[TechAssist] Re: NAD Stereo Model 7000-Won't turn on most of the time.
- From: "G.Larkman" <mail@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 7 Oct 2004 13:25:44 -0700
Dale,
Check the filter cap feeding the voltage rail that energises the power relay
coil through a resistor.
It most likely is low in capcitance and has allowed the dc level of the rail
to drop below the threshold of being able to actuate the relay.
Glenn Larkman
Audiotech
256 Nth Hwy 101
ENCINITAS CA 92024
760 944 9048
FAX 944 0345
mail to"mail@xxxxxxxxxxxxx"
"www.audiotech.net"
----- Original Message -----
From: <HarrisTV50010@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, October 07, 2004 1:12 PM
Subject: [TechAssist] NAD Stereo Model 7000-Won't turn on most of the time.
I have a NAD Model 7000 Stereo in for service. If this unit turns on it will
stay working OK. Most of the time you press the momentary power switch and
nothing happens. There is digital 5V p-p pulses on one side of the switch
and
when you push the button the pulses are transferred across the switch OK, so
the
switch is OK. I do not have a schematic to see if the micro is seeing the
pulse properly. Has any one had any experience on one of these?
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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