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C
Audio feature verification.
Plug AV-Cable in
Line out
function normal?
YES
Speaker out
normal?
YES
Plug headphone in
YES
Headphone
out normal?
YES
D
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Only for training and service purposes
NO
1. Check mute
control signal.
NO
2. Check U12 setting. Pin15-
Shutdown, Pin21-Volume,
Pin22-HP/LINE,
Pine23-SE/BTL
YES
1. Check earphone
NO
peripheral circuit.
2. Check U12 setting.
Pin22-HP/LINE,
Pine23-SE/BTL
YES
Check 8202T
DAC out
YES
NO
Check Audio
peripheral circuit
YES
NO
Check Jack,
connector
YES
Check cable
3-7
1. Check audio
NO
relate circuit of
main chip.
2. Check Main chip.
NO
Check
component value.
NO
Check open,
short, direction,
pin define.
LGE Internal Use Only
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