Power Supply - HP 340 Series Service Manual

1. Remove the seven screws holding the rear panel to the case.
2. Remove the rear panel's interface port fasteners in the back panel as follows:
a. Video connector lock nuts, using the 9/16-inch open-end wrench.
b. HP-IB, using the 9/32-inch nutdriver.
c. RS-232, using the 3/16-inch nut driver.
d. ThinLAN:
• BNC connector nut, using the 9/16-inch open-end wrench.
• Rear panel cover plate screw, using the Torx screwdriver.
Note that the capacitor-washer next to the rear panel rnay be cracked. If so, it will
need to be replaced during rear panel installation.
e. AUI LAN: slide the connector clip to the right side (left, looking from the rear) to
the unlocked position.
f. LGB interface (if installed), use a #1 Pozidriv screwdriver.
3. If a DIO-I slot is installed, use a Torx T-10 screwdriver to remove the four screws holding
the DIO-I card guide to the rear panel.
4. Remove the power supply grounding screw (Figure 2-5).
5. Pull the rear panel, power supply side first, away from the internal assembly.
Installation
To install the rear panel:
1.
Place the rear panel in position on the internal assembly aligning the four power supply
tabs and four SPU card cage alignment pins (two on each side) with their respective holes
in the rear panel.
2. Reverse the first four removal steps.
Power Supply
Note
The power supply assembly does not have any internal replaceable
assemblies except for the fuse. All parts, including the fan, line filter,
fuse holder, printed circuit board and metal case are available only as
a complete unit.
32
Assembly Replacement