of Nichicons and WIMA's , and all trimpots were replaced by Bourns 3352 Cermet units. The 2 large Power cans - 10,000uF 63V - were replaced by Cornell Dubilier units

After you've finished cleaning, spray some Silicon Spray on the plastic - it will enhance the appearance to like new. Menahem

Yes you can! Tape In/Out are Line-level connections, which is the industry standard for connecting all types of audio signals - TV, VCR, DVD, MP3, Computer, CD, whatever you like. You just need a Din-cable - Din-5 on the B&O end, and whatever at the other end to suit your appliance. Menahem

Hi Bryan, You're right in there being a sensor - there's an auto-stop mechanism, which triggers a solenoid to disengage the play, if a reed switch is not closed. This reed switch is held closed by the electromagnetic force created by a rotating ferrite wheel in close proximity to the reed switch. You need more than 1 belt, and member Dillen

Yesterday, I just finished replacing every electrolytic capacitor (plus a couple of film caps) and every single trimpot on a customer's treasured BeoMaster 5000 - close enough to the BeoMaster 7000. Exactly 2 trimpots and 3 capacitors did NOT need to be replaced..... So, all were done anyway - no need to be cheap here, and I'm certainly not

Hey Jens Very good explanation - you don't need to look for a technician's shop - I think you are the technician now! Menahem

Hi Martin, Of course you're right about the high-freq distortion and noise. But I did a test on a few CD's before I did the mod - I have a few original CD's which were not well recorded (by the factory), and before the mod, I could hear high-freq distortion. And, I checked on some other top-quality CD's, which have no high-freq distortion

Thanks Jens I'll start with your recommendations for cleaning and lubeing. Menahem