[TechAssist] Re: JVC AV-27120
- From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 2 Feb 2002 00:22:16 -0500
Hi Shaun,
If you've replaced the tuner 2 times and it still does not get any channels
you may want to make sure your data and clock lines on your tuner have a 5
volt p-p signal going to it. Normally the 33 Volt TU pin will read 33 volts
all the time as that pin is the supply for the tuner. Check and verify that
you have +5 volts and 12 volts also. If you find the clock and / or data
line low
(< 4.3 volts) then you may have to check for a leaky zener or open resistor.
BTW are you replacing with an original JVC tuner or a rebuilt one??
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Shaun" <ssroark@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, January 31, 2002 8:58 PM
Subject: [TechAssist] JVC AV-27120
> Hi Tech's, I have asked about this tv before. It has no reception only
snow on all channels. When I check the tuning voltages the TU pin never
changes always stays at 33 volts. From what I can tell the tuning voltage
comes from inside the tuner being controled by the micro through the data
lines. I have replaced the tuner 2 times thinking the first replacement was
defective. I do not have the exact schmedic for this one so if anyone has
seen this before any help would be a great help.
>
> Shaun
> Advanced Electronics
> Fort Morgan, Co 80701
>
> ------------------------------------------
> Make your TechAssist database better!
> Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
> ------------------------------------------
> To UNSUBSCRIBE your email address, click here:
> mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
> Or send a BLANK email with unsubscribe in the
> SUBJECT field to the address above.
>
>
------------------------------------------
Make your TechAssist database better!
Submit Repair Tips here: http://www.tech-assist.org/secure/tip/
------------------------------------------
To UNSUBSCRIBE your email address, click here:
mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
Or send a BLANK email with unsubscribe in the
SUBJECT field to the address above.
Other related posts:
