Table Of Contents - Pioneer CT-F850 Service Manual

MODEL CT-F850 COMES IN SIX VERSIONS DISTINGUISHED AS FOLLOWS:
HE AC 220V and 240V (Switchable)
AC 120V, 220V and 240V (Switchable)
KU AC 120V only U.S.A. mode!
KC AC 120V only Canada mode! ;
Europe model
HB AC 220V and 240V (Switchable) United kingdom model
AC 120V, 220V and 240V (Switchable) General export model
U.S. military model
e This service manual is applicable to the CT-F850/KU, KC. For servicing of the other types,
please refer to the additional service manuals.
CONTENTS
1. SPECIFICATIONS ...............0200es 3
2. FRONT PANEL FACILITIES.............. 4
3. LEVELDIAGRAM.................-05- 6
4. DISASSEMBLY ............ 0.02 eee eee 8
5. PARTS LOCATION ...............00005 11
6. BLOCK DIAGRAM ............-200000- 13
7. CIRCUIT DESCRIPTIONS
7.1 Recording and playback circuit ........ 15
7.2 Tape selector and equalizer........... 15
7.3 Level meters circuit................ 16
7.4 Dolby NR circuit ................. 17
7.5 Control circuits ..............000- 18
7.6 Muting circuits ...........020000ee 20
8. MECHANICAL ADJUSTMENTS
8.1 Pinch roller pressure adjustment ....... 25
8.2 Tape speed adjustment ............. 25
8.3 Tape guide adjustment.............. 25
9. ELECTRICAL ADJUSTMENT
9.1 Head azimuth adjustment............ 26
9.2 Playback equalizer adjustment ........ 27
9.3 Playback level adjustment ........... 27
9.4 Level meter adjustment ............. 27
9.5 Bias trap adjustment ............... 27
96 Erasure current adjustment........... 27
97 Bias adjustment ...............0-- 28
9.8 Recording frequency response......... 28
9.9 Recording level adjustment........... 29
9.10 Recording Dolby NR level adjustment... . 30
9.11 Playback Dolby NR level adjustment .... 30
10. EXPLODED VIEWS
TOET . (EXtENOn sui eeee Sie biden cae els Sa 32
10.2 Mechanism assembly 1.............-.- 35
10.3. Sub-chassis ....... 0... 2.02 e ee aes 37
10.4 Mechanism assembly 2.............. 38
11. SCHEMATIC DIAGRAMS, P.C. BOARD
PATTERNS AND PARTS LIST
11.1. Miscellaneous parts list ............. 41
11.2 Connectiondiagram ............... 42
11.3. Schematic diagram ................ 43
11.4 P.C. boards connection diagram. ....... 46
11.5 Mother assembly(RWX-302).......... 49
11.6 Power supply and control assembly ..... 53
(RWR-076)
11.7. Indicator amp assembly ............. 55
11.8 Sensing assembly ...............4. 55
11.9 Indicator assembly ..............0.. 55
11.10 Function indicator assembly .......... 56
11.11 Switch assembly ............0...00- 56
11.12 Fuse assembly ................00. 56
12: PACKING a8 .5 3 okie Oe ed bei eiaieties 57