-45-
OUTP UT
ns
OS CIL LO SCOP E
JITTE R METE R
INPUT
RF
GND
V
DIG ITAL MULTIMETER
R504
R504
ELECTRICAL ADJUSTMENT -5/5
<CD AAdjustment>
• Adjust and check at test mode.
• Keep at a level CD Mechanism.
• Equipment
Measure: Oscilloscope (using probe 10:1)
Digital Multimeter (using at DCV range)
Jitter Meter (KIKUSUI 6235)
Test Disc: TCD-782/ATD-001
1. RF Waveform Check
1) Connect the Oscilloscope to Test Point (RF+) and (GND).
2) Play second track of TCD-782.
3) Check that the amplitude of RF waveform is maximum, and that the lozenge
of center appear clearly.
2. Jitter Check
1) Keeping on connecting Oscilloscope to 2, connect the output pin of
Oscilloscope to the input pin of Jitter Meter.
2) Tune the knob of Oscilloscope voltage range at less than 500 mV.
3) Play second track of TCD-782.
4) Check that the display of Jitter Meter is as less than 28.0 nS.
3. Play Ability Check
1) Play track 3, 8, 13 of ATD-001, and check playing makes any noise or sound jump.
4. Lasor Current Check
* Don’t do this check except if the Lasor is fault.
1) Connect the Multimeter to both side of R504 (4.7
Ω
)
2) Play TCD-782, and check the DC voltage value of the Multimeter.
3) Check that the Lasor current (Iop = DC voltage value devided by R504 (4.7
Ω
))
is less than 80 mA.
IC601
IC501
IC505
VC
FE
TE
RF
R515
1
2
1 2
4
CD C.B (PATTERN SIDE)
VOLT / DIV: 500mV
TIME / DIV: 0.2 s
EYE PATTERN
must be CLEAR and MAX
Approx.
1.8 0.3Vp.p
OUTP UT
OS CIL LO SCOP E
RF
GND
