Viking 242-2009-632 Figure 10-19 TRANSMIT VCO SCHEMATIC

SCHEMATICS AND COMPONENT LAYOUTS

10-14

March 1999

Part No. 001-2009-600

Figure 10-19 TRANSMIT VCO SCHEMATIC

1300

+12V

OSCILLATOR

+12V

10 27pF

3.6k

.039uH

27pF

5.1k

6.2k

.039uH

CAPACITIVE

MULTIPLIER

MOD IN

TO RESONATOR TAP

CONTROL IN

C805 C806

R804

L804

CR802

C804

C803

CR801

C802

R801 C807

R802

C809

Q801

L803

C810

C811

R803

R805

R806 C812

C813

Q802

L805

R807

27pF

C808

2TRANSMIT VCO ONLY.

C805 .1uF

.47uF

C804

C806 1uF

C812

C813

DESIG RX TX

NOTES:

R804 4.7k 12k

3636

R814

10k

1. RESISTORS ARE IN OHMS AND CAPACITORS

IN MICROFARADS UNLESS OTHERWISE SPECIFIED.

4.7uF

2.2pF

3.9pF 3.3pF

5.6pF 4.7pF

WO 801

WO 804

WO 807

WO 808

WO 805

WO 802

WO 803

.3pF

180

RF OUT WO 806

100

2.7pF

C803 1.1pF

L805 .039uH .022uH

1pF

C814 2

27pF

Contents

Main SERVICE MANUAL Page VIKING VX 900 MHz LTR-Net REPEATER PART NO. 242-2009-632/634 Page 1 INTRODUCTION AND OPERATION 1 INSTALLATION 3 SOFTWARE 4 LTR-Net PROGRAMMER 5 REPEATER PROGRAMMING 6 CIRCUIT DESCRIPTION Page Page 7 ALIGNMENT AND TEST PROCEDURES 8 SERVICING 9 PARTS LIST 10 SCHEMATICS AND COMPONENT LAYOUTS A 900 MHz CHANNEL FREQUENCY CHART LIST OF FIGURES Page LIST OF TABLES Page SECTION 1 INTRODUCTION AND OPERATION Page Page Page Page Table 1-2 ACTIVE REPEATER ALARMS Page Page Page Page Page Page SPECIFICATIONS Page SECTION 2 INSTALLATION Page CAUTION Page Page 23 CRYSTAL SELECTION 1 J5 HSDB CODE SELECTION J4 1 Page Page A010 IN SPLITTER SHELF Figure 2-13 ATTENUATOR SETTINGS 2-9 March 1999 36 dB ATTENUATION 19 dB ATTENUATION MPC SWITCHES/JUMPERS Figure 2-16 THREE OR MORE REPEATERS INSTALLATION +12V 1.25 MHz SERIES 2000 OCXO DRAWER (023-2000-925) OUTPUTS MIDDLE REPEATERS Figure 2-17 MORE THAN ONE RACK OF LTR-Net REPEATERS 2-12 ALL MIDDLE REPEATERS SECTION 3 SOFTWARE Page Page SOFTWARE Figure 3-4 PROGRAMMING FLOWCHART 3-4 FILE EDIT HARDWARE UTILITIES TRANSFER SECTION 4 LTR-Net PROGRAMMER Page Page Figure 4-9 REPEATER CONFIGURATION Table 4-3 GENERAL PARAMETERS HARDWARE Page Page Page Page Page SECTION 4 LTR-Net PROGRAMMER Page Page Figure 4-9 REPEATER CONFIGURATION Table 4-3 GENERAL PARAMETERS HARDWARE Page Page Page Page Page SECTION 5 REPEATER PROGRAMMING SECTION 6 CIRCUIT DESCRIPTION Figure 6-1 RECEIVER BLOCK DIAGRAM 6-2 Page Page Page Page Page Page Page Page Page Page Figure 6-5 OCXO DRAWER BLOCK DIAGRAM 6-13 March 1999 FRONT PANEL BACK PANEL Page Page Page Page Page Page Page Page Page Page Figure 6-10 RF INTERFACE BOARD BLOCK DIAGRAM 6-25 March 1999 WARN ING Figure 6-11 POWER SUPPLY BLOCK DIAGRAM 6-27 March 1999 Page Page Page Page Page 6-33 March 1999 J2 ALARMS J1 Figure 6-14 ALARM EXTERNAL CONNECTOR BOARD ALARM INALARM OUT Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page SECTION 7 ALIGNMENT AND TEST PROCEDURES Page WARNING Page Page Page WARNING 7-8 A8 Figure 7-4 160W POWER AMPLIFIER ALIGNMENT POINTS Figure 7-5 RF INTERFACE BOARD ALIGNMENT POINTS Figure 7-6 POWER EXTENDER CABLES Figure 7-7 REPEATER TO CIM TEST SETUP SWITCH (RNT) REPEATER Figure 7-8 160W PA TEST SETUP 50 OHM DUMMY LOAD 7-10 POWER METER 40 dB THRULINE ATTENUATOR COMMUNICATIONS Figure 7-9 RECEIVER TEST SETUP RFIB 7-11 March 1999 COMMUNICATIONS SERVICE MONITOR Figure 7-10 EXCITER TEST SETUP Figure 7-11 75W POWER AMPLIFIER TEST SETUP HP 436A 40 dB THRULINE ATTENUATOR Page Page Page Page Page Page Page Page Page Page Page Figure 7-25 BATTERY CHARGER TEST SETUP 7-25 March 1999 Figure 7-26 SWITCH (RNT) BACKPLANE WIREHARNESS 7-26 W1 Figure 7-27 SWITCH (RNT) PUNCH BLOCK 7-27 March 1999 Figure 7-28 MAC ALIGNMENT POINTS J105 7-28 J103 J100 R100 P1 Figure 7-29 MAIN PROCESSOR CARD ALIGNMENT POINTS 7-29 March 1999 Figure 7-30 INTERFACE ALARM CARD ALIGNMENT POINTS 7-30 SECTION 8 SERVICING Page Page SERVICING 8-4 Figure 8-3 POWER SUPPLY REAR VIEW Figure 8-4 POWER SUPPLY FRONT VIEW Page Figure 8-5 3-DIGIT RESISTOR Table 8-1 CHIP INDUCTOR IDENTIFICATION Table 8-2 CERAMIC CHIP CAP IDENTIFICATION Page Page SECTION 9 PARTS LIST Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page U501 18W RF power module 544-4001-079 Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page SECTION 10 SCHEMATICS AND COMPONENT LAYOUTS TRANSISTORS INTEGRATED CIRCUITS Page Page BACKPLANE A6 J2 J3 J1 P2-P4-P6-P8 REAR CONNECTOR BOARD A10 INPUT/OUTPUT ALARM INTERFACE FIGURE 10-8 RF INTERFACE FIGURE 10-9 Part No. 001-2009-600 Part No. 001-2009-60010-5 BACKPLANE INTERCONNECT FIGURE 10-10 RF INTERFACE BOARD COMPONENT LAYOUT FIGURE 10-11 U107 U101 U102 U103 RF INTERFACE BOARD SCHEMATIC FIGURE 10-12 Q101 U110B U110F U103 L209 R281 R264 A006 C203 CH201 Page Figure 10-15 RECEIVE VCO SCHEMATIC OSCILLATOR 10-10 CAPACITIVE MULTIPLIER Q801 FIGURE 10-16 J402 R425 CH400 U403 U401 Page Figure 10-19 TRANSMIT VCO SCHEMATIC OSCILLATOR 10-14 CAPACITIVE MULTIPLIER Q801 FIGURE 10-20 75W POWER AMPLIFIER COMPONENT LAYOUT FIGURE 10-21 10-16 WO513 R508 C568 R509 Q501 WO508 WO510 WO516 Q503 FIGURE 10-22 R730 160W POWER AMPLIFIER COMPONENT LAYOUT FIGURE 10-23 10-18 Q704 U501 FIGURE10-24 R685 10-21 FORWARD/REVERSE POWER SCHEMATIC FIGURE10-26 U651B U651A U652A U652B OCXO COMPONENT LAYOUT FIGURE 10-27 C928 OCXO 2 OCXO 1 ALARM RELAYS REMOTE CONTROL INPUTS U914 FIGURE10-28 Page 10-25 160W POWER AMPLIFIER SCHEMATIC FIGURE10-30 U101 U102 U2 C27 U31 U5 S2 U24 U23 U30 FIGURE10-32 MAIN PROCESSOR CARD SCHEMATIC (2 OF 2) FIGURE 10-33 10-28 10-29 MAIN AUDIO CARD COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW) FIGURE10-34 U115 U158 U101 U154 U104 J104 MAIN AUDIO CARD COMPONENT LAYOUT (COMPONENT SIDE VIEW) FIGURE 10-35 10-30 J101 J102 J105 FIGURE10-36 MAIN AUDIO CARD SCHMEATIC (2 OF 3) FIGURE 10-37 10-32 U110 U109 10-33 MAIN AUDIO CARD SCHEMATIC (3 OF 3) FIGURE10-38 C504 C508 K500 + C532 FIGURE10-40 P500 P501 Page Page BACKPLANE SCHEMATIC FIGURE 10-43 P1 RF INTERFACE CONNECTOR J2 J1 800W POWER SUPPLY COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE VIEW) FIGURE10-44 R167 R168 U113 U108 L104 L102 C142 L103 F102 FIGURE10-46 800W POWER SUPPLY SCHEMATIC (2 OF 2) FIGURE 10-47 10-42 POWER SUPPLY FILTER BOARD COMPONENT LAYOUT FIGURE 10-48 POWER SUPPLY FILTER BOARD SCHEMATIC FIGURE 10-49 S101 Q105 BATTERY BACK-UP COMPONENT LAYOUT FIGURE 10-50 EP103 R140 CHARGER SECTIONREVERT SECTION Part No. 001-2009-600 POWER HARNESS 147 369 8 52 Figure 10-54 POWER CABLE CONNECTOR AND SCHEMATIC 10-47 March 1999 POWER HARNESS 147 369 Figure 10-55 COMPANDOR SCHEMATIC Figure 10-56 COMPANDOR COMPONENT LAYOUT U101 APPENDIX A 900 MHz CHANNEL FREQUENCY CHART