Sony KDL-22BX325 / KDL-32BX325 / KDL-32BX425 / KDL-40BX425 Service Manual ▷ View online
KDL-22BX325/32BX325/32BX425/40BX425
4
SAFETY CHECK-OUT
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and from all
exposed metal parts to any exposed metal part having a return to chassis, must
not exceed 0.5 mA(500 microamperes). Leakage current can be measured by
any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A.
Follow the manufacturers’ instructions to use these instructions.
2. A battery-operated AC milliampmeter. The Data Precision 245 digital
multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM or battery-
operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters
must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of passive VOMs
that are suitable. Nearly all battery-operated digital multimeters that have a
2 VAC range are suitable (see Figure A).
HOW TO FIND A GOOD EARTH GROUND
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw
on most AC outlet boxes is also at earth ground.
If the retaining screw is to be used as your earth ground, verify that it is at
ground by measuring the resistance between it and a cold-water pipe with an
ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60-to 100-watt trouble-light (not
a neon lamp) between the hot side of the receptacle and the retaining screw.
Try both slots, if necessary, to locate the hot side on the line; the lamp should
light at normal brilliance if the screw is at ground potential (see Figure B).
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
Figure B. Checking for earth ground.
KDL-22BX325/32BX325/32BX425/40BX425
5
SELF DIAGNOSIS FUNCTIONS
SELF DIAGNOSIS FUNCTION
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.
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 .
Self Diagnosis
Supported model
Number of times
Standby LED blinks Diagnostic Item
Possible Causes
Possible Location
NA
RGB_SEN
RGB Sensor ACK Error
NA
2
MAIN_POWER
Main Power
Over Voltage Protection
LIPS22 Board (KDL-22BX325 Only)
GT32 Board (KDL-32BX325/32BX425 Only)
GT40 Board (KDL-40BX425 Only)
AUD_PROT
Audio Error Detection
DC_ALERT
DTT Error
4
BALANCER
Panel Balancer Error
NA
TCON ERR
TCON Error
HFR ERR
HFR Error
P_ID_ERR
Panel ID NVM Error
PANEL_POWE
Panel Error
6
BACKLITE
Backlight Error
LCD Panel
LIPS22 Board (KDL-22BX325 Only)
GT32 Board (KDL-32BX325/32BX425 Only)
GT40 Board (KDL-40BX425 Only)
7
TEMP_ERR
Temperature Error
A Board
3
5
A Board
TCON Control MT Board
LVDS Connection
KDL-22BX325/32BX325/32BX425/40BX425
6
SELF DIAGNOSIS FUNCTIONS
STANDBY LED FLASH COUNT
Elem
(IR) Infrared
Receiver
Receiver
Picture Off/
Timer LED
Timer LED
Standby LED
Power LED
2 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
KDL-22BX325/32BX325/32BX425/40BX425
7
SELF DIAGNOSIS FUNCTIONS
VIEWING THE SELF CHECK DIAGNOSTIC LIST
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to
bring up past occurrences of a failure for confirmation on the Self Check diagnostic screen:
1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY
Channel
5
Volume
-
POWER
.
* NOTE: This differs from accessing Service Adjustments Mode (Volume +)
Back
<<
002 MAIN_POWE
001
001 indicates an error was detected
003 AUD_PORT
000
000 indicates no error was detected
003 DC_ALERT
000
004 BALANCER
000
005 TCON_ERR
000
005 HFR_ERR
000
005 P_ID_ERR
000
005 PANEL_POWE
000
006 BACKLITE
000
007 TEMP_ERR
000
00000 00010 00000
[Menu] Exit
Panel Operation Time by Hour (max 99999)
Boot Count (max 99999)
Total Operation Time by Hour (max 99999)
SELF CHECK
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