SVC 11- 3
When disconnecting a plug, pull on the plug not on its wires. Pulling on the wires may
cause breakage.
9. Disconnect push- on type connectors J1, J2, J3, and J4 (from blade connectors P1, P2, P3,
and P4, respectively) by grasping each one and pulling it straight off of its terminal.
10. Disconnect connectors J26, J27, and J28 from their respective receptacles. (Remove each one
by squeezing its ribbed sides while simultaneously pulling it out of the receptacle.)
11. Use a 7mm nut driver to loosen, but not remove, the mounting nut corresponding to the mount-
ing slot at the left edge of the AC power supply PCB mounting bracket, alongside the power
transformer.
12. Use the nut driver to remove the two mounting nuts at the right edge of the AC power supply
PCB mounting bracket.
NOTE
The AC power supply PCB, and its associated mounting bracket, are removed and
replaced as a unit.
13. Lift the PCB bracket at its right edge while sliding it to the right to remove it from the instrument.
R3
P1 WHT
J28
F1
20A
R2
P3
P4
J26
J27
F2
6A
R1
Oven
120 Vac Single Phase AC Board
Blk
P2
MOUNTING
HOLES
MOUNTING
SLOT
14. Install the replacement AC power supply PCB in the reverse manner by sliding the mounting
slot on the left side of the PCB mounting bracket under the loosened mounting screw adjacent
to the transformer.
15. Install the two mounting nuts at the right edge of the AC power supply PCB mounting bracket.
16. Tighten the two mounting nuts and the mounting screw firmly.
17. Install connectors J26, J27, and J28 into their respective receptacles, pushing each straight
down until fully bottomed.
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