Sony KDL-40EX520 Service Manual page 50

SECTION 5 - FLOW CHARTS AND DIAGRAMS
Missing or Distorted Audio
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523
Is Audio
No
Missing or Distorted
on All Inputs?
Yes
Check
HP Audio Output
No
Is Audio Replace
Present? Main Board
Yes
Check
AU12V from Power Supply
Replace
No
Is 12V
Power Supply
Present?
Board
Yes
FIGURE 5-6. NO AUDIO FLOWCHART
Check External Device
and Connections External Device
Swap Devices and & connection
connections
Repair External
Check
Speaker Resistance at
(across Speakers)
& Connections
8 ohms
Connections
Replace
Main Board
Is
Yes
Replace
Main Board
OK?
No
Device
No
& Replace
Speaker(s)
OK?
Yes
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