Motorola Gm Series Detailed 6864115b62 A Manual

LB Range3 25-60W PCB 8485908z03 / Schematics4-41
* Motorola Depot Servicing only
Reference designators with an asterisk indicate 
components which are not fieldreplaceable 
because they need to be calibrated with 
specialized factory equipment after installation. 
Radios in which these par ts have been replaced in 
the field will be off frequency at temperature 
extremes.
R1212 0662057A25 100R1213
0662057A45
680
R1214 0662057A54 1.6K
R1215
0662057A21
68
R1216 0662057A18 51
R1217
0662057A25
100
R1218...

4-42LB Range3 25-60W PCB 8485908z03 / Schematics 

 Professional Radio
GM Series
UHF (403-470MHz)
Se rvice In fo rmation
Issue:  February  2001 

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 1 MODEL CHART AND TECHNICAL SPECIFICATIONS
1.0 GM140/GM160 Model Chart ........................................................................\
........ 1-1
2.0 GM340/GM360/GM380 Model Chart ................................................................... 1-1
3.0 GM640/GM660/GM1280 Model Chart ................................................................. 1-2
4.0 Technical Specifications ........................................................................\...

iv
Chapter 3 TROUBLESHOOTING CHARTS
1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ..................................... 3-1
1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ..................................... 3-2
2.0 Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) ......................... 3-3
2.1 Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3) ......................... 3-4
2.2 Troubleshooting Flow Chart for 25W Transmitter (Sheet 3 of 3)...

Chapter 1
MODEL CHART AND TECHNICAL SPECIFICATIONS
1.0 GM140/GM160 Model Chart
GM Series UHF 403-470 MHz
Model Description
MDM25RKC9AA1_EGM140, 403-470 MHz, 25-40W, 4 Ch
MDM25RKF9AA5_E GM160, 403-470 MHz, 25-40W, 128 Ch
Item Description
XGCN6112_Control Head GM140
X GCN6114_ Control Head GM160
XIMUE6024_SField Replaceable Unit (Main Board) GM140
X IMUE6024_S Field Replaceable Unit (Main Board) GM160
XXENBN4056_Packaging, Waris Mobile Radio
X X GLN7324_ Low Profile Mounting Trunnion
XXHKN9402_12V Power...

1-2 MODEL CHART AND TECHNICAL SPECIFICATIONS
2.0 GM340/GM360/GM380 Model Chart
GM Series UHF 403-470 MHz
Model Description
MDM25RHC9AN1_EGM340, 403-470 MHz, 1-25W, 6 Ch
MDM25RHF9AN5_E GM360, 403-470 MHz, 1-25W, 255 Ch
MDM25RHC9AN8_EGM380, 403-470 MHz, 1-25W, 255 Ch
MDM 25 RH A9A N0_E   Datab ox, 4 03-4 70  MHz,  1-2 5W , 16  Ch
Item Description
XGCN6112_Control Head GM340
X GCN6120_ Control Head GM360
XGCN6121_Control Head GM380
X GCN6116_ Databox Radio Blank Head
XIMUE6015_SField Replaceable Unit (Main...

GM640/GM660/GM1280 Model Chart1-3
3.0 GM640/GM660/GM1280 Model Chart
GM Series UHF 403-470 MHz
Model Description
MDM25RHC9CK1_EGM640, 403-470 MHz, 1-25W, 6 Ch
MDM25RHF9CK5_E GM660, 403-470 MHz, 1-25W, 255 Ch
MDM25RHN9CK8_EGM1280, 403-470 MHz, 1-25W, 255 Ch
MDM 25 RH A9C K7_E   Dat ab ox,  40 3-4 70  MHz,  1-2 5W ,  16  C h
Item Description
XGCN6112_Control Head GM640
X GCN6120_ Control Head GM660
XGCN6121_Control Head GM1280
X GCN6116_ Databox Radio Blank Head
XI M UE6009 _AS/T 403-470MHz 1-25 SEL5
X...

1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS
4.0 Technical Specifications
Data is specified for +25°C unless otherwise stated.
General Specifications
Channel Capacity
GM140
GM160
GM340
GM360
GM380
GM640
GM660
GM1280
Databox
4
128
6
255
255
6 
255
255
16
Power Supply 13.2Vdc (10.8 - 15.6Vdc)
Dimensions:  H x W x D (mm)  Depth excluding knobsGM140/340/640
56mm x 176mm x 177mm (1 - 25W)
56mm x 176mm x 189mm (25 - 40W)
(add 8mm for Volume Knob)
Dimensions:  H x W x D (mm)  Depth excluding knobsGM160/360/660...