SAFEPATH Manual
Sheet 58 of 78
Rev. C April 1999
Procedure R
If the digital voice module system normal LED is off, the digital voice module system trouble LED is on, and the digital voice module
trouble indicator LED flashes a 3-blink pattern, an input error has occurred. An input error may be caused by:
1. Open field wiring.
2. No end-of-line resistor on an input line.
3. Inputs on digital voice module are also being used when Series DV-EM's are being used.
4. Previously installed Series DV-EM is no longer detected by digital voice module.
5. Failed circuitry on digital voice module or Series DV-EM.
If the error was due to one of the first four causes, the trouble will clear automatically when the cause is corrected.
When an input error is indicated, perform the following:
1.
Check all input wiring for open circuits.
2.
Verify that all supervised input wiring has a 10K end-of-line resistor across last input device.
3. Verify that all unsupervised inputs or unused inputs have 10K resistors mounted at terminal blocks. (If Series DV-EM's are
used, the eight unused digital voice module inputs shall not have 10K resistors installed. Note that DV-EM's have these 10K
resistors mounted on the printed circuit board.)
4.
If Series DV-EM's are installed, remove any field wiring from eight digital voice module inputs.
5.
A previously installed Series DV-EM is no longer detected. Note that once a Series DV-EM has been installed, the digital voice
module will always check for it and give a trouble condition if it doesn't detect it.
If, after the above procedure is completed, the trouble condition persists, the trouble condition is caused by failed circuitry on the
digital voice module. There are no field correctable failed circuitry problems on the digital voice module. Digital voice modules with
failed circuitry shall be replaced immediately, following the “SAFEPATH Module Replacement Procedure”, set forth previously in this
section.
Procedure S
If the digital voice module system normal LED is off, the digital voice module system trouble LED is on, and the digital voice module
trouble indicator LED flashes a 4-blink pattern, an audio channel error has occurred. An audio channel error may be caused by:
1. Too low audio level while playing a message.
2. Pause in message while playing a message.
3. The audio output is loaded down by a low impedance input device.
4. Additional output channel I.C.(s) not installed in sequence.
5. Missing or improperly replaced audio channel.
6. Failed audio channel on the digital voice module.
If the error occurs while playing a file, the error was due to one of the first three possible causes. If the error occurs immediately
after turning on power to the digital voice module, the error was due to one of the last three possible causes.
If the error was due to too low of an audio level or a pause while playing a message, the trouble will clear automatically when audio
is again detected while a message is playing. If the error was due to the audio output being loaded down, the trouble will clear
automatically when the output is no longer loaded down while a message is playing. If the error was due to a missing or improperly
replaced output channel I.C., the trouble will clear automatically when the I.C. is correctly in place and input power is cycled off and
on.
When an audio channel error is indicated, perform the following:
1.
Turn up volume on the digital voice module.
2.
Re-record message, shortening duration of the pause.
3.
Check impedance of line output wiring and impedance of input device.
4. Verify that output channel I.C.'s were installed in proper sequence. Example: An I.C. must be installed in S21 before an I.C.
can be installed in S22, and I.C.'s must be installed in S21 and S22 before an I.C. can be installed in S23.
5.
Check for properly inserted output channel I.C.'s (in sockets S21, S22 and S23). Note that once an I.C. has been inserted into
a socket, the digital voice module will always check for it and give a trouble condition if it doesn't see it.
If, after the above procedure is completed, the trouble condition persists, the trouble condition is caused by failed circuitry on the
digital voice module. There are no field correctable failed circuitry problems on the digital voice module. Digital voice modules with
failed circuitry shall be replaced immediately, following the “SAFEPATH Module Replacement Procedure”, set forth previously in this
section.
Содержание SAFEPATH SAPE-1AB
Страница 10: ...SAFEPATH Manual Sheet 11 of 78 Rev C April 1999 Figure 1 Basic Capabilities of the SAFEPATH Panel...
Страница 19: ...SAFEPATH Manual Sheet 20 of 78 Rev C April 1999 Figure 3 Operator s Console...
Страница 24: ...SAFEPATH Manual Sheet 25 of 78 Rev C April 1999 Figure 5 DX 100 Module Illustration...
Страница 25: ...SAFEPATH Manual Sheet 26 of 78 Rev C April 1999 Figure 6 DX 200 Module Illustration...
Страница 28: ...SAFEPATH Manual Sheet 29 of 78 Rev C April 1999 Figure 7 SAFEPATH Panel Mounting...
Страница 32: ...SAFEPATH Manual Sheet 33 of 78 Rev C April 1999 Figure 8 Typical System Block Diagram...
Страница 62: ...SAFEPATH Manual Sheet 63 of 78 Rev C April 1999 Figure 30 Module Layout of the SAFEPATH Panel...
Страница 63: ...SAFEPATH Manual Sheet 64 of 78 Rev C April 1999 Figure 31 SAFEPATH Panel Block Diagram...
Страница 66: ...SAFEPATH Manual Sheet 67 of 78 Rev C April 1999 Figure 33 Supervised Audio System Common Control Module...
Страница 70: ...SAFEPATH Manual Sheet 71 of 78 Rev C April 1999 Figure 35 Self Amplified Speaker Control Signal Circuit Module...
