Sony Ericsson CDP-XE570 - Manual (Page 10)

10
CDP-XE570
Procedure :
1.
Connect oscilloscpe to test point TP (TE1) and TP (VC) on
BD BOARD.
2. Turn Power switch on.
3. Put disc (PATD-012) in to play the number five track.
4. Press the X (Pause) button. (Becomes the 1 track jump mode)
5. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
E-F Balance Check
Procedure :
1.
Connect the test point TP1 (ADJ) on DISPLAY BOARD to
the ground with a lead wire on main board.
2. Connect oscilloscpe to test point TP (TE1) and TP (VC) on
BD BOARD.
3. Turn the Power switch on to set the ADJ mode.
4. Put disc (PATD-012) in to play the number five track.
5. Press the [TIME/TEXT] button. (The tracking servo are turned
OFF.)
6. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse waveform
oscilloscope
BD board
TP (TE1)
TP (VC)
0V
level : 1.15 ± 0.5 Vp-p
A (DC voltage)
Center of the waveform
B
0V
C (DC
voltage)
Tracking servo
OFF
Tracking servo
ON
SECTION 5
ELECTRICAL BLOCK CHECKING
Note:
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use PATD-012 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M Ω impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.35 ± 0.4 Vp-p
oscilloscope
BD board
TP (TE1)
TP (VC)
0V
level : 1.15 ± 0.5Vp-p
A (DC voltage)
Center of the waveform
B
symmetry RF Level Check
oscilloscope
BD board
TP (RF AC)
TP (VC)
Procedure :
1.
Connect oscilloscope to test point TP (RF AC) and TP (VC) on
BD BOARD.
2. Connect the test point TP1 (ADJ) on DISPLAY BOARD to the
ground with a lead wire.
3. Turn Power switch on.
4. Put disc (PATD-012) in to play the number five track.
5. Press the [CLEAR] buton and select the RFCK function.
6. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note:
A clear RF signal waveform means that the shape “
◊ ” can be clearly
distinguished at the center of the waveform.
RF signal waveform
E-F Balance (1 Track Jump) Check
1 track jump waveform
7. Press the [TIME/TEXT] button. (The tracking servo are turned
ON.) Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 6.
Traverse waveform
8. Disconnect the lead wire of TP1 (ADJ) connected in step 1.