S 715-093
(2) Do a check of the SELCAL system to test the PTT switch reset function:
(a) Use the VHF-L system to have the airplane assigned SELCAL code transmitted from the ground station over the VHF-L communications. Use the same appropriate test frequency.
NOTE: If the transmitting station is not available, make a
____ SELCAL coded transmission with the SELCAL encoder. Make sure the transmissions are approved.
(b)
Make sure the VHF-L switchlight on pilots' call panel (P5) comes on.
(c)
Push captains' PTT switch and make sure the VHF-L switchlight on pilots' call panel goes off.
NOTE: Make sure the appropriate microphone switch is set on
____
the captain's audio-selector panel.
S 715-094
(3) Do a check of the SELCAL system to make sure you receive signals from the VHF-R system:
(a) Do a test equivalent to the VHF-L test, but use the VHF-R communication system.
S 715-095
(4) AIRPLANES WITH VHF-C COMMUNICATION SYTEM; Do a check of the SELCAL system to make sure you receive signals from the VHF-C system:
(a) Do a test equivalent to the VHF-L test, but use the VHF-C communication system.
S 715-096
(5) AIRPLANES WITH LEFT HF COMMUNICATION SYSTEM; Do a check of the SELCAL system to make sure you receive signals from the HF-L system:
(a) Do a test equivalent to the VHF-L test, but use the HF-L communication system and an HF frequency.
S 715-097
(6) AIRPLANES WITH RIGHT HF COMMUNICATIONS SYSTEM; Do a check of the SELCAL system to make sure you receive signals from the HF-R system:
(a) Do a test equivalent to the VHF-L test, but use the HF-R communication system and an HF frequency.
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757
MAINTENANCE MANUAL
S 865-091
(7) Put the Airplane back to its usual condition
(a)
Put SELCAL system back to its usual condition.
(b)
Put the HF and VHF radio communication systems back to their usual condition.
(c)
Remove electrical power if it is not necessary
(AMM 24-22-00/201).
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757 MAINTENANCE MANUAL
SELCAL DECODER - REMOVAL/INSTALLATION
_____________________________________
1. General_______
A. This procedure contains two tasks. The first task is the removal procedure. The second task is the installation procedure.
B. SELCAL decoder M180 is on shelf 3 of main equipment center rack E4.
TASK 23-21-01-004-002
2. Remove the SELCAL Decoder_________________________
A. References
(1) AMM 20-10-01/401, E/E Rack Mounted Components
B. Access
(1)
Location Zone
119/120 Main Equipment Center
(2)
Access Panels
119BL Main Equipment Center
C. Procedure
S 864-010
(1) Open this circuit breaker on the overhead panel P11 and attach DO-NOT-CLOSE tag:
(a) 11G3, SELCAL
S 024-013
(2) Remove SELCAL decoder (AMM 20-10-01/401).
TASK 23-21-01-404-001
3. Install SELCAL Decoder______________________
A. General
(1) SELCAL decoder M180 is on shelf 3 of main equipment center rack E4.
B. References
(1)
AMM 20-10-01/401, E/E Rack Mounted Components
(2)
AMM 24-22-00/201, Electrical Power - Control
C. Equipment
(1) Encoder
(a) CTS-700 Ramp Test Set (PN: 10000005-01 or 10000005-02) Avtech Corporation 3400 Wallingford Ave N Seattle, WA 98013
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