– 22 –
Disc Sensor Adjustment
Perform this adjustment after completing all adjustments of the
mechanism section.
If not performed accurately, the presence of the disc may not be
detected properly.
Connection 1:
Waveform 1:
Connection 2:
Waveform 2
Procedure:
1. Connect the oscilloscope to Pins
1
,
2
, and
4
of CN506 of the
MAIN board. Also connect a 1 k
Ω
resistor to Pin
4
at the same
time. (Connection 1)
2. Check that no discs are loaded in the unit.
3. With the power OFF, press the
1/u
button while pressing the
INPUT button, and turn on the power at the same time.
4. The rotary table will continue rotating in the clockwise direction.
5. Observe the waveform at that time on the oscilloscope.
6. Loosen the screw securing the D.SENS (LUMINOUS) board
slightly.
7. Slide the D.SENS (LUMINOUS) board to the left and right so
that the peak of the D0 waveform is at the center between the
descending point of the T1 waveform and ascending point of the
T2 waveform. (Waveform 1) After adjusting, apply locking
compound.
8. Disconnect the resistor connected to Pin
4
of CN506 of the
MAIN board. (Connection 2)
9. Observe the waveform on the oscilloscope. (Waveform 2)
10. Adjust RV501 of the MAIN board so that the waveform on the
oscilloscope satisfies the following adjustment value 1.
11. Press the
1/u
button and turn OFF the power.
12. Press the
1/u
button, turn on the power, press the OPEN/
CLOSE button, and open the front cover. Next rotate the DISC/
CHARACTER dial in the counterclockwise direction
continuously so that the rotary table rotates continuously in the
counterclockwise direction.
13. Observe the waveform on the oscilloscope and confirm that it
satisfies the adjustment value 2 (waveform 3). If it does not,
adjust RV501 of the MAIN board.
Waveform 3:
CN506 of MAIN board
T1 : Pin
1
(TS. 1)
T2 : Pin
2
(TS. 2)
D0 : Pin
4
(D. SENS)
oscilloscope
1 k
Ω
A
B
T1
T2
D0
CN506 of MAIN board
T1 : Pin
1
(TS. 1)
T2 : Pin
2
(TS. 2)
D1 : Pin
4
(D. SENS)
oscilloscope
X
Z
Y
T1
T2
D1
D.SENS (LUMINOUS) board
X
Z
Y
T1
T2
D1
Содержание CDP-CX260 - 200 Disc Cd Changer
Страница 7: ... 7 This section is extracted from instruction manual ...
Страница 8: ... 8 ...
Страница 31: ...6 4 PRINTED WIRING BOARD BD SECTION See page 24 for Circuit Boards Location 33 ...
Страница 32: ... 34 CDP CX260 Page 36 ...
Страница 36: ... 41 42 CDP CX260 6 8 PRINTED WIRING BOARD JACK SECTION See page 24 for Circuit Boards Location Page 35 Page 36 ...
Страница 37: ... 43 44 CDP CX260 6 9 SCHEMATIC DIAGRAM DISPLAY SECTION See page 51 for IC Block Diagrams Page 37 ...
Страница 39: ... 47 CDP CX260 6 11 SCHEMATIC DIAGRAM SENSOR MOTOR SECTION Page 37 Page 37 Page 37 Page 37 Page 37 ...