Pioneer ctf 950 service manual

Page 2

MODEL CT-F950 COMES IN SIX VERSIONS DISTINGUISHED AS FOLLOWS:

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

KC AC 120V only Canada model

HE AC 220V and 240V (Switchable) Europe model

HB AC 220V and 240V (Switchable) United Kingdom model

D AC 120V, 220V and 240V (Switchable) General export model

DIG AC 120V, 220V and 240V (Switchable) U.S. Military model

o This service manual is applicable to the CT-F950/KU.

refer to the additional service manuals.

CONTENTS

NPF'PSAN.

SPECIFICATION ..................... 3
FRONT PANEL FACILITIES ............. 4
LEVEL DIAGRAM .................... 6
DISASSEMBLY ...................... 8
PARTS LOCATION ................... 11
BLOCK DIAGRAM ................... 13
CIRCUIT DESCRIPTIONS
7.1 Recording and playback circuit ....... 15
7.2 Tape selector circuit .............. 15
7.3 Level meter .................... 16
7.4 Electronic counter ............... 16
7.5 Dolby NR processor circuit ......... 17
7.6 Control circuit .................. 18
7,7 Muting circuit .................. 27
MECHANICAL ADJUSTMENTS
8.1 Pinch roller pressure adjustment ...... 30
8.2 Tape speed adjustment ............ 30
8.3 Tape guide adjustment ............. 30
ELECTRICAL ADJUSTMENTS
9.1 Head azimuth adjustment ........... 31
9.2 Playback equalizer adjustment ....... 32
9.3 Playback level adjustment .......... 32
9.4 Level meter OdB adjustment ......... 32
9.5 Approximate adjustment of

recording current ................ 33
9.6 Erasure current adjustment .......... 33
9.7 Bias trap adjustment .............. 33
9.8 Approximate adjustment of

recording bias .................. 34

10.
11.

12.

13.

For servicing of the other types, please

9.9 Recording equalizer and variable

equalizer adjustments ............. 34
9.10 Recording and playback frequency

response adjustment .............. 34
9.11 Recording level adjustment .......... 35
9.12 Output level adjustment ............ 36
9.13 Recording dolby NR adjustment ...... 36
9.14 Playback dolby NR adjustment ....... 36
PACKING .......................... 41
EXPLODED VIEWS
11.1 Exterior ...................... 42
11.2 Mechanism assembly .............. 45
11.3 Panel stay ..................... 48

SCHEMATIC DIAGRAMS P.C. BOARD

PATTERNS AND PARTS LIST

12.1 Miscellaneous parts list ............ 50
12.2 Connection diagram .............. 51
12.3 Schematic diagram ............... 54
12.4 Function switch assembly .......... 57
12.5 Mother assembly (RWX-359) ......... 58
12.6 Volume assembly ................ 63
12.7 Sensing assembly ................ 63
12.8 Indicator assembly ............... 64
12.9 Indicator amplifier assembly (RWXv328) . 67
12.10 Integrated amplifier assembly (RWX-360). 71
12.11 Power supply assemblijWR-067) . . . . . 73
12.12 Control assembly(RWG-103) ......... 77
12.13 REC E0 assemblleWX-361) ........ 81
12.14 Tape selector assembly ............ 83
12.15 Fuse assembly .................. 84
TROUBLE SHOOTING ................. 85