Maxon CIC Europe PM200 User manual

Service Manual PM200/250
SM-PM200/250-01
PM200/250
Service Manual

Service Manual PM200
Page 2 of 54
AMENDMENT RECORD SHEET
All amendments to this manual should be incorporated as soon as they are received and
recorded below:
Issue No. Effective Date Reason for Change Date Signature
All Engineering Bulletins relevant to this product should be placed at the rear of this
binder. Please ensure that this manual is updated with any replacement pages, which
may accompany these Engineering Bulletins.
Always read all Engineering Bulletins before carrying out work on a radio.
Please read the WARNINGS on the next page before referring to subsequent
sections.
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Service Manual PM200
Page 3 of 54
WARNINGS
1. WARNING! NEVER connect the transceiver to an AC outlet. This may pose a fire hazard
or result in an electric shock.
2. NEVER operate the radio transmitter without a suitable artificial load or antenna connected.
3. NEVER connect the transceiver to a power source of more than 16V DC such as a 24V
battery.
4. NEVER cut the DC power cable between the DC Plug and fuse holder. If an incorrect
connection is made after cutting, the transceiver may be damaged.
5. NEVER place the transceiver where normal operation of the vehicle may be hindered or
where it could cause bodily injury.
6. NEVER expose the transceiver to rain, snow or any liquids.
7. NEVER modify a radio or accessory except as instructed in the service manual, engineering
bulletins or formal communication as this may invalidate any warranty, guarantee or type
approval.
8. USE the supplied microphone only. Other microphones have different pin assignments and
may damage the transceiver. (ACC-700, optional DTMF MIC. ACC-703 )
9. DO NOT use or place the transceiver in areas with temperatures below -30°C or above
+60°C, In areas subject to direct sunlight, such as the dashboard.
10. AVOID operating the transceiver without running the vehicle’s engine. The vehicle’s
battery will quickly run out if the transceiver transmits while the vehicle’s engine is OFF.
11. AVOID placing the transceiver in excessively dusty environments.
12. AVOID the use of chemical agents such as benzene or alcohol when cleaning, as they
damage the transceiver surfaces.
13. BE CAREFUL! The transceiver will become hot when operating continuously for long
periods.
14. DO NOT operate this equipment in environments containing explosive materials or
vapours.
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Service Manual PM200
Page 4 of 54
Contents
Amendments ....................................................... 2
Warnings ............................................................. 3
Introduction.......................................................... 6
Using this Manual.........................................................................................6
Amendments to this Manual........................................................................6
Specification ........................................................ 8
General ..........................................................................................................8
Transmitter....................................................................................................10
Receiver.........................................................................................................12
Maintenance and repair..................................... 14
Introduction...................................................................................................14
Test Equipment Connection........................................................................16
Microphone and PTT Connections .............................................................16
Transmitter Performance Tests...................................................................17
Receiver Performance Tests .......................................................................18
Alignment ......................................................................................................20
Disassembly and Re-assembly of the Radio................................21
PLL Alignment.................................................................................21
Transmitter TCXO Alignment.........................................................22
Receiver Alignment ........................................................................22
Receiver Performance Tests..........................................................23
Detailed functional description .......................... 25
UHF Transmit ................................................................................................25
UHF Receive..................................................................................................27
Control Details ..............................................................................................28
Troubleshooting................................................. 29
Diagnostic Function ....................................................................................29
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Service Manual PM200
Page 5 of 54
ASIC ................................................................. 30
ASIC Control ................................................................................................30
APC (Automatic Power Control) ....................... 35
Schematics and PCB layout Index.................... 37
Main Control Schematic
TX RF Schematic
RX RF Schematic
VCO Schematic
Front Panel Schematic
Main PCB Layouts
Front Panel PCB Layouts
Main PCB Silk Ref
Front Panel Silk Ref
RF RX Block Diagram
Parts List............................................................ 38
Mechanical Exploded View..........................................................................38
Parts List .......................................................................................................39
Contact Details .................................................. 54
Note:
Although this manual is a generic manual for PM200 and PM250 there
are a number of differences between PM200 and PM250. A separate
appendix has been written which includes the drawings and part list for
the PM250. Please be aware that all drawings and parts are only
relevant to the PM200. All features and functions are relevant to both
models. The PM250 appendix can be downloaded from the MaxonCIC
website http://www.maxoncic.co.uk/
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Service Manual PM200
Page 6 of 54
Introduction
This Maxon Service Manual is a comprehensive guide for the maintenance and field repair
of this equipment. It covers all versions of the PM-200/250 radio. Before using this manual
please read the whole of this introductory chapter, this will help you to make the best use
of it. If you have not done so already, please also read the warnings immediately in front of
this chapter before proceeding any further.
Using this Manual
The organization of this manual has been made to access the location and referencing of
information, as quickly as possible.
Section 3 - Installation, Commissioning & Alignment. This describes connections to the
radio, how to commission it and how to align the radio should this become necessary.
Section 4 - Detailed Functional Description.
Section 5 - Troubleshooting..
Amendments to this Manual
From time to time during its lifetime, this product will be changed and improved. To cover
such changes, amendments to this manual will be issued in the form of replacement
and/or additional pages. It is important that anyone working on a product has all the
relevant information. Therefore you should incorporate amendments to this manual on
receipt. Please follow the instructions accompanying the amendment (in the form of an
Engineering Bulletin) and be sure to complete the amendment record at the front of this
manual.
On occasion it may be necessary to issue product information more quickly than can be
achieved with an amendment. In this case the information will be distributed as a Maxon
Engineering Bulletin. Engineering Bulletin numbers are prefixed with a category letter – A,
B or C.
E.g. CATEGORY C – ENGINEERING BULLETIN 120
Category C describes how Maxon recommends an improvement and/or a modification to
make an improvement to a product
Engineering Bulletin 120 index number allocated to this bulletin.
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Service Manual PM200
Page 7 of 54
‘A’ Category A Engineering Bulletins will only be released if, by using the equipment
manufactured by Maxon or its subcontractors, a risk to operator safety or an infringement
of Type Approval is probable.
All units affected should be returned for modification to Maxon CIC Europe Works
Department on receipt of such a Bulletin.
‘B’ Category B Engineering Bulletins are for equipment manufactured by Maxon CIC
that may have component batch problems.
All equipment affected that is in service is to be returned to the Distributor or Dealer
workshop for modification. Maxon CIC will supply replacement components free of charge.
‘C’ Category C Engineering Bulletins are for improvement or modification to equipment
manufactured by Maxon.
Dealer/Distributor to modify affected units in the field on the next service call. Maxon will
supply components free of charge.
Please place these at the back of this manual and refer to them before carrying out any
work. This Service Manual should be updated with any accompanying replacement pages.
You may wish to retain the previous issue pages for future reference.

Service Manual PM200
Page 8 of 54
Specification
General
Performance Specifications R&TTE Directive 1999/5/EC
ETSI EN 300 086-1/-2; ETSI EN 300113-2
EMC Directive 89/336/EEC
ETSI EN 301 489-1/-5
LV Directive 73/23/EEC EN 60950-1
72/245 EC as assembled by 2004/104/EC
Frequency coverage (UHF) 440.000 – 480.000MHz
(VHF) 146.000 – 174.000MHz
Channel Spacing 12.5 kHz, / 25 kHz
(12.5 / 25 kHz switchable by CPU control)
RF Output Power PM200 2W - 25W nominal (+/-20%)
RF Output Power PM250 5W - 45W nominal (+/-20%)
Modulation Type F3E/G3E
Audio Power 4W (Internal 16Ωspeaker)
Intermediate Frequencies 45.1MHz First I.F.
455 kHz Second I.F.
Number of Channels 208 Channels
Frequency Source PLL Synthesiser
Frequency Stability +/- 2.5ppm
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Service Manual PM200
Page 9 of 54
Power Supply 13.8Vdc nominal
10.8Vdc minimum (extreme)
15.6Vdc maximum (extreme)
Current Consumption OFF <10µA
Standby (muted)<140mA
Unmuted with 25% AF power <350mA
Unmuted with 50% AF power <450mA
Unmuted with 100% AF power <1000mA
Transmit @ 2W RF output <2.0A
Transmit @ 25W RF output <7.0A
Environmental
Temperature Range
Operating -15 to +35°C (nominal)
-20 to +55°C (extreme),
Humidity EIA/TIA 603 (95%)
ESD 20kV (C-MIC = 15kV)
EMC EMC Directive 89/336/EEC May 89
ETS 301 489-1/-5
Physical Dimensions 161.8(W) mm x 168.8(D) mm x 44(H) mm
Weight 1.46kgs
Programmer PM200 PC Programmer
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Service Manual PM200
Page 10 of 54
Transmitter
Test Method is ETS 300.086 2001 unless stated. Performance without Sub-Audio
Modulation.
PM200 Power Output
High Power 25W nominal adjusted
Low Power 2W nominal adjusted
PM250 Power Output
High Power 45W nominal adjusted
Low Power 5W nominal adjusted
Audio Freq. Deviation
Nominal Peak
12.5 kHz +/-1.5 kHz +/-2.5 kHz
25 kHz +/-3.0 kHz +/-5.0 kHz
With or without audio sub-modulation (10% peak deviation)
Audio Characteristic
(Method as FTZ17 TR 2049 July 1988)
Modulation Type F3
Within +1/-3dB of limit wrt 1 kHz:
300Hz to 2.55 kHz for 12.5kHz channel spacing
300Hz to 3.0 kHz for 20 / 25kHz channel spacing
TX Spurious Emission (conducted and radiated)
Below 1GHz Better than –36dBm
1 – 4GHz Better than –30dBm
MIC Sensitivity
At Accessory/Mic connector 12mV +/- 3.5mV
Values for 60% peak dev.
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