Ef Balance; Rf Level - Sony CDL1100 Service Manual

6-3-4-12. EF Balance

Note:
• Before performing electrical block checks, solder a lead wire to
TP RF (CL428), TP VC (CL403), and TP TE (CL407) of the MA-
C22 board.
• Chuck the disk (YEDS-18) beforehand.
• Refer to 6-3-4-1. and set the test mode.
• Insert a SONY test disc (YEDS-18) into the test drive.
1. Connect the oscilloscope to TP TE (CL407) and TP VC (CL403)
of the MA-C22 board.
2. Set the COMMAND SW of the controller to INITIALIZE and
press the TEST button.
ID2 ID1 ID0 PARITY
L L L
3. Set the COMMAND SW of the controller to x1 speed, and press
the TEST button.
ID2 ID1 ID0 PARITY
L L L H
4. Set the COMMAND SW of the controller to Play Audio (23'47"),
and press the TEST button.
ID2 ID1 ID0 PARITY
L H L H
5. Set the COMMAND SW of the controller to tracking off, and
press the TEST button.
ID2 ID1 ID0 PARITY
H L L
6. The oscilloscope waveform should be symmetrical at the top and
bottom in respect to 0V (VC).
Check that the DC voltage A is within ±0.125V from 0V (VC).
0V (VC)
7. After adjusting, set the COMMAND SW of the controller to track-
ing on, and press the TEST button.
ID2 ID1 ID0 PARITY
L H H H
L
L
Center of the waveform
A (DC voltage)

6-3-4-13. RF Level

Note:
• Before performing electrical block checks, solder a lead wire to
TP RF (CL428), TP VC (CL403), and TP TE (CL407) of the MA-
C22 board.
• Chuck the disk (YEDS-18) beforehand.
• Refer to 6-3-4-1. and set the test mode.
1. Connect the oscilloscope to TP RF (CL428) and TP VC (CL403)
of the MA-C22 board.
2. Set the COMMAND SW of the controller to INITIALIZE and
press the TEST button.
ID2 ID1 ID0
L L L
3. Set the COMMAND SW of the controller to x1 speed, and press
the TEST button.
ID2 ID1 ID0
L L L
4. Set the COMMAND SW of the controller to Play Audio (23' 47"),
and press the TEST button.
ID2 ID1 ID0
L H L
5. Check that the oscilloscope waveform is clear, and the RF level is
proper.
* A clear RF signal waveform is as follows.
to CNJ202
White
to CNJ202
Red
H
L
COMMAND SW (SW1)
TEST (SW2)
6-18
PARITY
L
PARITY
H
PARITY
H
level : 0.9V ~1.6 V
(RF Level Specification)
to CN56
UNCHUCK
(RED)
D1
EJECT (SW3)
CHUCK
(GREEN)
D2