Service manual

sidered free of any major defect; if any of the following
conditions are not met, the transistor should be re-
placed. See Notes to Circuit Diagram (Figure L) for
transistor lead codes.
Ohmmeter Connections Ohmmeter Reading
NPN PNP
"Plus" Lead "Minus" Lead Transistor Transistor
Collector Emitter High High
Emitter Collector High High
Collector Base High Low
Emitter Base
*
Low
Base Collector Low High
Base Emitter Low
*Not a significant measurement.
Service Illustrations
The pages that follow contain a Parts Location
Drawing for the printed circuit board (Figure
K) and an
overall Circuit Diagram (Figure M). Foil circuit paths
are shown as shaded areas in Figure
K. The Circuit
Diagram shows all printed circuit board and
chassis-
mounted electrical parts.
GUARANTEE
This Shure product is guaranteed in normal use to
be free from electrical and mechanical defects for a
period of one year from date of purchase. Please
retain proof of purchase date. This guarantee includes
all parts and labor. This guarantee is in lieu of
ariy
and all other guarantees or warranties, express or
implied, and there shall be no recovery for any con-
sequential or incidental damages.
SHIPPING INSTRUCTIONS
Carefully repack the unit and return it prepaid to:
Shure Brothers Incorporated
Attention: Service Department
1501 West Shure Drive
Arlington Heights, Illinois 60004
If outside the United States, return the unit to your
dealer or Authorized Shure Service Center for repair.
The unit will be returned to you prepaid.
REPLACEMENT PARTS LIST (See Figures K and M)
Reference
Designation
Replacement
Kit No.*
I
Replacement Kit Consists Of:
Qty.
Part No.
Description
Printed Circuit Board Assembly
(with Potentiometers)
Capacitor, Electrolytic,
4
p,F, 25V
Capacitor, Electrolytic,
50
p,F, 35V
Capacitor, Electrolytic,
5
p,F, 35V
Capacitor, Electrolytic,
1 250 p,F, 40V
Capacitor, Electrolytic,
100 p,F, 25V
Capacitor, Electrolytic,
I 1000 ,uF, 40V
Capacitor, Electrolytic,
250
p,F, 40V
Silicon Rectifier,
50V, %A
Diode, Silicon, Computer, 75V
Silicon Rectifier,
IOOV, %A
Fuse, Ac, Slo-Blo, Pigtail,
1116A (SRI 10-2E only)
Connector, Female,
1 l-pin
Connector, Phono Jack,
Grounded Shell
Connector, Phone Jack,
3-Conductor, Open Circuit
Connector, Male, 3-pin Audio
Connector, Phone Jack,
3-Conductor, Two Circuits
Connector, Female,
Non-
Switched Ac (SR110 only)
Connector, 3-Pin AC (MAINS)
POWER
(SRllO-2E)
Ferrite Bead Ring
Commercial
Alternate
None
Mallory
TNT405U050POA
Sprague TE1307;
CDE NLW 50-50
Sprague
TE1303;
CDE NLW 5-50
None
Sprague
TE1211;
Mallory MTA
100F35; CDE
NLW 100-25
None
None
Motorola 1
N4001
TI or GE IN4148
Motorola 1 N4002
Littelfuse 3.5.062
Amphenol 126-805
Switchcraft 351
1A
Switchcraft 128
Switchcraft C3M
Switchcraft
1128
None
None
Stackpole 57-0181
;
Ferronics 21 -031 J
*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 in RKC quantities.
7