Tektronix TD140, Hardware Maintenance Manual

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TD140 Hardware Maintenance Guide 7.13.2 34
4
TD140 Maintenance Guidelines Rev. 001-140228
2. With both ejector handles fully open, slide the PPM into the shelf node slot until
the ejector latches touch the front of the shelf. The PPM is correctly aligned and
inserted when:

The PPM edges fit within the narrow shelf guide rails.

A hook on each ejector latch slides into a notch in the shelf just before the
latch touches the shelf.

The PPM mates with the alignment receptacles of the corresponding RTM
(if installed).
3. When the PPM is inserted all the way into the shelf, simultaneously close both
ejector handles inward. This seats the PPM connectors into the shelf backplane
(
Figure 4.3
).
Figure 4.3 - Close Handles
The hot swap (H/S) LED flashes until the PPM is fully powered, then the H/S
LED turns off and the power (PWR) or in service (IS) LED turns on.
The installation may have failed if the following LEDs illuminate as noted:

The H/S LED remains solid blue or continues to flash after the PPM is
inserted.

The ATTN LED is lit.
4. Secure the PPM in its slot by hand-tightening the retaining screws on each end
of the PPM front panel.
R
EPLACING A
PPM40 RTM
Refer to the following sections for more information:

Remove the PPM40 RTM

Install the PPM40 RTM
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