Self Diagnostic Software - Sony TRINITRON KV-20WS1A Service Manual

KV-20WS1
4-3. BE-5 SELF DIAGNOSTIC SOFTWARE
The identification of errors within the BE-5 chassis is triggered in 1 of 2 ways :- 1: Bus busy or 2: Device failure to respond to
2
I 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), Non 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.
To check error code it is necessary to use TV error display part number S-188-900-10.
Table 1
No. of
Error
Notes
Flashes
code
00
-
(2) 30
2
(3) 31
3
(2) 32
4
33
-
(4) 40
5
(3) 91
6
(1) 10
7
(3) 20
8
(1) 01
9
10 (3) 90
(1) Only reported on mains power up.
(2) Reported on mains power up or exiting standby.
(3) Reported at any time and result in the set reverting to standby mode.
(4) Reported at any time and result in the set reverting to audio mute mode.
Note : Deflection System Adjustments should not be carried
out whilst using an NTSC (60Hz) signal, or if the
signal is unlocked.
No error.
Jungle nacks IIC bus1 transmisson.
Jungle FAULT (not OK) - flags.
Jungle - No H flyback.
Jungle - Stack overflow.
Sound Processor nacks IIC bus1 transmission.
Protection error: No V synchro.
NVM nacks IIC bus0 transmission.
Tuner nacks IIC bus1 transmission.
General IIC bus1 error (SDA1 or SCL1 are being held low.)
Protection input: X-ray protection.
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Description
Flash Timing Example : e.g. error number 3
Stby LED
ON
ON
OFF
ON
OFF