Sansui QRX 2000 Service Manual

Page 2

This service manual is designed for service engineers to repair, adjust,

maintain and order the replacement parts of the QRX-ZOOO correctly.

When ordering the parts, use the stock number and parts name speci-

fically referring to the Parts Locations & Parts List.

Fo

r general usage and maintenance of the unit, please refer to the

Operating Instructions attached with the unit.

TA

BLE OF CONTENTS

Section T_it/e Pa_ge
l. SPECIFICATIONS ................................................ 2
2. BLOCK DIAGRAM AND VALUE OF EACH LEVEL ................ 3
3. THREADING OF DIAL CORD .................................... 4
4. ALIGNMENTS AND ADJUSTMENTS ............................ 5

4-1. Driver Circuit Board Adjustment ............................ 5

4-2. FM IF Alignment ........................................ 5, 6

4-3. FM Dial Calibration and RF Alignment ...................... 6

4-4. MPX Alignment ............................................ 7

4-5, AM IF, Dial Calibration, RF Alignment .................... 7, 8

5. TROUBLESHOOTING CHART .................................... 9

5-1. Troubleshooting on Power Supply Section .................... 9

5-2. Troubleshooting on Audio Section .......................... 9
5-3. QS SYNTHESIZER or Q5 REGULAR MATRIX of

FUNCTION Switch inoperative

(2-CH 0f FUNCTION switch inoperative) .................... 9

5-4. Troubleshooting on Tuner Section ...................... 9,10

6. PARTS LOCATIONS AND PARTS LISTS ....................... 11

6-1, F- 1493 Equalizer Circuit Board ....... . .. 11

6-2. F1496 Tone Control & Power Supply Circun Board .......... 12

6-3. F 1498A Tuner Circuit Board ............................ 13,14

6-4. F-I492 Vario-Matrix Circuit Board .................. 15,16,17

6-5. F-I49S Driver Circuit Board ................................ 18

6-6. Other Parts (Front Side) .............................. . 19, 20

6- 7. Other Parts (Top Side) .................................... 21

6- 8. Other Parts (Bottom Side) .................................. 22

7. PACKING LIST ................................................ 23

8. ACCESSORY PARTS LIST ...................................... 23

9. SCHEMATIC DIAGRAM OF TUNER SECTION .................. 24

10. SCHEMATIC DIAGRAM OF AUDIO SECTION .................. 25

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7. PACKING LIST

Part: No. Stock No.

Dascrlptlon

I 90] 7350
2 9027723
3 900772!

Inner Packing (upper)
Stylolocm Packing
Carton Case

8. ACCESSORY
PARTS LIST

Stock No. Ducrlmlon
9406020 Polishing Cloth
04336I 0 2A Quick Acting Fuse
9207570 Opevuling Instructions
9227570 Operating Instruction sheei
3820010 [FM Antenna

AM Antenna

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