TechnicalBecause of its age spares are not easy to obtain for the SL-8000.
Modification for 60Hz, 120V mains operationPlease note that for 60Hz, 200-240V operation, carry out steps 3 to 5 only.
- Set the voltage selector to 127V.
- Remove and tie back the yellow and white wires from the power transformer T9501 which are soldered to the FS-1 board. Connect 2 leads to the terminals left free on the FS-1 board. The lead soldered to F9002 should be connected to Pin 4 of the voltage selector and the other lead should be connected to Pin 3.
- Reduce the value of the motor capacitor C8102 from 3.7 microF to 2.5 microF by removing the jumper lead from the PE-1 board.
- Remove D3101 from the PT-1 board.
- The following pulleys should be changed:
Former New Motor pulley assembly X-3656-025-l/5 X-3656-350-l/7   Select for correct drum free speed Drum pulley 3-656-034-00 3-656-421-00 Capstan pulley 3-646-192-01/51 3-646-194-01/5l   Select for correct tape speed
Fault and repair guide
Tape transport is sluggish or fails to rewindInternally the SL-8000 contains many drive belts which are used in the mechanics of tape transport. With age these belts become slack causing malfunctions and when this happens the whole lot should be replaced. In particular for the rewind function you will need to replace a tyre on the supply reel.
Strange behaviour of capstan/drum servoThe first thing to check is the tantalum capacitors in the servo circuit.
Sluggish threading and capstan problemsThe bottom bearing on the capstan motor is prone to wear and because this motor also drives the threading mechanism threading can become sluggish. When this happens you will hear a horrible squeaking noise!
Quick fault guidePlease click on the button if you are able to contribute a solution to this list or would like to add to, or update PALsite's information on this model. Please note, questions will be removed.
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|Colour streaking on playback of pre-recorded tapes||Check for poor contacts or contamination of the presets in the chroma circuit. If necessary clean and re-align.|
|Crackling or noise on sound||Suspect failure of the record/playback switch S601.|
|Intermittently stopping when warm||Check the plug and socket connectors to the end sensor coil. Then check presets RV701 and RV702.|
|Interference on picture||Suspect failure of the record/playback switch S101.|
|No Power||Main on/off switch|
|Tape jammed or lock up||Stop solenoid switch|
|Ejects Tape||Dry Joint on tape slack sensor|
|No AC motor drive||bad connections on 3 pin connector or AC motor open circuit|
|Picture slips in pause||Belts and/or brakes|
|Shuts down on Play||Static build-up on metal threading guide, earth guide|
|No Go||Board SY-1: Q701 & 702 2SC-1364, auto stop|
|No play or spool||Board SY-1: IC 701 CX-141|
|No Pause||SY-1: IC 702, 703 TC-4001|
|Tape Lock Up or Spool malfunctions||SY-1: RV701, 702 22k pots sensor osc.|
|Tape lock -up||SY-1 C701 .0033uf|
|Rewind only||SY-1 CN 6161--wire direct|
|No ctl pulse on Pause||IC 501 CX-138|
|No tracking||IC 502 CX-139|
|No rev||SY-11 change R1, C1 to 180k, .001uf, dirty contact cn4007|
|no audio rec||AS-1 Q605, 606|
|No buttons will lock||belts off|
|Rewind button will not stay down||check board connections on supply sensor board|
|Intermittent colour on play||Check AFC adjustment on Y/CE board RV14 bottom pcb|
|White streaks, b&w and possible vertical jitter||One head clogged, dirty contacts on S101 or faulty pre-amp|
|Throws loop off tape when going from rewind to stop||Replace or adjust supply/take-up of brake assembly|
|Auto stop when rew pressed||Check TP702 fro 3V p-to-p|