R R NOTE : There is no indication of CVR function when operating in____ the automatic mode.
R R R R R R (f) Relay 20RK This relay is energized as long as the RCDR/CVR TEST pushbutton switch is pushed. Its contacts are used to control the transition of the test signal towards the loud speakers. When this relay is de-energized, it ensures transmission of the TCAS signal (Ref. 34-43, TCAS) to the loud speakers.
R **ON A/C ALL
C. Erasure
(1) Manual erasure The push to erase function is activated using a discrete input of the SSCVR (activated using the RCDR/CVR ERASE pushbutton switch 3RK and when the parking brake and landing gear relays are closed). This discrete must be activated for a minimum of one-half second to activate this function. Once activated, this function disables the ability to download the previously recorded data from the CSMU using the normal download function. A 400 Hz tone is sent through the audio monitor to indicate a successful erase.
NOTE : The SSCVR is energized for 5 minutes after the last engine is____ shutdown. Erasure is possible only if the SSCVR is powered (Ref.para.4). The erase signal generated by the bulk erase timing assembly, is applied to the Bulk Erase through: - The normally-open (NO) contacts of SYS 2 L/G position relay 12GB - The normally-open (NO) contacts of relay 14RK, this relay being energized when parking brake is ON - The normally-open (NO) contacts of the RCDR/CVR ERASE pushbutton switch. The Bulk Erase function generates a digital signal for the CPU which erases the CSMU information.
NOTE : The timing circuit in the Solid States cockpit voice recorder____ activates the Bulk Erase for 5 seconds (minimum). This ensures that the complete CSMU information is erased.
(2) Automatic erasure The erase function erases the previously recorded information on all 4 channels simultaneously before a new recording is made.
8. Test
____
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-213,
The Push-To-Test function is activated using a discrete input of the SSCVR (activated using a pushbutton RCDR/CVR TEST switch 5RK located on the overhead panel). The discrete must be activated for a minimum of one-half second to activate this function. Once activated, this function performs an extensive set of functional tests to determine the integrity of the system. A successful self-test results in the status discrete output being activated once.This results in one activation of the status LED (whichever is present) on the SSCVR. In addition to the visual indication, an aural indication is provided through the audio monitor output received at the CVR/HEAD SET JACK (on the maintenance panel 50VU) or at the two loud speakers an 800 Hz tone is sent to indicate successful self-test. There is one pulse.
R **ON A/C 106-149, 214-299, 301-399, 401-499,
The Push-To-Test function is activated using a discrete input of the SSCVR (activated using a pushbutton RCDR/CVR TEST switch 5RK located on the overhead panel). The discrete must be activated for a minimum of five seconds to activate this function. Once activated, this function performs an extensive set of functional tests to determine the integrity of the system. A successful self-test results in the status discrete output being activated once.This results in one activation of the status LED (whichever is present) on the SSCVR. In addition to the visual indication, an aural indication is provided through the audio monitor output received at the CVR/HEAD SET JACK (on the maintenance panel 50VU) or at the two loud speakers an 600 Hz tone is sent to indicate successful self-test.
R **ON A/C 001-049, 051-061, 101-149, 151-199, 201-299, 301-399, 401-499,
A 800Hz tone is sent to the headset jack and to the loud speakers for aural indication.
**ON A/C 062-099,
The tone is amplified to the two loudspeakers (to the HEADSET jack on the CVR and to the CVR/HEAD SET jack on the maintenance panel 50VU) for aural indication.
1EFF : ALL 1 23-71-00Page 21 1 1 Aug 01/05 1 1 1CES 1 COCKPIT VOICE RECORDER - ADJUSTMENT/TEST
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TASK 23-71-00-710-001
Operational Test of the CVR and the CVR Channel Recording
WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______
YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
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