Pioneer qx 8000 service manual

Page 2

GX-BOOO

CONTENTS
1 SPECIFICATIONS ......................................... 1
2. FRONT PANEL FACILITIES .............................. 3
3. CONNECTION DIAGRAM .................................. 5
4 CIRCUIT DESCRIPTION
4-1 BLOCK DIAGRAM ....................................... 7
42 FM AM UNIT ............................................ 9
4-3 HEAD AMPLIFIER ....................................... 10
4-4 HIGH LEVEL INPUTS AND CONTROL CIRCUITS .............. 10
4-5 CONTROL AMPLIFIER .................................... 10
4-6 FILTER ................................................ 10
4-7 POWER AMPLIFIER CIRCUIT .............................. 10
48 POWER SUPPLY CIRCUIT ................................. 10
4-9 0 UNIT ................................................. 1O
5. DISASSEMBLY
5-1 WOODEN CASE .......................................... 13
5-2 FRONT PANEL .......................................... 13
56 BOTTOM PLATE ......................................... 13
5-4 PARTS AND PCB LOCATION .............................. 14
e. ALIGNMENT PROCEDURE
6-1 FM IF ALIGNMENT ...................................... 15
6-2 AM IF ALIGNMENT ..................................... 16
63 FM TRACKING ALIGNMENT .............................. 17
64 CHECKING OF MUTING FUNCTION ........................ 17
6-5 AM TRACKING ALIGNMENT ............................ 18
6-6 MPX DECODER ALIGNMENT ............................. 18
67 CHECKING THE SCA FILTER .............................. 19
68 CHECKING THE STEREO INDICATOR ....................... 19
7. DIAL CORD STRINGING .................................. 20
8. SCHEMATIC DIAGRAMS AND PCB PATTERNS ............ 21
9. PARTS LIST .............................................. 40
1o. PACKING METHOD AND PARTS ......................... 53