Motorola Radius Cm200 Cm300 Pm400 Detailed 6881098c00 A Manual

Notes For All Schematics and Circuit Boards2-5
5.0 Notes For All Schematics and Circuit Boards
* Component is frequency sensitive. Refer to the Electrical Parts List for value and usage.
1.Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads 
(pF) or microfarads (µF).
2.DC voltages are measured from point indicated to chassis ground using a Motorola DC 
multimeter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in 
series with the...

2-6MAINTENANCE
MIC_PTT_CH Microphone PTT Input
MOD_IN Modulation Signal from ASFIC
MOD_OUT Modulation Signal to the Synthesizer
ONOFF_SENSE On off sense switch
OPT_DATA_R_OPRD DATA/Ready Request from Option Board
OPT_EN_OPBD Option Board Chip Select
PA_BIAS PA Control bias voltage
PA_CURRENT Not used
POST_LIMITER_TX 
AUDIO_RETURN_OPT_BRDFlat TX Input from Option Board
PROG x IN ACC y General Purpose Input x accessory connector Pin y
PROG x INOUT ACC y General Purpose Input/Output x accessory connector...

Notes For All Schematics and Circuit Boards2-7
VS AUDIO_SEL Switch signal to Enable option board audio output signal
VS GAIN_SEL Voice Storage Gain Select line
VS_MIC Voice Storage Audio Signal to microphone path
VS_INT Voice Storage Interrupt line
VS_RAC Voice storage Row Address Clock Signal
VSTBY 3.3 V supply for µP when the radio is switched off 

2-8MAINTENANCE
Notes 

Chapter 3
SERVICE AIDS
1.0 Recommended Test Tools
Table 3-1 lists the service aids recommended for working on the radio. While all of these items are 
available from Motorola, most are standard workshop equipment items, and any equivalent item 
capable of the same performance may be substituted for the item listed.
Table 3-1   Service Aids
Motorola Part 
No.Description Application
RLN4460_Portable Test SetEnables connection to audio/accessory jack. 
Allows switching for radio testing.
RVN4191_ Customer...

3-2SERVICE AIDS
2.0 Test Equipment
Table 3-2 lists test equipment required to service the radio and other two-way radios.
Table 3-2   Recommended Test Equipment
Motorola Part No. Description Characteristics Application
R2000, R2600, 
R2400, or R2001 
with trunking 
option for Privacy 
Plus™ and 
Smartnet 
Systems™ 
†
Service MonitorThis monitor will 
substitute for items 
listed below with an 
asterisk *Frequency/deviation meter and 
signal generator for wide-range 
troubleshooting and alignment
*R1049...

CM200/CM300/PM400
Radios
Control Head
Service Information
Issue: November, 2007
M 

ii
Computer Software Copyrights
The Motorola products described in this manual may include copyrighted Motorola computer programs stored 
in semiconductor memories or other media. Laws in the United States and other countries preserve for 
Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or 
reproduce in any form, the copyrighted computer program. Accordingly, any copyrighted Motorola computer 
programs contained in the Motorola products described...

iii
Table of Contents
Chapter 1OVERVIEW
1.0 CM200 Model....................................................................................................... 1-1
2.0 CM300/PM400 Models ........................................................................................ 1-1
Chapter 2THEORY OF OPERATION
1.0 Introduction .......................................................................................................... 2-1
2.0 Control Head Model for CM200...

iv
2.1 Control Head PCB 8488998U01 Parts List .................................................... 4-5
3.0 Control Head CM300/PM400 - PCB 8489714U01 / Schematics ......................... 4-6
3.1 Control Head PCB 8489714U01 Parts List .................................................... 4-8