TW7000MS
vii
Table 4-14. 5 MHz IF Board Parts List (001-00800 Rev. AA) . . . . . . . . . . . . . . . . . . . 4-85
4.9
Audio Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-95
Table 4-15. Audio Board Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-96
Figure 4-25. Audio Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-99
Figure 4-26. Audio Board Component Locations (738211 Rev. G) . . . . . . . . . . . . . . . 4-100
Figure 4-27. Audio Board Schematic Diagram (994157 Rev. I) . . . . . . . . . . . . . . . . . 4-101
Table 4-16. Audio Board Parts List (001-00600 Rev. U) . . . . . . . . . . . . . . . . . . . . . . 4-103
4.10
Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-110
Figure 4-28. Front Panel Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-112
Table 4-17. Front Panel Interconnections to Motherboard . . . . . . . . . . . . . . . . . . . . . 4-113
Table 4-18. Front Panel Interconnections to Display . . . . . . . . . . . . . . . . . . . . . . . . . 4-114
Table 4-19. Front Panel Interconnection to Switch Board. . . . . . . . . . . . . . . . . . . . . . 4-115
Table 4-20. Front Panel Interconnection to Power/Volume Control . . . . . . . . . . . . . . 4-115
Table 4-21. Front Panel Interconnections to Clarifier . . . . . . . . . . . . . . . . . . . . . . . . . 4-116
Table 4-22. Front Panel Interconnection to Microphone. . . . . . . . . . . . . . . . . . . . . . . 4-116
Figure 4-29. Front Panel Assembly Component Locations (738207 Rev. J) . . . . . . . . 4-118
Figure 4-30. Front Panel Assembly Schematic Diagram (994130 Rev. R) . . . . . . . . . 4-119
Table 4-23. Front Panel Assembly Parts List (001-00143 Rev. P) . . . . . . . . . . . . . . . 4-121
Figure 4-31. Switch Board Component Locations (738195 Rev. B) . . . . . . . . . . . . . . 4-128
Figure 4-32. Front Panel Switch Board Schematic Diagram (994149 Rev. A) . . . . . . 4-129
Table 4-24. Switch Board Parts List (001-00110 Rev. A1). . . . . . . . . . . . . . . . . . . . . 4-131
4.11
Processor Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-132
Figure 4-33. RX Audio Distribution Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4-138
Figure 4-34. TX Audio Distribution Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4-138
Table 4-25. Enable Line Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-139
Table 4-26. Parallel Printer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-140
Table 4-27. Processor Board Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-141
Figure 4-35. Main Processor Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-146
Figure 4-36. Processor Board Component Locations (738562 Rev. A) . . . . . . . . . . . . 4-147
Figure 4-37. Processor Board Schematic Diagram 1 of 4 (994510 Rev. A). . . . . . . . . 4-149
Figure 4-38. Processor Board Schematic Diagram 2 of 4 (994510 Rev. A). . . . . . . . . 4-151
Figure 4-39. Processor Board Schematic Diagram 3 of 4 (994510 Rev. A). . . . . . . . . 4-153
Figure 4-40. Processor Board Schematic Diagram 4 of 4 (994510 Rev. A). . . . . . . . . 4-155
Table 4-28. Processor Board Parts List (001-01101 Rev. C). . . . . . . . . . . . . . . . . . . . 4-157
Chapter 5: Maintenance
5.1
Subassembly Breakdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2
Internal Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.3
Board Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Figure 5-1. Board Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Figure 5-2. Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Figure 5-3. Front Panel Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Figure 5-4. Rear Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Table 5-1.
Subassemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5.4
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.5
Basic Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.6
Detailed Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Table 5-2.
Detailed Performance Test Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
5.7
Subassembly Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Summary of Contents for TW7000MS
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Page 56: ...Figure 4 3 Power Supply Board Schematic Diagram 994158 Rev M 4 7 TW7000MS ...
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