SmartTrunk Systems ST-2112D Service Manual

ST-2112D (450Mhz ~ 520Mhz)

UHF FM DIGITAL TRANSCEIVER

SERVICE MANUAL

SmarTrunk Systems, INC.

ST-2112D SM R1.2

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

2

Table of Contents

1. Specifications: ............................................................................................................................... 5

2. ST-2112 EXPLODED VIEW .............................................................................................................. 6

3. ST-2112 SIMPLIFIED DIAGRAM ..................................................................................................... 7

4. - ST-2112 RF DESCRIPTION ................................................................................................................ 8

4.1. Circuit Configuration ................................................................................................................. 9

4.2. Receiver System ........................................................................................................................ 9

4.2.1. Front-end RF Receiver ........................................................................................................... 9

4.2.2. ANALOG Audio Processing .................................................................................................... 9

4.2.3. Virtual Squelch Circuit ........................................................................................................... 9

4.2.4. Virtual VOLUME CONTROL .................................................................................................. 10

4.2.5. Sub audio signaling ............................................................................................................. 10

4.2.6. ANALOG AUDIBLE SIGNALING ............................................................................................. 10

4.2.7. DIGITAL AUDIO PROCESSING .............................................................................................. 10

4.3. Transmitter System ................................................................................................................. 11

4.3.1. ANALOG TX SIGNAL ............................................................................................................. 11

4.3.2. DIGITAL TX AUDIO: .............................................................................................................. 11

4.3.3. Drive and Final Amplifier Stages ......................................................................................... 11

4.3.4. Automatic Transmit Power Control .................................................................................... 12

5. RC-2112 ALIGNMENT .................................................................................................................. 13

5.1. Introduction ............................................................................................................................ 13

5.2. ALIGNMENT:............................................................................................................................ 13

5.3. Alignment Procedure .............................................................................................................. 14

5.3.1. GENERAL ALIGNMENT CONSIDERATIONS: .......................................................................... 14

5.4. MAIN RADIO ALIGNMENT ....................................................................................................... 15

5.5. TRANSMITTER ALIGNMENT: ................................................................................................... 15

5.5.1. Main Clock alignment: ........................................................................................................ 16

5.5.2. Transmit Power alignment: ................................................................................................. 17

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

3

5.5.2.1. High POWER LEVEL ALIGNMENT ..................................................................................... 17

5.5.2.2. Mid POWER LEVEL ALIGNMENT ...................................................................................... 18

5.5.2.3. LOW POWER LEVEL ALIGNMENT .................................................................................... 18

5.5.3. ANALOG MAXIMUM DEVIATION ........................................................................................ 18

5.5.4. Modulation Gain alignment: ............................................................................................... 18

5.5.5. FDMA DATA MODULATION alignment: .............................................................................. 19

5.5.6. TDMA DATA MODULATION alignment: .............................................................................. 20

5.5.7. EIA tones Level Alignment: ................................................................................................. 20

5.5.8. DTMF signaling level alignment: ......................................................................................... 20

5.5.9. DCS signaling alignment: ..................................................................................................... 21

5.5.10. CTCSS signaling alignment .................................................................................................. 21

5.5.11. FSK signaling alignment: ..................................................................................................... 22

5.6. RECEIVER ALIGNMENT ............................................................................................................ 23

5.6.1. DISCRIMINATOR GAIN ......................................................................................................... 23

6. COMPLEMENTARY RADIO ALIGNMENT ...................................................................................... 24

6.1. BATTERY WARNING LEVEL ...................................................................................................... 24

7. COMPLIMENTARY USER ALIGNMENT ......................................................................................... 25

7.1. OPTION ALIGNMENT: .............................................................................................................. 25

7.1.1. ANALOG Microphone gain: ................................................................................................. 25

7.1.2. ANALOG External Mic Gain: ................................................................................................ 25

7.1.3. ANALOG AGC ...................................................................................................................... 26

7.1.4. DIGITAL AGC ........................................................................................................................ 26

7.1.5. MINIMUM VOLUME LEVEL: ................................................................................................ 27

7.1.6. SQUELCH LEVEL: .................................................................................................................. 27

7.1.7. DISABLE RF POWER ............................................................................................................. 27

8. RADIO APPEARANCE ALIGNMENT .............................................................................................. 28

8.1. DISPLAYS AND LEDS: ............................................................................................................... 28

8.1.1. Auto backlight delay alignment: ......................................................................................... 28

8.1.2. Power on Text: .................................................................................................................... 28

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

4

8.1.3. Leds: .................................................................................................................................... 29

8.2. Tones ....................................................................................................................................... 29

8.3. ANNUNCIATION ...................................................................................................................... 29

9. ST-2112 SCHEMATIC ................................................................................................................... 32

10. ST-2112 FROM BOARD SCHEMATIC ............................................................................................ 33

11 ST-2112 COMPONENT LOCATOR (TOP LAYER) ............................................................................... 34

12 ST-2112 COMPONENT LOCATOR (BOTTOM LAYER) ....................................................................... 35

13 ST-2112 PCB TOP LAYER .................................................................................................................. 36

14 ST-2112 PCB BOTTOM LAYER .......................................................................................................... 37

15 ST-2112 PCB GROUND LAYER ......................................................................................................... 38

16 ST-2112 PCB POWER LAYER ............................................................................................................ 39

17 ST-2112 FRONT BOARD COMPONENT LOCATOR (TOP LAYER) ....................................................... 40

18 ST-2112 FRONT BOARD COMPONENT LOCATOR (BOTTOM LAYER)............................................... 41

19 ST-2112D BOM ................................................................................................................................ 42

20 ST-2112 KEYBOARD & DISPLAY BOM .............................................................................................. 51

21 ACCESSORY PORT: ........................................................................................................................... 53

22 ST-2112 SERVICE MANUAL REVISIONS ........................................................................................... 55

1. Specifications:

SPECIFICATION

ST-2112C

GENERAL

Frequency Range [Mhz]

450 TO 520

Channels

512

Groups/Banks

64

Power [Vdc]

6.4 to 8.8

Dimensions [mm]

130(H)x36(D)x52(W)

Weight [gr] (oz)

320 - (11.3)

Temperature range

- 30 °C ~ 60 °C (-22°F ~ +140°F)

Signaling

51 CTCSS tones / 183 DCS tones / 65534 SDR IDs

Reverse Burst

No

Display

128x64 (supports international characters)

Emergency call

Yes

GPS

Option

Channel Scan

Yes

BCLO / BTLO

Yes

Power Saver control

Yes

TOT

Yes

Radio Kill/Alive

Yes

Adjustable Power Selection

Auto + H/M/L

Key lock

Yes

Adjustable Squelch Level

16 Step

Password

Yes

Key Function selection

Yes

TRANSMIT

MAX RF power

4 W

Frequency Stability

>1PPM

Bandwidth [Khz]

6.25/12.5/25

Adjacent Channel Power

-65dBC (typ)

SNR

45dB typ

Analog harmonic distortion

3% typ (AF 1Khz, 60% deviation)

Data transmit rate

2400/4800/9600 bps

Max frequency deviation

2.5Khz@12.5Khz BW/5Khz@25Khz BW

Analog Modulation type

11K0F3E, 25K0F3E

TDMA Emissions

8K30F7E, 8K30F7D

FDMA Digital emissions

6K25F1E, 6K25F1D, 8K30F1E, 8K30F1D, 8K30F1W

Ext. Mic. Impedance

600 Ohms

RECEIV

ER

Analog Sensitivity

0.25uV (12dB Sinad)

Digital Sensitivity

0.25uV (3% BER)

Image rejection

60dB typ

Adjacent Channel selectivity

65dB typ @25KHz BW

HUM and NOISE ratio

45dB

Speaker Audio Power

1W

External audio power

1W

Specifications subject to change without notice or obligation

2. ST-2112 EXPLODED VIEW

ST-2112V

Jack Chang

Daniel Martin

2 . ST-2112 EXPLODED VIEW

3. ST-2112 SIMPLIFIED DIAGRAM

LPF

Ant Sw
D1/D3

Final

AMP

Q1

Power

Detection

D2

Driver

Q3

Buffer

AMP

Q2

TX CTRL

[U3]

CLOCK

[Y1]

POWER

CTRL

[U2]

FLASH

MEMORY

[U4]

RAM

MEMORY

[U7]

DISPLAY

GPS

G-SENSOR

PWM

KEYBOARD

SIDE
KEYS

USB

SERIAL

PORT

Main Processor

[U8]

Radio

U1

Audio Processor

Modem

[U5]

VOCODER

[U6]

CLOCK

[Y2]

MIC

AMP

[U12]

AUDIO

PA

[U10]

CLOCK

[Y3]

JP2

Notes:

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

9

4. - ST-2112 RF DESCRIPTION

4.1. Circuit Configuration

The receiver is a single receiver with
built-in DSP fully integrated.

Incoming signals from the antenna,
after passing through LPF filter, are
fed direct to the DSP down
converter to get the baseband voice
from 0Hz to 3500Hz.

Demodulated signals are filtered
and conditioned onto a second DSP
based filter, which also includes a
high efficiency 4FSK modem.

For digital demodulation, the
recovered data is fed into a vocoder,
which converts the data to voice.

Analog voice from the analog path
or the analog voice recovered from
the vocoder, are fed into an audio
power amplifier.

Transmit signal frequency is
generated by integrated VCO and
PLL. RF frequency generated by the
integrated RF chip is amplified into
a 3-step amplifier then filtered by a
low pass filter to be applied to the
antenna.

4.2. Receiver System

4.2.1. Front-end RF Receiver

Incoming RF signals from the
antenna are delivered to the
Receiver Unit and pass through a
Low-pass filter, antenna switching

diode, and then fed to the receiver
(U1) passing through a limiter BPF.

4.2.2. ANALOG Audio Processing

The RF signal is tuned by U1, which
includes a base band DSP audio
processing, recovering flat audio
from DC up to 3500 hz.

The detected audio is amplified,
filtered and conditioned inside of
U5 which also includes a de­emphasize filtering shape for
received audio signals

The output of the filtered and
conditioned audio is delivered to an
audio power amplifier (U10) then to
the speaker passing through the
external audio connector switch.

4.2.3. Virtual Squelch Circuit

S/N ratio is measured by the
receiver (U1) as the result of the
analysis of the signal and the noise
of the carrier. The output is sent to
the main processor as a digital
frame, which is analyzed by radio
firmware, removing noise then
qualifying the signal level. If the
signal level is higher than the

LPF

SWITCH

PROTECTION

FILTER

RECEIVER

[U1]

RECEIVER

[U1]

AUDIO

PROCESSOR

[U5]

AMPLIFIER

[U10]

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

10

expected for the current
programmed squelch threshold,
then the processor analyzes the
expected signaling programmed on
the current channel table.
In case of not any signaling is
required, or the signal has been
detected, the processor ask to the
audio processor (U5) to open the
audio path, unmuting the audio
amplifier (U10).

4.2.4. Virtual VOLUME CONTROL

The potentiometer position (RV1) is
measured by one analog to digital
converter on the audio processor
(U5), and then the information is
reported to the main processor. The
firmware immediately adjusts the
audio processor path gain to get the
appropriate overall circuitry volume
control.
Minimum volume, emergency and
private audio level are controlled
only by software overriding the
information received from the DAC
on U5.

4.2.5. Sub audio signaling

Received sub audio signaling like
CTCSS and DCS are received and
processed by the receiver (U1) then
detected on the audio processor
(U5). Once decoded, the sub audio
signaling is reported to the
processor where the firmware
compares it with the value
programmed into the current
channel programming.

If the received signaling matches
the channel programming, then the
main processor (U8) requests the

audio processor (U5) to open the
audio patch.

4.2.6. ANALOG AUDIBLE SIGNALING

DTMF signals, MDC1200 and tone
signals are processed and decoded
by the audio processor (U5).
Decoded information or received
tone is reported to the main
processor (U8).

4.2.7. DIGITAL AUDIO PROCESSING

Digital received information is
processed by the receiver DSP (U1)

then delivered to the audio
processor (U5), which includes a
high speed (4FSK) modem.
Data decoded by the modem is
transferred to the main processor
(U8) which de-encrypts the
information, checks the integrity,
corrects the wrong bits and extract
the audio information form the
received frame.

The portion of the data received,
error free, is moved to the vocoder
(U6).

The vocoder re-builds the audio
from the compressed data then
applies filter it, adjust the volume

RECEIVER

[U1]

AUDIO

PROCESSOR

[U5]

AMPLIFIER

[U10]

MAIN

PROCESSOR

[U8]

VOCODER

U6]

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

11

and fed it to the audio power
amplifier (U10).

4.3. Transmitter System

4.3.1. ANALOG TX SIGNAL

The AF signal from the internal
microphone (MK1) or external
microphone (J5) are processed as
differential signal, then it is
conditioned and transformed into
common mode by the microphone
pre-amplifier (U12).

The result of the conditioned in­band filtered signal is fed to the
Audio Processor (U5), which
provides audio compander,
emphasize, limitation, encryption,
etc.

The high audio band of the signal
from 300 to 3500 Hz are directly fed
to the transmitter (U1), which
performs a direct modulation of a
generated carrier.

Low frequency signaling audio are
fed directly to Y1 VC TXCO main
clock generator and U1 with a
corresponding balance controlled
by software.

4.3.2. DIGITAL TX AUDIO:

The AF signal from the internal

microphone (MK1) or external
microphone (J5) are fed directly to
the vocoder chip (U6) which
perform the data codification,
delivering the digitized and encoded
audio as digital frames which are
processed by the Main Processor
U8, which add a FEC (Frame Error
Correction), encrypt the
information and add the user
related information as user ID, etc.

The final data frame is fed to the
Audio Processor (U5) which has a
built in modem, which operates for
FDMA or TDMA signals, controlling
the modulation of the Transmitter
(U1) through the VC TXCO for DC
to low frequencies and the direct
modulation for higher frequencies.

4.3.3. Drive and Final Amplifier Stages

Final RF is amplified on Q2
(2SC3356) then filtered to be fed to
Q3 (2SK3475) then finally amplified
by Q1 (2SK3476) up to 5 watts
output power.

The transmit signal then passes
through the antenna switch D1
(BAR63) and is low-pass filtered to
suppress harmonic spurious
radiation before delivery to the
antenna

AMPLIFIER

[U12]

AUDIO

PROCESSOR

[U5]

TRANSMITTER

[U1]

VC TXCO

[Y1]

AUDIO

PROCESSOR

[U5]

TRANSMITTER

[U1]

VC TXCO

[Y1]

MAIN

PROCESSOR

[U8]

VOCODER

[U6]

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

12

4.3.4. Automatic Transmit Power

Control

The RF power detector (RB705D)
detects transmitted feedback then
sends the readout to audio
processor U5 (CMX-7141). Audio
amplifier compares the transmitted
power against the referred level
stored on current channel memory
adjusting the power control level
generated as reference by one DAC
output on the same Audio
processor (U5) then amplified by U2
(MCP6241U) controlling the gate
current on Q1 and Q17.

Evenly when power level is adjusted
by software on three levels (Hi, Med,
Lo) the power value can be adjusted
to any desired value between zero
and 5Watts by the alignment
software.

Notes:

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

13

5. RC-2112 ALIGNMENT

5.1. Introduction

The ST-2112 series is carefully
aligned in factory for the specified
performance, across the frequency
range depending for each version.
Realignment should therefore not
be necessary except in the event of
a component failure, or altering
version type.

All component replacement and
service should be performed only by
an authorized SmarTrunk
representative, or the warranty
policy may be void.

The following procedures cover the
sometimes critical and tedious
adjustments that are not normally
required once the transceiver has
left the factory.

However, if damage occurs and
some parts subsequently are
placed, realignment may be
required. If a sudden problem
occurs during normal operation, it
is likely due to component failure;
realignment should not be done
until after the faulty component has
been replaced.

We recommend that servicing be
performed only by authorized
SmarTrunk service technicians
who are experienced with the
circuitry and fully equipped for
repair and align. Therefore, if a fault
is suspected, contact the dealer
from whom the transceiver was
purchased for instructions
regarding repair. Authorized
Smartrunk service technicians
realign all circuits and make
complete performance checks to

ensure compliance with factory
specifications after replacing any
faulty components.

Those who do undertake any of the
following alignments are cautioned
to proceed at their own risk.

Problems caused by unauthorized
attempts at realignment are not
covered by the warranty policy.
Also, SmarTrunk reserves the right
to change circuits and alignment
procedures in the interest of
improved performance, without
notifying owners.

Under no circumstances should
any alignment be attempted unless
the normal function and operation
of the transceiver are clearly
understood, the cause of the
malfunction has been clearly
pinpointed and any faulty
components replaced, and
realignment determined to be
absolutely necessary.

5.2. ALIGNMENT:

The following test equipment (and
thorough familiarity with its correct
use) is necessary for complete
realignment. Correction of
problems caused by misalignment
resulting from use of improper test
equipment is not covered under the
warranty policy.

While most steps do not require all
of the equipment listed, the
interactions of some adjustments
may require that more complex
adjustments be performed
afterwards. Do not attempt to
perform only a single step unless it
is clearly isolated electrically from

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

14

all other steps. Have all test
equipment ready before beginning,
and follow all of the steps in a
section in the order presented.

Required Test Equipment

 RF Signal Generator with

calibrated output level at 1
GHz

 Deviation Meter (linear

detector)

 In-line Wattmeter with 5 %

accuracy at 1 GHz

 50 Ohm RF Dummy Load

with power rating 10W at 1
GHz

 8 Ohm AF Dummy Load

(Attention: Audio output is
BTL output)

 Regulated DC Power Supply

(standard 7.5 V DC, 3 A)

 Frequency Counter with 0.2

ppm accuracy at 1GHz

 Audio Generator
 AC Voltmeter
 DC Voltmeter
 UHF Sampling Coupler
 IBM PC / compatible

Computer with Microsoft®
Windows® XP or later
operating system

 SmarTrunk SDR

Programming software
(version 1.0.2 or later)

 USB A/B Programming Cable

5.3. Alignment Procedure

Alignment Preparation &
Precautions

A 50-Ohm RF Dummy Load and in­line wattmeter must be connected
to the main antenna jack in all
procedures that request for

transmission, except where
specified otherwise. Correct
alignment is not possible with an
antenna.

After completing one-step, read the
following steps to determine
whether the same test equipment
will be required. If not, remove the
test equipment (except dummy load
and wattmeter, if connected) before
proceeding.

Correct alignment requires that the
ambient temperature be the same
as that of the transceiver and test
equipment, and that this
temperature be held constant
between 68°F and 86 °F (20°C ~ 30
°C). When the transceiver is
brought into the shop from hot or
cold air, it should be required to
wait few minutes to come to room
temperature before alignment.

Whenever possible, alignments
should be made with oscillator
shields and circuit boards firmly
affixed in place. Also, the test
equipment must be thoroughly
warmed up before beginning.

Note: Signal levels in dB referred to
in the alignment procedure are
based on 0 dBm EMF = 1 mV.

5.3.1. GENERAL ALIGNMENT

CONSIDERATIONS:

Evenly if the radio is powered off,
the alignment software will detect
it, but some of the test cannot be
performed correctly.

Please be sure you turn the radio on
before continue with this alignment
procedure.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

15

In case the battery has not enough
charge, the test will be aborted by
the software. Please ensure the
battery has more than 50% of
remaining charge to complete the
test.

5.4. MAIN RADIO ALIGNMENT

Before setup any parameter, run
SDR programming software then
select Radio Alignment from top bar
menu.

A complementary message will be
displayed on the time the software
detects the radio connected to USB
port on the computer.

If the radio isn’t connected, then the
program will be timed out after 20
seconds.

As soon as the radio is detected,
actual radio parameters are loaded.

Once the radio is connected, a new
screen pops up showing all
alignment parameters. The
software downloads actual
alignment parameters stored into
radio memory, so the information
displayed on each alignment step is
the real value form the previous
alignment.

The radio also stores in a special
memory area, original values
assigned in factory. You can go
back to those values anytime for
any particular alignment step.

In case the radio is password
protected, dealer password is
required to access to this alignment
menu.

At any time, press to end
the alignment procedure then the
radio will returns to alignment
menu.

For any transmit related alignment
parameter, low power will be used.

5.5. TRANSMITTER ALIGNMENT:

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

16

7.5V Power Supply

PC compatible

On Line Wattimeter

30dB pad

Deviation Meter

Frequency Counter

Setup the test equipment as shown
for transceiver alignment, apply 7.5
V DC power to the transceiver.

The RF parameters are typed on the
alignment software to facilitate the
alignment within all radio band
avoiding special programming of
the radio before start alignment
procedure.

All parameters can be aligned
without relationship to any other,
so there is no an order to align. On
this way, you can adjust only the
desired parameter, avoiding to
waste time realigning other
parameters than required.

Before proceed to align any
parameter, a desired frequency
must be loaded into both TX and
RX. Evenly when the radio has
stable characteristics for all
bandwidth, it is recommendable to
align on middle of the radio working
band.

5.5.1. Main Clock alignment:

To align the main clock for radio Tx
and RX, please select Main Clock
Alignment option Alignment screen.

Fig 12: alignment menu

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you checks the Frequency Counter
to reach the desired frequency as
shown on Frequency field of the
alignment screen.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

This confirmation screen will
appears any time you want to
realign any parameter to Factory
Default.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

17

5.5.2. Transmit Power alignment:

ST-2112 has three power levels to
be selected for each channel. High,
medium and low power level can be
aligned as per radio usage
requirement.

For power alignment, you can do a
fine tuning as per your desire
frequency sub-band. The software
lets you linearize the complete band

“cutting” the complete band into

five steps to let you focus into your
frequency bands.

Even when the software has already
assigned the most convenient
frequency points to consider the
alignment, you still can enter
exactly the frequency of your
interest.

5.5.2.1. High POWER LEVEL

ALIGNMENT

To align the High Power level select
Power High Level.

Software automatically retrieves
actual level to the alignment slider.

This level has been aligned in
factory, but you still can adjust it as
per your desires.

To realign, please select [Start] then
move the slider or introduce the

value manually at the time you
check the real transmit power on
the wattmeter connected to the
radio as recommended on TX
alignment diagram.

As soon as [Start] is pressed, the
radio start to transmit a carrier, so
please verify the antenna dummy
load is properly connected to avoid
any damage to the transmitter.

As soon the desired value is
reached, press [Finish] to store the
value into radio memory.

If you want to load default High
power only, keeping any other value
without any change, press [Factory]
instead of [Start]. A pop up window
will ask you to confirm the default
parameters upload to the radio
power.

Press [OK] to confirm.

As descripted previously, you can
manually select the frequency
range to align, divided into five
different sub-ranges.

You can also define the right
frequency of interest to align, typing
the desired one into the frequency
field:

If selected frequency is not
supported by radio hardware, the
frequency field will be filled on red.
In case the PLL is locked, then it
becomes filled on green.

Please be sure that the PLL is
locked as soon as you press [Start],

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

18

otherwise the alignment should be
not correct.

5.5.2.2. Mid POWER LEVEL

ALIGNMENT

Repeat the same procedure to align
High Power, but select Power
Medium Level on the alignment
menu.

5.5.2.3. LOW POWER LEVEL ALIGNMENT

Repeat the same procedure to align
High Power, but select Power Low
Level on the alignment menu.

5.5.3. ANALOG MAXIMUM DEVIATION

Maximum deviation for analog
signals modulated from ST-2112
can be aligned by Max Deviation

alignment option from the
alignment menu.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you checks the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate a 1000Hz alignment
reference tone for alignment
proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

Wide band channels uses the same
limiter. No additional wide band
max deviation alignment is
required.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings

5.5.4. Modulation Gain alignment:

This is a critical parameter which
may not be realigned to different
values other than factory default.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

19

Lower gain means a very high
microphone gain must be assigned
to get the proper radio voice
deviation, and higher gain means a
risk because the max deviation
limit must be reached by any signal
which makes the limiter to
introduce distortion to avoid over
deviation.

Under your risk, if you still prefer to
realign the overall modulation gain,
you must select Modulator Gain on
Alignment screen.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you checks the deviation meter to
reach the desired signaling level for
narrow band operation.

For this alignment step, the radio
does not generate any signal. It only
stores the new value of the overall
modulation gain into the memory.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm

the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

5.5.5. FDMA DATA MODULATION

alignment:

To align 4FSK signaling deviation
for FDMA mode, select FDMA
Deviation on Alignment screen.

Actual alignment value will be

displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you checks the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate a 1000Hz reference tone
for alignment proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

20

5.5.6. TDMA DATA MODULATION

alignment:

To align 4FSK signaling deviation
for TDMA mode, select TDMA
Deviation on Alignment screen.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you check the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate a 1000Hz reference tone
for alignment proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

5.5.7. EIA tones Level Alignment:

EIA signaling generated by ST-2112
must be aligned by selecting EIA
Tones Level alignment option from
the alignment menu.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you check the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate a 1000Hz reference tone
for alignment proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

5.5.8. DTMF signaling level alignment:

DTMF signaling generated by ST­2112 must be aligned by selecting
DTMF Level alignment option from
the alignment menu.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

21

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you check the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate a 1000Hz alignment
reference tone for alignment
proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

5.5.9. DCS signaling alignment:

DCS signaling encoded from ST­2112 must be aligned by selecting
DCS Level alignment option from
the alignment menu.

Actual alignment value will be
displayed on alignment slider.

Press Start then move the slider to
reach the desired value at the time
you check the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate 134.4Hz audio tone for
alignment proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

5.5.10. CTCSS signaling alignment

CTCSS signaling encoded from ST­2112 can be aligned by selecting
CTCSS Level alignment option from
the alignment menu.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

22

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you check the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate 123.0Hz audio tone for
alignment proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

5.5.11. FSK signaling alignment:

To align FSK/PSK signaling
deviation, select FSK Mod Level on
Alignment screen.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value at the time
you check the deviation meter to
reach the desired signaling level for
narrow band operation. Radio will
generate a 1000Hz alignment
reference tone for alignment
proposes.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

23

5.6. RECEIVER ALIGNMENT

Setup the test equipment as shown
for Receiver alignment, apply 7.5 V
DC power to the transceiver.

The RF frequency must be loaded
on Receiver Frequency of the
alignment software to facilitate the
alignment within all radio band
avoiding special programming of
the radio before start alignment
procedure.

7.5V Power Supply

PC compatible

RF signal generator

RECEIVER ALIGNMENT SETUP

5.6.1. DISCRIMINATOR GAIN

This is a critical parameter which
may not be realigned to different
values other than factory default.

Under your risk, if you still prefer to
realign the overall modulation gain,
you must select Discriminator Gain
on Alignment screen.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value.

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

Default value is 0.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

24

6. COMPLEMENTARY RADIO

ALIGNMENT

6.1. BATTERY WARNING LEVEL

ST-2112 generates acoustic and
visual alerts when battery has
reached a low voltage.

Visual information is displayed on
battery icon which flashes with a
cross on it when the minimum
hardware value is reached.

Acoustic signaling is generated by
the radio when the battery warning
voltage is reached and this value
can be adjusted by the dealer.

To align battery warning levels,
select Battery Warning Level on
Alignment screen.

Actual alignment value will be
displayed on alignment slider.

Press [Start] then move the slider to
reach the desired value.

This value means the percentage of
charge when the radio starts the
warning signals to the user (visual
and acoustic).

As soon the desired value is
reached, press [Finish] to store the
value on radio memory.

Default value is 10 which
correspond to 10% of residual
charge to start the warning process.

If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

25

7. COMPLIMENTARY USER ALIGNMENT

The above parameters only can be
aligned under dealer login and most
of them should be critical for proper
radio performance.

Additional complimentary
parameters should be also aligned
on user login mode; it means the
user can align it as per the most
convenient way for particular radio
usage.

7.1. OPTION ALIGNMENT:

To access to the option alignment
menu, select Edit then Option form
the main software toolbar:

As soon as you click on Options…

the Options screen is popped up:

From this screen the user can
adjust:

7.1.1. ANALOG Microphone gain:

It aligns microphone sensitivity.

Alignment step is 3.2dB.

For noisy environments or when
voice encryption is used, we
recommend keeping it as low as
possible.

Press [OK] to store it in the file.

The value will be updated after the
file is transferred to the radio.

7.1.2. ANALOG External Mic Gain:

It aligns microphone sensitivity.

Alignment step is 3.2dB.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

26

For noisy environments or when
voice encryption is used, we
recommend keeping it as low as
possible.

Press [OK] to store it in the file.

The value will be updated after the
file is transferred to the radio.

7.1.3. ANALOG AGC

ST-2112 has an Automated Gain
Control for analog microphone.
This function adjusts the gain to
reach a dynamic gain value which
makes the analog voice deviation be
equivalent to the right deviation
produced by 50mV RMS on the
microphone output, and the
selected target gain.

If you want to use AGC, then you
must select the target equivalent
gain on the Mic Gain then check the
ACG Check Box.

For example, if you want a dynamic
gain which causes the same effect
that a gain of 6.4dB when the voice
on the microphone causes 50mV
RMS in the microphone output
(standard voice at 4 inches away
from the microphone), or 0dB gain
on the external microphone
connection, then you must program
the Analog Gain at 6.4dB and check
AGC as bellow:

Press [OK] to store it in the file.

The value will be updated after the
file is transferred to the radio.

7.1.4. DIGITAL AGC

ST-2112 has an Automated Gain
Control for digital microphone. This
function adjusts the gain to reach a
dynamic gain value which makes
the voice to be equivalent to the
right voice digitally played back in
the other end, produced by 50mV
RMS on the microphone output,
and the selected target gain.

If you want to use AGC, then you
must select the target equivalent
gain on the Mic Gain then check the
Digital ACG Check Box.

For example, if you want a dynamic
gain which causes the same effect
that a gain of 15.0dB when the
voice on the microphone causes
50mV RMS in the microphone
output (standard voice at 4 inches
away from the microphone), or

6.0dB gain on the external
microphone connection, then you
must program the Digital Gain at

15.0dB and the external gain on

6.0dB, then check Digital AGC as
bellow:

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

27

Press [OK] to store it in the file.

The value will be updated after the
file is transferred to the radio.

7.1.5. MINIMUM VOLUME LEVEL:

This alignment lets the user to
ensure the speaker level should be
audible, evenly when the volume
control potentiometer is fully closed
counter clockwise.

Minimum volume level can be
aligned up to 250 (max) step 1.

7.1.6. SQUELCH LEVEL:

ST-2112 supports individual
squelch alignment for any channel
to be programmed individually on
each frequency defined into the
frequency chart of each bank. On
this way, the user can set a higher
threshold level for noisy channels
and lower for clear channels.

Once programmed, if due to the
proximity of the radio to a noisy
environment the squelch level is not
high enough, the user can adjust a
common reference for all the
channels in the radio by adjusting
the general squelch level.

Option screen on the edit menu,
lets you to program the default
squelch reference for all the
channels. This value can be
adjusted on the fly for the user if the
dealer program on squelch control
key or navigating through the radio
menu.

To set a desired squelch reference,
please select you desired squelch
level form the list:

Press [OK] to store it in the file.

The value will be updated after the
file is transferred to the radio.

7.1.7. DISABLE RF POWER

Use this box to check when you do
not want to use the RF power
amplifier. It is commonly used for
dealers to make a demonstration of
the radio features without
interfering to any other existing
user in the frequency or for
operation without antenna
connected to the radio.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

28

To disable the RF power amplifier,
check the box:

Press [OK] to store it in the file.

The value will be updated after the
file is transferred to the radio.

8. RADIO APPEARANCE ALIGNMENT

Radio appearance can be
customized as per user
requirement.

Select Edit then appearance from
radio top toolbars to access to the
appearance screen:

A soon as Appearance option is
selected, a new window will pop up:

8.1. DISPLAYS AND LEDS:

This screen lets you adjust the
behavior of the display and
keyboard backlight.

8.1.1. Auto backlight delay alignment:

The auto backlight mode,
automatically set on power off
status to the backlight, after any
event, to reduce the battery
demand.

To change the value of the delay
before the backlight is powered off;
please enter the quantity of desired
seconds for it.

8.1.2. Power on Text:

Type here the text to show on the
display when the radio is powered
on.

This string is very convenient for
radio identification or dealer
advertising at the time the radio is
powered on.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

29

The option to activate or deactivate
the power on text is disabled.

8.1.3. Leds:

Future version will allow the user to
disable the function of Rx and TX
led. Some application, as security,
sometime demands no lights on the
radio.

8.2. Tones

Second folder on appearance screen
allows the user to adjust the tones
which are played back in any event.

Tones can be changed by the
dealer.

Check Key PTT if you want to play
back a tone to acknowledge any
time PTT key is pressed.

Check De-Key PTT if you want to
play back a tone to acknowledges
any time PTT is released.

Check Keypad if you want to play
back a tone to acknowledge any
time any keyboard key is pressed.

Check Pre TOT if you want to play
back a tone to allert when time out

timer is close to expire (5 seconds
ahead).

Check Rotary if you want to play
back a tone to acknowledges any
time the rotary switch changes its
position.

8.3. ANNUNCIATION

Third folder on appearance screen,
allows the user to define if the radio
will play back any annunciation
message for some important events,
as per the associated check box.

Voice and language of the
annunciation events can be
adjusted as per user request.

Please refer to appendix III to learn
about it.

Check Bank if you want the radio
plays a concerning message back
any time current bank has been
changed.

Check Channel if you want the
radio plays a concerning message
back any time current channel has
been changed.

Check Squelch mode if you want
the radio plays a concerning

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

30

message back any time squelch
function is changed.

Check Battery level if you want the
radio plays a concerning message
back any time battery level is below
the value programmed as Battery
Warning Level on alignment screen.

Check Power if you want the radio
plays a concerning message back
any time power level (high, med, low
or auto) has been changed.

Check GPS if you want the radio
plays a concerning message back
any time the GPS changes the
status: Powered on, Powered Off,
Fix, etc. (only on those versions
which includes GPS)

Check RSSI if you want the radio
plays a concerning message back
any time you ask for current RSSI.

Press OK once you finish the setting
of all desired messages. This
feature will be stored into the file
then it will be transferred to the
radio at the time the file is uploaded
to the radio.

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

31

This page left blank intentionally

9. ST-2112 SCHEMATIC

PAENA

CSRAM

Title

Size Doc ument Number Rev

Date: Sheet of

DM-0911-15 F

RC-2112 R1.4 REF LAYOUT 1.4

D

1 1Friday, July 11, 2014

U10

BH7824

CTLR

1

B_OUT

2

B_IN

3

SP_IN4SP1

5

VCC

6

GND

7

SP2

8

C44
1nF

C173
10nF

F1

C2Q 3

C175
1uF

+

C93

10uF 2K2

C174
1uF

R141 6. 8K

R106
10K

R107

120K

D6
DAN222

132

R45
47K

5VAF

C178

2.2uF

VOL

C179
1nF

J3

ROTARY

1

2

3

4

5

6

PWR_FB

C176 100nF

C194
100pF

18V+5V

C235
10nF

+

C231

10uFC248

10nF

U16
HT7218

Vin

1

GND

2

Sht

3

Vout

5

BP

4

C249
1nF

R126
10

C45
NC

C74

100nF

Q5

DTC114EM

R121
47K

C223
1nF

R115 10K

C193
47pF

R95
10K

R41

1K

C160

1uF

C148
1nF

C98
1uF

R90

10K

PWR_TUNE

C119
100nF

C120
10uF

R96
3K3

C158

1uF

C149
1nF

R91

10K

MOD2

R42

4K7

Y3

16Mhz

12

3 4

R79
47

C192
47pF

C140
100nF

t

RT1
33tk

1

2

C169

1nF

3VD

PROC ESS OR C LOC K

C5
100nF

UPCK

C155
NC

J6

CON4

1

2

3

4

C66
100nF

C89
NC

150

220K

10

1uF

MOD1

MOD2

15pF

C191
47pF

R81 1K
R85 1K

C144
1nF

CLKADJ

CLKADJ

C258

100nF

CSFM

TP3

1

TP1

1

TP2

1

C161

0

R94
10K

R89

33K

C156
100nF

SDA
SCL

3VA

C145
1nF

C147
NC

3VD

10pF

SCL

SDA

+7V +5V

C187
1nF

C190
100pF

C189
100pF

C188
1nF

10uF

BAR63

L18

LCB1608-600

C186
1nF

C80

2.2uF

C127
10nF

R32
22K

C81
NC

C184
1nF

5pF

U4

AT23DF321

CS

1

SO

2

WP

3

GND4SI

5

SCK

6

HOLD

7

VCC

8

VBUS

3VD

R93 10K

R31
100K

MOD1

C224
1nF

J7

HEADER 2

1
2

U5

CMX-7141

SMOSI

1

SSCK

2

SMISO

3

SCS

4

BOOTEN1

5

BOOTEN2

6

DVSS

7

IRQN

8

VDEC

9

GPIOA

10

GPIOB

11

SYSCLK113DVSS14TXENA15DISC16DISCFB17ALT18ALTFB19MICFB20MIC21AVSS22MOD123MOD2

24

VBIAS

25

AUDIO

26

ADC1

27

ADC2

28

ADC3

29

ADC4

30

AVDD

31

DAC1

32

DAC2

33

AVSS

34

DAC3

35

DAC4

36

DVSS

37

VDEC

38

XTAL/CLK

39

XTALN

40

DVDD

41

MOSI42MISO

43

SSOUT

44

DVSS

45

SCK

46

SYSCLK2

47

CSN

48

AGND

49

U6

CMX-618

AVDD

1

AVSS

2

BIAS

3

VSSREF

4

INPP

5

INPN

6

AVDD

7

AVSS

8

VSSPA

9

OUTP

10

OUTN

11

VDDPA

12

VDD13IOVDD14ECDI15ECDO16ECCLK17ECCS18EEC19RESC20NC21VSS22CSEL23IOVDD

24

SYNC

25

VSS

26

XTALIN

27

XTALOUT

28

IOVDD

29

RESETC

30

XTALSEL1

31

XTALSEL2

32

XTALSEL3

33

ENABXTAL

34

IOVDD

35

NC

36

NC37NC38NC39NC

40

VSS

41

SCLK

42

SMOSI43SMISO

44

CSC

45

IRQC

46

IOVDD

47

VDD

48

AGND

49

RADIO CLOCK

R4 NC

GPSRX
GPSTX

POWER CONTROL

SCK
MISO

MOSI

R14 1K

C64
100nF

IRQA

R58 1K

AUDIO

GPSTX

3VA

C65
1nF

ROW3

TX POWER SUPPLY

C49
5pF

ROW2

ROW1

NAV

GPSRX

C106
10uF

C105
10uF

10pF

Y2

TXCO19.2M

12

3 4

R40
47

C99
100nF

C47
100nF

C48
1nF

Q4
DTA114EM

R137
1K

C206
1nF

C207
1nF

C210
1nF

C211
1nF

C208
1nF

C209
1nF

C212
1nF

13nH

C76
NC

C216
1nF

L15
47nH

82pF

PWCTRL

L9
27nH

R52 1K

C50
NC

R15 1K

CSR

RDA POWER SUPPLY

C88

1nF
C97

1nF

R39
100

R44
100

3VD

XC2

XC1

XC2

XC1

CODEC

C213
1nF

C214
1nF

D3
BAR63

C215
1nF

PROG RA MMI NG

27nH

0

15nH 15nH

13nH 13nH 13nH

13nH

150pF

150

47pF

R68 22
R70 22

UPCK

22

R55

10K

3VD

CSD

VBAT

SUB

FNC

D0
D2

D1

D4

D3
D5

D6

2pF

U18
XC6201

VIN3VOUT

1

GND

2

D7
GPS

SCK
MISO

MOSI

+

C198

10uF

C183
1uF

SCK

MOSI
MISO

7pF

10pF

33pF

C25

1nF

C51
NC R25

560

U8

AT90USB

BIAS

1

SMTK

2

NC1

3

UDP

4

UDM

5

UVSS

6

UCAP

7

VBUS

8

UID

9

TX_LED

10

SCK

11

MOSI

12

MISO

13

SPEECH

14

IRQVOC

15

C3VR

16

IRQN17GPS18RESET20VCC121GND122NC223SYSCLK24SCL25SDA26RXD27TXD28RSWA29RSWB30RSWC31RSWD

32

EXTPTT

33

IRQR

34

CSFM

35

CSRAM

36

CSR

37

CSD

38

CSA

39

CSN

40

CBL

41

SUBD

42

RX_LED

43

D7

44

D6

45

D5

46

D4

47

D3

48

D249D150D0

51

VCC2

52

GND2

53

SIDE

54

VBAT55FMIC

56

ROW157ROW258ROW3

59

FNC

60

NAV

61

AVCC1

62

AGND

63

AVCC2

64

CHR

19

GND

65

13nH

R22
2K2

Q2

2SC33563

2

1

R111 1K

BAT

U11

MIC2290

IN

2

EN

3

GND4GND

8

SW

7

OUT

1

FB

6

NC

5

HS

9

L17

10uH

+

C181

10uF

R26
22C52

150p

6.8pF

R108

33K
R110
3K3+C182

10uF

RESET

R92 10K

C136

4.7uF

VCTRL

3VD

TEMP

D5

RR264M

RESET

MOSI

SCK

MISO

VBUS
UDP
UDM
UID
UVSS

150pF

C20
10nF

CBL

L5
47nH

P1

TEST 1

1

1

R16
470

MAIN CLOCK

15pF

C14
150pF

R12
10

TX5V

DET

C26
100pF

C33
8pF

C67
NC

CSA

150pF

220K

C62

100pF

L16
NC

L14
0

C34
**

L10
0

D4
HSM88AS

3

1

2

AUDIO

SIDE

SDA

C40
1nF

IRQA

BAR63

C168
10uF

C167
100nF

RXD

C219

100pF

TX5V

NAV

JP2

CONN18X2

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

15

15

16

16

17

17

181819

19

20

20

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

29

29

30

30

31

31

32

32

33

33

34

34

35

35

36

36

U2

MCP6241U

Vin+

1

VSS

2

Vin-

3

Vout

4

VDD

5

R43
82K

C90
10nF

R34
120K

C83
10nF

TP9

1

R35
470K

P4

HEADER 1

1

1

P5

HEADER 1

1

1

P6

HEADER 1

1

1

P7

HEADER 1

1

1

P8

HEADER 1

1

1

P9

HEADER 1

1

1

P10

HEADER 1

1

1

P11

HEADER 1

1

1

MOD1

MOD2

R17
47

VOL

AUDIO

OUTP

RV1
10k

3 1

2

4

5

R18
47K

C61

0

DET

MOUT

PWR_TUNE

3VD

PWFB

C123
100nF

C124
10uF

C222
10nF

18V

P12

HEADER 1

1

1

P13

HEADER 1

1

1

P14

HEADER 1

1

1

3VA

C138
10nF

C220
100pF

C16
10nF

C15
150pF

R83 4K7

3VD

PWR_TUNE

R13
10K

Q3
2SK34751

3

2

+7V

+

C257

22uF

P17

HEADER 1

1

1

P15

HEADER 1

1

1

P16

HEADER 1

1

1

3VD

3VR

3VD

L6
27nH

5VAF

+5V

C21
1nF

+7V

C77
NC

L2
BEAD

1

2

C153
100nF

C154
1nF

C4
10nF

C3
1nF

3VD

R72 330

RAD IO

C103
1nF

3VR

13nH

TXLED

RXLED

D8
LTST-C195KGJRKT

2 4

1 3

3VR

PINK VALUES CORR ESPOND TO ST-2112C

+

C63
10uF

C29
NC

C24
68pF

R76 330

P18

HEADER 1

1

1

+

C82

22uF

100pF

100pF

47pF

1uF

7pF 22pF

0.5pF 0.5pF
150pF

6.8pF

C118
1nF

L8
0

C117
100nF

C35
**

TP7

1

C36
**

TP8

1

TP5

1

TP6

1

C37
15pF

TP4

1

C38
56pF

R23
470

SPEECH

C19
1nF

Q1
2SK3476

1

3

2

22pF

10

R87
10K

SMTK

C43
NC

C41
NC

C42
NC

18V

15nH

C46
NC

R98
4K7

CSA

C141
1uF

C116
1nF

C115
100nF

R21
47

C17
1uF

J8

HEADER 2

1
2

C18
150pF

27pF

3VA

FNC

ROW3

ROW1
ROW2

C135
100nF

R19
10K

R10
10K

PWR_TUNE

PWFB

R11
47K

TEMP

C139
NC

L4
27nH

L1

LCB1608-600

1

2

+7V

C134
100nF

3VD

C13
1nF

C12
470pF

C1
150pF

Y1

12.8Mhz

12

3 4

+

C2

10uF

R100 1K

C84
1nF

CSN

C162
1nF

GREEN VALUES CORR ESPOND TO ST-2112V

IRQR

C230
1nF

SCL

R133 10K

CHR

MICP

MICN

5pF

7pF

C163
1nF

CBL

C128
1nF

C146
NC

R62

10K

R104

0.2

BAT

CHR

R86 1K

VBUS

R97 1K

100pF

3VR+5V

OUTP

C233
10nF

C164
1nF

+

C227

10uF

OUTP

R124

2.2

U14
HT7233

Vin

1

GND

2

Sht

3

Vout

5

BP

4+C228

10uF

SMTK

C137

100nF

C129
1nF

R82

10k

C180
100pF

J9

HEADER 2

1
2

C170
NC

18V

C87

NC

C150
100nF

C165
1nF

SMARTRUNK SYSTEMS, INC

C130
1nF

VCTRL

R9
1K

27pF

ACCESORY

LEDS

MAIN POWER SUPPLY AUDIO POWER SUPPLY

EXT PTT

PROCESSOR POWER SUPPLY

MICROPHONE

ANALOG POWER SUPPLY CODEC POWER SUPPLY

BATTERY

BATTERY CHARGER

MEMORIES

C152
100nF

R131
10

MAIN PROCESSOR

C255
10uF

C256
10uF

R129 6. 8K

13nH

C131
1nF

R117
47

J1

Antenna

1

2

3

4

5

6.8pF

0.5pF

C5VT

3VD

AUDIO PA

150pF

R132 10

C142
1nF

MICN

+5V

R27
2M2

+7V

C171
NC

+

C236
1uF

R127

2.2

U17

XC6201

VIN3VOUT

1

GND

2

+

C237
10uF

L7

3.3nH

CSRAM
CSFM

C78
150pF

R29
100

J2

USB

1
2
3
4
5
6
7

CSR

C32

1nF

C30
1pF

CSN

R80 0

C55
15pF

R30
100K

R78 0

C58
18pF

PWFB

C31
1pF

R73 0

R28
100

R77 0

L13
22nH

R75 0

C59
5pF

R74 1K

R61

10K

R66 1K

R71 1K

R59

10K

R69 1K

R60

10K

R67 1K

R65 1K

R63

10K

3VD

R7 1K

R5 1K

R6 1K

C143
NC

PAENA

D7

RB886

IRQN

IRQR

+7V

R128

2.2

PWR_FB

3VD

R54 1K

R53 1K

R51 1K

C121
1nF

R119
10K

R114

22K

VINT

R112
100K

C23

1nF

MODEM

2.4pF 2pF

15pF

TX5V

R8
100

C8
470pFL3.82uH

3VD

L12

22nH

C57
27pF

C54
12pF

MISO

SCK
MOSI

0.5pF

VBUS

15nH

3VD

MISO

U7

23K640

CS

1

SO

2

WP

3

GND4SI

5

SCK

6

HOLD

7

VCC

8

SCK
MOSI

C151
100nF

R138
100

SPEECH
DET

22

3VR

C7
1nF

L11

22nH

C56
39pF

C110
1nF

C27
82pF

D1

BAR88

R139
100K

FMIC

22uF

FMIC

MICP

C159 1uF

MOUT

EXTK

C244
1nF

C247

1nF

EXTK

3VD

R113
470

R116
4K7

C111
1nF

D9

RB886

C185

4.7uF

C199
100pF

U1

RDA1846

AVDD1

1

SCK

2

MOSI

3

AVDD2

4

XTAL1

5

XTAL2

6

MODE

7

CSR

8

AFO9NC110MIC11CC12AVDD313NC214RFIN15AVDD4

16

NC3

17

RFOUT

18

NC4

19

NC5

20

AVDD5

21

PABIAS

22

AVDD6

23

PDN

24

IO725IO626IO527IO4

28

MISO

29

INT

30

SUBD

31

SUB

32

GND

33

C100
100nF

R56

10K

C112
1nF

IRQVOC

MISO

CSVOC

MOSI
SCK

C226
1nF

SCK

15pF

15pF

CSVOC

C53
10pF

C241

1nF

IRQVOC

MOSI

C232

1nF

C200
100pF

TXLED

RXLED

C113
1nF

R57 22K

R64 1K

27nH

C201
1nF

2K2

C240
10nF

C202
1nF

R120
100K

C73
1nF

C72

100nF

C3VR

MOUT

2.4pF

C3VR

C60

0

3VD

+5V

LS1

SPEAKER

C68
150pF

C251
10nF

+

C243

10uF

C254

100nF

C253

1nF

R130

2.2

U19
HT7233

Vin

1

GND

2

Sht

3

Vout

5

BP

4

TXD

C252
10nF

TXD

U3
HT7250

Vin

1

GND

2

Sht

3

Vout

5

BP

4

TX5V

C177
100nF

C166
100pF

C203
1nF

C94
10nF

JP1

PROG

1
2
3
4
5
6
7

R37

2.2

R134

2K2

R135

1K

+7V

VINT

+

C91

10uF

R140 10K

EXTPTT

CSD

GPS

C101
10nF

C5VT

J4

3.5mm

1
2
3
4
5

+

C238
1uF

C71
1nF

C70
1nF

R2

10

3VA

SW4

SW KEY-YM061

12
3
4
5
6
7
8

R136

4K7

SIDE

+5V

C204
1nF

+

C95
10uF

C234
10nF

+

C229

10uF

PWCTRL

U15
HT7233

Vin

1

GND

2

Sht

3

Vout

5

BP

4

C246
1nF

R125

2.2

R105 22k

C245
10nF

R109 22k

C11
1nF

J5

TG-2915

1
2
3
4
5

C96
10nF

C10
100nF

SIDE UP

PTT

R33
100

SIDE DOWN

EMERGENCY

C126
100nF

C125
NC

SUB

5VAF

C205
1nF

VBAT

R122

33K

+

C239
10uF

R123
47K

C122
1nF

RCLK

RCLK

+

C86

10uF

TX5V

R36

56K

0

RXD

3VD

MK1

MIC

1
2

C217
1uF

C85
10nF

TX5V

D1

D0
D2

R46
47K

D3
D4

C102

10nF

REFERENCES

IF COMPONENT IS D IFERENT BETWEEN THE DI FERENT
MODELS, THEN YOU WILL FIND THREE VALUES UNDER THE COMPONENT.

BLUE VALUES CORRESPON D TO ST-2112V

D5
D7

D6

IRQN

C133
1nF

C250

1nF

150pF

5pF

R38
22K

R118
1K

R50

10K

C157 1uF

EXTPTT

C242
10uF

C132
10uF

3VA

U12

MCP6241U

Vin+

1

VSS

2

Vin-

3

Vout

4

VDD

5

C114
1nF

C221

4.7uF

10. ST-2112 FROM BOARD SCHEMATIC

CSA

SCK

U4

LIS302

VDDIO

1

GND

2

VDD

3

GND

4

GND

5

VDD

6

CS7INT1

8

INT2

9

GND

10

GND

11

MISO

12

MOSI

13

SCK

14

CBL

3VD

C21

104

R43

220

3VD 3VA+5V+7V

D5

D3

D7

D1

JP1

HEADER 18X2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18 19

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

GPSRX

IRQA

MOSI

SCK

GPSTX

ROW3

D4

MISO

ROW1
ROW2

D5

D1

CSD

GPS

D6

D2

CSA

NAV

D3

FNC

SDA

SCL

CBL

D7

D0

TP3

1

TP2

1

TP1

1

R34
10

C28
105

CSD
D5

SCK

D6
MOSI

3VD

C29 225

D0

D1

D2

MOSI
MISO

IRQA

SDA

SCL

+7V

J1

CON8

1
2
3
4
5
6
7
8

C30 225

C31
334

R42
NC

VBL

F1

NC

R3
1K

R4
1K

R5
1K

R6
1K

D3

R38 27K

R41
22K

VBL

ROW3ROW2ROW1

NAV

SW1

1234

SW9

1234

SW8

1234

SW3

1234

SW2

1234

SW14

1234

SW13

1234

SW12

1234

SW10

1234

SW17

1234

SW15

1234

SW19

1234

SW18

1234

TP6

1

SW16

1234

SW20

1234

SW11

1234

R39

2K2

R35

1k

R29

2k2

R21

4k7

R40

1k

R33

4K7

R36

1k

R30

2k2

R22

4k7

R37

1k

R31

2k2

R23

4k7

R24

1K

R20
0

R19
0

R7
NC

D4

R10
NC

D7

D2
R8
330

C11
102

+5V

R9
10

C8
103

+

C7

106C10

104

U2
HT7233

Vin

1

GND

2

Sht

3

Vout

5

BP

4

TP4

1

SW7

1234

SW6

1234

SW5

1234

SW4

1234

R27

1k

R26

2k2

R25

4k7

FNC

ACCESY PORT POWER SUPPLY

U1

PEB-916

ANT1AGND12AGND23AGND34VBAT5GND16NC7AGND48AGND59AGND610VCC

11

AGND7

12

NRES

13

AGND8

14

GND2

15

NC

16

AGND9

17

NC

18

AGND10

19

1PPS

20

AGND1121AGND1222AGND13

23

GND

24NC25

AGND14

26NC27

AGND1528AGND16

29

TX0

30

RX1

31

NC

32

GND

33

NC

34

AGND17

35

AGND18

36

F2

200mA

C32
104

SMARTRUNK SYST EMS, INC

+

C2

106

JP2

HEADER 14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

U5

MIMD10A

E2N

1

B2N

2

C1P3E1P

4

B1P

5

C2N

6

VBL

Title

Size Document N umber Rev

Date: Sheet of

DM-1001-111026 C

ST-2112 - FRON T BOARD

B

1 1Wednesday , Augus t 29, 2012

F2F1 F4F3

UP

RIGHTLEFT

GPSTX

GPSRX

R2

4K7

+7V

C1

NC

C12
103

+

C9

106

+5V

C14
102

C13
104

U3
HT7233

Vin

1

GND

2

Sht

3

Vout

5

BP

4

R11
10

D8

D4

R17
330

R12
330

R15
330

D6

GPS

3VD

C4
8PF

L1

ANT

R1
1K

6MNO5JKL4GHI

*

9WXYZ8TUV7PQRS

2ABC1

#0

3DEF

TP5

1

11 ST-2112 COMPONENT LOCATOR (TOP LAYER)

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

35

12 ST-2112 COMPONENT LOCATOR (BOTTOM LAYER)

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

36

13 ST-2112 PCB TOP LAYER

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

37

14 ST-2112 PCB BOTTOM LAYER

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

38

15 ST-2112 PCB GROUND LAYER

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

39

16 ST-2112 PCB POWER LAYER

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

40

17 ST-2112 FRONT BOARD COMPONENT LOCATOR (TOP LAYER)

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

41

18 ST-2112 FRONT BOARD COMPONENT LOCATOR (BOTTOM LAYER)

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

42

19 ST-2112D BOM

NAME

DESCRIPTION

VALUE

RANGER PN

MAIN PCB

EPL211010D

C1

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C14

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C15

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C18

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C68

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C78

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C12

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C21

CAP CER 150PF 50V C0G 0402

150pF

CK1151AK5A

C95

CAP TANT 10UF 10V 10% 1206

10uF

CTY101066ZR

C2

CAP TANT 10UF 10V 10% 1206

10uF

CTY101066ZR

C91

CAP TANT 10UF 10V 10% 1206

10uF

CTY101066ZR

C182

CAP TANT 10UF 10V 10% 1206

10uF

CTY101066ZR

C237

CAP TANT 10UF 10V 10% 1206

10uF

CTY101066ZR

C239

CAP TANT 10UF 10V 10% 1206

10uF

CTY101066ZR

C181

CAP CER 10UF 10V Y5V 0805

10uF

CK0106AB7R

C63

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C86

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C93

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C105

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C132

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C198

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C227

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C228

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C229

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C231

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C242

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C243

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C255

CAP CER 10UF 6.3V X5R 20% 0603

10uF

CK6106AD6T

C136

CAP CER 4.7UF 6.3V 20% X5R 0402

4.7uF

CK6475AK6T

C185

CAP CER 4.7UF 6.3V 20% X5R 0402

4.7uF

CK6475AK6T

C221

CAP CER 4.7UF 6.3V 20% X5R 0402

4.7uF

CK6475AK6T

C19

CAP CER 1000PF 50V 0603 LOW DIST

1nF

CK1102AD5XR

C3

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C7

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C11

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C13

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C40

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

43

C48

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C65

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C70

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C71

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C73

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C84

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C88

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C97

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C103

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C110

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C111

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C112

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C113

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C114

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C116

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C118

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C121

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C122

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C128

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C129

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C130

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C131

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C133

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C142

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C144

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C145

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C148

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C149

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C154

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C162

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C163

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C164

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C165

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C169

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C179

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C184

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C186

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C187

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C188

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C201

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C202

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

44

C203

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C204

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C205

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C206

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C207

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C208

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C209

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C210

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C211

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C212

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C213

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C214

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C215

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C216

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C223

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C224

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C226

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C230

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C232

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C241

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C244

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C246

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C247

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C249

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C253

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C44

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C250

CAP 1000PF 50V CERAMIC X7R 0402

1nF

CK1102AK5X

C166

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C180

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C189

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C190

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C194

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C199

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C200

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C219

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C220

CAP CERAMIC 100PF 50V NP0 0402

100pF

CK1101AK5A

C26

CAP CERAMIC 22PF 50V NP0 0402

22pF

CK1220AK4A

C23

CAP CER 100PF 100V 10% NP0 0603

100pF

CK4101AD5A

C32

CAP CER 150PF 100V 10% NP0 0603

150pF

CK4151AD4A

C8

CAP CERAMIC 47PF 50V NP0 0402

470pF

CK1471AK4A

C4

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

45

C20

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C83

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C85

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C90

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C94

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C96

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C101

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C102

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C127

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C138

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C173

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C222

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C233

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C234

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C235

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C240

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C245

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C248

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C251

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C252

CAP CERAMIC .01UF 50V X7R 0402

10nF

CK5103AK5X

C5

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C10

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C47

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C64

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C66

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C72

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C74

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C99

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C115

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C117

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C119

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C123

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C126

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C134

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C135

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C137

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C140

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C150

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C151

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C152

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C153

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

46

C156

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C167

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C176

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C177

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C100

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C258

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C254

CAP .10UF 16V CERAMIC Y5V 0402

100nF

CK5104AK5X

C16

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C17

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C98

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C141

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C157

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C158

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C159

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C160

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C174

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C175

CAP CER 1.0UF 6.3V X5R 20% 0402

1uF

CK6105AK6T

C236

CAP CERAMIC 1UF 16V Y5V 0603

1uF

CK5105AD7RR

C238

CAP CERAMIC 1UF 16V Y5V 0603

1uF

CK5105AD7RR

C24

CAP CER 82PF 50V 5% NP0 0603

82pF

CK1820AD4AR

C56

CAP CER 6.8PF 50V 5% NP0 0603

6.8pF

CK9689AD4A

C59

CAP CER 6.8PF 50V 5% NP0 0603

6.8pF

CK9689AD4A

C25

CAP CER 7PF 50V NP0 0402

7pF

CK1070AK2A

C33

CAP CER 8PF 50V NP0 0402

8pF

CK1080AK2A

C30

CAP CERAMIC 0.5PF 50V C0G 0402

.5pF

CK1059AK1A

C31

CAP CERAMIC 0.5PF 50V C0G 0402

.5pF

CK1059AK1A

C46

CAP CER 15PF 250V 10% SMD 0603

15pF

CK9150AD4A

C37

CAP CER 15PF 50V SMD 0603

15pF

CK1150AD4A

C55

CAP CERAMIC 2PF 100V NPO 0603

2pF

CK4020AD1A

C54

CAP CERAMIC 2.4PF 100V NPO 0603

2.4pF

CK4249AD1A

C58

CAP CER 5PF 250V C0G SMD

5pF

CK9050AD1A

C57

CAP CER 5PF 250V C0G SMD

5pF

CK9050AD1A

C42

CAP CER 27PF 250V SMD 0603

27pF

CK9270AD4A

C82

CAP CER 22UF 6.3V 20% X5R 0603

22uF

CK6226AD6T

C257

CAP CER 22UF 6.3V 20% X5R 0603

22uF

CK6226AD6T

C178

CAP CER 2.2UF 16V Y5V 0603

2.2uF

CK5225AD7R

C80

CAP CER 2.2UF 4.0V X5R 20% 0402

2.2uF

CK6225AK6T

C41

CAP CER 10PF 50V NPO SMD 0603

10pF

CK1100AD4A

C24

CAP CER 47PF 50V 1% NP0 0603

47pF

CK1470AD4A

C191

CAP CER 47PF 50V 1% NP0 0402

47pF

CK1470AK4A

C192

CAP CER 47PF 50V 1% NP0 0402

47pF

CK1470AK4A

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

47

C193

CAP CER 47PF 50V 1% NP0 0402

47pF

CK1470AK4A

C62

CAP CER 47PF 50V 1% NP0 0402

47pF

CK1470AK4A

C38

CAP CER 56PF 50V 1% NP0 0603

56pF

CK1560AD4A

C183

CAP CER 1UF 16V Z Y5V 0402

1uF

CK5105AK7R

C217

CAP CER 1UF 16V Z Y5V 0402

1uF

CK5105AK7R

C106

CAP CER 10UF 6.3V 20% X5R 0402

10uF

CKC106AK6T

C120

CAP CER 10UF 6.3V 20% X5R 0402

10uF

CKC106AK6T

C124

CAP CER 10UF 6.3V 20% X5R 0402

10uF

CKC106AK6T

C168

CAP CER 10UF 6.3V 20% X5R 0402

10uF

CKC106AK6T

C257

CAP CER 10UF 6.3V 20% X5R 0402

10uF

CKC106AK6T

D3

DIODE RF SGL 50V 100MA SOD-323

BAR63

EDBAR0063Y

D1

DIODE RF SGL 50V 100MA SOD-323

BAR63

EDBAR0063Y

D7

DIODE

RB886CS

EDRB886CSY

D9

DIODE

RB886CS

EDRB886CSY

D4

SILICON SCHOTTKY BARRIER DIODE

HSM88AS

EDHSM0088A

D5

DIODE 400V 0.7A SOD-123

RR264M

EDRR00264M

D6

DIODE SWITCH 80V 100MA EMD3

DAN222

EDDAN0222Y

D8

LED GREEN/RED BICOLOR 0606 SMD

LTST-

C195KGJRKT

EX01Y40203

F1

FUSE 3A 32V 0603 FAST C2Q

C2Q 3

EX02Y40258

J2

CONN RCPT MINI USB2.0 5POS

USB

EX07N49886

J6

BATTERY CONNCETOR RIGHT ANGLE

CON4

EX07Y49885

L2

BEAD COIL

BEAD

YCBAD18592

L18

BEAD COIL

BEAD

YCBAD18592

L1

BEAD COIL

BEAD

YCBAD18592

L3

CHOKE COIL

.82uH

YCMCI8243D

L4

SPRING COIL

27nH

YCSPG18424

L9

CHOKE COIL

15nH

YCMCI1533D

L10

CHOKE COIL

15nH

YCMCI1533D

L6

CHOKE COIL

27nH

YCMCI2733D

L5

CHOKE COIL

27nH

YCMCI2733D

L8

RES 0.0 OHM 1/10W JUMP 0603

0

RCY060004ZR

L14

RES 0.0 OHM 1/10W JUMP 0603

0

RCY060004ZR

L7

RES 0.0 OHM 1/10W JUMP 0603

0

RCY060004ZR

L15

CHOKE COIL

47nH

YCWCI4733B

L11

Fixed Inductors Air Core RF Inductor 13.7 nH 5 % 2.7 A

13nH

YCSPG18426

L12

Fixed Inductors Air Core RF Inductor 13.7 nH 5 % 2.7 A

13nH

YCSPG18426

L13

Fixed Inductors Air Core RF Inductor 13.7 nH 5 % 2.7 A

13nH

YCSPG18426

L15

Fixed Inductors Air Core RF Inductor 13.7 nH 5 % 2.7 A

13nH

YCSPG18426

L17

INDUCTOR 10UH 500-MA 0603

10uH

YCTLI1064C

Q1

TR

2SK3476

TY2SK3476Z

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

48

Q2

TRANSISTOR NPN 1GHZ SOT-23

2SC3356

TY2SC3356Z

Q3

TR

2SK3475

TY2SK3475Z

Q4

TRANS PREBIAS PNP 150MW VMT3

DTA114EM

TYDTA114EM

RT1

THERMISTOR 33K OHM NTC 0402 SMD

33tk

RTU143334Y

R10

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R19

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R50

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R55

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R59

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R60

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R61

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R62

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R63

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R82

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R87

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R90

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R91

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R92

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R93

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R94

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R95

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R106

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R115

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R119

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R133

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R140

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R13

RES 10K OHM 1/16W 5% 0402 SMD

10K

RCY041034Z

R141

RES 6.8K OHM 1/16W 5% 0402 SMD

6.8K

RCY046824Z

R129

RES 6.8K OHM 1/16W 5% 0402 SMD

6.8K

RCY046824Z

R5

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R6

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R7

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R9

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R14

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R15

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R51

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R52

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R53

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R54

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R58

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R64

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

49

R65

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R66

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R67

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R69

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R71

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R74

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R81

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R85

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R86

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R97

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R100

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R111

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R118

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R135

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R137

RES 1.0K OHM 1/16W 5% 0402 SMD

1K

RCY041024Z

R73

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

R75

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

R77

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

R78

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

R80

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

C60

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

C61

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

C161

RES 0.0 OHM 1/16W 0402 SMD

0

RCY040004Z

R8

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R28

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R29

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R33

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R39

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R44

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R138

RES 100 OHM 1/16W 5% 0402 SMD

100

RCY041014Z

R11

RES 47K OHM 1/16W 5% 0402 SMD

47K

RCY044734Z

R18

RES 47K OHM 1/16W 5% 0402 SMD

47K

RCY044734Z

R45

RES 47K OHM 1/16W 5% 0402 SMD

47K

RCY044734Z

R46

RES 47K OHM 1/16W 5% 0402 SMD

47K

RCY044734Z

R121

RES 47K OHM 1/16W 5% 0402 SMD

47K

RCY044734Z

R123

RES 47K OHM 1/16W 5% 0402 SMD

47K

RCY044734Z

R12

RES 22 OHM 1/16W 5% 0402 SMD

22

RCY042204Z

R26

RES 22 OHM 1/16W 5% 0402 SMD

22

RCY042204Z

R68

RES 22 OHM 1/16W 5% 0402 SMD

22

RCY042204Z

R70

RES 22 OHM 1/16W 5% 0402 SMD

22

RCY042204Z

R32

RES 22K OHM 1/16W 5% 0402 SMD

22K

RCY042234Z

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

50

R38

RES 22K OHM 1/16W 5% 0402 SMD

22K

RCY042234Z

R57

RES 22K OHM 1/16W 5% 0402 SMD

22K

RCY042234Z

R105

RES 22K OHM 1/16W 5% 0402 SMD

22K

RCY042234Z

R109

RES 22K OHM 1/16W 5% 0402 SMD

22K

RCY042234Z

R114

RES 22K OHM 1/16W 5% 0402 SMD

22K

RCY042234Z

R16

RES 470 OHM 1/16W 5% 0402 SMD

470

RCY044714Z

R113

RES 470 OHM 1/16W 5% 0402 SMD

470

RCY044714Z

R17

RES 47 OHM 1/16W 5% 0402 SMD

47

RCY044704Z

R21

RES 47 OHM 1/16W 5% 0402 SMD

47

RCY044704Z

R40

RES 47 OHM 1/16W 5% 0402 SMD

47

RCY044704Z

R79

RES 47 OHM 1/16W 5% 0402 SMD

47

RCY044704Z

R117

RES 47 OHM 1/16W 5% 0402 SMD

47

RCY044704Z

R22

RES 2.2K OHM 1/16W 5% 0402 SMD

2K2

RCY042224Z

R41

RES 2.2K OHM 1/16W 5% 0402 SMD

2K2

RCY042224Z

R134

RES 2.2K OHM 1/16W 5% 0402 SMD

2K2

RCY042224Z

R23

RES 150 OHM 1/10W 5% 0603 SMD

150

RCY061514Z

R25

RES 560 OHM 1/16W 5% 0402 SMD

560

RCY045614Z

R27

RES 2.2M OHM 1/10W 5% 0603 SMD

2M2

RCY062254Z

R30

RES 100K OHM 1/16W 5% 0402 SMD

100K

RCY041044Z

R31

RES 100K OHM 1/16W 5% 0402 SMD

100K

RCY041044Z

R112

RES 100K OHM 1/16W 5% 0402 SMD

100K

RCY041044Z

R120

RES 100K OHM 1/16W 5% 0402 SMD

100K

RCY041044Z

R139

RES 100K OHM 1/16W 5% 0402 SMD

100K

RCY041044Z

R34

RES 120K OHM 1/16W 5% 0402 SMD

120K

RCY041244Z

R107

RES 220K OHM 1/16W 5% 0402 SMD

220K

RCY042244Z

R35

RES 470K OHM 1/16W 5% 0402 SMD

470K

RCY044744Z

R36

RES 56K OHM 1/16W 5% 0402 SMD

56K

RCY045634Z

R37

RES 10 OHM 1/16W 5% 0402 SMD

10

RCY041004Z

R2

RES 10 OHM 1/16W 5% 0402 SMD

10

RCY041004Z

R126

RES 10 OHM 1/16W 5% 0402 SMD

10

RCY041004Z

R131

RES 10 OHM 1/16W 5% 0402 SMD

10

RCY041004Z

R132

RES 10 OHM 1/16W 5% 0402 SMD

10

RCY041004Z

R127

RES 2.2 OHM 1/16W 5% 0603 SMD

2.2

RCY062294Z

R42

RES 4.7K OHM 1/16W 5% 0402 SMD

4K7

RCY044724Z

R83

RES 4.7K OHM 1/16W 5% 0402 SMD

4K7

RCY044724Z

R98

RES 4.7K OHM 1/16W 5% 0402 SMD

4K7

RCY044724Z

R116

RES 4.7K OHM 1/16W 5% 0402 SMD

4K7

RCY044724Z

R136

RES 4.7K OHM 1/16W 5% 0402 SMD

4K7

RCY044724Z

R43

RES 82K OHM 1/16W 5% 0402 SMD

82K

RCY048234Z

R76

RES 330 OHM 1/16W 5% 0402 SMD

330

RCY043314Z

R72

RES 330 OHM 1/16W 5% 0402 SMD

330

RCY043314Z

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

51

R104

RES .20 OHM 1/8W 5% 0805

0.2

RCY010294Z

R89

RES 33K OHM 1/16W 5% 0402 SMD

33K

RCY043334Z

R108

RES 33K OHM 1/16W 5% 0402 SMD

33K

RCY043334Z

R122

RES 33K OHM 1/16W 5% 0402 SMD

33K

RCY043334Z

R96

RES 3.3K OHM 1/16W 5% 0402 SMD

3K3

RCY043324Z

R110

RES 3.3K OHM 1/16W 5% 0402 SMD

3K3

RCY043324Z

R124

RES 2.2 OHM 1/16W 5% 0402 SMD

2.2

RCY042294Z

R125

RES 2.2 OHM 1/16W 5% 0402 SMD

2.2

RCY042294Z

R128

RES 2.2 OHM 1/16W 5% 0402 SMD

2.2

RCY042294Z

R130

RES 2.2 OHM 1/16W 5% 0402 SMD

2.2

RCY042294Z

SW4

PUSH SWITCH SMD

SW KEY-

YM061

EWPS33083X

U1

SINGLE CHIP RADIO TRANSCEIVER

RDA1846

YNRD01846Z

U2

IC OPAMP SNGL 1.8V R-R SC70-5

MCP6241U

YNMR6241UT

U12

IC OPAMP SNGL 1.8V R-R SC70-5

MCP6241U

YNMR6241UT

U3

IC REG LDO 5.0V .3A SOT23-5

HT7250

YNHT07250Z

U5

dPMR MODEM IC

CMX-7141

YNCM07141Q

U6

VOCODER IC

CMX-618

YNCM00618Q

U7

IC SRL SRAM 64K 3.6V 8-TSSOP

23K640

YNMR23K640

U8

IC AVR MCU 64K 64QFN

AT90USB

YNAT1286MU

U10

IC AMP HDPH/SPEAKER UNBAL 8MSOP

BH7824

YNRO07824Z

U11

IC REG BOOST ADJ 0.5A 8MLF

MIC2290

YNML02290Z

U16

LDO LINEAR REGULATOR 1.8V 300mA

HT7218

YNHT07218Z

U18

IC REG LDO 5V 0.2A SOT89-3

XC6201

YNTX1P502P

U17

IC REG LDO 5V 0.2A SOT89-3

XC6201

YNTX1P502P

Y2

TCXO 19.2MHZ 3.3V TCXO/+-0.5PPM

TXCO19.2M

EFO192000Y

JP2

BOARD TO BOARD 18X2 CONN

CONN18X2

EX07Y49871

Q5

NPN PRE BIASED TRANSISTOR

DTC114EM

TYDTC114EM

U4

FLASH MEMORY 32MBIT

AT23DF321

YNAT25321A

Y1

VC-TXCO 12.8Mhz 3V +-12/2PPM

VC-TXCO

EFO128000Y

U14

LDO LINEAR REGULATOR 3.3V 300mA

HT7233

YNHT07233Z

U15

LDO LINEAR REGULATOR 3.3V 300mA

HT7233

YNHT07233Z

U19

LDO LINEAR REGULATOR 3.3V 300mA

HT7233

YNHT07233Z

Y3

TCXO 16MHZ 3.3V TCXO/+-0.5PPM

CRYSTRAL

16Mhz

EFO160000Y

20 ST-2112 KEYBOARD & DISPLAY BOM

ITEM

QTY

DESCRIPTION

SMTK PN

1

1

KEY PCB

EPL211030Z

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

52

2

2

RESISTOR 0 ohm (0402)

RCY040004Z

3

1

RESISTOR 10 ohm (0402)

RCY041004Z

4

4

RESISTOR 330 ohm (0402)

RCY043314Z

5

1

RESISTOR 200 ohm (0402)

RCY042014Z

6

9

RESISTOR 1K (0402)

RCY041024Z

7

5

RESISTOR 2.2K (0402)

RCY042224Z

8

5

RESISTOR 4.7K (0402)

RCY044724Z

9

1

RESISTOR 22K (0402)

RCY042234Z

10

1

RESISTOR 27K (0402)

RCY042734Z

11

1

CAP. 0.1UF (0402)

CK5104AK5X

12

2

CAP. 2.2UF (0402)

CK6225AK6T

13

1

CAP. 0.33UF (0402)

CK0334AK5X

14

1

CAP. 4.7UF

CK0475AD7R

15

8

LED (0603)

EX01Y40205

16

0

FUSE 0.2A 32V (0402)

EX02Y40259

17

1

IC MIMD10A-7-F

YNDCOMD10A

18

20

TACTILE SW

EWPS33086X

19

1

PCB CONNECTOR 36P

EX07Y49872

20

1

PCB FHA8-M108000GA

EX07Y49911

21 ACCESSORY PORT:

In the side of the radio, you will find four connectors:

1 – USB: USB 2.0 compliance

2 – External mic, External PTT and RX serial data (2.5mm)

4

3

2

1

Mic (-)

RX Serial (TTL)

Mic (+)/PTT

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

54

3 – External Speaker, TX serial data (3.5mm)

4 – Accessory port

Pin

Function

Comments

GND

Ground

Main radio GND

SDA

High Speed Serial data I/O

0-3V up to 400Khz

SCL

High Speed Serial Clock

0-3V up to 400Khz

I/O 3

Digital Input/Output

1K Ohm, 0-3.3V

I/O 2

Digital Input/Output

1K Ohm, 0-3.3V

I/O 1

Digital Input/Output

1K Ohm, 0-3.3V

I/O 0

Digital Input/Output

1K Ohm, 0-3.3V

+V

Accesory power

3.3Vdc @ 200 mA

Speaker (-)

TX Serial (TTL)

Speaker (+)

8

1

ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

55

22 ST-2112 SERVICE MANUAL REVISIONS

AUTHOR

RELEASE

DATE

REMARKS

DANIEL MARTIN

1.1

JUN-2013

INITIAL RELEASE VERSION

DANIEL MARTIN

1.2

JUN-2013

ADDED SOFTWARE ZONE SPECIFICATION

Copyright 2014

Printed in Malaysia

www.smartrunk.com

ST-2112D SM R1.2