UHF FM Transceiver
VX-5500U
Service Manual
©2003 VERTEX STANDARD CO., LTD. EC034U90A
POWER
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.
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-5500U UHF FM 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 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
Operating Manual Reprint......................... 1-1
Cloning ....................................................................
2-1
Specifications ................................................ 2-2
Exploded View & Miscellaneous Parts ... 3-1
Block Diagram .............................................. 3-2
Interconnection Diagram............................ 3-4
Circuit Description ..................................... 4-1
Alignment ...................................................... 5-1
Board Unit (
MAIN Unit........................................................... 6A-1
DISPLAY Unit ...................................................... 6B-1
KEY Unit ............................................................... 6C-1
VR Unit................................................................. 6D-1
MIC CONN Unit................................................. 6D-2
Optional Board Unit (
F2D-8 2-Tone Decode Unit ................................ 7A-1
VTP-50 VX-Trunk Unit ....................................... 7B-1
FVP-25 Encryption / DTMF Pager Unit ........... 7C-1
F5D-14 5-Tone Unit ............................................ 7D-1
FIF-7A Connection Unit ..................................... 7E-1
Schematics, Layouts & Parts
Schematics, Layouts & Parts
)
)
1
Front Panel
Operating Manual Reprint
CONTROLS & CONNECTORS
POWER
POWER Button
➀
Press the button to turn the transceiver ON and
OFF.
TX Indicator
➁
This lamp glows red when the radio is transmit-
ting.
BUSY Indicator
➂
This lamp glows green when the channel is busy.
Liquid Crystal Display
➃
The display include an 8-character alpha-numeric
section showing channel and group names, sta-
tus and identity information, and error messages.
Additional indicators on the display show prior-
ity channel assignments and scan include / ex-
clude selection.
This channel on
“S
ELECTABLE TONE” List
This channel on “PUBLIC
ADDRESS” or “SPEAKER”
List
This channel on
“HORN ALERT” List
This channel
on “OPTION”
List
This channel on “INTERCOM” List
Receiver Monitor
This channel on
“SCAN” List
Channel Group
Number
➄ / Button
Pressing these buttons changes the current group
(and displayed group number or name). Holding
this button for more than 1/2 second causes the
function to repeat.
SQC Indicator
➅
This lamp glows orange when incorrect position
at the setting of CE49.
Programmable Function Button (PF button)
➆
This button can be set up for special applications,
such as high/low power selection, monitor, dim-
mer, talk-around, and call alert function, as de-
termined by your network requirements and pro-
grammed by your VERTEX STANDARD dealer.
VOLUME Knob
➇
This knob sets the volume of the receiver.
EMERGENCY Microphone
➈
The emergency microphone is located behind this
small slit. When the emergency feature is acti-
vated, this Microphone is enabled.
CHANNEL Selector Knob
➉
This knob select the operating channel.
Programmable Function Button (PF button)
This button can be set up for special applications,
such as high/low power selection, monitor, dim-
mer, talk-around, and call alert function, as de-
termined by your network requirements and pro-
grammed by your VERTEX STANDARD dealer.
8 Character Alpha-numeric Display
This channel on “AUX A/B/C” List
1-1
Operating Manual Reprint
CONTROLS & CONNECTORS
Side Panel
Microphone Jack (It is on both sides.)
Connect the microphone plug to this jack.
Microphone Jack
REAR (Heatsink)
Antenna Socket
➀
The 50-ohm coaxial feedline to the antenna must
be connected here, using a type-M (PL-259) plug.
External Speaker Jack
➁
An external loudspeaker may be connected to this
2-contact, 3.5-mm mini-phone jack.
Caution: Do not connect this line to ground, and be
certain that the speaker has adequate capa-
bility to handle the audio output from the
VX-5500.
13.8-V DC Power Connector
➂
The supplied DC power cable must be connected
to this 4-pin connector. Use only the supplied
fused cable, extended if necessary, for power con-
nection.
DSUB 25-Pin Accessory Connector
➃
External TX audio line input, PTT (Push To Talk),
Squelch, and external RX audio line output sig-
nal may be obtained from this connector for use
with accessories such as data transmission/recep-
tion modems, ets.
1-2
Operating Manual Reprint
BASIC OPERATION OF THE TRANSCEIVER
Important! - Before turning on the radio the first time,
confirm that the power connections have been made cor-
rectly and that a proper antenna is connected to the an-
tenna jack.
Switching Power ON/OFF
Push the POWER switch turn on the radio. The
display will become illuminated. The radio will
start up on the last channel used prior to shut-
down during the previous operating session.
Turn the CHANNEL selector knob to choose the
desired operating channel. A channel name will
appear on the display. If you want to select the
operating channel from a different Memory Chan-
nel Group, press the UP () or DOWN () but-
ton to select the Memory Channel Group you
want before selecting the operating channel.
Setting the Volume
Turn the VOLUME knob clockwise to increase the
volume, and counterclockwise to decrease it. If
no signal is present, press and hold in the MON
button more than 1/2 seconds; background noise
will now be heard, and you may use this to set
the VOLUME knob for the desired audio level.
Press and hold the MON button more than 1/2 sec-
onds to quiet the noise and resume normal (quiet)
monitoring.
Transmitting
To transmit, wait until the “BUSY” indicator is
off (the channel is not in use), and press the PTT
(Push-To-Talk) switch on the side of the micro-
phone (the “TX” indicator will appear or the “TX”
indicator will glow red). While holding in the PTT
switch, speak across the face of the microphone
in a clear, normal voice level, and then release the
PTT switch to receive.
Selecting Groups and Channels
❍ Press the UP () or DOWN () button (repeat-
edly, if necessary) to select a different group of
channels.
❍ Turn the CHANNEL selector knob to select a
different channel within the current group.
Automatic Time-Out Timer
If the selected channel has been programmed for
automatic time-out, you must limit the length of
each transmission. While transmitting, a beep will
sound five seconds before time-out. Another beep
will sound just before the deadline; the “TX” in-
dicator will disappear and transmission will cease
soon thereafter. To resume transmitting, you must
release the PTT and wait for the “penalty timer”
to expire (if you press the PTT before this timer
expires, the timer restarts, and you will have to
wait another “penalty” period.)
1-3
Operating Manual Reprint
ADVANCED OPERATION
Programmable Function Button (PF button)
The VX-5500 includes the seven Programmable
Function Buttons (PF button). The PF button
functions can be customized, via programming
by your VERTEX STANDARD dealer, to meet
your communications/network requirements.
Some features may require the purchase and in-
stallation of optional internal accessories. The
possible PF button programming features are il-
POWER
Functions
None
SCAN (SCN)
Dual Watch
Call/Reset
Talk-Around (TA)
Alpha Numeric (A/N)
DIMMER (DIM)
Emergency (EMG)
Horn Alert (HA)
Home Channel (HOM)
Intercom (IC)
Low Power (LOW)
GRP UP
GRP DWN
CH UP
CH DWN
AUX A
AUX B
AUX C
Public Address (PA)
Monitor (MON)
RCL
Selectable Tone (ST)
SP*
Squelch Level (SQL)
Compander
Encryption** (OPT)
* requires RMK-4000 ** requires Encryption Unit
<1.5 sec
>1.5 sec
Programmable Function Button (PF button)
<1.5 sec
>1.5 sec
<1.5 sec
lustrated at the below, and their functions are ex-
plained on next page.
For further details, contact your VERTEX STAN-
DARD dealer. For future reference, check the box
next to each function that has been assigned to
the PF button on your particular radio, and keep
it handy.
>1.5 sec
<1.5 sec
>1.5 sec
<1.5 sec
>1.5 sec
<1.5 sec
>1.5 sec
<1.5 sec
>1.5 sec
1-4
Operating Manual Reprint
ADVANCED OPERATION
Channel Scan
The Scanning feature is used to monitor multiple
signals programmed into the transceiver. While
scanning, the transceiver will check each channel
for the presence of a signal, and will stop on a
channel if a signal is present.
To activate scanning:
❍ Press the assigned PF button of the “Scan” mo-
mentarily to activate scanning.
❍ The scanner will search the channels, looking
for active ones; it will pause each time it finds
a channel on which someone is speaking.
To stop scanning
❍ Press the assigned PF button of the “Scan”.
❍ Operation will revert to the channel to which
the CHANNEL selector knob is set.
Note:Your dealer may have programmed your
radio to stay on one of the following chan-
nels if you press the PTT switch during scan-
ning pause:
Current channel (“Talk Back”)
❒
“Last Busy” channel
❒
“Priority” channel
❒
“Home” channel
❒
Scan Start” channel
❒
Dual Watch
The Dual Watch feature is similar to the Scan fea-
ture, except that only two channels are monitored:
❒ The current operating channel; and
❒ The “Priority” channel.
To activate Dual Watch:
❍ Press the assigned PF button of the “Dual
Watch”.
❍ The scanner will search the two channels; it
will pause each time it finds a channel on which
someone is speaking.
❍ Press the assigned PF button of the “Dual
Watch”.
❍ Operation will revert to the channel to which
the CHANNEL selector knob is set.
ARTS (Auto Range Transpond System)
This system is designed to inform you when you
and another ARTS-equipped station are within
communication range.
During ARTS operation, your radio automatically
transmits for about 1 second every 25 (or 55) sec-
onds (the interval is programmed by Dealer) in
an attempt to Shake hands with the other station.
If you move out of range for more than one min-
utes, your radio senses that no signal has been
received, a ringing beeper will sound. If you sub-
sequently move back into range, as soon as the
other station transmits, your beeper will sound.
The PF Button Function
The PF (Programmable Function) button can be
programmed by the dealer to provide two of the
other functions described below.
To activate the primary Accessory function, press
the PF button momentarily. To access the second-
ary Accessory function (which may include the
Alarm), press and hold the PF button for 1.5 sec-
onds or longer.
Call/Reset
When this feature is programmed and a selective
call has been received, momentarily press the as-
signed PF button of the “Call/Reset” to reset the
flashing indicator and mute the receiver, other-
wise press the assigned PF button of the “Call/
Reset” to sent your radio’s identification code
(ANI) to the dispatcher.
Talk-Around
The feature causes the assigned PF button of the
“Talk-Around” to select simplex operation on
semi-duplex channels: the transmit frequency
becomes the same as the receive frequency (re-
gardless of any programmed offset for the chan-
nel).
Note:This feature has no effect on simplex channels.
After pressing the button, “-TAKARD-” is displayed
on the LCD.
Alpha Numeric
Press the assigned PF button of the “Alpha Nu-
meric” to switch the display between the Group/
Channel number, and the Group/Channel name
(alphanumeric). A tone will sound each time you
switch between numerical and alphanumerical
display.
1-5
Operating Manual Reprint
ADVANCED OPERATION
DIM
Press the assigned PF button of the “DIM” to ad-
just the brightness of the display and key
backright.
EMG (Emergency)
Press the assigned PF button of the “EMG” to
initiate an emergency call (requires ANI board).
When an emergency call is made, not tone is emit-
ted and the display does not change. To end the
emergency call, turn the transceiver power OFF.
HA (Horn Alert)
Press the assigned PF button of the “HA” to turn
the Horn Alert function ON or OFF. If you receive
a call from the base station with 2Tone or DTMF
signaling, horn alert will activate.
When you turn Horn Alert ON, a tone will sound
and “
” appears on the display.
Home (Home Channel)
Press the assigned PF button of the “Home” to
select the pre-programmed Home Channel. Press
it again to return to the previous channel. If used
while scanning, pressing this key a second time
will change to the revert channel.
IC (Intercom)
This feature requires dual head configuration.
Press the assigned PF button of the “IC” to turn
the intercom feature ON or OFF. While ON, you
can press the PTT switch to communicate to an-
other control head operator without transmitting
over the air. When you press this key, a tone
sounds and “
tercom can be used even while scanning and re-
ceiving a call.
” appears on the display. The in-
Low Power
Press the assigned PF button of the “Low Power”
to set the radio's transmitter to the “Low Power”
mode.
Press this key again to return to “High Power”
operation when in difficult terrain.
GRP UP/DWN
Press the assigned PF button of the “GRP UP” or
“GRP DWN” to select a different group of chan-
nels.
CH UP/DWN
Press the assigned PF button of the “CH UP” or
“CH DWN” to select a different channel within
the current group.
AUX A/B/C
Press the assigned PF button of the “AUX A”,
“AUX B”, or “AUX C” to turn the output port (re-
spectively).
PA (Public Address)
Press the assigned PF button of the “PA” to use
the transceiver as a PA amplifier. When you en-
able this function, a tone sounds and “ ” ap-
pears on the display. The public address can be
used even while scanning and receiving a call.
MONI (Monitor)
Press the assigned PF button of the “MONI” mo-
mentarily to cancel CTCSS and DCS signaling
squelch; the “MON” icon appears on the display.
Press and hold this key for 1/2 seconds to hear
background noise (unmute the audio); the MON
icon blinks on the display.
RCL (Channel Recall)
During scan, you can press the assigned PF but-
ton of the “RCL” to select the last called channel.
ST (Selectable Tone)
Press the assigned PF button of the “Selectable
Tone”, then rotate the CHANNEL selector knob
to select a 2-Tone.
SP
Press the assigned PF button of the “SP” to switch
“Front panel”, “Front panel & Body” and “Body”
speaker. When “Body” is selected, a tone sounds
and the “
can use this function while scanning and receiv-
ing a call. However, all audio will be emitted from
the PA speaker.
” icon appears on the display. You
SQL (Squelch Level)
You can manually adjust the squelch level using
this function:
1. Press the assigned PF button of the “SQL”. A
tone sounds and SQL appears on the display
with the current squelch level.
2. Rotate the CHANNEL selector knob to select
the desired level.
3. Press the this key. A tone sounds and the dis-
play returns to the normal channel.
1-6
ADVANCED OPERATION
COMP (Compander)
Press the PF button assigned to the “COMP”
function to turn the “Compander” IC ON or OFF.
This IC contains two variable gain circuits con-
figured for compressing and expanding the dy-
namic range of the radio's transmitted audio sig-
nal.
When you enable this function, the signal-to-noise
radio can be improved by reducing the transmit-
ted audio dynamic range.
Encryption (Option)
When the Voice Scrambler feature is enabled,
pressing the assigned PF button of the “Encryp-
tion” toggles the Scrambler on and off.
1-7
Operating Manual Reprint
OPTIONAL ACCESSORIES
MH-25
MH-53
MH-53
MH-53
CE49 Programming Software
CT-70 Radio Programming Cable (Requires VPL-1)
CT-71 Radio to PC Programming Cable
CT-72 Radio to Radio Programming Cable
CT-93 Cable for RMK-4000 (33 ft,10 m)
CT-81 Cable for RMK-4000 (20 ft, 6 m)
CT-82 Cable for RMK-4000 (8 ft, 2.5 m)
CT-83 Cable for RMK-4000 (2 ft, 0.6 m)
CNT-6000 Control Head
RF DECK RF Deck w/MMB-75 (for Dual Band Installations)
RMK-4000SH Remote Kit (for Single Transceiver)
RMK-4000DH Remote Kit (for Dual-Head Installations)
RMK-4000DB Remote Kit (for Dual Band Installations)
RMK-4000DBH Remote Kit (for Dual Band plus Dual Head Installations)
F2D-8 2-Tone Decode Unit (Requires FIF-7A)
F5D-14 5-Tone ENC-DEC Unit (Requires FIF-7A)
VTP-50 VX-Trunk Unit (Requires FIF-7A)
FVP-25 Band inversion scrambler/DTMF paging Unit (Requires FIF-7A)
FVP-35 Encryption Unit (Rolling code voice scrambler; Requires FIF-7A)
MDC1200 Digital ANI encoder Unit (Requires FIF-7A)
FP-1023 External 23A Power Supply
MLS-100 Mobile Loud speaker (12 W Peak Power)
MMB-75 Mobile Mounting Bracket
MMB-76 Locking Mobile Mounting Bracket
FIF-7A Inter face Board (for F2D-8, F5D-14, VTP-50, FVP-25)
CN-6 Inter face Board (for Accessories)
LF-1 Line Filter
B7A
C7A
A7A
B7A
Microphone
Heavy Duty Microphone
Heavy Duty Microphone w/Noise Canceler
Heavy Duty DTMF Microphone w/Noise Canceler
1-8
DSUB 25-PIN ACCESSORY CONNECTOR
Pin 1: RSSI [Analog Output]
A DC voltage proportional to the strength of the
signal currently being received (Receiver Signal
Strength Indicator) is provided on this pin. This
low impedance output is generated by the receiver
IF sub-system and buffered by an internal op-
amp. Typical voltages are graphed as follows:
Operating Manual Reprint
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
DSUB25 output level (V)
0
1259 398 125 398 12.5 4 1.25 0.4 0.125 0.04
SSG Input Level (uV)
Pin 2, 3, 4, 5 & 6: SELECT, DSUB 03, DSUB 04, DSUB
05 & DSUB 06
[Digital Input Port]
These input port features can be programmed via
the CE49 programmer. The same item can not be
chosen twice.
To select the “Input port” page, (Common ➠
DSUB-25 ➠ Input port).
Pin 2
Pin 4
Pin 6
Pin 3
Pin 5
DSUB 25-Pin Numbering
None
MON This feature is the same as pressing and
holding in the Monitor key.
DIMMERLCD illumination dimmer “on.”
Hook Activates the Hook1 feature.
SCAN Activates the scanner.
G-SCAN Activates the Group scanner.
RPT INH Disables the repeater feature during
Multi Deck operation.
EMG Activates the Emergency feature.
Home Switches to the Home Channel.
CH SW0 Memory channel recall
(Channel Switch Table bit 0)
CH SW1 Memory channel recall
(Channel Switch Table bit 1)
CH SW2 Memory channel recall
(Channel Switch Table bit 2)
CH SW3 Memory channel recall
(Channel Switch Table bit 3)
Example
If you assign “CH SW0” and “CH SW1” to the
Universal Input Port, you can recall Channels 1~3
as shown below.
Channel CH SW0 CH SW1
11 0
20 1
31 1
LOGIC level (+5V / 0V) input (Low active).
High Impedance input.
1-9
Operating Manual Reprint
DSUB 25-PIN ACCESSORY CONNECTOR
Similarly, if you assign “CH SW0,” “CH SW1,”
and “CH SW2” to the Universal Input Port, you
can recall Channels 1~7 as shown below:
Channel CH SW0 CH SW1 CH SW2
11 0 0
20 1 0
31 1 0
40 0 1
51 0 1
60 1 1
71 1 1
If you need to recall all memory channels (15 CH)
from the External Controller via the Uni-versal
Input Port, you should assign the “All Channel
Recall” Command (CH SW 0 ~ CH SW 3) to the
Universal Input Port.
In this case:
Channel CH SW0 CH SW1 CH SW2 CH SW3
11 0 0 0
20 1 0 0
31 1 0 0
40 0 1 0
51 0 1 0
60 1 1 0
71 1 1 0
80 0 0 1
91 0 0 1
10 0 1 0 1
11 1 1 0 1
12 0 0 1 1
13 1 0 1 1
14 0 1 1 1
15 1 1 1 1
The Memory Channel is determined via the CE49
Programmer. (Common ➠ DSUB-25pin connec-
tor ➠ Channel switch Table).
DSUB 25-Pin
PI NS 2, 3 , 4, 6
Sample Circuit
Pin 7: E [GND]
Ground for all logic levels and power supply re-
turn.
Pin 8: A KEY OUT [Universal Output Port]
Open collector output. Output voltage 0 ~ 5 V,
Max. sink current 30 mA.
The possible programming features (use CE49)
are illustrated below.
A PORT/B PORT/C PORT/D PORT/E PORT/
None
Refer to the “Pins 20, 21, & 22” section for details.
Pin 9: TXD [Digital Output for Alignment software]
Connect to the RS232C cable (requires FIF-8 and
CT-88)
Pin 10: RXD [Digital Input for Alignment software]
Connect to the RS232C cable (requires FIF-8 and
CT-88)
Pin 11: EXT PTT
Shorting this port to ground causes the transceiver
to be placed in the Transmit mode, while open-
ing the connection to this port returns the trans-
ceiver to the Receive mode.
1-10
Pin 12: MIC MUTE
MIC mute on: Level High (5V)
MIC mute off: Open
LOGIC level (+5V / 0V) output.
When the PTT/EXT PTT switch is pressed, this
pin switches to “open.”
Operating Manual Reprint
DSUB 25-PIN ACCESSORY CONNECTOR
Pin 13: TXDI [Digital Input for DATA Communications]
❍ TX Hi-speed Data Input Type (jumper JP2005).
Input level 800 mV/600 Ohms, Max.input 1.2V
❍ Tx Low-speed Data input Type (Jumper
JP2006). Input level 40 mV/600-Ohms
If the Jumper setting is “Low-speed Data” (JP2006
jumpered), this port is usable in the AUDIO
(300~3000 Hz) range.
If the jumper setting is “HI-speed Data” (JP2005
jumpered), this port is usable for 9600 bps DATA
communications, because the filter and limiter are
not engaged in the Audio line.
Pin 14: DC OUT
[13.4 V/5 V DC Output]
❍ Switched 13.8V output for supplying power to
an accessory (jumper JP2008).
❍ Switched and regulated DC 5.0V output for
supplying power to an accessory (jumper
JP2007).
Maximum output current is 200 mA
Pin 15: IGN
[Ignition Sense feature]
The VX-5500 may automatically be switched to
the STAND-BY mode when the vehicle's igni-tion
key is turned on.
Maximum current is 20 mA.
This feature is only enabled on transceivers con-
figured for Dual Deck operation.
Pin 17: RX DO [Digital Output for DATA Communications]
❍ RX Hi-speed Data Output Type (jumper
JP2003). output level 600 mV/10k Ohms
❍ RX Low-speed Data Output Type (jumper
JP2004). output level 200 mV/600 Ohms
If the Jumper setting is “Low-speed Data” (JP2004
jumpered), this port is usable in the AUDIO
(300~3000 Hz) range.
If the jumper setting is “HI-speed Data” (JP2003
jumpered), this port is usable for 9600 bps DATA
communications, because the filter and limiter are
not engaged in the Audio line.
Pin 18: E
[GND]
Ground for all logic levels and power supply re-
turn.
Pins 19, 20, 21, & 22: DSUB 19, DSUB 20, DSUB 21
and DSUB 22
[Universal Output Port]
LOGIC level (+5V / 0V) output.
The logic output appears at these pins when the
front panel's PF key is turned on.
The possible programming features (use CE49)
are illustrated below.
If the HA feature is assigned to these ports, a cur-
rent amplifier must be connected between the
Horn circuit and the port.
Pin 16: NC
Ignition 13.8V
[NO connection]
DSUB 25-Pin
None/A PORT/B PORT/C PORT/D PORT/E
PORT/HA PORT
Pin 23: EXT SQL
[Squelch Signal Output]
Open collector output. Max. sink current 10 mA.
A Signal is present (Squelch is open): Level High
No Signal is present (Squelch is closed): Open
When you connect the solder jumper on JP2002,
this port changes to PULL UP (5 V) output.
This status can be changed by CE49 programmer.
Pin 24: SP MUTE
[Speaker Mute Output]
Open collector output.
External Speaker mute on: Level High
External Speaker mute off: Open
Pin 25: E [GND]
Chassis ground.
1-11
Operating Manual Reprint
Note:
1-12
Cloning
The VX-5500 includes a convenient “Clone” feature,
which allows the programming data from one trans-
ceiver to be transferred to another VX-5500. Here is
the procedure for Cloning one radio's data to anoth-
er.
Note: When a cloning isn't made, you correct the fol-
lowing part using "CE49."
When a "Radio to Radio Clone" which is in the
"Miscellaneous" menu is "Disabled," change this
menu to "Enabled."
1. Turn both transceivers off.
2. Remove the plastic cap and its two mounting
screws from the Microphone jack on the trans-
ceiver. Do this for both transceivers.
3. Connect the optional CT-72 cloning cable be-
tween the Microphone jacks of the two trans-
ceivers.
4. On the Destination transceiver, press and hold
the PF Button (just below the POWER Button)
while turning the transceiver on.
5. Now, on the source transceiver, press and hold
the
Button while turning the transceiver
on.Data will now be transferred to the Destina-
tion transceiver from the source transceiver.
6. If there is a problem during the cloning process,
sound an error beep from source the transceiver.
Check your cable connections and battery volt-
age, and try again.
7. If cloning is a successful, turn the Destination
transceiver off. Now turn the source transceiver
off.
8. Disconnect the CT-72. Replace the plastic cap
and its two mounting screws.
9. You can then turn the transceivers back on, and
begin normal operation.
Optional Cloning Cable
CT-72
POWERPOWER
Destination source
DealerProgramming of VTP-50 and F5D-14
These procedures are designed to be used by the installing technician after the VTP-50 and F5D-14 has
been installed in the transceiver. To program a VX-5500's VTP-50 and F5D-14 board, you will need the
CT-71 programming interface cable, the CE-26 Programming diskette, and an IBM PC/AT or PS/2-
compatible type computer.
To enter the Programming mode, use the follow-
ing procedure:
1. Turn the transceiver off.
2. Turn on the transceiver while holding in the
PF Button (just below the
Button).
POWER
2-1
Specifications
GENERAL
Number of Channels: 250 channels
Frequency Range: 450 - 490 MHz
Channel Spacing: 5 / 10 / 12.5 / 15/ 20 / 25 / 50 kHz
Power Supply Voltage: 13.8V DC ±15 %
Current Consumption: Standby: 500 mA
Receive: 2.5 A
Transmit: 15 A (High)
Ambient 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: 7" (w) x 2.4" (H)x 7.7" (D) (178 x 60 x 195 mm)
Weight (Approx.): 4.9 lbs. (2.2 kg)
RECEIVER (Measurements made per EIA standard TIA/EIA-603)
Circuit Type: Double-conversion Super-heterodyne
Sensitivity(EIA 12 dB SINAD): 0.25 µV
Adjacent Channel Selectivity: 85/75 dB
Intermodulation: 80/75 dB
Spurious and Image Rejection: 90 dB
Audio Output: 12 W @ 4 Ohms w/5 % THD
TRANSMITTER (Measurements made per EIA standard TIA/EIA-603)
Power Output: 45 (Low:25 W)
Modulation: 16K0F3E, 11K0F3E
Max Deviation: 5.0/2.5 kHz
Conducted Spurious Emissions: 70 dB Below Carrier
FM Hum & Noise: 50/45 dB
Audio Distortion (@ 1 kHz): < 5 %
Measurements per EIA standards unless noted above.
Specifications subject to change without notice or obligation.
2-2
Screw List
REF. VXSTD P/N Description Qty.
1 U20306007 BINDING HEAD SCREW M3x6B 4
2 U20306002 BINDING HEAD SCREW M3x6NI 6
3 U24308002 TAPTITE SCREW M3x8NI 9
4 U23206001 TAPTITE SCREW M2.6x6 14
5 U20308002 BINDING HEAD SCREW M3x8NI 2
6 U24208001 TAPTITE SCREW M2.6x8 1
7 U20305007 BINDING HEAD SCREW M3x5B 2
8 U32450007 FLAT HEAD SCREW M2.6x5B 2
9 U31306007 OVAL HEAD SCREW M3x6B 2
10 S5000182 SCREW JFS-4S-B1MW 2
Accessories
Description VXSTD P/N Qty.
BLADE FUSE ATC 15A Q0000075 2
DC CABLE 02P 15AX2 T9021015 1
KNOB CAP RA0254100 5
NAME PLATE RA0254700 1
RA0253000
LCD HOLDER
VR Unit
VR3601*
RA0254000
RUBBER KNOB (PWR)
RA0254200
RUBBER PACKING
RA0251900
PANEL ASSY
➁
➁
Supplide is VR3601*
DISPLAY Unit
RA0252800
DIFFUSER SHEET
G6090140
LCD
➃
➃
RA0262600
HOLDER
MAIN Unit
RA0262400
PACKING SHEET
MIC CONN Unit
RA0252700
REFLECTOR SHEET
➃
➃
➃
➃
➃
KEY Unit
➀
➃
➃
➃
➃
R0145680
FITTING (x4 pcs)
M4090133
SPEAKER
➀
➂
➂
➂
➂
P1090654
CONNECTOR
(W/ *A)
MIC CONN Unit
➃
➃
➃
RA0254800
RA0252300
LIGHT GUIDE
RA0252900
RUBBER CONNECTOR
CONTACT ASSY (Both Side)
➂
➄
➂
➀
Exploded View & Miscellaneous Parts
RA0254900
CASE
➀
RA0262700
PACKING SHEET
Q6000114
TERMINAL STRIP
➅
➂
➄
*A
➂
RA0215000
EXT CAP
➂
➇
➁
➉
➉
➁
➁
RA0251500
CHASSIS
RA020830A
DOUBLE FACE (Both Side)
RA0215400
SHEET
➆
➆
S6000395
COVER P-25P(23)
T9206926
WIRE ASSY
➁
RA0262300
HOLDER PLATE
RA0262500
PACKING SHEET
S6000396
RUBBER GROMMET TM-96-17
P1090984
CONNECTOR
RA02543A0
KNOB
RA0254300
KNOB
➈
R6054387B
SPECIAL NUT
➈
RA0253900
RUBBER KNOB (CH)
RA0275500
RUBBER KNOB ASSY
Non-designated parts are available only as part of a
designated assembly.
3-1
Block Diagram
3-2
Block Diagram
3-3
Interconnection Diagram
3-4
Circuit Description
Reception and transmission are switched by "RX"
and "TX" lines from the microprocessor unit (MPU).
The receiver uses double-conversion super-hetero-
dyne circuitry, with a 43.95MHz 1st IF and 450 kHz
2nd IF. The 1st LO, produced by a PLL synthesizer,
yields the 43.95MHz 1st IF.
The 2nd LO uses a 43.5 MHz (43.95 MHz-450 kHz)
signal generated by a crystal oscillator. The 2nd mix-
er and other circuits use a custom IC to convert and
amplify the 2nd IF, and detect FM to obtain demod-
ulated signals. During transmit, the PLL synthesiz-
er oscillates at the desired frequency directly, for
amplification to obtain RF power output. During
transmit, voice modulation and CTCSS (or DCS)
modulation are applied to this synthesizer. Trans-
ceiver functions, such as Tx/Rx control, PLL synthe-
sizer settings, and channel programming, are con-
trolled using the MPU.
Receiver
Incoming RF signals from the antenna connector
are delivered to the MAIN Unit, and pass through a
low-pass filter (LPF) antenna switching network
consisting of coils L1008, L1004, L1022 and L1003,
capacitors C1338, C1337, C1336, C1335, and C1325,
and antenna switching diodes D1047, D1048 and
D1049 for delivery to the receiver front end.
Signals within the frequency range of the trans-
ceiver are then passed through a varactor-tuned
band-pass filter consisting of L1007, L1020 before RF
amplification by Q1018 (2SC3357).
The amplified RF is then band-pass filtered again
by varactor-tuned resonators L1009, L1011 to ensure
pure in-band input to 1st mixer Q1188, Q1189, Q1190,
Q1191 (2SK520 x 4).
Buffered output from the VCO Unit is amplified
by Q1032 (2SC5107), Q1192 (2SC3357) and low-
pass filtered by L1041 / L1045/ L1060 and C1153 /
C1154 / C1343 / C1174 / C1089, to provide a pure 1st
local signal between 406.05 and 446.05 MHz to the
1st mixer.
The 43.95MHz 1st mixer product then passes
through dual monolithic crystal filters XF1001 and
XF1002 (12 kHz BW)/ XF1003 and XF1004 (7kHz BW)
and is amplified by Q1041 (2SC4215Y) and deliv-
ered to the input of the FM IF subsystem IC Q1034
(TA31136FN).
This IC contains the 2nd mixer, 2nd local oscilla-
tor, limiter amplifier, FM detector, noise amplifier,
and squelch gates.
The 2nd LO in the IF-IC is produced from crystal
OSC X1001 (14.500MHz), and the 1st IF is converted
to 450kHz by the 2nd mixer and stripped of unwant-
ed components by ceramic filter CF1001 or CF1002.
After passing through a limiter amplifier, the signal
is demodulated by the FM detector.
Demodulated receive audio from the IF-IC is
amplified by Q2019 (CXA1846N). After volume ad-
justment by the AF power amplifier Q2018
(TDA7240AV), the audio signal is passed to the op-
tional headphone jack or 4 W loudspeaker.
PLL synthesizer
The 1st LO maintains stability from the PLL syn-
thesizer by using a 14.500 MHz reference signal from
crystal OSC X1001. PLL synthesizer IC Q1033
(SA7025DK) consists 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 charge
pump. The PLL-IC divides the 14.500 MHz refer-
ence signal by 725 using the reference counter (20.0
kHz comparison frequency). The phase detector
comparison frequency to be eight times the channel
spacing (2.5kHz). The VCO output is divided by the
prescaler, swallow counter and programmable
counter. These two signals are compared by the
phase comparator and input to the charge pump. A
voltage proportional to their phase difference is de-
livered 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 syn-
thesizer also operates as a modulator during trans-
mit.
The RX-VCO is comprised of Q1019 (2SK508) and
D1011, D1018 (1SV282 x 2), and oscillates between
406.050 MHz and 446.050 MHz according to the pro-
grammed receiving frequency. And the TX-VCO is
comprised of Q1020 (2SC4226-R24) and D1014,
D1015, D1020 (1SV284 x 3) and oscillates between
134.000MHz and 174.000MHz according to the pro-
grammed transmit frequency. The VCO output pass-
es through buffer amplifier Q1026 (2SC5107), and
a portion is fed to the buffer amplifier Q1029
(2SC5107) of the PLL IC, and at the same time am-
plified by Q1032 (2SC5107) to obtain stable output.
The VCO DC supply is regulated by Q1006
(2SC4154E). Synthesizer output is fed to the 1st
mixer by diode switch D1021 (1SS321) during re-
ceive, and to drive amplifier Q1031 (2SC3356) /
Q1025 (2SC3357) for transmit.
4-1
Circuit Description
Transmitter
Voice audio from the microphone is delivered via
the MIC (Jack) Unit to the MAIN Unit, after passing
through amplifier Q3039/Q2041 (NJM2902V), pre-
emphasis, limiter (IDC instantaneous deviation con-
trol), and LPF Q2001 (NJM2902V), is adjusted for
optimum deviation level and delivered to the next
stage.
Voice input from the microphone and CTCSS are
FM-modulated to the VCO of the synthesizer, while
DCS audio is modulated by the reference frequency
oscillator of the synthesizer.
Synthesizer output, after passing through diode
switch D1025 (1SS321), is amplified by driver Q1031
(2SC3356) / Q1025 (2SC3357) and power module
Q1017 (RA45H4552M) to obtain full RF output. The
RF energy then passes through antenna switch
D1047 / D1048 and a low-pass filter circuit and fi-
nally to the antenna connector.
RF output power from the final amplifier is sam-
pled by CM coupler and is rectified by D1037, D1038
(HSM88AS x 2). The resulting DC is fed through
Automatic Power Controller Q1007 (NJM2902V) to
transmitter RF amplifier and thus the power out-
put.
Generation of spurious products by the transmit-
ter is minimized by the fundamental carrier frequen-
cy being equal to the final transmitting frequency,
modulated directly in the transmit VCO. Addition-
al harmonic suppression is provided by a low-pass
filter consisting of L1008 L1004, L1002, L1001 and
C1338, C1336, C1337, C1335, C1334, C1333 and
C1332, resulting in more than 60 dB of harmonic sup-
pression prior to delivery to the RF energy to the
antenna.
DCS Demodulator
DCS signals are demodulated on the MAIN-
UNIT, and are applied to low-pass filter Q2040
(NJM2902V), as well as the limiter comparator
Q2003.
CTCSS encoder/decoder
The CTCSS code is generation and encoding by
MPU IC Q2025 (MB90F583B).
Demodulation and detection of the CTCSS tones
are carried out by IC Q2017 (MX165C).
MPU
Operation is controlled by 16-bit MPU IC Q2025
(MB90F583B). The system clock uses a 16.000 MHz
crystal for a time base. IC Q2035 (RN5VL35AA) re-
sets the MPU when the power is on, and monitors
the voltage of the regulated 5V power supply line.
EEPROM
The EEPROM retains TX and RX data for all mem-
ory channels and CTCSS data, DCS data, prescaler
dividing, and REF oscillator data (internal/external).
4-2
Alignment
The VX-5500 has been carefully aligned at the
factory for the specified performance across the fre-
quency range specified for each version.
Realignment should therefore not be necessary
except in the event of a component failure, or when
altering the transceiver version. If a sudden prob-
lem occurs during normal operation, it is likely due
to component failure; realignment should not be
done until after the faulty component has been re-
placed. All component replacement and service
should be performed only by an authorized
VERTEX STANDARD representative, or the warran-
ty policy may be voided. Therefore, if a fault is sus-
pected, contact the dealer from whom the transceiver
was purchased for instructions regarding repair.
Authorized VERTEX STANDARD service tech-
nicians realign all circuits and make complete per-
formance checks to ensure compliance with factory
specifications after replacing any faulty components.
Those who do undertake any of the following align-
ments are cautioned to proceed at their own risk.
Problems caused by unauthorized attempts at re-
alignment are not covered by the warranty policy.
Also, VERTEX STANDARD must reserve the right
to change circuits and alignment procedures in the
interest of improved performance, without notify-
ing owners.
Under no circumstances should any alignment
be attempted unless the normal function and oper-
ation of the transceiver are clearly understood, the
cause of the malfunction has been clearly pinpoint-
ed and any faulty components replaced, and the
need for realignment determined to be absolutely
necessary.
Required Test Equipment
The following test equipment (and thorough fa-
miliarity with its correct use) is necessary for com-
plete realignment. Correction of problems caused
by misalignment resulting from use of improper test
equipment is not covered under the warranty poli-
cy.
While most steps do not require all of the equip-
ment listed, the interactions of some adjustments
may require that more complex adjustments be per-
formed 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 beginning, and follow all of the steps in a sec-
tion in the order presented.
❒ RF signal generator: calibrated output level at
1000 MHz
❒ Deviation Meter (linear detector)
❒ AF Millivoltmeter
❒ SINAD Meter
❒ Inline Wattmeter with 5% accuracy at 1000 MHz
❒ Regulated DC Power Supply: adjustable from 10
to 17 VDC, 15A
❒ 50-ohm non-reactive Dummy Load: 100 W at 1000
MHz
❒ Frequency Counter: <0.1 ppm accuracy at 1000
MHz
❒ AF Signal Generator
❒ DC Voltmeter: high impedance
❒ RF Sampling Coupler (attenuation pad)
❒ AF Dummy Load: 4 ohms, 20W
❒ Oscilloscope
❒ Spectrum Analyzer
❒ IBM PC-compatible computer w/
VERTEX STANDARD CT-71 programming cable
and CE49 channel programming editor.
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be con-
nected 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 follow-
ing step to determine whether the same test equip-
ment will be required. If not, remove the test equip-
ment (except dummy load and wattmeter, if con-
nected) before proceeding.
Correct alignment requires that the ambient tem-
perature be the same as that of the transceiver and
test equipment, and that this temperature be held
constant between 68° and 86°F (20° ~ 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 environment before alignment.
If possible, alignments should be made with oscilla-
tor shields and circuit boards firmly affixed in place.
Also, the test equipment must be thoroughly
warmed up before beginning.
5-1
Alignment
Before beginning, connect the transceiver and PC
using the CT-71 programming cable, and download
the EEPROM data from the transceiver to the com-
puter.
Store this data in a disk file so that it can be saved
and retrieved later. Using the table below, program
the channel, CTCSS, and DCS alignment settings for
your transceiver version. Upload this file to the
transceiver.
Note:Signal levels in dB referred to in this proce-
dure are based on 0 dBµ = 0.5 µV (closed cir-
cuit).
Caution:Do not connect the audio output line to
ground, and be certain that the speaker has
adequate capability to handle the audio
output from the radio.
Because of the bridge audio amplifier cir-
cuit used in the radio, it is necessary to con-
struct and use a simple audio load test
adapter as shown in the schematic diagram
below, when conducting receiver align-
ment steps.
3.5 PLUG
2-ohm
10W
2-ohm
10W
(4-ohm Dummy Load)
AF Test Adapter Schematic
470uF
Attenuate d
Tes t Ou tp ut( 1/ 2)
GND
Alignment Channel Frequencies
Channel
CH1 450.01 MHz
CH2 470.01 MHz None None Wide
CH3 489.99 MHz
CH4 450.01 MHz
CH5 470.01 MHz None None Narrow
CH6 489.99 MHz
CH7 470.01 MHz 151.4 Hz None Wide
CH8 470.01 MHz None 023 Wide
CH9 470.01 MHz 151.4 Hz None Narrow
CH10 470.01 MHz None 023 Narrow
Frequency CTCSS DCS
(simplex) Encode Encode
Narrow/Wide
PLL & Transmitter
Set up the test equipment as shown for transmit-
ter alignment.
Maintain the supply voltage at 13.8 V DC for all
steps.
RF Signal
Generator
Inline Wattmeter
Deviation Meter
Frequency
Counter
RF Sampling
Coupler
CT-71 connection
Cable
PC
COM port
Transceiver
Power Supply
13.8V DC
PLL VCV
❒ Connect the positive lead of the DC voltmeter to
test point TP1008 (VCV) on the Main Unit, as in-
dicated in the figure, and connect the negative
lead to chassis ground.
❒ Set the transceiver to the high band edge fre-
quency channel (CH3 or CH6), then key the trans-
mitter, and adjust L1026 on the Main Unit for 4.35
V ±0.05 V on the voltmeter.
❒ Adjust L1023 on the Main Unit for 4.3 V ±0.1 V
on the voltmeter.
❒ Next select to the low edge frequency channel
(CH1 or CH4) and confirm the VCV is more than
1.0 V on the voltmeter.
❒ Key the transmitter, and confirm the VCV is more
than 0.8 V 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 (CH2 or CH5), key
the transmitter and adjust VR1001 on the Main Unit,
if necessary, so the counter frequency is within 100
Hz of the channel center frequency for the trans-
ceiver version.
5-2
Alignment
Transmitter Output Power
The following transmitter parameters can be ad-
justed from the computer by utilizing the Alignment
Software. Refer to the onboard help of the Align-
ment Software Manual for details.
❒ Select the band center frequency channel (CH2
or CH5), and select the “high” power output level.
Key the transmitter and adjust “TX PWR Hi“ for a
power output of 45 Watts (± 1.0 W) as indicated
on the wattmeter.
❒ Stay on the band center frequency channel (CH2
or CH5), and select the “low” power output level.
Key the transmitter and adjust “TX PWR L3“ for
a power level of 25 Watts (± 0.5 W) as indicated
on the wattmeter.
Transmitter Deviation
The following modulation parameters can be ad-
justed from the computer by utilizing the Alignment
Software. Refer to the onboard help of the Align-
ment Software Manual for details.
Microphone Audio Modulation Level
❒ Select the band center frequency channel (CH2),
and select the “low” power output level.
❒ Adjust the AF generator for 50mV (–30dBm) out-
put at 1 kHz, as applied to the microphone jack.
❒ Key the transmitter and adjust “MAX Dev (wide)“
for maximum deviation of 4.3 kHz ± 0.1 kHz as
indicated on the deviation meter.
❒ Select the band center frequency channel (CH5),
and select the “low” power output level.
❒ Adjustdjust the AF generator for 50mV (–30dBm)
output at 1 kHz, as applied to the microphone
jack.
TP1008L1023L1026 VR1001
5-3
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