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.
A
A
Am
m
me
e
en
n
nd
d
dm
m
me
e
en
n
nt
t
ts
s
s

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.
W
W
Wa
a
ar
r
rn
n
ni
i
in
n
ng
g
gs
s
s

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
C
C
Co
o
on
n
nt
t
te
e
en
n
nt
t
ts
s
s

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/
I
I
In
n
nt
t
tr
r
ro
o
od
d
du
u
uc
c
ct
t
ti
i
io
o
on
n
n