Ericsson LPE-200 - Manuals - manualsarea.com

Page 2 - Original issue

AE/LZB 119 1902 R1A 2 MANUAL REVISION HISTORY REVISION DATE REASON FOR CHANGE R1A DEC 1996 Original issue NOTICE! This manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc. NOTICE! Repairs to this equipment should be made only by an authorized service technician...

Page 3 - TABLE OF CONTENTS

AE/LZB 119 1902 R1A 3 SPECIFICATIONS...................................................................................................................................................................... 4 GENERAL ..........................................................................................

Page 4 - GENERAL

AE/LZB 119 1902 R1A 4 BASIC TROUBLESHOOTING ............................................................................................................................................ 19ERROR CODES INTRODUCTION ...........................................................................................

Page 5 - SPECIFICATIONS; RECEIVE

AE/LZB 119 1902 R1A 5 SPECIFICATIONS ∗∗ (Con't) RECEIVE Channel Spacing 12.5 kHz Sensitivity (12 dB SINAD) -118dBm Selectivity: -63 dB Intermodulation -67 dB Frequency Separation Full Bandwidth Audio Output 500 mW @ 3% Maximum Distortion TRANSMIT RF Power Output 0.5 - 3 Watts (Normal Trunked) Spurio...

Page 6 - DESCRIPTION; trunked or conventional communications; Keypad

AE/LZB 119 1902 R1A 6 DESCRIPTION The Ericsson Inc. LPE-200 Portable Radios are rugged, high-quality, high-performance FM two-waycommunications unit. It is available in either Scan orSystem versions. These are Ericsson’s smallest and mostsophisticated high-specification portable radios, designed tom...

Page 7 - MECHANICAL; The radios are packaged in a polycarbonate blend; OPTIONS AND ACCESSORIES; PART NUMBER; Batteries

AE/LZB 119 1902 R1A 7 MECHANICAL The radios are packaged in a polycarbonate blend exterior housing. A six-cell back mounted nickel cadmiumbattery pack provides a nominal 7.5 volts. Two differentnickel cadmium battery packs offering high and extendedcapacities are available for use with the portable ...

Page 8 - OPERATION; CONTROLS

AE/LZB 119 1902 R1A 8 OPERATION The LPE-200 series of portable radios is designed for EDACS and conventional mode operation. When the unit isused in a trunked EDACS, the digital control channel isautomatically monitored. When the user initiates a call, theunit sends a digital request through a contr...

Page 9 - KEYPAD SCAN/SYSTEM FUNCTIONS; Figure 2 - Scan Keypad; Key; SCN; key is used to select additional

AE/LZB 119 1902 R1A 9 KEYPAD SCAN/SYSTEM FUNCTIONS Figure 2 - Scan Keypad Figure 3 - System Keypad Key Function ▲ ▼ Primary Function: Allows user to selecteither system, groups, or channels, dependingon personality programming. The buttons actas STEP UP or STEP DOWN. Pressing oneof these buttons dis...

Page 10 - CIRCUIT ANALYSIS; SOFTWARE

AE/LZB 119 1902 R1A 10 CIRCUIT ANALYSIS The portable radio is unique in the generation of the transmit carrier. The transmit section has an offsetfrequency loop operating at 115.2 MHz. This means thesynthesizer is operating at a frequency that is notharmonically related to the output frequency. The ...

Page 11 - Rx Back End; The Receiver Signal Strength Indicator (RSSI) circuitry

AE/LZB 119 1902 R1A 11 Local Oscillator Buffer (V450) The injection frequency (1011.2-1016.2 MHz) from the synthesizer circuit is applied to the base of Local Oscillator(LO) NPN buffer transistor V450 through capacitor C450and inductor L450. This signal at the input of V450 is 0dBM and is amplified ...

Page 13 - The main VCO, in the synthesizer circuit, is; Transmit Offset; When the transmitter is keyed, transistor V152 conducts; Single Side Band Mixer; The main VCO frequency is amplified then passed; Low Pass Filters; There are two modulating inputs from HILLARY, one; Figure 4 - Frequency Generation

AE/LZB 119 1902 R1A 13 TRANSMITTER Transmit Frequency Generation The main VCO, in the synthesizer circuit, is programmed to generate the 1st LO receive injectionfrequency (1011.2 to 1016.2 MHz). This carrier frequencyis mixed with a transmit offset frequency of 115.2 MHz togenerate the carrier and t...

Page 14 - When transmitting, the collector voltage for transistor; SAW Transmit Band Pass Filter 2; The output of the MMIC Buffer amplifier is fed to the; Figure 5 - Power Amplifier; RF Input; Figure 6 - Directional Coupler; The power sensor circuit consist of part of W100,

AE/LZB 119 1902 R1A 14 (MODQ and MODQ_B). The I input passes through a lowpass filter consisting of capacitors C191, C192 and C193,resistor R166 and inductors L156 and L157. The output ofthis filter connects to N150, Pins 43 (I) and 42 (I_bar). TheQ input passes through a low pass filter consisting ...

Page 15 - A regulated 5.5 Vdc is applied to power control buffer; Transmit Modulation; The microphone input is through capacitor C300 and; SYNTHESIZER; There are two synthesizers in the synthesizer circuit.; ) causing N201 to switch in the; Main Voltage Controlled Oscillator (U200)

AE/LZB 119 1902 R1A 15 divider consisting of resistors R116 and R117. The outputof the divider circuit connects to power control bufferamplifier N102-B, Pin 5 (+IN). The output of N102-Bdrives Pin 1 of the power amplifier. Power Control Buffer (N102-B) A regulated 5.5 Vdc is applied to power control...

Page 16 - DC POWER DISTRIBUTION

AE/LZB 119 1902 R1A 16 the voltage divider consisting of resistors R202 and R204and can be metered at test point TP202. The level of thissignal is typically 25 mV RMS. This feedback signalconnects through coupling capacitor C207 to N203, Pin 5(INM1). The voltage level at this point is typically 4.5 ...

Page 18 - LCD NEGATIVE BIAS GENERATOR; SERVICE; EQUIPMENT REQUIRED; Equipment Description; PROGRAMMING

AE/LZB 119 1902 R1A 18 LCD NEGATIVE BIAS GENERATOR A 96 kHz, 5V p-p square wave from HILLARY D701- 57 is rectified and inverted to a negative supply voltage byC922, V909 and C923. This negative voltage is controlledto the LCD by V910 to vary the display contrast.Thermistor R604 is monitored via the ...

Page 19 - Figure 7 - Programming And Test Equipment Setup

AE/LZB 119 1902 R1A 19 Flash Programming The “FLASH” software is the current version of the LPE-200 radio operating software. When changes andenhancements are made to the operating code, the newoperating code can be “FLASHED” to the radio, upgradingthe operating code without any hardware changes to ...

Page 20 - Table 1 - General Troubleshooting; Symptom; Receiver inoperative or weak.; or

AE/LZB 119 1902 R1A 20 Table 1 - General Troubleshooting Symptom Possible Cause/Action Required Completely Inoperative (nodisplay or audio on power up) Power Supply Problem?1. Check battery voltage with a voltmeter.2. Charge battery or replace battery.3. Check to be sure battery contacts are not bro...

Page 21 - Figure 8 - Transmit Path - Test Points and Levels

AE/LZB 119 1902 R1A 21 Figure 8 - Transmit Path - Test Points and Levels

Page 22 - message; xxxx; Fatal Errors

AE/LZB 119 1902 R1A 22 ERROR CODES INTRODUCTION This section lists all the radio errors and warnings. The radio displays errors and warnings to the user to indicate problems that have occurred. Radio errors can occur at any time from power up to power down. Each error code in the listincludes an exp...

Page 24 - Operational Software Fatal System Errors; Error Name

AE/LZB 119 1902 R1A 24 FATAL_LCD_NOACK HARDWARE 40 LCD did not ack message. FATAL_LCD_HARD_FAIL HARDWARE 41 LCD hardware is invalid. FATAL_SCI_NOHEAP HARDWARE 50 Serial communication interface out of heap (RAMmemory) space. FATAL_DSP_NOACK HARDWARE 60 DSP did not ack message. FATAL_DSP_FIFOOVR HARDW...

Page 25 - Operational Software Non-Fatal System Errors

AE/LZB 119 1902 R1A 25 PI_MALLOC_ERROR SOFTWARE 503 Could not allocate memory to store crucialpersonality data. UI_FATAL_DEVICE_ERROR PERSDATA 600 Input/output device error. UI_FATAL_SWTO_MALLOC_ERROR SOFTWARE 601 Software memory error. UI_FATAL_SWTO_MAX_ERROR SOFTWARE 602 Software error, power cycl...

Page 26 - Radio Programming Errors

AE/LZB 119 1902 R1A 26 Error Name Message Code Description PIFEAT_SNR_ERROR FEAT ERR 550 Feature encryption - Cannot read radio ROM serialnumber. PIFEAT_READ_ERROR FEAT ERR 551 Personality feature encryption read failure or data notavailable. PIFEAT_CRC_ERROR FEAT ERR 552 decryption failure. Persona...

Page 28 - DISASSEMBLY PROCEDURE

AE/LZB 119 1902 R1A 28 DISASSEMBLY PROCEDURE To disassemble the LPE-200 radio: Figure 9 1. Remove the battery pack by pushing the battery release button and sliding the battery pack straight back until itstops, then lift the battery pack out. When replacing thebattery pack align the ribs on the side...

Page 29 - Using a flat blade screwdriver, push on the battery; Figure 13 - Push Battery Contacts; Carefully unplug the small flex at the top of the radio; Figure 14 - Board/Shield Separated From Metal Frame; Remove the board from the shield by prying up on a; Figure 15 - Separating Board From Shield; To remove the switch assembly use a small flat blade; Figure 16 - Removing the Switch Assembly; NOTE

AE/LZB 119 1902 R1A 29 Figure 13 10. Using a flat blade screwdriver, push on the battery contacts. Be careful not to damage the gasket.Applying pressure on the battery contacts will slowlyseparate the main circuit board and shield from themetal frame. Figure 13 - Push Battery Contacts Figure 14 11. ...

Page 30 - PA Module Replacement

AE/LZB 119 1902 R1A 30 Figure 17 14. Pry up on the hook to release from the latch and push down on the switches to remove the assembly from thehousing. Figure 17 - Removing Switch Assembly (Pry up on the latch) Figure 18 15. To remove the Antenna Switch Assembly the switch assembly must be removed f...

Page 31 - ASSEMBLY DIAGRAM AND PARTS LIST

ASSEMBLY DIAGRAM AND PARTS LIST SYMBOL PART NUMBER DESCRIPTION 1 SXK 107 3807/2 Front Assembly(LPE-200 Scan) 1 SXK 107 3808/2 Front Assembly(LPE-200 System) 2 SXK 107 3815 Rear Assembly(896 - 940 MHz TX) MARRIAGE HARDWARE KIT 3 SXA 120 4145 Main Gasket 4 SBA 124 025/0080 Screw (2) 6 SXA 120 4118 Was...

Page 34 - Rear Assembly

ASSEMBLY DIAGRAM AND PARTS LIST Radio Rear Assembly (151 88-SXK 107 3815, Rev. ) SYMBOL PART NUMBER DESCRIPTION 1 SXK 107 3816 Rear Housing Casting 2 SXA 120 4110 Rear Cosmetic Cover 3 RNT 403 351/01 Antenna Switch Assembly 3A RNT 403 351/901 Gasket 3B RNT 403 351/900 Nut 4 SXA 120 4133 Switch Retai...

Page 35 - 00 MHz Main Board Assembly

ASSEMBLY DIAGRAM AND PARTS LIST 900 MHz Main Circuit Board Assembly (151 88-ROA 117 2297, Rev. ) SYMBOL PART NUMBER DESCRIPTION 2 SXA 120 4167 Ground Pad N101 RYT 901 6118/2 PA Module U201 RTL 204 614/03 Reference Oscillator X101 RPT 403 303/01 Battery Connector Z400 RTN 202 728/03 Filter Z401 RTN 2...

Page 36 - FRONT SIDE

OUTLINE DIAGRAM 900 MHz Circuit Board (1078-ROA 117 2297 Uen, Sheet 1, Rev. B) FRONT SIDE AE/LZB 119 1902 R1A 36

Page 37 - BACK SIDE

OUTLINE DIAGRAM 900 MHz Circuit Board (1078-ROA 117 2297 Uen, Sheet 2, Rev. B) BACK SIDE AE/LZB 119 1902 R1A 37

Page 47 - SCHEMATIC DIAGRAM

SCHEMATIC DIAGRAM TX/RX Audio (1911-ROA 117 2297, Sheet 10, Rev. B) AE/LZB 119 1902 R1A 47