iv
3.2.2 Cleaning Procedures................................................................................ 3-1
3.3 Safe Handling of CMOS and LDMOS Devices ................................................... 3-2
3.4 Repair Procedures and Techniques — General ................................................. 3-2
3.5 Disassembling and Reassembling the Radio — General ................................... 3-3
3.6 Detailed Radio Disassembly ............................................................................... 3-4
3.6.1 Front Cover from Chassis Disassembly................................................... 3-4
3.6.2 Chassis Assembly/Disassembly............................................................... 3-6
3.6.3 Keypad, Display, and Keypad/PassPort/Option Board Disassembly....... 3-6
3.6.4 Speaker, Microphone, and Universal Connector Flex Disassembly ........ 3-8
3.6.5 PTT Disassembly ..................................................................................... 3-9
3.6.6 Control Top Disassembly ......................................................................... 3-9
3.7 Detailed Radio Reassembly.............................................................................. 3-10
3.7.1 Control Top Reassembly........................................................................ 3-10
3.7.2 PTT Reassembly.................................................................................... 3-10
3.7.3 Speaker, Microphone, and Universal Connector Flex Reassembly ....... 3-10
3.7.4 Keypad, Display, and Keypad/PassPort/Option Board Reassembly...... 3-10
3.7.5 Chassis Assembly Reassembly ............................................................. 3-11
3.7.6 Chassis and Front Cover Reassembly................................................... 3-11
3.7.7 DTMF Retrofit Kit Procedure (Optional Upgrade Procedure)................. 3-12
3.7.8 Option Board Installation........................................................................ 3-13
3.8 HT750 Radio Exploded Mechanical View and Parts List................................. 3-15
3.8.1 HT750 Exploded View........................................................................... 3-15
3.8.2 HT750 Exploded View Parts List............................................................ 3-16
3.8.3 HT1250 and HT1250•LS Exploded View ............................................... 3-17
3.8.4 HT1250 and HT1250•LS Parts List ........................................................ 3-18
3.8.5 HT1250•LS+ Exploded View.................................................................. 3-19
3.8.6 HT1250•LS+ Exploded View Parts List.................................................. 3-20
3.8.7 MTX850 Exploded View......................................................................... 3-21
3.8.8 MTX850 Exploded View Parts List......................................................... 3-22
3.8.9 MTX850•LS Exploded View ................................................................... 3-23
3.8.10 MTX850•LS Exploded View Parts List ................................................... 3-24
3.8.11 MTX8250 Exploded View....................................................................... 3-25
3.8.12 MTX8250 Exploded View Parts List....................................................... 3-26
3.8.13 MTX8250•LS Exploded View ................................................................. 3-27
3.8.14 MTX8250•LS Exploded View Parts List ................................................. 3-28
3.8.15 HT1550•XLS Exploded View.................................................................. 3-29
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