- TEST MODE
- MECHANICAL ADJUSTMENTS
- ELECTRICAL ADJUSTMENTS
- Circuit Boards Location
- Block Diagram
- Schematic Diagram — Main Section (1/2)
- Schematic Diagram — Main Section (2/2)
- Printed Wiring Board — Main Section
- Printed Wiring Board — Display Section
- Schematic Diagram — Display Section
- Printed Wiring Board — SW Section
- Schematic Diagram — SW Section
- Printed Wiring Board — Power Amp Section
- Schematic Diagram—Power Amp Section
- Printed Wiring Board — Deck Section
- Schematic Diagram — Deck Section
- Printed Wiring Board — Power Transformer Section
- Schematic Diagram — Power Transformer Section
- IC Block Diagrams
- IC Pin Function
- EXPLODED VIEWS
- ELECTRICAL PARTS LIST
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SECTION 3 MECHANICAL ADJUSTMENTS
PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened swab: record/playback head pinch roller erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, apply suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. â¢ Torque Measurement Mode Forward Forward Back Tension Reverse Reverse Back Tension FF, REW CQ-102RC CQ-201B Torque Meter CQ-102C CQ-102C CQ-102RC Meter Reading 36 to 61gâ¢cm (0.50 to 0.84 ozâ¢inch) 2 to 6gâ¢cm (0.026 to 0.082 ozâ¢inch) 36 to 61gâ¢cm (0.50 to 0.84 ozâ¢inch) 2 to 6gâ¢cm (0.026 to 0.082 ozâ¢inch) 61 to 143gâ¢cm (0.85 to 1.98 ozâ¢inch)
SECTION 4 ELECTRICAL ADJUSTMENTS
DECK SECTION 1. 0 dB=0.775V
2. 3. 4. 5.
6. 7. 8.
Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) Do not use a magnetized screwdriver for the adjustments. After the adjustments, apply suitable locking compound to the parts adjust. The adjustments should be performed with the rated power supply voltage unless otherwise noted. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.) The adjustments should be performed for both L-CH and Rch. Switches and controls should be set as follows unless otherwise specified. Set to test mode. (While pressing the DUBBING SPEED HIGH button, insert the AC outlet.) Test Tape Tape P-4-A100 WS-48B P-4-L300 Signal 10 kHz, â10 dB 3 kHz, 0dB 315 Hz, 0dB Used for Azimuth Adjustment Tape Speed Adjustment Level Adjustment
â¢ Tape Tension Measurement Mode Forward Reverse Tension Meter CQ-403A CQ-403R Meter Reading more than 100 g (3.53 ozâ¢inch) more than 100 g (3.53 ozâ¢inch)
Record/Playback Head Azimuth Adjustment DECK A DECK B
Note : Perform this adjustments for both decks. Remove the covers of cassette holders. Procedure: 1. Mode: Playback (FWD)
test tape P-4-A100 (10 kHz, â10 dB)
rear panel set
level meter + â
VIDEO1 AUDIO OUT connector (L: L-CH) (R: R-CH)
Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
L-CH peak output level
within 1dB within 1dB
R-CH peak L-CH peak R-CH peak