Hi folks,

got my hands on a Grundig VS-960 VCR (allegedly a big deal in its day).
Well, plugging it in does nothing. Absolutely *nothing*. Not even a
clock display. Punching what I assume to be the power button (3rd from
top next to the display) does nothing either. There appear to be some
voltages in the secondary PSU, but w/o service manual or any hints I'm
pretty lost in there. Anyone here know something about this model?

Thanks in advance!

--GanjaTron

GanjaTron wrote:
Hi folks,

got my hands on a Grundig VS-960 VCR (allegedly a big deal in its
day).
Well, plugging it in does nothing. Absolutely *nothing*. Not even a
clock display. Punching what I assume to be the power button (3rd
from
top next to the display) does nothing either. There appear to be some
voltages in the secondary PSU, but w/o service manual or any hints
I'm
pretty lost in there. Anyone here know something about this model?

Thanks in advance!

--GanjaTron

start by changing all the electrolytics in the power supply.

b wrote:

start by changing all the electrolytics in the power supply.

Will do, I guess that's always a good starting point w/o schematics.
Any way of checking them one by one instead of replacing ALL? Which
ones should I check/replace first (primary/secondary, high/low
capacitance)?

Btw, I came across this posting in dutch:

http://groups-beta.google.com/group/...b743e6e03e58ca

It mentions the TDA8137 regulator, which I checked. It's got the 5V
outputs w/o load, but when I attach the connectors on the secondary, it
drops to 0.1V! In that posting, the guy replaced a 1mF cap in the
primary, so maybe it is a cap problem.

--GanjaTron

GanjaTron wrote:
b wrote:

start by changing all the electrolytics in the power supply.

Will do, I guess that's always a good starting point w/o schematics.
Any way of checking them one by one instead of replacing ALL? Which
ones should I check/replace first (primary/secondary, high/low
capacitance)?

Btw, I came across this posting in dutch:


http://groups-beta.google.com/group/...e_thread/thre=
ad/8b743e6e03e58ca

It mentions the TDA8137 regulator, which I checked. It's got the 5V
outputs w/o load, but when I attach the connectors on the secondary,
it
drops to 0.1V! In that posting, the guy replaced a 1mF cap in the
primary, so maybe it is a cap problem.
--GanjaTron

unless you have an esr meter, just replace the caps to be on the safe
side. be sure to use 105=BA rated substitutes.
good luck, Ben

Fixed! Replaced the 47uF/25V/85deg cap in the primary with a
100uF/25V/105deg. Works like a charm, only there's something squeaking
in the drive when lacing the tape... :^)

--GanjaTron

In article .com,
GanjaTron wrote:
Fixed! Replaced the 47uF/25V/85deg cap in the primary with a
100uF/25V/105deg. Works like a charm, only there's something squeaking
in the drive when lacing the tape... :^)

You did check for mice, didn't you?
--
--------------------------------------+------------------------------------
Mike Brown: mjb[at]pootle.demon.co.uk | http://www.pootle.demon.co.uk/

Mike wrote:

You did check for mice, didn't you?

Naaah, squeaky brake pad on the capstan motor. Bugger if I know what
the hell it's for. Guess I'll just chuck it out, seems useless anyway.
Made a separate post about that.