Crt Monitor Signals Check; Crt Monitor Assembly Cable Pin Assignments - HP 54501A Service Manual
100 mhz digitizing oscilloscope
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Also See for 54501A:
- Programming reference manual (386 pages) ,
- Operation reference (146 pages) ,
- Service manual (90 pages)
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6-15. CRT Monitor Signals Check
1 .
Remove top cover from instrument .
2 .
Check W6 for signals listed in table 6-2 . Refer to figure 6-13 for cable location . The
dynamic video signals FB (FULL BRIGHT) and HB (HALF BRIGHT) are single-ended TTL
inputs . Check for activity on these pins . Table 6-3 is the truth table for these signals .
Table 6-2 . CRT Monitor Assembly Cable Pin Assignments
HP 54501A SERVICE
PIN
SIGNAL DESCRIPTION
PIN
SIGNAL DESCRIPTION
1
+5 V (DIGITAL)
2
+12 V (DISPLAY)
3
GROUND (DISPLAY)
4
GROUND (DISPLAY)
5
+12 V (DISPLAY)
6
GROUND (DISPLAY)
7
+12 V (DISPLAY)
8
GROUND (DISPLAY)
9
+12 V (DISPLAY)
10
HSYNC
11
VSYNC
12
+12 V (DISPLAY)
13
GROUND (DIGITAL)
14
GROUND (DIGITAL)
15
GROUND (DISPLAY)
16
FB
17
GROUND (DISPLAY)
18
HB
a
19
GROUND (DISPLAY)
20
+5 V (DIGITAL)
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