3.TRACKING BALANCE CHECK
1) Connect the TE and Vref to the oscilloscope.
2) Playback the second track of TCD-782 and press the PAUSE butt
o
n.
3) Check that the t
r
averse waveforms of oscilloscope are up and down symmetrical.
4. PLAY ABILITY CHECK
1) Play back the 3
rd
, 8
th
and 13
th
track of ATD-001. Check that the noise does not occur sound skipping does not
occur.
5.LASER CURRENT CHECK
*Do not perform this measurement unless the laser is suspected to be defective.
1) Connect digital multi-meter across the resistor R8
A
(3.3ohm).
2) Play back the TCD-782 and check the DC voltage value on the digital multi-meter.
3) Calculate the laser current (Iop) by dividing the DC voltage across R8
A
by the
resistor value (R8
A
= 3.3ohm).
Check that the laser current (Iop) is SPEC value
±
10%.
V
DIGITAL MULTIMETER
R8
A
R8
A
OUTPUT
OSCILLOSCOPE
TE
Vref
EXAMPLE
KSS-213F
05Y93
DA372
37.2mA
SPEC VALUE
VOLT / DIV: 100mV
TIME / DIV: 1ms
A
B
0V
A = B
–
56
–
d u
p a
t o
r
Summary of Contents for XR-EM52
Page 31: ... 31 SCHEMATIC DIAGRAM 4 TUNER d u p a t o r ...
Page 38: ... 38 IC BLOCK DIAGRAM d u p a t o r ...
Page 39: ... 39 d u p a t o r ...
Page 46: ... 46 VOLTAGE CHART d u p a t o r ...
Page 47: ... 47 d u p a t o r ...
Page 48: ... 48 d u p a t o r ...
Page 65: ... 65 CD MECHANISM EXPLODED VIEW 2 2 3ZG 2 A 3 6 2 5 1 9 10 4 7 8 d u p a t o r ...
