Table Of Contents - Pioneer KEX-70 Service Manual

EX-70/73
CONTENTS
1. PARTS LOCATION......... 0.00. cece eee eee ee 1 CAUTION
2. CIRCUIT DESCRIPTION..............2.-0--06- 1 When Handling IC PD7004 and PD2001
3. ADJUSTMENT Please Observe:
3.1 Crystal OSC Frequency Adjustment .......... 17 IC PD7004 and PD2001 (IC6 and IC5 in the tuner control
3.2 FMIF Adjustment .................--00-55 18 unit- KEX-70, 1C5 and IC4 in the tuner control unit- KEX-73)
3.3. FM Tracking Adjustment................--. 19 are C-MOS ICs of extremely low power consumption and very
3.4 FM MPX Adjustment ...............-----5 20 high input impedance. Unless handled with special care, they
3.5 FM ARC Adjustment ...............-2008- 20 could be damaged by static electricity induction. these ICs are
3.6 FM Scan (Seek) Sensitivity Check ........... 21 supplied with a shorting cap (of aluminium foil) attached.
3.7 AM IF Adjustment (KEX-70)..............5- 21 When soldering or performing other repair work, always
3.8 AM Tracking Adjustment (KEX-70)........... 22 attach this cap as shown below. Remove the cap after the
3.9 MW/LW IF Adjustment (KEX-73)............ 23 repair has been completed.
3.10 MW/LW Tracking Adjustment.............. 24 Also, this type IC must not be inserted in a polystyrene pack-
3.11 AM (MW) Scan (Seek) Sensitivity Adjustment . . 25 age for storage.
3.12 LW Scan (Seek) Sensitivity Check ........... 25
3.13 Dolby NR Law Adjustment ..............00- 25
3.14 Dolby NR Level Adjustment................. 25
4. CONNECTION DIAGRAM (KEX-70)...........5-. 29
5. SCHEMATIC CIRCUIT DIAGRAM (KEX-70) .......- 33
6. CONNECTION DIAGRAM (KEX-73)...........5-- 37
7. SCHEMATIC CIRCUIT DIAGRAM (KEX-73) ....... 41
8. CABINET EXPLODED VIEW.............--.-05- 45
9. CHASSIS EXPLODED VIEW ...............0055 46
10. PACKING METHOD .......... 0.0.0 e eee eee .. 49
11. ELECTRICAL PARTS LIST. ...........0..00000- 50
¢ Cassette Mechanism Unit
See the Service Manual CX-118FV (CRT-199) when servicing
the cassette mechanism unit.
The differences from the CX-118FV are shown below.
Exploded View (Top) Page 26
CX-118FV KEX-70, KEX-73
Key No. Description Part No. Description
24 Head CPB-063 Head
Exploded View (Bottom) Page 26
CX-118FV KEX-70, KEX-73
Description Part No. Description
Motor CXM-072 Motor