[TechAssist] Re: JVC AV27790 storm,no OSD, panel control,hard to power off, FIX
- From: <hartstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 3 Sep 2003 18:37:21 -0300
I love manf. who use mininum standards for there semiconductors.They will
eventually fail,sometimes prematurally.They ''cave-we correct'',money in the
bank.......
Don of HARTS-TVCR-ASC
9 Robert St,Oromocto,NB,Canada,E2V3N2
Tel-506-357-9785,Fax-506-357-6010
hartstv@xxxxxxxxxxx
----- Original Message -----
From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 03, 2003 1:04 PM
Subject: [TechAssist] JVC AV27790 storm,no OSD, panel control,hard to power
off, FIX
> Plug it in, may power on itself. Took many tries to power off manually.
> No volume control adjustment, no OSD. The one channel it was stuck on
> was OK.
> Tried replacing eeprom with micro, same.
> Fix: IC781 5V reg.
> Found a small three leg IC regulator, IC781 (KIA78S05) 5V reg with about
> +13V in, zero out.
> Replaced it with a stock 5V reg IC.Unit operates good now.
> There are holes at IC781 that would allow insertion of a standard LM7805
> TO-220 type, but the smaller was in this set.
> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
> For Professional Technicians Only
>
>
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