Motorola Portable Radio Ep450 Basic Hkln4215a Manual
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December 3, 2003HKLN4215A 5-12Radio Alignment Procedures: Receiver Tuning 5.5.2 Squelch Tuning 5.5.2.1 Manual Squelch Tuning Perform the squelch tuning procedure as follows: 1.Under the Rx Align menu, select Squelch Attenuation. Select Squelch Attenuation 12.5 kHz or Squelch Attenuation 25 kHz Channel Spacing variations (Figure 5-10). 2.Apply an RF signal modulated with a 1 kHz tone at 60% rated deviation listed in Table 5-5 for cur- rent frequency point (F1 being the first) of 10 dB SINAD. That is, adjust the reference signal level until 10 dB SINAD is obtained at the SINAD meter. Squelch tuning can either be done manually (see Manual Squelch Tuning for procedure) or by Auto Squelch (see Manual Squelch Tuning for pro- cedure). To obtain 10 dB, unmute the radio first by dragging the corresponding slider value to 1. Note:1. Squelch tuning can only be accomplished after reference oscillator warping. 2. When using the test box RLN4460, the received audio output is taken from the AC/ DC METER OUT terminals with the METER OUT rotary switch set to RX. It is recom- mended that Rated Volume Tuning be performed so the correct 10 dB SINAD level can be obtained. 3. This tuning method is performed for multiple squelch tuning channels and multiple channel spacings. Figure 5-10. Squelch Tuning Window Table 5-5. Squelch Deviation Values Channel Spacing Rated System Deviation Signal Generator Deviation 25 kHz5.0 kHz3.0 kHz 12.5 kHz 2.5 kHz 1.5 kHz 20 kHz4.0 kHz2.4 kHz
HKLN4215ADecember 3, 2003 Radio Alignment Procedures: Receiver Tuning 5-13 3.Set softpot to its maximum value to mute the radio. 4.Adjust the softpot value by using the slider, keying in the edit box or using the spin controls. Press ENTER to confirm the selection or use the spin controls. Do this until the radio is totally unmuted. Verify the squelch closing by inputting a signal level of 4 dB lower than that of the 10 dB SINAD level. 5.Repeat Steps 2 through 4 of Manual Squelch Tuning, for frequency points F2-F7. 6.Press Program to commit the softpot values into the radio. 7.Exit the Squelch Tuning function. 5.5.2.2 Auto Tune When you press the Auto Tune button, the radio automatically returns an optimum squelch value. After you press the button, the radio may need time to produce an optimal setting for the squelch attenuation. The following steps describe the auto tune process: 1.Select current frequency point (F1 being the first), then press Auto Tune. 2.Repeat Steps 3-4 of the Manual Squelch Tuning section for frequency points F2-F7. 5.5.3 RSSI System Level Tuning 1.Under the Rx Align menu, select RSSI Tuning (Figure 5-11). 2.Inject an on channel signal to the radio at -47 dBm at the frequency listed. Modulate the signal with a 1 kHz tone at 60% deviation (3 kHz) to verify that the radio is receiving the desired fre- quency. RSSI tuning is only done at 25 kHz channel spacing. 3.Change the level to the defined dBm level in the softpot box. (-115 dBm or -105 dBm). 4.Press the Update button for the soft spot to be tuned to the RSSI value correlating to the applied level. The programmed RSSI value will be displayed. Note: Proceed with caution since this procedure automatically programs the softpot value into your radio. Note: Auto Tune will automatically update your radio’s codeplug. Please be careful when using it. Figure 5-11. RSSI Tuning
December 3, 2003HKLN4215A 5-14Radio Alignment Procedures: Utilities 5.Adjust the input level to reflect the next soft spot value. Repeat steps 3 and 4 to tune the next value. 5.5.4 RSSI Display Tuning 1.Under the Rx Align menu, select RSSI Display Tuning. 2.Inject an on channel signal to the radio at -47 dBm at the frequency listed. Modulated the signal with a 1 kHz tone at 60% deviation (3 kHz) to verify the radio is receiving the desired frequency. RSSI tuning is only done at 25 kHz channel spacing. 3.Change the level to that which is needed to produce 12 SINAD (approximately -119 dBm). 4.Press the Update button for the soft spot to be tuned to the RSSI value correlating to the applied level. The programmed RSSI value will be displayed. 5.Adjust the input level to -90 dBm. 6.Press the Update button for the soft spot to be tuned to the RSSI value correlating to the applied level. The programmed RSSI value will be displayed. 5.6 Utilities 5.6.1 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. If the serial number of the radio was not blank, then access to the screen will be denied. 5.7 Radio-to-Radio Cloning 1.Cloning is the process of copying the content of one radio (source radio) into another radio (desti- nation radio). Radio content refers to system-type features such as frequency, squelch type options, trunking, etc. Radio functionality inherent in one radio cannot be cloned to another radio that does not contain the same functionality. Tuning and alignment information are not transferable and are not affected by cloning. 1.Signaling Identification Numbers (IDs) are duplicated in the cloning process. Unique IDs may be assigned with the CPS. Note: The source radio’s serial number cannot be blank. Note: Unsuccessful cloning attempts generates a continuous tone and may be an indication that the destination radio’s codeplug is corrupted.
HKLN4215ADecember 3, 2003 Radio Alignment Procedures: Radio-to-Radio Cloning 5-15 Procedure: 1.Turn source and target radios off. 2.Connect cloning cable (AAPMKN4003) to the side connector of both radios. 3.Turn on the destination radio. 4.Press and hold the two side buttons at the same time on the source radio and then power up the source radio (Figure 5-12). Both radios produce a “clone-entry” tone. 5.Release both side buttons, 1 and 2. 6.When cloning is completed, the source radio produce’s a “clone-exit” tone and both the source and destination radios reset. 7.Turn both radios off. 8.Disconnect the cloning cable from both radios and turn them on for normal operation. Figure 5-12. Side Button Locations P1 P2 123 456 789 *0 # Side Button 1 Side Button 2
December 3, 2003HKLN4215A Notes: 5-16Radio Alignment Procedures: Radio-to-Radio Cloning
Chapter 6 Display Model Disassembly and Re-assembly 6.1 Introduction This section provides details about the following: Preventive maintenance (inspection and cleaning) Safe handling of CMOS and LDMOS devices Disassembly and re-assembly of the radio Repair procedures and techniques 6.2 Preventive Maintenance The radios do not require a scheduled preventive maintenance program; however, yearly verification of technical parameters and periodic visual inspection and cleaning is recommended. 6.2.1 Inspection Check that the external surfaces of the radio are clean, and that all external controls and switches are functional. It is not recommended to inspect the interior electronic circuitry. 6.2.2 Cleaning Procedures The following procedures describe the recommended cleaning agents and the methods to be used when cleaning the external and internal surfaces of the radio. External surfaces include the front cover, housing assembly and battery case. These surfaces should be cleaned whenever a periodic visual inspection reveals the presence of smudges, grease, and/or grime. The only recommended agent for cleaning the external radio surfaces is a 0.5% solution of a mild dishwashing detergent in water. The only factory recommended liquid for cleaning the printed circuit boards and their components is isopropyl alcohol (70% by volume). 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. Make sure that no water remains entrapped near the connectors, cracks, or crevices.Note: Internal surfaces should be cleaned only when the radio is disassembled for service or repair. CAUTION: The effects of certain chemicals and their vapors can have harmful results on certain plas- tics. Avoid using aerosol sprays, tuner cleaners, and other chemicals. !
December 3, 2003HKLN4215A 6-2Display Model Disassembly and Re-assembly: Safe Handling of CMOS and LDMOS Devices Cleaning Internal Circuit Boards and Components Isopropyl alcohol (70%) may be applied with a stiff, non-metallic, short-bristled brush to dislodge embedded or caked materials located in hard-to-reach areas. The brush stroke should direct the dislodged material out and away from the inside of the radio. Make sure that controls or tunable components are not soaked with alcohol. Do not use high-pressure air to hasten the drying process since this could cause the liquid to collect in unwanted places. After completing the cleaning process, use a soft, absorbent, lintless cloth to dry the area. Do not brush or apply any isopropyl alcohol to the frame, front cover, or back cover. 6.3 Safe Handling of CMOS and LDMOS Devices Complementary metal-oxide semiconductor (CMOS) devices are used in this family of radios, and are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, resulting in failures occurring weeks or months later. Therefore, special precautions must be taken to prevent device damage during disassembly, troubleshooting, and repair. Handling precautions are mandatory for CMOS circuits and are especially important in low humidity conditions. DO NOT attempt to disassemble the radio without first referring to the following CAUTION statement. Note: Always use a fresh supply of alcohol and a clean container to prevent contamination by dissolved material (from previous usage). CAUTION: 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. Do not insert CMOS devices into conventional plastic “snow” trays used for storage and transportation of other semiconductor devices. Ground the working surface of the service bench to protect the CMOS device. We recommend using the Motorola Static Protection Assembly (part number 0180386A82), which includes a wrist strap, two ground cords, a table mat, and a floor mat. Wear a conductive wrist strap in series with a 100k resistor to ground. (Replacement wrist straps that connect to the bench top covering are Motorola part number RSX- 4015.) Do not wear nylon clothing while handling CMOS devices. Do not insert or remove CMOS devices with power applied. Check all power supplies used for testing CMOS devices to be certain that there are no voltage transients present. When straightening CMOS pins, provide ground straps for the apparatus used. When soldering, use a grounded soldering iron. If at all possible, handle CMOS devices by the package and not by the leads. Prior to touching the unit, touch an electrical ground to remove any static charge that you may have accumulated. The package and substrate may be electrically common. If so, the reaction of a discharge to the case would cause the same damage as touching the leads.!
HKLN4215ADecember 3, 2003 Display Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 6-3 6.4 Disassembling and Re-assembling the Radio — General Since these radios may be disassembled and re-assembled with the use of only four (board to casting) screws, it is important to pay particular attention to the snaps and tabs, and how parts align with each other. The following tools are required for disassembling the radio (see 3.2 for a list of service aids): Knob remover/chassis opener Penknife-size screwdriver TORX™ T6 screwdriver Scribe If a unit requires more complete testing or service than is customarily performed at the basic level, send this unit to a Motorola Authorized Service Center. See Appendix B for a list of authorized service centers. The following disassembly procedures should be performed only if necessary: Chassis Disassembly Speaker Disassembly PTT Disassembly 6.4.1 Radio Disassembly — Detailed 6.4.1.1 Front Cover From Chassis Disassembly 1.Turn off the radio. 2.Remove the battery (Figure 6-1): a. Slide the battery latch into the unlock position. Disengage by pushing downward and holding the latch towards the front of the radio. b. With the battery latch disengaged, slide the battery down from the top of the radio about 1/2 in. Once the battery is free from the battery rails, lift it directly away from the radio. c. Remove the battery from the radio. Figure 6-1. Battery Removal Battery Latch Lock Unlock
December 3, 2003HKLN4215A 6-4Display Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 3.Remove the antenna. 4.Pry off the volume and channel selector knobs from their shafts using the knob removal/chassis opener tool (Motorola part # 6686533Z01). (Figure 6-2.) 5.Separate the chassis from the front housing assembly by using the knob remover/chassis opener too. Place the broad side of the opener into the slots located at the base of the radio (Figure 6-3). Press the handle on the opener downwards. This pressing action forces the thin inner plastic wall toward the base of the radio, releasing the two chassis base tabs.. 6.Pull the chassis assembly out of the front cover only until the volume and channel selectors shaft just clear the top of the case. (Figure 6-4). Figure 6-2. Antenna and Knob Removal Note: Both knobs slide on and off. However the knobs are designed to fit very tightly on the shaft. Figure 6-3. Chassis Removal CAUTION: Marring the front cover O-ring sealing area will prevent the radio from sealing properly. If the O-ring is damaged, replace it with a new one. Radio Chassis Knob Remover/ Chassis Opener !
HKLN4215ADecember 3, 2003 Display Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 6-5 7.Rotate the bottom of the chassis up about 20° to disconnect the keyboard flex cable connector. Push down 2 end tabs to release flex connector at the bottom of the chassis. 8.Rotate the chassis counterclockwise out of the housing and position next to the housing. Take care not to damage the speaker and microphone wires that are still connected to the chassis (Figure 6-5). 9.Unplug the speaker wire assembly from the 2-pin connector on the chassis. 10.Unplug the microphone wire assembly from the socket on the chassis. 11.Move the chassis away from the housing and place on a clean work surface. Note: The speaker wire assembly microphone wire assembly and keypad flex cable connector connecting the front housing assembly and the chassis prevent the two units from being completely separated Figure 6-4. Keyboard Flex Connection Figure 6-5. Microphone and Speaker Connections Radio Chassis Flex Connector Speaker Connector Microphone Connector