Motorola HT1250, HT1250LS, HT1250LS+, HT1550XLS, HT750, MTX8250, MTX8250LS, MTX850, MTX850LS, MTX9250, MTX950, Portable Radios, Professional Radio 3.6.4 Speaker, Microphone, and Universal Connector Flex Disassembly

3-8 Maintenance

Figure 3-5: Removing the Keypad Retainer and Other Boards from the Radio

3.6.4 Speaker, Microphone, and Universal Connector Flex Disassembly

1. If disassembly of the speaker-microphone assembly is necessary, remove the dustcover by

turning the scr ew at the bot tom of th e du stc ov e r counterclockwise with your fingers. Lift the

dustcover out of its pocket.

2. Using a screwdriver , push down on the portion of the speaker retainer bracket pointing toward the

bottom of the radio. Then, remove the retainer by slightly pushing it toward the top of the radio

until you slide it past the front cover slot.

3. Pull the rubber microphone boot from its seated position. Unless you are replacing the

microphone, leave it in the boot.

4. Peel-off the universal connector flex circuit escutcheon (l abel).

5. Pry the flex circuit (adh esive held) backer board away from the front cover, and remove the

universal connector tail of the speaker-microphone assembly through its opening in the front

cover.

NOTE: At this point, the Optio n Board Installation Procedure should be performed, if

necessary. (See page 3-13)

NOTE: The dustcover must be removed to remove the speaker-microphone assembly flex

circuit. The speaker is held in place with a two-legged retainer bracket. The bracket

legs are secured by the front cover slot s . Be careful no t to damage the speaker when

removing the retainer bracket.

NOTE: The speaker-microphone assembly flex circuit goes through the front cover wall to

the outside wall. To replace this assembly, you must pee l-off the univ ersal co nnec tor

escutcheon label. The existing escutcheon cannot be reassembled; a new part must

be used. (See item number 10 on the exploded view drawing on page 3-15).

Retainer

Display

Module Keypad

Option

Board

Keypad

Radio

Body

Contents

Main Foreword Product Safety and RF Exposure Compliance Computer Software Copyrights Document Copyrights Disclaimer Table of Contents Page Page Page Page Page LIST OF FIGURES Page LIST OF TABLES Page Chapter 1 Introduction 1.1 Scope of Manual 1.2 Warranty and Service Support 1.2.1 Warranty Period and Return Instructions 1.2.2 After Warranty Period 1.2.3 Piece Parts Availability 1.2.4 Technical Support 1-4 Introduction 1.3 Radio Model Information A or LA = Motorola Internal Use Revision Model H = Portable Level Model Chapter 2 Intrinsically Safe Radio Information 2.1 FMRC Approved Equipment FM 2.2 Repair of FMRC Approved Products 2.2.1 Repair 2.2.2 Relabeling Page Page Chapter 3 Maintenance 3.1 Introduction 3.2 Preventive Maintenance 3.2.1 Inspection ! 3.3 Safe Handling of CMOS and LDMOS Devices 3.4 Repair Procedures and Techniques General 3.5 Disassembling and Reassembling the Radio General 3.6 Detailed Radio Disassembly 3.6.1 Front Cover from Chassis Disassembly Page 3.6.2 Chassis Assembly/Disassembly 3.6.3 Keypad, Display, and Keypad/PassPort/Option Board Disassembly Page 3.6.4 Speaker, Microphone, and Universal Connector Flex Disassembly 3.6.5 PTT Disassembly 3.6.6 Control Top Disassembly 3.7 Detailed Radio Reassembly 3.7.1 Control Top Reassembly 3.7.2 PTT Reassembly 3.7.3 Speaker, Microphone, and Universal Connector Flex Reassembly 3.7.4 Keypad, Display, and Keypad/PassPort/Option Board Reassembly 3.7.5 Chassis Assembly Reassembly 3.7.6 Chassis and Front Cover Reassembly 3.7.7 DTMF Retrofit Kit Procedure (Optional Upgrade Procedure) 3.7.8 Option Board Installation Page 3.8.15 HT1550XLS Exploded View 3.8.16 HT1550XLS Exploded View Parts List Table 3-8. HT1550XLS Parts List Item Motorola Part Number Description Table 3-8. HT1550XLS Parts List (Continued) Item Motorola Part Number Description 3.9 Service Aids Motorola Part No. Description Application 3.10 Test Equipment Motorola Part No. Description Characteristics Application Page 3-38 Configuring and Wiring the Programming/Test Cable Figure 3-24: Programming/Test Cable Schematic P2 TO RADIO TEST SET RLN4460 P1 TO RADIO UNIVERSAL CONNECTOR J1 TO RIB RLN4008 Chapter 4 Transceiver Performance Testing 4.1 General 4.2 RF Test Mode Page Page Number of Side Button 1 Presses No. of Beeps Display Shows Description Function Item No. No. of Beeps Description Function Number of Low Tones Channel Spacing 4.3 Test Frequencies for Display and Non-Display Radios Channel Selector Switch Position Test Channel Low 1 Low 2 VHF UHF 1 UHF 2 800 4.4 Receiver Performance Tests Test Name Service Monitor Radio Test Set Comments Test Name Service Monitor Radio Test Set Comments Page 5.2 Global Radio Tuning Setup 5.2.1 Initial Test Equipment Setup Service Monitor Test Set Power Supply 5.3 CPS Programming Setup 5.4 Cloning (Conventional and LTR) 5.4.1 Error Codes (Display Radios Only) 5.5 Cloning (Privacy Plus) 5.6 Cloning (PassPort) 5.7 Lowband Molded Antenna Cut Chart Frequency Verification Chart 5.8 HT1250LS+ PassPort Tone Options 5.9 HT1250LS+ Special Diagnostic Functions Page Chapter 6 Power Up Self-Test 6.1 Error Codes - Conventional and LTR Radios If the error code displayed is... then, there is a... To correct the problem... 6.2 Error Codes - Privacy Plus 6.3 Error Codes - PassPort 6.4 Operation Display Codes If the error code displayed is... then, there is a... To correct the problem... Failure Code Description Possible Source Page Chapter 7 Accessories 7.1.1 Antennas 7.1.2 Carrying Accessories 7.1.3 Carry Cases 7.1.4 Chargers 7.1.5 Vehicular Accessories 7.1.6 Batteries 7.1.7 Adapters 7.1.8 Miscellaneous 7.1.9 Service Aids 7.1.10 Audio Accessories 7.1.11 Option Boards* (All option boards below are not compatible with HT1550XLS) * 7.1.14 Retrofit Front Cover Kits 7.1.12 Remote Speaker Microphones 7.1.13 Manuals Page Chapter 8 Model Chart and Test Specifications 8.1 UHF 403470 MHz (Conventional) Note: Models ending in FD are Federal Government Radios Only. HT Series, UHF, 403470 MHz 8.2 UHF 450512 MHz (Conventional) HT Series, UHF, 450512 MHz 8.3 UHF 403470 MHz (LTR and PassPort) HT Series, UHF, 403470 MHz (LTR & PassPort) 8.4 UHF 450512 MHz (LTR and PassPort) HT Series, UHF, 450512 MHz (LTR & PassPort) 8.5 UHF 403470 MHz (Conventional/LTR) HT Series, UHF, 403470 MHz (Conventional/LTR) 8.6 UHF 450512 MHz (Conventional/LTR) HT Series, UHF, 450512 MHz (Conventional/LTR) 8.7 VHF 136174 MHz Note: Models ending in FD are Federal Government Radios Only HT Series, VHF, 136174 MHz 8.8 VHF 136174 MHz (Conventional/LTR) HT Series, VHF, 136174 MHz (Conventional/LTR) 8.9 VHF, 136174 MHz (LTR & PassPort) HT Series, VHF, 136174 MHz (LTR & PassPort) 8.10 LowBand 29.742/3550 MHz Note: Models ending in FD are Federal Government Radios Only HT Series, Lowband, 29.742/3550 MHz 8.11 800 MHz (LTR) 8.12 800 MHz (Privacy Plus) MTX Series, 806866 MHz (LTR) MTX Series, 806866 MHz (Privacy Plus) 8.13 900 MHz (Privacy Plus) MTX Series, 896941 MHz (Privacy Plus) 8.14 Specifications, HT750 Radio Page 8.15 Specifications, HT1250 Radio Page 8.16 Specifications, HT1250LS+ Radio Specification UHF VHF Specification UHF / VHF Specification UHF/VHF 8.17 Specifications, HT1550XLS Radio Page 8.18 Specifications, MTX850/MTX8250 (800 MHz), MTX950/MTX9250 (900 MHz) Radios General Transmitter Receiver 8.19 Specifications, MTX850LS and MTX8250LS (800 MHz) Radios General Transmitter Receiver Specification 800 MHz Glossary