Insert assemblies for MIC LEVEL Input three-pin, pro-
fessional, female connectors for channels
2
through
7
(J2-J7) may be removed by first removing the transformer
or transformers
(TI-T8) mounted above the desired con-
nector.
Three-pin, professional, male, audio connector J14 (LINE
LEVEL Output) may be removed by first removing the
bracket containing the Program Mute board.
The TONE OSC LEVEL
Switch/Control (R9), METER
SENSITIVITY Control
(R17), and POWER ON-OFF Switch
(S29) are accessible by removing the knob and retaining
nut on the desired control, and removing the two screws
securing the Power Supply bracket to the side panel.
Carefully swing the bracket to one side, exposing the
control.
All push-button switches, with the exception of the
FEEDBACK FILTER Switches which are fastened to the
Feedback Filters board, may be removed by disconnect-
ing electrical connections, and either unscrewing the
screws of the switch module frame or bending the switch
module mounting tab into line with its slot and removing
the individual switch module.
TRANSISTOR AND DIODE REMOVAL
Most transistors and all diodes used in the Console are
mechanically supported by their leads. When replacing
these devices, proper lead configurations must be followed.
Minimum soldering heat (preferably with a low-wattage
soldering iron) should be used to avoid damage to the
device. Be sure to place heat-shrinkable tubing or "spa-
ghetti" on leads where the original device contained such
tubing. Transistor lead codes are included in the Notes
to Circuit Diagram (Figure 30, Page 41).
IMPORTANT:
Be sure to replace ferrite bead rings on those transistor
leads where they were removed.
TRANSISTOR AND DIODE CHECKING
Defective transistors and diodes may be located by
use of a standard ohmmeter such as a
Simpson 260. Polar-
ity of the ohmmeter must be verified before these checks
are made.
With a known diode orientation, measure the diode re-
sistance in the forward and reverse directions. The lowest
meter reading will establish the probe at the cathode end
(schematic symbol arrow points to cathode) as the "minus"
probe while the other probe will be "plus." Some ohm-
meters are not polarized in this manner with relation to
"volts plus probe" and "volts minus probe." With the
ohmmeter "plus" probe on the anode end of
a
diode, and
the "minus" probe on the cathode end, the ohmmeter
should read approximately 2000 ohms or less. With the
meter probes reversed, a reading of about 10,000 ohms or
more should be obtained. If either of these conditions is
not met, the diode should be replaced.
To check transistors, the ohmmeter should
be set to
the 100- or 1,000-ohm scale. Transistors and diodes must
be removed from the circuit before testing. If all conditions
in the following table are met, the transistor may be con-
sidered free of any major defect; if any of the following
conditions are not met, the transistor should be replaced.
See Notes to Circuit Diagram, Figure 30, Page 41, for tran-
sistor terminal codes.
OHMMETER CONNECTIONS
"Plus" Lead "Minus" Lead
Collector Emitter
Emitter Collector
Collector Base
Emitter Base
Base Collector
Base Emitter
'Not
a
significant measurement.
OHMMETER READING
NPN PNP
Transistor Transistor
High High
High High
High Low
*
Low
Low High
Low
*
SERVICE ILLUSTRATIONS
Immediately following the parts list on the pages that
follow are parts location drawings (Figures 19 to 29, Pages
33-39), and an overall Circuit Diagram (Figure 31, Pages
44-45). Once a board has been located through the parts
location photo (Figure 17, Page
19), the components on
that board may be located from the corresponding parts
location drawing. Foil circuit paths are shown as shaded
areas on the drawings. The overall Circuit Diagram (Figure
31, Pages 44-45) shows all board circuits and
chassis-
mounted parts.
OPTIONAL ACCESSORIES
The following optional accessories are specially de-
signed for use with the Shure
SR101 Series
2
Audio Con-
sole:
AlOlA Carrying Case
AlOlB Panel Lamp Accessory
SR110 Professional Monitor Mixer
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 any and all other guar-
antees or warranties, express or implied, and there shall
be no recovery for any consequential 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.
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