[TechAssist] Re: [Fwd: 27" TV,Hitachi 24CX3B (no chassis#)clicks only]
- From: Phil Bader <philbad@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 04 Sep 2001 17:55:18 -0400
Found open zener diode D744 near the H. drive transformer T701,diode
located under the SPC module mentioned,must unplug to access diode.Hit
part# is 233982M.
Phil Bader wrote:
>
> -------- Original Message --------
> Subject: 27" TV,Hitachi 24CX3B (no chassis#)clicks only
> Date: Tue, 04 Sep 2001 16:33:30 -0400
> From: Phil Bader <philbad@xxxxxxxxxx>
> Organization: Jan Phyl TV Inc.
> To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx"
> <CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx>
>
> All fuses seem OK.Push power and relay clicks on. HOT OK with +130VDC on
> coll. H. drive transistor has no collector vltg( Q701).Tried to trace
> Q701 coll supply back,very hard. I think this scheme (if like other
> late Hitachis)uses a start up supply voltage to give the H. driver a
> kick start until the flyback supply comes up and sustains it. But I
> need some technical feedback as I have no diagram. I ESR'd caps all
> over. This unit has a small unpluggable horizontal processor module
> called "A3LXU side pin pwb" size of a credit card. TIA, Phil
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