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TM 11-6625-3145-14
Verification and Adjustment Procedures-318/338 Service
2. Connect the P6107 External Clock probe tip to the other side of the BNC T-connector.
3. Setup the oscilloscope as follows:
Mainframe
Horizontal Mode B
7A26
Position
Rising edge at center screen
Channel 1
VOLTS/DIV
20 mv (200 mv with 10X probe)
Trigger Source
CH 1
Display Mode
ALT
Position
0 v at mid screen
Channel 2
VOLTS/DIV
50 mv (500 mv with 10X probe)
Position
0 v 2.4 divisions above midscreen (-1.4 v at midscreen)
7B85 Slope
+
Triggering
Mode Coupling Source
Auto AC INT
Magnification
1X
Hold Off
at minimum
B Delay Mode
B Starts after DLY
Time/DIV
50 ns (5 ns with magnification)
Trace Sep
On, minimum
∆
Time
zero
7B80 slope
+
Triggering
Mode Coupling Source
Auto
AC
INT
Position
rising edge at center screen
Hold Off
at minimum
Time/Div
10 ns (1 ns with magnification)
4.
Set the pulse generator as follows:
Termination
BACK TERM (switch pulled out)
Period 0.1
µ
s
Duration 10ns
(5 ns X 2)
High level
+ 0.35V
Low level
-0.35V
5. Select the A timebase and place the rising edge of the channel 1 waveform on the center graticule of the
oscilloscope screen.
6.
Select the B time base.
7.
Turn DELAY TIME of the A time base to place the rising edge of the channel 1 waveform on the center
graticule.
Strap Adjustment with Extender Boards
1.
Turn off the 338.
2.
Remove the A03 ACQ Control board and the A04 ACQ Memory board using the board ejectors.
3.
Install two Extender boards into the J03 and J04 connectors.
4.
Mount the A03 ACQ Control board and the A04 ACQ Memory board on the top of the Extender boards.
5.
Turn on the 338.
5-90
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 ...
Page 532: ...TM 11 6625 3145 14 ...
Page 536: ...TM 11 6625 3145 14 ...
Page 538: ...TM 11 6625 3145 14 ...
Page 539: ...TM 11 6625 3145 14 ...
Page 540: ...TM 11 6625 3145 14 ...
Page 541: ...TM 11 6625 3145 14 ...
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 ...
Page 554: ......
Page 555: ...PIN 058584 ...