Pioneer ctf 750 service manual

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MODEL CT

Type Voltage Remarks
KU AC 120V only U.S.A. modal

KC AC 120V only Canada model

HE AC 220V and 240V lSwitcnablel Europe model

HE 3 AC 220V and 240V1Switcnablel United Kingdom model

D 1 AC 120V, 220V and 240VlSw1tchablel General export model

D/G AC 120V,'220V and 240V lSwitchable) U.S. Military model

O This service manual is applicable to the CT-F750/KU, KC for servicing of the other types,

please refer to the additional service manuals.

CONTENTS

1. SPECIFICATIONS ..................... 3
2. FRONT PANEL FAClLITIES .............. 4
3. DISASSEMBLY ....................... 6
4. PARTS LOCATION .................... 9
5. BLOCK DIAGRAM ..................... 11
6. LEVEL DIAGRAM ..................... 13
7. CIRCUIT DESCRIPTIONS
7.1 Recording and Playback Circuitry ....... 14
7.2 Dolby NR Processor ................ 15
7.3 Muting Circuit .................... 16
7.4 Multivibrator Circuit ................ 18
7,5 Mode Selector Circuit ............... 18
7.6 FWD Priority Circuit ................ 19
7.7 Auto-stop (Direction Change)
Solenoid Activation Circuit ............ 20
7,8 Auto-stop Detection Circuit ........... 20

7.9 Tape Slack Prevention Circuit
Operating During Mode Switching

from FF or REW to PLAY ............ 21
7.10 Auto-Start Circuit .................. 21
7.11 Manual Direction Switching Circuit ...... 22
7.12 Level Meters Circuit ................. 22

8. MECHANICAL ADJUSTMENTS

8.1 Adjustment of Tape Speed ............ 27
8.2 Adjustment of Safety Switch

(Motor Switch) .................... 27
8.3 Adjustment of Muting Switch .......... 27
8.4 Adjustment of Play Timing ............ 28
8-5 Adjustment of Pause Timing ........... 28

9. ELECTRICAL ADJUSTMENTS

9.1 Tape Transport and Head Angle
Adjustment ......................

9.2 Playback Equalizer Adjustment .........
9V3 Playback Level Adjustment ............
9.4 Line Output Level Adjustment ..........
9.5 Level Meter OdB Adjustment ...........
9.6 Recording Current Rough Adjustment . . . .
9.7 Erasure Bias Current Adjustment ........
9.8 Bias Trap Adjustment ...............
9.9 Recording Bias Rough Adjustment .......

9.10 Recording and Playback Frequency
Response Adjustment ...............

9.11 Dolby Adjustment and Check ..........
9.12 Recording Level Adjustment ...........

10. EXPLODED VIEWS
10.1 Exterior ........................

10.2 Mechanism Assembly ..........

11. SCHEMATIC DIAG RAMS PC. BOARD
PATTERNS AND PARTS LIST

11.1 Miscellaneous Parts List ..............

11.2 Connection Diagram ................
11.3 Schematic Diagram .................
11.4 Main Unit (RWXv330) ...............
11.5 Connector Unit ....................
11.6 Switch Unit (RWS»077) ..............
11.7 FR Switch Unit L ..................
11.8 FR Switch Unit R ..................
11.9 FL Unit (RWX-331I ................
11.10 LED Unit .......................
11.11 Power Supply Unit (RWR-O75) .........
12. PACKING ...........................

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