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4-4
D isc cannot be read
.
N o
Yes
N o
Yes
N o
Yes
Yes
N o
N o
Yes
D isc cannot be read.
C heck the loaded circuit
1.C heck voltage on pin 114 of U 2 varies
betw een 0 and 3.3V:
Æ
3.3V for VC D
Æ
0V for D VD
2.C heck w hether peripheral com ponents
are eroded or defect
C heck the FFC connection
betw een 24P and the loader.
C heck U 2 and peripheral com ponents
R e-solder or replace the defective parts
C heck the connection
betw een U 2 and U 3
C orrect connection
R eplace U 2 or loader.
Yes
C heck w hether there is laser
voltage (2V for VC D and 2.2V for
D VD ) on C ollector of Q 4 &Q 5
C heck if there is R FO signal on
pin17 of C N 2. (The norm al R FO
signal is a clear reticulated w ave)
Trouble shooting chart
C heck U 2, U 3, and
peripheral com ponents are
eroded or badly soldered.
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Содержание DVP5100
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