TM 11-6625-3145-14
Verification and Adjustment Procedures-318/338 Service
e. Select the Threshold menu and set LEVEL V1 = 0.0 V, and V2 = 0.0 V.
f. Set INPUT DATA = V1.
g. Press the START key.
h. Set the oscilloscope controls so that channel 1 and channel 2 waveforms are superimposed.
i. Adjust C10 (COMPENSATION) on the A07 board so that the shape of the channel 1 waveform most nearly
matches the shape of the channel 2 waveform.
j. Press the STOP key.
k. Remove 40 pF normalizer from SERIAL DATA INPUT and from the BNC T-connector.
I. Connect P6107 Serial Data Probe from the SERIAL DATA INPUT jack to the male end of the BNC T-connector.
m. Adjust the oscilloscope controls so that the channel 1 and channel 2 waveforms are superimposed.
n. Remove the P6107 Serial Data Probe CALIB SEAL.
o. Adjust P6107 Probe compensation screw so that the waveform corners are square.
p. Reinstall the CALIB SEAL.
q. Disconnect the test probes.
11. Adjust Non-volatile Memory Battery Backup Threshold
Equipment Required
1.
Oscilloscope
1.
Digital Multimeter (DMM)
Refer to Figures 5-16 and 5-17.
a. Connect the DMM minus (-) lead to TP200 (GND) on the A07 board.
b. Connect the DMM plus (+) lead to TP101 (+5 V) on the A07 board.
c. Record the voltage measured.
d. 5V POTENTIOMETER R11 on the A12 REGULATOR board for a DMM indication of 4.65 + 0.01 V.
e. Connect the oscilloscope channel 1 probe tip to TP100 on the A07 board.
f. Set the oscilloscope to 1
µ
s/div. and 2 V/div., dc.
g. Turn NVM THRESHOLD R101 on the A07 board clockwise until the oscilloscope indication is low.
h. Adjust NVM THRESHOLD R101 by slowly turning counterclockwise until the oscilloscope waveform level rises
to high.
h. 5V POTENTIOMETER R11 on the A12 REGULATOR board for a DMM indication equal to that
recorded in step (c) above.
5-41
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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