Pioneer sx 980 service manual

Page 2

SX-QBD

MODEL SX-980 COMES IN FIVE VERSIONS DISTINGUISHED AS FOLLOWS:

l7 Type Voltage l Remarks
i KU 120V only U.S.A. model
L
KC 3 120V only . Canada model
1 v
I HG 220V and 240V (Swnchablel Europe or Oceania model I
i . ,, 4
l l
S 110V, 120V, 220V and 240V (Swnchablel General export model 2
T
3/6 110V,120V,22UV and 240V (Switchable) 0.5. Military model ;
NOTICE:

0 This service manual is applicable to the SX-QSO/ KU.
O The SX-980/HG, S,S/G service manual is issued as an appendix.

CONTENTS

1. SPECIFICATIONS ..................................................... 3
2. FRONT PANEL FACILITIES ............................................ 5
3. CONNECTION DIAGRAM ............................................... 8
4. LEVEL DIAGRAM ..................................................... 10
5. BLOCK DIAGRAM .................................................... 11
6. CIRCUIT DESCRIPTIONS
6.1 AM'FM Tuner .................................................... 13
6.2 Phono, Mic Input Circuit ............................................ 14
6.3 Flat Amplifier ..................................................... 14
6.4 Tone Control ..................................................... 14
6.5 Power Amplifier ................................................... 14
6.6 Meter Amplifier ................................................... 15
6.7 Protection Circuit .................................................. 15
6.8 Power Supply ..................................................... 16
7. DISASSEMBLY ....................................................... l7
8. PARTS LOCATIONS
8.1 Front Panel View .................................................. 18
8.2 Top View ........................................................ 19

8.3 Front View with Panel Removed ...................................... 20