[TechAssist] Re: Sanyo DS19204 no vert
- From: "John Mielke" <maintv2004@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 9 Sep 2005 17:57:33 -0600
I just had a DS25204-01 (similar or same?) that had no vertical deflection.
It turned out to be IC101 LA76843N, a 80 pin surface mount. Apparently this
is a common problem, we had to wait about 2 - 3 months for the chip. I don't
think it was expensive. Sorry, I do not have a schematic for either model.
The vertical out on IC101 is on pin 26. The DS25204 is very similar to
DS25320 in Sams 4801 except the DS25204 gets it's vetical B+ from the smps
off D626 cathode and not from the fly. Let us know what you find, John.
John Mielke
Main TV
636 Main St
Longmont, Co 80501
303 776 6955
303 776 0792 fax
www.longmontmaintv.com
maintv2004@xxxxxxxxxxx
----- Original Message -----
From: <jhoeme@xxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Friday, September 09, 2005 4:22 PM
Subject: [TechAssist] Sanyo DS19204 no vert
> Output IC501 (LA78040N) has 24V on pins 2 and 6.
> All associated components check ok.
> I cannot see any input pulse or ramp on input pins 1 or 7.
> I do not have a schematic.
> Any history on this one?
> TIA
> Jerry Hoeme
> Jerry's TV Service (Estb 1978)
> 840 So. Kansas Ave
> Liberal, KS 67901
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