[TechAssist] Re: Symphonic TV/VCR MD. TVCR13F1 PS Problem
- From: Joe Batchelor <jbc@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 27 Dec 2002 00:57:05 -0600
>>D-624 in PS shorted. Numbers on diode are R2M
This is a safety diode in case the power supply goes too high
it will short. I think the supply usually runs about 120VDC.
You need to be careful about the caps in the chopper supply.
If one is bad it will allow the supply to run wild.
Fix the supply before changing the zener diode.
You probalby will want to run it on a dummy load to test.
The 150 volt zener will work or the ECG will work or the R2M will work.
The diode is really not in the circuit untill you have a fault.
Joe Batchelor CET TX-80
12/26/02 11:38:40 PM, "Mitchs Electronics" <Mitchstv@xxxxxxxxxx> wrote:
>
>Ok Jack you even got me curious.
>The 150 volt zener must go to a cap, or base of chopper or fet? I've seen
>lots of 150 volt zeners in Funi, Symphonic power supplies but no Avalanche
>diodes. Its obvious their not identical power supplies. Lots of these parts
>wont cross since their china made and they don't follow the same guidelines
>as Korean or Japanese semiconductors manufactures.
>I thought that model sounded familiar I looked and have the Funi/Symphonic
>manual for TVCR13G1/F13TRG1 their isn't a D624 listed in parts or is their
>any 150 volt zeners or Avalanche diodes either.Power supply listed hear is a
>oesa02013. Some 15 volters listed. What's the voltage drop across the
>working Zener?
>Rick Mitchell
>Mitch's Electronics Ser.Co.
>Mitchstv@xxxxxxxxxx
>3935 south 20th
>Lincoln, Nebraska 68502
>----- Original Message -----
>From: "David Lessard" <mrfixit@xxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Thursday, December 26, 2002 10:42 PM
>Subject: [TechAssist] Re: Symphonic TV/VCR MD. TVCR13F1 PS Problem
>
>
>
>Jack,
>
>So what your saying is that you have two identical PS's with two different
>diodes in the same place D624, that doesn't make any sense at all. Are you
>sure the PS's are identical, cause if they are you already have the answer
>to your question.
>
>Alexandria Electronics
>Ontario, Canada
>mrfixit@xxxxxxxxxxx
>
>-----Original Message-----
>From: techassist-bounce@xxxxxxxxxxxxx
>[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of jac
>Sent: Thursday, December 26, 2002 10:21 PM
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Symphonic TV/VCR MD. TVCR13F1 PS Problem
>
>
>
> D-624 in PS shorted. Numbers on diode are R2M. This crossed to ECG
>570, an avalanche diode, VRM-130V. I did a price check on this diode at
>Tritronics and it showed $17.++. I have a PS just like it that I stuck
>in the set and everything else works
>ok. I checked D-624 in my PS and the numbers on it were1Z150. I crossed
>that to an
>ECG5100A. That is a Zener diode 150volt, 1W. The ID. numbers on both
>boards are the same. Could anyone tell me what the difference is and
>which diode would be the
>best to replace the bad one with? Thanks
> Jack Latimer
> Jacks TV- jac@xxxxxxxxxxx
> Cahokia, IL.
>
>
>
>
>------------------------------------------
>Submit A Repair Tip For Everyone Here:
>http://www.tech-assist.org/secure/tip/main.html
>------------------------------------------
>To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
>To CHANGE your email address, click here:
> http://www.techassist.net/forms/change.html
>
>------------------------------------------
>Submit A Repair Tip For Everyone Here:
>http://www.tech-assist.org/secure/tip/main.html
>------------------------------------------
>To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
>To CHANGE your email address, click here:
> http://www.techassist.net/forms/change.html
>
>
>
>
>------------------------------------------
>Submit A Repair Tip For Everyone Here:
>http://www.tech-assist.org/secure/tip/main.html
>------------------------------------------
>To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
>To CHANGE your email address, click here:
> http://www.techassist.net/forms/change.html
>
------------------------------------------
Submit A Repair Tip For Everyone Here:
http://www.tech-assist.org/secure/tip/main.html
------------------------------------------
To REMOVE your email address, click here:
http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
http://www.techassist.net/forms/change.html
Other related posts:
