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Technical
Rear view
Idler
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Fault and repair guide
No reel rotation
This is a very common problem which can have several causes. The first
thing which fails is usually the reel idler assembly. Replacement units
are readily available and can be fitted easily after removal of the
cassette carriage. Before replacement check for a
broken reel motor
belt. This is a small belt which transfers drive to the idler.
Finally, the last thing to suspect is the reel motor.
Sanyo produced a modification to improve drive to this motor. This
involved decreasing the value of the in-series resistor in the
motor power supply. However, it is not uncommon for the motor itself
to fail in which case it needs to be replaced.
The diagram above shows the idler assembly.
No tuner input
This is usually caused by failure of the RF combiner / splitter unit.
Unfortunately it is not easy to repair this unit.
Timer and/or standby LED fail to illuminate
This is caused by dry joints where the LED are soldered onto the
front PCB. In order to gain access to the PCB you'll need to remove
the front panel and the servo board on the LHS of the deck.
12 Hour Clock Display Mod
On the clock PCB
there is a position for 12H or 24H clock. Usually they are 24H, but fit
a 1N4148 diode in this position (note polarity as per PCB marking) and
you get 12H clock with AM/PM illuminated in the display.
Loss of servo lock in record
Recordings can suffer from a loss of drum lock which produces a
picture roll and usually occurs between sudden bright/dark transitions.
It is caused by problems with the sync separator in the servo circuits,
usually due to dried out electrolytic capacitors.
System Control Bug
The machine had a strange bug in the system control software. Whenever an error
occured with the tape transport the
VCR would lace up and shutdown. This is exactly the opposite of what you would
expect and made sure that it was not possible to remove the cassette without
damaging the tape. This 'feature' was not present in the later
VTC-5150 model.
Further Information
For further information on general servicing on this model, take a look at
Colin McCormick's excellent guide on
How to service a Sanyo Beta.
Colin is also able to supply a service kit for this model.
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Quick fault guide
Please click on the link if you are able to contribute a solution to this list.
Add a new quick fault guide entry.
| Fault | Solution |
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No function or power LED's working. 9 Volt supply dead on SY2. | Print broken next to pin 19 (S3004) on servo board SY1. Jumper wire fitted to bridge gap. |
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