Shure uc1 Service Manual

Shure Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.

UC UHF Wireless System

SERVICE MANUAL CHANGE NOTICE

UC1 UHF BODY-PACK TRANSMITTER

Changes or corrections have been made to this service manual. Update your service manual by replacing
the pages listed in the table below with the ones attached to this change notice.

CHANGES EFFECTIVE [DATE]

REMOVE

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your current manual

Revision 1 ALL Revision 2 ALL

Revision 2 pages:13,15,17,20,22,27,29 and 30 Revision 3 pages:13,15,17,20,22,27,29 and 30

the following revised pages

attached to this notice

INSERT

SERVICE MANUAL REVISION HISTORY

Release Part Number Date Code

Original 25A1043 RI
Revision 1 25B1043 SB
Revision 2 25C1043 TB
Revision 3 25C1043 TK

E1999, Shure Incorporated

Printed in U.S.A.

UC1 / UC1L Body-Pack Transmitter

Characteristics

General

The Shure UC1/UC1L Body-Pack Transmitter is microprocessor­controlled, operating in the 692–716 MHz and 774–862 MHz frequency
ranges. The UC1/ UC1L is used in mid-level installed sound, rental, and
concert sound applications. Six frequency range variations are available.

Controls and Connectors

4

3

2

1

Service Manual

25C1043 (TK)

11

1. Antenna

2. Power/Battery Fuel Gauge LEDs

3. Power ON/OFF Switch

4. Input Connector

5. Rf/Audio Mute Switch Input Connector

6. Input Attenuation Control
Figure 1. UC1 Controls and Connectors

Service Note: Shure recommends that all service procedures be performed by a Factory­Authorized Service Center or that the product be returned directly to Shure Brothers Inc.

Licensing: Operation may require a user license. Frequency or power-output modifications
may violate this product’s approvals. Contact your country’s communications authorities.

8

10

9

7

12

7. Audio Gain Control

8. Group Rotary Switch

9. Channel Rotary Switch

10. Battery Compartment

11. Battery Cover Release Tabs

12. Battery Compartment Cover

5

6

E2000, Shure Incorporated Printed in U.S.A.

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Circuit Description

LIMITER CONTROL INPUT

MIC. /

INSTR.

FROM
BATT.

REMOTE

MUTE

ON / OFF

SWITCH

FET

BYPASS

MIC. /

INSTR.

+5V

REG.

OFF / MUTE DETECT

+5v

UNREG. PWR.

PLL CONTROL

LIMITER

CONTROL OUTPUT

TONE KEY

CIRCUIT

TONE CONTROL

MCU

TONE KEY

BATTERY

MGMT.
& FUEL

GAUGE

Σ

CALL ID

EEPROM

(MEM)

AUDIO

OUT

CONTROL

PWR.

HOLD

CIRCUIT

Audio Section

Domestic Models

SYNTH.

GROUP CHANNEL

RF POWER

AUDIO IN

VCO

RF MUTE RF MUTE

Figure 2. UC1 Circuit Block Diagram

The audio signal enters the audio board at J204, pin 1. The signal
then enters a switchable 20 dB pad made up of SW203, R203, R204,
C204, and C206. The back-to-back diodes, U206, are used to keep
the op-amp from snapping to the rail and reverse-phasing when the
maximum input voltage range is exceeded.

Circuit Description

The signal is ac-coupled through C205 into a 40 dB (30 dB for
J frequencies) user-adjustable gain stage around amplifier U2. This
gain stage is externally accessible to the user. Due to its topology, it is
a unique stage because it is non-inverting and allows for a gain less than
unity. Resistors R205 and R207 set up a half-supply bias, and R206 sets
the ac input impedance.

The amplified audio signal then passes through a pre-emphasis
network before entering the compression stage. R221, R222, C215,
and C216 set up two corners for the pre-emphasis network. The pre­emphasis network feeds the NE575 compander, U203, which utilizes

2

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

an external amplifier, U202B. U203 performs a 2:1 logarithmic compres­sion of the audio signal.

Transistors Q201 and Q202, with crystal Y201, form the tone key
oscillator circuit that provides a stable, continuous 32.768 kHz sine
wave. Q204 buffers the tone key signal before it is added to the audio
signal. The tone key signal is used in the receiver to provide audio out­put only when the tone key signal is present in the transmitted signal.
If the tone key or the transmitter is turned off, the receiver is muted.

Q211 acts as a switch for toggling the tone key ON/OFF. It is con-
trolled from the microprocessor, via the TONEMUTE0 signal. The tone
key signal, along with the processed audio signal, is then fed to a sum­ming amplifier, U201A. After passing through the ac coupling capacitor,
C240, the signal is then fed to the rf module.

The battery meter circuit is comprised of comparator U208 and

LEDs D201, D202, D203, and various resistors. When the battery circuit

is less than 6.5 Vdc, the output of U208, pin 13, changes low, the red

LED illuminates, and the tone-key level increases. The receiver then

utilizes the amplitude of the tone-key to indicate that the transmitter
battery is low.

ETSI Models

Rf Section

A 9 Vdc battery provides power to the audio printed circuit board
(pcb) through switch SW202.
battery protection. 9 Vdc enters U205, a low-dropout 5 Vdc regulator,
and gives a clean regulated 5 Vdc supply to run the audio circuitry.

This transmitter uses the same board as the non-ETSI system,
except that it requires a different topology and different parts.

A limiter is inserted between the pre-emphasis and the compressor
to limit the occupied bandwidth. The buffer after the gain stage, U201A,
is now an inverter with pre-emphasis and 20 dB of attenuation.

Previously bypassed, the expander side of U203 is now activated
and used as a limiter. A sample of the audio is taken from the limiter
output (U203, pin 6) and sent to a control circuit which detects signals
from a limiting threshold.

The comparator then sends a control signal to U202, pin 5, which
clamps the signal.

Processed audio enters R149, an internal potentiometer that is
adjusted for 45 kHz deviation (100% modulation for UA, MA, and MB
frequencies), with a –7.2 dBV (0.355 Vrms) 1 kHz tone at the output
of the front audio stage (U201, pin 1). For KK frequencies, R243 is
adjusted for 40 kHz deviation. For JB frequencies, R149 is adjusted for
5 kHz deviation with –63.2 dBV, 1 kHz tone at the input to the transmitter.

FET Q217 provides electrical reverse

25C1043 (TK)

3 Circuit Description

Shure UC1 Body-Pack UHF Transmitter

The audio is then fed to the tuning voltage pin of the voltage-

controlled oscillator (

VCO) and modulates the carrier directly.

Using a phase-locked loop (

PLL) frequency synthesized system

eliminates the need for multiplier stages and results in a much higher
degree of spectral purity. The

VCO is shielded to prevent external rf

fields from affecting its operation.

Regulated 5 Vdc power is provided to ensure frequency stability with

changes in battery voltage.

VCO can tune from 782 MHz to 810 MHz with a 1 Vdc to 4 Vdc

The
tuning voltage range; different VCOs are required for MB and KK frequen-
cy models. At the output of the

The output of the

VCO is coupled by C134 to the frequency control

VCO, the rf signal splits into two paths.

pin of the synthesizer, U104, pin 8. The internal circuitry of the synthe­sizer divides the signal, as necessary, to the desired reference frequency
of 125 kHz. The synthesizer contains a reference oscillator circuit oper­ating from a 4.0 MHz quartz crystal, Y101, that is adjusted by trimmer
C123. The transmitter output frequency is user-selectable in 125 kHz
increments, from 782 MHz to 806 MHz. Frequency range and increment
size vary for each model.

Frequency selection is made via microprocessor U101, which inter­faces the user by means of the mode/select switches. The output of the
synthesizer is a series of pulses which are integrated by a passive loop
filter, R121, C130, R122, C129, C130, R123, and C132, to produce a
control voltage signal. The control voltage signal is then connected to

VCO through amplifier U106A, which is used to isolate the PLL filter

the
from the audio modulation signals.

The

VCO output is also coupled to an rf power amplifier through a

resistive pad consisting of R127, R128, R129, and R130. The signal is
then low-pass filtered through U107. The signal is coupled through C144.

Transistor Q102 acts as an rf pre-amplifier stage with typically 8 dB
of gain. R131, R132, and R133 provide dc bias to Q102. C145, C146,
C147, C149, C150, and L111 are used to decouple the rf off the emitter
of Q102, Vcc, and +9 Vdc supply voltages.

C152 couples the output of Q102 to low-pass filter U108. The signal
is then low-pass filtered through U108, and then coupled through C157.

Q104 acts as an rf amplifier stage with typically 16 dB of gain. L110,
R136, R137, and R138 provide dc bias to Q102. C160, C161, C162,
C163, C164, C165, and L114 are used to decouple the rf off the emitter
of Q104, Vcc, and +9 Vdc supply voltages.

L115 and C167 match the output of Q104 to low-pass filter U109.
The signal is coupled through C173 to the output antenna, W101.

The transmitter can deliver a maximum of +17 dBm (50 mW) to
the 50Ω antenna. During transmitter power-up and frequency selection,
the rf power is muted by bringing the gate of Q103 and Q105 high. The

RFUNMUTE signal is 5 Vdc. This provides approximately 45 dB rf attenu-

ation until the PLL has locked.

Circuit Description

4

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

The transmitter is unmuted by bringing the gate low (
During transmitter power OFF conditions, the rf power is first muted by
bringing the base of Q103 and Q105 high. When the rf is muted this
way, the carrier signal of the transmitter is not allowed to drift off
frequency during power

When the external mute switch is closed, the ring and sleeve on the
jack are connected, or the tip and sleeve can be connected, depending
on how the switch is wired.

If the tip is connected to the sleeve, this grounds the IRQ signal
line that is connected to the microprocessor. Then, the 33 kHz tone key
signal is muted (
bringing the base of Q103 and Q104 high (RFMUTE1). Finally, the rf
power is then turned off via the
the Vcc line to the VCO and the last rf amps.

If the ring is connected to the sleeve, this grounds the

TKMUTE1 grounds Q4 at the output of the tone key oscillator circuit.

The
This mutes the audio signal immediately.

Transmitter Display Board

RFUNMUTE).

ON or OFF conditions.

TONEMUTE1). The transmitter rf power is muted by

RFOFF1 signal. This is done by reducing

TKMUTE1.

UHF Body-Pack Transmitter Digital Section

The digital section contains several circuitry blocks.

Microcontroller Section

The microcontroller section consists of a U101 microcontroller. The
rotary switches indicate the UHF frequency group and channel. A 4.000
MHz oscillator provides the operating frequency to the microcontroller.
The oscillator circuit includes C117, C118, and Y102. U103, R106, and
C120 form the reset circuit. U103 is the reset IC that resets the U101
microcontroller if the 5 Vdc normal operating voltage falls below 4.3 Vdc.
R115 and C119 form the power supply filter circuit.

Memory Section

The memory section consists of U102, a non-volatile Electrically
Erasable / Programmable Read Only Memory (
mapping of compatible groups and channels. The microcontroller serially
communicates with this part via data and clock lines to read the frequen­cy corresponding to the group and channel position. Ability to write to
this memory occurs during factory programming only.

During normal usage, this memory is used as a look-up table only.
Additional detail about the contents of
ing sections.

EEPROM is covered in the follow-

EEPROM) that stores the

25C1043 (TK)

R103 and R108 resistors allow the clock and data lines to be driven
independently of the microcontroller port pin states during in-circuit
programming of

EEPROM.

5 Circuit Description

Shure UC1 Body-Pack UHF Transmitter

Battery Management Section

The microcontroller provides for low battery shutdown. The shut­down threshold is 1.88 Vdc ± 10%. A voltage lower than the shutdown
threshold on pin 17 of the U101 microcontroller shuts down the transmit­ter. Resistors R104 and R105 divide down the battery voltage for the
microcontroller. A battery voltage of less than 5.65 Vdc shuts down the
transmitter.

This auto shutdown disables the audio tone key mix, mutes the rf
power output, and power downs the rf output amplifier section. The cur­rent draw from a 9 Vdc battery in this state is 45 mA, and the battery fuel
gauge is functional. Turning off the power switch must completely shut
off the transmitter.

The audio circuit description provided the battery fuel gauge circuit
description.

Rotary Switches for Frequency Selection

A 10-position Group switch, S101, and a 16-position Channel switch,
S102, select the transmitter frequency. Both rotary switches share the
same U101 microcontroller port pins, 3 through 6, for a multiplexed
switch read operation.

Pins 7 and 8 of the U101 microcontroller select the individual
switches. Resistors R109 through R112 are the pull-ups for the switch
position read. Diode packs D101 through D104 isolate the switches dur­ing a multiplexed read operation.

The multiplexed switch read system does not allow switch change
detection based on interrupts. Also, the switches cannot be constantly
scanned to determine changes, because the scanning frequency being
in audio range is difficult to filter out.

In a steady state, the switch selector common pins are inputs to the
U101 microcontroller pins 7 and 8. Pins 3 through 6 are outputs. In this
state, pins 4, 5, and 6 are held low, while pin 3 is held high. This forces a
logic high level on the switch selector pins if the switches are set on odd
positions. If the switches are set on even positions, the contact on pin 1
is open from the switch common pin, and the pull-down resistors, R114
and R115, force the logic low to pins 7 and 8 of U101.

Any switch change is made by a state toggle from odd to even, or
vice versa. Only this change can be detected and is followed by a multi­plexed switch read. In this case, U101 pins 7 and 8 become selectively
grounded outputs to read the selected switch’s state on pins 3 through 6.

A multiplexed switch read is preceded by tone key and rf mutes.
This mutes the audio in the receiver to allow a quiet change to another
frequency.

Circuit Description

6

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Power Switch and Remote Mute Switch Interface

When a transmitter is turned off, the
on U101, pin 19. The same signal is also forced low when a remote
mute switch closes the tip contact to the sleeve ground.

The microcontroller treats both of these events in a similar manner.
It immediately disables the tone key, and the power hold circuit auto­matically kicks in to bypass the power switch. Followed by 500 msec.
of delay, the rf is muted and also turned off.

The power hold circuit is also disabled at this point. If it is the power
off condition, then the transmitter is shut off. Otherwise, it is the remote
mute condition, and the transmitter waits here for unmute to occur.

PWRDN1 is pulled up back to logic high level when unmute occurs.

The rf section repowers and is unmuted, followed by tone key enable
to completely recover from the remote mute condition. When a remote
mute switch closes the ring contact to the sleeve ground, the
signal goes to a logic low that immediately mutes the audio.

PWRDN1 signal goes to logic low

TKMUTE1

25C1043 (TK)

7 Circuit Description

Shure UC1 Body-Pack UHF Transmitter

Notes

Circuit Description

This page intentionally left blank.

8

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Functional Test

Verify operation and reported malfunction, referring to the product
User Guide for a description of the unit as well as information on its
operation, troubleshooting, and technical data.

Disassembly and Assembly

! CAUTION !

Observe precautions when handling this static-sensitive device.

Disassembly

1. Open the battery compartment and remove the battery.

2. Remove the belt clip.

3. With the battery compartment open, remove the four screws
from the back of the case.

4. Lift the top half of the transmitter case away to expose the
printed circuit boards (pcbs).

5. Lift the pcbs out of the transmitter case.

Figure 3. UC1 Disassembly

25C1043 (TK)

9 Disassembly

Shure UC1 Body-Pack UHF Transmitter

Reassembly

After completing all repairs and alignment, reassemble the UC1:

1. Place the printed circuit boards back into the case, making sure
the multi-pin connectors on the board mate and the

LEMO

connector is seated correctly.

2. Reassemble the transmitter by performing the disassembly steps
in reverse order.

TINI QG/

Reassembly

10

25C1043 (TK)

Service Procedures

Measurement Reference

dBu is a measure of voltage, and dBm is a measure of power.

For example, the HP8903 should be labeled dBu instead of dBm
because it is a voltage measurement. These two terms are often used
interchangeably even though they have different meanings.

Audio levels in dBu are marked as dBm on the HP8903.

0 dBV = 2.2 dBu

0 dBu = 0 dBm, assuming the load = 600 Ω

Test Equipment

Most test equipment needed is described in the Shure Wireless
Service Equipment Manual. The following test equipment (or approved

equivalent) is also needed.

Shure UC1 Body-Pack UHF Transmitter

dB Conversion Chart

Equipment Type Model

Audio analyzer *Hewlett-Packard 8903B

Digital multimeter Fluke 87

PCB interconnect cable PT1843

Japan Version Test Cable PT–1838–AF

Japan Version Test Connector PT–1838–AJ

Frequency counter Hewlett-Packard 53181A
Rf signal generator Hewlett-Packard 8656B
Spectrum analyzer Hewlett-Packard 8590L

Shure UC4 receiver Shure UC4

BNC(male) to unterminated

50W test cable

*Audio levels in dBu are marked as dBm on the HP8903B.

Test Equipment Set-Up

The alignment procedure is sequential and does not change,

unless specified.

Table 1

Test Equipment

PT–1824

25C1043 (TK)

1. Use PT1824 cable for all RF connections. except for the Japan
frequencies, use PT1838–AF/AJ test adapter / cable.

2. Keep the test cables as short as possible (less than 12 inches).

11 Test Equipment Set-Up

Shure UC1 Body-Pack UHF Transmitter

3. Include the insertion loss of the cables and the connectors
for all rf measurements.

4. Dc voltages are present at most rf test points. Use dc blocks
to protect the test equipment, if necessary.

Test Set-Up

C123

TP131

C130

TP5

SIDE 1

Q3

TP

MIC1

Q2

D206

TBIAS1

U1

J204

*R144

U108

Q104

L115

*J103

TP107

W101

*R144 and J103 are for JA, JB frequencies only.

J301

TP3

SW202

D203

D202

D201

C220

TP

TP4

Y201

TP106

GND

AUD1

PAD

C225

C255

TP102

TP110

Y103

C223

TP2

GND1

TP

TP239

VCO

C257

C256

TP103

TBIAS1

C219

Q4

C240

C510

U501

TP111

U701

C119

CA

TP1

TPA1

TP18

TP9
TP21

TP14

TP10

TP130

TP120

+ 5V

B

TPMIC1

F

D

GE

H

TP+5

TP13

TP19

TP12

TP6

+ 9V

R149

TP104

+ 9V

GREEN

J202

SW203

C206

R7

U205

J201

TP8

Q213

S102

S101

RED

+ 9 Vdc

Q217

TP108

TP109

TP17
TP16

TP7

J203

TP16

SIDE 2

TP108

TP109

TP7

TP17

L208

C208

C203

STR1

C246

TP8

Q218

J101

D104

L205

TP6

D102

TP13

TP19

D103D101

TP111

+ 9V

TP+5

TP12

TP10

Q220

D105

TP104

U2

TP9

Q215

U106

+ 5V

TP18

Q216

U208

+ 9V

TP130

TP5

Q101

C176

U103

TP120

TP1

TPA1

Q223

Y102

4.000

TP14

J202

TP21

TP239

TP103

TP2

TP

Q201

U107

U203

TP

GND1

Q202

U104

TP102

TP3

U201

AUD1

4.000
Y101

TP110

TP106

U102

Q204

TP107

Q222

TP4

J401

Q103

C176

Q221

B

A

D

F

EG

H

Q105

U109

W101
PAD

Q219

Q1

C

Test Set-Up

Figure 4. UC1 Major Test Component Locations

1. Remove the U1 antennas.

2. The attenuator switch (SW203) must be in the 0 dB position.

3. Use the PT1843 cable to connect the RF-digital board and the
audio board through the 11-pin board interconnects (J101, J201,
side 2).

4. Apply +9 Vdc across the battery terminals (J202, J203, side 1).

5. Set audio GAIN potentiometer (R7, side 2) to minimum
(full counter-clockwise ).

12

25C1043 (TK)

Alignment

Alignment Set-Up

Shure UC1 Body-Pack UHF Transmitter

6. Rf power and tone key level measurements are made by
connecting W101 (rf output) to the spectrum analyzer. Use
the frequency counter to measure frequency. For JA, JB
frequencies, connect J103 (rf output) to the spectrum analyzer
and frequency counter.

7. See Table 2 for frequency settings.

Table 2 lists the group carrier frequencies and
tuning voltages for all the service tests that follow.

Table 2

Group Carrier Frequencies and Tuning Voltages

(in order by carrier frequency)

Group

Group

Group

Code

Switch

(S101)

UA A 4 0 805.500 3.7 45

UB F 1 A 703.750 2.6 45
MB B 1 3 805.500 2.2 15
MC G 1 1 774.125 1.3 ±0.2 15
MD B 3 7 805.500 2.2 15

JA C 0 2 805.500 3.7 5
JB D 4 2 807.500 3.8 5

KK E 5 5 851.125 2.9 15

Channel

Switch

(S102)

Carrier

Frequency

(MHz)

VCO Tuning

Voltage
(TP130)

Deviation

(kHz)

25C1043 (TK)

13 Alignment

Shure UC1 Body-Pack UHF Transmitter

Frequency

Use this service procedure to correctly align the transmitter’s
operating (output) frequency. C510 tunes the voltage-controlled
oscillator (VCO) to the operating frequency selected, with a 1 – 4 Vdc
tuning range.

C123 adjusts the reference oscillator on the synthesizer.

SIDE 1

C123

TP130

VCO

*J103

GND

U501

C510

R149

Connect – : J202 (ground)

*R144

FREQUENCY COUNTER

CH 2

CH 1

W101

*R144 and J103 are for JA, JB frequencies only.

UC1 Transmitter Frequency Counter

Power: ON Operating freq: See Table 2 Connect + : TP130

Operating freq: See Table 2 Connect CH 2: W101 and GND

For JA, JB use J103

Input attenuation: 0dB Measurement: DC level

Gain: Minimum

Channel switch: See Table 2

Group switch: See Table 2

AUDIO ANALYZER

S102

(GREEN)

S101

(RED)

J202

Audio Analyzer

J201

Alignment

Figure 5. UC1 Frequency Alignment Test Set-Up

1. Remove the antenna and connect the RF test cable, center
conductor to W101, and shield to GND, as shown in Figure 5.
(For Japan models, use J103 with the PT–1838–AF and the
PT–1838–AJ test cable/adapter.)

2. Measure the dc voltage at TP130 (tuning voltage line) and
ground (GND).

3. Use the pink torey to adjust the VCO trimmer, C510, until the
voltmeter reading equals that shown in Table 2, ± 0.125V..

4. Connect the BNC cable end to the frequency counter, CH 2.

5. Use the blue torey to adjust the variable capacitor, C123, until
the frequency counter measurement matches the desired
frequency, within ± 1 kHz.

6. Disconnect the test cable from the frequency counter.

7. Use the test set-up and equipment settings in Figure 6 for
the next test, the power output measurement.

14

25C1043 (TK)

Power Output Measurement

The output power measurement ensures that the output signal is
strong enough for sufficient range when the system is in use. The output
power measurement also verifies that the output power is not above the
specified maximum level, to ensure compliance with regulatory agencies’
standards.

Shure UC1 Body-Pack UHF Transmitter

SPECTRUM ANALYZER

UC1 Transmitter Spectrum Analyzer

Power: ON Frequency: See Table 2 Connect + : TP130

Operating freq: See Table 2 Span: 200 KHz Connect – : J202 (ground)

Input antennuator: 0dB Reference voltage: 20 dBm Measurement: DC level

Gain: Minimum Peak search: ON

Channel switch: See Table 2 Signal track: ON

Group switch: See Table 2 Marker: ON

SIDE 1

C123

TP130

*R144

VCO

*J103

W101

*R144 and J103 are for JA, JB frequencies only.

C510

U501

GND

AUDIO ANALYZER

R149

S102

(GREEN)

S101

(RED)

J202

Audio Analyzer

J201

25C1043 (TK)

Figure 6. UC1 Power Output Measurement Test Set-Up

1. Remove the BNC cable end from the frequency counter and
connect it to the 50 Ω input of the spectrum analyzer. Use the
equipment settings shown in Figure 6.

2. Measure the output power. The output power should be:

UA, UB, MB, MC,MD

12 + 1 / – 2 dBm

frequencies:

KK frequencies: 12 + 1 / – 2 dBm

JA, JB frequencies: Adjust R144 to obtain

8.8 ± 0.5 dBm.

3. Turn the UC1 power OFF.

4. Remove the BNC end of the cable from the spectrum analyzer,
but leave the bare end soldered to the printed circuit board (pcb).
(For Japan models, leave the adapter cable connected to J103.)

15 Alignment

Shure UC1 Body-Pack UHF Transmitter

Deviation

Deviation must be set to make sure the companding systems be­tween the transmitter and receiver correctly track each other. The level
coming out of the transmitter’s audio compressor must match the level
going into the receiver’s audio expander. A fixed gain structure does not
ensure an exact match, primarily because of variations in voltage­controlled oscillators (VCOs).

Two options for setting deviation are offered below.

Option 1: Using a UC4 or U4S Receiver

This test requires a UC4 or U4S receiver and is designed to tune the
transmitter regardless of the accuracy of the receiver’s tuning. However,
it is recommended that a properly-tuned receiver be used to perform the
transmitter deviation adjustment.

Be sure to use a KK model receiver when tuning a KK model transmitter.

Reference Voltage

1. See Figure 7 for equipment test set-up and equipment settings.

2. Connect the rf signal generator output to the UC4 receiver
antenna input (A or B).

3. Remove the UC4 cover and set the tone key switch (S501) to the
OFF position to disable the tone key function.

4. Turn the UC4 receiver on.

5. Connect the audio voltmeter to the receiver’s unbalanced output.

6. Measure the output voltage (typically 1.525 V

Record this voltage. This is the deviation reference voltage.

7. Turn OFF RF output

UC4 RECEIVER (BACK)

SQUELCH

rms

UC4 RECEIVER (FRONT)

AB

)

AUDIO ANALYZER

DC BLOCK

RF SIGNAL GENERATOR

NOTE: DC VOLTAGES ARE PRESENT AT MOST
RF TEST POINTS. USE A DC BLOCK ON THE
RF SIGNAL GENERATOR TO PROTECT
TEST EQUIPMENT.

UC4 Receiver Audio Analyzer Rf Signal Generator

Output: Unbalanced Measurement: AC level INT: FM

Gain: Maximum Filters: INT: 1 kHz

Squelch: Mid Low-Pass (30 kHz): ON Output Amplitude: –60 dBm

Tone Key (S501): OFF High-Pass (400 Hz): ON Frequency: See Table 2

Operating freq: See Table 2 Deviation: See Table 2

Figure 7. Deviation Reference Voltage Test Set-Up,

Using a UC4 or U4S Receiver

Alignment

16

25C1043 (TK)

S501

(TONE KEY SWITCH)

TK ON TK OFF

Adjustment Voltage

1. Disconnect the rf signal generator from the UC4 receiver.
Make sure the tone key switch (S501) is in the ON position.

2. Use the BNC to TINI QG cable to connect the audio analyzer
output to the MIC input of the transmitter (J301).

3. Set the audio analyzer to 1 kHz.

4. Turn the UC1 power back ON.

5. Adjust the audio analyzer output level (typically = –2.2 dBu) to
get the following readings at TP3, ± 0.02 dB:

UA, UB MB, MC,MD JA, JB KK

–6.8 dBu – 16.3 dBu – 23.47 dBu – 15.3 dBu

6. See Figure 9 for equipment set-up and equipment settings for
steps 7 through 8.

AUDIO ANALYZER

Shure UC1 Body-Pack UHF Transmitter

Model:

J301

UC1, SIDE 2

TP3

R149

UC1, SIDE 1

UC1 Transmitter Audio Analyzer

Power: +9 Vdc Measurement: AC level

Gain: Minimum Output: 1 kHz

Input antennuator: 0dB Filters:

Channel switch: See Table 2 Low-Pass (30 kHz): ON

Group switch: See Table 2 High-Pass (400 Hz): ON

Figure 8. Deviation Adjustment Voltage Test Set-Up,

Steps 1 through 4, Using a UC4 or U4S Receiver

25C1043 (TK)

17 Alignment

Shure UC1 Body-Pack UHF Transmitter

7. Connect the BNC end of the test cable that is soldered to W101
and GND to the antenna A or B inputs.

8. Turn ON the UC1 and adjust R149 until the audio volt-meter
connected to the unbalanced output of the UC4 reads the same
as the deviation reference voltage, measured above, ± 0.1 dB.

R149 adjusts the deviation for 45 kHz, 100% modulation.

AUDIO ANALYZER

S501

(TONE KEY SWITCH)

R149

W101

GND

UC4 Receiver UC1 Transmitter Audio Analyzer

Output: Unbalanced Power: + 9 Vdc Measurement: AC level

Gain: Maximum Gain: Minimum Output: 1 kHz

Squelch: Mid Input antennuator: 0dB Filters:

Tone key (S501): ON Channel switch: See Table 2 Low-Pass (30 kHz): ON

Group switch: See Table 2 High-Pass (400 Hz): ON

UC1, SIDE 1

Figure 9. Deviation Adjustment Voltage Test Set-Up,

Steps 7 through 8, Using a UC4 or U4S Receiver

Alignment

18

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Option 2: Using a Modified SC4 IF Receiver

Deviation tests can also be performed using a modified SC4 IF
receiver. For instructions on modifying an SC4 receiver, consult the
Shure Service Equipment manual.

Reference Voltage

1. See Figure 10 for equipment test set-up and equipment settings.

2. Connect the rf signal generator output to the input port L (local
oscillator) of a Zad-1 mixer

3. Connect the output port I (intermediate frequency) of the Zad–1
mixer to antenna input B of the SC4 IF receiver.

4. Turn the SC4 IF receiver ON and set the tone key switch on the
front panel of the SC4 IF receiver to OFF.

5. Connect the audio voltmeter to the receiver’s unbalanced output.

6. Measure the output voltage.

Record this voltage. This is the deviation reference voltage.

Use the same Zad-1 mixer connections for the next adjustment test.

ZAD–1 MIXER

R

NOTE: DC VOLTAGES ARE
PRESENT AT MOST RF TEST
POINTS. USE A DC BLOCK
ON THE RF SIGNAL GENERATOR
TO PROTECT TEST EQUIPMENT.

I

L

DC BLOCK

RF SIGNAL GENERATOR

ANTENNA INPUT B

SC4 IF Receiver Audio Analyzer Rf Signal Generator

Output: Unbalanced Measurement: AC level INT: FM

Gain: Maximum Filters: INT: 1 kHz

Squelch: Mid Low-Pass (30 kHz): ON Output Amplitude: + 7 dBm

Tone Key switch: OFF High-Pass (400 Hz): ON Frequency: 10.7 MHz

Operating freq: See Table 2 Deviation: See Table 2

MODIFIED SC4 IF RECEIVER

TONE KEY SWITCH: OFF

AUDIO ANALYZER

AUDIO OUT

25C1043 (TK)

Figure 10. Deviation Reference Voltage Test Set-Up,

Using a Modified SC4 IF Receiver

19 Alignment

Shure UC1 Body-Pack UHF Transmitter

Adjustment Voltage

1. Disconnect the SC4 audio output from the audio analyzer input.

2. Use the BNC to TINI QG cable to connect the audio analyzer
output to the MIC input of the transmitter (J301).

3. Set the audio analyzer frequency to 1 kHz.

4. Turn the UC1 power back ON.

5. Connect the sheild probe test cable to the audio analyzer input.

6. Adjust the audio analyzer output level (typically = –2.2 dBu) until
the following readings are read at TP3, ± 0.02 dB:

UA, UB MB,MC,MD JA, JB KK

–6.8 dBu – 16.3 dBu – 23.47 dBu – 15.3 dBu

See Figure 12 for equipment set-up and settings for steps 7 through 9.

AUDIO ANALYZER

Model:

J301

UC1, SIDE 2

TP3

R149

UC1, SIDE 1

UC1 Transmitter Audio Analyzer

Power: +9 Vdc Measurement: AC level

Gain: Minimum Output: 1 kHz

Input antennuator: 0 Filters:

Channel switch: See Table 2 Low-Pass (30 kHz): ON

Group switch: See Table 2 High-Pass (400 Hz): ON

Figure 11. Deviation Adjustment Voltage Test Set-Up,

Using a Modified SC4 IF Receiver

Alignment

20

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

7. Connect the UC1 rf output test cable BNC end to the input port R
(rf output) of the Zad-1 mixer.

8. Set the rf signal generator to the frequency given in Table 2, mi­nus 10.7 MHz (Carrier Frequency (MHz) –10.7 MHz).

9. Set the SC4 tone key switch on the SC4 front panel to ON.

10. Connect the SC4 IF receiver’s unbalanced output to the audio
analyzer input, disconnecting the shield probe.

11. Turn ON the UC1 and adjust R149 until the audio analyzer
connected to the unbalanced output of the UC4 reads the same
as the deviation reference voltage, measured above, ± 0.1 dB.

TRANSMITTER

AUDIO

IN

NOTE: DC VOLTAGES ARE
PRESENT AT MOST RF TEST
POINTS. USE A DC BLOCK
ON THE RF SIGNAL GENERATOR
TO PROTECT TEST EQUIPMENT.

Tone Key switch: ON Change switch: See Table 2 Low-Pass

ANTENNA

OUTPUT

SC4 IF Receiver UC1 Transmitter Audio Analyzer Rf Signal Generator

Output: Unbalanced Power: + 9 Vdc Measurement: AC level INT: FM

Gain: Maximum Gain: Minimum Output: 1 kHz INT: 1 kHz

Squelch: Mid Input attenuator: 0dB Filters: Output amplitude: + 7 dBm

ZAD–1 MIXER

R
I

L

DC BLOCK

RF SIGNAL GENERATOR

Group switch: See Table 2 High-Pass

ANTENNA INPUT B

30 kHz:

400 Hz:

MODIFIED SC4 IF RECEIVER

TONE KEY SWITCH: ON

AUDIO ANALYZER

ON Deviation: See Table 2

ON Frequency: Oper. Freq.

Figure 12. Deviation Adjustment Voltage Test Set-Up,

Steps 7 through 9, Using a Modified SC4 IF Receiver

(unbalanced)

AUDIO OUT

minus 10.7 MHz

25C1043 (TK)

21 Alignment

Shure UC1 Body-Pack UHF Transmitter

Operating Specifications

After tuning, the unit should meet the following specifications.

Specification Minimum Typical Maximum

Current drain 50 mA 60 mA 70 mA

Frequency –1.0 kHz See Table 2 +1.0 kHz
Audio freq response @ 100 Hz wrt 1 k –5.0 dB –4.0 dB –3.0 dB
Audio freq response @ 10 kHz wrt 1 k +8.0 dB +9.0 dB +10.0 dB

UA, UB:

System S/N @ 45 kHz, A weighted 95.0 dB 100.0 dB –
Output power, UA, without C347 12.0 dBm 14.0 dBm 15.0 dBm

MB, MC, MD

System S/N @ 1% THD, A weighted 80.0 dB 85.0 dB –
Output power, without C347 12.0 dBm 14.0 dBm 15.0 dBm

KK:

System S/N @ 1% THD, A weighted 80.0 dB 85.0 dB –
Output power, without C347 12.0 dBm 14.0 dBm 15.0 dBm

JA, JB:

System S/N @ 1% THD, A weighted 85.0 dB 90.0 dB –
Output power, at J2, with C347 in place 8.3 dBm 8.8 dBm 9.3 dBm

Table 3

Operating Specifications

Operating Specifications

22

25C1043 (TK)

Bench Checks

Dc Problems

Make all dc measurements with respect to the rf ground,

unless otherwise specified.

n Verify that the battery voltage is between 6.0 Vdc and 9.5 Vdc.
n Check for +5 Vdc at labeled test points on the audio and rf

boards.

n If incorrect voltage is present, check the biasing resistors’ values.
n Trace the dc back to the battery and check the power switch.
n Look for open coils, cracked parts, reversed polarity capacitors,

and solder shorts.

n If there is a short to ground from 5 Vdc, try to isolate different

parts of the circuit.

Shure UC1 Body-Pack UHF Transmitter

n Verify that the rf

and power down to 0 Vdc during normal operation. Trace the
signal to the microprocessor. Q101 should be saturated during
normal operation.

n Verify that the battery voltage appears at U205, pin 6,

(TP +9 Vdc).

Rf Frequency Problems

n If the carrier is out of specification by less than 40 kHz and can-

not be corrected by adjusting C123, check the values of C123,
C124, and Y101. If these values are correct, replace Y101. As
a last resort, replace the synthesizer, U104.

n If the carrier frequency is not 782 and 810 MHz, or is unstable,

the loop is unlocked:

Check solder connections at the VCO, microprocessor (traces
LE, D, and CK) and synthesizer, U104.

Check for 4 MHz oscillation at U104, pins 1 and 2. If there is not
4 MHz oscillation, replace the crystal, Y104.

Check the values and polarity of the loop filter: R121, R122,
R123, C129, C130, C131, and C132. Check the bias voltage of
U104, pins 3 and 4; and U106, pin 8. As a last resort, replace
the synthesizer, U104.

OFF signal changes from +5 Vdc at power up

25C1043 (TK)

The tuning voltage of the VCO at U104, pin 5, should be approxi­mately 3 Vdc when the transmitter is programmed for 800 MHz
operation.

23 Operating Specifications

Shure UC1 Body-Pack UHF Transmitter

Low Rf Output Power

n Check the polarity of the low-pass filters U107, U108, and U109.

(Pin 1 is marked with a dash.)

n Check for missing ground connections.
n Verify the VCO output power at R128 and U104, pin 8.
n Check the dc level at the VCO Vcc pin.
n Isolate the VCO from the rest of the circuit by removing R127,

R128, and C134. The carrier frequency will no longer be locked,
but the output power from the VCO should be approximately
0 dBm.

n If the power out of the VCO is still low, the VCO is bad.

Replace the rf board.

n Verify the dc bias of Q102 and Q104. Verify the rf mute signal

changes from +5 Vdc at power up and power down, to 0 Vdc
during normal operation. If Q103 and Q105 are not saturated
during normal operation, the rf power at the antenna port will be
attenuated by about 45 dB.

n Isolate components starting from the antenna port and working

back to the rf power amp.

n Remove the low-pass filter and check the power OUT of the

amplifier.

n Check the values of the output matching network for Q102 and

Q104, C258, L206, and C256. Look for open coils.

n Check the values of the bypass capacitors.
n As a last resort, replace the transistors, Q102 and Q104.

Excessive Current Drain

n Isolate different sections of the circuit; rf, audio, and digital.

Look for reversed polarity capacitors or wrong resistor values.

Deviation Problems

n If R149 cannot be adjusted to obtain the desired deviation, try to

isolate the problem to the audio or rf section.

n Check the value of R149. To check the rf section, set the trans-

mitter frequency to 800 MHz and verify that the tuning voltage of
the VCO (U104, pin 5) is approximately 3 Vdc.

Operating Specifications

24

25C1043 (TK)

Audio Problems

No Tone Key

Shure UC1 Body-Pack UHF Transmitter

No tone key means that the 32 kHz tone key sidebands are not visible
when the carrier is viewed on a spectrum analyzer. If tone key levels are
there but are too low, the deviation is off and needs to be recalibrated.

n Apply a 1 kHz tone at a level of 0 dBu to the audio input with

the audio gain pot at minimum.

n If the carrier on the spectrum analyzer does not show any

deviation, check part integrity and audio path continuity between
U201, pin 1, and the VCO.

n If the spectrum analyzer shows a deviated carrier, probe for a

32 kHz signal at TP4 and I246 and continue to the next step.

n If there is a signal at I246 but not at TP4, then the mute circuit

through Q4 or Q211 is being activated. Verify that the logic sig­nal at Q4 and Q211, pin 1, is logic low. If it is low, replace Q4 or
Q211. If it is not low, check the line for a short to +5 V. If there is
no short, the microprocessor is defective and must be replaced.

n If there is a 32 kHz signal at both I246 and TP4, replace R248.
n If there is not a 32 kHz signal at either I246 or TP4, there is

something wrong with the tone key circuit or the tone key supply
voltage. If the tone key supply voltage (U201, pin 7) is less than
2 V, there is a problem with one or more of the following com­ponents: R284, R287, R285, R286, C289, Q222, C222. R228.
or R229..

n If the voltage at U201, pin 7, is greater than 2 V, the problem is in

the tone key circuit itself. Check for shorts and opens. Replace
parts in this circuit beginning with the crystal until the 32 kHz
oscillation returns.

No Audio

25C1043 (TK)

n View the carrier on the spectrum analyzer. If there are not

32 kHz tone key sidebands around the carrier, follow the steps
above for “No Tone Key.”

n If there are tone key sidebands around the carrier, verify that the

signal generator is properly outputting signal.

n Verify +9 V, half-supply bias, and ground connections to U2.
n Verify +9 V, half-supply bias, and ground connections to U201.
n Follow the audio path from where audio is applied until the point

of discontinuity is reached and replace the appropriate part.

25 Operating Specifications

Shure UC1 Body-Pack UHF Transmitter

Notes

Operating Specifications

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26

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Replacement Parts and Drawings

Product Changes

Six versions of the UC1 and UC1L transmitters are available for use
in various countries. Each version is identified below by country code,
country designation, frequency range, and printed circuit board number.

Parts Designations

The following comments apply to the parts list and the schematic:

Resistors: Unless otherwise noted, all resistors are surface-mount

1

with

/10 W rating and 1% tolerance.

Capacitors: Unless otherwise noted, non-polarized capacitors are
surface-mount
tolerance, and polarized capacitors are tantalum types.

NPO dielectric types with a 100 V capacity and a 5%

Table 4

UC1 / UC1L Model Frequency Variations

(in order by frequency)

Country

Code

UA U.S.A. and Canada 782 – 806 MHz 90UA8790 90UA8791

UB U.S.A. 692 – 716 MHz 90UB8790 90UB8791
MB Europe 800 – 830 MHz 90MB8790 90MB8791
MC Netherlands 774 – 782 MHz 90MC8790 90MC8791
MD Scandanavia 800 – 820 MHz 90MD8790 90MD8791

JA Japan 797 – 806 MHz 90JA8790 90JA8791

JB Japan 806 – 810 MHz 90JB8790 90JB8791

KK United Kingdom 838 – 862 MHz 90KK8790 90KK8791

Country

Designation

Frequency

Range

UC1 Printed

Circuit Board #

UC1L Printed

Circuit Board #

Table 5

Replacement Parts

Reference

Designation

MP1 Antenna 70A8015
MP2 Belt clip 44A8013A
MP3 Bushing 66A308
MP4 Case back 65A8295A
MP5 Case front 65A8294A
MP6 Compression pad 36A8078
MP7 Door 65A8296
MP8 Foam pad 36A8073

MP9 Case screws and hardware RPW622
MP10 QG mic connector/PCB assembly RPW270
MP11 Lemo mic connector/PCB assembly RPW274

Description

Shure Part

Number

25C1043 (TK)

27 Parts Designations

Shure UC1 Body-Pack UHF Transmitter

Printed Circuit Board Components

Table 6

Reference

Designation

C123 Capacitor, trimmer, 5 – 40 pF 152F03

C510 Capacitor, trimmer, 0.65–2.5 pF 152A04
D101–104 Diode, dual switching, SOT-23 184A07
D105, 206 Diode, signal / switching, SOT-23 184A08

D201 LED, right angle, green 184F32

D202 LED, right angle, yellow 184E32

D203 LED, right angle, SMT, red 184D32

D501 Diode, rf tuning 184A36

J102 Jack, stereo, 35 mm 95A8774
J201 Connector, receptacle, 11 pin 170A08

J202,203 Battery contacts 56A8072A

J204 Connector, strip socket, 3 pin 170C15
J301 Receptacle, male, 4-pin, TINI QG 95A8413
J401 Connector, LEMO (UC1L) 95A8601

P301,305 Connector, interconnect strip 56D8074

Q1,4,211,215,

216,218

Q101,213 Transistor, SOT-23, PNP 183A01
Q102,501,502 Transistor 183A48
Q103,105,217 Transistor, power, MOSFET 183A46

Q104 Transistor, SOT-23 183A49

Q201,202,204,

219,220,221,

222, 223

R7 Potentiometer, gain 46H8014

R149 Audio Deviation Potentiometer, 1k 146B02
SW202 Power Switch, toggle, DPST 55A189
SW203 Attenuator Switch, slide 55A8087

Y101 Crystal, 4 MHz 40A8012

Y201 Crystal, 32.768 kHz 40A8010

U2 IC, dual op amp 188A18
U101 IC, microprocessor, programmed 188D238G
U103 IC, detector 188C210
U104 IC, PLL frequency synthesizer 188A265
U201 IC, quad op amp 188A49
U203 IC, compander 188A126
U205 IC, voltage regulator, 5 V 188A115
U208 IC, quad comparator 188A123
U501 Resonator, dielectric 140A14

Transistor, SOT-23, FET, TMOS 183A30

Description

Transistor, SOT-23, NPN 183A02

Shure Part

Number

Parts Designations

28

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Table 7

U102 EEPROM Programed

Part Numbers

Country

Code

Part Number

UA 188UCT131UA

UB 188UCT131UB
MB 188UCT131MB
MC 188UCT131MC
MD 188UCT131MD

JA 188UCT131JA
JB 188UCT131JB

KK 188UCT131KK

Table 8

Frequency Dependent Components

(in order by frequency)

CODE COUN-

UA US/
UB US 692–716 N/A N/A N/A N/A N/A 145FF1

MB /MDEUROPE

KK EN-

MC NETHER–

TRY

CANADA

SCANDA-

NAVIA

JA JAPAN 797–806 N/A N/A 145FF1
JB JAPAN 806–810 N/A N/A N/A 145FF1

GLAND
LANDS

FREQ

RANGE
782–806 145FF1

800–830
800–820

838–862 N/A N/A N/A N/A 145FF1
774–782 N/A N/A N/A N/A N/A N/A 145FF1

R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36

001

N/A 145FF1

N/A N/A N/A N/A N/A N/A N/A 145FF1

N/A N/A N/A N/A N/A N/A N/A 145FF1

001

001

N/A N/A N/A N/A N/A N/A N/A 145FF1

N/A N/A N/A N/A N/A N/A N/A

001

001

U102

N/A N/A N/A N/A N/A

001

N/A N/A N/A N/A N/A N/A

001

N/A N/A N/A N/A

001

N/A N/A

001

N/A

001

CODE COUN-

UA US/

UB US 692–716 N/A N/A 145FF1

MB /MDEUROPE

JA JAPAN 797–806 N/A N/A N/A N/A 145FF1

JB JAPAN 806–810 145FF1

KK EN-

MC NETHER–

TRY

CANADA

SCANDA-

NAVIA

GLAND

LANDS

FREQ

RANGE
782–806 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

800–830
800–820

838–862 N/A 145FF1

774–782 N/A N/A N/A 145FF1

R37 R38 R39 R40 R1 R11 R12 R13 R14 R15 R16

N/A N/A N/A N/A N/A N/A N/A N/A

001

N/A N/A N/A N/A 145FF1

001

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

001

N/A N/A 145FF1

145FF1

001

002

002

002

002

145FF4

021

145FF4

021

145FF4

021

145FF4

021

145FF4

021

145FF4

021

145FF4

021

145FF4

021

145FF4

022

145FF4

021

145FF4

022

145FF4

022

145FF1

003

145FF1

003

145FF1

003

145FF1

003

145FF1

002

145FF1

002

145FF1

002

145FF1

002

145FF1

004

145FF1

004

145FF1

004

145FF1

004

25C1043 (TK)

29 Parts Designations

Shure UC1 Body-Pack UHF Transmitter

CODE COUN-

UA US/

UB US 692–716 N/A N/A N/A N/A N/A N/A N/A N/A N/A 145FF

MB /MDEUROPE

JA JAPAN 797–806 145FF

JB JAPAN 806–810 N/A N/A N/A N/A N/A N/A N/A N/A N/A 145FF

KK EN-

MC NETHER–

CODE COUNTRY FREQ

MB /MDEUROPE

TRY

CANADA

SCANDA-

NAVIA

GLAND

LANDS

UA US/

CANADA

UB US 692–716 N/A N/A 150GB6

SCANDA-

NAVIA

JA JAPAN 797–806 150GB2

JB JAPAN 806–810 150GB2

KK ENGLAND 838–862 N/A N/A 150GB3

MC NETHER–

LANDS

FREQ

RANGE
782–806 N/A N/A N/A N/A N/A N/A N/A N/A N/A 145FF

800–830
800–820

838–862 145FF

774–782 145FF

782–806 N/A N/A 150GB4

800–830
800–820

774–782 N/A N/A 150GB4

R17 R18 C7 C8 C12 C215 Q2 Q3 U1 R298 R25 R9

145FF

145FF

150GC

150GC

150GB

151AB

183A01183A02188A136N/A N/A N/A

225MA

151AB

183A01183A02188A136N/A N/A N/A

225MA

151AB

183A01183A02188A136N/A N/A N/A

225MA

151AB

183A01183A02188A136N/A N/A N/A

225MA

N/A N/A 140C15 N/A N/A N/A 145FF2

N/A N/A 140C15 N/A N/A N/A 145FF2

N/A N/A 140C15 N/A N/A N/A 145FF2

N/A 40A8012N/A 170A14 146B02 145FF4

N/A 40A8012N/A 170A14 146B02 1455FF

N/A N/A 140C15 N/A N/A N/A 145FF2

RANGE

1004

22R1

473KB

104KB

101JA

145FF

150GC

150GC

1004

22R1

473KB

145FF

22R1

145FF

22R1

150GB2

70JA

150GB2

70JA

150GC
473KB

150GC
473KB

78BA

88BA

78BA

150GB4

78BA

150GB4

78BA

38BA

78BA

1004

1004

C117 C118 C505 C506 C509 C148 Y102 Y103 J103 R144 R145 R133

N/A N/A 150GB4

70JA

70JA

104KB

150GC
104KB

150GC
104KB

150GB

150GB

150GB

150GB4

78BA

150GB6

88BA

150GB4

78BA

150GB4

78BA

150GB4

78BA

150GB3

38BA

150GB4

78BA

101JA

101JA

101JA

150GB1

88BA

150GB4

78BA

150GB1

08BA

150GB1

88BA

150GB1

88BA

N/A N/A N/A 140C15 N/A N/A N/A 145FF2

150GB1

88BA

4021

4021

4021

145FJ000145FJ0

145FJ000145FJ0

145FJ000145FJ0

00

00

00

9R9

49R9

2R1

2R1

2R1

145FF4

020

145FF4

020

2R1

2R1

CODE COUNTRY FREQ

UA US/CAN-

UB US 692–716 155B11 155A11 150GB

MB /MCEUROPE

KK ENGLAND 838–862 155B11 155A11 150GB

MC NETHER-

ADA

SCANDA-

NAVIA

JA JAPAN 797–806 155A11 155B11 N/A N/A 145FF1

JB JAPAN 806–810 155B11 155A11 N/A N/A 145FJ000145FF4

LANDS

CODE COUNTRY FREQ

UA US/CAN-

UB US 692–716 150GB568CA150GB270JA150GB270

MB /
MD

MC NETHER-

EUROPE

SCANDA-

JA JAPAN 797–806 150GB478BA150GB478BA150GB478

JB JAPAN 806–810 150GB478BA150GB478BA150GB478

KK ENGLAND 838–862 150GB478BA150GB478BA150GB478

RANGE

MHz

782–806 155B11 155A11 150GB

800–830
800–820

774–782 155B11 155A11 150GB

ADA

NAVIA

LANDS

S101

S102CHC173 R156 R2 R3 C216 R150 R151 R152 R153 R154 R155

GRP

270JA

270JA

155B11 155A11 150GB

RANGE

MHz

782–806 150GB478BA150GB478BA150GB478

800–830
800–820

774–782 150GB478BA150GB478BA150GB478

C507 C144 C157

150GB478BA150GB478BA150GB478

270JA

270JA

270JA

N/A 145FJ000145FF4

N/A 145FJ000145FF4

N/A 145FF1

N/A 145FF1

145FF1

145FF1

001

BA

JA

BA

BA

BA

BA

BA

002

002

002

002

145FF2

145FF2

145FF2

145FF2

150GC

991

991

490

490

991

490

490

145FF1

473KB
150GC

473KB

N/A N/A 145FF1

N/A N/A N/A

150GC
473KB

N/A N/A N/A N/A N/A 145FF1

N/A N/A N/A N/A N/A N/A N/A

N/A N/A N/A N/A N/A

001
N/A N/A N/A N/A N/A 145FF1

N/A N/A N/A N/A

001

145FF1

N/A N/A N/A 145FF1

N/A N/A N/A

001

001

001

N/A N/A

N/A

001

Parts Designations

30

25C1043 (TK)

Shure UC1 Body-Pack UHF Transmitter

Side 1

UC1 Body-Pack Transmitter

Audio–Rf Printed Circuit Board

25C1043 (TK)

31 Parts Designations

Shure UC1 Body-Pack UHF Transmitter

Side 2

UC1 Body-Pack Transmitter

Audio–Rf Printed Circuit Board

Parts Designations

32

25C1043 (TK)