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TM 11-6625-3145-14
Verification and Adjustment Procedures-318/338 Service
WARNING
Do not reverse the power supply connections when common is connected to
ground; that would allow excessive current to pass through to the P6451 Probe
ground. If the P6451 Probe ground lead is connected to a large current source the
probe will be damaged.
e.
Connect the P6451 Probe GND leads from Pods A and B to the power supply reference (-) terminal.
f.
Connect the P6451 Probe DATA leads from Pods A and B to the Power Supply plus (-) terminal.
g.
Power-up and setup 318 as follows:
THRESHOLD MENU
INPUT
EXT CLK =
TTL
POD A =
TTL
POD B =
TTL
TRIGGER MENU
CLK
EXTT
POSN
DELAY
00249
Events
00001*WA FLW’D BY:WB OFF:WC
2.
Threshold Level TTL
a.
Repeat the following procedures, (b) through (e), for two voltage levels of the power supply output given in
Table 5-7.
b.
Set the pulse generator output level to that given in Table 5-7 as measured by the oscilloscope. Set the
oscilloscope so that + 1.4 V is at midscreen:
1.
Set the DVM for 1.40 V
2.
Momentarily move the oscilloscope CH1 probe to the DVM + 1.40 V output.
3.
Set the oscilloscope vertical Volts/DIV so that the screen reads 200 mV (20 mV setting using 10x probe).
4.
Adjust the vertical position so that the trace is at midscreen (+ 1.40 V at midscreen).
5.
Return the oscilloscope CH1 probe to the pulse generator’s BNC T-connector.
6.
Adjust the pulse generator output so that the signal is 1 1/4 divisions above and 1 1/4 divisions below
midscreen (+ 1.15 V to = 1.65 V).
c.
Set the power supply level to the voltage given in Table 5-7 as measured with the DVM.
d.
Press the START key and wait for the acquisition to be completed; make sure that SLOW CLOCK is not displayed
on the CRT.
e. Press the DATA key until the State Table is displayed. Check that data acquired are equal to the Expected Data
5-45
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 ...
Page 526: ...TM 11 6625 3145 14 ...
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 ...