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AKAI AFT-505 (5" TFT LCD COLOR TV) Service Manual
5、Fault Description: No Sound, No LCD Illuminant.
NO
Check power supply
circuitry
Subject to change without notice.
Start
Does it supply 12VDC
power correctly.
Check whether Q7 E side
has 12V voltage.
Check IC U2 (17) plug has
NO
+5V output
Check whether IC
U2 (22) plug has
+5V power supply
YES
Check and replace
IC U2
YES
YES
YES
YES
Check whether Q7 C
side has 12V power
supply
YES
Check T2, U5
applicative
circuitry
NO
Check the power jack
& fuse F1
NO
Crystal pipe Q7
damaged
Page 5 of 5
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