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Removal and Installation Procedures
AWG510 & AWG520 Service Manual
6-57
Use this procedure to
troubleshoot the power
supply module.
Is
the principal power
switch in the on
position?
Is
line fuse
ok?
Turn off the principal power
switch. Replace the fuse. Turn
on the principal power switch.
Fix the power problem.
Replace the power
supply module
(page 6-32).
Yes
Yes
No
Turn on the principal
power switch.
Does
the fuse blow
again?
No
Power off and remove the cover using
the Cabinet removal procedure. Check
all the cables coming out of the power
supply module and the cabling
between modules. Be sure every cable
is attached securely.
No
Yes
Are the
voltages on the
A10/A11 Connector board
TP100 : +5 V, TP101 : +12 V
TP102 : +24 V, TP103 : -4.6V
(see Figure 6-33 on
page 6-62)
?
Press
the ON/STBY button.
Does the generator
power on?
Turn on
the principal power
switch. Can you hear the
tick of relay actuator in
the power supply
module?
Turn off the principal power switch.
Remove the generator cabinet using
the cabinet removal procedure. Check
the cables from the A10/A11 Connector
board. Disconect the cables at J1 and
J2 on the power supply module.
Press
the ON/STBY button.
Does the generator
power on?
Yes
Check these power supply voltages
on J3 on the A10/A11 Connector board:
+5 V"3 %, -4.6 V"5%,
+12 V"5 %, +24 V"5%.
Check these power supply voltages
on J2 on the power supply module:
-2 V"20 %, -8 V"20 %, +8 V"20 %
(see Figure 6-29 for the power supply
connector pin assignment).
Are
the voltages
ok?
The power supply module is ok.
Perform isolation troubleshooting for
the modules on the bottom of the
generator: A50 AWG board, A40 Clock
board, A71/72 Output board).
Connect
a jumper strap to
J30 on the A10/A11 (Manual
PON; see Figure 6-33 on
page 6-62). Does the
generator power
on?
The power supply module is ok.
Perform isolation troubleshooting for
the A30 GPIB board and the A20
Front Panel board.
Yes
No
Yes
No
Yes
No
Yes
No
No
No
Yes
Figure 6-28: Troubleshooting procedure 1 Ċ Power Supply module