Vertex Standard VX-3200V User Manual

VHF FM Transceiver

VX-3200V

Service Manual

2002 VERTEX STANDARD CO., LTD. (EC039N90A)

©

VERTEX STANDARD CO., LTD.

4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan

VERTEX STANDARD

US Headquarters

10900 Walker Street, Cypress, CA 90630, U.S.A.

International Division

8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A.

YAESU EUROPE B.V.

P.O. Box 75525, 1118 ZN Schiphol, The Netherlands

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.

VERTEX STANDARD HK LTD.

Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong

Introduction

This manual provides technical information necessary for servicing the VX-3200V Transceiver.
Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified

persons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal in
some countries.

Two PCB layout diagrams are provided for each double-sided circuit board in the transceiver. Each side of thr board is
referred to by the type of the majority of components installed on that side (“leaded” or “chip-only”). In most cases one
side has only chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils,
electrolytic capacitors, ICs, etc.), or leaded components only.

While we believe the technical information in this manual to be correct, Vertex Standard assumes no liability for damage
that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing out any
inconsistencies in the technical information would be appreciated.

Contents

Specifications................................................... 2

DSUB 9-pin Accessory Connector................. 3

Exploded View & Miscellaneous Parts ........ 4

Block Diagram ................................................. 5

Interconnection Diagram ............................... 7

Circuit Description ...................................... 9

Alignment ................................................... 11

Board Unit (Schematics, Layouts & Parts)

RF Unit ............................................................................. 17

Panel Unit ........................................................................ 31

1

Specifications

General

Frequency range: 134-160 MHz (Version A)

148-174 MHz (Version C)

Number of Groups: 10
Number of Channels : 128 channels
PLL Steps: 2.5 kHz / 5.0 kHz / 6.25kHz
Power Supply Voltage: 13.6V DC ±15 %
Channel Spacing: 12.5 / 15.0 / 25.0 / 30.0 kHz
Current Consumption (Approx.): TX: 10 A

RX: 700 mA
STBY: 250 mA

Operating Temperature range: –22 °F to 140 °F (–30 °C to +60 °C)
Frequency Stability: Better than ±2.5 ppm
RF Input-Output Impedance: 50 ohms
Audio Output Impedance: 4 ohms
Dimensions: 6.3 x 1.6 x 6.7 inch (160 x 40 x 170 mm)
Weight (Approx.): 1.87 lb (0.85 kg)

Receiver (Typical Values)

Circuit type: Double conversion Super-heterodyne
Sensitivity: 0.25 µV (12 dB SINAD)
Adjacent Channel Selectivity: 80 / 70 dB
Intermodulation: 80 dB
Spurious and Image Rejection: 90 dB
Audio Output: 4 W @ 4 ohms 5% THD
Audio Distortion: <3 % @1 kHz

Transmitter (Typical Values)

Power Output: 50 W (low: 10W)
Modulation: 16K0F3E, 11K0F3E
Max Deviation: 5.0/2.5 kHz
Conducted Spurious Emission: 70 dB below carrier
Audio Distortion: <3 % @ 1 kHz
Microphone type: Dynamic
Microphone impedance: 600 ohms

2

DSUB 9-pin Accessory Connector

Pin 1: Output Logic squelch (Will be effective this output during Data transmission – Inputting logic Low

level signal to the Pin #4 as the DTR signal)

High: Radio receiving the signal with the correct CTCSS or DCS.
Low: Radio not receiving the signal with the correct CTCSS or DCS.

Pin 2: Output Rx discriminator (Need to set the solder short on the PCB)

JP3 (JP1503) - Flat: 10 Hz to 3.0 kHz (140 mVrms / STD deviation with 600 ohm termination)

or

JP4 (JP1504) - Filtered 300 Hz to 3.0 kHz (70 mVrms / STD deviation with 600 ohm termination)
Notes: JP3: Closed from the factory.

JP4: Not Closed from the factory.

Pin 3: Input TX data to the radio modulator. (Flat: 10 Hz to 3.0 kHz)

(40 mVrms / STD deviation)

Pin 4: Input DTR (to switch the radio operation between dispatch operation and Data mode)

[DTR Low: Turn on the Data transmission, less than 0.5 V]
[DTR High: Turn off the Data transmission, more than 4.0 V]

Pin 5: Ground

Pin 6: Output Horn alert signal (Open collector with maximum 16.0 V, 100 mA sink).

Pin 7: Input external PTT (effective when in the Data mode)

[Low: Request the transmission]
[High: Request the Receiving]

Pin 8: Output supply voltage (Need to set the solder short on the PCB)

JP1 (JP1501) Output 5.0 V (Maximum 100 mA output)

or
JP2(JP1502) Output 13.6 V (Maximum 100 mA output)
* Both JP1 and JP2 are not closed from the factory.

Pin 9: Input the ignition signal of the CAR.

This signal is for the following operation,

(1) Disable the Horn alert during the ignition is turned on.
(2) Turn on and off the radio. This function requires the solder short JP8 (JP1508).

3

Exploded View & Miscellaneous Parts

REF.

VXSTD P/N

U20308002

•

U24306002

‚

U24308002

ƒ

U31206007

„

WIRE ASSY

T9206634A

DESCRIPTION

BINDING HEAD SCREW M3 x 8 NI
TAPTITE SCREW M3 x 6 NI
TAPTITE SCREW M3 x 8 NI
OVAL HEAD SCREW M2.6 x 6 B

CONNECTOR

P1090654

QTY.

2

10

2
7

„

BLIND SEET (130 x 10)

RA0424000

LEAF SPRING

RA0014700

‚

‚

„

‚

‚

‚

•

‚

„

„

CASE
RA0015100

„

WIRE ASSY
T9206675

•

GASKET
RA0464300

‚

SHIELD PLATE PA
R0124501

RA0438500

VOLUME KNOB
RA0377000

4

4

BLIND SEET (4 x 3)

TUBE

„

PANEL ASSY

RA0376000

WIRE ASSY

T9206979

RA0405200

„

RF UNIT

‚

BLIND SEET (4 x 25)
RA0425500

WIRE ASSY
T9206633

PANEL UNIT

BLIND SEET (4 x 3)
RA0405200

BLIND SEET (34 x 8)
RA0404900

SPEAKER
M4090154

‚

‚

IC (POWER MODULE)
G1093737

CHASSIS
RA0152700

BLIND SEET (35 x 4)
RA0405000

SPONGE RUBBER
RA0383600

SPONGE RUBBER
RA0459900

GAP PAD
S6000379

HOLDER
RA0014400

ƒ

ƒ

CONNECTOR
P1090984

SP HOLDER
RA0378300

Block Diagram (1)

5

Block Diagram (2)

6

Interconnection Diagram

7

Note

8

Circuit Description

1. Overview

The VX-3200V is a VHF/FM mobile transceiver designed
to operate in the frequency range of 148 to 174MHz(C
Band), or 134 to 160MHz(A Band).

2. Circuit Configuration by Frequency

The receiver is a double-conversion superheterodyne with
a first intermediate frequency (IF) of 44.25MHz and a sec­ond IF of 450kHz. Incoming signals from the antenna are
mixed with the local signal from PLL to produce the first
IF of 44.25MHz.

This is then mixed with the 44.25MHz second local oscil­lator (using the 14.6MHz TCXO) output to produce the
450kHz second IF. This is detected to give the demodu­lated signal.

The transmit signal frequency is generated by PLL VCO,
and modulated by the signal from the microphone. It is
then amplified and sent to the antenna.

3. Receive Signal Path

Incoming RF signals from the antenna connector are de­livered to the RF Unit. RF signals pass through a low-pass
filter (LPF) antenna switching network consisting of coils
L1001, L1003, and L1005, capacitors C1004, C1008, C1009,
C1135, and C1011, and antenna switching diodes D1005,
D1007, and D1031, for delivery to the receiver front end.

Signals within the frequency range of the transceiver are
then passed through a varactor-tuned bandpass filter con­sisting of L1009, and L1014 before RF amplification by
Q1011 (2SC3356).

The amplified RF is then band-pass filtered again by var­actor-tuned resonators L1022, and L1027 to ensure pure
in-band input to 1st mixer Q1038 (SPM5001).

Buffered output from the VCO Unit is amplified by Q1021
(2SC5107) and low-pass filtered by L1030 / L1031 and
C1178 / C1072 / C1180 / C1129 / C1182, to provide a pure
1st local signal between 192.25 and 218.25MHz(C Band),

178.25 and 204.25MHz(A Band) to the 1st mixer.
The 44.25MHz 1st mixer product then passes through dual

monolithic crystal filters XF1001, and is amplified by
Q1029 (2SC4215Y) and delivered to the input of the FM
IF subsystem IC Q1028 (TA31136FN).

This IC contains the 2nd mixer, 2nd local oscillator, limit­er amplifier, FM detector, noise amplifier, and squelch
gates.

The 2nd LO in the IF-IC is produced from crystal X1001
(14.600MHz) and the 1st IF is converted to 450kHz by the
2nd mixer and stripped of unwanted components by ce­ramic filter CF1001 or CF1002. After passing through a
limiter amplifier, the signal is demodulated by the FM
detector CD1001 (CDBC450CX24).

Detected audio from Q1029 is applied to Q2016 (AK2345 )
and audio low-pass filter. After volume adjustment by
Q2014 (M62364FP), the audio signal is amplified by the
AF power amplifier Q1509 (TDA2003H) and passed to
speaker jack.

4. Transmit Signal Path

Voice audio from the microphone is delivered via the Mic
(Jack) Unit to the PANEL Unit, after passing through
amplifier Q2022 (NJM2902V), Mic gain-volume Q2014
(M62364FP) pre-emphasis Q2015 (NJM2902V), and lim­iter (IDC instantaneous deviation control), is adjusted for
optimum deviation level and delivered to the next stage.

Voice input from the microphone CTCSS, and DCS audio
are modulated by the VCO, and the reference frequency
oscillator of the synthesizer.

Synthesizer output, after passing through diode switch
D1022 (1SS321), is amplified by driver Q1025
(2SC5415E) / Q1026 (2SC5107-O) and power module
Q1039 (RA60H1317M) to obtain full RF output. The RF
energy then passes through antenna switch D1005 / D1007
/ D1031 and a low-pass filter circuit and finally to the an­tenna connector.

RF output power from the final amplifier is sampled by
CM coupler and is rectified by D1011, D1012 (HSM88AS
x 2). The resulting DC is fed through Automatic Power
Controller Q1003 (NJM2902V), to transmitter RF ampli­fier and thus the power output.

Generation of spurious products by the transmitter is min­imized 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 L1001, L1003,
L1004, L1013, C1004, C1008, C1009, C1135, C1011, C1014,
C1209, and C1205, resulting in more than 60dB of har­monic suppression prior to delivery to the RF energy to
the antenna.

5. PLL Frequency Synthesizer

PLL frequency synthesizer consists of the VCO Q1013
(2SK508-K52:RX) and Q1015 (2SC5107-O:TX), VCO buff­ers Q1018 (2SC5107-O), Q1020 (2SC5107-O), Q1021
(2SC5107-O), PLL subsystem IC Q1023 (MB15A02PFV1)
and 14.6 MHz reference TCXO X1001.

The frequency stability is +/- 2.5 ppm within tempera­ture range of -30 to +60 degree. The output of the 14.6
MHz reference is applied to pin 1 of the PLL IC.

While receiving, VCO Q1013 oscillates between 192.25
and 218.25 MHz (C Band), 178.25 and 204.25 MHz (A
Band) according to the transceiver version and the pro­grammed receiving frequency. The VCO generates 192.25
to 218.25MHz (C Band), 178.25 to 204.25MHz (A Band)

9

Circuit Description

for providing to the first local signal. In TX, the VCO gen­erates 148 to 174MHz (C Band), 134 to 160MHz (A Band).

The output of the VCO is amplified by the Q1020 and rout­ed to the pin 8 of the PLL IC. Also the output of the VCO
is amplified by the Q1021 and routed first local /Power
Module according to D1022.

The PLL IC consists of a prescaler, fractional divider, ref­erence divider and phase comparator and charge pump.
This PLL IC is fractional-N type synthesizer and performs
in the 40 or 50 kHz reference signal, which is eighth of the
channel step (2.5, 5, or 6.25 kHz). The input signal from
pin 1 and 8 of the PLL IC is divided down to the 20 kHz
and compared at phase comparator. The pulsed output
signal of the phase comparator is applied to the charge
pump and transformed into DC signal in the loop filter.
The DC signal is applied to the pin 1 of the VCO and locked
to keep the VCO frequency constant.

PLL data is output from DCS_E (pin 100), CLOCK (pin 2)
and PLL_E (pin 98) of the microprocessor Q2013. The data
are input to PLL IC when the channel is changed or when
transmission is changed to reception and vice versa. A
PLL lock condition is always monitored by the pin 20 of
the Q2013. When the PLL is unlocked, the UL goes low.

6. Miscellaneous Circuits

6-1 DCS Demodulator

DCS signals are demodulated on the PANEL-UNIT, It is
demodulated by Q2016 (AK2345), amplifier Q2015, and
comparator Q2021.

6-2 CTCSS encoder/decoder

The CTCSS code is generation and encoding by CTCSS
encoder/decoder IC Q2016 (AK2345).

7. Power Supply Circuits

7-1 All 13.6V

13.8V is always supplied to Power AMP Q1039
(RA45H4452M). Switched 13.6V is supplied to AF Power
AMP Q1509 (TDA2003H) and 9V Regulator Q1004
(MM1216EN) and Q1005 (2SB1201STP).

7-2 All 9V
9V regulated from 13.6V by Q1004 (MM1216EN) and
Q1005 (2SB1201STP).

7-3 VCO 9V

9V is filtered by Ripple Filter and is supplied to VCO Os­cillator Q1013 (2SK508-K52), Q1015 (2SC5107-O), and
VCO BUFFER AMP Q1015 (2SC5107-O).

7-4 5V (RF-UNIT)

5V in RF-UNIT is regulated by REGULATOR IC Q1024
(NJM78L05UA). 5V is supplied to PLL IC Q1023
(MB15A02PFV), FM IC Q1028 (TA31136FN), and Refer­ence Oscillator Q1027 (23C4116GR).

7-5 TX 9V

TX 9V is active on transmit. TX 9V is supplied to ANT SW
D1005, D1007 (UM9957F) and TX DRIVER Q1022
(2SC5415E), Q1025 (2SC5107-O).

7-6 RX 9V

RX 9V is active on receive. RX 9V is supplied to RX RF
AMP Q1026 (3SK228) and MIXER Q1011 (2SC4226-R34).

7-7 5V (RF-UNIT)

9V from RF-UNIT is regulated to 5V by REGULATOR IC

Q2006 (NJM78L05UA) in PANEL-UNIT.

6-3 MPU

Operation is controlled by 8-bit MPU IC Q2013
(LC87F72C8A). The system clock uses a 3.6864MHz crys­tal for a time base. IC Q2003 (S-80735SN ) resets the MPU
when the power is on, and monitors the voltage of the
regulated 5V power supply line.

6-4 DCS Encorder

The DCS code is generation and encoding by MPU IC
Q2013 (LC87F72C8A ). It is filtered by Q2021 (NJM2902V)
and adjusted the level by Q2014 (M62364FP).

6-5 Compandor

The Compandor is active when Pin90 of Q2013
(LC87F72C8A) is "High". When the Compandor is active,
MIC Audio is compressed, and detected audio is expand­ed by Q2017 (LA8630M).

6-6 2-Tone Decoder

A 2-Tone signal is demodulated on the PANEL-UNIT. It
is demodulated by Q2116 and comparator Q2021. This
signal is provided to pin 26 of Q2013 (MPU IC-

LC87F72C8A) for its decording.

10

Alignment

Introduction

The VX-3200V is carefully aligned at the factory for the
specified performance across the frequency range speci­fied for each version. Realignment should therefore not
be necessary except in the event of a component failure,
or altering version type. All component replacement and
service should be performed only by an authorized Ver­tex Standard representative,or the warranty policy may
be void.

The following procedures cover the sometimes critical and
tedious adjustments that are not normally required once
the transceiver has left the factory. However, if damage
occurs and some parts subsequently are placed, realign­ment may be required. If a sudden problem occurs dur­ing normal operation, it is likely due to component fail­ure; realignment should not be done until after the faulty
component has been replaced.

We recommend that servicing be performed only by au­thorized Vertex Standard service technicians who are ex­perienced with the circuitry and fully equipped for repair
and alignment. Therefore, if a fault is suspected, contact
the dealer from whom the transceiver was purchased for
instructions regarding repair. Authorized Vertex Standard
service technicians realign all circuits and make complete
performance checks to ensure compliance with factory
specifications after replacing any faulty components.

Those who do undertake any of the following alignments
are cautioned to proceed at their own risk. Problems
caused by unauthorized attempts at realignment are not
covered by the warranty policy. Also, Vertex Standard
reserves the right to change circuits and alignment proce­dures in the interest of improved performance, without
notifying owners.

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

The following test equipment (and thorough familiarity
with its correct use) is necessary for complete realignment.
Correction of problems caused by misalignment result­ing from use of improper test equipment is not covered
under the warranty policy. While most steps do not re­quire all of the equipment listed, the interactions of some
adjustments may require that more complex adjustments
be performed afterwards.

Required Test Equipment

r RF Signal Generator with calibrated output level

at 500MHz

r Deviation Meter (linear detector)
r In-line Wattmeter with 5% accuracy at 500MHz
r 50W RF Dummy Load with power rating 100W

at 500MHz

r 4W AF Dummy Load
r Regulated DC Power Supply (standard 13.6V

DC, 15A)

r Frequency Counter with 0.1ppm accuracy at

500MHz

r AC Voltmeter
r DC Voltmeter
r VHF Sampling Coupler
r IBM PC/compatible Computer
r Oscilloscope
r Vertex Standard VPL-1 Connection Cable &

Alignment program

Alignment Preparation & Precautions

A 50W RF Dummy Load and in-line wattmeter must be
connected to the main antenna jack in all procedures that
call for transmission, except where specified otherwise.
Correct alignment is not possible with an antenna.

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

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

Whenever possible, alignments should be made with os­cillator shields and circuit boards firmly affixed in place.

Also, the test equipment must be thoroughly warmed up
before beginning.

Note: Signal levels in dB referred to in the alignment proce­dure are based on 0dBµV = 0.5µV into 50W.

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 beginning, and follow all of
the steps in a section in the order presented.

11

Alignment

Transceiver

Setup the test equipment as shown below, apply 13.6V
DC power to the transceiver.

The transceiver must be programmed for use in the in­tended system before alignment is attempted. The RF pa­rameters are loaded from the file during the alignment
process.

Important

In order to facilitate alignment over the complete switch­ing range of the equipment it is recommended that the
channel data in the transceiver is preset as the chart be­low.

CHANNEL

CH 1
CH 2
CH 3
CH 4

CHANNEL

SPACE

Wide

Narrow

Wide
Wide

FREQUENCY (SIMPLEX

Version A

147.100 MHz

147.100 MHz

134.100 MHz

159.900 MHz

)

Version D

161.100 MHz

161.100 MHz

148.100 MHz

173.900 MHz

PLL VCV

Connect the positive lead of the DC voltmeter to

¦

the test point TP1007 (VCV) on the RF-Unit, as
indicated in the figure, and the negative lead to
chassis ground.
Set the transceiver to the high band edge fre-

¦

quency channel, then adjust coil L1016 on the
Unit for 7.25V on the voltmeter.
Key the transmitter, and adjust coil L1017 on the

¦

Unit for 7.25V on the voltmeter.
Next select to the low edge frequency channel

¦

and confirm above 2.00V to 3.00V on the volt­meter.
Key the transmitter, and confirm above 2.00V to

¦

3.00V on the voltmeter.

PLL Reference Frequency

With the wattmeter, dummy load and frequency counter
connected to the antenna jack, and select band center fre­quency channel, key the transmitter and adjust VR1001
on the RF-Unit, if necessary, so the counter frequency is
within 100 Hz of the channel center frequency for the trans­ceiver version.

The alignment mode is accessed by “Alignment mode”
command from the computer whilst switching on. And it
is operated by the alignment tool automatically.

During the alignment mode, normal operation is suspend­ed. Use the alignment tool program running on PC.

L1017

L1016

TP1007

VR1001

RF Unit Test & Alignment Points

12