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TM 11-6625-3145-14
Verification and Adjustment Procedures-318/338 Service
10. ADJUST NON-VOLATILE MEMORY BATTERY BACKUP THRESHOLD
Equipment Required
1 Oscilloscope
1 Digital Multimeter (DMM)
1. Connect the DMM minus (-) lead to TP200 (GND) on the A07 S1 Board.
2. Connect the DMM plus (+) lead to TP101 (+5V) on the A07 Board.
3. Record the voltage measured.
NOTE
This voltage measurement must be recorded. At the end of this procedure, R 11 on
the A07 Board will be adjusted to reinstate this voltage reading. If the voltage is
not returned to this level, a complete recalibration of the machine may be
necessary.
4. 5V potentiometer R11 on the A12 Regulator board for a DMM indication of 4.65 ±0.01 V. (To locate
R11, see bottom rear of chassis.)
5. Connect the oscilloscope channel 1 probe tip to TP100 on the A07 S1 board.
6. Turn NVM THRESHOLD R101 on the A07 board clockwise until the oscilloscope reading is a stable-low.
7. Adjust NVM THRESHOLD by turning R101 in the opposite direction until the oscilloscope indication rises to a
stable-high level.
8. 5 V POTENTIOMETER R11 on the A12 REGULATOR Board to a DMM indication equal to that
recorded in step (3) above.
PERFORMANCE CHECK FOR THE 338
The Performance Check Procedure provides a detailed check of internal and external product characteristics.
These checks can be extensive and time-consuming. Under normal circumstances the Functional Check
Procedures will provide an adequate test of product performance in a less costly manner.
The Performance Check Procedure is organized into sets of tests for the mainframe, the acquisition module, each
type of the probes and 338S1 Serial Analyzer.
INDEX OF PERFORMANCE CHECKS
Test 1 - Threshold Voltages
Test 2 - Parallel Data Acquisition, Word Recognition, and Trigger Sequencer Checks with External Clock Minimum
Period.
Test 3 - Glitch Data Acquisition and Glitch Trigger
5-98
Summary of Contents for 318
Page 119: ...318 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 182: ...338 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 253: ...318 ___________________ TROUBLESHOOTING TREES ...
Page 344: ...338 TROUBLESHOOTING TREES ...
Page 517: ...TM 11 6625 3145 14 318 338 4434 923 318 Block Diagram ...
Page 518: ...TM 11 6625 3145 14 318 338 4434 924 338 Block Diagram ...
Page 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
Page 520: ...TM 11 6625 3145 14 318 338 4434 926 318 338 Mainframe Wiring Diagram ...
Page 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
Page 522: ...TM 11 6625 3145 14 318 338 4434 928 Figure 9 1 318 A01 Input A Board Component Locations ...
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Page 528: ...TM 11 6625 3145 14 Figure 9 3 318 338 A03 ACQ Control Board Component Locations ...
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Page 542: ...TM 11 6625 3145 14 Figure 9 8 318 338 A10 CRT Board Component Locations ...
Page 544: ...TM 11 6625 3145 14 Figure 9 9 318 338 A11 Inverter Board component Locations ...
Page 546: ...TM 11 6625 3145 14 Figure 9 10 318 338 A12 Regulator Board Component Locations ...
Page 551: ...TM 11 6625 3145 14 Figure 9 12 338 A01 Input A Board Component Locations ...
Page 553: ...TM 11 6625 3145 14 318 338 SERVICE ...
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Page 555: ...PIN 058584 ...