Sansui QRX 8001 9001 Service Manual

Page 2

TABLE OF CONTENTS

Section Title Page

1. SPECIFICATIONS ......
2. BLOCK DIAGRAM
2- 1. QRX-8001
2- 2. QRX- 9001
3. OPERATION OF FM DOLBY SYSTEM
4. ADJUSTMENTS .....
4- 1 Audio Section .
4- 2 Tuner Section .. ,8.9.10.
4- 3. Dolby Circuit Adjustment (QRX- 9001 Only)
11,12

5. PARTS LOCATION & A S LISTS...
5- 1. F- 2636 Volume & Filter Circuit Board .
5- 2. F 2634 4 Ch Function Switch & REC
CAL Ton Circuit Board.
5- 3. F- 2638 Power Supply Circuit Board.
5» 4. F- 2637 Tone Control Circuit Board
5- 5. F-2639 Pre-Power Supply Circuit Board . ..
5- 6. F-2614 Tuner Circuit Board .. 14
5- 7. F-2615 Tuner Sub Circuit Board . l4
5- 8. F-2590 Tuner Circuit Board . 15
5- 9. F-2624 Driver Circuit Board ...........
5-10. F-2632 Selector Circuit Board .........
5-11. F-26421ndicator Circuit Board
5-12. F»2087 QS Matrix Circuit Board ...
5-13. F-ZOBB QS Phase Discriminator Section
Circuit Board .....................
5-14. F- 2689 Protector Circuit Board
5-15. F- 2589 Equalizer 8: CD- -4 Circuit Board
5'16. F- -2688 Dolby Circuit Board. 17
5-17. F 2640 IIIUmination Circuit Board (1) . 17
5-18. F- 2641 Illumination Circuit Board (2) H . 17
5-19. F-2635 4-ch Function Switch 8 REC
CAL Tone Sub Circuit Board .............. 17
5»20. F-2633 Dolby Change Circuit Board ........ 18
5-21. F-2686 4-ch Function Switch & REC
CAL Tone Sub Circuit Board ......... 18
5- 22. F- -2652 Dolby Sub Circuit Board. 18
5-23 Figures ..... 18
6. OTHER PARTS . 19
6- 1 QRX- 8001 19
6- 2. QRX- -9001. 20
6- 3 Exploded View (QR - 20
7. SCHEMATIC DIAGRAM ...... 21
7- 1. QRX-8001 Tundr Section 21
7- 2. QRX-8001 Audio Section 22
7- 3. QRX- -9001 Tuner Section 23
7~ 4. QRX- 9001 Audio Section . 24

7- 5 QRX- 8001/9001 4- Channel Section

8. THREADING OF DIAL CORD
8 1. Threading of Dial Cord

8- 2 Attachment of Dial Pointer .

9. PACKING LIST .................... BACK COVER

10. ACCESSORY PARTS LIST .......... BACK COVER

1. SPECIFICATIONS

AUDIO SECTION
(QRX-BOOD
POWER OUTPUT
Min. RMS. four channels driven, from 20 to 20,000Hz, with
no more than 0.3% total harmonic_distortion
40 watts per channel into 8 ohms
40 watts per channel into 4 ohms
Min RMS four channels driven at 1,ooon with no
more than 0.3% total harmonic distortion
43 watts per channel into 8 ohms
43 watts per channel into 4 ohms
Min. RMS. both channels driven from 20 to 20,000Hz, with
no more than 0.3% total harmonic distortion and SPEAK»
ERS/MODE switch at 2-CH A (POWER X2)
100 watts per channel into 8 ohms
Min RMS both channels driven at 1,00on with no
more than 0.3% total harmonic distortion and
SPEAKERS MODE switch at 2-CH A (POWER AZ)
110 watts per channel into 8 ohms

POWER OUTPUT
Min. RMS. four channels driven, from 20 to 20,000Hz, with
no more than 0.3% total harmonic distortion
60 watts per channel into 3 ohms
60 watts per channel into 4 ohms
Min RMS four channels driven at 1 OOOHZ with no
more than 0. 3% total harmonic distortion
65 watts per channel into 8 ohms
65 watts per channel Into 4 ohms
Min. RMS. both channels driven, from 20 to 20,000Hz, with
no more than 0.3% total harmonic distortion and SPEAK-
ERS/MODE switch at 2>CH A (POWERXZ)
120 watts per channel into 8 ohms
Min RMS both channels driven at1.000Hz with no
more than 0.3% total harmonic distortion and
SPEAKERS MODE switch at 2-CH A (POWER [(2)
140 watts per channel into B ohms
LOAD IMPEDANCE
SPEAKERS/MODE Switch at 2- CH- A, 4- CH-A and 4-CH~B
. .4 and 8 ohms
SPEAKERS/MODE SWItch at 2- C-H A(POWER X 2) and 4- -CH7
AB+ . 8 ohms
..20 to 20,000Hz at or below
rated min. RMS power output
and total harmonic distortion
TOTAL HARMONIC DISTORTION
...................... less than 0.3% at or below
rated rnin. RMS power output
INTERMODULATION DISTORTION (70HZ: 7kHz 4:1 SMPTE
method) .................. less than 0.3%
FREQUENCY RESPONSE (at 1 watt)
...................... 20 to 30,000Hz :1dB
RIAA CURVE DEVIATION (PHONO)
..-I1.0dB, 71.0dB (30HZ to 15kHZ)
DAMPING FACTOR... ..approximately 30 at 8-ohm load
INPUT SENSITIVITY AND IMPEDANCE
(1kHz, for rated power output)
PHONO (Z-channel) ...... 2.5mV/50 kilohms
(Max. input capability: 150mV at 1kHz, less than 0.3%
total harmonic distortion.)
TAPE PLAY (pin jacks) .100mV/50 kilohms
TAPE 1'REC/PLAY (DIN socket)
. ..100mV/50 kilohms

POWER BANDWIDTH.

AUX . 100mV/50 kilohms

MIC ............ ..4mV/10 kilohms
RECORDING OUTPUT

TAPE REC (pin jacks) ...... 100mV

TAPE-1 REC/PLAY (DIN socket)

...................... 30mV
CHANNEL SEPARATION (at rated output 1kHz)
PHONO ......... .better than 45dB
TAPE PLAY, AUX. ..better than 45dB
HUM AND NOISE
PHONO . .
TAPE PLAY, AUX . . .

..better than 70dB
..better than 80dB