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POWER
PC BOARD
CAPACITOR
C3
Power Bd.
Rectier
6 5 4 4 3 12 11 10 9 8 7
3 2 1 2 1 6 5 4 3 2 1
FIGURE F.7 – POWER BOARD TEST
POWER BOARD TEST PROCEDURE (CONTINUED)
PROCEDURE
1. Disconnect the input power to the POWER
WAVE 655/R.
2. Remove the case top.
3. Locate the Power Board and plugs J42 and
J43. Do not remove plugs or leads from the
Power Board. Refer to Figure F.7.
4. Carefully apply input power to the POWER
WAVE 655/R.
ELECTRIC SHOCK can kill. High
voltage is present when input
power is applied to the machine.
5. Turn on the POWER WAVE 655/R. Carefully
test for the correct voltages at the Power Board
according to Table F.4.
6. If either of the 40 VDC voltages is low or not
present at plug J41, perform the DC Bus PC
Board Test. See the Wiring Diagram. Also
perform the T1 Auxiliary Transformer Test.
7. If any of the DC voltages are low or not present
at plugs J42 and/or J43, the Power Board may
be faulty.
8. Replace the case top.
TROUBLESHOOTING & REPAIR
F-26 F-26
POWER WAVE 655/R
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WARNING