SERVICE MANUAL

SECTION 3ADJUSTMENTS3-1. MECHANICAL ADJUSTMENTPRECAUTION1. Clean the following parts with a denatured-alcohol-moistenedswab:record/playback head pinch rollererase headrubber beltscapstanidlers2. Demagnetize the record/playback head with a headdemagnetizer.3. Do not use a magnetized screwdriver for the adjustments.4. After the adjustments, apply suitable locking compound to theparts adjusted.5. The adjustments should be performed with the rated powersupply voltage unless otherwise noted.• Torque MeasurementMode Torque Meter Meter ReadingForwardForwardBack TensionReverseReverseBack TensionFF, REWCQ-102CCQ-102CCQ-102RCCQ-102RCCQ-201B36 to 61g•cm(0.50 – 0.84 oz•inch)2 to 6g•cm(0.028 – 0.083 oz•inch)36 to 61g•cm(0.50 – 0.84 oz•inch)2 to 6g•cm(0.028 – 0.083 oz•inch)61 to 143g•cm(0.85 – 1.99 oz•inch)3-2. ELECTRICAL ADJUSTMENTDECK SECTION1. The adjustment should be performed in the publication.(Be sure to make playback adjustment at first.)2. The adjustment and measurement should be performed for bothL-CH and R-CH.• Switch positionDOLBY NR switch : OFFFUNCTION button : OFFEFFECT switch : OFFDBFB switch : OFF3. Deck section electrical adjustments are made in test mode bypress key switch same time CD STOP DECK A STOP andDECK B STOP button.4. Input point and output level measurement point.• Tape Tension MeasurementMode Tension Meter Meter ReadingForward CQ-403A more than 100 g (3.53 oz)Reverse CQ-403R more than 100 g (3.53 oz)• Test TapeTape Signal Used forP-4-A100 10 kHz, –10 dB Head Azimuth AdjustmentP-4-L300 315 Hz, 0dB Level AdjustmentWS-48B 3 kHz, 0dB Tape Speed Adjustment0 dB=0.775VRecord/Playback Head Azimuth AdjustmentDECK A DECK BProcedure:1. Forward Playback modeReverse Playback mode— 6 —