SL-F60
1984
Betamax SL-F60



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Technical

slf60 rear view
SL-F60 rear view

Power supply problems

This VCR uses a STR1229A (IC001) at the heart of its power supply. If you experience PSU problems then this is the first thing to check. Be sure to check outputs 'onload' as the regulator can otherwise appear OK.

Deck goes into rewind

This can be caused by failure of the tape end sensor. You can check this by unplugging the sensor at its socket on the PCB.
Pendulum
Pendulum

Stops in play or record

This is becoming a more common problem these days. The first thing to check is that there is adequate torque on the take up spool. If there isn't much then the cause is usually down to two contributing factors.

The first is the drive pendulum which can cease up and the second more serious factor, is wear on the reel motor bottom bearing. The pendulum is simple to replace but the bearing is moulded into the chassis and replacement necessitates that the entire chassis be replaced. One possible compromise is to fit a small piece of plastic into the bottom bearing to raise the rotor and allow it to move freely. Sony supply a repair kit for this purpose.

hall effect sensors with glue
Hall effect sensor attached with glue

No head rotation

You may find that the head drum fails to rotate. This is due to a problem with the Hall effect device on the head drum motor which is secured by a blob of glue. Full details on how to fix this can be found on the head motor page.

Broken gear (left)


Gear assembly

Failure to load a tape

The cassette carriage can fail to operate. This is caused by breakage of the plastic gears in the side of the mechanism. Often one of the teeth is missing.

When this happens the faulty gears must be replaced and the mechanism correctly realigned so that the left and right side "tray arms" are at the same position relative to the front panel. This is done by releasing the plastic tab on the gear away from the motor side and selecting the correct mesh position with the teeth of the drive cog on rod which connects between both sides of the cassette tray.

This problem is also found on the SL-F30, SL-HF150 and the SL-HF77.

Loading gear and shaft repair

The loading shaft for the Sony has no replacement but most times it can be repaired, unless the gear is in two pieces or a tooth has broken off.

Here is how to repair the shaft when it is out of the machine:

  1. Remove the black plastic gear from the shaft and then clean the shaft of all plastic residue.
  2. Take the gear and pass a hobby knife (or similar narrow blade) down through the gear crack to remove any plastic residue to allow it to close to its correct gap width.
  3. Place the gear in a soft jaw vice such that you can apply pressure to close up the gear crack.
  4. Now use a drill with the same diameter as the outside diameter of metal drive shafts knurled shaft end to clean out the rough plastic residue from the shaft hole.
  5. Take the gear out of the vice. Take the shaft and put super-glue on it and press the shaft back into the gear.
  6. Put the assembly back into the vice again (with the shaft facing down flat, gear top facing up) closing up the gap again but leaving about 3mm of the gear exposed above the top of the vice. (note the gap is facing across the vice gap).
  7. Drill a hole the diameter of paper-clip metal through the top of the gear and shaft but just below the surface of the top disc.
  8. Insert the wire from an unfolded paper clip and turn both ends hard up, then trim off the excess metal. This will lock the plastic gear to the shaft and should keep tension across the gear and not encourage the gap to open up again.
  9. Remove any excess super glue from the cracked tooth gap.
The repaired gear may make a slight noise in operation but that is only an issue when loading and unloading. It puts the machine back into normal operation versus a scrap heap or spares. The pin clears the drive gear by a good margin and prevents the plastic spinning on the shaft again. (by Noel Higgins)

This machine is nearly identical to the SL-F30 and many of the tips listed will be relevant.

Quick fault guide

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FaultSolution
No tuner, No video O/P, No TV O/P, tape loads but capstan runs full speedReplace electronic fuse N20 labelled PS001 on board YC31
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