Master audio HD 1200 Service Manual

Price $7.50Model 1200 PowermixerSERVICE MANUALISSUE NO. 1Manufactured bySHURE BROTHERS INC.222 Hartrey AvenueEvanston, Illinois 60202-3696Copyright 19

VR1101 OUTPUT VOLTAGE OFFSET ADJUSTMENT1.Connect a dc voltmeter between SHR-11 terminal AC andground (see Figure 2).2.Adjust VR1101 so that V1 equals

If any of the heat-sink-mounted parts (voltage regulatorsU1408, U1409 and U1410, or silicon rectifiers D1423 and D1424)is replaced, be sure to apply a

SHR-04 CHANNEL BOARDSHR-09 LIMITER BOARDThe SHR-04 Channel Boards are assembled and installed inTo free SHR-09 LIMITER BOARD from the Mounting Panel,p

To check LEDs, connect the cathode (notch or flat on flange,tab on lead or short lead) of the LED to the negative terminal of astandard 9 V transistor

REPLACEMENT PARTS LISTThe following list provides information on replacement parts for the Shure Model 1200 AUDIOMASTER Powermixer. Shure part numbers

REFERENCE DESIGNATONMP6MP7MP8MP9MP10P1003-P1004P1401Q501, Q1110, Q1403Q1101, Q1114Q1102Q1103-Q1104Q1105,Q1109Q1106Q1107-Q1108Q1111Q1112-Q1113Q1401-Q14

REFERENCE DESIGNATIONR1126-R1127R1128R1301R1402R1403, R1454R1406-R1407R1408R1411R1416R1434R1439R1440, R1455R1441R1450R1456R1457R1460R1461-R1462S1S2S3S

BLOCK DIAGRAM

LEAD CODES

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SPECIFICATIONSTypeMono PowermixerFrequency ResponseFlat +1, -3 dB, 40 Hz to 20 kHz (any input to any output)InputsSix input channels: six unbalanced h

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21CIRCUIT DIAGRAM-1(SHR-01, SHR-02, SHR-03, SHR-04)

22CIRCUIT DIAGRAM-2(SHR-05, SHR-07, SHR-08, SHR-10)

CIRCUIT DIAGRAM-3(SHR-09, SHR-12, SHR-14)23

CIRCUIT DIAGRAM-4(SHR-06, SHR-11, SHR-13, SHR-14)24

MODEL 1200 SERVICE MANUALTABLE OF CONTENTSDescription...1For Years of Dependable Service...2Trouble

DESCRIPTIONThe Shure Model 1200 AUDIOMASTER® Powermixer is aOther effects devices or an equalizer can be connected throughcompact, flexible microphone

FOR YEARS OF DEPENDABLE OPERATION...The AUDIOMASTER® System is exceptionally well designed,with all components of the highest quality, operating well

SYMPTOMPROBABLE CAUSE AND CORRECTIONINPUT OVERLOAD LED flashingNOTE: Occasional flashing is acceptable1.Adjust INPUT ATTENUATION counterclockwise to r

PRINTED CIRCUIT BOARD AND PARTS LOCATIONFIGURE 1WARNINGCAUTIONAfter replacing high-voltage parts such as the fan, powercord, rear panel convenience re

AC VOLTAGE MEASUREMENTSNumbers within rectangular symbols on the circuit diagramsdenote ac voltages at that point under the following testconditions:1