Sansui QSD 1 Service Manual

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A CHANNEL SIEREO

SERVICE MANUAL

4-CHANNEL SYNTHESIZER DECODER

SANSlII BSD-l

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Sansui. QSD-1

1. SPECIFICATIONS

Ali-CHANNEL DECODER SECTION

OUTPUT VOLTAGE

TYPE ................... QS Decoder/Q5 Synthesizer 4-CHANNEL OUTPUT ,..,300mV
(Q5 vario~matrix Circuit built NOISE LEVEL (Level Control at MAX.)
in) .................... less than ZSOII/V
SEPARATION GENERAL
ADJACENT CHANNELS. . . .ZOdB POWER REQUIREMENTS ,.. 100V, 120V, 120V, 240V

DIAGONAL CHANNEI S ..30(ll5 SO/GOH/
TOTAL HARMONIC DISTORTION (TOOOHZ) POWER CONSUMPTION. . . ,TOVV
.................... loss than 0.1 a SEMICONDUCTORS
FREQUENCY RESPONSE 20 to 30,000Hz TRANSISTORS .......... 35
INPUT SENSITIVITY DIODES ................ 16
Z-CHANNEI INPUT ...... 100mV L.E.D .................... 1
TAPE MONITOR (Z-CH) ..100mV ZENER DIODE .......... 1
4-CHANNEL INPUT . ..140mV ICS ...................... 12

Max. input mpuljility (Level SOL at MIN THD 0.5%)

.................... 25V

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improvements.

Serf/on TIIII Pagl'
1, SPECIFICATIONS .......................................... 1
2. PARTS LOCATION AND PARTS LIST ........................ 2

271. F2461 Power Circuit Board .......................... 2
2-2. F2462 Filter Circuit Board .......................... 2
2-3. F2463 QS Vario-Matrix Circuit Board (Low Band) ..3,4
24. F2464 QS Vario-Matrix Circuit Board (Middle Band) 3,4
2-5. F2465 Q8 Vario-Matrix Circuit Board (High Band). .3,4
2-6. F2466 Phase Shifter ................................ 5
2-7. F2467 Include in all Circuit (Flat Amp) ............ 5,6
2-8. Other Parts .......................................... 7
3. BLOK DIAGRAM (1), (2) .................................. 8.9
3-1. FIGURES ............................................ 8
32. Q8 VARIO-MATRIX BLOCK DIAGRAM ................ 8
3-3. IC CONFIGURATION .................................. 8
4. SCHEMATIC DIAGRM .................................... 10
4-1. F2467 INCLUDE IN ALL CIRCUIT .................... 10
4-2. F2466, F2462 FILTER, PHASE SHIFTER .......... 11
43. F2463 VARIO-MATRIX (LOW RANGE) .............. 12
4-4. F2464 VARIO-MATRIX (MIDDLE RANGE) ............ 13
4-5. F2465 VARIOMATRIX (HIGH RANGE) .............. 14
5. PACKING LIST .................................... back cover
6. ACCESSORY PARTS LIST .......................... back cover

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' Design and specifications are subject to change for posstble