Self Diagnosis Function - Sony KLV-40S400A Service Manual

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem.
A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user's knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to
reveal past problems and how often these problems occur.
1-1. DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash a set number of times to indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a "0", no error has occurred .
Number of times
STANDY LED
(Red) flashes
2 times
3 times
4 times
5 times
6 times
7 times
8 times
9 times
10 times
11 times
12 times
13 times
14 times
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SELF DIAGNOSIS FUNCTION

Monitoring Items
D
(Screen Display) (S
hes
DC DC_DET C C C _D _D _D _D _D _D D D D D ET ET T ET E T ET ET E ET ET
DC_ALERT 1 DC_A A A A LE LE LE LE LE E E E E RT RT RT RT RT RT RT RT RT T 1 1 1 1 1 1 1
DC_ALERT 2 LER ER ER ER R R R R R T T T T T T T T T 2 2 2 2 2 2 2 2 2
DC_ALERT 3
BACKLIGHT/INVERTER ERROR
INTERNAL TEMP ERROR
AUDIO ERROR
FAN ERROR
DEF ERROR
NVM ERROR
IIC ERROR
BALANCER ERROR
HDMI ERROR
Diagnostic Item Description
Power supply voltage error
Confirm the voltage at F7016 is about 3.3V and F7016 is not
open.
Confirm the voltage at F7015 is about 5V and F7015 is not
open.
Confirm the voltage at F7017 is about 1.8V and F7017 is not
open.
Confirm the voltage at C7110 is about 5.5V and F7012 is not
open. (Only applicable for AM series) op
C C C C C C C C Confirm if F7003 is open. C o o o o o on f
Co C Co Co Co Co Co Co Co Confirm voltage at either pin 5, 6, 7 or 8 of IC7009 is the Co nf nf nf nf nfir nf nf nf nf i ir ir ir ir m
fo fo fo following: fo fo fo fo fo fo o l l ll ll ll ll ll low l ow ow ow o o o w o o w w in in in in n n n n g: g g g g g
12V 12 2 V V V V V V
OR R R R R R R R R R C C C C C C C C C o C Confirm if input to Q9008 is about 3.3V. nf f f f i i i r i r r rm m m m m m m m m i f if if if i if f f i i i i i i i i nput np np np np np np np np np u u u u u u to
I If internal temperature of the LCD set increases over 70°C I I I I I I I I I f f f f f f f in in n n n n te te te te te ternal al al al al al al l t t t t t t t t t empe em em em em em em em em m p p pe pe pe pe pe pe pe ra ra r r ra ra r a ratu
it will shut down and the set goes to standby. it t t w w w w w w w w w i i l il i i i i il l sh sh sh shut d h h d d d d d d ow ow ow o ow o ow ow n n n n n n n n n n a a n a a a n an a d d d d
Confirm the correct value at AU_13V, AU_12V (=10V). nf f f ir ir r r r r r m m m m m m m m m th the th th h th th th th th e e e e e e e corr rr r rr r ect e c e e ec t t t va va va
Confirm the speaker is OK, speaker terminal is not shorted to m m m th t th th t th th th th he e e e e e e e sp sp sp sp sp sp speake sp sp p k k k ke ke ke ke er r r
GND.
Change IC2007 to a new one. 007 00 00 7 7 7 7 7 to to o o o o o o o a a a a a a a
Fan error.
Digital EF circuit error. ror.
NVM is broken.
No power supply to NVM.
No communication between IC9000 and IC3000.
Confirm if input to Q9009 is about 3.3V.
-
the
a a a a a a lu lu lu lu u lu lu u u u e a
is is is is is is O O O O O O O O K K, K, sp
new o o o o o o o o o o n n n ne n e n ne ne ne .
IC90
KLV-20/32/37/40S400A (CH) 6