Re: Power Supply Sony KV32S12

R607 1-202-933-61
Q601/602 8-729-019-49
Q502 8-729-035-75
C611/612 1-136-169-00
D648 8-719-057-52
R622 1-212-958-00
VDR601 1-810-974-21

Make sure to check the soldering around and including the LOPT, H-Driver
Transformer, and the numerous loads off the LOPT S/A R551,557,536, D530,531,
Etc. BTW this power supply can be run up on a variac without being connected
to the main board to confirm operations.
"Leonard Caillouet" <no@xxxxxxxxx> wrote in message
news:wolpe.102250$J25.65577@xxxxxxxxxxxxxxxxxxxxxxxxx
>I posted the following message on May 30, the same day that you first
> inquired...
>
> You sound like a tech. Where are you located and what kind of work do you
> typically do?
>
>
> Start the PS up slow and as soon as it starts switching note the
> frequency.
> If it is below about 50kHz be careful. I have seen these sets with surge
> damage with bad switching transformers and the tend to run slow from the
> start. If it does it will blow the PS again in short order. Also note
> the
> duty cycle of the transistors, which should be within a couple of percent
> of
> 50%. You should really get the training manual on this series of sets if
> you are going to work on them. Once you get to understand them they are
> pretty easy repairs.
>
>
> Check the standby circuit. If VDR601 was shorted, R644 is likely open and
> you need to check the rest of the standby circuit carefully before trying
> to
> start the PS. With external sources of damage I have seen these circuits,
> and the soft start and protect circuits damaged.
>
>
> C609-C612 .22uFd 100V
> R653 1 ohm .25W
>
>
> BTW, Tritronics has many Sony parts on their search engine and if they
> don't
> will do the research for you for free. Other Sony distributors such as
> Andrews and Fulton will do the same.
>
>
> Leonard
>
>
> "Vince" <vmschmitt@xxxxxxxxxxx> wrote in message
> news:bK8pe.50158$rt1.15144@xxxxxxxxxxx
>> Hi!
>> If anyone has a drawing for this set, I am in need of what the values
>> are
>> of C609 610 611&612 and also or R653 which was also blown, I hope this is
>> all that is wrong with this set, I replaced the HOtr and both of the 4834
>> trs, also the VDRs.
>> Thanks in advance for any help I get.
>> Vince
>>
>>
>
>


.