Leslie 520 organ actspk

Page 1

SPEAKERS

NOTES I

I. AC LINE VOLTAGE TO BE AS INDICATED.
2. ALL POWER SUPPLY AND AMPLIFIER VOLTAGES ARE REFERENCE!) TO

CIRCUIT GROUND UNLESS OTHERWISE

INDICATED.

3. ALL DC VOLTAGES MEASURED WITH DC VTVM AT ZERO AUDIO SIGNAL.

3"

PI-PIN 5 SHORTED TO PIN 6 FOR ALL TEST CONDITIONS.

5fSIGNAL TEST AND ADJUSTMENT: [EACH AMPLIFIER SEPARATELY}
A. CONNECT 8 OHM RESISTIVE LOAD IN PLACE OF SPEAKER LOAD.

B. SET R74 AT MINIMUM. APPLY APPROXIMATELY 2 VOLTS AT 400m
To PI-PINI (0R PIN 2).

C. FOR SIGNAL. VOLTAGES NOTED

2.5 VOLTS R.M.S.I ACROSS LOA .
D- ADJUST R74 FOR OUTPUT CLIPPING} VOLTAGE ACROSS LOAD
SHOULD BE 20 VOLTS R.M.S. MINIMUM. '

E. ADJUST AMPLIFIERS FOR EQUAL GAIN. WITH LO VOLTS APPLIED
ADJUST R74 FOR 7.0 VOLTS ACROSS LOAD.

TO Pl-PINI (OR PINZI

71$

/7I7 CHASSIS GROUND

_L

_-.

CIRCUIT GROUND

ALL RESISTORS ARE [/2 WATT IO% UNLESS OTHERWISE NOTED.
GROUND SYMBOLSI

, ADJUST R?4 FOR 20 WATTS

II
CS

NOT USED
I 20x

Pl
7 NC
3 NC
CONTROL CIRCUIT 6
COMMON BLUE
8 NC
CONTROL SUPPLY GREEN
COMMON 5 g; I
NC 53 I r
'4
10 NC P3 6 5 3 p I 2 _
/77
P12
SIZ
CHANNEL I A . N
WIGHT) IvJflQW « I . BROW
CHANNEL 2 2 RED . _ _
(LEFT/PEDAL) L_I
CIRCUIT GROUND 4 WWW I « I .
8' OUT wRITE a J
+ II
a; NE NC N
3; IIIGA T2 .JZZVAI P6 2 4 5 3 T0 AMPLIFIR
__f\ LK._, 5 L0 *0?! se\ 2 V4 :3 3 \3 5 4 2 I/SIO
WTVAC __ yam *(?+ I
_/ 03 250/35 __ O
o T :-
PZ .
/77
O4
06 1. 4 Bfl/IOW . .
OT 8
n
0+ m x
92:3 3 E, 8 "£3
08 D 8 <3 '0
O K
m N
+ - o
3? a 4
m I 05'".
O U
I g N 8
I 9 a: I +29v q
' WE;
GO REL.) E
N23 "59)! 5 g
E %4
E 2 E
POW:R SUPPLY
5-) I
7- 35

IRE

thN

85.86,
SID

EB

Q4, 013', GM
2N3055

87 P7

88

WHITE I
L_@Mfl

FROM POWER SUPPLY

X C48
Ir 22/15

C48
22/[5

974

FROM PO WER SUPPLY

520 SCHEMATIC DIAGRAM (NOM"%m27 j

P7. P9.
O 2
' PI5.PI7 (Ax/)0
' Q1
sass
2 SI2
SI5.S|7
e 33.31:
PILFIZ 8~INCH 8-INCH
' SPEAKERS SPEAKERS
RIGHT SIDE LEFT SIDE
/° (VIEWED FROM (VIEWED FROM
_ FRONT) FRONT)
E C
E 8
B on
0'2 MSPS 4382
2N3054 TOO dcr TYP. ,
UPPER
Egan 253353, 3
4- NP
cao
P5
>+39V > ¢ 0 <
TH- 29V g RED 3 LOWER
C 0:3 3'" VI ,.
_, I.2I<
4 quv lgV JVVV
2:: 0/25980 3
2 0 '5 2;! I PIS SIS
TNC fi "30 OVOLTS .m 0 RED
/ _ 014 52%
C Li
S E .033
V Xéw
a? n x _, C :0 C cum: BLACK
2w, it- A 3 § ~8
0I2
R75 ~4OV
.42v
O
27K
w ZNZVM w
E 9 33:23:33 _.
CHANNzLI
k AMPLIFIER
x Z
S #3
PIC 12.: 0;:
>+39v
+29V
3 OI3 %
.. O
4 'H4OV gikg
5 t0
2 In 0 PI? SI? 32MH
S <13
1 NC I! 70 ovo Ts (V? ORN - L3'1
L/ '33 OI4
0:
3% m g": BLACK I g
m 8;? WE. X E
3&2; OA
w 3.00dCr

R75

I
4:.
O
<
470

F'x/fl/IDT \AflrIC-l P

SKA/CHILI-

IS-INCH
BASS SPEAKER