Shure UC Service Manual

SERVICE MANUAL CHANGE NOTICEUC4 DIVERSITY RECEIVERChanges or corrections have been made to this service manual. Update your service manual by replacin

Shure UC4 Diversity ReceiverParts Designations925C1045 (TK)Functional TestVerify operation and reported malfunction, referring to the productUser’s Gu

Shure UC4 Diversity Receiver10Parts Designations25C1045 (TK)Reassembly1. Insert the rear circuit board components into their mating chassisholes, and

Shure UC4 Diversity ReceiverParts Designations1125C1045 (TK)Service ProceduresReference MaterialRefer to the Service Equipment Manual for standard tes

Shure UC4 Diversity Receiver12Parts Designations25C1045 (TK)Test EquipmentMost test equipment needed is described in the Shure Wireless Service Equipm

Shure UC4 Diversity ReceiverParts Designations1325C1045 (TK)Test Set-UpJ201J101J501J602LABELJ601S601TPRF2FL201FL205 FL105FL101TPRF3C319 C318C605U601C6

Shure UC4 Diversity Receiver14Parts Designations25C1045 (TK)Table 2 lists the group and channel switches, and the operating frequencies for all the te

Shure UC4 Diversity ReceiverParts Designations1525C1045 (TK)Alignment1. Connect the UC4 receiver as shown below in Figure 6.2. Connect the rf signal g

Shure UC4 Diversity Receiver16Parts Designations25C1045 (TK)Power SectionChecking the dc power will insure the correct dc biasing is applied to the op

Shure UC4 Diversity ReceiverParts Designations1725C1045 (TK)Local OscillatorPerforming the local oscillator alignment insures that the unit is fine-tu

Shure UC4 Diversity Receiver18Parts Designations25C1045 (TK)Rf AlignmentChannel A and B rf alignments are performed to increase the input signal stren

E1999, Shure Incorporated Printed in U.S.A.25C1045 (TK)Service ManualUC4 Diversity UHF Receiver25C1045 (TK)CharacteristicsGeneralThe Shure UC4 Diversi

Shure UC4 Diversity ReceiverParts Designations1925C1045 (TK)Rf Channel ARF SIGNAL GENERATORAUDIO ANALYZERNOTE: DC VOLTAGES ARE PRESENT AT MOST RF TES

Shure UC4 Diversity Receiver20Parts Designations25C1045 (TK)Audio AlignmentAudio alignment insures that the compressor output in the transmitterexactl

Shure UC4 Diversity ReceiverParts Designations2125C1045 (TK)7. Apply the rf signal to the antenna port of channel B (J101).8. Put the positive (+) ter

Shure UC4 Diversity Receiver22Parts Designations25C1045 (TK)GroupGroupCode Deviation(kHz)1 kHz Audio Balanced Output1 kHz Audio Unbalanced OutputUA A

Shure UC4 Diversity ReceiverParts Designations2325C1045 (TK)Product System SpecificationsAfter tuning, the unit should meet the following specificatio

Shure UC4 Diversity Receiver24Parts Designations25C1045 (TK)Bench ChecksSet-UpDc voltages are present at most rf test points. Use dc blocks to protec

Shure UC4 Diversity ReceiverParts Designations2525C1045 (TK)n If audio is detected and the audio LEDs are NOT lit, there aretwo possibilities. Either

Shure UC4 Diversity Receiver26Parts Designations25C1045 (TK)Replacement Parts and DrawingsProduct ChangesFive variations of the Shure UC4 Diversity Re

Shure UC4 Diversity ReceiverParts Designations2725C1045 (TK)Table 4Replacement PartsReferenceDesignationDescriptionShure PartNumberA1 Cable/connector

Shure UC4 Diversity Receiver28Parts Designations25C1045 (TK)Table 5PCB Assembly PartsReferenceDesignationDescriptionShure PartNumberC333 Capacitor, 10

Shure UC4 Diversity Receiver2Parts Designations25C1045 (TK)Circuit DescriptionThe audio circuit and rf circuit description will describe only onechann

Shure UC4 Diversity ReceiverParts Designations2925C1045 (TK)ReferenceDesignationShure PartNumberDescriptionL101,102,103,104,105,201,202,203,204,205,30

Shure UC4 Diversity Receiver30Parts Designations25C1045 (TK)ReferenceDesignationShure PartNumberDescriptionU704,705 8 Bit Serial in Parallel Out Shift

Shure UC4 Diversity UHF ReceiverUC4 Diversity UHF Receiver: Printed Circuit Board Legend

Shure UC4 Diversity ReceiverParts Designations325C1045 (TK)If the noise levels are not within 6 dB of each other, the channel witha noise voltage 6 dB

Shure UC4 Diversity Receiver4Parts Designations25C1045 (TK)Rf SectionFigure 3. UC4 Rf Section Block DiagramDIELECTRICFILTERDIELECTRICFILTERLNAFIRSTMIX

Shure UC4 Diversity ReceiverParts Designations525C1045 (TK)Local Oscillator (LO)The first local oscillator (LO) is common for channel A and channel Br

Shure UC4 Diversity Receiver6Parts Designations25C1045 (TK)MicrocontrollerThe microcontroller section consists of a U703 microcontroller and atwo digi

Shure UC4 Diversity ReceiverParts Designations725C1045 (TK)Rotary Switches for Frequency SelectionA 10-position group switch (S701) and a 16-position

Shure UC4 Diversity Receiver8Parts Designations25C1045 (TK)NotesThis page intentionally left blank.