Motorola EP350 Basic Service Manual
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Motorola EP350 Basic Service Manual

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  • Page 3 Service Manuals need to be updated accordingly. If you wish to be informed of these updates, kindly fill in and fax us your details. Fax to: 6-04-6194467 The Technical Publications Coordinator, Global Customer Documentation, R&D Department, Motorola Penang. Your Details Name/Contact Person: Company Name: Address: Telephone No.: Fax No.:...
  • Page 4 Kindly take a few moments to provide feedback on this manual. Thank you for your cooperation. Fax to: 6-04-6194467 The Technical Publications Coordinator, Global Customer Documentation, R&D Department, Motorola Penang. 1. Please check all the appropriate boxes: Disassembly Procedures Alignment Procedures...

  • Page 5: Computer Software Copyrights

    Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive royalty-free license to use that arises by operation of law in the sale of a product.

  • Page 6: Safety

    Product Safety and RF Exposure booklet enclosed with your radio (Motorola Publication part number 68007024010) to ensure compliance with RF energy exposure limits. For a list of Motorola-approved antennas, and other accessories, visit the following web site which lists approved accessories: http://www.motorola.com/governmentandenterprise...

  • Page 7: Document History

    DOCUMENT HISTORY The following major changes have been implemented in this manual since the previous edition: Edition Description Date 6878419A01-A Initial edition Feb. 2009 6878419A01-B Added UHF1 403 – 447 MHz information Sept. 2009 CHAPTER 1 : Model Charts and Test Specifications Updated UHF1 range to 403 –...
  • Page 8 Notes...

  • Page 9: Table Of Contents

    Table of Contents Table of Contents Copyright ......................i Safety ......................ii Document History ..................iii Chapter 1 Model Charts and Test Specifications ......1-1 Radio Model Information........................ 1-1 Model Chart for UHF2, 435–480 MHz ................... 1-2 Model Chart for VHF, 136–174 MHz ..................... 1-3 Model Chart for UHF1, 403–447 MHz ...................
  • Page 10 Chassis and Front Housing Reassembly............6-17 Torque List ........................... 6-17 Mechanical View and Parts List ....................6-18 6.7.1 EP350 (Full Keypad without Channel Knob) Exploded View and Parts List ....6-18 Chapter 7 Maintenance – EP350 (Limited Keypad Model) ....7-1 Introduction ............................ 7-1...
  • Page 11 Chassis and Front Housing Reassembly............7-17 Torque List........................... 7-18 Mechanical View and Parts List....................7-18 7.7.1 EP350 (Limited Keypad without Channel Knob) Exploded View and Parts List ..... 7-18 Chapter 8 Troubleshooting Tables ............. 8-1 Error Codes ........................... 8-1 Troubleshooting Table for Receiver....................8-2 Troubleshooting Table for Transmitter...................
  • Page 12 Figure 6-33. Main Circuit Board, finger strips, O-ring and Battery Contact Seal Reassembly(UHF1) 6-16 Figure 6-35. Chassis Assembly and Front Housing Assembly Reassembly ........6-17 Figure 6-36. EP350 (Full Keypad without Channel Knob)Radio Exploded View ........ 6-18 Figure 7-37. Limited Keypad Without Channel Knob Model ..............7-6 Figure 7-38.
  • Page 13 Figure 7-54. Main Circuit Board, finger strips, O-ring and Battery Contact Seal Reassembly(UHF1) 7-16 Figure 7-55. Sub Circuit Board and Accessory Bracket Reassembly..........7-17 Figure 7-56. Chassis Assembly and Front Housing Assembly Reassembly ........7-17 Figure 7-57. EP350 (Limited Keypad without Channel Knob) – Exploded View ........ 7-18...
  • Page 14 Related Publications LACR EP350 Series Radios User Guide (English, Latin American Spanish, Brazilian Portuguese)..........6878081A01 EP350 Series Radios Quick Reference Card (English, Latin American Spanish, Brazilian Portuguese)..........68007024010 EP350 Basic Service Manual ....................6878419A01 EP350 Detailed Service Manual ....................6878422A01 Product Safety and RF Exposure Booklet ................6881095C98...

  • Page 15: Notations Used In This Manual

    Notations Used in This Manual Notations Used in This Manual Throughout the text in this publication, you will notice the use of the following notations. These notations are used to emphasize that safety hazards exist, and due care must be taken and observed. An operational procedure, practice, or condition that isessential to emphasize.
  • Page 16 Summary of Bands Available Summary of Bands Available Table below lists all the bands available in this manual. For details, please refer to the Model Charts section. Frequency Band Bandwidth Power Level UHF2 435–480 MHz 1W or 4W 136– 74 MHz 1W or 5W UHF1 403–447 MHz...

  • Page 17: Chapter 1 Model Charts And Test Specifications

    Chapter 1 Model Charts and Test Specifications Radio Model Information The model number and serial number are located on a label attached to the back of your radio. You can determine the RF output power, frequency band, protocols, and physical packages. The example below shows one portable radio model number and its specific characteristics.

  • Page 18: Model Chart For Uhf2, 435-480 Mhz

    Model Charts and Test Specifications: Model Chart for UHF2, 435–480 MHz Model Chart for UHF2, 435–480 MHz EP350, UHF2, 435–480 MHz Model Description LAH03RDK8AA9AN EP350 435 – 480M 4W 12.5/25K 99C Full Keypad LAH03RDH8AA7AN EP350 435 – 480M 4W 12.5/25K 99C Limited Keypad Item Description PMUE3148_ 435 –...

  • Page 19: Model Chart For Vhf, 136-174 Mhz

    Model Charts and Test Specifications: Model Chart for VHF, 136–174 MHz Model Chart for VHF, 136–174 MHz EP350, VHF, 136–174 MHz Model Description LAH03KEK8AA9AN EP350 136 – 174M 5W 12.5/25K 99C Full Keypad LAH03KEH8AA7AN EP350 136 – 174M 5W 12.5/25K 99C Limited Keypad Item Description PMUD2437_ 136 –...

  • Page 20: Model Chart For Uhf1, 403-447 Mhz

    Model Charts and Test Specifications: Model Chart for UHF1, 403–447 MHz Model Chart for UHF1, 403–447 MHz EP350, UHF1, 403–447 MHz Model Description LAH03QDK8AA9AN EP350 403 – 447M 4W 12.5/25K 99C Full Keypad LAH03QDH8AA7AN EP350 403 – 447M 4W 12.5/25K 99C Limited Keypad Item Description PMUE3320_ 403 –...

  • Page 21: Uhf2 Specifications

    Model Charts and Test Specifications: UHF2 Specifications UHF2 Specifications General Transmitter UHF2 UHF2 RF Output High Frequency: 435 – 480 MHz NiMH @ 7.5 V: Channel Capacity: 99 Channels Frequency: 435 – 480 MHz 7.5 Volts ±20% Power Supply: Channel Spacing: 12.5/25 kHz Dimensions: Freq.

  • Page 22: Vhf Specifications

    Model Charts and Test Specifications: VHF Specifications VHF Specifications General Transmitter RF Output High Frequency: 136 – 174 MHz NiMH @ 7.5 V: Channel Capacity: 99 Channels Frequency: 136 – 174 MHz 7.5 Volts ±20% Power Supply: Channel Spacing: 12.5/25 kHz Dimensions: Freq.

  • Page 23: Uhf1 Specifications

    Model Charts and Test Specifications: UHF1 Specifications UHF1 Specifications General Transmitter UHF1 UHF1 RF Output High Frequency: 403 – 447 MHz NiMH @ 7.5 V: Channel Capacity: 99 Channels Frequency: 403 – 447 MHz 7.5 Volts ±20% Power Supply: Channel Spacing: 12.5/25 kHz Dimensions: Freq.
  • Page 24 Model Charts and Test Specifications: UHF1 Specifications Notes...

  • Page 25: Chapter 2 Theory Of Operation

    Chapter 2 Theory Of Operation Introduction This chapter provides a basic theory of operation for the radio components. Major Assemblies • Main PCB – Contains the RF circuits which comprises receiver, transmitter, phase-locked loop (PLL) frequency synthesizer, micro controller, power supply, audio and digital circuits •...

  • Page 26: Rx Front End

    Theory Of Operation: Major Assemblies 2.2.1.1 RX Front End UHF1 : Receiver Front-end consists of a low pass filter, a pre-selector filter, a low noise RF Amplifier and a Post-selector filter. Incoming RF signal from the antenna is applied through the Harmonics Low Pass Filter (L409, L410, L411, C426, C427, C428, C429, C445, C446) and passes through the transmit/receive switch (CR301) and a varactor-tuned 2-pole pre-selector filter (L320, L324, C351, C361, CR314 and CR307) before routed to an RF amplifier (Q301).

  • Page 27: Rx Squelch

    Theory Of Operation: Major Assemblies UHF2 : RF signal from RX front-end is then directed to a Single Balanced Mixer (L329, L333, Q306, and Q307). 1st LO signal from VCO is filtered by an injection filter (L310, L331, C325, C326, C327) to remove harmonics.

  • Page 28: Transmitter

    Theory Of Operation: Major Assemblies 2.2.2 Transmitter The radio's TX Power Amplifier system is a three stage amplifier which is able to amplify the VCO output up to the permitted maximum transmit power levels (UHF: 4W, VHF: 5W). SWB+ BAT+ Power Control Current Detect CR401...

  • Page 29: Phase Lock Loop Synthesizer

    Theory Of Operation: Major Assemblies 2.2.3 Phase Lock Loop Synthesizer The Phase Lock Loop (PLL) synthesizer subsystem consists of the reference oscillator (VCTCXO), VCO, PLL IC, Charge pump and Loop filter. TX VCO Circuit To PA Driver FL701 TX Out Modulating Synthesizer Charge...

  • Page 30: Rx Audio Circuit

    Theory Of Operation: Major Assemblies 2.2.4 RX Audio Circuit The RX audio circuit consists of Audio Processor IC, Audio amp, speakers & Sub-tone system. Audio Processor IC (AK2347) RXA1 RX LPF TX/RX HPF Audio IN Scrambler / Expander (from IF IC) Descrambler emphasis pin 24...

  • Page 31: Tx Audio Circuit

    Theory Of Operation: Major Assemblies 2.2.5 TX Audio Circuit The TX audio circuit is comprised of microphones, LPF, Audio Processor IC, and TX Sub-tone system. 4 Order LPF (Fc=4KHz) (Audio IN) Audio Processor IC (AK2347) U501-C,D TX/RX HPF TXA1 Scrambler/ Com- Pre- Limiter...

  • Page 32: Microcontroller

    Theory Of Operation: Major Assemblies The output audio signal of Audio Processor IC is directed to volume control switch (SW/VOL1) controlled by user and is finally amplified by U601BTL Audio Amplifier to a sufficient level to drive either the external or internal speaker. 2.2.6 Microcontroller The microprocessor or CPU includes Microprocessor (U101), EEPROM and support components.

  • Page 33: Chapter 3 Test Equipment, Service Aids, And Service Tools

    Chapter 3 Test Equipment, Service Aids, and Service Tools Test Equipment Table 3-2. lists test equipment required to service the radios. Table 3-2. Recommended Test Equipment Motorola Part No. Description Characteristics Application R2600 series System analyzer This item will substitute...

  • Page 34: Service Aids

    Test Equipment, Service Aids, and Service Tools: Service Aids Service Aids Table 3-3. lists service aids recommended for working on the EP350 Series Radios. While all of these items are available from Motorola, most are standard shop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.

  • Page 35: Figure 3-1. Programming/Test Cable (Pmdn4077_R)

    Test Equipment, Service Aids, and Service Tools: Service Aids Programming/Test Cable 2.5mm stereo USB connection type Figure 3-1. Programming/Test Cable (PMDN4077_R) 2.5mm stereo 2.5mm stereo Figure 3-2. Cloning Cable (PMDN4076_R) VBUS VBUS TX_D To Computor RX_D 2.5mm stereo > 4, 5, 6 USB_CONNECTOR IC : CP2102 RX / TX data...
  • Page 36 Test Equipment, Service Aids, and Service Tools: Service Aids Notes...

  • Page 37: Chapter 4 Performance Checks

    Chapter 4 Performance Checks General These radios meet published specifications through their manufacturing process by utilizing high accuracy laboratory-quality test equipment. The recommended field service equipment is as accurate as the manufacturing equipment with few exceptions. This accuracy must be maintained in compliance with the manufacturer’s recommended calibration schedule.
  • Page 38 Performance Checks: LCD/LED/Button/Volume Knob Test Mode Table 4-4. Radio Operation in Test Mode (Continued) Button LCD Indication Backlight Tone SPB1 • ON when button is (Side pressed. Programmable • OFF after a short Button 1) period of inactivity (even if the button is continuously being pressed).
  • Page 39 Performance Checks: LCD/LED/Button/Volume Knob Test Mode Table 4-4. Radio Operation in Test Mode (Continued) Button LCD Indication Backlight Tone PTT Button Solid Amber • ON when button is (Push–To–Talk pressed. Button) • OFF following button released (After a short period of inactivity)
  • Page 40 Performance Checks: LCD/LED/Button/Volume Knob Test Mode Notes...

  • Page 41: Chapter 5 Radio Programming And Tuning

    Chapter 5 Radio Programming and Tuning Introduction This chapter provides an overview of the EP350 Series Customer Programming Software (CPS) and ® the CP/EP/P Tuner as designed for use in a Windows 2000/XP/Vista environment. Both cover all the functions of the traditional Radio Service Software (RSS) package.

  • Page 42: Radio Tuning Setup

    Program/Test Cable PMDN4077_R Note: 1. Use PMDN4040BR or higher for tuning the EP350 Series radios as PMDN4040AR cannot be used to perform this function. 2. Use PMDN4171_R for tuning the EP350 Series radios when using the service monitor R2600 series.

  • Page 43: Initial Test Equipment Control Settings

    Radio Programming and Tuning: Transmitter Alignment Options 5.4.1 Initial Test Equipment Control Settings The initial test equipment control settings are listed in Table 5-5. Table 5-5. Initial Equipment Control Settings Service Monitor Test Set Power Supply Monitor Mode: Power Monitor Impedance: 24 Voltage: 7.5 Vdc RF Attenuation:...

  • Page 44: Transmit Low Power Tuning

    Radio Programming and Tuning: Transmitter Alignment Options 3. Press PTT Toggle. This will key up the radio at the 1st test frequency (F1). 4. Read the Transmit Power from the Service Monitor. 5. Adjust the High Power Level as shown in Table 5-6 on page 3 by using either the Left/Right arrows on the slider or Up/Down arrows on the Working Softpot box.

  • Page 45: Transmit Modulation Tuning

    Radio Programming and Tuning: Transmitter Alignment Options Figure 5-8. Tx Low Power Window (Low Power) 5.5.3 Transmit Modulation Tuning There are 2 variations of Transmit Modulation Tuning, namely 12.5 kHz and 25 kHz. Table 5-7. Transmit Modulation Tuning Channel Spacing (kHz) Tuning Range (kHz) 12.5 2.25 ±...

  • Page 46: Transmit 12.5 Khz Modulation Tuning

    Radio Programming and Tuning: Transmitter Alignment Options AF An1 In: FM Demod vii. Filter 1: 50 Hz HPF viii. Filter 2: 15 kHz LPF De-Emphasis: 750us Detector: Pk+-Max AFGen1 Freq: 1.0000 kHz xii. AFGen1 Lvl: 100mV 2. Initial setup using the R2600 series RF Communications Test Set a.

  • Page 47: Transmit 25 Khz Modulation Tuning

    Radio Programming and Tuning: Transmitter Alignment Options 6. Go to the next frequency point by clicking on the next Working Softpot value and press PTT Toggle. 7. Repeat steps 3–5 for the remaining test frequencies (F2–F5). 8. Press Program to commit the softpot values into the codeplug. 9.

  • Page 48: Receiver Tuning

    Radio Programming and Tuning: Receiver Tuning Figure 5-10. Tx Modulation 25 kHz Window Receiver Tuning There are 4 variations of Receive Squelch Tuning: 12.5 kHz-Band Normal Squelch, 12.5 kHz-Band Tight Squelch, 25 kHz-Band Normal Squelch and 25 kHz-Band Tight Squelch. Table 5-8.

  • Page 49: Receive 12.5 Khz-Band Normal Squelch Tuning

    Radio Programming and Tuning: Receiver Tuning Filter 2: 15 kHz LPF Ext Load R: 24 Ω 2. Initial setup using the R2600 series RF Communications Test Set a. Connect “RF IN/OUT” port on R2600 series to RF adaptor on radio’s antenna port using a N- Type to BNC cable.

  • Page 50: Receive 12.5 Khz-Band Tight Squelch Tuning

    5-10 Radio Programming and Tuning: Receiver Tuning Figure 5-11. Rx 12.5 kHz-band Normal Squelch Tuning Window 5.6.3 Receive 12.5 kHz Band Tight Squelch Tuning 1. Under the Alignment menu, select Rx Squelch, then select Squelch 12.5 kHz-band Tight. (Figure 5-12. Rx 12.5 kHz-band Tight Squelch Tuning Window). 2.

  • Page 51: Receive 25 Khz-Band Normal Squelch Tuning

    Radio Programming and Tuning: Receiver Tuning 5-11 Figure 5-12. Rx 12.5 kHz-band Tight Squelch Tuning Window 5.6.4 Receive 25 kHz Band Normal Squelch Tuning 1. Under the Alignment menu, select Rx Squelch, then select Squelch 25 kHz-band Normal. (Figure 5-13. Rx 25 kHz-band Normal Squelch Tuning Window). 2.

  • Page 52: Receive 25 Khz-Band Tight Squelch Tuning

    5-12 Radio Programming and Tuning: Receiver Tuning Figure 5-13. Rx 25 kHz-band Normal Squelch Tuning Window 5.6.5 Receive 25 kHz Band Tight Squelch Tuning 1. Under the Alignment menu, select Rx Squelch, then select Squelch 25 kHz-band Tight. (Figure 5-14. Rx 25 kHz-band Tight Squelch Tuning Window). 2.

  • Page 53: Utilities

    Radio Programming and Tuning: Utilities 5-13 Figure 5-14. Rx 25 kHz-band Tight Squelch Tuning Window Utilities 5.7.1 Program Serial No. The Program Serial No. option under the Utilities heading allow the radio serial number to be programmed. However, the serial number of a particular radio can only be programmed if it was originally blank.

  • Page 54: Front Panel Programming

    In user configuration, a user will have a limited choice to program the radio. Note Some EP350 Series models do not have Dealer Configuration enabled. (EP350 Series radio with the following Regional Super Tanapa: PMUE3144_AL, PMUD2441_AL and PMUE3323_AL only have User Configuration enabled). Please use the CPS to program additional setting on the radio.

  • Page 55: Entering Programming Mode

    Radio Programming and Tuning: Front Panel Programming 5-15 5.8.2.1.2 From User to Dealer 1. Turn off the radio. 2. Press the Side Programmable Button 2 (bottom side programmable button) 5 times within 3 seconds after turning on the radio. 3. LCD will display the current front panel programming mode. 4.

  • Page 56: Editing Front Panel Programming Mode Parameters

    5-16 Radio Programming and Tuning: Front Panel Programming 5.8.6 Editing Front Panel Programming Mode Parameters Table 5-9. Front Panel Programming Mode Parameters 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu BCKLIGHT AUTO AUTO – Backlight Off if no keypress for more (Backlight) TOGGLE than 5 seconds.
  • Page 57 Radio Programming and Tuning: Front Panel Programming 5-17 Table 5-9. Front Panel Programming Mode Parameters (Continued) 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu PROG BTN SIDE 1S UNASSIGN (Unassigned) Program Side Button 1 – Short Press. (Programmable (Side Button 1 BCKLIGHT (Backlight) Button)
  • Page 58 5-18 Radio Programming and Tuning: Front Panel Programming Table 5-9. Front Panel Programming Mode Parameters (Continued) 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu FRONT 1L - same as above - Program Front Button 1 – Long Press. (Front Button 1 –...
  • Page 59 Radio Programming and Tuning: Front Panel Programming 5-19 Table 5-9. Front Panel Programming Mode Parameters (Continued) 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu 067.0 Non-standard private line (TPL) frequency. TPL 2 067.1 ... 67.0 Hz – 255.0 Hz with 0.1 Hz step. 254.9 255.0 067.0...
  • Page 60 5-20 Radio Programming and Tuning: Front Panel Programming Table 5-9. Front Panel Programming Mode Parameters (Continued) 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu PTTID TY NONE PTT ID type – None, Pre, Post or Both. (PTT ID Type) POST BOTH PTTID CH...
  • Page 61 Radio Programming and Tuning: Front Panel Programming 5-21 Table 5-9. Front Panel Programming Mode Parameters (Continued) 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu LIST 2 01-XXX _ _ _ Set Scan List 2 members. (Scan List 2) 02-XXX ...
  • Page 62 5-22 Radio Programming and Tuning: Front Panel Programming Table 5-9. Front Panel Programming Mode Parameters (Continued) 1st Level 2nd Level Main Menu Setting Remarks Sub-Menu Sub-Menu ACC CODE XXXXXXXX Access code for phone – XXXXXXXX. PHONE (Access Code) Use radio keypad to enter up to 16 characters consisting of 0,1,2,3,4,5,6,7,8,9,#,* DEACCCODE XXXXXXXX...

  • Page 63: Factory Reset

    Radio Programming and Tuning: Front Panel Programming 5-23 5.8.7 Factory Reset This feature allows you to erase certain programmable parameters and restore the radio to the factory default settings. The radio, upon reset, clears all memory channels, and restores the default settings of radio wide parameters.
  • Page 64 5-24 Radio Programming and Tuning: Front Panel Programming Notes...

  • Page 65: Chapter 6 Maintenance - Ep350 (Full Keypad Model)

    Chapter 6 Maintenance – EP350 (Full Keypad Model) Introduction This section provides details about the following: • Preventive maintenance (inspection and cleaning) • Safe handling of CMOS and LDMOS devices • Disassembly and reassembly of the radio • Repair procedures and techniques •...

  • Page 66: Safe Handling Of Cmos And Ldmos Devices

    Maintenance – EP350 (Full Keypad Model): Safe Handling of CMOS and LDMOS Devices Cleaning External Plastic Surfaces Apply the 0.5% detergent-water solution sparingly with a stiff, non-metallic, short-bristled brush to work all loose dirt away from the radio. Use a soft, absorbent, lintless cloth or tissue to remove the solution and dry the radio.

  • Page 67: Repair Procedures And Techniques - General

    When damaged parts are replaced, identical parts should be used. If the identical replacement part is not locally available, check the parts list for the proper Motorola part number. Orders for replacement parts which are listed in the “Parts List” section of this manual, should be placed directly on Motorola’s local distribution organization or via Motorola Online...
  • Page 68 Maintenance – EP350 (Full Keypad Model): Repair Procedures and Techniques – General • Avoid accidentally getting solder in the connector. • Be careful not to form solder bridges between the connector pins. • Examine your work closely for shorts due to solder bridges.
  • Page 69 Maintenance – EP350 (Full Keypad Model): Repair Procedures and Techniques – General Shields Removing and replacing shields is recommended to be done with the Air Blower, BOSCH GHG 603 or equivalent. • To remove the shield: Place the circuit board in the circuit board holder.

  • Page 70: Disassembling And Reassembling The Radio

    If a unit requires further testing or service than is customarily performed at the basic level, please send the unit to a Motorola Authorized Service Center listed in Appendix B. Note: Numbers in parentheses ( ) refer to item numbers in Table 6-13 on page 6-19.

  • Page 71: Radio Disassembly - Detailed

    Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 6.5.1 Radio Disassembly – Detailed 6.5.1.1 Front Housing From Chassis Disassembly 1. Turn off the radio. 2. Remove the Battery (29): Release the battery latch by moving it into the unlock position.

  • Page 72: Figure 6-19. Chassis Removal

    Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio Note: The Volume Knob can be turned clockwise and counterclockwise. However, it is designed to fit very tightly on the shaft. 5. Separate the Chassis (25) from the Front Housing Assembly (1): Insert the Chassis and Knob Opener in between the thin retaining wall and the chassis at the bottom of the radio.

  • Page 73: Figure 6-21. Speaker Wire Removal

    Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio Note: The speaker wire and flexible cable connector connecting the Front Housing Assembly (1) and the Chassis (25) prevent the two units from being completely separated Remove the speaker wire connector connecting the main circuit board and the internal speaker on the front housing with the tweezers.

  • Page 74: Chassis Assembly Disassembly

    6-10 Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 6.5.1.2 Chassis Assembly Disassembly 1. Remove the Accessory Bracket (33). 2. Remove the nut (16) on the On/Off Volume Knob Shaft with the Crab Eye Nut Opener. 3. Remove the screw holding the Sub Circuit Board (15) to the Chassis (25) with a Phillips screwdriver.

  • Page 75: Front Circuit Board, Display Module And Keypad Disassembly

    Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 6-11 Finger Strip Ring Battery Contact Seal Figure 6-24. Main Circuit Board, finger strips, O-ring and Battery Contact Seal Removal(UHF2) Finger Strip Ring Battery Contact Seal Figure 6-25. Main Circuit Board, finger strips, O-ring and Battery Contact Seal Removal(UHF1) 6.5.1.3 Front Circuit Board, Display Module and Keypad Disassembly...

  • Page 76: Speaker Disassembly

    6-12 Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 3. Remove the Front Circuit Board from the Front Housing. (Refer Figure 6-26). Circuit Board Figure 6-26. Front Circuit Board Removal 4. Remove the LCD (36) and Keypad (41) from the Front Housing. (Refer Figure 6-27).

  • Page 77: Radio Reassembly - Detailed

    Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 6-13 5. Remove the Speaker Felt (8) from the grille area (Refer Figure 6-28). Speaker Retainer Speaker Insulator Speaker Speaker Felt Figure 6-28. Speaker Removal 6.5.2 Radio Reassembly – Detailed 6.5.2.1 Speaker Reassembly...

  • Page 78: Front Circuit Board, Display Module And Keypad Reassembly

    6-14 Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 6.5.2.2 Front Circuit Board, Display Module and Keypad Reassembly 1. Place and align the LCD (36) onto the front housing. 2. Place and align the Keypad (41) onto the keypad slot. Apply force around the keypad and ensure the keypad sealing rib is perfectly seated onto the keypad slot.

  • Page 79: Chassis Assembly Reassembly

    Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio 6-15 6.5.2.3 Chassis Assembly Reassembly 1. Fit the Battery Contact Seal (26) onto the battery contact slot. 2. Align and assemble the finger strips for assembly. 3. Fit the main O-ring (22) onto the chassis as follow: Ensure that the main O-ring is not twisted.

  • Page 80: Figure 6-34. Sub Circuit Board And Accessory Bracket Reassembly

    6-16 Maintenance – EP350 (Full Keypad Model): Disassembling and Reassembling the Radio Figure 6-33. Main Circuit Board, finger strips, O-ring and Battery Contact Seal Reassembly(UHF1) 7. Insert the Sub Circuit Board Flexible Cable (14) into the respective connectors at the top of the main circuit board.

  • Page 81: Chassis And Front Housing Reassembly

    Maintenance – EP350 (Full Keypad Model): Torque List 6-17 6.5.2.4 Chassis and Front Housing Reassembly 1. Assembly the Chassis Assembly to the Front Housing Assembly (1) as follow: Lay the Chassis Assembly beside to the Front Housing Assembly. Insert the Flexible Cable (37) from the main circuit board into the connector on the front circuit board.

  • Page 82: Mechanical View And Parts List

    6-18 Maintenance – EP350 (Full Keypad Model): Mechanical View and Parts List Mechanical View and Parts List 6.7.1 EP350 (Full Keypad without Channel Knob) Exploded View and Parts List Figure 6-36. EP350 (Full Keypad without Channel Knob)Radio Exploded View...

  • Page 83: Table 6-13. Parts List (Full Keypad Without Channel Knob)

    Maintenance – EP350 (Full Keypad Model): Mechanical View and Parts List 6-19 Table 6-13. Parts List (Full Keypad without Channel Knob) Item Motorola Kit Number Description Quantity PMDN4087_R Front Housing, Full Keypad PMDN4086_R Name Plate (EP350) PMDN4124_R Double Molded Cover, PTT...
  • Page 84 6-20 Maintenance – EP350 (Full Keypad Model): Mechanical View and Parts List Table 6-13. Parts List (Full Keypad without Channel Knob) (Continued) Item Motorola Kit Number Description Quantity PMDN4107_R Screw, Machine PMDN4123_R Module, Liquid Crystal Display PMDN4109_R Flexible Cable, Main Circuit Board...

  • Page 85: Chapter 7 Maintenance - Ep350 (Limited Keypad Model)

    Chapter 7 Maintenance – EP350 (Limited Keypad Model) Introduction This section provides details about the following: • Preventive maintenance (inspection and cleaning) • Safe handling of CMOS and LDMOS devices • Disassembly and reassembly of the radio • Repair procedures and techniques •...

  • Page 86: Safe Handling Of Cmos And Ldmos Devices

    Maintenance – EP350 (Limited Keypad Model): Safe Handling of CMOS and LDMOS Devices Cleaning External Plastic Surfaces Apply the 0.5% detergent-water solution sparingly with a stiff, non-metallic, short-bristled brush to work all loose dirt away from the radio. Use a soft, absorbent, lintless cloth or tissue to remove the solution and dry the radio.

  • Page 87: Repair Procedures And Techniques - General

    Maintenance – EP350 (Limited Keypad Model): Repair Procedures and Techniques – General This radio contains static-sensitive devices. Do not open the radio unless you are properly grounded. Take the following precautions when working on this unit: • Store and transport all CMOS devices in conductive material so that all exposed leads are shorted together.

  • Page 88: Table 7-14. Lead Free Solder Wire Part Number List

    When damaged parts are replaced, identical parts should be used. If the identical replacement part is not locally available, check the parts list for the proper Motorola part number. Orders for replacement parts which are listed in the “Parts List” section of this manual, should be placed directly on Motorola’s local distribution organization or via Motorola Online...
  • Page 89 Maintenance – EP350 (Limited Keypad Model): Repair Procedures and Techniques – General Once solder wicks onto the new component, remove the heat from the solder. Heat the remaining pad with the soldering iron and apply solder until it wicks to the component.

  • Page 90: Disassembling And Reassembling The Radio

    If a unit requires further testing or service than is customarily performed at the basic level, please send the unit to a Motorola Authorized Service Center listed in Appendix B. Note: Numbers in parentheses ( ) refer to item numbers in Table 7-17 on page 7-19.

  • Page 91: Radio Disassembly - Detailed

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 7.5.1 Radio Disassembly – Detailed 7.5.1.1 Front Housing From Chassis Disassembly 1. Turn off the radio. 2. Remove the Battery (29): Release the battery latch by moving it into the unlock position.

  • Page 92: Figure 7-39. Knob Removal

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 4. Remove the Volume Knob (7) from its shaft using the Chassis and Knob Opener. (Refer Figure 7-39. Volume Knob Chassis and Knob Opener Figure 7-39. Knob Removal Note: The Volume Knob can be turned clockwise and counterclockwise. However, it is designed to fit very tightly on the shaft.

  • Page 93: Figure 7-41. Speaker Wire And Flexible Cable Connection

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio Slide the rear chassis downwards, and away from the front housing. Be careful not to damage the Flexible Cable (37) and speaker wire underneath. (Refer Figure 7-41). Speaker Wire Flexible Cable Figure 7-41.

  • Page 94: Chassis Assembly Disassembly

    7-10 Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio Push the latches on the Front Circuit Board (39) sideways to the right to release the flexible cable from the connector. (Refer Figure 7-43). Latches Figure 7-43. Unlatch the Flexible Cable 7.5.1.2 Chassis Assembly Disassembly...

  • Page 95: Figure 7-45. Main Circuit Board, Finger Strips, O-Ring And Battery Contact Seal Removal(Uhf2)

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 7-11 7. Remove the Main Circuit Board from the Chassis. Refer to the CMOS CAUTION paragraph under Section 7.3 before removing the main board. Be sure to use ESD protection when handling the circuit boards.

  • Page 96: Front Circuit Board, Display Module And Keypad Disassembly

    7-12 Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 7.5.1.3 Front Circuit Board, Display Module and Keypad Disassembly 1. Push the latches on the Front Circuit Board (39) to release the Liquid Crystal Display (LCD) flexible cable from the connector.

  • Page 97: Speaker Disassembly

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 7-13 7.5.1.4 Speaker Disassembly 1. Remove the screw holding the Speaker Retainer (10) to the Front Housing with a Phillips screwdriver. 2. Remove the Speaker Retainer from the Housing.

  • Page 98: Front Circuit Board, Display Module And Keypad Reassembly

    7-14 Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio Speaker Retainer Speaker Insulator Speaker Speaker Felt Figure 7-50. Speaker Reassembly 7.5.2.2 Front Circuit Board, Display Module and Keypad Reassembly 1. Place and align the LCD (36) onto the front housing.

  • Page 99: Chassis Assembly Reassembly

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 7-15 Circuit Board Figure 7-52. Front Circuit Board Reassembly 5. Insert the LCD flexible cable into the connector on the front circuit board. 6. Push the latches into the connectors.

  • Page 100: Figure 7-53. Main Circuit Board, O-Ring And Battery Contact Seal Reassembly(Uhf2)

    7-16 Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 5. Tighten the six screws holding the main circuit board with a Phillips screwdriver torque to (Refer Table 7-16 on page 7-18 for torque in other units). 6. Tighten the RF Support Screw (19) with a flat head screwdriver torque to (Refer Table 7-16 on page 7-18 for torque in other units).

  • Page 101: Chassis And Front Housing Reassembly

    Maintenance – EP350 (Limited Keypad Model): Disassembling and Reassembling the Radio 7-17 12. Align and Insert the Accessory Bracket (33) into the audio jack hole. (Refer Figure 7-55). Accessory Bracket Audio Jack Figure 7-55. Sub Circuit Board and Accessory Bracket Reassembly 7.5.2.4 Chassis and Front Housing Reassembly...

  • Page 102: Torque List

    Screw, Machine 0.23±0.01 2.04±0.13 2.35±0.15 PMDN4114_R Screw, RF Support 0.23±0.01 2.04±0.13 2.35±0.15 Mechanical View and Parts List 7.7.1 EP350 (Limited Keypad without Channel Knob) Exploded View and Parts List Figure 7-57. EP350 (Limited Keypad without Channel Knob) – Exploded View...

  • Page 103: Table 7-17. Parts List (Limited Keypad Without Channel Knob)

    Maintenance – EP350 (Limited Keypad Model): Mechanical View and Parts List 7-19 Table 7-17. Parts List (Limited Keypad without Channel Knob) Item Motorola Kit Number Description Quantity PMDN4097_R Front Housing, Limited Keypad PMDN4086_R Name Plate (EP350) PMDN4124_R Double Molded Cover, PTT...
  • Page 104 7-20 Maintenance – EP350 (Limited Keypad Model): Mechanical View and Parts List Table 7-17. Parts List (Limited Keypad without Channel Knob) (Continued) Item Motorola Kit Number Description Quantity PMDN4107_R Screw, Machine PMDN4123_R Module, Liquid Crystal Display PMDN4109_R Flexible Cable, Main Circuit Board...

  • Page 105: Chapter 8 Troubleshooting Tables

    Check the connection between source and destination between source and radios. destination radios failed. Make sure follow the correct cloning procedures. If message reoccurs, send radio to nearest Motorola Service Centre. TIME OUT Time Out Error – No Check the connection between source and destination communication between radios.

  • Page 106: Troubleshooting Table For Receiver

    Radio Dead; Display Does 1. Dead Battery Replace with charged battery. Not Turn On 2. On/Off Switch Send radio to nearest Motorola Service Centre. 3. Regulators 4. Regulator fault Radio Dead; Display Turns Transceiver Board Send radio to nearest Motorola Service Centre.

  • Page 107: Troubleshooting Table For Transmitter

    No RF Power Out 1. Tx Power Level or Check Tx power level and frequency programming (from Frequency tuner). 2. No Injection To Power Send radio to nearest Motorola Service Centre. Amplifier 3. Antenna Switch/ Connector No Modulation 1. Programming Check deviation and compensation settings using the tuner.
  • Page 108 Troubleshooting Tables: Troubleshooting Table for Transmitter Notes...

  • Page 109: Appendix A Accessories

    Appendix A Accessories Antennas HAD9338_R VHF Heliflex Antenna (136 – 162 MHz) NAD6502_R VHF Heliflex Antenna (146 – 174 Mhz) NAD6579_ VHF Whip Antenna (148 – 161 MHz) PMAD4012_ VHF Stubby Antenna, 9cm (136 – 155 MHz) PMAD4013_ VHF Stubby Antenna, 9cm (155 – 174 MHz) PMAD4014_ VHF Antenna, 14 cm (136 –...

  • Page 110: Belt Clip

    90 – 264 V, SMPS with NA/LA country plug EPNN9292_ 90 – 264 V, SMPS with Argentina country plug PMLN5228_ TriChem Single Unit Charger base Note: Certain accessories may not be available at the time of publication. For latest information on accessories, visit:http://www.motorola.com/governmentandenterprise.

  • Page 111: Appendix B Warranty, Service Support, And Replacement Parts

    Product Accessories (including Batteries and Chargers) One (1) Year Motorola, at its option, will at no charge either repair the Product (with new or reconditioned parts), replace it (with a new or reconditioned Product), or refund the purchase price of the Product during the warranty period provided it is returned in accordance with the terms of this warranty.

  • Page 112: How To Get Warranty Service

    Warranty service will be provided by Motorola through one of its authorized warranty service locations. If you first contact the company which sold you the Product, it can facilitate your obtaining warranty service. You can also open a Contact Us case on Motorola Online (www.motorola.com/businessonline).

  • Page 113: Patent And Software Provisions

    • that MOTOROLA will be notified promptly in writing by such purchaser of any notice of such claim • that MOTOROLA will have sole control of the defense of such suit and all negotiations for its settlement or compromise • should the Product or parts become, or in MOTOROLA's opinion be likely to become, the...

  • Page 114: Piece Parts

    To register for online access: • Have your Motorola Customer number available. • Please go to http://motorola.com/businessonline and click on “Sign Up Now.” • Complete form and submit it. • Contact your BDM to complete set-up and it will be done within 24 to 48 hours.

  • Page 115: Glossary Of Terms

    Micro Controller Unit MRTI Motorola Radio-Telephone Interconnect: a system that provides a repeater connection to the Public Switched Telephone Network (PSTN). The MRTI allows the radio to access the telephone network when the proper access code is received.
  • Page 116 Term Definition ® Private-Line tone squelch: a continuous sub-audible tone that is transmitted along with the carrier. Phase-Locked Loop: a circuit in which an oscillator is kept in phase with a reference, usually after passing through a frequency divider. Push-To-Talk: the switch located on the left side of the radio; when pressed, causes the radio to transmit.
  • Page 118 © 2009 Motorola Inc. All rights reserved. Motorola Technology Sdn Bhd (Co. No. 455657-H) Plot 2 Bayan Lepas Technoplex Industrial Park Mukim 12 S.W.D 11900 Penang, Malaysia Printed in Malaysia September 2009 *6878419A01* 6878419A01-B...

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