SELF DIAGNOSTIC FUNCTION
The identification of errors
within the AE-5A chassis is triggered in one of two ways :- 1: Busy or 2:
Device failure to respond to IIC. 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
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.
Diagnostic Item
Description
|
No of times Standby
LED Flashes
|
Probable cause
Location
|
Detected Symptoms
|
Power does not turn on
|
Does not light
|
·
Power
cord is not plugged in.
|
Power does not come on
·
No
power is supplied to the TV
|
+B Overcurrent (OCP)
|
2 times
|
·
H.OUT
(Q6803/6804) is shorted. (D Board)
·
Linearity
FET (Q6806) is shorted. (D Board)
|
·
Power
does not come on
|
Vertical Deflection stopped
|
4 times
|
·
+15V
is not supplied R6835 open (D Board)
·
-15V
is not supplied R6834 open (D Board)
|
·
Vertical
deflection pulse has stopped
|
LED BLINKING CODES
No error 00
Reserved 01
OCP ( Over Current Protection )
02
OVP ( Over Voltage Protection )
03
Vertical Protection 04
Unstable AKB (check starts after
30's, enable TT61
disable TT62)
05
Horizontal Protection 06
Speaker Protection 07
I2C bus 0 error 08
M-B Tele-Text-Decoder 09
M-B ST24C32, NVM 10
J-B TDA9320, Main Colour Decoder
11
B1/B2-B Feature Box 12
B1-B D/A-Converter 13
E-B Backend 14
J-B MSP3410D, Sound Processor 15
J-B CXD2057, Auto Wide 16
External RAM 17
ERROR READER DISPLAY
The error reader display is
connected to the service connector to read actual error codes. The part number
for the error reader display is S-188-900-10.
Once an error has been detected
it will then be displayed on the two digit error reader. The errors displayed
refer to the following table.
000h No error occurred
001h Bus error, IIC0
002h Bus error, IIC1
100h A-Board
101h A-B CXA1875, Port Expander
102h A-B TU1326, Main Tuner
103h A-B TU1350, Sub Tuner
200h B1-Board
201h B1-B P83C654, Feature Box
B1-B. SDA9280, D/A Convertor
202h B1-B P83C654, Feature Box
B1-B. SDA9280, D/A Convertor
300h B2-Board
301h B2-B. SAA4977, BESIC
302h B2-B. SAA495X, Field Memory
400h B3-Board
401h B3-B. MID-X
402h B3-B. Panorama
403h B3-B. DRC
404h BK-B. Picture Booster
500h D1-Board
501h D1-B CXA8070, Dynamic Convertor
502h D1-B CXA1875, Port Expander
600h E-Board
601h E-B CXD2100, Backend
700h J-Board
701h J-B CXD2057, Auto Wide
702h J-B SDA9288, PIP
703h J-B TDA9320, Sub Colour
Decoder
704h J-B TDA9320, Main Colour
Decoder
705h J-B CXA1875, Sub-Sound
706h J-B TDA7309, HP-Amplifier
707h J-B TEA6422DT, Audio Switch
708h J-B MSP3410D, Sound
Processor
709h J-B TC9337F, Sound DSP
70Ah J-B CXA21X69, AV Switch
800h M-Board
801h M-B ST24C32, NVM
ERROR DETECTION MONITOR
Device acknowledge is used to
check IIC errors. Device acknowledge is checked by sending an IIC start
sequence during CRT power on. Each device is checked three times, if there is
no acknowledge after each attempt, it will be regarded as an error. There are three steps to check for errors.
- IIC line 0: If all devices except the NVM have errors, IIC line 0 error is displayed.
- Board check: If all devices mounted on one board have errors, board error is displayed.
- Each device check: If IIC line error and board error are not detected then the device with the error is displayed.
THE DETECTED ERRORS CAN BE DISPLAYED AS FOLLOWS
- Error Monitor Menu.
- Error Reader
