Technics SL-HD550

FL
error
code
display
Symptom Probable cause Signal to check Normal voltage and
waveform values
Signal
name
Location PLAY STOP
E01
Focus and
tracking
offset
adjustments
not
completed in
the specified
time period.
Clocks X1 IN and X2 OUT,
power supply V
DD
and reset/
RST, all on IC702.
MDATA, MCLK and MLD
signals to/from IC201.
MDATA IC702-pin 8 0 V
MCLK IC702-pin 7 3.3 V
MLD IC702-pin 9 3.3 V
/RST IC702-pin
18
3.3 V 3.3 V
X1 IN IC702-pin
58
X2 OUT IC702-pin
59
E02,
E04,
E06,
E0A,
E0C,
E0E
Disc play
unstable.
Scratches or contaminants on
disc surface.
Focus and Tracking servo
circuits. (check waveforms,
voltages and part values.)
Spindle driver circuit.
Optical pickup.
FE IC702-pin
32
1.7 V
TE IC702-pin
33
1.7 V
FOD IC702-pin
28
1.7 V 1.7 V
TRD IC702-pin
27
1.7 V 1.7 V
/RFDET IC702-pin
38
0 V 3.3 V
RF TJ701 1.0 V
STAT IC702-pin
17
3.3 V 0 V
FBAL IC702-pin
30
1.7 V 1.7 V