Ericsson EDACS Monogram Series Maintenance Manual Download | Manualshive

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AE/LZB 119 1647 R1A

35

IC’S

U101

U102

U103

U104

U105

PIN #

SQ.

UNSQ

RX

TX

RX

TX

TX

RX

TX

1

4.43

4.43

0

0

0

3.60

3.48

0

0

2

3.73

3.73

0

0

0

6.32

2.08

0

0

3

3.57

3.57

0

0

7.5

6.51

2.08

0

0

4

4.48

4.48

0

1.57

7.5

6.51

0

7.95

7.75

5

3.50

3.50

0

0

0

0

0

0

0

6

3.50

3.50

0

0

-

-

.19

13.19

12.16

7

3.50

3.50

0

0

-

-

.43

-

-

8

4.50

4.50

-

-

-

-

6.88

-

-

9

1.74

1.92

-

-

-

-

-

-

-

10

0

0

-

-

-

-

-

-

-

11

4.35

4.35

-

-

-

-

-

-

-

12

0

0

-

-

-

-

-

-

-

13

0

0

-

-

-

-

-

-

-

14

0

0

-

-

-

-

-

-

-

15

0

0

-

-

-

-

-

-

-

16

1.76

1.76

-

-

-

-

-

-

-

U106

U108

U109

U110

PIN #

RX

RX

RX

TX

RX

TX

1

0

3.98

0

0

3.35

6.02

2

4.9

4.04

0

0

0

0

3

7.95

4.07

0

0

0

0

4

7.95

3.24

4.98

4.12

5.01

0

5

7.95

0

0

0

0

0

6

2.45

7.69

7.74

7.68

7.74

6.68

7

0

0

-

-

-

-

8

4.42

7.69

-

-

-

-

9

4.86

0

-

-

-

-

10

0

7.69

-

-

-

-

11

2.69

0

-

-

-

-

12

4.91

7.69

-

-

-

-

13

3.59

0

-

-

-

-

14

4.91

7.69

-

-

-

-

15

0

-

-

-

-

-

16

4.91

-

-

-

-

-

17

4.86

-

-

-

-

-

18

0

-

-

-

-

-

19

4.86

-

-

-

-

-

20

2.30

-

-

-

-

-

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Summary of Contents for EDACS Monogram Series

Page 1: ...ericssonz ericssonz Maintenance Manual MONOGRAM SERIES EDACS Trunking Portable 800 MHz ...

Page 2: ...his device is copyrighted by Ericsson Inc Unpublished rights are reserved under the copyright laws of the United States This manual is published by Ericsson Inc without any warranty Improvements and changes to this manual necessitated by typographical errors inaccuracies of current information or improvements to programs and or equipment may be made by Ericsson Inc at any time and without notice S...

Page 3: ... Keypad Lock 11 Power Up System Group 11 Manual Individual Calls 11 Manual Interconnect 11 Store 11 Recall Last Number Send 11 EDACS ONLY FEATURES 11 Group Scan 11 Automatic Login 11 System Group Selections 11 Conventional Failsoft 11 SCAT 11 Base Mobile Operation 11 Priority System Scan Optional 11 Emergency Optional 12 Wide Area Scan Optional 12 Dynamic Regrouping Optional 12 GE MARC ONLY FEATUR...

Page 4: ...GES 17 KEYPAD LOCK 18 RF BOARD THEORY OF OPERATION 650 020 0002 18 DESCRIPTION 18 CIRCUIT ANALYSIS 18 RECEIVER SECTION 18 RF Amplifier and 1st Mixer 18 1st IF Filter and Amplifier 18 2nd Mixer and Detector 19 TRANSMITTER SECTION 19 Synthesizer Switching and Buffering 19 Power Module and Antenna Switching Module 19 Forward Power Detector and APC 19 PLL CIRCUIT DESCRIPTION 19 VCO and Buffer Amplifie...

Page 5: ...Clock Circuitry 23 SERIAL NUMBER ROM U706 23 AUDIO SIGNAL PROCESSOR U804 24 Receive Audio Paths 24 EDACS Conventional RX Audio Modes 24 High Speed Data Limiter 24 Low Speed Tone Data Decoding 24 GE MARC Mode RX Audio 24 GE MARC Tone Decoding 25 Receive Noise Squelch 25 Receive Alert Tones 25 Transmit Audio Paths 26 High Speed Data Encoding 26 GE MARC Busy Tone Encoding 26 DTMF Tone Encoding 27 5 V...

Page 6: ...REMOVAL AND REPLACEMENT 29 To remove the microphone and speaker 29 KEYPAD BOARD REMOVAL AND REPLACEMENT 29 To remove the Keypad Board 29 RF BOARD REMOVAL AND REPLACEMENT 29 To remove RF board 29 PTT Switch Assembly Removal and Replacement 30 TROUBLESHOOTING 30 VOLTAGE CHART 34 BATTERY CHARGING AND CARE 37 FOR BEST PERFORMANCE 37 PARTS LIST 38 COMPONENT PINOUT 45 SYSTEM WIRING DIAGRAM 47 KEYPAD DIS...

Page 7: ...PC IBM or IBM compatible TRANSMITTER Frequency Range MHz 806 824 851 869 Talk Around Frequency Separation MHz No Degradation 18 RF Power Watts 2 10 Modulation Limiting kHz 5 max FM Hum And Noise dB 40 companion Rx Conducted Spurious dB 65 30 dbm Frequency Stability PPM 1 5 Channel Spacing kHz 25 12 5 NPSPAC Audio Response EIA Audio Distortion 5 RECEIVER Frequency Range MHz 851 869 Frequency Separa...

Page 8: ... 1 2 High Temperature 501 1 1 501 2 1 2 Low Temperature 502 1 1 502 2 2 Temperature Shock 503 1 1 503 2 1 Solar Radiation 505 1 1 505 2 2 Humidity 507 1 2 507 2 2 Blowing Dust 510 1 1 510 2 1 Vibration 514 2 8 10 514 3 1 Shock 516 2 1 2 5 516 3 1 4 REGULATORY DATA Frequency Range MHz 806 870 FCC Type Acceptance F3JETP4800 RF Output 2 Watts FCC Rules 22 90 DOC Type Number 287 195 105A ...

Page 9: ...le on a per channel basis and prevents unnecessary channel traffic and radio damage if the transmit timer is exceeded If the programmed timer times out during a transmission the radio will beep and stop transmitting The beeping tone will continue until the operator releases the PTT button Audio Alert Beeps The radio generates a number of alert tones to indicate various events Low Battery Alert Whe...

Page 10: ...ENT CODE 023 340 766 251 236 704 742 632 123 657 025 261 227 567 565 307 362 026 566 263 213 736 654 163 460 607 031 374 643 265 171 426 662 363 436 443 444 032 271 427 510 762 664 344 471 715 043 355 306 147 303 761 703 150 256 047 375 707 311 330 456 561 712 136 502 051 520 771 315 321 673 723 235 611 671 054 405 675 331 372 507 731 447 473 474 744 065 301 343 324 570 732 164 207 071 603 717 746...

Page 11: ...cessed Special Call number EDACS ONLY FEATURES Group Scan The radio monitors the control channel and responds to all group channel assignments associated with the scan list The Priority group is dictated by the group currently selected If a call occurs on the Priority group while monitoring one of the scan groups the radio will immediately enter into the Priority group Automatic Login The radio au...

Page 12: ...eceive channel request data from the mobiles and portables When a radio is first turned on it scans the available list of frequencies programmed in the personality EEPROM for a control channel When a control channel is found the radio locks on to the frequency and monitors the data for a channel assignment incoming call When receiving a channel assignment incoming call the monitoring radio immedia...

Page 13: ...ame tones so that any unit can talk to all other units in the same group A block diagram of the GE MARC is shown in Figure 2 When originating a call the radio identifies an idle repeater channel and interrogates it with a single burst of busy tone the repeater keys its transmitter and sends a burst of acquisition tone back to the radio unit When the interrogating radio detects the acquisition tone...

Page 14: ...low frequency tone is heard for one second If valid the radio will scan the call originate frequencies for brief intervals until it finds one with no busy tone on it If no channel is free the radio if programmed for this option will activate the Call Retry state and display RETRYNG in the display Retrying will cause the radio to revert to the Idle mode and scan for an incoming call while trying to...

Page 15: ...ate busy tone The busy tone modulates radio and repeater transmitters at a low level of 1 kHz deviation continuously This tone is filtered out of the received audio and is used to hold the communication channel active It also excludes other radios from using the channel when a call is active Acquisition Tone A 1962 9 Hz tone sent at full deviation for 50 milliseconds from the repeater is used as a...

Page 16: ...ACE Operating controls are located on the radio top and front panel and microphone The front panel LCD provides radio status and communication control information to the operator The keypad is used for manual number entry for individual calls access to a telephone interconnect system and activation of various EDACS GE MARC and conventional features Turning The Radio ON OFF The radio is turned on b...

Page 17: ... or an invalid dispatch overdial call was attempted SYSTEM TONES A low frequency tone is sounded for one second after attempting to place a trunked call and BUSY is displayed This indicates that the GE MARC system is busy If the Call Retry option has been enabled through programming the radio retries at 5 second intervals up to 15 times unless END is pressed a channel is acquired or an out of rang...

Page 18: ...ed suppression of spurious received signals such as first and second IF images Two 4 pole Gaussian filters in the second IF for improved data recovery RF Amplifier and 1st Mixer The received signal from the antenna is passed through the antenna switching module U102 to the receiver circuitry when 0 Vdc is applied to U102 pin 4 This signal is then applied to F101 This bandpass filter prevents undes...

Page 19: ...ts in a constant RF output power over power supply voltage range and temperature variances The preset DAC value is set for an RF output level of approximately 1 5 watts at the time of manufacture PLL CIRCUIT DESCRIPTION VCO and Buffer Amplifier The VCO generates frequencies of 806 824 MHz in normal RX and TX trunking modes and 851 869 MHz in talk around mode The VCO is a major block of the phase l...

Page 20: ... impact on reference sideband levels The saturation capacitor C154 is responsible for keeping transient voltages on PDOUT within linear operating range of the charge pump and for additional sideband suppression The final section R128 and C128 is used for extra sideband filtering without affecting the transient response of the filter Lock Detector When the synthesizer is locked the output at U106 p...

Page 21: ...U701 pin 17 transitions form low to high a new 16 bit data stream is read to U701 pin 16 Three keys SPC CALL CH UP and CH DWN are tied directly to micro controller U701 on pins 46 48 and 49 respectively A low level signal at these pins indicate that key has been pressed LCD display control is through U701 pins 5 and 6 to drive JP1 pins 9 and 10 I C CLK and I C DATA These lines also control reading...

Page 22: ...7 and J108 pin 6 respectively lines With 12 Vdc applied to the 7 5 Vdc line transistors Q801 and Q802 turn on The collector of Q802 applies 12 Vdc to the VPP input of U703 and voltage divider R726 and R727 The voltage divider pulls EA VPP input at U701 pin 56 high 5 volts to enable the flash programming mode The micro controller uses the A15 ENBL line U701 pin 36 during flash programming to isolat...

Page 23: ...the 5Vdc regulated supply from U801 falls out of regulation This active high reset pulse is inverted by Q703 and applied to the active low reset inputs of the micro controller U701 pin 30 and the ASP U804 pin 9 A watchdog timer inside the modem must be serviced by the micro controller at least every two seconds or a 50 microsecond wide reset pulse will be sent to the micro controller and the ASP T...

Page 24: ...dds hysteresis to this stage The output of the limiter stage U804 pin 21 is inverted by Q602 and the serial data is applied to the modem for serial to parallel conversion It is also connected to the micro controller U701 pin 7 This pin is normally at a high impedance but is switched low during transmit to clamp limited noise out of the modems receive data input Transistor Q601 on the RX AUDIO line...

Page 25: ...feeds pin 50 which is the input to the squelch high pass filter 7 5 KHz In the ASP the high pass filtered audio is rectified and sent out on U804 pin 52 The rectified noise is filtered by C612 and C611 if Q604 is on to provide an average dc level proportional to receiver noise level This dc level is applied to a non inverting dc buffer amplifier at U804 pin 55 The output of the amp is on U804 pin ...

Page 26: ...tches low during transmit to clamp the line to ground CG Tones And Low Speed Data Encoding Micro controller U701 generates the low frequency Channel Guard tones and low speed data using its WB1 and WB2 Walsh bit outputs These two bits are also used to generate GE MARC signaling tones as described in the following section entitled GE MARC SIGNALING TONE ENCODING The 2 bit low frequency Walsh bits a...

Page 27: ...et circuitry DISPLAY BOARD THEORY OF OPERATION 650 170 0001 DESCRIPTION Display board 650 170 0001 contains circuitry used to control external speaker mic switching and L C D backlighting The Display Board mounts on top of the Digital Board Connectors on the board interconnect the Display Board to the Digital Board The Display Board contains the following major items Liquid Crystal Display Module ...

Page 28: ... CLK and IIC DATA lines The DTMF tones at the output U106 pin 5 are sent to the receivers audio path in the ASP U804 pin 29 to provide DTMF side tones They are also sent to the TX audio path via U804 pin 73 MICROPHONE AND SPEAKER The microphone mounts directly into the front panel The microphone receives acoustic power through a hole in the front panel The speaker mounted to the front panel connec...

Page 29: ...e the speaker and microphone reverse the procedures above KEYPAD BOARD REMOVAL AND REPLACEMENT To remove the Keypad Board 1 Remove the RF shield and Digital Printed Circuit Board 2 Using a Phillips head screwdriver No 1 remove the six 6 screws holding the Keypad Board to front panel assembly Note the location of two 2 brackets shield 3 Lift Keypad Board from front panel assembly To replace the Key...

Page 30: ...rame assembly 2 Gently hold PTT harness and connector and lift from RF board connection 3 Using a Phillips screwdriver No 1 remove the 2 screws which hold PTT assembly to frame 4 Remove PTT assembly To replace PTT assembly reverse the procedures above TROUBLESHOOTING Before troubleshooting be sure to read and fully understand the Theory of Operation for the various boards Also check the following ...

Page 31: ...l If either channel works the VCO may need adjusted Re adjust TC301 If neither channel works do not readjust TC301 2 Check for 8Vdc on pin 5 of U106 If it is not there problem is in converter 3 Check TCXO oscillation frequency for 12 8 MHz 4 Check for VCO power at VCO output terminal 5 Be sure RF and digital boards are seated tightly together When transmitting in talk around SYN LOC is displayed o...

Page 32: ...s off 1 Check frequency by transmitting 2 Re align for proper distortion measurement 3 Check that frequency is 45 755 MHz 100 Hz Adjust TC101 Will not receive an EDACS or channel guarded call 1 Clock oscillator X701 is defective 2 High speed data limiter is defective Q602 R603 etc 3 Low speed data limiter is defective C610 R618 etc 4 Defective Modem IC 5 Defective CPU 6 Defective ASP 1 Oscillator ...

Page 33: ...d by using Maint2 program 4 Check for ASP data throughput For example data input is pin 80 output is pin 60 5 Look for TX data on U702 pin 25 If data is not present replace modem or entire digital board 6 Lood for data on appropriate pin 14 for Walsh bit 1 27 for busy tone etc If not present replace CPU or entire digital board No data or voice modulation 1 Defective modulation amplifier U301A R310...

Page 34: ...01 2 61 4 59 4 01 2 61 4 59 Q103 69 4 97 105 69 4 97 105 Q104 719 1 99 0 719 1 99 0 Q105 73 2 31 0 73 2 31 0 Q106 1 93 4 48 1 34 2 22 4 48 1 61 Q107 4 93 T A 4 93 4 93 T A 0 598 T A 4 86 Q108 2 63 4 34 1 99 2 63 4 34 1 99 2 63 3 95 1 99 Q109 744 4 52 0 744 4 52 0 744 4 52 0 Q110 1 49 5 60 71 Q111 4 35 0 0 4 35 0 0 0 2 07 0 Q112 7 25 0 7 25 7 25 0 7 25 7 25 6 65 6 55 Q113 0 7 25 0 0 7 25 0 4 69 0 0...

Page 35: ... 0 6 3 50 3 50 0 0 19 13 19 12 16 7 3 50 3 50 0 0 43 8 4 50 4 50 6 88 9 1 74 1 92 10 0 0 11 4 35 4 35 12 0 0 13 0 0 14 0 0 15 0 0 16 1 76 1 76 U106 U108 U109 U110 PIN RX RX RX TX RX TX 1 0 3 98 0 0 3 35 6 02 2 4 9 4 04 0 0 0 0 3 7 95 4 07 0 0 0 0 4 7 95 3 24 4 98 4 12 5 01 0 5 7 95 0 0 0 0 0 6 2 45 7 69 7 74 7 68 7 74 6 68 7 0 0 8 4 42 7 69 9 4 86 0 10 0 7 69 11 2 69 0 12 4 91 7 69 13 3 59 0 14 4 ...

Page 36: ... Bias 2 5Vdc 53 Squelch DC Amp 2 5 Vdc Full Quieting 3 5 Vdc Noise 55 Squelch DC Amp 2 5 Vdc Full Quieting 3 0 Vdc Noise 58 TX CG Tone 2 4Vp p 60 Deviation Control Output 30 mV p p Limited Mic 68 TX GEMARC Tones 1 6Vp p 73 TX DTMF Tones 10mVp p 74 TX Mic Audio 17 mVrms for 3kHz Deviation 1kHz Tone 76 Alert Tone Generator 1 7Vp p The following voltage measurements were taken with the radio supply v...

Page 37: ... charged on the radio ensure that the power switch on the radio is in the off position before charging Failing to turn the power switch to off during the charge cycle will result in a less than full charge condition which will noticeably reduce the operating time between charges Normal battery operation time is 8 hours This may vary depending upon how much the receiver audio is present and how muc...

Page 38: ... 3 579545M 18P X101 SOCKET ROUND GDRS 06S 2 5 P5 HEADER PIN GDRS 10D M2 5 P1 I C PCD3312CT PSY 12018 312TZ U106 100 MCR10EZH101J CHIP RES R122 127 100K MCR10EZH104J CHIP RES R101 119 121 10K MCR10EZH103J CHIP RES R128 3 3M MCR10EZH335J CHIP RES R123 2K MCR10EZH202J CHIP RES R126 330K MCR10EZH334J CHIP RES R120 124 47K MCR10EZH473J CHIP RES R125 CHIP TANTALUM 47uF 293D476X0010E2T16V C108 CHIP CERAM...

Page 39: ...IP RESISTOR 330K 1 16W 5 T 1608 R622 CHIP RESISTOR 4 7K 1 16W 5 T 1608 R19 775 CHIP RESISTOR 47K 1 16W 5 T 1608 R307 310 320 321 501 613 635 771 772 774 776 801 802 R808 816 827 888 CHIP RESISTOR 560 1 16W 5 T 1608 R15 17 503 505 701 702 703 704 705 706 7 07 711 712 713 R714 715 716 717 719 720 740 744 745 74 6 747 748 753 R749 750 751 770 779 CHIP RESISTOR 6 8K 1 16W 5 T 1608 R728 CHIP RESISTOR 6...

Page 40: ...STOR BC848C SOT 23 Q602 604 701 703 704 711 714 TRANSISTOR BC858B SOT 23 Q601 603 802 804 TRANSISTOR MMBT3904LT1 Q702 801 I C OP AMP KIA358F U301 601 I C NOTCH FILTER LMF90CCWM U602 I C SERIAL NO ROM DS2401Y SOT 23 U706 220 528 9 I C 64K SRAM GM76C88ALFW 15 U707 I C MC14066BDR2 SO 14 U604 I C LM386 M1 SO 8 U603 I C LP2951ACM SO 8 U801 I C N83C51GB U701 I C AUDIO SIGNAL PROCESSOR U804 E28F001B T120...

Page 41: ... 16V 20 8X9 C190 223 439 7 I C 806 870 MHZ MHW803 2 U103 R7 DIODE 1N4001 1A 50V D106 LED LAMP SPR 39MVW3 RED D104 FILTER GIGA DFC3R860P02BHD F101 102 FILTER CERAMIC SFGM455C F106 FILTER CERAMIC SFGM455E F105 FILTER CRYSTAL 45 3MHZ F103 104 CRYSTAL 45 755 MHZ X101 FUSE 125V 4A SLOW USE P N 280 089 7 FOR P P FU101 COIL AXIAL 2 2uH LAL03TB2R2M L102 COIL 455KHZ DETECTOR L105 600 nH 45 MHZ L101 103 HEA...

Page 42: ... 146 151 160 162 168 C169 174 180 0 01uF GRM40X7R103K 50V PT CERAMIC CH C108 112 120 147 165 167 100PF GRM40COG101J 50V PT CERAMIC CH C106 127 170 175 176 177 5PF GRM40COG0R5C50V PT CERAMIC CH C109 1PF GRM40COG010C 50V PT CERAMIC CH C103 130 134 10pF GRM40COG100C 50V PT CERAMIC CH C140 15PF GRM40COG150J 50V PT CERAMIC CH C116 1 5PF GRM40COG1R5C 50V PT CERAMIC CH C142 18pF GRM40COG180J 50V PT CERAM...

Page 43: ... PLL MC145190 U106 I C MC3371DR2 U101 I C MC145158DW2 SOG16 U107 REGULATOR IC TK11480MTR U105 MC14106BD U108 DIODE CHIP KDS196S D102 DIODE CHIP 1SS268 D101 KDS226 D105 KDS193 D103 1uH L104 0 OHM CHIP RESISTOR T 1206 R170 22uH 380NB 22M 32CS L107 L109 3T L106 10KA RV101 200KA RV103 DIP TRIMMER 6pF TSW3P180 TC101 VALUE KXN1274A VCTCXO 650 030 0001 VCO BD SHIELD PLATE VCO SPTE T0 3 BOTTOM COVER PIN C...

Page 44: ...221J 50V PT CERAMIC CH C302 311 3PF GRH708COG030C 50V PT CERAMIC CH C309 4 7PF GRM40COG4R7C 50V PT CERAMIC CH C305 5PF GRM40COG050C 50V PT CERAMIC CH C314 5 6PF GRM40COG5R6C 50VPT CERAMIC CH C308 4 7UF 293D475X0010B2T10V TANTALUM C312 313 TRANSISTOR BC848C SOT 23 Q304 TRANSISTOR KRC104SND Q301 TRANSISTOR MRF5711LT1 Q302 TRANSISTOR MMBR951 SOT 23 Q303 DIODE CHIP 1SS268 D301 DIODE CHIP MMBV809L CR30...

Page 45: ...AE LZB 119 1647 R1A 45 COMPONENT PINOUT 780 202 0009 Sh 1 Rev A ...

Page 46: ...AE LZB119 1647 R1A 46 COMPONENT PINOUT 780 202 0009 Sh 2 Rev A ...

Page 47: ...AE LZB 119 1647 R1A 47 SYSTEM WIRING DIAGRAM 930 010 0002 Rev A ...

Page 48: ...AE LZB119 1647 R1A SERVICE OUTLINE 48 KEYPAD DISPLAY BOARD 930 010 0002 Rev A ...

Page 49: ...SCHEMATIC DIAGRAM AE LZB 119 1647 R1A 49 PTT SWITCH BOARD 650 180 0001 S1800001 Rev A ...

Page 50: ...AE LZB119 1647 R1A SCHEMATIC DIAGRAM 50 KEYPAD DISPLAY BOARD 650 170 0001 S1700001 Rev A ...

Page 51: ...RF BOARD 650 020 0002 770 020 0002 Rev D AE LZB 119 1647 R1A 51 ...

Page 52: ...DIGITAL BOARD 650 010 0003 770 010 0003 Sh 1 Rev E AE LZB 119 1647 R1A 52 ...

Page 53: ...DIGITAL BOARD 650 010 0003 770 010 0003 Sh 2 Rev E AE LZB 119 1647 R1A 53 ...

Page 54: ...BLOCK DIAGRAM 060 010 0001 Rev B AE LZB 119 1647 R1A 54 ...

Page 55: ...This page intentionally left blank AE LZB 119 1647 R1A 55 ...

Page 56: ...ericssonz Ericsson Inc Private Radio Systems Mountain View Road Lynchburg Virginia AE LZB 119 1647 R1A 1 800 528 7711 Outside USA 804 528 7711 Printed in U S A ...

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