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TM 11-6625-3145-14
Verification and Adjustment Procedures-318/338 Service
DC Gain
1. Connect the P6107 External Clock probe ground clip to the power supply minus (-) terminal.
2. Connect the P6107 External Clock probe tip to the power supply plus (+) terminal.
3. Adjust the regulated dc power supply output voltage to + 10.00V as measured by the DVM.
4. Set Threshold LEVEL V1 to +10.0v.
5. Press the START key.
6. Turn EXT CLK DC GAIN R287 on the A02 INPUT-B board to the counterclockwise end.
7. Turn R287 clockwise slowly while observing the oscilloscope waveform and mark the point where the
waveform moves from stationary-low level to stationary-high level.
8. Then turn R287 to the clockwise end.
9. Turn R287 counterclockwise slowly while observing the oscilloscope waveform and mark the point where the
waveform moves from a stationary-high level to a stationary-low level.
10. Adjust R287 to the center position between the points you marked in procedures (7) and (9).
11. Press the STOP key.
Figure 5-49. 338 Threshold voltage adjustment on the A02 INPUT-B board.
DATA Threshold DC Balance Adjustment
1. Ground all the leads of the P6451 Parallel Data probes in all Pods (A through D).
2. Set Threshold LEVEL V1 to 0.0 V.
3. Set the INPUTs for Pods A through D to V1.
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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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