Self Diagnosis Function; Le-3A Self Diagnostic Software - Sony KF-50SX200 Service Manual

1-1. LE-3A SELF DIAGNOSTIC SOFTWARE

The identification of errors within the LE-3A 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
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 (Series of flashes which must be counted) See table 1., non fatal
errors are reported using this method.
Diagnostic Item
Description
Power does not turn on
SET 5V Dowin
No error
Not allowed (may be confused with Sircs response flash)
SET 5V Down
Lamp Cover error
Fan error
Lamp Driver error
Not used
Speaker Protection
General IIC Line 0 error
MEGATEXT (IC9502)
NVM (IC9108)
Main colour decoder (IC8301)
MCP (IC701)
Multi sound processor (IC4702)
Auto Wide (IC8700)
External RAM (IC9107)
Lamp error
Flash Timing Example : e.g. error number 3
Standby LED ON
SECTION 1

SELF DIAGNOSIS FUNCTION

No. of times Standby
LED Flashes
Power cord is not plugged in
Does not light
Fuse is Burned out
Q1606, 1607 Power FET is shorted
2 times
ERROR
ON
OFF
Probable cause Location
(G Board) Load on power line has shorted
STBY LED ERROR COUNT
Lamp LED continually on
ON
OFF
– 5 –
KF-50SX200/50SX200K/50SX200U
Detected Symptoms
Power does not come on
No power is supplied to the TV
AC power supply is faulty
Power does not come on
00
01
02
03
04
05
06
07
08
09
10
11
14
15
16
17
K
RM-905