L3 FA2100 CVR Component Maintenance Manual With Illustrated Parts List page 249

(12) Remove the Assembly Support Tool fixture, Table 701: item 5 from under the Air-
craft Interface PWA.
(13) Carefully lift the Audio Compressor PWA from the rear panel assembly observing
proper ESD handling precautions.
(14) If the Audio Compressor PWA is the faulty component, then package it in an static-
resistant container for shipment to the factory for repair.
E. Aircraft Interface PWA (AI) Removal
(See Figure 307 or IPL Figure 1, Item 105)
The Model FA2100CVR Aircraft Interface PWA is mounted in the rear panel assem-
bly of the recorder chassis. It provides the Cockpit Voice Recorder with an interface
to the Aircraft's power and Cockpit Control Unit, through the rear panel connector,
J1A. It also provides operating voltage to the storage capacitor and routes the input
voice, GMT and RSE signals to the Audio Compressor PWA.
AIRCRAFT INTERFACE PWA REMOVAL PROCEDURE
(1) Remove the Audio Compressor PWA (1-155) from the rear panel assembly as de-
tailed in Para. D. above.
(2) Disconnect the interconnection cable assembly, W001 (1-165), from J2 and W002
(1−170) from J3 on the Aircraft Interface PWA. Keep these cables for later use.
(3) Remove 4 flat-head screws (1-130) that attach the J1A Main connector on the Air-
craft Interface PWA to rear panel assembly (1-90).
(4) Disconnect the storage capacitor red blade connector (39Vdc Hot) from the top,
J4, connector on the Aircraft Interface PWA.
(5) Disconnect the storage capacitor black blade connector (39Vdc Return) from
the lower, J5, connector on the Aircraft Interface PWA.
(6) Remove 3 pan-head screws (1-125) which mount the two upper standoffs (1-110),
and center standoff (1-115) between the rear panel assembly and Aircraft Inter-
face PWA.
(7) If storage capacitor is faulty, remove it by performing step (8), otherwise, skip
step (8).
(8) On pre MOD DOT 11, remove two flat-head screws (1-140), flat washers
(1-145) and self−locking hex nuts (1-150) that secure the storage capacitor to
the top of the rear panel assembly.
(9) On post MOD DOT 11, remove two flat-head screws (1-141), from the support
capacitor bracket (1−146) that secure the storage capacitor to the top of the
rear panel assembly.
Use or disclosure of information on this sheet is subject
to the restrictions on the cover page of this document.
The document reference is online, please check the correspondence between the online documentation and the printed version.
AVIATION RECORDERS
COMPONENT MAINTENANCE MANUAL
FA2100CVR
23–70–04
Disassembly
Rev. 15 Page 312
Apr. 14/16