ZS-XN30
15
15
CD SECTION
Perform all CD section check in the test mode.
HOW TO THE SET INTO CD TEST MODE
1. Press the
[POWER]
button to turn the power on.
2. Press the
x
button.
3. Set test mode by momentarily shorting both of TAP (TEST)
on the CONTROL board to enter the CD test mode.
4. Press the
u
button, and press the
x
button to enter the
STOP2 mode.
Note:
When the following figure is displayed accidentally, release from
the CD test mode and redo operation.
5. To release the CD test mode, press the
x
button, and turn the
power off.
Checking Location:
TRAVERSE CHECK
1. Connect an oscilloscope to TP (TE) and TP (VC) on the CD
board.
2. Insert the disc (PATD-012). (Part No.: 4-225-203-01)
3. In the STOP2 mode, press the
u
button to enter the FO-
CUS1 mode.
4. Confirm that the center of the oscilloscope waveform is at 0 V.
5. Confirm that the oscilloscope waveform Vp-p value is at 0.35
to 1.1 V.
FOCUS BIAS CHECK
1. Connect the oscilloscope to TP (RF) and TP (VC) on the CD
board.
2. Insert the disc (PATD-012). (Part No.: 4-225-203-01)
3. In the STOP2 mode, press the
u
button two times to enter
the ALL SERVO mode.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
•
RF signal reference waveform (eye pattern)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 200 ns
0.6 to 1.2 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
VOLT/DIV: 0.2 V (with the 10:1 probe in use)
TIME/DIV : 1 ms
0 V
Vp-p
88
LCD display:
82
LCD display:
81
LCD display:
– CONTROL Board (Conductor Side) –
TAP
(TEST)
F-
LCD display:
P-
LCD display:
– CD Board (Conductor Side) –
TP
(VC)
TP
(TE)
TP
(RF)
IC702
Checking Location:
