SM-2000
SERVICE MANUAL
MAXON AMERICA, Inc.
10828 N. W. Air World Drive
Kansas City, MO 64153
Phone 816-891-6320 Fax 816-891-8815
680-100-0045 Revision C ECO 98017
December 98
MAXON SM-2000 MOBILE
TABLE OF CONTENTS
TABLE OF CONTENTS
Table Of Contents....................................................i
Specifications........................................................1
Transceiver Nominal Performance ......................................1
General ...........................................................1
Transmitter ........................................................2
Tx Tone Modulation Characteristics .....................................4
Sub Audible Tones - DCS .............................................4
Receiver...........................................................4
Rx Tone Demodulation Characteristics...................................5
Accessories ........................................................5
Reliability Analysis ..................................................5
Programmer ........................................................5
Introduction ........................................................6
Unpacking Information ...............................................7
General Description ..................................................8
Description Of Controls ...............................................9
Theory Of Operation .................................................11
RF Section (SM-2150/VHF) ...........................................13
RF Section (SM-2450/UHF) ...........................................17
PLL ..............................................................20
Test Setup ..........................................................21
SM-2150/VHF Alignment Procedure ....................................22
Alignment Points Diagram (SM-2150/VHF) ..............................26
SM-2450/UHF Alignment Procedure ....................................27
Alignment Points Diagram (SM-2450/UHF) ..............................31
Component Replacement..............................................32
Surface Mount Components ...........................................32
Surface Mount Removal ..............................................32
Surface Mount Component Replacement .................................33
Surface Mounted Integrated Circuit Replacement ..........................33
Parts List Common to SM-2000 ........................................34
Electrical Parts List Main Board Digital Section (SM-2000) .................35
Electrical Parts List Band Chart (SM-2150/VHF) .........................37
Electrical Parts List Main Board (SM-2150/VHF) .........................38
Electrical Parts List Band Chart (SM-2450/UHF) .........................42
Electrical Parts List Main Board (SM-2450/UHF) .........................44
Component Pinout (SM-2000)..........................................48
Voltage Charts (SM-2150/VHF) ........................................51
Voltage Charts (SM-2450/UHF) ........................................54
Trouble Shooting Chart (SM-2000) .....................................57
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December 98
MAXON SM-2000 MOBILE
TABLE OF CONTENTS
Schematics and Block Diagrams ........................................59
SM-2150/VHF Front End Schematic ....................................59
SM-2450/UHF Front End Schematic ....................................59
SM-2000 TCXO Schematic ...........................................59
MA-4472 Microphone Schematic .......................................60
SM-2000 Control Head Schematic ......................................60
SM-2000 Block Diagram .............................................61
SM-2000 Digital Schematic ...........................................62
SM-2150/VHF RF Schematic ..........................................63
SM-2450/UHF RF Schematic ..........................................64
PCB Layouts ........................................................65
SM-2000 Control Head PCB Layout ....................................65
SM-2150/VHF PCB Layout ...........................................66
SM-2450/UHF PCB Layout ...........................................67
SM-2000 Exploded View ..............................................68
SM-2000 Exploded View Parts List .....................................69
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December 98
MAXON SM-2000 MOBILE
SPECIFICATIONS
SPECIFICATIONS
TRANSCEIVER NOMINAL PERFORMANCE
Performance Specifications ..............................FTZ 17TR2049 July 88
TIA/EIA-603
IEC 68 Series
EC 529 IP54
MIL STD 810 C,D,E
RF Output Power ......................................25 W
Modulation Type.......................................G3E/F3E (PM/FM)
Audio power ..........................................4W
Intermediate frequencies ................................45 MHz
455 kHz
Number of Channels....................................4
Frequency Source......................................Synthesizer
GENERAL
Power Supply..........................................13.2 VDC nominal CEPT
15.6 VDC maximum (extreme)
10.8 VDC minimum (extreme)
13.8 VDC nominal TIA/EIA-603
Temperature Range
Storage ...............................................
80°C Maximum; -40°C Minimum
(Extreme)
Operating (to spec) .....................................
25°C Nominal;
60°C Maximum; -30°C Minimum
(Extreme)
Current Consumption
DC Current
Standby (Muted) < 140 mA
Unmuted
25% Max. AF power
50% Max. AF power
100% Max. AF power
Transmit
1 Watt RF power
3 Watts RF power
25 Watts RF power
< 350 mA
< 450 mA
< 570 mA
1.6 A
2.4 A
6.7 A
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December 98
MAXON SM-2000 MOBILE
SPECIFICATIONS
Switching range TX and RX (without re-tuning)
Operational Bandwidth
BAND
MIN MAX MIN MAX
VHF Band 1 136 162 136 162
VHF Band 2 148 174 148 174
UHF Band 1 400 430 400 430
UHF Band 2 420 450 420 450
UHF Band 3 440 470 440 470
UHF Band 4 470 490 470 490
UHF Band 5 490 512 490 512
TX RX
Channel spacing .......................................25 kHz / 20 kHz / 12.5 kHz
programmable
(25 kHz - 12.5kHz switchable
by CPU control)
Dimensions (in/mm)....................................2(H) x 7(W) x 6.25(D)
45(H) x 157(W) x 140(D)
Weight 3lbs, 6oz/ 1.6kg (with mic)
TRANSMITTER
Tests methods are ETS 300 086 Jan
1991 unless stated
Performance Without Sub audible Modulation
Carrier Power @ nominal conditions
Max. Rated Output Power ...............................25 W +/-10% nominal
25 W +2/-3 dB @ extreme conditions
across switching range
Hi Switched by CPU ...................................
Continuously adjustable
Low Switched by CPU ..................................
Continuously adjustable
Frequency stability (SM-2150) ...........................+
Frequency stability (SM-2450) ...........................+2.5 ppm (+ 0.00025%)
Peak audio frequency deviation
(across switching range)
1–25W
1–3W
5.0 ppm (+ 0.00025%)
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December 98
MAXON SM-2000 MOBILE
SPECFICATIONS
Channel Spacing
Without sub audible tone
modulation
(kHz)
25 + 5.0 kHz + 5.0 kHz
12.5 + 2.5 kHz + 2.5 kHz
Audio characteristic ....................................(Method as FTZ 17 TR 2049 July 1988)
MOD Type G3.........................................Within +1/-3 dB of 6 dB/octave
MOD Type F3 .........................................Within +1/-3 dB of 6 dB/octave
Adjacent channel power
25 kHz
12.5 kHz
With sub audible tone modulation
@ 10% peak deviation
MAX DEV
pre-emphasis curve:
300 Hz – 2.55 kHz for 12.5 kHz
Channel Spacing
300 Hz – 3 kHz for 20 , 25 kHz
Channel Spacing
pre-emphasis curve:
300 Hz – 2.55 kHz for 12.5 kHz
Channel Spacing
300 Hz – 3 kHz for 20 , 25 kHz
Channel Spacing
<70dBc
<60dBc
TX spurious emissions (conducted)
9 kHz – 1 GHz
1 – 4.0 GHz
TX spurious emissions (radiated)
9 kHz – 1 GHz
1 – 4.0 GHz
TX spurious emissions (radiated)
9 kHz – 1 GHz
1 – 4.0 GHz
Modulation limiting characteristics .......................Method as FTZ17 TR2049 July 1988
Transmitter audio distortion (without CTCSS) ..............Method as FTZ17 TR 2049 July 1988
1 kHz modulation input < 5 %
Transmitter audio distortion (with CTCSS) .................Method as EIA RS 220A Mar 79
Audio frequency 1 kHz
Any CTCSS frequency combined
Hum & noise (residual modulation) ........................>40dB
< -36 dBm
< -30 dBm
< -36 dBm
< -30 dBm
< -36 dBm
< -30 dBm
=75% peak deviation
<8%
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December 98
MAXON SM-2000 MOBILE
SPECIFICATIONS
TX TONE MODULATION CHARACTERISTICS
Sub audible tones - CTCSS
Tone range ............................................67 – 250 Hz @ 0.3 % accuracy
Tone standard .........................................RS-220A EIA Standard
Non-standard tones.....................................50 – 260 Hz @ 0.3 % accuracy
Nominal tone deviation..................................10 % peak system deviation
SUB AUDIBLE TONES - DCS
Tone standard .........................................Normal and inverted
Nominal tone deviation..................................10 % peak system deviation
RECEIVER
Performance without sub audible modulation...............Method ETS 300-086 JAN 1991
unless stated
Sensitivity 12 dB SINAD ................................< - 118 dBm
Amplitude characteristic ................................+ 3dB
Co-channel rejection
25 kHz
12.5 kHz
Adjacent channel selectivity
25 kHz
12.5 kHz
Spurious response rejection .............................> 70 dB (100 kHz - 4 GHz)
Intermodulation response rejection
+
(25 kHz & 50 kHz)
+ (50 kHz & 100 kHz)
Blocking
+ 1 MHz
+ 5 MHz
+ 10 MHz
RX spurious emissions (conducted)
9 kHz – 1 GHz
1 GHz – 4.0 GHz
RX spurious emissions (radiated)
9 kHz – 1 GHz
1 – 4.0 GHz
<-6dB
<- 10 dB
> 70 dB @ nominal conditions
> 60 dB @ nominal conditions
> 65 dB (3 generator method)
>85dB
>85dB
>85dB
-57dBm
-47dBm
-57 dBm
-47 dBm
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December 98
MAXON SM-2000 MOBILE
SPECIFICATIONS
AF power.............................................5 W maximum @10% Distortion into a
4 ohm load. 4 Watts nominal.
AF frequency response ..................................Method as FTZ 17 TR 2049 July 1988
MOD Type G3.........................................Within +1/-3 dB of 6 dB/octave
de-emphasis curve
300 Hz – 2.55 kHz for 12.5 kHz
Channel Spacing
300 Hz – 3 kHz for 25 kHz
Channel Spacing
MOD Type F3 .........................................Within +1/-3 dB of 6 dB/octave
de-emphasis curve
300 Hz – 2.55 kHz for 12.5 kHz
Channel Spacing
300 Hz – 3 kHz for 25 kHz
Channel Spacing
RX Hum & Noise ......................................>40dB
RX TONE DEMODULATION CHARACTERISTICS
Subaudible tones - CTCSS/DCS
CTCSS tone range .....................................67 Hz to 250 Hz
CTCSS tone standard...................................RS-220A EIA Standard
CTCSS non-standard tones ..............................50 – 260 Hz
DCS tone standard .....................................Standard and inverted
Decode Sensitivity ......................................Method: Decrease signal level @ 10%
peak deviation
All tone ...............................................<= 9 dB SINAD
Environmental ........................................IEC529 level IP54 MIL STD 810C
EMC.................................................EMC Directive 89/336/EEC May 1989
ETS 300.279
ACCESSORIES
MA4472 Microphone
RELIABILITY ANALYSIS
Calculation method
MTBF................................................15,000 Hr. MIL-HDBK-217F. Ground
benign. Parts stress method.
MTTR ...............................................30 Min. (Average time to rework any
SMD component & reassemble).
PROGRAMMER
.....................................................SMP4004C
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December 98
MAXON SM-2000 MOBILE
INTRODUCTION
INTRODUCTION
Advanced state-of-the-art technology is used in the design and manufacturing of the SM-2000 Mobile. The
Phase Lock Loop (PLL) synthesizer provides more flexibility and capability in the SM-2000 Mobile. This
scanning mobile has 4 channel capability. It offers CTCSS, DCS, scanning, priority channel, and many other
functions. All these functions are controlled by the micro controller. The micro controller reads specific
channel information from an Electronically Erasable Programmable Read Only Memory (EEPROM).
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December 98
UNPACKING INFORMATION
Check the carton carefully for the following items:
1 Transceiver Unit
2 Microphone
3 DC Power Cord
4 Mobile Mounting Bracket
5 Assembly Hardware
6 Operating Guide
MAXON SM-2000 MOBILE
UNPACKING INFORMATION
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December 98
MAXON SM-2000 MOBILE
GENERAL DESCRIPTION
GENERAL DESCRIPTION
The Maxon SM-2000 is a rugged two way FM mobile radio which operates from 136-174 MHz (VHF) in
two bands & 400-512 MHz (UHF) in five bands. The SM-2000 is a synthesized radio utilizing
microcomputer technology to provide reliable high quality simplex two-way mobile communications. The
SM-2000 transmitter output power level is 25 watts over a wide bandwidth, with a receiver operational
bandwidth that covers the specified frequency band. The basic radio package includes the following
features:
Microprocessor Control
•
Synthesized RF Channel Selection (Frequency Control)
•
CTCSS Encode / Decode
•
DCS Encode / Decode
•
Priority Channel Scan
•
5 PPM Frequency Stability (SM-2150/VHF)
•
2.5 PPM Frequency Stability (SM-2450/UHF)
•
• Field Programmable with PC
Internal 4 watt speaker, with Volume Control
•
• Busy Channel Lockout
The small size of the SM-2000 radio makes it ideal for front mounting in conventional vehicles. The radio
is operated with a simple hand held microphone in combination with the operating controls described in the
following section.
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December 98
MAXON SM-2000 MOBILE
DESCRIPTION OF CONTROLS
DESCRIPTION OF CONTROLS
Figure 1 SM-2000 Front Panel
DESCRIPTION OF CONTROLS
The controls, indicators and microphone/programming connector are located on the front panel. The
Monitor and Auxiliary buttons are located on the radio’s front panel. The following table details the
Mobile controls, indicators, and connections.
TABLE 2
Controls, Indicators, And Connections
ITEM FUNCTION
1. Channel Select Switch
2. ON/OFF Volume Control
3. Microphone Connect Jack Used to connect the microphone to the mobile
4. Busy/Call/TX Tri-colored LED indicator
5. Auxiliary (AUX) Switch Used for control of after market accessories
6. Monitor Switch When pushed, monitors the chosen channel
7-10. Channel Indicator LED’s Indicates the channel when illuminated
Rotary switch, used to select one of 4 channels (max.) and to engage
scanning function
Main power switch and volume control. Fully counter clockwise is off
position
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December 98
MAXON SM-2000 MOBILE
DESCRIPTION OF CONTROLS
Rear Panel Connections
ITEM FUNCTION
1. Antenna Connector ( S0-239 ) 50 ohm connector
2. DC Power Connector
3. External Speaker Connector
Used to connect the mobile to the power supply 13.2 VDC or 13.8 VDC
U.S.A.
Multipurpose socket used to connect to a remote speaker or for test
connection
Figure 2 SM-2000 Rear Panel
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December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
THEORY OF OPERATION
Each of the Scanning Mobile radios, UHF & VHF, include a unique main P.C.B. consisting of RF, Digital
and Analog circuitry.
DIGITAL CIRCUITRY
IC 411 and IC412 are digitally-controlled analog switches which internally consist of three single pole,
double throw switches. By placing a high (5V) or low (0V) on the control lines which consists of A,B, and
C. “A” controls the X ports “B” controls the Y ports and “C” controls the Z ports. Example: A high on
control “A” would connect X to X1. A low on control “A” would connect X to X0.
CTCSS/DCS Decode Circuits
Discriminator audio from Pin 9 of IC 109 is fed to IC 406 and associated parts, which are the first 2 poles
of a 6th order 250Hz Chebeyshev low pass filter. The output from Pin 1 (IC406A) is fed into IC411 (Pin 2)
and output to Pin 15 (IC411). The signal is then fed to Pin 8 (IC407) which is a 6th order low pass
Butterworth switched capacitor filter. The output from the Butterworth filter (Pin 3 IC407) is then fed to
the remaining 4 poles of the 6th order Chebeyshev, which consist of IC 406C and one of the two
operational amplifiers internal to IC407 (MF6-100) along with associated components. Both the
Chebeyshev and the Butterworth combines for a 4dB ripple low pass filter when programmed for 250Hz.
The output of IC406C(Pin 8) is fed into the remaining operational amplifier internal to IC407 (MF6-100)
which forms the squaring circuit for the Decode signal. The signal is output from Pin 2 IC407 (MF6-100)
and fed into IC409 (micro) where it is matched with a preprogrammed frequency. If successful a Decode
occurs, which is shown by a green L.E.D. on the front panel of the UHF Scanning Mobile and audio is
heard. If valid Decode was not seen, the busy L.E.D. (Yellow) would be shown.
CTCSS/DCS Encoder Circuit
During TX encode the tone squelch digital signal is produced as a 3-bit parallel word at Pins 15 (A), 16
(B), and 18C of the micro controller (IC409). The 3-bit digital signal is converted to an analog signal by
resistors R427, 428, and 430. The analog signal is fed into IC411 Pin 1. The signal is output on Pin 15
(IC411) and fed into Pin 8 of IC407 (6th order Butterworth clock tuned low pass filter). The filtered
encode output from Pin 3 (IC407) is fed into Pin 13 (IC411) and output on Pin 14 (IC411).
The filtered encode signal is fed to IC405B and RV403 (sub-audible gain control), the output of IC405B is
then fed to the audio mixer circuit.
Channel Select Circuit
One of 4 channels may be selected using the channel switch on the front panel. The channel switch SP4T
(single pole 4 throw) with output to 4 channel LED’s and to diode’s to be converted to an inverted 4-Bit
binary code. The binary code inverted is equal to the channel number. The binary code is decoded by the
micro controller enabling the appropriate RX or TX frequency and associated data to be selected from the
EEPROM.
•
NOTE:It is possible any one of the 4 channel locations can be a scanning position. Refer to
Operators Manual for further instructions.
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December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
EEPROM
RX/TX channels, CTCSS/DCS as well as other data from the programmer are stored in the EEPROM. The
data stored is retained without power supplied. This is a non-volatile memory. The EEPROM may have
information re-programmed or erased. IC408 is an EEPROM with 2048 (256x 8) bit capacity and data is
written and read serially, with the Programming cable through the front panel microphone connector.
High Pass Filter
The high pass filter is an 8-pole .1dB chebeyshev active filter that comprises IC410 and associated
components. The de-emphasis is provided by resistor R451 and capacitor C452. Receive audio is passed
to IC410 by Pin 4 of IC411 where sub-audible tones below 250Hz are removed. Mic audio is also fed into
IC410 via IC411 (Pin 4) where sub-audible voice products below 250Hz are also removed.
Mute (Squelch) Circuit
The mute circuit which is controlled by the output of IC409 (micro) pin 77 (386) is connected to Q409 via
R438 which opens analog gate IC401D and mutes the audio path to the AF amplifier, in conjunction with
Q137 shorting the input to audio amp IC108.
TX Audio and Filter Circuits
Microphone audio from front panel (via IC412), is fed into IC401A, and into IC404B (Pin 6). The TX
audio is output on Pin 7 (IC404B) and into the high pass filter (IC410), where sub-audible voice products
are removed. The TX audio output from IC410 is fed into IC404A&B which with associated parts form a
pre-emphasis mic amplifier and limiter. The output from Pin 1 IC404A is fed to RV402 (TX Modulation
Level Adjust) and fed into IC404C&D with associated parts to form a 3kHz low pass filter. The output of
IC404D (Pin 14) is then fed into the Audio Mixer Circuit.
Audio Mixer and Inverter
IC405A is an audio mixer where audio and sub-audible tones are combined. RV403 is used as a level
control for the Sub-audible tones. This level is summed with amplified, pre-emphasized, and limited audio
and feed to IC405A, which is an inverting amplifier. The output is fed to the VCO and TCXO to provide
the necessary modulation signal.
Analog Ground Supply
IC406D supplies analog ground (2.0V) to all operational amplifier circuits except for IC405A and IC405D.
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December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
PLL
IC101 (MC1459IF) is a PLL frequency synthesizer with an on-board 1.1 GHZ divide by 64/65 dual
modulus prescaler. In addition to the prescaler and frequency counters, the synthesizer IC has a a phase
detector and a C register (Configuration register) that allows certain functions to be configured as desired.
The synthesizer is serially controlled by three wire input to the IC. Serial data is fed to pin 19 of the IC.
Serial data CLK (pin 18) and active low ENABLE (pin 17) are the input pins that allow data transfer into
the integrated circuit for control and frequency selection.
Data transfer is byte-oriented and may be shifted in 1, 2 or 3-byte patterns. One byte (8 bits) accesses the C
or configuration register, two bytes (16 bits) access the R register and 3 bytes (24 bits) access the A
register.
Internally the synthesizer has three counters used as frequency dividers. These counters are the R,A and N
counters. The R counter is actually controlled by 3 bits of the R register while the remaining 13 bits
determine the divide by R value. The frequency at pin 20 (12.8 MHz) is divided by R to determine the
frequency steps of the PLL synthesizer. In programming the radio, 5.0 kHz or 6.250 kHz step sizes can be
selected for any channel.
The 24- bit A register controls the N and A (prescaler) counts. Together these counts determine the total
synthesizer divide ratio affecting the f
values. A8-A19 are the N counter values. A21 and A20 must always be set high. A23 and A22 are both
set to 0 which controls the function of output A and causes it to be a port. This port, output A, is used to set
TX power high or low. A high output on port A sets transmit power low.
(frequency input) signal from the VCO. A0-A7 are the A counter
in
The 8-bit C register performs control functions as stated:
C7 sets polarity of the phase detector bits. Logic “0” is normal.
C6 determines the phase detector used. A logic “0” selects theta V and theta R outputs
C5 enables the lock detector when its logic is “1”.
C4 when a logic “1”, puts CMOS sections in standby mode.
C3 and C2 set phase detector current at the PD output. Not used in this application.
C1 is the value present at Output A.
C0 is the value present at Output B.
Transistors Q101 through Q104, along with related resistors and capacitors, connect the dual pin theta V
and Theta R outputs intoa2mAcurrent source that is powered by a 20V DC to DC converter. This allows
the tuning voltage to be approximately 3 to 17 VDC.
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December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
RF SECTION (SM-2150/VHF)
VHF Transmitter
The Transmitter is comprised of:
1. Microphone Audio Circuit
2. Transmitter Stage and Harmonic Filter
3. Automatic Power Control
4. Frequency Synthesizer Circuit
Microphone Audio Circuit
Microphone audio from the digital circuitry is amplified, pre-emphasized, limited, and mixed with
Sub-Audible and applied to the VCO at Pin 1, through RV101, to balance VCO and TCXO modulation.
Transmitter Stage and Harmonic Filter
When in the transmit mode of operation the diode D103 is forward biased enabling the RF signal to pass to
the pre-driver Q118 by Q116 and Q117. The amplified RF signal is amplified again by Q120. The
amplified RF signal passes through the stripline coupler and is fed to the harmonic low pass filter,
comprising of L128, L130, L131, and L132, capacitor 271, 273, 275, 277, and 283 and then to the antenna
connector (ANT). The stripline coupler provides a sample of the RF signal for the automatic power
control. During transmit D107 is forward biased which connects the power amp, D120, to the antenna.
D120 is forward biased inhibiting transmit signal power from being fed to the receiver circuitry.
Automatic Power Control
The automatic power control contains the stripline coupler, diode D107 and variable resistor VR104,
IC104A, and three transistors Q123, Q124, and Q125. IC104A forms a differential amplifier. The RF
signal present in the coupler is rectified by D107, to produce a DC voltage proportional to RF power which
is applied to Pin 3 of IC104A. TX 8.5V is also applied to the input of IC104A via the potential divider
R168, VR104, and R170 at pin 2. The different signal at output of IC104A is passed to Q124 and Q125 to
produce a constant power output to the antenna connector (ANT). VR104 is used to adjust the RF high
power level. VR105 is used to set the low power setting.
RX & TX Voltage Controlled Oscillator Circuit
The circuit contains two VCO’s. One for producing carrier frequencies during transmit and one for
producing the local oscillator frequency during receive. The circuit also has RX and TX power line filters.
RX & TX Power Line Filters
Transistors Q353 and Q354 are configured as TX5v and RX5v power supply ripple filters respectively.
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December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
RX VCO
The RX VCO comprises JFET Q351, coil L356 and varactor D353 and is configured as a Colpits oscillator.
D353 produces a change in frequency with a change in DC voltage and is controlled by the phase detector
signal present at the anode. The local oscillator signal at the drain of Q351 is applied to RF out of the
module when diode D103 is reverse biased and D104 is forward biased. L356 is used for PLL alignment.
TX VCO
The TX VCO comprises JFET Q352 coil L353 and varactor D352 and is configured as a colpits oscillator.
The AF signal at MOD port is applied to the cathode of D352. The control voltage from the loop filter is
applied to the drain of Q352 and is passed to the power amplifier and harmonic filter via the buffer Q113
and Q114. When diode D103 is forward biased and D104 is reversed biased L353 is used for PLL
alignment.
Loop Filter
Transistor Q101 to Q104 and associated components form a loop filter. The phase detector from Pin3 and
4 of IC101 are filtered to remove any reference frequency harmonics and applied to the voltage controlled
oscillator.
PLL Frequency Synthesizer
The PLL frequency synthesizer (IC101) contains an oscillator for the reference divider, a programmable
divider, a phase/frequency Comparator and an out of lock detector and a Prescaler.
Reference Oscillator
The reference oscillator of IC01 along with a 10.25 or 12.8MHz TCXO, varactor diode D701 and D702,
and the thermistors TH701, TH702, and TH703 produce a temperature compensated 10.25 or 12.8MHz
reference.
Programmable Dividers
The serial frequency data (DATA) is received by the data programmable divider at Pin 19 of IC101 from
Pin 1 of IC409 (Micro controller) out. The internal Prescaler divided input frequency at pin 11 of IC1 is
further divided by the programmable divider. The 10.25 or 12.8MHz TCXO frequency at pin 20 is the
reference divider to produce a reference frequency of 5 or 6.25kHz respectively. The internal
programmable divided frequency (Fv) and the reference frequency (Fr) are fed to the internal phase
detector.
Phase Detector
The phase detector produces negative pulses when Fv < Fr, positive pulses when Fv>Fr. When Fv = Fr and
phase is the same, the phase detector presents a high impedance at Pin 4. The signal at Pin 2 is applied to
the VCO via the loop filter.
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December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
Out of Lock Detector
The out-of-lock detector produces a high logic level when Fr and Fv are in the same phase and frequency,
low logic level pulses when the loop is out-of-lock at Pin 2 of IC101. The signals at Pin 2 of IC101 are
buffered by Q106 and then integrating by R114 and C122. The product of the integrating circuit is fed to
L/D port.
Prescaler
The internal Prescaler of IC101 divides the incoming signal frequency from the VCO via input pin 1 by 64
or 65. The divided VCO frequency is passed to the 6-stage A counter and 12-stage N counter.
Receiver
The receiver uses Dual Conversion Superheterodyning techniques, it is comprised of:
1. RF amplifier
2. First Mixer and First IF Amplifier
3. Second Mixer, Second IF Amplifier and FM Detector
4. Receiver Audio Circuit
5. Mute (squelch) Circuit
RF Amplifier
The signal received via the antenna is routed through the 9th chebyshev low-pass filters containing
capacitors C273, C275, C277, C280, C283 and coils L128, L130, L131, L132, and is passed through the
front-end module (RF amplifier) via pin 1. The front-end module contains L800 to L806 and Q800. The
front-end module is configured to enable the RF signal at the operating frequency to pass the first mixer.
First Mixer and First IF Amplifier
The VCO local oscillator signal routed through buffer transistor Q113 and Q114 is filtered by C164, C165,
C281, C310, and L110, L123. IC102 produces a difference frequency IF of 45MHz from pin 6 of the
front-end module and the filtered VCO local oscillator signal at pin 1. The 45MHz difference frequency is
filtered by the 2-pole crystal filter CF101. The tuned circuit T101 and T102 and associated components
provide matching of the crystal filter to insure good band-pass response and selectivity. The IF signal is
amplified by Q130 and passed to the second mixer, second IF and FM detector IC109.
Second Mixer, Second IF and FM Detector
A signal conversion FM receiver integrated chip, IC109 contains the second mixer, second IF and FM
detector functions. The second local oscillator frequency is determined by the crystal X101 connected to
pin 1 of IC109. The IF signal is received at pin 16 of IC109 via R203 and coupling capacitor C182. The
second IF frequency of 455kHz is produced when the different frequency is applied to the mixer via Pin 6.
The output of the second mixer via Pin 3 is applied to a 455kHz band-pass filter, CF104 for 25kHz and
CF103 for 12.5kHz channel spacing. The output of CF104 is passed to a high gain IF amplifier (limiter) in
IC109 via Pin 5. The amplified signal is coupled to the adjustable quadrature detector T103. Any detected
signal is produced at Pin 9 of IC109 and applied to the Receiver Audio Circuit and the Mute (Squelch)
Circuit.
Page-16-
December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
Receiver Audio Circuit
The receiver audio circuit is comprised of a low pass filter and an audio amplifier on the RF PCB.
Low Pass Filter
The low pass filter is configured from coil L227, capacitor C201 and resistor R206.AF signals from Pin 9
of IC109 are filtered by the low pass filter to remove any components of the 455kHz IF signal. The filtered
is passed to the high pass filter.
High Pass Filter
The de-emphasized audio signal from the high pass filter is fed to the audio amplifier (IC108).
Audio Amplifier
IC108 is the audio amplifier. The audio signal is passed to IC108. The gain of the amplifier is set by
resistor R153. The amplified audio signal at Pin 4 of IC108 is applied to the external speaker.
Mute (Squelch) Circuit
The squelch circuit switches off the audio power amplifier in the absence of audio signal. The squelch
circuit comprises a 50kHz pass band filter, squelch control (RV103) and a noise detect circuit.
The audio signal from Pin 9 of IC 109 is filtered by the 50kHz bandpass filter formed by L228, L229,
C191, C192, and C193. The noise in the IF pass band is accepted, frequencies in the voice frequency band
are rejected and noise present at the output of the filter is applied to the noise detect circuit via RV103.
RV103 is used to adjust the squelch sensitivity.
Noise Detect Circuit (SQ Board)
The noise detect circuit in conjunction with IC109 consists of transistor Q133 and Q132, thermistor TH101
and diode D125. Any noise signal present is applied to the base of Q133 of the SQ circuit from Pin 11 of
IC109. The signal is amplified by Q133 rectified by D11 and then buffered by Q132. The buffered signal
output is applied to the squelch trigger of IC109 Pin 12 via resistor R200. The squelch trigger out put (Pin
13 of IC109) is applied to the Micro controller on the Digital circuit. When noise is present, the voltage at
Pin 12 of IC109 exceeds 0.7V, the squelch trigger output is 0V (logic0) muting the receiver audio circuit.
When no noise is present the voltage at Pin 12 of IC109 is less than 0.7 and Pin 13 of IC109 is at 5V
(logic1), unmuting the audio circuit.
Page-17-
December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
RF SECTION (SM-2450/UHF)
UHF Transmitter
The Transmitter is comprised of:
1. Microphone Audio Circuit
2. Transmitter Stage and Harmonic Filter
3. Automatic Power Control
4. Frequency Synthesizer Circuit
Microphone Audio Circuit
Microphone audio is pre-emphasized, limited and mixed with sub-audible tones to provide the modulating
signal for the transmitter. This combined modulation is applied to TCXO modulation pin 1 and also to the
VCO modulation input via RV101 to effect 2-point modulation. RV101 is a modulation balance control
that equalizes modulation sensitivities of the two oscillators.
Transmitter Stage and Harmonic Filter
Power Amplifier IC103 is an RF Module. In transmit, diode D103 is forward biased allowing the RF signal
to pass to the input of IC103 via Q116 and Q117. The amplified RF output passes through the stripline
coupler and is fed to the harmonic low pass filter, consisting of spring coils L118, L120, L121 and L125
and capacitors C271, 273, 275, 277 and 280, and then to the antenna connector. The stripline coupler
provides a sample of the RF signal for automatic power control. During TX, D108 connects the power amp
to the antenna. D120 and D121 are forward biased reducing transmit signal power at the receiver input.
Automatic Power Control
The automatic power control contains the stripline coupler, diode D107, and variable resistor RV104, op
amp IC104 , and two transistors: Q124 and Q125. IC104 acts as a differential amplifier. The RF signal is
rectified by D107 to produce a DC voltage, proportional to RF power, that is applied to IC404 pin 3.
Voltage divider R168, RV104 and R170 monitors TX 8.5V dc to develop a reference for IC104A pin 2.
The difference at the output of (IC104 pin 1) is passed to Q124 and drives the collector of Q125. This
feedback controls the gain of IC103 to maintain a constant RF power output. RV104 is used to adjust the
RF high power level. RV105 is used to set the low power setting.
Frequency Synthesizer Circuit
With data received from the EEPROM ( IC408 ) the frequency synthesizer circuit controls and produces
the RF carrier frequency for the transmitter during transmit and the local oscillator frequency for the
receiver.
The frequency synthesizer circuit is comprised of:
1. RX and TX voltage controlled oscillator module.
2. Loop Filter
3. PLL Frequency Synthesizer
Page-18-
December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
Voltage Controlled Oscillator Circuit
The circuit produces carrier frequencies during transmit and local oscillator frequencies during receive.
Transistor Q107 is configured as a power supply ripple filter. The VCO utilizes transistor Q108, varactor
D101 , D102 and trimmer capacitor TC101 . These components are configured as a Colpitts oscillator.
D101 and D102 produce a change in frequency with a change in DC voltage and are controlled by the
phase detector. Q110 and Q111 are an amplifier and buffer for the output of the oscillator.
Receiver
The receive signal passes through the low pass filter, then onward to pin 1 of the Front End module. A
bandpass filter consisting of C801-C810 (see band chart for different band values) and L801-L803 is
coupled to the base of Q801 (2SC5084) which is the RF amplifier. Diode D801 serves as protection from
static and RF overload from nearby transmitters. The output of Q801 is coupled to a second bandpass filter
consisting of C812-C824 and L804-L807. The output of the Front End ( pin 6) is coupled to the double
balanced mixer IC102. The receiver Front End Module is factory pre-tuned and requires no field
adjustment. Repair is effected by replacement of the entire (properly banded) module. Frequency bands are
listed in the SPECIFICATIONS section of this manual.
The receiver Front End module pin-outs are:
1. RF Input
2. Input Ground
3. Ground
4. Receive +5VDC
5. Output Ground
6. RF Output
First Mixer
IC102 is a Double Balanced Mixer which provides a 45MHz intermediate frequency output. The filtered
frequency from the Front End is coupled to signal input pin3 of the mixer. The Local Oscillator from the
VCO module runs 45MHz lower than the receive frequency and is coupled to IC102 at pin6. The resultant
IF output exits at mixer pin2. The 45MHz IF output is matched to the input of the 4 pole monolithic crystal
filter by C179 , L119 , C172 and C173 . The crystal filter provides a bandwidth of + and - 7.5kHz from the
operating frequency for the signal providing a high degree of spurious and intermodulation protection.
Additionally, a 90MHz trap is placed at the filter input to provide additional attenuation of the second order
IMD (Intermodulation Distortion). The output of the filter is impedance matched by T101 , C175 , and
C176 to the base of the post filter IF amplifier Q130 ( MMBC1321 ).
Second Oscillator- Mixer- Limiter and FM Detector
The output of IF amplifier Q130 is coupled through C182 to the input of IC109 (Pin16), an MC3371
device. IC109 is a monolithic single-conversion FM receiver containing a mixer, the second local
oscillator, limiter and quadrature detector. The second local oscillator is crystal-controlled by X101 and
operates at 44.545 Mhz. Mixing the second L.O. with the 45.0 Mhz IF input signal provides a resultant 455
kHz signal at the second mixer output. The mixer output is then routed to CF103 (455HT) for channel
spacing of 12.5 kHz or to CF104 (455F) for channel spacing of 20 or 25kHz. These ceramic filters provide
adjacent channel selectivity for the desired bandwidths. Selection of CF103 or CF104 is software controlled
and programmable on a channel to channel basis.
Filter selection is performed by Q135, D126 and D126. The selected filter output drives a high gain
limiting amplifier that is internally coupled to the quadrature detector. Refering to the RF schematic, with
Channel Spacing low, Q135 is off and CF104 is the selected filter.
Page-19-
December 98
MAXON SM-2000 MOBILE
THEORY OF OPERATION
The quadrature detector is also configurable for narrow or wide channel spacing by software control of
Q219 and diode D127. These components with R219 parallel R211 to maintain audio output at the proper
level for the selected bandwidth.
Q134 inserts wideband squelch adjustment RV102 into the circuit whenever standard filter CF104 is
selected. This tends to broaden the filter response and provide the higher frequency noise components
needed to activate the squelch.
Squelch (Mute) Circuit
The squelch output is sent to microcontroller pin 7 after processing by the squelch circuits. The squelch
circuit consists of a double-tuned BPF (Band Pass Filter) and also a noise detector circuit. Details of these
circuits are discussed next.
Squelch Noise Band Pass Filter
The output signal from pin 9 of IC109 (MC3371) is filtered to remove the 455 kHz IF variations. The
remaining audio is then filtered by a double-tuned BPF consisting of resonator L228-C191, resonator
L229-C193 and coupling capacitor C192. The noise in the IF passband is accepted and voice frequencies
are rejected. Any noise present at the filter output is applied to the noise detector via RV103. RV103 is
used to set the squelch circuit sensitivity and is normally adjusted to produce a noise squelch opening
sensitivity of 10dB to 12dB SINAD.
Noise Detector
The noise detector operating in conjunction with IC109 consists of Q132, Q133, D125, D129, TH101 and
their associated biasing components. Noise from RV103 is amplified by an op amp within IC109. This
noise sprectrum is further amplified by Q133 and rectified by D125. This output is buffered by Q132 and
fed to the SQ IN (IC109 pin 12) through R200. When the mute is activated, (IC109 pin9) goes low to pull
the base of inverter Q131 low. Q131 collector goes high thereby signalling the microprocessor to mute the
receiver audio.
Low Pass Filter
The audio output of (IC109 pin9) is fed to a LPF (Low Pass Filter) consisting of R206 and C201. This RC
attenuates 455 kHz IF energy which normally appears at the output of the FM receiver chip. The audio is
then routed to the input of IC406A LPF for audio processing.
Speaker Audio Amplifier
After signal detection and audio filtering, the low level audio is returned to pin 1 of IC108, the Audio PA.
IC108, a TDA2003 device, provides sufficient power gain to drive the mobile speaker. Digital transistor
Q137 mutes the audio amplifier by grounding R157 when the transistor turns on. When Q137 base is high,
the transistor is on and the mobile is muted. Conversely when Q137 is off, the mute is released and audio is
heard.
Page-20-
December 98
MAXON SM-2000 MOBILE
TEST SETUP
TRANSMIT TESTS
TEST SETUP
VARIABLE POWER
SUPPLY WITH DC
VOLT/CURRENT
METER
TEST BOX
AUDIO
GENERATOR
SM-2000
POWER
METER
DUMMY LOAD
ATTENUATOR
RECEIVER TESTS
DEVIATION
METER
FREQUENCY
COUNTER
OSCILLOSCOPE
DISTORTION
ANALYZER
COMMUNICATION
MONITOR OR
FM SIGNAL
GENERATOR
PAD
SM-2000
VARIABLE
POWER
SUPPLY
SINAD
METER
AC
VTVM
OSCILLOSCOPE
DISTORTION
ANALYZER
Page-21-
December 98
MAXON SM-2000 MOBILE
SM-2150/VHF ALIGNMENT PROCEDURE
SM-2150/VHF ALIGNMENT PROCEDURE
It is important that the TCXO be on the correct frequency before performing a complete alignment of the
radio. An incorrect TCXO frequency can impair the performance and even cause mis-alignments.
Normally the transmitter is monitored with a frequency counter or service monitor while the transmitter is
keyed at it’s highest frequency. The TCXO is adjusted for the least frequency error. Typically the
frequency is 470MHz with a frequency error of +/-750Hz or less. TC701 adjusts the center frequency if
necessary.
PLL Alignment
NOTE: If the PLL is out- of- lock, an audible warning will be heard and the front panel red
•
LED will flash.
1. Connect an RF power meter to the ANT socket.
2. Using the channel switch, select channel with the lowest transmit frequency.
3. Connect a DC voltmeter to test point 1 (TP1) accessed via the hole in the VCO cover.
4. Set the PTT switch to transmit.
Note:The transmitter switching band width of this radio is 25MHz. A transmitter frequency
•
range of more than 26MHz may be programmed and used if the voltage specification in step 5 is
met.
5. Adjusting L353, set the voltage measured at TP1, measure and check that the voltage is above 2.1
volts. If the voltage is below 2.1 volts the transmitter frequency programmed is too high for the
operating bandwidth of the radio.
6. Set the PTT switch to receive.
7. Using the channel switch select channel with the lowest receive frequency.
8. Adjusting L356, set the voltage measured at TP1. Measure and check that the voltage is above 1.5
volts. If the voltage is below 1.5 volts the receive frequency programmed is too high for the
operating bandwidth of the radio.
•
Note:The receiver switching bandwidth of this radio is 26MHz. A receiver frequency range of
more than 26MHz may be programmed and used if the voltage specification in Step 8 is met.
There may be some degradation in actual receiver performance, if bandwidth of more than
26MHz is used.
Page-22-
December 98
MAXON SM-2000 MOBILE
SM-2150/VHF ALIGNMENT PROCEDURE
Receiver Alignment RF
NOTE: The Receiver front end is a pre-aligned module. There are no available field
•
adjustments.
1. Connect an RF signal generator to the ANT socket and a SINAD meter to the external speaker
jack ( J1 ) located at the rear panel.
2. Adjust RV103 to the fully open position to hear receiver noise.
3. Adjust the VOLUME control to mid position.
4. Using the channel switch, select the programmed middle receive frequency.
5. Set the RF signal generator to the same receive channel frequency.
6. Set the audio frequency to 1kHz at 3K deviation for wide band (25kHz).
6B. Set the audio frequency to 1kHz at 1.5K deviation for narrow band (12.5kHz).
7. Adjust the RF output voltage level of the RF signal generator until the 1kHz signal is heard.
NOTE: The RF output voltage level and the SINAD reading.
•
8. Adjust T102 for an improvement in SINAD.
9. Adjust the RF output voltage level of the RF signal generator keeping the SINAD meter readings
between 6dB and 12dB.
10. Adjust T101 for an improvement in SINAD.
11. Adjust the RF output voltage level of the RF signal generator keeping the SINAD meter readings
between 6dB and 12dB .
12. Check for an RF voltage signal level of 0.31uV and a SINAD meter reading of 12dB or greater.
13. Select the highest receive frequency and check for a SINAD meter reading of 12dB or greater, at
0.42uV . (Sensitivity at the operational band edge).
14. Select the lowest receive frequency and check for a SINAD meter reading of 12dB or greater, at
0.42uV.
Discriminator Tuning
1. Set the RF level to 1.0mV .
2. Adjust T103 for a maximum audio output and on the oscilloscope monitor the sinewave distortion.
Adjust T101 and T102 for lowest distortion as observed on a distortion analyzer. This is normally
less than 3%.
Page-23-
December 98
MAXON SM-2000 MOBILE
SM-2150/VHF ALIGNMENT PROCEDURE
Squelch Adjustment
1. Select a receiver channel that is programmed for narrow band (12.5 kHz) operation.
2. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at
1.5k deviation.
3. Adjust the RF output level of the RF signal generator until the 1 kHz signal is heard.
4. Adjust the RF signal to the level desired for squelch sensitivity as you monitor SINAD. This is
usually 8dB to 12dB SINAD.
5. On the main board adjust RV103 until the squelch is just unmuted (open)
6. Switch off the RF generator (squelch should close).
7. Switch on the RF generator. Squelch should open at the SINAD point where RV103 was adjusted.
This completes the narrow band adjustment.
8. Select a receiver channel that is programmed for wide band operation (25 kHz).
9. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at 3k
deviation.
10. Adjust the RF output level of the RF signal generator until the 1 kHz signal is heard.
11. Adjust the RF signal to the level desired for squelch sensitivity as you monitor SINAD. This is
usually 8dB to 12dB SINAD.
12. On the main board adjust RV102 until the squelch is just unmuted (open).
13. Switch off the RF generator (squelch should close).
14. Switch on the RF generator. Squelch should open at the SINAD point where RV102 was
adjusted.
15. Disconnect the test equipment.
Automatic Power Adjustment
•
Continuous transmit periods longer than 5 minutes are to be avoided.
1. Connect the antenna output to a RF power meter or service monitor.
2. Set the PTT switch to the ON position.
3. Adjust the variable resistor RV104 to give the appropriate transmit power. Normally this is
25watts.
4. Set the PTT switch to the OFF position.
5. Select a channel programmed to low transmit power.
6. Set PTT to ON and adjust RV105 for desired low power.
7. Set PTT to OFF.
Page-24-
December 98
MAXON SM-2000 MOBILE
SM-2150/VHF ALIGNMENT PROCEDURE
CTCSS/DCS Deviation Adjustment
Note:The following adjustment should be preset with factory alignment. If an adjustment must
•
be made the following procedures must be followed:
1. Program the radio with a 67.0Hz tone on one channel and 250.3Hz on another channel.
2. Connect a power meter and modulation meter to the radio antenna jack.
3. Adjust RV101 to the center of its adjustment.
Note:Release the PTT button when changing channels.
•
4. Alternately select the channel with tone 250.3Hz and the channel with tone 67Hz. Key up and
note the level for each. If necessary, adjust RV101 until a balance occurs between tone 250.3Hz
and tone 67Hz.
Note:This adjustment also sets DCS balance even if a DCS tone is not programmed at this time.
•
5. Select tone 250.3Hz or tone 67Hz and adjust RV403 for the tone level, typically between 500Hz
to 1kHz.
6. Release the PTT button.
Modulation Deviation Adjustment
1. Connect a power meter and a coupler to the radio.
2. Connect an AF generator to the test box.
3. Set the audio output to 30mV and the audio frequency to 1kHz .
4. Using the channel switch, select the highest transmit channel that does not have CTCSS or DCS
programmed.
5. Press and hold the PTT switch.
6. Adjust RV402 for 90% of maximum, system deviation.
6a. Adjust RV402 for 2.25kHz for narrow band (12.5kHz).
6b. Adjust RV402 for 4.5kHz for wide band (25kHz).
7. Using the channel switch, select the lowest transmit channel that does not have CTCSS or DCS
programmed.
8. Press and hold the PTT switch.
9. Measure and check that the deviation is not below 3.8k . If the deviation is below 3.8k, adjust
RV402 to 3.8k .
10. Return to highest transmit channel having a sub- audible tone and verify deviation does not exceed
5k.
11. At the channel that highest deviation is found, sweep the audio frequency between 300kHz and
3kHz . Adjust RV402 to ensure deviation is below peak system deviation at all frequencies.
12. Set the PTT switch to the OFF position.
December 98
Page-25-
MAXON SM-2000 MOBILE
ALIGNMENT POINTS DIAGRAM (SM-2150/VHF)
ALIGNMENT POINTS DIAGRAM (SM-2150/VHF)
RV105
TX LOW POWER
T101
T102
ANT
RV104
TX HI POWER
T103
DISCRIMINATOR
SQUELCH 25 KHzCH/SP
SQUELCH 12.5 KHz CH/SP
RV102
L356
RV103
L353
TP1
TC701
TCXO1
RV403
DCS
RV101
CTCSS
Page-26-
December 98
RV402
MODULATION
MAXON SM-2000 MOBILE
SM-2450/UHF ALIGNMENT PROCEDURE
SM-2450/UHF ALIGNMENT PROCEDURE
It is important that the TCXO be on the correct frequency before performing a complete alignment of the
radio. An incorrect TCXO frequency can impair the performance and even cause mis-alignments.
Normally the transmitter is monitored with a frequency counter or service monitor while the transmitter is
keyed at its highest frequency. The TCXO is adjusted for the least frequency error. Typically the frequency
is 470MHz with a frequency error of +/- 750Hz or less. TC701 adjusts the center frequency if necessary.
PLL Alignment
NOTE: If the PLL is out- of- lock, an audible warning will be heard and the front panel red
•
LED will flash.
1. Connect an RF power meter to the ANT jack.
2. Using the channel switch, select the channel with the highest transmit frequency.
3. Connect a DC voltmeter to test point 1 ( TP1 ), accessed via the hole in the VCO cover.
4. Set the PTT switch to transmit.
5. Adjusting TC101 , set the voltage measured at TP1 to 12.0 (+/- 0.05) volts.
6. Release the PTT switch.
7. Using the channel switch, select the channel with the lowest receive frequency.
8. At TP1 measure and check that the voltage is 1.4 volts or more. If the voltage is below 1.4 volts
the VCO may not lock because the lowest RX frequency is programmed too far below the TX
frequency.
Receiver Alignment RF
• NOTE: The Receiver front end is a pre-aligned module. There are no available field
adjustments.
1. Connect an RF signal generator to the ANT socket and a SINAD meter to the external speaker
jack ( J1 ) located at the rear panel.
2. Adjust RV103 to the fully open position to hear receiver noise.
3. Adjust the VOLUME control to mid position.
4. Using the channel switch, select the programmed middle receive frequency.
5. Set the RF signal generator to the same receive channel frequency.
6. Set the audio frequency to 1kHz at 3K deviation for wide band (25kHz).
6B. Set the audio frequency to 1kHz at 1.5K deviation for narrow band (12.5kHz).
7. Adjust the RF output voltage level of the RF signal generator until the 1kHz signal is heard.
•
NOTE: The RF output voltage level and the SINAD reading.
8. Adjust T102 for an improvement in SINAD.
9. Adjust the RF output voltage level of the RF signal generator keeping the SINAD meter readings
between 6dB and 12dB .
10. Adjust T101 for an improvement in SINAD.
Page-27-
December 98
MAXON SM-2000 MOBILE
SM-2450/UHF ALIGNMENT PROCEDURE
11. Adjust the RF output voltage level of the RF signal generator keeping the SINAD meter readings
between 6dB and 12dB .
12. Check for an RF voltage signal level of 0.31uV and a SINAD meter reading of 12dB or greater.
13. Select the highest receive frequency and check for a SINAD meter reading of 12dB or greater, at
0.42uV . (Sensitivity at the operational band edge).
14. Select the lowest receive frequency and check for a SINAD meter reading of 12dB or greater, at
0.42uV.
Discriminator Tuning
1. Set the RF level to 1.0mV .
2. Adjust T103 for a maximum audio output and on the oscilloscope monitor the sinewave distortion.
Adjust T101 and T102 for lowest distortion as observed on a distortion analyzer. This is normally
less than 3%.
Squelch Adjustment
1. Select a receiver channel that is programmed for narrow band (12.5 kHz) operation.
2. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at
1.5k deviation.
3. Adjust the RF output level of the RF signal generator until the 1 kHz signal is heard.
4. Adjust the RF signal to the level desired for squelch sensitivity as you monitor SINAD. This is
usually 8dB to 12dB SINAD.
5. On the main board adjust RV103 until the squelch is just unmuted (open)
6. Switch off the RF generator (squelch should close).
7. Switch on the RF generator. Squelch should open at the SINAD point where RV103 was adjusted.
This completes the narrow band adjustment.
8. Select a receiver channel that is programmed for wide band operation (25 kHz).
9. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at 3k
deviation.
10. Adjust the RF output level of the RF signal generator until the 1 kHz signal is heard.
11. Adjust the RF signal to the level desired for squelch sensitivity as you monitor SINAD. This is
usually 8dB to 12dB SINAD.
12. On the main board adjust RV102 until the squelch is just unmuted (open).
13. Switch off the RF generator (squelch should close).
14. Switch on the RF generator. Squelch should open at the SINAD point where RV102 was
adjusted.
15. Disconnect the test equipment.
Page-28-
December 98
MAXON SM-2000 MOBILE
SM-2450/UHF ALIGNMENT PROCEDURE
Automatic Power Adjustment
NOTE: Continuous transmit periods longer than 5 minutes are to be avoided.
•
1. Connect the antenna output to an RF power meter or service monitor.
2. Set the PTT switch to the ON position.
3. Adjust the Variable resistor RV104 to give the appropriate transmit power. Nominally this is
25watts .
4. Set the PTT switch to the OFF position.
5. Select a channel programmed to low transmit power.
6. Set PTT to ON and adjust RV105 for desired low power .
7. Set PTT to OFF.
CTCSS/DCS Deviation Adjustment
NOTE: The following adjustment should be preset with factory alignment. If an adjustment
•
must be made the following procedures must be followed:
1. Program the radio with a 67.0Hz tone on one channel and 250.3Hz on another channel.
2. Connect a power meter and modulation meter to the radio antenna jack.
3. Adjust RV101 to the center of its adjustment.
• Note: Release the PTT button when changing channels.
4. Alternately select the channel with tone 250.3Hz and the channel with tone 67Hz . Key up and
note the level for each. If necessary, adjust RV101 until a balance occurs between tone 250.3Hz
and tone 67Hz .
•
Note:This adjustment also sets DCS balance even if a DCS tone is not programmed at this time.
5. Select tone 250.3Hz or tone 67Hz and adjust RV403 for the tone level, typically between 500Hz
to 1kHz.
6. Release the PTT button.
Page-29-
December 98
MAXON SM-2000 MOBILE
SM-2450/UHF ALIGNMENT PROCEDURE
Modulation Deviation Adjustment
1. Connect a power meter and a coupler to the radio.
2. Connect an AF generator to the test box.
3. Set the audio output to 30mV and the audio frequency to 1kHz .
4. Using the channel switch, select the highest transmit channel that does not have CTCSS or DCS
programmed.
5. Press and hold the PTT switch.
6. Adjust RV402 for 90% of maximum, system deviation.
6a. Adjust RV402 for 2.25kHz for narrow band (12.5kHz).
6b. Adjust RV402 for 4.5kHz for wide band (25kHz).
7. Using the channel switch, select the lowest transmit channel that does not have CTCSS or DCS
programmed.
8. Press and hold the PTT switch.
9. Measure and check that the deviation is not below 3.8k . If the deviation is below 3.8k, adjust
RV402 to 3.8k .
10. Return to highest transmit channel having a sub- audible tone and verify deviation does not exceed
5k.
11. At the channel that highest deviation is found, sweep the audio frequency between 300kHz and
3kHz . Adjust RV402 to ensure deviation is below peak system deviation at all frequencies.
12. Set the PTT switch to the OFF position.
Page-30-
December 98
MAXON SM-2000 MOBILE
ALIGNMENT POINTS DIAGRAM (SM-2450/UHF)
ALIGNMENT POINTS DIAGRAM (SM-2450/UHF)
TX HI PWR
RV104
RV105
TX LO PWR
T101
T102
T103
DISCRIMINATOR
TP1
SQUELCH 12.5 kHz CH/SP
SQUELCH 25 kHz CH/SP
RV103
RV102
TC101
CNTR FREQ
TC701
RV101
CTCSS
DCS
RV403
J1
Page-31-
December 98
RV402
TX DEVIATION
MAXON SM-2000 MOBILE
COMPONENT REPLACEMENT
COMPONENT REPLACEMENT
SURFACE MOUNT COMPONENTS
Surface mount components should always be replaced using a temperature controlled soldering system.
The soldering tools may be either a temperature controlled soldering iron or a temperature controlled
hot-air soldering station. A hot-air system is recommended for the removal of components on these boards.
With either soldering system, a temperature of 700° F (371° C) should be maintained.
The following procedures outline the removal and replacement of surface mount components. If a hot-air
soldering system is employed, see the manufacturer’s operating instructions for detailed information on the
use of your system.
CAUTION: Avoid applying heat to the body of any surface mount component using standard
•
soldering methods. Heat should be applied only to the metalized terminals of the components.
Hot-air systems do not damage the components since the heat is quickly and evenly distributed to
the external surface of the component.
CAUTION: The CMOS Integrated Circuit devices used in this equipment can be destroyed by
•
static discharges. Before handling one of these devices, service technicians should discharge
themselves by touching the case of a bench test instrument that has a 3-prong power cord
connected to an outlet with a known good earth ground. When soldering or desoldering a CMOS
device, the soldering equipment should have a known good earth ground.
SURFACE MOUNT REMOVAL
1. Grip the component with tweezers or small needle nose pliers.
2. Alternately heat the metalized terminal ends of the surface mount component with the soldering iron. If
a hot-air system is used, direct the heat to the terminals of the component. Use extreme care with the
soldering equipment to prevent damage to the printed circuit board (PCB) and the surrounding
components.
3. When the solder on all terminals is liquefied, gently remove the component. Excessive force may
cause the PCB pads to separate from the board if all solder is not completely liquefied.
4. It may be necessary to remove excess solder using a vacuum de-soldering tool or Solder wick . Again,
use great care when de-soldering or soldering on the printed circuit boards. It may also be necessary to
remove the epoxy adhesive that was under the surface mount component and any flux on the printed
circuit board.
Page-32-
December 98
MAXON SM-2000 MOBILE
COMPONENT REPLACEMENT
SURFACE MOUNT COMPONENT REPLACEMENT
1. “Tin” one terminal end of the new component and the corresponding pad of the PCB. Use as little
solder as possible.
2. Place the component on the PCB pads, observing proper polarity for capacitors, diodes, transistors, etc.
3. Simultaneously touch the “tinned” terminal end and the “tinned” pad with the soldering iron. Slightly
press the component down on the board as the solder liquefies. Solder all terminals, allowing the
component time to cool between each application of heat. Do not apply heat for an excessive length of
time and do not use excessive solder.
With a hot-air system, apply hot air until all “tinned” areas are melted and the component is seated in place.
It may be necessary to slightly press the component down on the board. Touch-up the soldered connections
with a standard soldering iron if needed. Do not use excessive solder.
CAUTION: Some chemicals may damage the internal and external plastic parts of the radio.
•
4. Allow the component and the board to cool and then remove all flux from the area using alcohol or
another approved flux remover.
SURFACE MOUNTED INTEGRATED CIRCUIT REPLACEMENT
Soldering and de-soldering techniques of the surface mounted IC’s are similar to the above outlined
procedures for the surface mounted chip components. Use extreme care and observe static precautions
when removing or replacing the defective (or suspect) IC’s. This will prevent any damage to the printed
circuit board or the surrounding circuitry.
The hot-air soldering system is the best method of replacing surface mount IC’s. The IC’s can easily be
removed and installed using the hot-air system. See the manufacturer’s instructions for complete details on
tip selection and other operating instructions unique to your system.
If a hot-air system is not available, the service technician may wish to clip the pins near the body of the
defective IC and remove it. The pins can then be removed from the PCB with a standard soldering iron and
tweezers, and the new IC installed following the Surface Mount Component Replacement procedures. it
may not be necessary to “tin” all (or any) of the IC pins before the installation process.
Page-33-
December 98
MAXON SM-2000 MOBILE
PARTS LIST COMMON TO SM-2000
PARTS LIST COMMON TO SM-2000
REF #
650-100-0002 TCXO PCB ASSY. (SEE NOTE 1)
650-090-0003 MA-4472 MIC ASSY. (SEE NOTE 1)
DESCRIPTION PART #
REF # DESCRIPTION PART #
650-050-0003 CONTROL HEAD PCB ASSY.
CON1 HEADER PIN Z422-492-1
CON801 JACK MODULAR 420-709-9
C801 CHIP CERAMIC 47PF 134-722-1Z
C802 CHIP CERAMIC 47PF 134-722-1Z
C803 CHIP CERAMIC 47PF 134-722-1Z
C804 CHIP CERAMIC 47PF 134-722-1Z
C805 CHIP CERAMIC 47PF 134-722-1Z
C806 CHIP CERAMIC 47PF 134-722-1Z
C807 CHIP CERAMIC 47PF 134-722-1Z
C808 CHIP CERAMIC 47PF 134-722-1Z
C809 CHIP CERAMIC 47PF 134-722-1Z
C815 DISK CERAMIC (FOR SP1) 470PF 134-710-8
C821 CHIP CERAMIC 0.001UF 130-A17-6Z
C823 ELECT CAPACITOR 10UF 101-025-9
D801 DIODE SI CHIP KDS193 243-052-6
D802 DIODE SI CHIP KDS193 243-052-6
D803 DIODE SI CHIP KDS193 243-052-6
D804 DIODE SI CHIP KDS184S 243-051-5
D807 DIODE ZENER 241-099-9
D808 DIODE ZENER 241-099-9
D810 DIODE ZENER 241-099-9
D811 DIODE ZENER 241-099-9
LED1 LED LAMP GRN 3 V 75MW 251-160-3
LED2 LED LAMP GRN 3 V 75MW 251-160-3
LED3 LED LAMP GRN 3 V 75MW 251-160-3
LED4 LED LAMP GRN 3 V 75MW 251-160-3
LED5 LED LAMP RED/GRN 3 V 251-168-1
Q821 TRANSISTOR 202-106-5
Q822 TRANSISTOR 202-106-5
R801 CHIP RESISTOR 470 OHM 060-471-0Z
R821 CHIP RESISTOR 22 OHM 060-220-0Z
R822 CHIP RESISTOR 4.7K 060-472-1Z
SP1 SPEAKER 4 OHM 420-108-4A
SW3 SW PUSH 432-063-7
SW4 TACT SWITCH 436-038-8
SW405 SW ROTARY 430-070-5
VR801 VR 20KA 450-523-5
HOLDER(LED) 892-390
HOLDER(LED) 892-540
P.C.B. CONTROL HEAD 416-988-C
NOTES:
1. Components are not available, assembly is non-repairable.
Page-34-
December 98
650-000-0001 SM-2150/VHF MAIN BOARD
DIGITAL SECTION
Digital Parts Common on Both VHF & UHF
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
REF #
C401 CHIP CERAMIC 0.001UF 130-A17-6Z
C402 CHIP CERAMIC 0.22UF 130-270-7Y
C403 CHIP CERAMIC 0.01UF 130-172-2Z
C404 ELECT CAPACITOR 10UF 101-025-9
C405 CHIP CERAMIC 220PF 132-220-2Z
C406 CHIP CERAMIC 220PF 132-220-2Z
C407 ELECT CAPACITOR 10UF 101-025-9
C408 CHIP CERAMIC 0.033UF 130-314-5Z
C409 CHIP CERAMIC 0.0068UF 130-602-4Y
C410 CHIP CERAMIC 47PF 134-722-1Z
C411 CHIP CERAMIC 0.1UF 130-170-0Y
C412 CHIP CERAMIC 0.015UF 130-A44-0Y
C413 CHIP CERAMIC 47PF 134-722-1Z
C414 CHIP CERAMIC 0.047UF 130-424-0Z
C415 CHIP CERAMIC 220PF 132-220-2Z
C416 CHIP CERAMIC 0.01UF 130-172-2Z
C417 CHIP CERAMIC 0.0047UF 134-719-7Z
C418 CHIP CERAMIC 0.022UF 130-263-1Z
C419 CHIP CERAMIC 0.0018UF 130-A22-0Z
C420 CHIP CERAMIC 470PF 134-761-4Z
C421 CHIP CERAMIC 470PF 134-761-4Z
C422 CHIP CERAMIC 220PF 132-220-2Z
C423 CHIP CERAMIC 220PF 132-220-2Z
C424 CHIP CERAMIC 220PF 132-220-2Z
C425 CHIP CERAMIC 0.1UF 130-A60-4Y
C426 CHIP CERAMIC 0.022UF 130-263-1Z
C428 CHIP CERAMIC 0.01UF 130-172-2Z
C429 CHIP CERAMIC 47PF 134-722-1Z
C430 CHIP CERAMIC 0.1UF 130-A60-4Y
C431 CHIP CERAMIC 0.0033UF 130-315-6Z
C432 CHIP CERAMIC 0.68UF 130-624-4
C433 CHIP CERAMIC 0.082UF 130-808-4Y
C434 CHIP CERAMIC 120PF 131-107-9Z
C435 ELECT CAPACITOR 1UF 101-006-2
C436 CHIP CERAMIC 0.1UF 130-170-0Y
C437 CHIP CERAMIC 0.1UF 130-A60-4Y
C438 ELECT CAPACITOR 10UF 101-025-9
C440 CHIP CERAMIC 15PF 131-511-0Z
C441 CHIP CERAMIC 15PF 131-511-0Z
C442 CHIP CERAMIC 0.047UF 130-424-0Z
C443 CHIP CERAMIC 0.047UF 130-424-0Z
C445 CHIP CERAMIC 0.033UF 130-314-5Z
C446 CHIP CERAMIC 0.033UF 130-314-5Z
C447 CHIP CERAMIC 0.033UF 130-314-5Z
C448 CHIP CERAMIC 0.033UF 130-314-5Z
DESCRIPTION PART #
REF # DESCRIPTION PART #
C450 CHIP CERAMIC 0.047UF 130-424-0Z
C452 CHIP TANTALUM 1UF 141-036-1Z
C453 CHIP CERAMIC 0.01UF 130-172-2Z
C454 CHIP TANTALUM 1UF 141-036-1Z
C455 CHIP CERAMIC 0.033UF 130-314-5Z
C456 CHIP CERAMIC 0.001UF 130-A17-6Z
C457 CHIP CERAMIC 0.047UF 130-424-0Z
C458 CHIP CERAMIC 0.01UF 130-172-2Z
C460 CHIP CERAMIC 0.1UF 130-170-0Y
C464 CHIP CERAMIC 0.033UF 130-314-5Z
C550 CHIP CERAMIC 18PF 131-816-6Z
C551 CHIP CERAMIC 18PF 131-816-6Z
C552 CHIP CERAMIC 0.01UF 130-172-2Z
C553 CHIP CERAMIC 0.01UF 130-172-2Z
C554 CHIP CERAMIC 0.01UF 130-172-2Z
C555 CHIP CERAMIC 0.01UF 130-172-2Z
C558 ELECT CAPACITOR 10UF 101-025-9
C559 CHIP CERAMIC 0.01UF 130-172-2Z
CON403 PROG CONNECTOR 421-677-7
CON404 OPTION BOARD CONNECTOR 422-746-1
D401 DIODE SI CHIP 243-051-5
D402 DIODE SWITCHING 243-063-6
D551 DIODE SI CHIP 243-049-4
D552 DIODE SI CHIP 243-049-4
IC401 I.C. 223-224-9
IC402 I.C. REGULATOR 220-378-0
IC404 I.C. OP AMP 222-018-5
IC405 I.C. OP AMP 231-064-4
IC406 I.C. OP AMP 222-018-5
IC407 I.C. 231-073-3
IC408 I.C. EEPROM 229-463-8A
IC409 I.C. 220-130-2
IC410 I.C. OP AMP 222-018-5
IC411 I.C. 223-261-2
IC412 I.C. 223-261-2
Q131 TRANSISTOR 202-095-8Z
Q401 TRANSISTOR 202-095-8Z
Q402 TRANSISTOR 202-095-8Z
Q403 TRANSISTOR 202-095-8Z
Q404 TRANSISTOR 202-095-8Z
Q405 TRANSISTOR 202-095-8Z
Q406 TRANSISTOR 202-095-8Z
Q407 BRT 202-091-4
Q409 TRANSISTOR 202-095-8Z
Q504 TRANSISTOR 202-106-5
Page-35-
December 98
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
DIGITAL SECTION (continued)
Digital Parts Common on Both VHF & UHF
REF #
Q550 TRANSISTOR 202-113-1
Q551 TRANSISTOR 202-113-1
Q552 TRANSISTOR 202-113-1
Q553 TRANSISTOR 202-113-1
R186 CHIP RESISTOR 47K 060-473-2Z
R401 CHIP RESISTOR 680K 060-684-6Z
R402 CHIP RESISTOR 47K 060-473-2Z
R403 CHIP RESISTOR 10K 060-103-8Z
R404 CHIP RESISTOR 56K 060-563-0Z
R405 CHIP RESISTOR 7.5K 060-752-4Z
R406 CHIP RESISTOR 18K 060-183-0Z
R407 CHIP RESISTOR 330K 060-334-0Z
R408 CHIP RESISTOR 3.3K 060-332-8Z
R410 CHIP RESISTOR 220K 060-224-4Z
R411 CHIP RESISTOR 100K 060-104-9Z
R412 CHIP RESISTOR 39K 060-393-3Z
R414 CHIP RESISTOR 8.2K 060-822-4Z
R415 CHIP RESISTOR 8.2K 060-822-4Z
R416 CHIP RESISTOR 220K 060-224-4Z
R417 CHIP RESISTOR 8.2K 060-822-4Z
R418 CHIP RESISTOR 8.2K 060-822-4Z
R419 CHIP RESISTOR 47K 060-473-2Z
R420 CHIP RESISTOR 10K 060-103-8Z
R421 CHIP RESISTOR 10K 060-103-8Z
R422 CHIP RESISTOR 43K 060-433-6Z
R423 CHIP RESISTOR 47K 060-473-2Z
R424 CHIP RESISTOR 560 060-561-8Z
R425 CHIP RESISTOR 10K 060-103-8Z
R426 CHIP RESISTOR 47K 060-473-2Z
R427 CHIP RESISTOR 39K 060-393-3Z
R428 CHIP RESISTOR 20K 060-203-5Z
R429 CHIP RESISTOR 100K 060-104-9Z
R430 CHIP RESISTOR 10K 060-103-8Z
R431 CHIP RESISTOR 22K 060-223-3Z
R433 CHIP RESISTOR 47K 060-473-2Z
R434 CHIP RESISTOR 47K 060-473-2Z
R435 CHIP RESISTOR 47K 060-473-2Z
R436 CHIP RESISTOR 22K 060-223-3Z
R437 CHIP RESISTOR 4.7K 060-472-1Z
R438 CHIP RESISTOR 4.7K 060-472-1Z
R439 CHIP RESISTOR 47K 060-473-2Z
R440 CHIP RESISTOR 1M 060-105-0Z
R441 CHIP RESISTOR 43K 060-433-6Z
R442 CHIP RESISTOR 33K 060-333-9Z
R443 CHIP RESISTOR 20K 060-203-5Z
R444 CHIP RESISTOR 220K 060-224-4Z
R445 CHIP RESISTOR 120K 060-124-6Z
R446 CHIP RESISTOR 82K 060-823-5Z
DESCRIPTION PART #
REF # DESCRIPTION PART #
R447 CHIP RESISTOR 120K 060-124-6Z
R448 CHIP RESISTOR 220K 060-224-4Z
R449 CHIP RESISTOR 820 060-821-3Z
R450 CHIP RESISTOR 22K 060-223-3Z
R451 CHIP RESISTOR 2.2K 060-222-2Z
R452 CHIP RESISTOR 1M 060-105-0Z
R453 CHIP RESISTOR 3K 060-302-1Z
R454 CHIP RESISTOR 4.7K 060-472-1Z
R455 CHIP RESISTOR 3.6K 060-362-5Z
R456 CHIP RESISTOR 27K 060-273-8Z
R457 CHIP RESISTOR 47K 060-473-2Z
R458 CHIP RESISTOR 47K 060-473-2Z
R459 CHIP RESISTOR 2.4K 060-242-0
R460 CHIP RESISTOR 470 060-471-0Z
R461 CHIP RESISTOR 470 060-471-0Z
R462 CHIP RESISTOR 47K 060-473-2Z
R463 CHIP RESISTOR 47K 060-473-2Z
R464 CHIP RESISTOR 47K 060-473-2Z
R465 CHIP RESISTOR 47K 060-473-2Z
R466 CHIP RESISTOR 100K 060-104-9Z
R469 CHIP RESISTOR 10K 060-103-8Z
R470 CHIP RESISTOR 30K 060-303-2Z
R471 CHIP RESISTOR 36K 060-363-6Z
R472 CHIP RESISTOR 30K 060-303-2Z
R473 CHIP RESISTOR 4.7K 060-472-1Z
R474 CHIP RESISTOR 360K 060-364-7
R490 CHIP RESISTOR 47K 060-473-2Z
R550 CHIP RESISTOR 7.5K 060-752-4Z
R551 CHIP RESISTOR 27K 060-273-8Z
R552 CHIP RESISTOR 27K 060-273-8Z
R553 CHIP RESISTOR 7.5K 060-752-4Z
R554 CHIP RESISTOR 2.2K 060-222-2Z
R555 CHIP RESISTOR 4.7K 060-472-1Z
R556 CHIP RESISTOR 2.2K 060-222-2Z
R559 CHIP RESISTOR 470 060-471-0Z
RLK3 CHIP RESISTOR 0 060-000-8Z
RLK4 CHIP RESISTOR 0 060-000-8Z
RLK5 CHIP RESISTOR 0 060-000-8Z
RLK7 CHIP RESISTOR 0 060-000-8Z
RLK8 CHIP RESISTOR 0 060-000-8Z
RLK10 CHIP RESISTOR 0 060-000-8Z
RLK11 CHIP RESISTOR 0 060-000-8Z
RLK12 CHIP RESISTOR 0 060-000-8Z
RLK13 CHIP RESISTOR 0 060-000-8Z
RLK14 CHIP RESISTOR 0 060-000-8Z
RV402 RES.CHIP SEMIFIXED 22K 067-223-8Y
RV403 RES.CHIP SEMIFIXED 47K 067-473-7Y
X401 CRYSTAL 262-228-0Z
Page-36-
December 98
BAND CHART
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
SM-2150L VHF BAND 1 (136-162 MHz)
REF # DESCRIPTION PART #
FRONT-END PCB ASSEMBLY 650-110-0011
MAIN BOARD PARTS
C155 CHIP CERAMIC 4PF 134-007-7Y
C160 CHIP CERAMIC 24PF 132-407-5Y
C164 CHIP CERAMIC 18pF 131-816-6Y
C165 CHIP CERAMIC 9pF 139-003-8Y
C245 CHIP CERAMIC 5PF 135-010-4Y
C248 CHIP CERAMIC 27PF 132-714-2Y
C249 CHIP CERAMIC 20PF 132-012-1Y
C253 CHIP CERAMIC 75PF 137-504-4Y
C254 CHIP CERAMIC 33PF 133-336-9Y
C269 CHIP CERAMIC 9PF 139-003-8Y
C270 CHIP CERAMIC 4PF 134-013-2Y
C273 CHIP CERAMIC 43PF 134-302-2Y
C275 CHIP CERAMIC 47PF 134-773-5Y
C277 CHIP CERAMIC 43PF 134-302-2Y
C278 CHIP CERAMIC 82PF 138-216-9Z
C280 CHIP CERAMIC 24PF 132-408-6Y
C281 CHIP CERAMIC 36pF 133-611-7Y
C283 CHIP CERAMIC 18PF 131-829-8Y
C354 CHIP CERAMIC 39PF 133-932-7Y
C356 CHIP CERAMIC 4PF 134-007-7Y
C357 CHIP CERAMIC 4.7PF 134-767-0Y
C358 CHIP CERAMIC 4.7PF 134-767-0Y
C365 CHIP CERAMIC 16PF 131-603-0
C367 CHIP CERAMIC 3.3PF 133-321-5Y
C368 CHIP CERAMIC 3.3PF 133-321-5Y
L353 COIL CORE CHIP 311-117-4
L356 COIL CORE CHIP 311-117-4
R182 CHIP RESISTOR 120 OHM 060-121-4Z
SM-2150H VHF BAND 2 (148-174 MHz)
REF # DESCRIPTION PART #
FRONT-END PCB ASSEMBLY 650-110-0002
MAIN BOARD PARTS
C155 CHIP CERAMIC 11PF 131-103-5Y
C160 CHIP CERAMIC 24PF 132-407-5Y
C164 CHIP CERAMIC 24PF 132-407-5Y
C165 CHIP CERAMIC 16PF 131-603-0
C245 CHIP CERAMIC 8PF 138-004-4Y
C248 CHIP CERAMIC 27PF 132-714-2Y
C249 CHIP CERAMIC 18PF 131-816-6Y
C253 CHIP CERAMIC 75PF 137-504-4Y
C254 CHIP CERAMIC 43PF 134-302-2Y
C269 CHIP CERAMIC 2.7PF 132-725-2Y
C270 CHIP CERAMIC 6PF 136-015-4Y
C273 CHIP CERAMIC 51PF 135-106-8Y
C275 CHIP CERAMIC 56PF 135-639-1Y
C277 CHIP CERAMIC 47PF 134-773-5Y
C278 CHIP CERAMIC 75PF 137-512-1Z
C280 CHIP CERAMIC 20PF 132-021-9
C281 CHIP CERAMIC 56PF 135-613-9Y
C283 CHIP CERAMIC 27PF 132-723-0Y
C354 CHIP CERAMIC 30PF 133-010-4Y
C356 NOT USED NOT USED
C357 CHIP CERAMIC 5.6PF 135-627-2Y
C358 CHIP CERAMIC 5.6PF 135-627-2Y
C365 CHIP CERAMIC 18PF 131-816-6Y
C367 CHIP CERAMIC 4.7PF 134-767-0Y
C368 CHIP CERAMIC 4.7PF 134-767-0Y
L353 COIL CORE CHIP 320-859-9
L356 COIL CORE CHIP 311-117-4
R182 CHIP RESISTOR 150 OHM 060-151-1Z
650-XXX-XXXX FRONT END ASSY.
Page-37-
December 98
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
REF #
FRONT-END PCB ASSEMBLY (REFER TO BAND CHART)
C1 CHIP CERAMIC 470PF 134-761-4Y
C101 CHIP CERAMIC 220PF 132-220-2Y
C102 CHIP CERAMIC 220PF 132-220-2Y
C103 CHIP CERAMIC 220PF 132-220-2Y
C104 CHIP CERAMIC 220PF 132-220-2Y
C105 CHIP CERAMIC 5PF 135-010-4Y
C106 CHIP CERAMIC 470PF 134-761-4Y
C107 CHIP CERAMIC 0.1UF 130-170-0Y
C108 CHIP CERAMIC 1UF 131-089-7Y
C109 CHIP CERAMIC 220PF 132-220-2Y
C110 CHIP CERAMIC 0.001UF 130-A17-6Y
C113 CHIP TANTALUM 1UF 141-036-1Z
C114 MYLAR CAPACITOR 0.1UF 111-022-9
C115 CHIP CERAMIC 0.1UF 130-170-0Y
C119 CHIP CERAMIC 10PF 131-039-1Y
C120 MYLAR CAPACITOR 0.01UF 111-008-7Z
C121 CHIP CERAMIC 470PF 134-761-4Y
C122 CHIP CERAMIC 0.1UF 130-A60-4Y
C129 CHIP CERAMIC 0.001UF 131-025-8Y
C139 CHIP CERAMIC 220PF 132-220-2Y
C144 CHIP CERAMIC 1.5PF 131-559-4Y
C145 CHIP CERAMIC 0.001UF 130-A17-6Y
C147 ELECT CAPACITOR 47UF 104-713-2
C148 CHIP CERAMIC 220PF 132-220-2Y
C149 CHIP CERAMIC 220PF 132-220-2Y
C150 CHIP CERAMIC 220PF 132-220-2Y
C151 CHIP CERAMIC 470PF 134-761-4Y
C152 ELECT CAPACITOR 2200UF 102-278-6
C156 CHIP CERAMIC 0.001UF 130-A17-6Y
C157 CHIP CERAMIC 15PF 131-511-0Y
C158 CHIP CERAMIC 0.001UF 130-A17-6Y
C159 CHIP CERAMIC 0.001UF 130-A17-6Y
C161 CHIP CERAMIC 0.1UF 130-170-0Y
C162 CHIP CERAMIC 220PF 132-220-2Y
C167 CHIP CERAMIC 82PF 138-210-3Y
C168 CHIP CERAMIC 0.001UF 130-A17-6Y
C169 CHIP CERAMIC 0.01UF 130-172-2Y
C170 CHIP CERAMIC 220PF 132-220-2Y
C172 CHIP CERAMIC 15PF 131-511-0Y
C173 CHIP CERAMIC 56PF 135-613-9Y
C174 CHIP CERAMIC 3.3PF 133-321-5Y
C175 CHIP CERAMIC 20PF 132-012-1Y
C176 CHIP CERAMIC 39PF 133-932-7Y
C177 CHIP CERAMIC 0.001UF 130-A17-6Y
C178 CHIP CERAMIC 0.001UF 130-A17-6Y
C179 CHIP CERAMIC 82PF 138-210-3Y
C180 CHIP CERAMIC 0.01UF 130-172-2Y
C181 DIP TANTALUM 10UF 141-012-9Z
C182 CHIP CERAMIC 0.001UF 130-A17-6Y
DESCRIPTION PART #
REF # DESCRIPTION PART #
C183 CHIP CERAMIC 47PF 134-722-1Y
C184 CHIP CERAMIC 33PF 133-306-2Y
C185 CHIP CERAMIC 20PF 132-012-1Y
C186 CHIP CERAMIC 0.1UF 130-A60-4Y
C187 CHIP CERAMIC 0.1UF 130-A60-4Y
C188 CHIP CERAMIC 220PF 132-220-2Y
C189 CHIP CERAMIC 0.68UF 130-624-4
C190 CHIP CERAMIC 0.033UF 130-314-5Y
C191 CHIP CERAMIC 0.1UF 130-A60-4Y
C192 CHIP CERAMIC 0.033UF 130-314-5Y
C193 CHIP CERAMIC 0.1UF 130-A60-4Y
C194 CHIP CERAMIC 0.0033UF 130-315-6Y
C195 CHIP CERAMIC 10PF 131-039-1Y
C196 CHIP CERAMIC 0.01UF 130-172-2Y
C197 CHIP CERAMIC 47PF 134-722-1Y
C198 CHIP CERAMIC 0.001UF 130-A17-6Y
C200 CHIP CERAMIC 0.1UF 130-A60-4Y
C201 CHIP CERAMIC 0.01UF 130-172-2Y
C202 CHIP CERAMIC 0.01UF 130-172-2Y
C203 CHIP CERAMIC 0.001UF 130-A17-6Y
C207 CHIP CERAMIC 0.001UF 130-A17-6Y
C209 CHIP CERAMIC 0.1UF 130-A60-4Y
C211 CHIP CERAMIC 0.01UF 130-172-2Y
C212 CHIP CERAMIC 0.01UF 130-172-2Y
C214 CHIP CERAMIC 220PF 132-220-2Y
C216 CHIP CERAMIC 220PF 132-220-2Y
C217 CHIP CERAMIC 220PF 132-220-2Y
C219 CHIP CERAMIC 220PF 132-220-2Y
C220 CHIP CERAMIC 220PF 132-220-2Y
C221 DIP TANTALUM 1UF 141-008-6Z
C222 DIP TANTALUM 10UF 141-012-9Z
C223 CHIP CERAMIC 220PF 132-220-2Y
C224 ELECT CAPACITOR 1000UF 101-A02-8
C225 CHIP CERAMIC 0.1UF 130-A60-4Y
C226 ELECT CAPACITOR 1000UF 101-048-0R
C227 CHIP CERAMIC 0.001UF 130-A17-6Y
C228 CHIP CERAMIC 0.001UF 130-A17-6Y
C230 CHIP CERAMIC 0.001UF 130-A17-6Y
C232 ELECT CAPACITOR 100UF 101-023-7
C233 ELECT CAPACITOR 220UF 102-224-7
C234 CHIP CERAMIC 220PF 132-220-2Y
C235 CHIP CERAMIC 0.001UF 130-A17-6Y
C236 CHIP CERAMIC 220PF 132-220-2Y
C237 CHIP CERAMIC 0.001UF 130-A17-6Y
C238 ELECT CAPACITOR 2200UF 102-278-6
C239 ELECT CAPACITOR 10UF 101-025-9
C240 CHIP CERAMIC 39PF 133-932-7Y
C241 CHIP CERAMIC 82PF 138-210-3Y
C244 CHIP CERAMIC 0.001UF 130-A17-6Y
C247 CHIP CERAMIC 220PF 132-220-2Y
Page-38-
December 98
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
REF #
C247 CHIP CERAMIC 220PF 132-220-2Y
C248 CHIP CERAMIC 27PF 132-714-2Y
C250 ELECT CAPACITOR 47UF 104-713-2
C251 CHIP CERAMIC 470PF 134-761-4Y
C252 CHIP CERAMIC 0.001UF 130-A17-6Y
C253 CHIP CERAMIC 75PF 137-504-4Y
C255 CHIP CERAMIC 470PF 134-761-4Y
C256 CHIP CERAMIC 75PF 137-504-4Y
C257 CHIP CERAMIC 0.01UF 130-172-2Y
C258 CHIP CERAMIC 470PF 134-761-4Y
C259 CHIP CERAMIC 0.01UF 130-172-2Y
C260 CHIP CERAMIC 0.01UF 130-172-2Y
C261 CHIP CERAMIC 39PF 133-937-2Y
C262 CHIP CERAMIC 75PF 137-512-1Z
C263 CHIP CERAMIC 0.001UF 130-A17-6Y
C264 CHIP CERAMIC 0.1UF 130-A60-4Y
C265 CHIP CERAMIC 0.001UF 130-A17-6Y
C266 CHIP CERAMIC 0.001UF 130-A17-6Y
C267 CHIP CERAMIC 0.001UF 130-A17-6Y
C268 CHIP CERAMIC 22PF 132-225-7Z
C271 CHIP CERAMIC 0.001UF 131-025-8Y
C272 CHIP CERAMIC 15PF 131-539-6Z
C274 CHIP CERAMIC 0.001UF 131-025-8Y
C279 ELECT CAPACITOR 10UF 101-025-9
C282 CHIP CERAMIC 470PF 134-761-4Y
C285 CHIP CERAMIC 0.001UF 130-A17-6Y
C286 CHIP CERAMIC 0.001UF 130-A17-6Y
C287 CHIP CERAMIC 0.001UF 130-A17-6Y
C288 CHIP CERAMIC 220PF 132-220-2Y
C289 CHIP CERAMIC 82PF 138-210-3Y
C290 CHIP CERAMIC 0.047UF 130-424-0Y
C292 CHIP CERAMIC 220PF 132-220-2Y
C295 CHIP CERAMIC 0.01UF 130-172-2Y
C296 CHIP CERAMIC 47PF 134-722-1Y
C297 CHIP CERAMIC 47PF 134-722-1Y
C298 CHIP CERAMIC 22PF 132-216-9Y
C299 CHIP CERAMIC 47PF 134-722-1Y
C300 CHIP CERAMIC 470PF 134-761-4Y
C301 CHIP CERAMIC 220PF 132-220-2Y
C302 CHIP CERAMIC 0.1UF 130-170-0Y
C310 CHIP CERAMIC 30PF 133-010-4Y
C311 CHIP CERAMIC 0.001UF 131-025-8Y
C312 CHIP CERAMIC 7PF 137-011-5Y
C313 CHIP CERAMIC 180PF 131-847-4Y
C314 CHIP CERAMIC 180PF 131-847-4Y
C315 CHIP CERAMIC 15PF 131-539-6Z
C351 CHIP CERAMIC 0.001UF 130-A17-6Y
C352 CHIP CERAMIC 7PF 137-007-1Y
C353 CHIP CERAMIC 9PF 139-003-8Y
DESCRIPTION PART #
REF # DESCRIPTION PART #
C355 CHIP CERAMIC 1.2PF 131-216-4Y
C356 CHIP CERAMIC 4PF 134-007-7Y
C359 CHIP CERAMIC 0.001UF 130-A17-6Y
C360 CHIP CERAMIC 2PF 132-011-0Y
C361 CHIP CERAMIC 0.001UF 130-A17-6Y
C362 CHIP CERAMIC 0.001UF 130-A17-6Y
C363 CHIP CERAMIC 0.001UF 130-A17-6Y
C364 CHIP CERAMIC 0.001UF 130-A17-6Y
C369 CHIP CERAMIC 1PF 131-030-2Y
C370 CHIP CERAMIC 0.001UF 130-A17-6Y
C371 CHIP CERAMIC 0.1UF 130-A60-4Y
C372 CHIP CERAMIC 0.01UF 130-172-2Y
C373 CHIP TANTALUM 3.3UF 143-312-0Z
C374 CHIP CERAMIC 0.001UF 130-A17-6Y
C375 CHIP CERAMIC 0.001UF 130-A17-6Y
C376 CHIP CERAMIC 0.1UF 130-A60-4Y
CF101 FILTER CRYSTAL 271-053-6
CF103 FILTER CERAMIC 270-007-0Z
CF104 FILTER CERAMIC 270-027-8Z
D102 DIODE SI CHIP 243-051-5
D103 DIODE 243-012-0
D104 DIODE 243-012-0
D106 DIODE SI CHIP 243-052-6
D107 DIODE SCHOTTKY CHIP 249-005-4
D108 DIODE CHIP 243-081-2
D120 DIODE CHIP 243-087-8
D124 DIODE RECTIFIER 245-008-7Z
D125 DIODE SI CHIP 243-052-6
D126 DIODE SWITCHING 243-063-6
D127 DIODE PIN 243-073-5
D128 DIODE SWITCHING 243-063-6
D129 DIODE SI CHIP 243-052-6
D351 DIODE 243-054-8
D352 DIODE 243-054-8
D353 DIODE 243-054-8
FB101 FERITE BEAD 320-423-8
IC101 I.C PLL 220-131-3
IC102 DBM MIXER MODULE 220-375-7
IC104 I.C OP AMP 231-064-4
IC105 I.C REGULATOR 220-378-0
IC107 I.C REGULATOR 222-013-0A
IC108 I.C 229-289-8
IC109 I.C POWER FM IF 223-421-0
IC113 I.C OP AMP 231-064-4
J1 JACK MINIATURE 420-728-5
L107 COIL CHIP 1UH 310-657-0
L108 COIL CHIP 1.0UH 311-079-3
L110 COIL CHIP 47NH 310-861-7
L111 COIL CHIP 0.15UH 310-706-1
Page-39-
December 98
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
REF #
L113 COIL SPRING 310-794-0
L115 COIL SPRING 310-793-9
L116 COIL SPRING 310-224-2
L117 COIL SPRING 310-368-9
L118 COIL CHOKE 1K 310-218-7
L119 COIL CHIP 0.15UH 310-706-1
L120 COIL CHOKE 1K 310-218-7
L121 COIL SPRING 310-275-8
L122 COIL ASS’Y 509-772
L123 COIL CHIP 47NH 310-861-7
L124 COIL CHIP 0.68UH 310-711-5
L125 COIL SPRING 310-368-9
L126 COIL SPRING 310-627-3
L127 COIL SPRING 311-224-7
L128 COIL SPRING 311-214-8
L129 COIL SPRING 310-536-4
L130 COIL SPRING 311-214-8
L131 COIL SPRING 311-214-8
L132 COIL SPRING 311-305-7
L134 COIL ASS’Y 509-772
L135 COIL ASS’Y 509-013
L225 COIL AXIAL 2.2UH 310-378-7
L226 COIL CHIP 1UH 310-657-0
L227 COIL CHIP 220UH 310-862-8Y
L228 COIL AXIAL 1MH 310-381-0
L229 COIL AXIAL 1MH 310-381-0
L351 COIL CHIP 1.0UH 311-079-3
L352 COIL CHIP 0.82UH 311-078-2
L354 COIL CHIP 2.2UH 311-083-6
L356 COIL CHIP 311-117-4
L357 COIL CHIP 2.2UH 311-083-6
L358 COIL CHIP 1.0UH 311-079-3
Q101 TRANSISTOR 202-113-1
Q102 TRANSISTOR 202-106-5
Q103 TRANSISTOR 202-106-5
Q104 TRANSISTOR 202-113-1
Q105 TRANSISTOR 218-057-7Z
Q106 TRANSISTOR 203-096-4
Q108 TRANSISTOR 202-095-8Z
Q113 TRANSISTOR 200-003-5
Q114 TRANSISTOR 200-003-5
Q116 TRANSISTOR 203-181-7
Q117 TRANSISTOR 200-045-3
Q118 TRANSISTOR 203-043-6Z
Q120 TRANSISTOR 203-087-6
Q121 TRANSISTOR 202-095-8Z
Q122 TRANSISTOR 203-111-4
Q123 TRANSISTOR 202-095-8Z
Q124 TRANSISTOR 202-113-1
Q125 TRANSISTOR 202-066-2
DESCRIPTION PART #
REF # DESCRIPTION PART #
Q127 TRANSISTOR 202-095-8Z
Q128 BRT 202-092-5
Q130 TRANSISTOR 200-003-5
Q132 TRANSISTOR 202-113-1
Q133 TRANSISTOR 202-113-1
Q134 TRANSISTOR 202-095-8Z
Q135 TRANSISTOR 202-095-8Z
Q137 TRANSISTOR 202-095-8Z
Q139 BRT 202-092-5
Q140 TRANSISTOR 202-095-8Z
Q219 TRANSISTOR 202-095-8Z
Q351 TRANSISTOR 203-116-9
Q352 TRANSISTOR 203-116-9
Q353 TRANSISTOR 202-099-2Z
Q354 TRANSISTOR 202-098-1
Q360 TRANSISTOR 202-113-1
R100 CHIP RESISTOR 2.2K 060-222-2Z
R1001 CHIP RESISTOR 470 060-471-0Z
R101 CHIP RESISTOR 1.8K 060-182-9Z
R102 CHIP RESISTOR 0 060-000-8Z
R103 CHIP RESISTOR 0 060-000-8Z
R104 CHIP RESISTOR 1.8K 060-182-9Z
R105 CHIP RESISTOR 470 060-471-0Z
R106 CHIP RESISTOR 1.8K 060-182-9Z
R107 CHIP RESISTOR 470 060-471-0Z
R108 CHIP RESISTOR 0 060-000-8Z
R110 CHIP RESISTOR 1.2K 060-122-5Z
R111 CHIP RESISTOR 2.7K 060-272-7Z
R112 CHIP RESISTOR 7.5K 060-752-4Z
R113 CHIP RESISTOR 100K 060-104-9Z
R114 CHIP RESISTOR 10K 060-103-8Z
R116 CHIP RESISTOR 10K 060-103-8Z
R117 CHIP RESISTOR 24K 060-243-1Z
R118 CHIP RESISTOR 10K 060-103-8Z
R119 CHIP RESISTOR 10K 060-103-8Z
R130 CHIP RESISTOR 1.2K 060-122-5Z
R131 CHIP RESISTOR 91K 060-913-3Z
R132 CHIP RESISTOR 4.7K 060-472-1Z
R133 CHIP RESISTOR 20K 060-203-5Z
R134 CHIP RESISTOR 6.8K 060-682-4Z
R135 CHIP RESISTOR 39 060-390-8Z
R136 CHIP RESISTOR 2.7K 060-272-7Z
R137 CHIP RESISTOR 2.7K 060-272-7Z
R138 CHIP RESISTOR 470 060-471-0Z
R139 CHIP RESISTOR 22K 060-223-3Z
R140 CHIP RESISTOR 10 060-100-5Z
R141 CHIP RESISTOR 470 060-471-0Z
R142 CHIP RESISTOR 10K 060-103-8Z
R143 CHIP RESISTOR 1.8K 060-182-9Z
R144 CHIP RESISTOR 51 060-510-2
Page-40-
December 98
MAXON SM-2000 MOBILE
650-000-0001 SM-2150/VHF MAIN BOARD
REF #
R146 CHIP RESISTOR 15K 060-153-3Z
R147 CHIP RESISTOR 560K 060-564-1Z
R148 CHIP RESISTOR 15K 060-153-3Z
R149 CHIP RESISTOR 10 060-100-5Z
R150 CHIP RESISTOR 560K 060-564-1Z
R151 CHIP RESISTOR 22K 060-223-3Z
R152 CHIP RESISTOR 47 060-470-9Z
R153 CHIP RESISTOR 3.9K 060-392-2Z
R154 CHIP RESISTOR 2.2 060-229-9Z
R156 CHIP RESISTOR 6.8K 060-682-4Z
R157 CHIP RESISTOR 300 060-301-8Z
R158 CHIP RESISTOR 3.3K 060-332-8Z
R159 CHIP RESISTOR 4.7 060-479-8Z
R160 CHIP RESISTOR 22 060-220-0Z
R161 CHIP RESISTOR 1.8K 060-182-9Z
R162 CHIP RESISTOR 6.8 060-689-5Z
R163 CHIP RESISTOR 47 060-470-9Z
R164 CHIP RESISTOR 150 060-151-1Z
R168 CHIP RESISTOR 10K 060-103-8Z
R170 CHIP RESISTOR 470 060-471-0Z
R172 CHIP RESISTOR 3.3K 060-332-8Z
R173 CHIP RESISTOR 3.3K 060-332-8Z
R174 CHIP RESISTOR 10 060-100-5Z
R175 FILM RESISTOR 330 030-331-8Z
R176 FILM RESISTOR 120 030-121-5Z
R177 CHIP RESISTOR 1.2K 060-122-5Z
R178 CHIP RESISTOR 1.2K 060-122-5Z
R180 CHIP RESISTOR 10K 060-103-8Z
R181 FILM RESISTOR 120 030-121-5Z
R182 CHIP RESISTOR 120 060-121-4Z
R182 CHIP RESISTOR 150 060-151-1Z
R183 CHIP RESISTOR 470K 060-474-3Z
R184 CHIP RESISTOR 10 060-100-5Z
R185 CHIP RESISTOR 47K 060-473-2Z
R187 CHIP RESISTOR 10K 060-103-8Z
R190 CHIP RESISTOR 22K 060-223-3Z
R191 CHIP RESISTOR 2.7K 060-272-7Z
R192 CHIP RESISTOR 22K 060-223-3Z
R193 CHIP RESISTOR 2.7K 060-272-7Z
R194 CHIP RESISTOR 10K 060-103-8Z
R195 CHIP RESISTOR 18K 060-183-0Z
R196 CHIP RESISTOR 82K 060-823-5Z
R197 CHIP RESISTOR 100K 060-104-9Z
R198 CHIP RESISTOR 1K 060-102-7Z
R200 CHIP RESISTOR 47K 060-473-2Z
R201 CHIP RESISTOR 330K 060-334-0Z
R202 CHIP RESISTOR 2.7K 060-272-7Z
R203 CHIP RESISTOR 150K 060-154-4Z
R204 CHIP RESISTOR 1K 060-102-7Z
R205 CHIP RESISTOR 100 060-101-6Z
DESCRIPTION PART #
REF # DESCRIPTION PART #
R206 CHIP RESISTOR 2.7K 060-272-7Z
R207 CHIP RESISTOR 100 060-101-6Z
R210 CHIP RESISTOR 100 060-101-6Z
R211 CHIP RESISTOR 68K 060-683-5Z
R213 CHIP RESISTOR 22K 060-223-3Z
R214 CHIP RESISTOR 22K 060-223-3Z
R215 CHIP RESISTOR 10K 060-103-8Z
R217 CHIP RESISTOR 10K 060-103-8Z
R218 CHIP RESISTOR 10K 060-103-8Z
R219 CHIP RESISTOR 39K 060-393-3Z
R220 CHIP RESISTOR 56K 060-563-0Z
R221 CHIP RESISTOR 22K 060-223-3Z
R222 CHIP RESISTOR 22K 060-223-3Z
R223 CHIP RESISTOR 2.2K 060-222-2Z
R224 CHIP RESISTOR 0 060-000-8Z
R250 CHIP RESISTOR 12K 060-123-6Z
R251 CHIP RESISTOR 2K 060-202-4Z
R252 CHIP RESISTOR 1K 060-102-7Z
R253 CHIP RESISTOR 1.8K 060-182-9Z
R351 CHIP RESISTOR 10K 060-103-8Z
R352 CHIP RESISTOR 330 060-331-7Z
R353 CHIP RESISTOR 47 060-470-9Z
R354 CHIP RESISTOR 10K 060-103-8Z
R355 CHIP RESISTOR 330 060-331-7Z
R356 CHIP RESISTOR 47 060-470-9Z
R357 CHIP RESISTOR 1.2K 060-122-5Z
R358 CHIP RESISTOR 10K 060-103-8Z
RV101 RESISTOR SEMIFIXED 22KB 071-223-1
RV102 RESISTOR SEMIFIXED 1KB 071-102-5
RV103 RESISTOR SEMIFIXED 10KB 071-103-6
RV104 RESISTOR SEMIFIXED 10KB 071-103-6
RV105 RESISTOR SEMIFIXED 4.7KB 071-472-9
T101 COIL IFT 600NH 45MHZ 321-014-7
T102 COIL IFT 600NH 45MHZ 321-014-7
T103 COIL 455KHZ DETECTOR 320-232-2
T104 TRANSFORMER CHOKE 300-008-1
TH101 THERMISTOR CHIP 33K 098-333-8
X101 CRYSTAL NR2B 44.545M 261-932-7Z
Page-41-
December 98
MAXON SM-2000 MOBILE
650-000-0002 SM-2450/UHF MAIN BOARD
650-000-0002 SM-2450/UHF MAIN BOARD
BAND CHART
SM-2450A UHF BAND 1
(400-430 MHz)
REF # PART # VALUE
FRONT-END PCB ASSEMBLY
650-110-0007
MAIN BOARD PARTS
C130 133-932-7Y 39pF
C133 131-039-1Y 10pF
C134 134-767-0Y 4.7pF
C135 139-003-8Y 9pF
C136 139-003-8Y 9pF
C158 131-039-1Y 10pF
C242 131-039-1Y 10pF
C243 131-039-1Y 10pF
C272 136-015-4Y 6pF
C273 131-029-2Y 10PF
C275 131-029-2Y 10PF
C277 131-029-2Y 10PF
C281 131-039-1Y 10pF
C283 137-011-5Y 7pF
IC103 220-347-2 M57729L
R180 060-472-1Z 4.7K
R182 060-221-1Z 220 OHM
R210 060-470-9Z 47 OHM
SM-2450C UHF BAND 2
(420-450 MHz)
REF # PART # VALUE
FRONT-END PCB ASSEMBLY
650-110-0008
MAIN BOARD PARTS
C130 133-932-7Y 39pF
C133 138-004-4Y 8pF
C134 134-767-0Y 4.7pF
C135 138-004-4Y 8pF
C136 138-004-4Y 8pF
C158 135-010-4Y 5pF
C242 138-004-4Y 8pF
C243 134-767-0Y 4.7pF
C272 135-019-3Y 5pF
C273 131-029-2Y 10PF
C275 131-029-2Y 10PF
C277 131-029-2Y 10PF
C281 137-007-1Y 7pF
C283 136-015-4Y 6pF
IC103 220-348-3 M57729
R180 060-472-1Z 4.7K
R182 060-221-1Z 220 OHM
R210 060-470-9Z 47 OHM
SM-2450D UHF BAND 3
(440-470 MHz)
REF # PART # VALUE
FRONT-END PCB ASSEMBLY
650-110-0001
MAIN BOARD PARTS
C130 132-714-2Y 27pF
C133 136-833-6Y 6.8pF
C134 134-007-7Y 4pF
C135 138-004-4Y 8pF
C136 131-208-7Y 12pF
C158 135-010-4Y 5pF
C242 138-004-4Y 8pF
C243 134-767-0Y 4.7pF
C272 135-019-3Y 5pF
C273 137-011-5Y 7PF
C275 139-006-1Y 9PF
C277 131-029-2Y 10PF
C281 137-007-1Y 7pF
C283 136-015-4Y 6pF
IC103 220-350-5 M57729H
R180 060-392-2Z 3.9K
R182 060-101-6Z 100 OHM
R210 060-470-9Z 47 OHM
650-XXX-XXXX
Page-42-
December 98
BAND CHART(continued)
MAXON SM-2000 MOBILE
650-000-0002 SM-2450/UHF MAIN BOARD
SM-2450E UHF BAND 4
(470-490 MHz)
REF # PART # VALUE
FRONT-END PCB ASSEMBLY
650-110-0009
MAIN BOARD PARTS
C130 131-829-8Y 18pF
C133 136-015-4Y 6pF
C134 133-321-5Y 3.3pF
C135 135-019-3Y 5pF
C136 137-007-1Y 7pF
C158 133-321-5Y 3.3pF
C242 137-007-1Y 7pF
C243 133-321-5Y 3.3pF
C272 134-007-7Y 4pF
C273 137-011-5Y 7PF
C275 139-006-1Y 9PF
C277 138-230-1Y 8PF
C281 131-039-1Y 10pF
C283 135-019-3Y 5pF
IC103 220-349-4 M57729UH
R180 060-272-7Z 2.7K
R182 060-101-6Z 100 OHM
R210 060-470-9Z 47 OHM
SM-2450B UHF BAND 5
(490-512 MHz)
REF # PART # VALUE
FRONT-END PCB ASSEMBLY
650-110-0010
MAIN BOARD PARTS
C130 132-407-5Y 24pF
C133 134-007-7Y 4pF
C134 133-321-5Y 3.3pF
C135 135-019-3Y 5pF
C136 138-004-4Y 8pF
C158 134-007-7Y 4pF
C242 135-019-3Y 5pF
C243 133-321-5Y 3.3pF
C272 135-019-3Y 5pF
C273 131-029-2Y 10PF
C275 131-029-2Y 10PF
C277 131-029-2Y 10PF
C281 131-039-1Y 10pF
C283 134-007-7Y 4pF
IC103 220-346-1 M57729SH
R180 060-472-1Z 4.7K
R182 060-221-1Z 220 OHM
R210 060-470-9Z 47 OHM
Page-43-
December 98
MAXON SM-2000 MOBILE
650-000-0002 SM-2450/UHF MAIN BOARD
REF #
FRONT-END PCB ASSEMBLY (REFER TO BAND CHART)
ANT1 CONNECTOR ANT 422-907-0
ANT1 CONNECTOR SW-1456(BNC-R) 421-655-7
ANT1 PIN CU &1.1X13(101-01) 860-129
C101 CHIP CERAMIC 220PF 132-220-2Y
C102 CHIP CERAMIC 220PF 132-220-2Y
C103 CHIP CERAMIC 220PF 132-220-2Y
C104 CHIP CERAMIC 220PF 132-220-2Y
C105 CHIP CERAMIC 5PF 135-010-4Y
C106 CHIP CERAMIC 470PF 134-761-4Y
C107 CHIP CERAMIC 0.1UF 130-170-0Y
C108 CHIP CERAMIC 220PF 132-220-2Y
C109 CHIP CERAMIC 220PF 132-220-2Y
C110 CHIP CERAMIC 0.001UF 130-A17-6Y
C113A POLY CAPACITOR 0.33UF 120-313-6
C114 MYLAR CAPACITOR 0.01UF 111-008-7Z
C115 CHIP CERAMIC 220PF 132-220-2Y
C118 CHIP CERAMIC 4.7PF 134-767-0Y
C119 CHIP CERAMIC 15PF 131-511-0Y
C120 MYLAR CAPACITOR 0.01UF 111-008-7Z
C121 CHIP CERAMIC 220PF 132-220-2Y
C122 CHIP CERAMIC 0.1UF 130-170-0Y
C125 CHIP TANTALUM 1UF 141-036-1Z
C126 CHIP CERAMIC 220PF 132-220-2Y
C127 CHIP CERAMIC 470PF 134-761-4Y
C128 CHIP CERAMIC 0.001UF 130-A17-6Y
C129 CHIP CERAMIC 0.1UF 130-170-0Y
C131 CHIP CERAMIC 220PF 132-220-2Y
C137 CHIP CERAMIC 68PF 136-816-5Y
C138 CHIP CERAMIC 2.2PF 132-266-4Y
C139 CHIP CERAMIC 220PF 132-220-2Y
C140 CHIP CERAMIC 47PF 134-722-1Y
C141 CHIP CERAMIC 5PF 135-010-4Y
C142 CHIP CERAMIC 12PF 131-208-7Y
C143 CHIP CERAMIC 220PF 132-220-2Y
C144 CHIP CERAMIC 0.5PF 130-504-9Y
C145 CHIP CERAMIC 0.001UF 130-A17-6Y
C146 CHIP CERAMIC 12PF 131-208-7Y
C147 ELECT CAPACITOR 47UF 104-713-2
C148 CHIP CERAMIC 220PF 132-220-2Y
C149 CHIP CERAMIC 220PF 132-220-2Y
C150 CHIP CERAMIC 220PF 132-220-2Y
C151 CHIP CERAMIC 470PF 134-761-4Y
C152 ELECT CAPACITOR 2200UF 102-278-6
C155 CHIP CERAMIC 2.2PF 132-266-4Y
C156 CHIP CERAMIC 47PF 134-722-1Y
C157 CHIP CERAMIC 5.6PF 135-627-2Y
C159 CHIP CERAMIC 6PF 136-005-5Y
C160 CHIP CERAMIC 0.001UF 130-A17-6Y
C162 CHIP CERAMIC 3.3PF 133-321-5Y
DESCRIPTION PART #
REF # DESCRIPTION PART #
C163 CHIP CERAMIC 6PF 136-005-5Y
C164 CHIP CERAMIC 12PF 131-208-7Y
C165 CHIP CERAMIC 6PF 136-005-5Y
C167 CHIP CERAMIC 82PF 138-210-3Y
C168 CHIP CERAMIC 0.001UF 130-A17-6Y
C169 CHIP CERAMIC 47PF 134-722-1Y
C172 CHIP CERAMIC 15PF 131-511-0Y
C173 CHIP CERAMIC 56PF 135-613-9Y
C174 CHIP CERAMIC 3.3PF 133-321-5Y
C175 CHIP CERAMIC 20PF 132-012-1Y
C176 CHIP CERAMIC 39PF 133-932-7Y
C177 CHIP CERAMIC 0.001UF 130-A17-6Y
C178 CHIP CERAMIC 0.001UF 130-A17-6Y
C179 CHIP CERAMIC 82PF 138-210-3Y
C180 CHIP CERAMIC 0.01UF 130-172-2Y
C181 DIP TANTALUM 10UF 141-012-9Z
C182 CHIP CERAMIC 0.001UF 130-A17-6Y
C183 CHIP CERAMIC 47PF 134-722-1Y
C184 CHIP CERAMIC 30PF 133-010-4Y
C185 CHIP CERAMIC 15PF 131-511-0Y
C186 CHIP CERAMIC 0.1UF 130-A60-4Y
C187 CHIP CERAMIC 0.1UF 130-A60-4Y
C188 CHIP CERAMIC 220PF 132-220-2Y
C189 CHIP CERAMIC 0.1UF 130-170-0Y
C190 CHIP CERAMIC 0.033UF 130-314-5Y
C191 CHIP CERAMIC 0.1UF 130-A60-4Y
C192 CHIP CERAMIC 0.033UF 130-314-5Y
C193 CHIP CERAMIC 0.1UF 130-A60-4Y
C194 CHIP CERAMIC 0.0033UF 130-315-6Y
C195 CHIP CERAMIC 10PF 131-039-1Y
C196 CHIP CERAMIC 0.01UF 130-172-2Y
C197 CHIP CERAMIC 47PF 134-722-1Y
C198 CHIP CERAMIC 0.001UF 130-A17-6Y
C199 CHIP CERAMIC 12PF 131-208-7Y
C200 CHIP CERAMIC 0.1UF 130-A60-4Y
C201 CHIP CERAMIC 0.01UF 130-172-2Y
C202 CHIP CERAMIC 0.01UF 130-172-2Y
C203 CHIP CERAMIC 0.001UF 130-A17-6Y
C204 CHIP CERAMIC 6PF 136-005-5Y
C207 CHIP CERAMIC 0.001UF 130-A17-6Y
C209 CHIP CERAMIC 0.1UF 130-A60-4Y
C210 MYLAR CAPACITOR 0.022UF 112-211-8Z
C211 CHIP CERAMIC 0.01UF 130-172-2Y
C212 CHIP CERAMIC 0.01UF 130-172-2Y
C214 CHIP CERAMIC 220PF 132-220-2Y
C216 CHIP CERAMIC 220PF 132-220-2Y
C217 CHIP CERAMIC 220PF 132-220-2Y
C218 ELECT CAPACITOR 10UF 101-025-9
C218 ELECT CAPACITOR 10UF 101-025-9
C219 CHIP CERAMIC 220PF 132-220-2Y
Page-44-
December 98
MAXON SM-2000 MOBILE
650-000-0002 SM-2450/UHF MAIN BOARD
REF #
C219 CHIP CERAMIC 220PF 132-220-2Y
C220 CHIP CERAMIC 220PF 132-220-2Y
C221 DIP TANTALUM 1UF 141-008-6Z
C222 DIP TANTALUM 10UF 141-012-9Z
C223 CHIP CERAMIC 220PF 132-220-2Y
C224 ELECT CAPACITOR 1000UF 101-A02-8
C225 CHIP CERAMIC 0.1UF 130-A60-4Y
C226 ELECT CAPACITOR 1000UF 101-048-0
C227 CHIP CERAMIC 0.001UF 130-A17-6Y
C230 CHIP CERAMIC 0.001UF 130-A17-6Y
C231 CHIP CERAMIC 220PF 132-220-2Y
C232 ELECT CAPACITOR 100UF 101-023-7
C233 ELECT CAPACITOR 220UF 102-224-7
C234 CHIP CERAMIC 220PF 132-220-2Y
C235 CHIP CERAMIC 0.001UF 130-A17-6Y
C236 CHIP CERAMIC 220PF 132-220-2Y
C237 CHIP CERAMIC 0.001UF 130-A17-6Y
C238 ELECT CAPACITOR 2200UF 102-278-6
C239 ELECT CAPACITOR 10UF 101-025-9
C240 CHIP CERAMIC 10PF 131-039-1Y
C247 CHIP CERAMIC 470PF 134-761-4Y
C249 CHIP CERAMIC 220PF 132-220-2Y
C250 ELECT CAPACITOR 47UF 104-713-2
C251 CHIP CERAMIC 470PF 134-761-4Y
C252 CHIP CERAMIC 220PF 132-220-2Y
C253 CHIP CERAMIC 33PF 133-306-2Y
C255 CHIP CERAMIC 470PF 134-761-4Y
C256 CHIP CERAMIC 220PF 132-220-2Y
C257 CHIP CERAMIC 0.001UF 130-A17-6Y
C258 CHIP CERAMIC 220PF 132-220-2Y
C259 CHIP CERAMIC 220PF 132-220-2Y
C260 CHIP CERAMIC 0.001UF 130-A17-6Y
C261 CHIP CERAMIC 220PF 132-220-2Y
C262 CHIP CERAMIC 0.001UF 130-A17-6Y
C263 CHIP CERAMIC 0.001UF 131-025-8Y
C264 CHIP CERAMIC 220PF 132-220-2Y
C265 CHIP CERAMIC 220PF 132-220-2Y
C266 CHIP CERAMIC 220PF 132-220-2Y
C267 CHIP CERAMIC 220PF 132-220-2Y
C269 CHIP CERAMIC 4PF 134-007-7Y
C271 CHIP CERAMIC 0.001UF 131-025-8Y
C273 CHIP CERAMIC 10PF 131-029-2Y
C279 ELECT CAPACITOR 47UF 104-713-2
C280 CHIP CERAMIC 5PF 135-019-3Y
C282 CHIP CERAMIC 470PF 134-761-4Y
C284 CHIP CERAMIC 470PF 134-761-4Y
C285 CHIP CERAMIC 220PF 132-220-2Y
C286 CHIP CERAMIC 220PF 132-220-2Y
C287 CHIP CERAMIC 220PF 132-220-2Y
DESCRIPTION PART #
REF # DESCRIPTION PART #
C288 CHIP CERAMIC 220PF 132-220-2Y
C289 CHIP CERAMIC 82PF 138-210-3Y
C290 CHIP CERAMIC 0.047UF 130-424-0Y
C292 CHIP CERAMIC 220PF 132-220-2Y
C294 CHIP CERAMIC 220PF 132-220-2Y
C295 CHIP CERAMIC 0.01UF 130-172-2Y
C296 CHIP CERAMIC 47PF 134-722-1Y
C297 CHIP CERAMIC 12PF 131-208-7Y
C298 CHIP CERAMIC 22PF 132-216-9Y
C299 CHIP CERAMIC 47PF 134-722-1Y
C300 CHIP CERAMIC 470PF 134-761-4Y
C301 CHIP CERAMIC 220PF 132-220-2Y
C303 CHIP CERAMIC 220PF 132-220-2Y
C407 ELECT CAPACITOR 10UF 101-025-9
C435 ELECT CAPACITOR 1UF 101-006-2
C438 ELECT CAPACITOR 10UF 101-025-9
C558 ELECT CAPACITOR 10UF 101-025-9
CABLE1 COAXIAL UT85 SEMI-RIGID 427-335-8
CF1 FEED THROUGH CAP 0.001UF 181-005-5
CF101 FILTER CRYSTAL 271-054-7
CF103 FILTER CERAMIC 270-007-0Z
CF104 FILTER CERAMIC 270-027-8Z
CON405 CONNECTOR BOX SOCKET 421-677-7
D101 DIODE VARICAP CHIP 242-022-4
D102 DIODE VARICAP CHIP 242-022-4
D103 DIODE 243-012-0
D104 DIODE 243-012-0
D105 DIODE SI CHIP 243-051-5
D106 DIODE SI CHIP 243-052-6
D107 DIODE SCHOTTKY CHIP 249-005-4
D108 DIODE PIN 243-081-2
D120 DIODE 243-058-2
D121 DIODE 243-012-0
D124 DIODE RECTIFIER 245-008-7Z
D125 DIODE SI CHIP 243-052-6
D126 DIODE SWITCHING 243-063-6
D127 DIODE PIN 243-073-5
D128 DIODE SWITCHING 243-063-6
D129 DIODE SI CHIP 243-052-6
FB CORE BEAD 320-536-5
IC101 I.C PLL 220-131-3
IC102 DBM MIXER MODULE 220-375-7
IC104 I.C OP AMP 231-064-4
IC105 I.C REGULATOR 220-378-0
IC107 I.C REGULATOR 222-013-0A
IC108 I.C 229-289-8
IC109 I.C POWER FM IF 223-421-0
IC401 I.C 223-224-9
J1 JACK MINIATURE 420-728-5
Page-45-
December 98
MAXON SM-2000 MOBILE
650-000-0002 SM-2450/UHF MAIN BOARD
REF #
L101 COIL CHIP 0.68UH 310-711-5
L102 COIL CHIP 0.68UH 310-711-5
L103 COIL CHIP 47NH 310-861-7
L104 COIL CHIP 27NH 310-860-6
L106 COIL CHIP 27NH 310-860-6
L107 COIL SPRING 310-304-1
L108 COIL CHIP 18NH 310-859-6
L110 COIL CHIP 18NH 310-859-6
L111 COIL CHIP 0.15UH 310-706-1
L113 COIL SPRING 311-158-1
L114 COIL CHIP 0.15UH 310-706-1
L115 COIL SPRING 311-158-1
L116 COIL SPRING 311-178-9
L118 COIL SPRING 311-180-1
L119 COIL CHIP 0.15UH 310-706-1
L120 COIL SPRING 311-180-1
L121 COIL SPRING 311-180-1
L122 COIL SPRING 311-179-0
L123 COIL CHIP 18NH 310-859-6
L124 COIL CHIP 18NH 310-859-6
L125 COIL SPRING 311-180-1
L225 COIL AXIAL 2.2UH 310-378-7
L226 COIL CHIP 1UH 310-657-0
L227 COIL CHIP 220UH 310-862-8Y
L228 COIL AXIAL 1MH 310-381-0
L229 COIL AXIAL 1MH 310-381-0
Q101 TRANSISTOR 202-113-1
Q102 TRANSISTOR 202-106-5
Q103 TRANSISTOR 202-106-5
Q104 TRANSISTOR 202-113-1
Q105 TRANSISTOR 218-057-7Z
Q106 TRANSISTOR 203-096-4
Q107 TRANSISTOR 202-113-1
Q108 TRANSISTOR 203-104-8
Q110 TRANSISTOR 200-003-5
Q111 TRANSISTOR 200-003-5
Q113 TRANSISTOR 200-003-5
Q114 TRANSISTOR 200-003-5
Q116 TRANSISTOR 200-003-5
Q117 TRANSISTOR 200-045-3
Q119 BRT 202-092-5
Q121 TRANSISTOR 202-095-8Z
Q122 TRANSISTOR 203-111-4
Q123 TRANSISTOR 202-095-8Z
Q124 TRANSISTOR 202-113-1
Q125 TRANSISTOR 202-066-2
Q127 TRANSISTOR 202-095-8Z
Q128 BRT 202-092-5
Q130 TRANSISTOR 200-003-5
DESCRIPTION PART #
REF # DESCRIPTION PART #
Q132 TRANSISTOR 202-113-1
Q133 TRANSISTOR 202-113-1
Q134 TRANSISTOR 202-095-8Z
Q135 TRANSISTOR 202-095-8Z
Q137 TRANSISTOR 202-095-8Z
Q140 TRANSISTOR 202-095-8Z
Q219 TRANSISTOR 202-095-8Z
R100 CHIP RESISTOR 2.2K 060-222-2Z
R101 CHIP RESISTOR 1.8K 060-182-9Z
R102 CHIP RESISTOR 0 060-000-8Z
R103 CHIP RESISTOR 0 060-000-8Z
R104 CHIP RESISTOR 910 060-911-1Z
R105 CHIP RESISTOR 100 060-101-6Z
R106 CHIP RESISTOR 910 060-911-1Z
R107 CHIP RESISTOR 100 060-101-6Z
R108 CHIP RESISTOR 0 060-000-8Z
R109 CHIP RESISTOR 10K 060-103-8Z
R110 CHIP RESISTOR 3K 060-302-1Z
R111 CHIP RESISTOR 2.7K 060-272-7Z
R112 CHIP RESISTOR 2.7K 060-272-7Z
R113 CHIP RESISTOR 100K 060-104-9Z
R114 CHIP RESISTOR 10K 060-103-8Z
R115 CHIP RESISTOR 100 060-101-6Z
R116 CHIP RESISTOR 22 060-220-0Z
R117 CHIP RESISTOR 5.6K 060-562-9Z
R118 CHIP RESISTOR 3.3K 060-332-8Z
R119 CHIP RESISTOR 100 060-101-6Z
R120 CHIP RESISTOR 47 060-470-9Z
R121 CHIP RESISTOR 10 060-100-5Z
R122 CHIP RESISTOR 150 060-151-1Z
R123 CHIP RESISTOR 6.8K 060-682-4Z
R124 CHIP RESISTOR 10 060-100-5Z
R125 CHIP RESISTOR 220 060-221-1Z
R126 CHIP RESISTOR 12K 060-123-6Z
R127 CHIP RESISTOR 3.9K 060-392-2Z
R128 CHIP RESISTOR 1.2K 060-122-5Z
R130 CHIP RESISTOR 270K 060-274-9Z
R131 CHIP RESISTOR 1.2K 060-122-5Z
R132 CHIP RESISTOR 7.5K 060-752-4Z
R133 CHIP RESISTOR 12K 060-123-6Z
R134 CHIP RESISTOR 3.9K 060-392-2Z
R135 CHIP RESISTOR 1.2K 060-122-5Z
R136 CHIP RESISTOR 2.7K 060-272-7Z
R137 CHIP RESISTOR 2.7K 060-272-7Z
R138 CHIP RESISTOR 470 060-471-0Z
R139 CHIP RESISTOR 22K 060-223-3Z
R140 CHIP RESISTOR 10 060-100-5Z
R141 CHIP RESISTOR 470 060-471-0Z
R142 CHIP RESISTOR 10K 060-103-8Z
Page-46-
December 98
MAXON SM-2000 MOBILE
650-000-0002 SM-2450/UHF MAIN BOARD
REF #
R140 CHIP RESISTOR 10 060-100-5Z
R141 CHIP RESISTOR 470 060-471-0Z
R142 CHIP RESISTOR 10K 060-103-8Z
R143 CHIP RESISTOR 1.8K 060-182-9Z
R144 CHIP RESISTOR 51 060-510-2
R146 CHIP RESISTOR 15K 060-153-3Z
R147 CHIP RESISTOR 560K 060-564-1Z
R148 CHIP RESISTOR 15K 060-153-3Z
R149 CHIP RESISTOR 10 060-100-5Z
R150 CHIP RESISTOR 560K 060-564-1Z
R151 CHIP RESISTOR 22K 060-223-3Z
R152 CHIP RESISTOR 47 060-470-9Z
R153 CHIP RESISTOR 3.9K 060-392-2Z
R154 CHIP RESISTOR 2.2 060-229-9Z
R156 CHIP RESISTOR 15K 060-153-3Z
R157 CHIP RESISTOR 300 060-301-8Z
R158 CHIP RESISTOR 10K 060-103-8Z
R159 CHIP RESISTOR 68 060-680-2Z
R160 CHIP RESISTOR 10 060-100-5Z
R161 CHIP RESISTOR 560 060-561-8Z
R162 CHIP RESISTOR 2.2K 060-222-2Z
R163 CHIP RESISTOR 470 060-471-0Z
R164 CHIP RESISTOR 10 060-100-5Z
R165 CHIP RESISTOR 470 060-471-0Z
R166 CHIP RESISTOR 0 060-000-8Z
R168 CHIP RESISTOR 10K 060-103-8Z
R170 CHIP RESISTOR 470 060-471-0Z
R172 CHIP RESISTOR 3.3K 060-332-8Z
R173 CHIP RESISTOR 3.3K 060-332-8Z
R175 FILM RESISTOR 330 030-331-8Z
R176 FILM RESISTOR 120 030-121-5Z
R177 CHIP RESISTOR 1.2K 060-122-5Z
R178 CHIP RESISTOR 1.2K 060-122-5Z
R181 FILM RESISTOR 120 030-121-5Z
R183 CHIP RESISTOR 470K 060-474-3Z
R184 CHIP RESISTOR 10 060-100-5Z
R185 CHIP RESISTOR 47K 060-473-2Z
R187 CHIP RESISTOR 10K 060-103-8Z
R190 CHIP RESISTOR 22K 060-223-3Z
R191 CHIP RESISTOR 2.7K 060-272-7Z
R192 CHIP RESISTOR 22K 060-223-3Z
R193 CHIP RESISTOR 2.7K 060-272-7Z
R194 CHIP RESISTOR 10K 060-103-8Z
R195 CHIP RESISTOR 18K 060-183-0Z
R196 CHIP RESISTOR 82K 060-823-5Z
R197 CHIP RESISTOR 100K 060-104-9Z
R198 CHIP RESISTOR 1K 060-102-7Z
R200 CHIP RESISTOR 47K 060-473-2Z
R201 CHIP RESISTOR 330K 060-334-0Z
DESCRIPTION PART #
REF # DESCRIPTION PART #
R202 CHIP RESISTOR 2.7K 060-272-7Z
R203 CHIP RESISTOR 150K 060-154-4Z
R204 CHIP RESISTOR 1K 060-102-7Z
R205 CHIP RESISTOR 100 060-101-6Z
R206 CHIP RESISTOR 2.7K 060-272-7Z
R207 CHIP RESISTOR 100 060-101-6Z
R211 CHIP RESISTOR 68K 060-683-5Z
R213 CHIP RESISTOR 22K 060-223-3Z
R214 CHIP RESISTOR 22K 060-223-3Z
R215 CHIP RESISTOR 10K 060-103-8Z
R217 CHIP RESISTOR 10K 060-103-8Z
R218 CHIP RESISTOR 10K 060-103-8Z
R219 CHIP RESISTOR 39K 060-393-3Z
R220 CHIP RESISTOR 56K 060-563-0Z
R221 CHIP RESISTOR 22K 060-223-3Z
R222 CHIP RESISTOR 22K 060-223-3Z
R223 CHIP RESISTOR 2.2K 060-222-2Z
R225 CHIP RESISTOR 470 060-471-0Z
R250 CHIP RESISTOR 12K 060-123-6Z
R251 CHIP RESISTOR 2K 060-202-4Z
R252 CHIP RESISTOR 1K 060-102-7Z
R253 CHIP RESISTOR 1.8K 060-182-9Z
R458 CHIP RESISTOR 47K 060-473-2Z
R601 CHIP RESISTOR 56K 05B-563-7Z
R602 CHIP RESISTOR 100 05B-101-3Z
RV101 RESISTOR SEMIFIXED 22KB 071-223-1
RV102 RESISTOR SEMIFIXED 1KB 071-102-5
RV103 RESISTOR SEMIFIXED 10KB 071-103-6
RV104 RESISTOR SEMIFIXED 10KB 071-103-6
RV105 RESISTOR SEMIFIXED 4.7KB 071-472-9
T101 COIL IFT 600NH 45MHZ 321-014-7
T102 COIL IFT 600NH 45MHZ 321-014-7
T103 COIL 455KHZ DETECTOR 320-232-2
T104 TRANSFORMER CHOKE 300-008-1
TC101 DIP TRIMMER 10PF 171-013-9
TH101 THERMISTOR CHIP 33K 098-333-8
TP1 PIN CU 860-129
X101 CRYSTAL 261-932-7Z
P.C.B. MAIN (SM-2450) 406-194-C
Page-47-
December 98
MAXON SM-2000 MOBILE
COMPONENT PINOUT
COMPONENT PINOUT
Unless otherwise indicated all parts are common to the SM-2000 Series Radio.
BASE DIAGRAM
41
40
60
61
80
21
20
1
MANUFACTURER'S
PART NUMBER
HD4074818
REFERENCE NO.
IC409
= SM-2150/VHF
= SM-2450/UHF
TYPE
CPU
5
8
4
1
11
20
16
14
14
1
3
5
10
1
9
8
1
8
7
1
8
7
1
LM358M
AT93C56-10S1
MC14519IF PLL
MC14053 IC411,412
MC14066 IC401 Analog SW IC
MC3371D IC109
MF6CWM-100
IC104, IC105 OP Amp
IC408 EEPROM
IC101
Analog SW IC
IF IC
IC404,406,410KIA324F
OP Amp
Switched Cap FilterIC407
IC108TDA2003V
Audio AMP
1:IN
1
2
3
1
2:GND
3:OUT
1:OUT
2:GND
3
2
3:IN
KIA7808PI
KIA78L05F
IC107
IC105,402
Regulator
Regulator
Page-48-
December 98
MAXON SM-2000 MOBILE
Unless otherwise indicated all parts are common to the SM-2000 Series Radio.
BASE DIAGRAM
3(GATE)
1 (DRAIN)
2 (SOURCE)
MANUFACTURER'S
PART NUMBER
MMBFJ309LT1
KTA1504S(ASG)
COMPONENT PINOUT
= SM-2150/VHF
= SM-2450/UHF
REFERENCE NO.
*Q351,*352
Q102,103,504,821,822
BCX-18LT1
MMBC1321(Q4)
MMBC1321
C
E
B
KTC3875S(ALG) Q101,104,360,550-553
KRA110S(PK)
KR C111S
KRA104S
MMBR951
KRC104S(ND)
*Q122
**Q130
*Q106
**Q119,*139,128
*Q353
*Q105,*407
*Q116
Q121,123,127,131,134,135
Q137,140,219,401-406,409
*Q108,*Q354,
**Q105,**Q407
BFG35 Q117
E
C
B
B
C
E
KTB1367
**Q125,135
B
C
E
B
E
C
3
4
1
2
C
E
B
KTA1658
C1971
MRF5711
BFR92A
MMBR951
2SC5084
MMBR9426
*Q125
*Q118
**Q108
Q113,114,
*Q130,
**Q110,**Q111,**Q116
*Q800
**Q601
Q701,702
Page-49-
December 98
MAXON SM-2000 MOBILE
COMPONENT PINOUT
Unless otherwise indicated all parts are common to the SM-2000 Series Radio.
= SM-2150/VHF
= SM-2450/UHF
BASE DIAGRAM
C
NC
A
C
A
C
C
C
MANUFACTURER'S
PART NUMBER
MMBV3401(4D)
KRS193S(F3)
REFERENCE NO.
D103-105,121
D106,125,129,801,803
Schematic
D805
1SS241(TY)
BZX84C-5V
A
MI402
MI301
A
IN5404
D127
D807,808,810,811
**D108
**D120
D124
D101,1021SV229
ZENER
Varicap Diode
A
COMMON
A
C
C
KDS181(A3)
KDS226(C3)
D402,*126,*128
D551,552
Diode Switching
A
CC
COM
*D800
C
A
C
KDS184S(B3)
A
A
C
NC
A
MMBV105
MMBD101
MMBD101
**D601
AC
C
D401
AA
D701
D107
D702
Page-50-
December 98
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2150/VHF)
VOLTAGE CHARTS (SM-2150/VHF)
IC409
PIN DESCRIPTION TX RX PIN DESCRIPTION TX RX
1 DATA 0 0 21 CH-4
2 EEPROM ENABLE 0 0 22 CH-8
3 PLL ENABLE 5 5 23 MONITOR 5 5/0
4 CHANNEL SPACING 5/0 5/0 24 PTT 0 3.9
5 DATA IN 0 0 25 PROG. ENABLE 5 5
6 RED L.E.D. 5 0 26 TX ENABLE 5 0
7 BUSY 5/0 0 27 ALERT TONE 0 0
8 EXT OPTION 5 5 28 MF6 CLK CL CL
9 HOOK SW 0/3.7 0/3.7 29 CALL DETECT 0 0
10 LOCK DET 0 0 30 SEND UP CONTROL 0 0
11 TEST 5 5 72 GND 0 0
12 X1 5 5 73 VCC 5 5
13 X2 (OPEN) 0 0 74 OSC1 2.3 2.3
14 GND 0 0 75 OSC2 2.3 2.3
15 D TO A 5/0 0 76 RESET 0 0
16 D TO A 5/0 0 77 AUDIO ENABLE 5 5/0
17 TONE ENABLE 5/0 0 78 GREEN L.E.D. 0 5
18 D TO A 5/0 0 79 RX ENABLE 0 5
19 CH-1 80 CLK
20 CH-2
IC411
PIN 1 2 3 4 5 6 7 8
RX VOLTAGE 0 4 1.9 1.9 0 0 0 0
TX VOLTAGE 0 1.2 1.9 2.75 2.75 0 0 2
PIN 9 10 11 12 13 14 15 16
RX VOLTAGE 5 5 0 1.9 3.7 1.9 0.5 5
TX VOLTAGE 0 0 0 1.9 4 1.9 1.2 5
IC412 IC401
PIN TX RX PROGRAM PIN TX RX
100 100
200 200
3 3.7 3.7 0 3 2 1.8
4 3.7 3.7 0 4 2 2
500 550
6 GND GND 6 0 0
7 GND GND 7 0 0
8 GND GND 8 SAT 1.9 2
9 5 0 9 SAT 1.9 2
10 5 0 10 0 0
11 5 0 11 0 0
12 0 0 12 0 5
13 0 3.8 3.6 13 5 5
14 0 3.8 3.6 14 5 5
15 0 0 0
16 5 5
Page-51-
December 98
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2150/VHF)
IC404 IC407
PIN TX UNMODE RX MODE PIN NORMAL OPTION
1 1.9 VOICE 1.9 1 1.9 XT2
2 1.9 VOICE 1.9 2 0 XT2
3 1.9 VOICE 1.9 3 3.6 XT2
45 5 40XT2
5 1.9 VOICE 1.9 5 2 1.9
6 1.9 VOICE 1.9 6 5 5
7 1.9 VOICE 1.9 7 1.9 1.9
8 1.9 VOICE 1.9 8 1.05 XT2
9 1.9 VOICE 1.9 9 5 CLK
10 1.9 VOICE 1.9 10 GND GND
11 GND GND 11 5 CLK
12 1.9 VOICE 1.9 12 0 0
13 1.9 VOICE 1.9 13 2 1.9
14 1.9 VOICE 1.9 14 2 1.9
IC405 IC410
PIN TX RX PIN BUSY RX
1 1.93 2.00 1 AUDIO 1.9
2 1.93 2.00 2 AUDIO 1.9
3 1.8 2.00 3 AUDIO 1.9
40 0 455
5 1.92 2.00 5 AUDIO 1.9
6 1.92 2.00 6 AUDIO 1.9
7 1.92 2.10 7 AUDIO 1.9
8 5.00 5.00 8 AUDIO 1.9
IC406 9 AUDIO 1.9
PIN TX RX 10 AUDIO 1.9
1 3.05 AF 1.05 11 GND GND
2 1.9 1.9 12 AUDIO 1.9
3 1.9 1.9 13 AUDIO 1.9
4 5 5 14 AUDIO 1.9
5 1.9 1.9
6 1.9 1.9
7 1.9 1.9
8 1.9 1.9
9 1.9 1.9 PIN 1 2 3
10 1.9 1.9 IC107 13.7 0 8
11 GND GND IC105/402 8 0 5
12 1.9 1.9
13 1.9 1.9
14 1.9 1.9
IC107 IC105 IC402
Page-52-
December 98
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2150/VHF)
IC109
PIN 1 2 3 4 5 6 7 8
BUSY 7 OSC 6 7.2 6 6 6 7.2
RX (MUTE) 7 OSC 6 7.2 6 6 6 7.2
PIN 9 10 11 12 13 14 15 16
BUSY AUDIO 0.8 NOISE 2.5 7 4.5 GND 2
RX (MUTE) AUDIO 0.8 NOISE 0 7 0 GND 2
IC101
PIN 1 2 3 4 5 6 7 8
RX VOLTAGE 0 5 5 5 5 PD GND 0
TX VOLTAGE 2.5 5 5 5 0 0 2
PIN 9 10 11 12 13 14 15 16
RX VOLTAGE 5 2 2.7 5 3.5 5 0 0
TX VOLTAGE 2.7 3 2.7 5 3.5 5 0 0
PIN 17 18 19 20
RX VOLTAGE 5 0 0 OSC
TX VOLTAGE 5 0 0 2.3
TRANSISTOR VOLTAGE CHART
REF.NO B C E B C E
Q108 7.5 3.5 GND 0 3.5 GND
Q113 0.7 2.5 1.5 0.7 2.5 1.3
Q114 3.1 5 2.3 3.1 5 2.3
Q116 0 0 0 2 7 1.2
Q117 0 0 0 0.7 7.2 GND
Q125 12 13.72 13.7 12 12.5 13.2
Q106 7 2.5 GND 1 1.5 GND
Q140 0 7.5 GND 5 0 GND
Q130 0.7 5 0 0 2.5 0
Q122 8 0 8 7.3 8 8
Q121 0 8.1 0 5 0 GND
Q127 5 0 GND
Q128 0 8 8
Q120 0 13.8 GND 0 13.8 GND
Q118 0 9.5 GND 0 6 GND
Q139 7.5 0 8 0 8 8
RX TX
Page-53-
December 98
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2450/UHF)
VOLTAGE CHARTS (SM-2450/UHF)
IC409
PIN DESCRIPTION TX RX PIN DESCRIPTION TX RX
1 DATA 0 0 21 CH-4
2 EEPROM ENABLE 0 0 22 CH-8
3 PLL ENABLE 5 5 23 MONITOR 5 5/0
4 CHANNEL SPACING 5/0 5/0 24 PTT 0 3.9
5 DATA IN 0 0 25 PROG. ENABLE 5 5
6 RED L.E.D. 5 0 26 TX ENABLE 5 0
7 BUSY 5/0 0 27 ALERT TONE 0 0
8 EXT OPTION 5 5 28 MF6 CLK CL CL
9 HOOK SW 0/3.7 0/3.7 29 CALL DETECT 0 0
10 LOCK DET 0 0 30 SEND UP CONTROL 0 0
11 TEST 5 5 72 GND 0 0
12 X1 5 5 73 VCC 5 5
13 X2 (OPEN) 0 0 74 OSC1 2.3 2.3
14 GND 0 0 75 OSC2 2.3 2.3
15 D TO A 5/0 0 76 RESET 0 0
16 D TO A 5/0 0 77 AUDIO ENABLE 5 5/0
17 TONE ENABLE 5/0 0 78 GREEN L.E.D. 0 5
18 D TO A 5/0 0 79 RX ENABLE 0 5
19 CH-1 80 CLK
20 CH-2
IC411
PIN 1 2 3 4 5 6 7 8
RX VOLTAGE 0 4 1.9 1.9 0 0 0 0
TX VOLTAGE 0 1.2 1.9 2.75 2.75 0 0 2
PIN 9 10 11 12 13 14 15 16
RX VOLTAGE 5 2 2.7 5 3.5 5 0
TX VOLTAGE 0 3 2.7 5 3.5 5 0 0
IC412 IC401
PIN NORMAL PROGRAM PIN TX RX
10 0 100
20 0 200
30 0 321
40 0 422
50 0 550
6 GND GND 6 5 5
7 GND GND 7 0 0
8 GND GND 8 SAT 2
9 5 0 9 SAT 2
10 5 0 10 0 0
11 5 0 11 0 0
12 0 0 12 0 0
13 3.6 3.6 13 5 5
14 3.6 3.6 14 5 5
15 0 0
16 5 5
Page-54-
December 98
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2450/UHF)
IC404 IC407
PIN TX UNMODE RX MODE PIN NORMAL OPTION
1 1.9 VOICE 1 1.9 XT2
2 1.9 VOICE 2 0 XT2
3 1.9 VOICE 3 0 XT2
45 5 43XT2
5 1.9 VOICE 5 2 1.9
6 1.9 VOICE 6 5 5
7 1.9 VOICE 7 1.9 1.9
8 1.9 VOICE 8 0 XT2
9 1.9 VOICE 9 5 CLK
10 1.9 VOICE 10 GND GND
11 GND GND 11 5 CLK
12 1.9 VOICE 12 0 0
13 1.9 VOICE 13 2 1.9
14 1.9 VOICE 14 2 1.9
IC405 IC410
PIN TX RX PIN BUSY RX
1 1.93 2.00 1 AUDIO 1.9
2 1.93 2.00 2 AUDIO 1.9
3 1.8 2.00 3 AUDIO 1.9
40 0 45 5
5 1.92 2.00 5 AUDIO 1.9
6 1.92 2.00 6 AUDIO 1.9
7 1.92 2.10 7 AUDIO 1.9
8 5.00 5.00 8 AUDIO 1.9
IC406 9 AUDIO 1.9
PIN TX RX 10 AUDIO 1.9
1 AF 11 GND GND
2 1.9 1.9 12 AUDIO 1.9
3 1.9 1.9 13 AUDIO 1.9
4 5 1.9 14 AUDIO 1.9
5 1.9 1.9
6 1.9 1.9
7 1.9 1.9
81.9PIN123
9 1.9 IC107 13.2 0 8
10 1.9 1.9 IC105/402 5 0 8
11 GND GND
12 1.9 1.9
13 1.9 1.9
14 1.9 1.9
IC107 IC105 IC402
Page-55-
December 98
MAXON SM-2000 MOBILE
VOLTAGE CHARTS (SM-2450/UHF)
IC109
PIN 1 2 3 4 5 6 7 8
BUSY 7 OSC 6 7.2 6 6 6 7.2
RX (MUTE) 7 OSC 6 7.2 6 6 6 7.2
PIN 9 10 11 12 13 14 15 16
BUSY AUDIO 0.8 NOISE 0.6 7 0 GND 2
RX (MUTE) AUDIO 0.8 NOISE 1.8 7 8 GND 2
IC101
PIN 1 2 3 4 5 6 7 8
VOLTAGE 0 5 5 5 5 PD GND 0
PIN 9 10 11 12 13 14 15 16
VOLTAGE TEST 2 2 5 OSC 5 0 0
PIN 17 18 19 20
VOLTAGE 5 0 0 OSC
TRANSISTOR VOLTAGE CHART
RX TX
REF.NO B C E B C E
Q108 1.2 3.5 0.6 1.2 3.5 0.6
Q110 0.6 1.8 GND 0.6 1.8 GND
Q111 3.6 4.3 2 3.6 4.3 2
Q113 0.7 2.5 GND 0.7 2.5 GND
Q114 3.1 5 2.3 3.1 5 2.3
Q116 1.5 7.5 1.2
Q117 0.7 7.5 GND
Q125 12 12.5 13.2
Q106 2 5 1.4 2 5 1.4
Q140 5 0 GND
Q119 0 8 8
Q130 0.5 5 0
Q122 7 6.7 6.8
Q121 5 0 GND
Q127 5 0 GND
Q128 0 8 8
Page-56-
December 98
MAXON SM-2000 MOBILE
TROUBLE SHOOTING CHART (SM-2000)
TROUBLE SHOOTING CHART (SM-2000)
Status Indications & Audible Tones
STATUS DESCRIPTION LED COLOR AUDIBLE TONE
Power on ready N/A Melody
Busy Yellow N/A
NORMAL
WARNING
ERROR
Unit Does Not Program
Correct Tone Green N/A
Transmit Red N/A
Scan Green, Flashing N/A
Busy Lock Yellow, Flashing Single Tone
Time Out Timer N/A Single Tone
Battery Low Red, Flashing Four Tone, Repeated
EEPROM Error Red, Flashing Single Tone Repeated
PLL Error Red, Flashing Double Tone Repeated
Filtering Error Red, Flashing Three Tone Repeated
1. Defective Programming Lead
2. Wrong Programming Mode
3. Defective MIC Connector
4. Defective IC412
Unit Does Not Work
No Output from Speaker
Squelch Does Not Work
No Sub Audio Decode
CTCSS/DCS
1. Open DC fuse in Power Cable
2. Defective Volume Switch
3. Defective Regulator IC107, 105, 402
4. Broken DC Cable
1. Defective internal speaker and external jack
2. Defective IC108
3. Defective VR801
1. Wrong alignment of squelch resistor RV103
2. Defective IC109
3. Defective CPU IC409
1. Wrong Programming
2. Defective Switch Filter IC406 (MF-6)
3. Defective CPU IC409
Page-57-
December 98
MAXON SM-2000 MOBILE
TROUBLE SHOOTING CHART (SM-2000)
No TX
1. Defective MIC
2. Defective CPU IC409
3. Defective IC412
No TX Power
1. Defective TX enable Q122
2. Defective APC Control Circuit Q125
3. Defective TX Power Buffer AMP Q116 and Q117
4. Defective TX Power Amp (SM-2150) Q118,Q120
5. Defective TX Power Module (SM-2450) IC103
6. Defective ANT SW D108 and D120
7. Defective ANT Connector
Over Power
1. Programming
2. Q125 Short
3. Defective D107 and APC Circuit
Low TX Power Output
1. Wrong Programming
2. Defective TX AMP (SM-2150) Q116 , Q117 , Q118, Q120 and D108
3. Defective TX AMP (SM-2450) Q116 , Q117 , IC103 , and D108
4. Defective Antenna Connector
No Modulation
No Encode of CTCSS/DCS
No Sensitivity
Wrong Frequency
1. Defective MIC
2. Defective Analog SW IC412 and IC411
3. Defective 300Hz HPF IC410
4. Defective MIC AMP and Splatter Filter IC404
5. Defective Audio Buffer IC405
6. Wrong Alignment of RV402
7. Defective Analog IC401
1. Wrong Programming
2. Defective CPU IC409
3. Defective IC407 and IC411
1. Defective Antenna Switch D108 , D120 , and D121
2. Defective Front-End Module
3. Defective DBM IC102
4. Defective 45MHz IF Filter CF101
5. Defective IF IC109
1. Wrong Alignment of 12.8MHz TCXO
2. Wrong Programming
Page-58-
December 98
REPLACEMENT MODULE SCHEMATICS
D701
MMBV
105
R705
47K
C701
100pF
R706
47K
D702
MMBV109
C702
100pF
12.8MHz
R707
47K
TC701
20pF
R708
47K
X701
R709
39K
C703
91pF
R710
2.2K
R711
4.7K
C705
100pF
Q701
MMBR9426
C704
180pF
R713
47K
R712
39K
R715
2.2K
R714
2.2K
Q702
MMBR9426
C706
220pF
4
C821
6.8P
RF OUT
6
27P
6.8P 7P
15P
C815
C816
C818
C819
5
L806
4T
C817
18P
L805
4T
C823
18P
C822
18P
L807
4T
C820
N/A
C814
12P
C813
18P
C824
L804
4T
Q801
2SC5084
R801
56K
C810
0.001
C808
C803
C802
8P
11P
IN
1
20P
7P
7P
C805
C806
2
C809
D801
KDS226
C812
RX 5V
470P
R802
100
4 3
4P
C807
20P
N/A
L803
4T
L802
C804
20P
4T
L801
C801
4T
10P
TH701
10K
2
R702
R701
*
1
L804
C814
34
C813
33P
6T
33P
R803
2.2
Q800
MMBR951
R802
3.3K
C812
39P
R801
6.8K
R800
820
C811
100P
L803
6T
D800
KDS226
C808
100P
C807
33P
C806
L802
C805
6P
6T
C804
L801
6T
C803
33P
C802
100P
L800
39P
6T
C801
C800
560P
1
2
C816
L806
6T
C818
100P
C817
56P
0.001
(470)
L805
R804
180
6T
C815
150P
6
5
C821
270P
C822
39P
TH703
150K
*
R704
R703
*
TH702
33K
LK701
*
3
SM-2150/VHF FRONT-END
770-110-0002 Rev. B
(VHF Band 2 shown)
SM-2000 TCXO
770-100-0002 Rev. C
SM-2450/UHF FRONT-END
770-110-0001 Rev. B
(UHF Band 2 shown)
Note 1: Schematics are for reference only. Reference designators and part values may not reflect product configuration.
Note 2: Refer to band chart for specific Front-End PCB assemblies.
Page-59-
December 98
MIC901
MIC
HOOK
+
-
C901
0.001(M)
C903
470P
RX
L901
1MH
PTT SWITCH
CORD901
B+ (RED)
N/C
N/C
TX
1
5
3
2
6
4
TEL PLUG
GROUND (GREEN)
AUDIO (WHITE)
TX (YELLOW)
AUDIO GND (SHIELD)
MON/HOOK (BLACK)
SW1
SW2
SP
GND
VRT2
CS
C821
0.001
CURRENT LIMITER
R821
22
Q821
KRA1504S
Q822
KRA1504S
R822
4.7K
C823
10/25(E)
C808
47P
VR801
10KR
C815
470P
SW POW ER
SP1
4OHM
4W
PTT
MIC
HANGER
13.8
6
VRT 1
D807
5.1V
D808
5.1V
D810
5.1V
D811
5.1V
C801-805
47P
PTT
MIC
HANGER
CS
CON801
5
4
3
2
1
MIC
SM-2000
MA-4472 MICROPHONE SCHEMATIC
770-090-0003
C807
47P
8V
MONITOR
LED GRN
LED RED
CALL
BCD 1
BCD 8
BCD 4
BCD 2
GND
R801
470
LED1
KDS193
D801
KDS193
D802
LED2
D804
KDS184
D803
KDS193
LED3
LED4
TX/CALL/BUSY
LED 5
SM-2000
LK1
LK2
LK3
4CH
3CH
2CH
1CH
CH SW
SW3
AUX
SW405
LK4
C806
47P
SW4
MONITOR
C809
47P
Page-60December 98
CONTROL HEAD SCHEMATIC
770-050-0003 Rev. B
REV
RELEASED TO MANUFACTURING
A
REVISIONS
DESCRIPTIONDESCRIPTION
CHG BY
JPW 9/96
DATE
DIMENSIONS ARE IN MILLIMETERS
HOLES
+
-
NA
DWN
CHK
PROD ENGR
UNLESS OTHERWISE NOTED
TOLERENCES:
LINEAR
+
.XX
-
.XXX
NA
+
-
V0100003.CDR
CORELDRAW
09-10-96
R
ANGLES
+
NA
-
DATE
DATE
DATE
A World of Communications
10828 NW Air World Drive
TITLE
Kansas City, Missouri 64153
SM-2000 BLOCK DIAGRAM
DOCUMENT
NUMBER
060-010-0003
SCALE
NA
SHEET
SIZE
B
OF
1
1
Page-61-
December 98
REV
RELEASED TO MANUFACTURING
A
ECO 97014 Change to Sheet 1, Digital Section Only
B
ECO 97020
C
ECO 98017 Change to Sheet 2, RF Section Only
DD
REVISIONS
DESCRIPTIONDESCRIPTION
CHG BY
JPW
JPW
JPW
JPW
11/9 8
DATE
9/96
4/97
4/97
Page-62December 98
DIMENSIONS ARE IN MILLIMETERS
HOLES
+
-
NA
DWN
CHK
PROD ENGR
UNLESS OTHERWISE NOT ED
TOLERENCES:
LINEAR
+
.XX
-
.XXX
NA
+
-
DIGITAL.DWG
AUTOCAD R13c4
11-18-98
R
ANGLES
+
NA
-
DATE
DATE
DATE
TITLE
DOCUMENT
NUMBER
SCALE
A World of Communications
10828 NW Air World Drive
Kansas City, Missouri 64153
SM-2000
MAIN BOARD SCHEMATIC
(DIGITAL SECTION)
770-000-0001 VHF
770-000-0002 UHF
NA
SHEET
SIZE
OF
1
B
2
REV
RELEASED TO MANUFACTURING
A
ECO 97014 Change to Sheet 1, Digital Section O nly
B
ECO 97020
C
ECO 98017 Change to Sheet 2, RF Sec tion Only
DD
REVISIONS
DESCRIPTIONDESCRIPTION
CHG BY
JPW
JPW
JPW
JPW
11/9 8
DATE
9/96
4/97
4/97
DIMENSIONS ARE IN MILLIMETERS
HOLES
+
-
NA
DWN
CHK
PROD ENGR
UNLESS OTHERWISE NOTED
TOLERENCES:
LINEAR
+
.XX
-
.XXX
NA
+
-
770-000-0001revD.DWG
AUTOCAD R13c4
12-05-98
R
ANGLES
+
NA
-
DATE
DATE
DATE
TITLE
DOCUMENT
NUMBER
SCALE
A World of Communications
10828 NW Air World Drive
Kansas City, Missouri 64153
SM-2150/VHF
RF SCHEMATIC DIAGRAM
770-000-0001
NA
SHEET
SIZE
OF
2
B
2
Page-63-
December 98
REV
RELEASED TO MANUFACTURING
A
REVISIONS
DESCRIPTIONDESCRIPTION
CHG BY
JPW 9/96
DATE
Page-64December 98
DIMENSIONS ARE IN MILLIMETERS
HOLES
+
-
NA
DWN
CHK
PROD ENGR
UNLESS OTHERWISE NOTED
TOLERENCES:
LINEAR
+
.XX
-
.XXX
NA
+
-
R
ANGLES
+
NA
-
DATE
DATE
DATE
TITLE
DOCUMENT
NUMBER
SCALE
A World of Communications
10828 NW Air World Drive
Kansas City, Missouri 64153
SM-2450/UHF
RF SCHEMATIC DIAGRAM
770-000-0002
NA
SHEET
SIZE
OF
2
B
2
LED4
LED3
LED2
LED1
SPKR
SW5
D804
D801
D805
R801
C807
SW4
SW3
LED5
CON801
SM-2000 CONTROL HEAD
650-050-0003
C283
SW2
SM-2000 CONTROL HEAD
650-050-0003
C809
Page-65-
December 98
RVC01
Page-66December 98
SM-2150/VHF MAIN BOARD ASSY.
650-000-0001
SM-2150/VHF MAIN BOARD ASSY.
650-000-0001
D124
+
CON
R219
D127
Q135
Q219
Q134
C127
R117
R120
Q108
R121
C136
L103
C138
R122
C137
R112
C120
R111
C113
R110
R105
R104
R102
C110
C108
Q553Q554
Q552
R555
R559
R423
C442
R453
C443
R454
R456
C464
C445
R455
C181
L227
T101A
R196A
R210
RV102
C133
C134
R118
C135
C130
TC101
R115R115
C558 C407
C409
R405
R402
TP2
R404
C424
R457
LK6
LK7
X401
Q407
R437
Q405
Q406
R460
LK1
D402
R433
LK5
LK12
LK13
LK2
R429
LK9
LK14
LK10
R148
R181
ANT
T104
PWR
-
IC103
C233
D120
D120A
D108
C256
PWR1
RV104
C261 C262
C258
C260
C257
D108A
C226
C224
RV105
R176
C279
PWR2
FB1
C238
C152
C222
C221
R175
Q125
C218
C250
IC108
IC107
FRONT
C232
Q122
IC407
C404
IC402
C435
L225
R142
R143
C142
C239
IC406
RV402
R411
CF103
T101
T102
IC102
C146
C147
C428
R462
R465
R464
R463
R434
Q121
R436
LK11
R444
R416
IC404
LK15
CF104
CF102
CF101
C199
Q550
R551
C550
IC411
R431
R415
C417
C403
C126
R128
L104
R106
R103
Q103
C189
C559
R430
X101
R125
L107
R114
R550
R428
IC409
C454
C453
R448
R446
C447
R459
C187
C186
C185
C184
L226
C124
C125
C128
C141
Q107
Q110
R123
R124
R126
Q111
C140
R127
C143
C114
C210
R108
Q104
Q102
R107
Q101
R100
C111C122
R113
C121
Q105
D551
C552
C555
R556
D552
R553
Q551
C554
R552 C551
IC401 IC412
R473
R427
R426
T103
TP1
C553
R554
LK3
C438
IC410
RV103
L102
L101
C422
C568
R461
R435
D401
D102
D101
PLL1
D403
R403
RV403
R458
C423
R438
LK4
L229
RVCO1CABLE1
C405
C437
CON403
CON401
LK8
CON404
L228
TH101
R196
RV101
C113A
TCXO1
L113
IC405
IC408
C367
SM-2450/UHF MAIN BOARD ASSY.
650-000-0002 Rev. C
SM-2450/UHF MAIN BOARD ASSY.
650-000-0002 Rev. C
Page-67-
December 98
Page-68December 98
SM-2000
EXPLODED VIEW
SM-2150/VHF EXPLODED VIEW PARTS LIST
REF # PART # DESCRIPTION QTY
1 801-282-A E.S.C NORYL N190J-7002 1
2 905-510 FELT 30-R16.5 (2) XT0.3 FELT BLK 1
3 795-654 OVERLAY LEXAN T0.5 1
4 826-137 KNOB (FOR VOL) ABS 94HB BLK 1
5 826-120 KNOB (FOR CH) ABS 94HB BLK 1
6 650-346 NUT RING (FOR VOL) M7X0.75 (P) &9.9 BSBM 1
7 650-335 NUT RING (FOR CH) M9X0.75 (P) &11 BSBM 1
8 661-701 WASHER (FOR VOL) T0.5 SPC 1
9 662-901 WASHER (FOR CH) 13X9.3XT0.5 SPC 1
10 894-650 RING (FOR VOL) &10X&6.9XT0.8 SILI.RUBB BLK 1
11 895-095 RING (FOR CH) &9.3X&12.5 CR BLK 1
12 611-388 (+) MACHINE SCREW (FH) M3X8 (+) FH BLK 2
13 895-040 KEY PAD SILICONE RUBBER 1
14 420-709-9 JACK MODULAR 1130-662 1
15 650-050-0003 CONTROL HEAD P.C.B. ASSY. 1
16 420-108-4A SPEAKER 4 OHM 5.0W 71MM PB7401A3Y26 1
17 623-034 (+) TAPPING SCREW (PH) T3X6-1S (+) PH ZN-PLAT 3
18 853-078 POST BSBM NI-PLAT 1
19 752-732 PLATE (ESC MTG) SPC T2 1
20 613-174 (+) MACHINE SCREW (FH) M3X5 (+) FH NI-PLAT 1
21 622-039 (+) TAPPING SCREW (BH) T2X6-1S (+) BH ZN-PLAT 2
22 895-044 GASKET (ESC) CR BLK 1
23 702-416-AB FRAME ALDC12 (SM-2450) 1
24 623-760 (+) TAPPING SCREW (BH) T3X18-2S (+) BH NI-PLAT 2
25 427-411-4 WIRE EMI GASKET 43SM15 (SM-2450) 1
26 427-411-4A WIRE EMI GASKET 43SM20 (SM-2450) 1
27 772-181 SHIELD CAN SPTE T0.3 1
28 723-844 BRACKET TR SK5 T0.5 NI-PLAT 2
29 895-047 GASKET (EXT JACT) CR BLK 1
30 613-040-S (+) MACHINE SCREW (PH) M3X6 (+) PH ZN-PLAT 1 12
31 650-000-0001 MAIN P.C.B. ASSY. SM-2150/VHF 1
32 772-298 SHIELD COVER SPTE T0.5 1
33 752-729 CLIP (FOR TR) SUS304 T0.5 1
34 772-243 SHIELD CAN NSP T0.3 1
35 895-041 RING CR BLK 1
36 421-677-7 CONNECTOR BOX SOCKETBCS-110-P-D-HE 1
37 772-179 SHIELD CASE (FOR VCO) 1
38 613-755-SF (+) MACHINE SCREW (PH) M3X7 (+) PH NI-PLAT 4
39 895-043 GASKET (BRKT) CR BLK 1
40 723-823 BRACKET ALDC12 1
41 612-289 (+) MACHINE SCREW (BH) M2X5 (+) BH BLK 6
42 504-367-B 2P PLUG ASS’Y SH-50101 (SM-2450) 1
43 719-020 COVER TOP ALDC12 1
44 895-075 RUBBER WASHER &6.2X&3.1XT0.5 N.B.R BLK 4
45 660-449 WASHER 6X3.2X0.5T SPC NI-PLAT 4
46 613-764 (+) MECHINE SCREW (PH) M3X20 (+) PH SUS 4
47 893-700 FOOT &11X5 RUBB.STIC. 4
48 613-369 (+) MACHINE SCREW (BH) M3X15 (+) BH ZN-PLAT 1
49 508-085-A MIC BRACKET ASS’Y 1
50 660-449 WASHER 6X3.2X0.5T SPC NI-PLAT 2
51 662-310 WASHER SPRING M3 NI-PLAT 2
52 613-299 (+) MACHINE SCREW (BH) M3X6 (+) BH NI-PLAT 2
53 723-834 BRACKET SPC T2.0 1
54 600-051 SECURING SCREW M6X9 (P:1) BLK 2
55 661-605 WASHER FLAT M6 ZN-PLAT 2
56 662-606 WASHER SPRING M6 ZN-PLAT 2
57 625-007 (+) TAPPING SCREW (TH) T5X12-1S (+) TH ZN-PLAT 2
58 772-241 SHIELD PLATE SPTE T0.3 1
59 772-242 SHIELD CAN SPTE T0.5 1
60 772-132-A SHIELD CAN (FR-P) NSP T0.2 1
61 752-769 FINGER STRIP SUS304 T0.3 1
62 895-247 CAP (FOR EXT. JACK) 1
63 662-305 WASHER SPRING M3 ZN-PLAT 4
SM-2450/UHF EXPLODED VIEW PARTS LIST
REF # PART # DESCRIPTION QTY
1 801-282-A E.S.C NORYL N190J-7002 1
2 905-510 FELT 30-R16.5 (2) XT0.3 FELT BLK 1
3 795-654 OVERLAY LEXAN T0.5 1
4 826-137 KNOB (FOR VOL) ABS 94HB BLK 1
5 826-120 KNOB (FOR CH) ABS 94HB BLK 1
6 650-346 NUT RING (FOR VOL) M7X0.75 (P) &9.9 BSBM 1
7 650-335 NUT RING (FOR CH) M9X0.75 (P) &11 BSBM 1
8 661-701 WASHER (FOR VOL) T0.5 SPC 1
9 662-901 WASHER (FOR CH) 13X9.3XT0.5 SPC 1
10 894-650 RING (FOR VOL) &10X&6.9XT0.8 SILI.RUBB BLK 1
11 895-095 RING (FOR CH) &9.3X&12.5 CR BLK 1
12 611-388 (+) MACHINE SCREW (FH) M3X8 (+) FH BLK 2
13 895-040 KEY PAD SILICONE RUBBER 1
14 420-709-9 JACK MODULAR 1130-662 1
15 650-050-0003 CONTROL HEAD P.C.B. ASSY. 1
16 420-108-4A SPEAKER 4 OHM 5.0W 71MM PB7401A3Y26 1
17 623-034 (+) TAPPING SCREW (PH) T3X6-1S (+) PH ZN-PLAT 3
18 853-078 POST BSBM NI-PLAT 1
19 752-732 PLATE (ESC MTG) SPC T2 1
20 613-174 (+) MACHINE SCREW (FH) M3X5 (+) FH NI-PLAT 1
21 622-039 (+) TAPPING SCREW (BH) T2X6-1S (+) BH ZN-PLAT 2
22 895-044 GASKET (ESC) CR BLK 1
23 702-416-AB FRAME ALDC12 (SM-2450) 1
24 623-760 (+) TAPPING SCREW (BH) T3X18-2S (+) BH NI-PLAT 2
25 427-411-4 WIRE EMI GASKET 43SM15 (SM-2450) 1
26 427-411-4A WIRE EMI GASKET 43SM20 (SM-2450) 1
27 772-181 SHIELD CAN SPTE T0.3 1
28 723-844 BRACKET TR SK5 T0.5 NI-PLAT 2
29 895-047 GASKET (EXT JACT) CR BLK 1
30 613-040-S (+) MACHINE SCREW (PH) M3X6 (+) PH ZN-PLAT 1 11
31 650-000-0002 MAIN P.C.B. ASSY. SM-2450/UHF 1
32 771-989 SHIELD COVER SPTE T0.5 1
33 752-729 CLIP (FOR TR) SUS304 T0.5 1
34 772-243 SHIELD CAN NSP T0.3 1
35 895-041 RING CR BLK 1
36 421-677-7 CONNECTOR BOX SOCKETBCS-110-P-D-HE 1
37 772-179 SHIELD CASE (FOR VCO) 1
38 613-755-SF (+) MACHINE SCREW (PH) M3X7 (+) PH NI-PLAT 4
39 895-043 GASKET (BRKT) CR BLK 1
40 723-823 BRACKET ALDC12 1
41 612-289 (+) MACHINE SCREW (BH) M2X5 (+) BH BLK 6
42 504-367-B 2P PLUG ASS’Y SH-50101 (SM-2450) 1
43 719-020 COVER TOP ALDC12 1
44 895-075 RUBBER WASHER &6.2X&3.1XT0.5 N.B.R BLK 4
45 660-449 WASHER 6X3.2X0.5T SPC NI-PLAT 4
46 613-764 (+) MECHINE SCREW (PH) M3X20 (+) PH SUS 4
47 893-700 FOOT &11X5 RUBB.STIC. 4
48 613-369 (+) MACHINE SCREW (BH) M3X15 (+) BH ZN-PLAT 1
49 508-085-A MIC BRACKET ASS’Y 1
50 660-449 WASHER 6X3.2X0.5T SPC NI-PLAT 2
51 662-310 WASHER SPRING M3 NI-PLAT 2
52 613-299 (+) MACHINE SCREW (BH) M3X6 (+) BH NI-PLAT 2
53 723-834 BRACKET SPC T2.0 1
54 600-051 SECURING SCREW M6X9 (P:1) BLK 2
55 661-605 WASHER FLAT M6 ZN-PLAT 2
56 662-606 WASHER SPRING M6 ZN-PLAT 2
57 625-007 (+) TAPPING SCREW (TH) T5X12-1S (+) TH ZN-PLAT 2
58 772-241 SHIELD PLATE SPTE T0.3 1
59 772-242 SHIELD CAN SPTE T0.5 1
60 772-132-A SHIELD CAN (FR-P) NSP T0.2 1
61 752-769 FINGER STRIP SUS304 T0.3 1
62 895-247 CAP (FOR EXT. JACK) 1
63 662-305 WASHER SPRING M3 ZN-PLAT 4
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