Technics SL-QL5 - Overall Schematic Diagram; Complete System Schematic

1 2 3 4
m@ SCHEMATIC DIAGRAM
(This schematic diagram may be modified at any
A time with the development of new technology.)
Notes:
1. $1 : On/off (power) switch.
2. $301 : Start switch.
3. $302 : Stop switch.
4. .$303.. . ;.Cueing, control switch.
5. $304 : Repeat switch.
6. $305 — ; Speed selector switch in ‘‘auto” position.
7. $306 : Record detector switch.
(It is detects the record on the turntable.)
8. S307 : Reset switch in ‘‘on’’ position.
(Upper cabinet is closed.)
B 9. $601 : Rest switch in ‘‘off’’ position.
(Presently tonearm is on rest.)
10. $701 : Record size.detection switch.
11. The voltage value and waveform are the standard values of this
measured by OC electronic voltmeter (high impedance) and
oscilloscope on the basis of chassis. Therefore, the voltage value
and waveform may include some errors due to the internal
impedance of the tester or the measuring set.
* [-__] is the voltage when turntable is in stop.
*( ) is the voltage when turntable is in rotation.
* [~ _J is the voltage when tonearm is in lead-in mode.
#< >is the voltage when tonearm is in return mode.
Positive voltage lines.
Cc 12,
*The part No. of diodes mentioned in the schematic diagram stand
for production part No. Regarding the part No. with o mark the
production part No. are different from the replacement part No.
Therefore, when placing an order for replacement part, please
use the part No. in the replacement parts list.
> BT301
33rpm 1Oms.(101Hz)
Posie Tins 198502) 33rpm 20 ms 505Hz)
45rpm 14 ms (68.25Hz)
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R319 3.3K R318 3.3K R317 3.3K
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ARM POSITION
DETECTION CIRCUIT
Q304
2SB641
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OFFSET ERROR
ONI261 ANGLE DET.
ARM POSITION
SENSOR
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ARM MOTOR
ANGLE DET.
S601
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CONTROL CONTROL