TM 11-6625-3145-14
Verification and Adjustment Procedures-318/338 Service
Table 5-5.
318 CLOCK DELAY WITH EXTENDER
Clock
Signal Edge*
Delay (ns)
Test Point
Adjustable
Capacitor
RET CLK
↑
47.60
±
1.00
TP400 (A03)
J200(A03)
WE
↓
55.40
±
1.00
TP200-2(A04)
J300(A03)
TRIG CLK
↑
68.10
±
1.00
TP500 (A03)
J400(A03)
*
↑
means rising edge;
↓
means falling edge
C. Capacitor adjustment
1. Refer to Figures 5-21 and 5-22. Select the Threshold menu and set INPUT EXT CLK = V3 (0.00 v).
2. Select the Trigger menu and set CLK = EXT
↑
.
3. Set the Events field to: 00000*WA OFF:WB OFF:WC. This will cause the 318 to acquire data without triggering.
4. Press the START key.
5. Repeat the following procedures, (6) through (f), to adjust each clock delay and/or width shown in Table 5-6.
6. Connect the oscilloscope channel 2 probe tip to the corresponding test point given in Table 5-6.
7. Turn
∆
-TIME clockwise to display the clock delay value given in Table 5-6.
8. Adjust the corresponding capacitor to place the rising or falling edge (indicated by
↑
or
↓
in Table 5-6) of the
channel 2 waveform within one graticule division of the rising edge of the channel 1 waveform.
9. Press the STOP key.
NOTE
Vertically position signals to center around mid-screen. Delays are measured from
threshold to threshold of each circuit.
Table 5-6.
318 CLOCK DELAY WITHOUT EXTENDER
Clock Signal
Edge*
Delay (ns)
Test Point
Adjustable
Capacitor
RET CLK
↑
46.60
±
0.50
TP400 (A03)
C100(A03)
WE
↓
54.40
±
0.50
TP200-2(A04)
C102(A03)
WE
↑
61.40
±
0.50
TP200-2(A04)
C106(A03)
ADRS CLK
↑
61.40
±
0.50
TP200-4(A04)
C104(A03)
*
↑
means rising edge;
↓
means falling edge
5-37
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 ...
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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 ...