[TechAssist] Re: Zenith Z25X31D1 (9-1809-01) no green, like bad CRT. FIX
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 4 Aug 2004 09:19:30 -0400
A very common problem.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, August 04, 2004 9:16 AM
Subject: [TechAssist] Zenith Z25X31D1 (9-1809-01) no green, like bad CRT.
FIX
> Knowing Zeniths I was ready to write this one off, as it looked exactly
> like a bad CRT with no green output.
> CRT was OK.
> Down on the main board (9-1809-01) in front of the jungle (ICX2200,
> TA1242N) were three transistors, R,G,B drive Q2204,2205,2206 all 2N3906.
> They feed the three video output transistors on the CRT board. The
> green one was shorted, Q2205. Replaced it and all is well.
> A quick ohms check with my Fluke on the three vid. outputs on the CRT
> board showed one has lower resistance than the others, but after
> removing it it was OK. So I followed on down to the board.
> Phil Bader
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
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