Sankyo STD-1700 - Troubleshooting; Mechanical Parts Troubleshooting

- 8. TROUBLESHOOTING
8.1. Mechanical parts
16
Motor does not turn. 1. Switch defective. Replace.
2. Motor defective. Replace.
Tape does not run 1. Tension belt, motor pulley or pinch roller Clean.
slipping due to oil or dirt.
2. Tension belt disengaged. Engage.
3. Motor pulley screws loose. Tighten.
4. Pinch roller pressure insufficient. Adjust.
Tape winds onto 1. Defective pinch roller Clean or replace.
capstan shaft. 2. Defective take-up reel table a’ssy Replace.
3. Tape path wrong (improper tape guide Adjust.
position and bad head mounting).
Capstan does not rotate. 1. Capstan belt off Engage.
2. Defective motor Replace.
Index counter will not 1. Counter reset button not fully depressed. Replace.
count. 2. Counter belt off. Engage.
Shut-off T Shut-off does 1. Link allowance insufficient. Adjust stopper
failure not work or plate arm.
works Rearrange wires.
intermittently. Adjust leaf switch
clearance.
2. Coil spring badly positioned against detect cam. Adjust spring
position.
Shut-off works | 1. Top spring of detect cam making contact with Adjust clearance.
during FF or brake plate.
REW. 2. Detect cam not following the reel disc rotation. Clean and oil
detect cam.
3. Coil spring badly positioned against detect cam. Increase compres-
sion spring force.
Shut-off works | Detect cam spring incorrectly shaped. Adjust and reshape.
at PAUSE
Wow and flutter excessive. 1. Tape speed unstable due to oil or dirt on ap Clean.
pinch roller or capstan.
2. Oil or dirt on tension belt. Clean.
3. Pinch roller pressure insufficient. Adjust.
4. Motor defective. Replace.
5. Bad tape. Use good tapes.
6. Forward torque improper. Adjust.
7. Flat belt defective. Replace
Rewind
and/or
fast
forward
1.
Reel
disc
tire,
idler
and/or
flywheel
slipping
Clean.
impossible. due to oil or dirt.
2. Friction of idler lever assembly insufficient. Adjust.
3. Motor defective. Replace.