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Service Guide Model No : SP-i300
Attention
Please follow the numbered sequence marked within parenthesis given in individual Flow
chat, in that this is the best-recommended sequence to rectify the problems.
1.1 Speaker no sound (Line in jack no function)
Problem
Analyze
and
Identify
Cause
Solution
Speaker no sound
Component cold
solder or Short
Circuit
Defective U2, U5,
U9
Speaker cable disconnect,
USBJack1, J2 defective
or speaker damaged
Check solder
point on PCBA
Check and
Replace defective
IC
Reconnect speaker cable or
replace defective speaker
driver and component
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