Sony KDL-32EX725 / KDL-40EX725 / KDL-55EX725 Service Manual ▷ View online
KDL-32EX725/40EX725/55EX725
47
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Is Audio
Present?
Check
HP Audio Output
No
Missing or Distorted Audio
Is Audio
Missing or Distorted
on
All Inputs?
No
Yes
Yes
Check
Speaker Resistance at
(across Speakers)
& Connections
8 ohms
&
Connections
OK?
No
Check
AU12V from Power Supply
Is
12V
Present?
Yes
Yes
Replace
Speaker(s)
No
No
Yes
Is
External Device
& connection OK
?
Repair External
Device
Check
External Device
and Connections
Swap Devices and
connections
Replace
Main Board
Replace
Power Supply
Board
Replace
Main Board
Replace
Main Board
FIGURE 5-11. AUDIO ERROR
KDL-32EX725/40EX725/55EX725
48
SECTION 5 - FLOW CHARTS AND DIAGRAMS
TV/REMOTE COMMANDER BUTTONS NOT WORKING
TV POWER
Button
not working
Replace the Harness
between Main Board to
Switch Unit
Replace
Switch Unit
Replace Harness
Switch Unit change
Replace
Main Board
OK
NG
OK
NG
FIGURE 5-12. REMOTE COMMANDER MALFUNCTIONING
KDL-32EX725/40EX725/55EX725
49
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Remote Commander
Buttons not working
Green LED light
at power indicator
OK
NG
Sensor is broken
Replace
HLR Board
Replace
Main Board
OK
NG
Mechanical
(ex. bezel)
When using the
remote commander
Green LED blinks
at power indicator
near sensor’s window
Check the Harness
between the Main Board
and the HLR Board
Replace the Harness
Replace the
HLR Board
Replace Harness
OK
NG
OK
OK
NG
NG
FIGURE 5-13. IR MALFUNCTIONING
KDL-32EX725/40EX725/55EX725
50
SECTION 5 - FLOW CHARTS AND DIAGRAMS
NETWORK NOT CONNECTING
Wired Network
on the TV
Check
Local Access
Check
Cable Connection
OK
NG
OK
NG
Check
Internet Access
Proxy setting
NG
Replace Main Board
Check Ethernet Cable
Ethernet Cable
Check IP address
and
Local router setting
Wired Set-up
IP address setting
Check Local router DHCP server
Auto
Manual
OK
NG
FIGURE 5-14. WIRELESS NETWORK MALFUNCTIONING
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