Samsung VCR with sound/video problem?

[conundrum]

I have a slightly broken Samsung SV-651B VCR, which plays and records
(albeit in monochrome) but the sound does not work on any mode.

On playback, the picture seems to be mistracking in a cycle, yet it
responds to tracking adjustment.

There seems to be an overheating problem in the LA71750 A/V control IC
but the cheapest one can be purchased for is £22 (!!!!)

Most of the remote functions work but the front panel buttons on the
RHS do not work at all, when Play is pressed "7ES7" comes up in the
display.

has anyone seen this fault before?

thanks, -A

 

[b]

I have a slightly broken Samsung SV-651B VCR, which plays and records
(albeit in monochrome) but the sound does not work on any mode.

On playback, the picture seems to be mistracking in a cycle, yet it
responds to tracking adjustment.

There seems to be an overheating problem in the LA71750 A/V control IC
but the cheapest one can be purchased for is £22 (!!!!)

Most of the remote functions work but the front panel buttons on the
RHS do not work at all, when Play is pressed "7ES7" comes up in the
display.

has anyone seen this fault before?

thanks, -A

'slightly' broken? blimey, you mention about 5 different faults there
- audio, b/w, mistracking, sys control....! have you changed the power
supply caps, as this multitude of symptoms may be due to power rails
being screwed up.

unless the vcr is a real high end model it will not be feasible to
fix. As people 'upgrade' (sic!) to dvd-r , decent VHS decks can be
had for a pittance or free on freecycle. may be easier to go that
route-
-b