NO
YES
YES
YES
NO
NO
YES
YES
YES NO
Do not read disc
Check if the
laser
head has feed action.
Check if the feed control
input of BA5954 Pin 23 is
1.4V?
Check if BA5954 pin 17,18
have 2.5V voltage output?
Check if BA5854 and the power
supply 5V are in working order?
Check if the
connection from
BA5954 to MT1389
is open circuit
?
Check feed motor
and its connection.
Check if laser head
has focus action?
Check
if BA5954 pin 1
has
focus control
voltage input of 1.4V.
Check if the
connection from
BA5954 to MT1389
is open circuit?
Check if the
voltage output of
BA5954 pin 13 and 14 are
2.5V?
Check focus coil and its
connection.
Check if BA5854 and 5V power
supply are in working order?
