Installation manual

SAFEPATH Manual Sheet 56 of 78
Rev. C April 1999
Procedure M
If the digital voice module system normal LED, the digital voice module system trouble LED, and the digital voice module trouble
indicator LED are off, the digital voice module may be completely inoperative due to power loss. This condition is caused by:
1. Input voltage is not within proper range or polarity is incorrect.
2. Blown fuse on the digital voice module (F1 on DX-100, F2 on DX-200).
3. One or more LED's are broken.
Perform the following:
1. Verify that input voltage is within proper range and that polarity is correct.
2. Check appropriate fuse on digital voice module.
If, after the above procedure is completed, the trouble condition persists, the trouble condition is caused by broken LED's on the
digital voice module. The LED's on the digital voice module are not field replaceable. Digital voice modules with broken LED's shall
be replaced immediately, following the “SAFEPATH Module Replacement Procedure”, set forth previously in this section.
Procedure N
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 is off, the digital voice module may be completely inoperative. This condition is caused by:
1. Too low input voltage on the digital voice module.
2. Missing or improperly inserted program memory EPROM.
3. Broken digital voice module trouble indicator LED (digital voice module is operative if this is the cause).
4. Failed circuitry on the digital voice module.
Perform the following:
1. Verify that the input voltage exceeds the minimum operating voltage.
2. Verify that the program memory EPROM is present and inserted into S46 properly.
3. Attempt to play a message file. If the file plays then the digital voice module trouble indicator LED is broken.
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 O
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 is steady on, the digital voice module is partially or completely inoperative. The digital voice module can be
rendered inoperative by:
1. Too low input voltage on the digital voice module.
2. Failed audio channel on the digital voice module.
3. Other failed circuitry on the digital voice module.
If the error was either due to the first or third cause, the digital voice module will not play messages. If the error was due to the third
cause, the serial port might be functioning properly, depending on what circuitry failed. If the error was due to the second cause, the
digital voice module might play messages and the serial port will function properly.
When the digital voice module is rendered inoperative, perform the following:
1. Verify that the input voltage exceeds the minimum operating voltage.
2. Attempt to play messages on all installed audio channels.
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.