MD-S301/S301W
– 34 –
• "Check in TEST mode"
Is the optical pickup moved to outer/inner periphery when
the button is pressed?
No
Does the spindle motor rotate at the same step?
Check as stated in "Spindle motor fails to rotate"
No
Yes
Is focus servo applied in TCRS ATT set step?
No
Does spindle motor rotate at high speed at the same step?
No
Yes
Is tracking servo applied at low-reflection A-ATT/B-ATT set
step?
No
Yes
Check waveform of pins 20 and 21 of IC201, pins 6, 8, 15 and
16 of IC601, pins 19 and 21 of CN101.
Is slide servo applied at continuous playback step?
No
Yes
After once performing the automatic adjustment in the AUTO2 MODE, using the low-reflection disc, and then check in MANUAL1
or 2 mode.
Waveform of EFM (TP201), FEOUT (TP208), and TEOUT (TP210) are observed at the same time.
Check the pins 22 of IC201, pins 2 to 7 of IC401, pins 10 to 13 of
CN601, and sled motor terminal.
Check timing of pins 17 and 18 of TP210(TEMON), IC401.
Check EFM waveform of pin 3 of IC201 (high-reflection).
Check ADIP waveform of pin 11 of IC201 (low reflection).
Is the MANUAL1 mode A signal toF signal measurement within
allowable range?
Check Vref value of pins 5 and 6 of IC101.
No
Yes
Yes
Is laser power normal when laser lights in MANUAL 2 mode?
No
Check TP108, TP109, CN101 8 and 9, IC401 60 and 34, Q101
periphery and pickup flex.
Yes
Is there focus access in A-ATT/B-ATT set step?
No
Check the pins 18 and 19 of IC201, pins 11, 13, 17 and 18 of
IC601, pins 20 and 22 of CN101.
Yes
Yes
Is adjustment value within allowable range?
Check whether the button causes variation on the
pins 5 and 8 of IC201 and the pins 75 of IC101 (TP208).
No
Is E-ATT/F-ATT setting within allowable range in the groove
section E-ATT/F-ATT set step?
Check whether IC201 pin 6 and 9 TP210 (TEMON) is variable
with the button or perform the DC test.
No
Yes
Replace IC401.
Check waveform of pins 40 to 45 of IC101 and pins 3 of IC201.
(In case of low reflection check also the waveform of pin 11 of
IC201.)
No
Is cluster address value counted up continuously at the
same step?
Check as stated in "Normal playback"
Yes
Yes
Note)
As output of FEOUT (TP208) and TEOUT (TP210) is PWM
output, observe the waveform through the LPF as shown in
Figure 34.
Oscilloscope
TP208
TP210
100K
100P
Figure 34
Summary of Contents for MD-S301
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