Sony KV-28DX30U Service Manual ▷ View online
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BE-3E SELF DIAGNOSTIC SOFTWARE
The errors indicated below can be read using an Error Reader Display (Part Number S-188-900-10) connected to the service connector. Once an
error has been detected it will then be displayed on the two digit error reader. During the power up procedure and during normal run time, the micro’s
self diagnostic procedures monitor for various errors. Errors displayed refer to the table indicated below.
error has been detected it will then be displayed on the two digit error reader. During the power up procedure and during normal run time, the micro’s
self diagnostic procedures monitor for various errors. Errors displayed refer to the table indicated below.
6
Once every main loop (approximately 200ms OSD mode, 50ms text or menu mode), the micro checks the protection pin (pin 66). If the protection
pin is high 6 successive times, a protection error is diagnosed. The protection pin is not checked during the first 3 - 4 seconds after AC on.
If this error is diagnosed, the respective NVM register will be updated and the set goes straight into diagnostic standby with 2 flashes - no reset is
attempted.
pin is high 6 successive times, a protection error is diagnosed. The protection pin is not checked during the first 3 - 4 seconds after AC on.
If this error is diagnosed, the respective NVM register will be updated and the set goes straight into diagnostic standby with 2 flashes - no reset is
attempted.
Protection Error
AKB Error (Error 5)
Time /seconds
0
10
20
30
40
50
60
70
80
90
100
A
B
C
D
E
F
A.
IKR Return first goes high after 12 seconds
B.
Micro begins checking IKR Return status 20 seconds after power on
C.
Micro detects IKR return=0
D.
Micro detects that IKR has been 0 for 10 seconds; NVM counter is incremented and the LED
starts flashing (flashes 5 times, off for 2 seconds, flashes 5 times, etc.)
starts flashing (flashes 5 times, off for 2 seconds, flashes 5 times, etc.)
E.
Micro detects that IKR=1; LED continues to flash
F.
Micro detects that IKR has been high for 10 seconds; LED stops flashing.
IKR
Return
Once every main loop the micro checks the AKB stability by reading the IKR return from the Jungle IC. IKR=1 means that the AKB is stable,
IKR=0 means that the AKB is unstable. If the AKB status is unstable for 10 seconds, an AKB error is diagnosed. AKB stability is not checked
during the first 20 seconds after AC switch on.
If this error is diagnosed, the respective NVM register will be updated and the response LED will flash 5 times continually, but the set will not go
into standby mode. If the AKB status becomes stable, and remains stable for 10 seconds, the LED will stop flashing.
IKR=0 means that the AKB is unstable. If the AKB status is unstable for 10 seconds, an AKB error is diagnosed. AKB stability is not checked
during the first 20 seconds after AC switch on.
If this error is diagnosed, the respective NVM register will be updated and the response LED will flash 5 times continually, but the set will not go
into standby mode. If the AKB status becomes stable, and remains stable for 10 seconds, the LED will stop flashing.
If any of these errors are detected, the respective NVM register will be incremented. The software will then carry on with the power up sequence.
Startup Diagnostic Errors (Error 6-18, 27, 29-32)
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7
General IIC Device Run-time Errors (Errors 19-23)
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If any of these errors are detected, the respective NVM register will be incremented and the software will carry on.
In the case of these errors, the ‘device reset’ pin will be held low for 60ms, causing a hardware reset of Compact Text. Following this reset, a longer
timeout will be allowed for the M3L bus to recover. If the error still exists, the NVM register will be incremented and the software will carry on.
timeout will be allowed for the M3L bus to recover. If the error still exists, the NVM register will be incremented and the software will carry on.
In the case, the ‘device reset’ pin will be held low for 60ms, causing a hardware reset of Compact Text. Compact Text will then be re-initialised and
the NVM counter updated. This is the same as for errors 26, 28 and 33 except that the M3L bus timeout is not changed.
the NVM counter updated. This is the same as for errors 26, 28 and 33 except that the M3L bus timeout is not changed.
For both these errors, the software will refresh the MSP and DSP registers. If the errors still exist, the NVM counter will be incremented, and the
software will carry on.
software will carry on.
Compact Text Run-time Errors (Errors 26, 28, 33 & 34)
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ERROR DISPLAY MODE
Current Error Code = 00
Error Code
Occurrences
Error Code
Occurrences
2
2
19
0
3
--
20
0
4
--
21
0
5
0
22
0
6
0
23
0
7
0
24
0
8
0
25
4
9
0
26
5
10
0
27
89
11
0
28
3
12
0
29
0
13
0
30
0
14
0
31
0
15
3
32
0
16
0
33
3
17
0
34
38
18
6
Error Display Mode
Error Display Mode is entered by the following sequence of commands :
Standby -> Information -> Digit 5 -> Volume Down -> TV
This mode will display a special menu, which will list all possible errors and the number of occurrances of each error (0 - 255, as stored in the
NVM). There will also be a display of the current error (00 if no error). This display mode will appear as follows :
NVM). There will also be a display of the current error (00 if no error). This display mode will appear as follows :
Whilst in this mode, the number of occurences of each error can be reset to 0 by following sequence of Sircs commands: Digit 8 -> Digit 0.
‘TT08’ will also reset this NVM data.
‘TT08’ will also reset this NVM data.
This mode can only be exited by switching off the TV.
The Current Error Code can also be read by using a TV Error Reader (IIC slave address 42H). This device simply receives 1 data byte, which is the
error number in binary coded decimal form.
error number in binary coded decimal form.
Click on the first or last page to see other KV-28DX30U service manuals if exist.