[TechAssist] Re: Technics - Integrated Amplifier - SU-V98 - PowersUp - No Output - FIXED
- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 14 Nov 2005 15:50:34 -0500
FIXED!
Well...It was the SVI-3205 amp module. William you were right sir! First
time I've seen a no output condition without the actual outputs being
shorted on these modules. The module (a SVI-3206) I ordered came in earlier
then expected, installed it and all was good. You learn something new almost
everday. Thanks to all who replied. As this unit is now mine (customer
thought price of module and repair too expensive) I would like to have a
service manual in my possesion, if anyone has one to send please do.
David Lessard
mr_fixit@xxxxxxxxxxxx
Alexandria, Ontario, Canada
----- Original Message -----
From: David Lessard <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, November 14, 2005 1:35 PM
Subject: [TechAssist] Re: Technics - Integrated Amplifier - SU-V98 -
PowersUp - No Output
> FOLLOWUP:
>
> My eyes and brain are too tired to trace anything today, I haven't been
> feeling great the last couple of days, could someone please provide me
with
> a service manual for this unit. Thank-you. David Lessard,
> mr_fixit@xxxxxxxxxxxx, Alexandria, Ontario, Canada.
>
> ----- Original Message -----
> From: David Lessard <mr_fixit@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, November 10, 2005 6:33 PM
> Subject: [TechAssist] Re: Technics - Integrated Amplifier - SU-V98 -
> PowersUp - No Output
>
>
> > Thanks for the tip William, I will look into the possibility that the
> preamp
> > circuit is not working and also confirm DC supply voltages before
posting
> a
> > followup. In the meantime my request for a service manual is still out
> > there.
> >
> > David Lessard
> > mr_fixit@xxxxxxxxxxxx
> > Alexandria, Ontario, Canada
> >
> > ----- Original Message -----
> > From: William E Miller <prototech@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, November 10, 2005 6:11 PM
> > Subject: [TechAssist] Re: Technics - Integrated Amplifier - SU-V98 -
> > PowersUp - No Output
> >
> >
> > > Gary's tip is probably dead on. It's probably the IC, and of course
lots
> =
> > > of
> > > soldering, including the input RCA jacks / grounds.
> > >
> > > The output IC can indeed be shorted without blowing the fuse. The
short
> > > doesn't have to be across the supply line(s), after all.
> > >
> > > You can check for DC supply levels on the output lines of the IC.
Follow
> =
> > > the
> > > leads that go to the output relay or the big air-core coils /
inductors.
> > >
> > > Sometimes an output IC will have a fusible resistor feeding the supply
> to=
> > > the
> > > preamp. If present, that resistor may be out even if the main supplies
> ar=
> > > e
> > > okay.
> > >
> > > > David, found this:
> > > > =
> > >
> > > > TECHNICS SUV98KM1 no power or output replace shorted ic501 =
> > >
> > > > svi3206d power amp, r701 47/1/2w, resolder jack packs
> > > > Gary McCartney
> > >
> > > > > Hello All,
> > > > > This unit turns "on", display is present and I can select
different
> i=
> > > nputs
> > > yet there is no output. Main output IC is one of those SVI-3205
> (replaced=
> > > by
> > > SVI-3206), I've worked on a couple of these in the past, one where the
> ou=
> > > tputs
> > > were blown (this caused main fuse to blow), the other unit required
> exten=
> > > sive
> > > resoldering. In this case I don't hear the speaker relay engaging,
this
> s=
> > > hould
> > > occur a few seconds after power "on". I've resoldered all questionable
> ri=
> > > ng
> > > cracks in and around power resistors, diodes, etc. and still the relay
> do=
> > > esn't
> > > engage. I could use a service manual to further debug this problem,
> unles=
> > > s of
> > > course one of you have experienced this same problem, please do tell.
> > >
> > >
> > >
> > > William E. Miller, ASEET
> > > prototech@xxxxxxx
> > > Indiana USA
> > >
> > >
> >
>
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