Sansui QRX 6001 Service Manual

Page 2

QRX-5001

This service manual is designed for service engineers to repair, adjust,
maintain and order the replacement parts of the QRX-6001 correctly.
When ordering the parts, use the stock number and parts name specifical-
ly referring to the Parts Locations & Parts Lists.

For general usage and maintenance of the unit, please refer to the
Operating Instructions attached with the unit.

TABLE OF CONTENTS

Section Title Page Section lla- fag
1. SPECIFICATIONS ......... 6-6. F-2436A Driver Circuit Board ................ 18
2. BLOCK DIAGRAM ........ 6'7. F-2475 CD-4 Sub Channel Circuit Board ..19, 20
3. ALIGNMENTS AND ADJUSTMENTS ..5 6-8. F-2086 CD-4 Main Circuit Board ..21

3-1. Driver Circuit Board Adjustment 6 6-9. F-2087 Q5 Matrix Circuit Board .. . .. ....21
3-1 FM 1F Alignment ------------- 6 6-10. F-2088 QS Phase Control Circuit Board VVVVVV 22
3-3. FM Dial Calibration and RF Alignment ........ 7 6-11.F-1461A Protector Circuit Board _____
3'4 FM $ignal Meter, Mono Distortion and 6-12. F-2427 Power Supply Circuit Board .. ..
3J5 mggnlxglfdyuslment. " """""" 7' 8 6-13 F- 2428 Filter & Power Supply Circuit Board ..23
gnment '8 6-14. F- 2423 Filter & Switch Circuit Board ........ 23
3-6' AM IF Dial Calibration and RF Alignment 9 10 6-15 Interchangeability of Transistor and Diode 24
4. THREADING OF DIAL CORD .11 6-16. Oth P t {T so "24
5. TROUBLESHOOTING CHART ........ .12 ' er a 5 Op ' e). """""""""""
5-]. Troubleshooting on Power Supply Section .12 647 Other Parts (BottomSlde) """"""" 24
5-2. Troubleshooting on Main Circuit Section ....12 618 Other Parts (Front Sfde) Section 1 ' "
5_3_ Troubleshooting on Tone Control Circuit 6-19. Other Parts (Front SIde) Section 2 ......... 26
Section .................................... 12 7. SCHEMATIO DIAGRAM OF
5 4. Troubleshooting on Phone Circuit Section. ..12 TUNER SECTION ............................ 27
5-5 Troubleshooting on Tuner Circuit Section . . . . 13 8, SCHEMATIC DIAGRAM 0F
6. PARTS LOCATION AND PARTS LIST ., .14 AUDIO SECTION ............................ 28

51 F 1519C FM Wand Ck ~ ~14 9. SCHEMATIC DIAGRAM 0F 4-CH SECTION ..29

6'2 F450: Tun. or? .Bm'd " 15'" 1o. scHEMATIc DIAGRAM OF POWER SUPPLY

6'3 267 Eqa"ze C° B°ard " '17 SECTION ................................... so

6-4. F-2425 Tone Control Circuit Board .17

6-5. F-2431 Power Supply Circuit Board for 11. PACKING LIST ................ back cover
Tuner Section .............................. 17 12. ACCESSORY PARTS LIST .......... back cover