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KV-21M3/21T3
4-3. BE-4A SELF DIAGNOSTIC
SOFTWARE
The identification of errors within the BE-4A chassis is triggered in 1 of 2 ways :- 1: Bus busy or 2: Device failure to respond to
1°C. In the event of one of these situations arising the software will first try to release the Bus if busy (Failure to do so will
report with a continuous flashing LED) and then communicate with each relevant 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 by a 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 occurred, but if a non fatal error occurs
the set will try to continue to operate.
Table 1
No. of Flashes
Meaning
Flash Timing Example : e.g. error number 3
2
1C301 not acknowledging' C transmission, NVM OK.
Stby LED
3
1C301 FAULT (Not OK) - flags
ON
ON
ON
IC301 - No H Flyback
OFF
OFF
1C301 - Stack Overflow
6
Overvoltage / Overcurrent Protection (Pin 52) high.
the pe fe
etl
ee
ee
Oe
ee
7
IC002 not acknowledging IC transmission, IC301 OK.
8
IC002 and IC301 - No | C acknowledgement
SDA or SCL being held low
9
General PC Error (
)
(IC301, 1C001, ICO02, CNO01)
Note : Deflection System Adjustments should not be carried
out whilst using an NTSC (60Hz) signal, or if the
signal is unlocked.
— 99 —
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