Leslie 720 organ actspk

Page 1

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CONTROL CIRCUIT VOLTAGES'
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TO AMPLIFIER

POWER SUPPLY

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NOTES:

I. AC LINE VOLTAGE TO BE AS INDICATED.

2.-ALL POWER SUPPLY AND AMILIFIER VOLTAGES ARE REFERENCED TO
CIRCUIT GROUND UNLESS O'HIERWISE INDICATED.

3. CONTROL CIRCUIT VOLTAGES ARE REFERENCE!) TO CONTROL
SUPPLY COMMON {PB-PINII. .

4. ALL DC VOLTAGES MEASURED WITH .06 VTVM AT ZERO AUDIO SIGNAL.
5. PI-PINS SHORTED T0 PIN 6 FOR ALL TEST CONDITIONS.
6. SIGNAL TEST: ZACH AMPLIFIER SEFARATELYI

A. CONNECT BOHM LOAD IN PLACE OF SPEAKER LOAO

3.351 R74 AT mmmum. APPLY APPROXIMATELY evous AT 400m
T0 Pl-PIN I (OH PIN 2}.

c. FOR SIGNAL VOLTAGES "0750 CD ADJUST R74 FOR 20 warm
{:25 VOLTS R.M.S.I ACROSS LOAD.

O. ADJUST 8' FOR OUTPUT CLIPPING. VOLTAGE ACROSS LOAD
SHOULD BE 20 VOLTS EMS. MINIMUM.

7. ALL RESISTORS ARE I/2 WATT IOII. UNLESS OTHERWISE NOTED.
8. GROUND SYMBOLS:

/J7 CHASSIS GROUND

:1: CIRCUIT GROUND

TREBLE HORN

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AMPLIFIER

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SPEAKER

8 INCII
SPEAKERS

EXPORT MODELS 50/60Hz
TRANSFORMrR WIRING

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Figure 16. Schematic, LESLIE Speaker
- Model 720