[TechAssist] Re: Zenith PTV- PV5263MK (C8 Chassis) Sweep Module 9-1302-04. No HV.
- From: "Ron Miller" <rlmbkm@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 5 Dec 2002 16:53:02 -0600
Take an ohms reading from the flyback anode to HV ground (cold ground) or
the horiz output C.
Very common problem, the diode stack inside flyback shorts.Sencore ringer
will not pick this defect up.HTH P.S. Replace Flyback.
Country TV
Ron Miller
484 FM444 S.
Inez,TX 77968-5002
V.(361)782-6419. F.(361)782-9149
e-mail: rlmbkm@xxxxxxxx
----- Original Message -----
From: <HarrisTV50010@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 05, 2002 4:38 PM
Subject: [TechAssist] Zenith PTV- PV5263MK (C8 Chassis) Sweep Module
9-1302-04. No HV.
> We have a Zenith Projection set in our shop. Model# PV5263MK with a C8
> Chassis. This unit has a 9-1302-04 sweep module. We replaced the shorted
> QX3200(121-1167-01) horiz..output transistor. The Power supply comes up OK
> with the H.O. Transistor collector disconnected but with the collector
> connected you only get about 9V B+. We have disconnected the HV splitter
from
> the IHVT with the same results. We don't have the proper schematic. We did
> pull the IHVT out and it checked OK on our Sencore. Has any body had any
> common problems with this unit causing problems in the horizontal output
> stage?
>
> TIA,
> Dale
>
> Dale A. Lubow... HarrisTV50010@xxxxxxx ..515-232-1109..(Fax)515-232-3356
> Harris TV & Appliance..........335 Lincoln
> Way.....Ames.....Iowa.....50010-3384
>
>
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