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Ohmmeter Connections
Ohmmeter Readina
resistor between the +30 Vdc s u p ~ l v and the orange
-
~
-
~
~
-
-
~
-
~
-
-
~
-
NPN
PNP
lead (gray lead still grounded).
he
*LED should light
when power is applied to the Equalizer. If it does not
"Plus" Lead "Minus" Lead
Transistor
Transistor
light it should be
replaced. N O ~ E : D~ not check LED^
Collector
Emitter
High
High
with an ohmmeter; the ohmmeter may damage the LED
Emitter
Collector
High
High
or give erroneous readings.
Collector
Base
~ i g h
Low
Emitter
Base
Low
Service Illustrations
Base
Collector
Low
High
The parts location photo (Figure 7) used in conjunction
Base
Emitter
Low
*
with the overall Circuit Diagram (Figure 11) provides
identification of all chassis-mounted assemblies and com-
* NO^ a s ~ g n ~ f ~ c a n t
measurement
ponents. Reference to the overall Circuit Diagram and
the Printed Circuit Board Parts Location drawings (Fig-
To check the LED OVERLOAD indicator disconnect the
ures 9 and 10) provides the means for quickly locating
orange LED lead from terminal E of the amplifier printed
board-mounted components. Foil circuit paths are shown
circuit board A1 and connect a 1, 1.5, or 2.2 kilohm
as shaded areas in Figures 9 and 10.
REPLACEMENT PARTS LIST (See Figures 7, 9, 10
and
11)
- -
CHASSIS-MOUNTED PARTS AND ASSEMBLIES
Commercial
Alternate
*
Parts listed as RKC Kits should be ordered by that kit number. Any orders received for piece parts where RKC Kit number is
shown will be shipped i n RKC quantities.
10
Reference
Designation
Replacement
Kit No.
*
Replacement Kit Consists Of:
90A2236
90A2239
866628
8611628
86B632
86J628
86A404
90A1989
80A297
80A322
90R2600
95A482
95A198
Printed Circuit Board Assembly
(Amplifier)
Printed Circuit Board Assembly
(Equalizer)
Capacitor, Electrolytic,
400 , F ,
15V
Capacitor, Electrolytic,
250 , F , 40V
Capacitor, Electrolytic,
1000 , F , 40V
Capacitor, Electrolytic,
47 or 50 p F , 35V min.
Silicon Rectifier, 100V, 112A
Diode Assembly, Light-Emitting
Fuse, AC, 1 /16A, 250V, Slo-Blo,
Pigtail (SR107)
Fuse, AC, 1 /8A, 250V, Slo-Blo,
Pigtail (SR107-2E)
Connector, Phone Jack,
3-Conductor, Open Circuit, LlNE
INPUT and LlNE OUTPUT
Connector, Female, 3-Pin
Audio, LlNE INPUT
Connector, Male, 3-Pin
Audio, OUTPUT
A1
A2
C3
C4
C5
C6
D l -D5
D6
F1
F1
J1, J4
J2
J3
Description
Qty.
None
None
Sprague
WH11 D407G016K
CDE BR250-50
Sprague TVA 1316
Sprague 30D-TE1200;
CDE NLW 50-50
Motorola 1 N4002
Monsanto MV5023
Littelfuse 31 5.062
Littelfuse 31 5.125
Switchcraft 128
Switchcraft C3F
Switchcraft C3M
Part No.
-
-
-
-
-
-
RKC21
RKC133
-
-
-
RKl19P
RK122P
-
-
-
-
-
-
4
1
-
-
-
1
1
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