TC12 Installation, Commissioning & Maintenance Handbook
2.4.6
Power cable disconnected/faulty.
fuse blown.
PC faulty.
ulty.
PC Not running TC12 software. Check software
nd re-boot PC.
Software has failed - ignore all other SIP LEDs/audio
re driven). Re-boot PC. Re-install software
Note. If it becomes necessary to replace an IMD distribution box or the
2.4.6
odem on modem PCB - module
others OK Modem/IMD cable faulty
correct MDF connection
PCB h modem PCB to transformer PCB
cable, disconnected/ faulty
Modem/IMD cable not connected/ connected to
wrong four D-types/ cable faulty
B
PSU faulty on PSU PCB
No PSU PCB to modem PCB cables attached
IMD card/cables installed incorrectly/ faulty
2.4.6.4
Symptom Possible Reason
Power LED not on PSU PCB to Digital Output PCB ribbon cable not
connected or faulty.
Problems with PSU PCB i.e. fuse blown/no power to
PSU/faulty PSU
Watchdog Fail LED ON for
all PCBs connected Check SIP Panel PC 1 LED. If on, PC software is not
running - reboot PC
.2 PC Failure
Symptom Possible Reason
PC not Powered PC Switched off.
Mains plug fuse blown
Master switch panel off/
SIP PC 1 LED ON Digi I/O card card/cables installed incorrectly.
Digi I/O card fa
installation a
(softwa
and re-boot.
associated PCB they must be replaced in pairs.
.3 Modem Communication Problems
Symptom Possible Reason
No communication from one D-type disconnected from IMD distribution
m
In
OTU Disconnected/faulty
No communication from all Incorrect Mode set on Modem PCB.
four modems on Modem Radial system wit
No power to modem PCB - check power LEDs,
check modem PCB to PSU PCB cable
Telephone line connection problem at MDF
No communication from all No mains connection to PSU PCB
modems in one rack Low Voltage side of PSU not connected on PSU PC
Digital Output PCB Problems
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