Search found 8 matches

by karol96
Tue Mar 13, 2018 2:51 pm
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

Hello As the machine is happier, I'm also happy. I was making some audio recording tests - the quality is pretty good. But no all tension problems are gone. Tension arms are in my opinion adjusted correctly, but rewind doesn't work well. After pressing shuttle and turning a knob couterclockwise, ree...
by karol96
Sat Mar 10, 2018 6:56 am
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

Hello And I have also solved problem with movable guides. Pin was broken in socket connector on reed switches board. After replacing the socket, guides are working properly. I have a question about something different. How is it with audio quality in this machine? I know, this is a video recorder, b...
by karol96
Fri Mar 09, 2018 12:06 am
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

Hello I have just found a reason, why such a strange things were happening. No IC is broken. It was such a easy reason: the power cables for T-Tension were flipped. Why, I don't know. I am not the first person which tries to repair this machine. I am pretty sure, that the man which was repairing the...
by karol96
Thu Mar 08, 2018 10:52 am
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

Hello I have just made some more measurements. The resistance between 1 and 3 pin of T-tension sensor is 15.5k and it doesn't change in time. When the machine is switched on, voltages on pin 1 and 3 are +4.57 and -4.48. Voltage on pin 2 depends on arm's position, and it changes lineary with a pressu...
by karol96
Wed Mar 07, 2018 4:41 pm
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

[img]Hello Today I made some experiments. I followed all the procedure of tension adjustment,which you described. My results are pretty interesting and strange. When it comes to the T-Tension adjustment. With a 135g weight, I reached 0V on TP13. After tapping the arm, I still had 0V. After replacing...
by karol96
Sun Mar 04, 2018 3:52 pm
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

Hello Sorry, that I didn't reply before, but I hadn't got any time to make any experiments. I made the 3 weights: 85g, 135g and 240g. I also made an extender board. But I have got still some problems. First of all, I tried to calibrate the T-tension arm. So I screwed a weight post into a metal frame...
by karol96
Sat Feb 10, 2018 1:55 am
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Re: Sony BVH2000PS tension adjustment.

Hello I have just made quick research for topics including "Sony". Some of them were pretty interesting, but there is no answer for my questions. I wish someone could give me information about those weights. Without using them, it is pretty difficult (or even impossible) to do the calibration of ten...
by karol96
Fri Feb 09, 2018 11:50 am
Forum: Ask the Engineers
Topic: Sony BVH2000PS tension adjustment.
Replies: 18
Views: 603

Sony BVH2000PS tension adjustment.

Hello everyone. It is my first post there. For couple of days I'm repairing the Sony BVH2000PS machine. The biggest problem I have are those unadjusted tension arms. As it is written in the service manual, I should use special "tension adjustment tool", but I haven't got this tool. So there is my fi...