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4-3. BE-3B SELF
DIAGNOSTIC
SOFTWARE
The identification of errors within the BE-3B chassis is
triggered in 1 of 2 ways :- 1: Bus busy or 2: Device failiure
to respond to HC. In the event of one of these situations
arrising the software will first try to release the bus if busy
(Failiure to do so will report with continous flashing LED)
and then communicate with each device in turn to establish if
a device is faulty. If a device is found to be faulty the
relevant device number will be displayed through the led
(Series of flashes which must be counted) See Table 1., on
fatal errors are reported with this method.
If a fatal error is found the set will simply stay in whichever
state it was when the error occured, but if a non fatal error
occurs the set will try to continue operation.
Table 1
Device
LED Error
Fatal Error
Count
NVM
2.9
|
V
Teletext
10
Jungle
11
V
Video_sw
12
13
V
14
|
a
Flash Timing Example : e.g. error number 3.
Stby LED
ON
ON
SU ce JTL oe_IIIL.
— 23 —
KV-B253
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