Technics SL-EH760 Service Manual page 34

FL Symptom
error
code /
display
E01 Focus and
tracking
offset
adjustments
not
completed in
the specified
time period.
E03, Disc play
E05, unstable.
E07,
E09,
E0B,
E0D,
E0F
Probable cause
Clocks X1 IN and X2 OUT,
power supply V and reset/
DD
RST, all on IC702.
MDATA, MCLK, MLD and SENSE
signals to/from mechanism
controller.
Scratches or contaminants on
disc surface.
Focus and Tracking servo
circuit (check waveforms,
voltages and part values.)
Spindle driver circuit.
Optical pickup.
Signal to check
Signal
name
MDATA IC702-8 pin
MCLK IC702-7 pin
MLD IC702-9 pin
SENSE
/RST
X1 IN
X2 OUT IC702-59
FE
TE
FOD
TRD
KICK
/FLOCK IC702-11
/RFDET IC702-38
RF
STAT
34
Normal voltage
waveform values
Location PLAY
0V
IC702-10 -
pin
IC702-18 3.4 V
pin
IC702-58
pin
pin
IC702-32
pin
IC702-33
pin
IC702-28 1.7 V
pin
IC702-27 1.7 V
pin
IC702-26 -
pin
-
pin
0 V
pin
TJ701
IC702-17 3.3 V
pin
STOP
3.4
3.4
3.4
1.7
1.7
1.7
1.7
3.3
1.0