Power supply checks
Power supply problems can be checked out using Table 4-2. See principles of operation for
circuit theory on the power supply.
Table 4-2
Power supply checks
Step Item/component Required condition Remarks
1
2
3
4
5
6
7
8
9
10
11
Line fuse
Line power
CR500 cathode
CR503 anode
CR504 cathode
CR505 anode
TP506
TP507
TP508
TP509
TP510
Check continuity.
Plugged into live
receptacle, power on.
+1200V ±10%
-1200V ±10%
+4
2V ±10%
-42V ±10%
+70
V ±10%
+15V ±5%
-15V ±10%
-70V ±10%
+5V ±5%
Remove to check.
Check for correct power-up
seq
uenc
e.
Referenced to TP501.
Referenced to TP501.
Referenced to TP501.
Referenced to TP501.
+70VF, referenced to TP500.
+15VF, referenced to TP500.
-15VF, referenced to TP500.
-70VF, referenced to TP500.
+5VF, referenced to TP500.
4-14 Troubleshooting
2410-902-01.book Page 14 Monday, November 7, 2005 2:49 PM
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