Sony KDL-22EX425 / KDL-32EX425 / KDL-32EX525 / KDL-40EX525 / KDL-46EX525 Service Manual ▷ View online
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 28
OVERVIEW
This chapter provides information regarding the Self Diagnosis
feature in our TVs.
UPDATING THE SOFTWARE
As mentioned in
“Section 2 - Software Requirements” on page 14
there
are several issues that may be resolved by updating the software
to the latest version. For a list of possible correctable issues see
“Examples of Software Correctable Symptoms” on page 16
.
SECTION 4 - TROUBLESHOOTING
Self Diagnosis
Supported model
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 29
SECTION 4 - TROUBLESHOOTING
TRIAGE CHART
Use the Triage Chart to determine what may possibly be causing the error before going out to the customers location.
Before you make the service call…
1. Confirm the symptom from the customer.
Chassis:
AZ2F
2. Select that symptom from the chart.
3. Bring
3. Bring
ONLY THE MOST LIKELY PART
for that symptom.
4. Follow the troubleshooting charts in the technical guides to isolate the board.
RED DOT: Most likely defective part
LAST UPDATED:
6/9/2011
Remote
Audio
2
3
4
5
6
*7
8
Green LED Blinking
Constantly ON/OFF
Cycling
Green LED
Constant ON
No Green
Power LED
(Dead Set)
No video
Whole
Screen
Distortion
Isolated
area
Distortion
No Remote
No Audio
MAIN BOARD
▲
▲
POWER BOARD
HLR2 BOARD
Service Bulletin
Software Update
TCON Board
▲
▲
LCD Panel
Problem
POWER
AUDIO/
POWER
BACK-
LIGHT
TCON
BACK-
LIGHT
TEMP
WDT
* ONLY IF 7X SHUTDOWN OCCURS IMMEDIATLEY
Reference
5. Chart Color Code
BLUE TRIANGLE: Secondary possible defective part
Video
Symptoms - Shutdown. Power LED
blinking red diagnostics sequences
No
Power
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 30
SECTION 4 - TROUBLESHOOTING
PROTECTION SHUTDOWN
Self Diagnosis
Supported model
Critical voltages and circuit operations are monitored by the CPU
on the Main Board. If a fault is detected the Self-Diagnostic function
in the TV will force the TV to shut down by the CPU. The monitored
circuit in which the fault occurred will cause the CPU to flash the
standby LED in groups of repeating sequences. The number of
blinks in these groups identifies which voltage or circuit caused the
protection event.
Not all of the available protect codes are used in every model.
Not all of the available protect codes are used in every model.
For example, models that are LED backlit do not use the 4-blink
balancer error as this circuit is found in models that are backlight
with fluorescent lamps. The 4-blink error is however, used to identify
an issue with the LD Board for models that contain a LD Board.
The information in this section contains the protect circuits and
diagnostics codes used in the models listed in this manual.
“Figure
4-3. Diagnostic Table” on page 28
provides guidance in locating
the possible component causing the shutdown.
STANDBY LED FLASH COUNT
Ambient Sensor/
(IR) Infrared Receiver
Picture Off /
Timer LED
Standby LED
Power LED
FIGURE 4-1. LED DISPLAY
2 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
FIGURE 4-2. BLINK COUNT
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