BEL 6110, Operator'S And Service Manual, Page: 21 / 29

TROUBLESHOOTING
The Bel 6110 is designed and constructed to ensure a long and fault free life, but if
a problem does occur the following guidelines are provided.
The unit is constructed using 2 main printed circuit boards and 7 sub assembly
boards.
The 2 main PCBÕs carry the processor/DSP circuits (CPU) and the analog/digital
input output systems (ADAREF). Seven smaller PCBÕs carry:-
1. The keyboard interface
2. The LCD interface
3. A system power supply
4. ÔAnalogÕ I/O - Protection and EMC suppression
5. Digital AES/EBU I/O protection and EMC suppression
6. Time-code, remote and RS422 protection and EMC suppression
7. Memory module or modules
All of these printed circuit boards can be rapidly replaced. (see servicing section)
If the outline fault finding suggestions which follow are unsuccessful, contact your
BEL distributor, or the main BEL distributor, who will advise you and arrange for the unit to
be repaired or provide replacement PCBÕs.
Fault Causes Action
ÔDeadÕ unit Power supply Check fuses in the IEC and supply connector then
fault PCB check fuses & connectors on the power supply
Only fan or Power supply Check fuses on the power supply PCB
backlight on fault
No record In follow mode Check if in follow mode there is valid timecode at
with no timecode input on rear panel
timecode input
No audio output No recording Check audio is present at the inputs (PPI indicators)
made no audio ensure the required input mode digital or analog is
at inputs digital selected. Check input sensitivity control (front panel)
input selected
with no input
(AES)
Noisy digital No digital REF- Ensure that an AES reference is connected (48kHz)
AES selected to the unit if AES REF is selected
Distorted output Headroom Adjust input sensitivity control
Noisy output Loose or Check all memory modules are fitted correctly
analog or digital misaligned
memory module
Remote control Remote connect- Check remote connection is fully pushed in and lock.
inoperative or ion not fully push- Check cable for damage.
intermittent ed in on rear panel
broken wires in
remote cable
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