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TM 11-6625-3145-14
Maintenance: Troubleshooting-318/338 Service
Table 7-10
318 THRESHOLD TEST DATA VALUES
V1
V2
V3
Expected
+0.3V (83
hex
)
-0.1V (7F
hex
)
+0.2V
1
+0.7V (87
hex
)
-0.5V (7B
hex
)
+0.2V
1
+1.1V (8B
hex
)
-0.9V (77
hex
)
+0.2V
1
+ 1.9V (93
hex
)
- 1.7V (6F
hex
)
+0.2V
1
+ 3.5V (A3
hex
)
-3.3V (5F
hex
)
+ 0.2V
1
+ 6.7V (C3
hex
)
-6.5V (3F
hex
)
+ 0.2V
1
-0.3V (7D
hex
)
+ 0.1V (81
hex
)
-0.2V
0
-0.7V (79
hex
)
+ 0.5V (85
hex
)
-0.2V
0
-1.1V (75
hex
)
+0.9V (89
hex
)
-0.2V
0
-1.9V (6D
hex
)
+1.7V (91
hex
)
-0.2V
0
-3.5V (5D
hex
)
+3.3V (A1
hex
)
-0.2V
0
-6.7V (3D
hex
)
+6.5V (C1
hex
)
-0.2V
0
V3 is calculated by (V1 +V2)/2 using two resisters, R1 10 and R1 15 (4.99 KQ) on the A05 baord. V3 is selected by U114
(differential 4-channel multiplexer, 4052BP) on the A04 board and sent to U236 (ultra fast dual comparator, SP9687) and
the Comparator U240C (quad comparator,
µ
PC339C) on the A02 INPUT-B board through the A08 board. In the A02
board, V3 is compared with ground by the U240C Comparator and this result is sent to 244C (quad 2-inputNOR gate,
10102) on the A02 board. U244C is enabled by U224 (hex D master-slave flip-flop, 10176) on the A02 board when the
MPU writes 0XXXX
binary
into it at I/O address 01
hex
. U244C (10102) on the A02 board outputs the Threshold TEST signal
to U144 (quad 2-input multiplexer, 10158) on the A04 board via the A08 board.
During this test, all outputs of the ACQ Memories on the A04 board are disabled (maintained at a low level) by forcing BS
to high from U114 (hex D master-slave flip-flop, 10176) on the A04 board. U114 is written by the MPU at I/O address
5A
hex
.
The MPU reads the data from the A04 board at I/O address 59
hex
, i.e., with READ ACQ DATA from U112 (binary to 1-8
decoder/multiplexer, 10162) on the A03 board. This reading sequence is the same as in the ACQ Test.
Then the MPU compares the MSB of the data read with the one expected. If they don’t match each other, the error
message will be issued.
7-27
Содержание 318
Страница 119: ...318 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Страница 182: ...338 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Страница 253: ...318 ___________________ TROUBLESHOOTING TREES ...
Страница 269: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service Figure 7 7 318 Word recognizer test ...
Страница 278: ...TM 11 6625 3145 14 Maintenance Troubleshooting 31 8 338 Service Figure 7 10 318 N and DELAY counter test 7 25 ...
Страница 313: ...TM 11 6625 3145 14 Figure 7 19 Troubleshooting Tree 8 Data Acquisition ACQ A01 A02 Sheet 4 of 6 7 60 ...
Страница 344: ...338 TROUBLESHOOTING TREES ...
Страница 362: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service 4434 567 Figure 7 39 338 Word recognizer test 7 109 ...
Страница 371: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service 4434490 Figure 7 42 338 N and DELAY counter test 7 118 ...
Страница 421: ...TM 11 6625 3145 14 Maintenance Troubleshooting 318 338 Service Figure 7 55 Troubleshooting Tree 12 T H A01 A02 7 169 ...
Страница 517: ...TM 11 6625 3145 14 318 338 4434 923 318 Block Diagram ...
Страница 518: ...TM 11 6625 3145 14 318 338 4434 924 338 Block Diagram ...
Страница 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
Страница 520: ...TM 11 6625 3145 14 318 338 4434 926 318 338 Mainframe Wiring Diagram ...
Страница 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
Страница 522: ...TM 11 6625 3145 14 318 338 4434 928 Figure 9 1 318 A01 Input A Board Component Locations ...
Страница 526: ...TM 11 6625 3145 14 ...
Страница 528: ...TM 11 6625 3145 14 Figure 9 3 318 338 A03 ACQ Control Board Component Locations ...
Страница 532: ...TM 11 6625 3145 14 ...
Страница 536: ...TM 11 6625 3145 14 ...
Страница 538: ...TM 11 6625 3145 14 ...
Страница 539: ...TM 11 6625 3145 14 ...
Страница 540: ...TM 11 6625 3145 14 ...
Страница 541: ...TM 11 6625 3145 14 ...
Страница 542: ...TM 11 6625 3145 14 Figure 9 8 318 338 A10 CRT Board Component Locations ...
Страница 544: ...TM 11 6625 3145 14 Figure 9 9 318 338 A11 Inverter Board component Locations ...
Страница 546: ...TM 11 6625 3145 14 Figure 9 10 318 338 A12 Regulator Board Component Locations ...
Страница 548: ...TN 11 6625 3145 14 Figure 9 11 318S1 338S1 A07 Serial RS232 Non Volatile Memory Board Component Locations ...
Страница 551: ...TM 11 6625 3145 14 Figure 9 12 338 A01 Input A Board Component Locations ...
Страница 553: ...TM 11 6625 3145 14 318 338 SERVICE ...
Страница 554: ......
Страница 555: ...PIN 058584 ...