Standard Horizon Quest-X GX1500S User manual

1
SERVICE MANUAL
25 Watt VHF/FM Marine Transceiver
QUEST-X GX1500S
EM017N90A

2
Specifications
GENERAL
Channels: All USA, International, and Canadian
Input Voltage: 13.8 VDC ±20%
Current Drain: Standby 0.4 A
Receive 1.5 A
Transmit 5.5 A (Hi); 1.5 A (Lo)
Dimensions (H x W x D): 3.1” x 7” x 5.7” (80 x 180 x 145 mm)
Flush-Mount Dimensions (H x W x D): 2.5” x 6.3” x 5.1” (64 x 160 x 130 mm)
Weight: 2.2 lbs (1 kg)
TRANSMITTER
Frequency Range: 156.025 to 157.425 MHz
RF Output: 25 W (Hi); 1 W (Lo)
Conducted Spurious Emissions: 80 dB (Hi); 60 dB (Lo)
Audio Response: within +1/–3 of a 6 dB/octave pre-emphasis characteristic at 300 to 3000 Hz
Audio Distortion:5%
Modulation: 16K0G3E, for DSC 16K0G2B
Frequency Stability: ±0.0005% (–20°C to +50°C)
FM Hum and Noise: 50 dB
RECEIVER
Frequency Range: 156.050 to 163.275 MHz
Sensitivity: 12 dB SINAD 0.25 µV
12 dB SINAD (70 CH Receiver) 0.3 µV
Squelch Sensitivity (Threshold) 0.2 µV
Modulation Acceptance Bandwidth: ±7.5 kHz
Selectivity: better than –80 dB (Spurious and Image Rejection)
better than –75 dB (Intermodulation and Rejection at 12 dB SINAD)
Audio Output: 4.5 W
Audio Response: within +2/–8 of a 6 dB/octave de-emphasis characteristic at 300 to 3000 Hz
Frequency Stability: ±0.0005 % (–20°C to +50°C)
Channel Spacing: 25 kHz
DSC Format: ITU Class D
NMEA Input/Output: Output - DSC, DSE
Input - GLL, GGA, RMC, and GNS
Performance specifications are nominal, unless otherwise indicated, and are subject to change without notice.
Measurements are made in accordance with EN301 025. All stated specifications are subject to change without notice or obligation.

Exploded View & Miscellaneous Parts
3
REF.










QTY.
2
6
2
5
4
7
4
4
1
2
VXSTD P/N
U05212020
U05307020
U20306020
U24208001
U24212020
U24306002
U24308002
U24316002
U24316020
U70002001
DESCRIPTION
CAP SCREW TM2.6X10SUS
CAP SCREW TM3X7SUS
BINDING HEAD SCREW M3X6SUS
TAPTITE SCREW M2.6X8
TAPTITE SCREW 2.6X12SUS
TAPTITE SCREW M3X6NI
TAPTITE SCREW M3X8NI
TAPTITE SCREW M3X16NI
TAPTITE SCREW M3X16SUS
PLAIN WASHER FW2.6
Non-designated parts are available only as
part of a designated assembly.
DESCRIPTION
PANEL COVER
DC CABLE
MIC HOLDER (WHITE)
MIC HOLDER (BLACK)
MOBILE BRACKET (WHITE)
MOBILE BRACKET (BLACK)
BRACKET SCREW (WHITE)
BRACKET SCREW (BLACK)
SCREW SET
VXSTD P/N
RA0777900
T9023306
RA0436000
RA0458800
RA0784100
RA0784000
RA043770A
RA045910A
U9900147
ACCESSORIES










A
B
C
D
E
F
G
H
I
J







A
B
C
E
F
HDI
J
















G
MIC UNIT
RA0757100 (WHITE)
RA0757200 (BLACK)
FRONT CASE
CNTL UNIT
RAM UNIT
MAIN UNIT
RA0745700 (WHITE)
RA0745800 (BLACK)
REAR CASE
RA0747000
WEIGHT (MIC)
RA0684000
LOCK PLATE
RA0746100
HOLDER (PTT)
RA0746000
PTT KNOB
RA0745900
RUBBER KNOB
RA0748300
MIC HOLDER RUBBER
RA0292100
SHEET
T9207247 (WHITE)
T9207249 (BLACK)
WIRE ASSY (CURL CABLE)
RA0746700
O RING
RA0746800
RUBBER PACKING
RA0747100 (WHITE)
RA0765100 (BLACK)
HOOK
CS1860001 (WHITE)
CS1860002 (BLACK)
FRONT PANEL ASSY
(w/SPEAKER, COVER ASSY (DISTRESS), and WINDOW)
RA0763500 (WHITE) (x2 pcs)
RA0757600 (BLACK) (x2 pcs)
VOLUME KNOB
RA0763600 (WHITE)
RA0757700 (BLACK)
ENCODER KNOB
RA0756600
CHASSIS
RA0756900 (x3 pcs)
PACKING PAD (KNOB)
RA0756800
RUBBER PACKING (R)
VR UNIT
RA0757400 (WHITE)
RA0758400 (BLACK)
SLEEVE
RA0756500
RUBBER KNOB (2 KEY)
RA0756400
RUBBER KNOB (7 KEY)
RA0493800
LOCK PLATE (DC CABLE)
RA0493900
RUBBER PACKING (DC CABLE)
RA0421500 (x2 pcs)
O RING (SCREW)
RA0422900
O RING
RA0684000
LOCK PLATE (MIC)
RA0756700
RUBBER PACKING (F)
RA0757800
LCD HOLDER
RA0569700
LIGHT GUIDE
RA057000A
REFLECTOR SHEET (L)
RA080350A
REFLECTOR SHEET (S)
RA0631900
INTER CONNECTOR (BOTTOM)
RA0631800
INTER CONNECTOR (TOP2)
G6090150
LCD
RA0758500
SHIELD CASE (PM)
G1094216
POWER MODULE (S-AV37) P1091172
CONNECTOR
RA0423200
LOCK PLATE
T9207265A
WIRE ASSY
T9207270
WIRE ASSY
T9207269
WIRE ASSY
RA0434100
SHEET
RA0760300
SPONGE LCD
S6000422
CAP
RA0292100
SHEET
RA0422900
O RING
CP8538001
COVER ASSY (DISTRESS)
2
3
4
1
1: Accessory with RAM Jack
2: Accessory with CH Encoder
3: Accessory with SQL Potentiometer
4: Accessory with VOL Potentiometer
T9207267
WIRE ASSY

Exploded View & Miscellaneous Parts
4
Note

5
Connection Diagram

6
Block Diagram

7
Circuit Description
Reception and transmission are switched by 16-bit MPU
IC Q2003 (M30624FGPGP) on the CNTL Unit. The re-
ceiver uses double-conversion superheterodyne circuit-
ry, with a 21.4 MHz 1st IF and 450 kHz 2nd IF. The 1st
local is produced by a PLL synthesizer, yielding the 30.4
MHz 1st IF. The 2nd local uses a 29.950 MHz crystal oscil-
lator, yielding the 450 kHz 2nd IF. The 2nd mixer and other
circuits use a custom IC to convert and amplify the 2nd IF
and detect FM to obtain demodulated signals. During
transmit, the PLL synthesizer oscillates at the desired fre-
quency directly, for amplification to obtain RF power out-
put. During transmit, voice modulation is applied to this
synthesizer. Transceiver functions, such as TX/RX control,
PLL synthesizer settings, and channel programming, are
controlled using the MPU.
Receiver
Incoming RF signals from the antenna connector are de-
livered to the RF Unit, and pass through a low-pass filter
(LPF) consisting of coils L1001 & L1002 and capacitors
C1002, C1004, & C1007, and antenna switching diode
D1004 (XB15A308) for delivery to the receiver front end.
Signals within the frequency range of the transceiver are
then passed through a bandpass filter consisting of coils
L1010 & L1013 and capacitors C1059, C1060, C1062, C1094,
& C1095, before RF amplification by Q1022 (3SK294).
The amplified RF is then passed through a bandpass filter
again consisting of coils L1027, L1028, & L1031 and ca-
pacitors C1165, C1166, C1167, C1168, C1169, C1191, &
C1192, the pure in-band input signal is delivered to 1st
mixer Q1031 (3SK131).
Buffered output from the MAIN VCO is amplified by
Q1032 (2SC5006) and low-pass filtered by coils L1038,
L1040, & L1055 and capacitors C1216, C1217, C1245, and
C1246, to provide a pure 1st local signal between 125.65
and 131.625 MHz for delivery to the 1st mixer Q1031
(3SK131).
The 30.4 MHz 1st mixer product then passes through
monolithic crystal filters XF1003 and XF1004 (±6.5 kHz
BW), and is amplified by Q1037 (2SC4400-3) and deliv-
ered to the input of the FM IF subsystem IC Q1039
(TA31136FN). This IC contains the 2nd mixer, 2nd local
oscillator, limiter amplifier, FM detector, noise amplifier,
and squelch gates.
The 2nd local in the FM IF subsystem IC is produced from
crystal X1001 (29.950 MHz), and the 1st IF is converted to
450 kHz by the 2nd mixer and stripped of unwanted com-
ponents by ceramic filter CF1001.
After passing through a limiter amplifier, the signal is
demodulated by the FM detector. Demodulated receive
audio from the FM IF subsystem IC is amplified by Q1046
and Q1050 (both 2SC4154E), then the signal is through
the AF selecor switch Q1036 (CD4066BPW). The selected
signal is passed through the AF Mute switch Q1047
(RT1N441U) to the AF power amplifier Q1048 (LA4425A),
the audio signal is delivered to the 16 Ohm internal loud-
speaker and external Speaker terminal in the accessory
cable.
PLL Synthesizer
The 1st Local signal maintains stability from the PLL syn-
thesizer by using a 29.950 MHz reference signal from crys-
tal X1001. PLL synthesizer IC Q1035 (TB31202FNG) con-
sists of a prescaler, reference counter, swallow counter,
programmable counter, a serial data input port to set these
counters based on the external data, a phase comparator,
and a charge pump.
The PLL synthesizer IC divides the 29.950 MHz reference
signal by 2396 using the reference counter (12.5 kHz com-
parison frequency). The reference oscillator feeds to the
PLL synthesizer IC Q1035 (TB31202FNG). for the 2nd lo-
cal signal.
The VCO output is divided by the prescaler, swallow
counter and programmable counter. These two signals are
compared by the phase comparator, and applied to the
charge pump.
A voltage proportional to their phase difference is deliv-
ered to the low-pass filter circuit, then fed back to the VCO
as a voltage with phase error, controlling and stabilizing
the oscillating frequency. This synthesizer also operates
as a modulator during transmit.
The MAIN VCO is consisted of Q1035 (2SK520-K41) and
varactor diodes D1015, D1016, D1017, and D1018 (all
HVC306B), which oscillates at 30.4 MHz below from the
receiving frequency. The MAIN VCO output passes
through buffer amplifier Q1032 (2SC5006) to obtain sta-
ble output, then applied to the 1st mixer Q1031 (3SK131).
The DC supply for the MAIN VCO is regulated by Q1030
(2SC4154E).
The TX & SUB VCO is consisted of Q1025 (2SK520-K4)
and varactor diode D1010, D1011, D1012, and D1013 (all
1SV286B), which oscillates at 134.225 MHz for the CH70
receiving and the fundamental transmit frequency dur-
ing a transmit, with direct frequency-modulation using
varactor diode D1009 (1SV325). The TX & SUB VCO out-
put passes through buffer amplifier Q1024 (2SC5006) to
obtain stable output. The TX & SUB VCO output is passed
through another buffer amplifier Q1020 (2SC5006) and
diode switch D1007 (DAN235U) to the sub 1st mixer Q1023
(3SK131) during receive, and to drive amplifiers Q1014
(2SC5006) for transmit. The DC supply for the TX & SUB
VCO is regulated by Q1021 (2SC4154E).

8
Circuit Description
Transmitter
Voice audio from the microphone is delivered to the
MAIN Unit. After passing through microphone amplifier
Q1002 (NJM12902V), a pre-emphasis network, limiter
(IDC: instantaneous deviation control), and low-pass fil-
ter network Q1052 (LM2902PW), the audio is adjusted
for optimum deviation level and delivered to the next
stage.
Voice or DSC (Digital Selective Calling) encode signal in-
puts from the low-pass filter network Q1052 (LM2902PW)
is by the TX & SUB VCO Q1025 (2SK520-K4) and varac-
tor diode D1010, D1011, D1012, & D1013 (all 1SV286B),
which oscillates the fundamental transmit frequency with
direct frequency-modulation using varactor diode D1009
(1SV325). The modulated signal passes through buffer
amplifier Q1024 and Q1020 (both 2SC5006), diode switch
D1007 (DAN235U) to drive amplifiers Q1014 (2SC5006)
and RF power amplifier module Q1005 (S-AV37).
The RF energy then passes through antenna switch D1002
(XB15A30B) and low-pass filter (LPF) consisting of coils
L1001 & L1002 and capacitors C1002, C1004, & C1007, and
finally to the antenna connector.
RF output power from the RF power amplifier module
Q1012 (S-AV37) is sampled by C1005 and C1006 and is
rectified by D1001 (1SS321). The resulting DC is fed
through Automatic Power Controllers Q1002
(LM2904PW) to RF power amplifier module Q1012 (S-
AV37), thus providing positive control of the power out-
put.
Generation of spurious products by the transmitter is min-
imized by the fundamental carrier frequency being equal
to the final transmitting frequency, modulated directly in
the transmit VCO. Additional harmonic suppression is
provided by a low-pass filter consisting of coils and ca-
pacitors, resulting in more than 70 dB of harmonic sup-
pression prior to delivery of the RF energy to the antenna.
DSC Encoder/ Decoder
Encoder
The DCS (Digital Selective Calling) encode signal which
D/A converted in the 16-bit MPU IC Q2003
(M30624FGPGP) on the CNTL Unit is fed through the
low-pass filter Q1052 (LM2902PW) on the MAIN Unit to
the TX & SUB VCO Q1025 (2SK520-K41).
Decoder
Incoming the receiving DSC code on the CH70 from the
antenna connector are passed through a SUB-RX RF am-
plifier Q1013 (3SK294) to the bandpass filter consisting
of coils L1014, L1015, & L1016 and capacitors C1066,
C1068, C1099, C1100, C1101, C1102, C1103, & C1104, then
the filtered signal deliver to SUB-RX 1st mixer Q1023
(3SK131).
Buffered output from the TX & SUB VCO Q1025 (2SK520)
is amplified by Q1024 and Q1020 (both 2SC5006) and
bandpass filtered by coils L1021 & L1022 and capacitors
C1106, C1107, C1121, C1122, & C1123, to provide a pure
1st local signal (134.225 MHz) for delivery to the SUB-RX
1st mixer Q1023 (3SK131).
The 22.3 MHz 1st mixer product then passes through
monolithic crystal filters XF1001 and XF1002 (±6.5 kHz
BW) and buffer amplifier Q1028 (2SC4400-3), then deli-
vere to the SUB-RX FM IF subsystem IC Q1045
(TA31136FN). This IC contains the 2nd mixer, 2nd local
oscillator, limiter amplifier, FM detector, noise amplifier,
and squelch gates.
The 2nd local is produced by crystal X1002 (21.850 MHz)
then deliver to the 2nd mixer in the SUB-RX FM IF sub-
system IC Q1045 (TA31136FN). The 1st IF is converted to
450 kHz by the 2nd mixer and stripped of unwanted com-
ponents by ceramic filter CF1002.
Filtered signal from the ceramic filter CF1002 is applied
to the limiter amplifier in the SUB-RX FM IF subsystem
IC Q1045 (TA31136FN), and then demodulate by the FM
detector in the SUB-RX FM IF subsystem IC Q1045
(TA31136FN). Demodulated signal from the SUB-RX FM
IF subsystem IC Q1045 (TA31136FN) is passes through
the low-pass filter Q1044 (2SC4154E) to the DSC Decod-
er IC Q1045 (NJM2211M) which the receiving DCS code
is decoded. The decoded DCS signal delivered to the 16-
bit MPU IC Q2004 (M30624FGAGP).
The SUB-RX 1st Local signal maintains stability from the
PLL synthesizer by using a 29.950 MHz reference signal
from crystal X1001. PLL synthesizer IC Q1035
(TB31202FNG) consists of a prescaler, reference counter,
swallow counter, programmable counter, a serial data in-
put port to set these counters based on the external data, a
phase comparator, and a charge pump.
The PLL synthesizer IC divides the 29.950 MHz reference
signal by 2396 using the reference counter (12.5 kHz com-
parison frequency). The reference oscillator feeds to the
PLL synthesizer IC Q1035 (TB31202FNG). for the 2nd lo-
cal signal.
The VCO output is divided by the prescaler, swallow
counter and programmable counter. These two signals are
compared by the phase comparator, and applied to the
charge pump.
A voltage proportional to their phase difference is deliv-
ered to the low-pass filter circuit, then fed back to the VCO
as a voltage with phase error, controlling and stabilizing
the oscillating frequency.
The TX & SUB VCO is consisted of Q1025 (2SK520-K4)
and varactor diode D1010, D1011, D1012, and D1013 (all
1SV286B), which oscillates at 134.225 MHz. The TX & SUB

9
VCO output passes through buffer amplifier Q1024
(2SC5006) to obtain stable output.
1050 Hz Weather Alert Decoder
1050 Hz Weather Alert signal from the FM IF subsystem
IC Q1039 (TA31136FN) is demodulated by Q1049
(2SC4154E) then is applied to 16-bit MPU IC Q2003
(M30624FGPGP) on the CNTL Unit.
Circuit Description
MPU
Operation is controlled by 16-bit MPU IC Q2003
(M30624FGPGP). The system clock uses a 14.74560 MHz
crystal for a time base. IC Q2002 (PST597CN) resets the
MPU when the power is on, and monitors the voltage of
the regulated 5V power supply line.
EEPROM
The EE-PROM Q2004 (AT24C128N) retains TX and RX
data for all memory channels, prescaler dividing, IF fre-
quency, local oscillator injection side, and reference oscil-
lator data.

10
Circuit Description
Note

11
Alignment
The GX1500S has been carefully aligned at the factory
for the specified performance across the marine band.
Realignment should therefore not be necessary except in
the event of a component failure. All component replace-
ment and service should be performed only by an autho-
rized Standard Horizon representative, or the warranty
policy may be voided.
The following procedures cover the sometimes critical and
tedious adjustments that are not normally required once
the transceiver has left the factory. However, if damage
occurs and some parts are replaced, realignment may be
required. If a sudden problem occurs during normal op-
eration, it is likely due to component failure; realignment
should not be done until after the faulty component has
been replaced.
We recommend that servicing be performed only by au-
thorized Standard Horizon service technicians who are
experienced with the circuitry and fully equipped for re-
pair and alignment. Therefore, if a fault is suspected, con-
tact the dealer from whom the transceiver was purchased
for instructions regarding repair. Authorized Standard
Horizon service technicians realign all circuits and make
complete performance checks to ensure compliance with
factory specifications after replacing any faulty compo-
nents.
Those who do undertake any of the following alignments
are cautioned to proceed at their own risk. Problems
caused by unauthorized attempts at realignment are not
covered by the warranty policy. Also, Standard Horizon,
a division of Vertex Standard must reserve the right to
change circuits and alignment procedures in the interest
of improved performance, without notifying owners.
Under no circumstances should any alignment be attempt-
ed unless the normal function and operation of the trans-
ceiver are clearly understood, the cause of the malfunc-
tion has been clearly pinpointed and any faulty compo-
nents replaced, and the need for realignment determined
to be absolutely necessary.
The following test equipment (and thorough familiarity
with its correct use) is necessary for complete realignment.
Correction of problems caused by misalignment result-
ing from use of improper test equipment is not covered
under the warranty policy. While most steps do not re-
quire all of the equipment listed, the interactions of some
adjustments may require that more complex adjustments
be performed afterwards. Do not attempt to perform only
a single step unless it is clearly isolated electrically from
all other steps. Have all test equipment ready before be-
ginning, and follow all of the steps in a section in the or-
der presented.
Required Test Equipment
RF Signal Generator with calibrated output level at
200 MHz
Deviation Meter (linear detector)
AF Millivoltmeter
SINAD Meter
Inline Wattmeter with 5% accuracy at 200 MHz
Regulated DC Power Supply: 13.8 VDC, 10A
50-ohm Non-reactive Dummy Load: 30W at 200 MHz
Frequency Counter: >0.1 ppm accuracy at 200 MHz
AF Signal Generator
DC Voltmeter: high impedance
VHF Sampling Coupler
AF Dummy Load: 4 Ohms, 10 W
Oscilloscope
Spectrum Analyzer
CP160 GPS/Chart Plotter
GX2360S Marine Transceiver
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be connected
to the main antenna jack in all procedures that call for
transmission. Correct alignment is not possible with an
antenna.
After completing one step, read the following step to de-
termine whether the same test equipment will be required.
If not, remove the test equipment (except dummy load
and wattmeter, if connected) before proceeding.
Correct alignment requires that the ambient temperature
be the same as that of the transceiver and test equipment,
and that this temperature be held constant between 68 °F
and 86 °F (20 °C and 30 °C). When the transceiver is
brought into the shop from hot or cold air it should be
allowed some time for thermal equalization with the en-
vironment before alignment. If possible, alignments
should be made with oscillator shields and circuit boards
firmly affixed in place. Also, the test equipment must be
thoroughly warmed up before beginning.
Note: Signal levels in dB referred to in this procedure are
based on 0 dBµ = 0.5 µV (closed circuit).

12
Alignment
Reference Frequency Adjustment
Setup the test equipment as shown below.
Set the channel to CH16.
Adjust TC1002 so that the DC voltmeter reading is
1.5 V ± 0.1 V.
Set the channel to CH16.
With the PTT switch pressed, adjust TC1001 so that
the DC voltmeter reading is 3.0 V ± 0.1 V.
Release the PTT switch.
Transmit Power Adjustment
Setup the test equipment as shown below.
Set the channel to CH16.
Use the [H/L(NAV)] key to set the transceiver to “LOW”
power.
With the PTT switch pressed, adjust TC1003 so that
the Frequency Counter reading is 156.800 MHz ± 100
Hz.
Release the PTT switch.
Receiver VCV Adjustment
Setup the test equipment as shown below.
Sub Receiver/Transmitter VCV Adjustment
Setup the test equipment as shown below.
GX1500S
Frequency
Counter
50-ohm
Dummy Load
Sampling
Coupler
ANT
DC Voltmeter
TP1010
GX1500S
GX1500S
50-ohm
Dummy Load
ANT
DC Voltmeter
TP1007
Set the channel to CH16.
Use the [H/L(NAV)] key to set the transceiver to “HI”
power.
With the PTT switch pressed, adjust VR1001 so that
RF output power is 24 W ± 0.3 W.
Release the PTT switch, then set the transceiver to
“LOW” power by the [H/L(NAV)] key.
With the PTT switch pressed, adjust VR1002 so that
RF output power is 0.8 W ±0.1 W.
Release the PTT switch.
50-ohm
Dummy Load
ANT
Inline
Wattmeter
GX1500S
MAIN UNIT ALIGNMENT POINT
L1013 / L1010
L1027 / L1014
L1028 / L1015
L1031 / L1016
TP1006
TC1002
VR1001
VR1003
VR1002
VR1004
TC1001
TP1011
JP1001

13
Alignment
Sub Receiver Front-end Adjustment
Setup the test equipment as shown below.
Set the RF Signal Generator output to 156.525 MHz,
at a level of +10dBµ, ±3.0 kHz deviation with a 1 kHz
audio tone.
Adjust L1016, L1015, and L1014 in order for maxi-
mum indication on the DC voltmeter.
TX Deviation Adjustment
Setup the test equipment as shown below.
Set the AF Signal Generator output to 100 mVrms at 1
kHz.
Set the channel to CH16.
With the PTT switch pressed, adjust VR1003 so that
the maximum deviation is 4.4 kHz ± 0.1 kHz.
Release the PTT switch, then set the AF Signal Gen-
erator output to 1 Vrms at 100 Hz.
With the PTT switch pressed, adjust VR1004 so that
the maximum deviation is 4.4 kHz ± 0.1 kHz.
Release the PTT switch
AF Signal
Generator
Deviation
Meter
50-ohm
Dummy Load
Sampling
Coupler
ANT J1001
Pin 2
GX1500S
Receiver Front-end Adjustment
Setup the test equipment as shown below.
Spectrum
Analizer
Tracking
Generator
ANT TP1006
GX1500S
GX1500S-FRONT-END
A
TTEN 10dB
RL 10.0dBm 10dB/
CENTER 159.00 MHz
RBW 300 kHz VBW 300 kHz
SPAN 20.00 MHz
SWP 200 ms
DC Voltmeter
RF Signal
Generator
ANT TP1011
GX1500S
PIN 2 of J1001
Set the spectrum analyzer as shown below:
CENTER: 159.000 MHz
SPAN: 20.000 MHz
RBW, VBW: 30 kHz
SWP: 200 ms
Set the channel to CH01A.
Adjust L1010, L1013, L1027, L1028, and L1031 until
the wave form shown in below is obtained.
BOTTOM VIEW

14
Alignment
Software Alignment/Confirmation Mode
The “Software Alignment/Confirmation Mode” has been
build in the microprocessor in order to adjust and con-
firm the performance of transceiver.
The purpose is to adjust transceiver simply and to con-
firm the performance of transceiver smoothly.
STARTING SOFTWARE ALIGNMENT MODE
Confirm that the transceiver’s power is turned off.
Short the TEST points (JP1001).
Press and hold the VOL/PWR knob until the radio
turns on while press and holding the [CALL(MENU)]
and [DISTRESS]keys. The LCD
will be as shown in the illustration
at the right.
Squelch Adjustment
Setup the test equipment as shown below.
STARTING SOFTWARE CONFIRMATION MODE
Confirm that the transceiver’s power is turned off.
Short the TEST points (JP1001).
Press and hold the PWR key until the radio turns on
while press and holding the [DW(IC)] and [DIS-
TRESS]keys. Release the keys, the
LCD will be as shown for one sec-
ond in the illustration at the right.
DSC Encoder Confirmation
Setup the test equipment as shown below.
Press the [SCAN(MEM)] key to re-
call the Alignment Item “04:
THRESHOLD.”
Set the RF Signal Generator output to 156.800 MHz,
at a level of –10dBµV, ±3.0 kHz deviation with a 1 kHz
audio tone.
Press the [DW(IC)] key.
Press the [ENT]key to save the new setting.
Press the [SCAN(MEM)] key to re-
call the Alignment Item “05: TIGHT.”
Set the RF Signal Generator output
to 156.800 MHz, at a level of +4dBµ ±3.0 kHz devia-
tion with a 1 kHz audio tone.
Press the [DW(IC)] key.
Press the [ENT]key to save the new setting.
Press the [SCAN(MEM)] key to re-
call the Alignment Item “07: DC
VOLT.”
Press the [DW(IC)] key.
Press the [ENT]key to save the new setting.
This completes the Software Alignment Mode. To save
all settings and exit, press and hold the [DISTRESS]key
for 2 seconds.
Set the channel to CH70.
Press the PTT switch, confirm that the first tone de-
viation is 4.0 kHz ±0.3 kHz.
Note: In CH70 while Software Confirmation Mode,
ever time you are in transmit mode, (every time you
press PTT), the following test tone can be outputted:
1st transmission: Synthetic tone of 1300 Hz and 2100 Hz
2nd transmission: 1300 Hz
3rd transmission: 2100 Hz
4th transmission: No Modulation
5th transmission: Return to 1st transmission
This completes the Software Alignment/Confirmation
Mode. Turn the transceiver’s power off, then disconnect
the Jumper from the TEST points (JP1001).
RF Signal
Generator
ANT
GX1500S
Deviation
Meter
50-ohm
Dummy Load
Sampling
Coupler
ANT
GX1500S

15
MAIN Unit
Circuit Diagram
TX HI: 4.13 V
TX LO: 0.55 V
TX: 1.70 V
TX HI: 4.50 V
TX LO: 2.33 V
TX: 6.51 V
TX: 2.00 V
TX: 1.26 V
RX: 4.90 V
TX: 0 V
RX: 2.75 V
RX: 5.70 V
RX: 7.00 V
RX: 0.73 V
RX: 2.75 V
RX: 5.75 V RX: 7.00 V
RX: 0.70 V
RX: 7.70 V
RX: 0.22 V
RX: 0 V
TX: 4.35 V
RX: 4.35 V
TX: 0 V
3.58 V
3.34 V
3.88 V
7.00 V 0.99 V
0.74 V
5.55 V
3.45 V
RX: 1.82 V RX: 7.40 V
RX: 1.06 V
RX: 7.00 V
RX: 0.74 V
RX: 5.59 V
RX: 2.30 V
RX: 6.86 V
RX: 7.50 V
RX: 0.25 V
RX: 1.00 V
RX: 7.70 V
RX: 5.40 V
RX: 0.30 V
RX: 5.30 V
RX: 0.50 V
RX: 5.60 V
RX: 5.50 V
RX: 3.00 V
RX: 2.43 V
RX: 5.30 V
4.30 V
4.60 V
1.76 V
1.57 V
4.60 V
5.00 V
TX HI: 0 V
TX LO: 4.88 V
RX: 7.80 V
TX: 0 V
RX: 0 V
TX: 8.00 V
RX: 5.00 V
TX: 0 V
RX: 0 V
TX: 5.00 V
8.00 V
8.00 V
8.00 V
4.90 V
13.10 V
13.75 V
5.00 V
13.80 V
13.80 V
13.10 V 4.90 V
5.00 V
5.00 V
5.00 V
1.80 V
2.50 V
5.00 V
VCO LOCK: 0.92 V
VCO UNLOCK: 5.00 V
AUDIO MUTE ON: 4.90 V
AUDIO MUTE OFF: 0 V
RX: 5.30 V
RX: 2.33 V RX: 2.930 V
RX: 3.50 V
RX: 2.30 V
RX: 0.70 V
RX: 1.56 V
RX: 1.30 V
RX: 2.15 V
13.80 V

16
MAIN Unit
Note

17
MAIN Unit
Parts Layout (Side A)
BADCFEHG I
1
3
5
2
4
6
2SC4154 (LE)
(Q1038, 1040, 1042)
2SC5006 (24)
(Q1014, 1024, 1032)
2SK508 (K52)
(Q1025)
2SK520 (K41)
(Q1035)
CD4053BPWR
(Q1026)
TA31136FN
(Q1039, 1043)
TB31202FNG
(Q1033)
CD4066BPWR
(Q1036)
LM2902PWR
(Q1051, 1052)
DTA144EE (16)
(Q1001, 1034)
LA4425A
(Q1048)
LM2904PWR
(Q1002)
RT1N441U (N3)
(Q1006, 1007, 1015,
1016, 1029)
MC2850 (A7)
(D1021, 1022)
S-AV37
(Q1005)

18
MAIN Unit
Parts Layout (Side B)
badcfeh
gi
1
3
5
2
4
6
3SK131 (V12)
(Q1023, 1031)
2SB1301 (ZQ)
(Q1011, 1018)
2SC4154 (LE)
(Q1021, 1030, 1044,
1046, 1049, 1050)
2SC4400 (RT4)
(Q1028, 1037)
2SC5006 (24)
(Q1020)
NJM2211M
(Q1041, 1045)
1SS321 (F9)
(Q1001)
DAN235U (M)
(Q1007)
RT1N441U (N3)
(Q1004, 1009, 1010,
1012, 1027, 1047)
3SK294 (UV)
(Q1013, 1022)
DTB123EK (F12)
(Q1003, 1008)
NJM7808DL1A
(Q1019)
NJM78M05DL1A
(Q1017)

19
Parts List
REF DESCRIPTION VALUE V/W TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR
MAIN Unit
PCB with Components CB3333001 USA
CB3333002 EUROPE
Printed Circuit Board AM017N000 FR0139100 1-
C 1002 CERAMIC CAP. 15pF 50V CH CHU5 150J6 K02179104 1- A B1
C 1003 CHIP CAP. 4pF 50V CH GRM1882C1H4R0CZ01D K22174205 1- B h2
C 1004 CERAMIC CAP. 27pF 50V CH CHU5 270J6 K02179107 1- A B1
C 1005 CHIP CAP. 1pF 50V CK GRM1884C1H1R0CZ01D K22174202 1- B h2
C 1006 CHIP CAP. 1pF 50V CK GRM1884C1H1R0CZ01D K22174202 1- B g1
C 1007 CERAMIC CAP. 18pF 50V CH CHU5 180J6 K02179105 1- A C1
C 1008 CERAMIC CAP. 47pF 50V CH CHU5 470J6 K02179110 1- A C1
C 1009 CHIP CAP. 3pF 50V CJ GRM1883C1H3R0CZ01D K22174204 1- B g2
C 1010 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- B g2
C 1011 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- B e2
C 1012 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g2
C 1013 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B e2
C 1015 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B f2
C 1016 CERAMIC CAP. 22pF 50V CH CHU5 220J6 K02179106 1- A D1
C 1019 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B d2
C 1020 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B d2
C 1021 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B c1
C 1023 AL.ELECTRO.CAP. 2200uF 25V RE3-25V222MI6# K40149055 1- A H2
C 1024 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B b2
C 1031 CHIP CAP. 15pF 50V CH GRM1882C1H150JA01D K22174215 1- B f2
C 1032 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B h2
C 1033 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B h2
C 1034 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A B2
C 1035 CERAMIC CAP. 22pF 50V CH CHU5 220J6 K02179106 1- A C1
C 1036 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B e1
C 1037 AL.ELECTRO.CAP. 10uF 25V RC2-25V100MB K40149012 1- A E1
C 1038 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A E1
C 1040 CHIP CAP. 3pF 50V CJ GRM1883C1H3R0CZ01D K22174204 1- A F1
C 1042 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A F1
C 1043 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A E1
C 1045 CHIP TA.CAP. 4.7uF 10V TEMSVA1A475M-8R K78100022 1- A F1
C 1046 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A G1
C 1048 CHIP CAP. 0.22uF 10V B GRM188B11A224KA01D K22104801 1- A E2
C 1051 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B d2
C 1052 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B d2
C 1053 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B c2
C 1054 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B b2
C 1055 CHIP CAP. 0.1uF 25V F GRM39F104Z25PT K22145001 1- A G2
C 1056 CHIP CAP. 0.1uF 25V F GRM39F104Z25PT K22145001 1- B b2
C 1059 CHIP CAP. 47pF 50V CH GRM1882C1H470JA01D K22174227 1- A B2
C 1060 CHIP CAP. 10pF 50V CH GRM1882C1H100JA01D K22174211 1- A B2
C 1062 CHIP CAP. 0.75pF 50V CK GRM1884C1HR75CZ01D K22174260 1- B h2
C 1063 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B h2
C 1065 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B h2
C 1066 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B h2
C 1068 CHIP CAP. 2pF 50V CK GRM1884C1H2R0CZ01D K22174203 1- B h3
C 1069 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A F1
C 1070 CHIP CAP. 6pF 50V CH GRM1882C1H6R0DZ01D K22174207 1- A F1
C 1071 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A B2
C 1073 CHIP CAP. 0.22uF 10V B GRM188B11A224KA01D K22104801 1- A E1
C 1074 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A E1
C 1075 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A E1
C 1076 CHIP TA.CAP. 10uF 10V TEMSVA1A106M-8R K78100028 1- A E1
C 1077 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A E1
C 1078 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A E2
C 1080 AL.ELECTRO.CAP. 100uF 10V RE2-10V101MMA K40109024 1- A I4
C 1081 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B a3
C 1082 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B a4
C 1083 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B a4
C 1084 CHIP TA.CAP. 10uF 10V TEMSVA1A106M-8R K78100028 1- B a4
C 1085 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B a2
C 1086 CHIP CAP. 0.1uF 25V F GRM39F104Z25PT K22145001 1- B a2
C 1087 CHIP CAP. 0.1uF 25V F GRM39F104Z25PT K22145001 1- B a2
C 1088 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B a2
C 1089 CHIP CAP. 0.1uF 25V F GRM39F104Z25PT K22145001 1- B a2
C 1090 CHIP CAP. 100pF 50V CH GRM1882C1H101JA01D K22174235 1- B a2
C 1091 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B a3
C 1092 AL.ELECTRO.CAP. 100uF 25V RE2-25V101MMA K40149028 1- A I2
C 1093 AL.ELECTRO.CAP. 100uF 10V RE2-10V101MMA K40109024 1- A I3
C 1094 CHIP CAP. 4pF 50V CH GRM1882C1H4R0CZ01D K22174205 1- B h2

20
MAIN Unit
Parts List
REF DESCRIPTION VALUE V/W TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR
C 1095 CHIP CAP. 10pF 50V CH GRM1882C1H100JA01D K22174211 1- B i2
C 1097 CHIP CAP. 10pF 50V CH GRM1882C1H100JA01D K22174211 1- B i2
C 1098 CHIP CAP. 10pF 50V CH GRM1882C1H100JA01D K22174211 1- B i2
C 1099 CHIP CAP. 6pF 50V CH GRM1882C1H6R0DZ01D K22174207 1- B h3
C 1100 CHIP CAP. 0.5pF 50V CK GRM1884C1HR50CZ01D K22174201 1- B h3
C 1101 CHIP CAP. 6pF 50V CH GRM1882C1H6R0DZ01D K22174207 1- B h3
C 1102 CHIP CAP. 0.5pF 50V CK GRM1884C1HR50CZ01D K22174201 1- B h4
C 1103 CHIP CAP. 3pF 50V CJ GRM1883C1H3R0CZ01D K22174204 1- B h4
C 1104 CHIP CAP. 4pF 50V CH GRM1882C1H4R0CZ01D K22174205 1- B h4
C 1105 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B d2
C 1106 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g3
C 1107 CHIP CAP. 12pF 50V CH GRM1882C1H120JA01D K22174213 1- B h3
C 1108 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g3
C 1109 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A E2
C 1110 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- A E2
C 1111 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g2
C 1113 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B a3
C 1114 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B a3
C 1115 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B i2
C 1116 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B i2
C 1117 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A B4
C 1119 CHIP CAP. 22pF 50V CH GRM1882C1H220JA01D K22174219 1- B h4
C 1120 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g4
C 1121 CHIP CAP. 39pF 50V CH GRM1882C1H390JA01D K22174225 1- B h3
C 1122 CHIP CAP. 12pF 50V CH GRM1882C1H120JA01D K22174213 1- B h4
C 1123 CHIP CAP. 22pF 50V CH GRM1882C1H220JA01D K22174219 1- B g4
C 1124 CHIP CAP. 4pF 50V CH GRM1882C1H4R0CZ01D K22174205 1- B g6
C 1125 CHIP CAP. 10pF 50V CH GRM1882C1H100JA01D K22174211 1- B h2
C 1126 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g2
C 1128 CHIP CAP. 1pF 50V CK GRM1884C1H1R0CZ01D K22174202 1- B g2
C 1129 CHIP TA.CAP. 10uF 10V TEMSVA1A106M-8R K78100028 1- B g2
C 1130 CHIP TA.CAP. 10uF 10V TEMSVA1A106M-8R K78100028 1- B g3
C 1131 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g3
C 1132 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A F3
C 1133 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A F4
C 1134 CHIP TA.CAP. 10uF 10V TEMSVA1A106M-8R K78100028 1- B c3
C 1135 CHIP CAP. 0.0056uF 50V B GRM188B11H562KA01D K22174818 1- A F3
C 1136 CHIP CAP. 1uF 10V F GRM188F11A105ZA01D K22105001 1- A G3
C 1137 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A G3
C 1138 CHIP CAP. 1uF 10V F GRM188F11A105ZA01D K22105001 1- A G3
C 1139 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- B b3
C 1140 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B b3
C 1141 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A A2
C 1142 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B i2
C 1144 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B i2
C 1145 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A A2
C 1147 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g4
C 1148 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B g4
C 1149 CHIP CAP. 33pF 50V CH GRM1882C1H330JA01D K22174223 1- B g4
C 1150 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B g4
C 1151 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A B2
C 1152 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A B2
C 1153 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A B2
C 1154 CHIP CAP. 1pF 50V CK GRM1884C1H1R0CZ01D K22174202 1- A C2
C 1155 CHIP CAP. 15pF 50V CH GRM1882C1H150JA01D K22174215 1- A F4
C 1156 CHIP CAP. 1uF 10V F GRM188F11A105ZA01D K22105001 1- A F3
C 1157 CHIP CAP. 0.0068uF 50V B GRM188B11H682KA01D K22174834 1- A F3
C 1158 CHIP CAP. 15pF 50V CH GRM1882C1H150JA01D K22174215 1- A F3
C 1159 CHIP CAP. 1uF 10V F GRM188F11A105ZA01D K22105001 1- A F3
C 1160 CHIP CAP. 1uF 10V F GRM188F11A105ZA01D K22105001 1- A G3
C 1161 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B d3
C 1162 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- B c3
C 1163 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- A G3
C 1165 CHIP CAP. 4pF 50V CH GRM1882C1H4R0CZ01D K22174205 1- B i2
C 1166 CHIP CAP. 4pF 50V CH GRM1882C1H4R0CZ01D K22174205 1- B i3
C 1167 CHIP CAP. 0.5pF 50V CK GRM1884C1HR50CZ01D K22174201 1- B i3
C 1168 CHIP CAP. 5pF 50V CH GRM1882C1H5R0CZ01D K22174206 1- B i3
C 1169 CHIP CAP. 0.5pF 50V CK GRM1884C1HR50CZ01D K22174201 1- B i4
C 1170 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B g4
C 1172 CHIP CAP. 10pF 50V CH GRM1882C1H100JA01D K22174211 1- B g4
C 1173 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- A B4
C 1174 CHIP CAP. 22pF 50V CH GRM1882C1H220JA01D K22174219 1- A C3
C 1175 CHIP CAP. 22pF 50V CH GRM1882C1H220JA01D K22174219 1- A C2