50
7. After checking, set the COMMAND SW of the controller to
tracking on, and press the TEST button.
5-2-4-11. EF Balance
Note:
•
Before performing electrical block checks, solder a lead wire to
TP RF EQ, TP VC, and TP TE of the MA-C30 board.
•
Chuck the disk (YEDS-18) beforehand.
•
Refer to 5-2-4-1. and set the test mode.
•
Insert a SONY test disc (YEDS-18) into the test drive.
•
Press the OPEN button to open the door, place the disc in the
slot in front, close the door to chuck the disc.
1. Connect the oscilloscope to TP TE and TP VC of the MA-C30
board.
2. Set the COMMAND SW of the controller to INITIALIZE and
press the TEST button.
ID2
ON
ID1
ON
ID0
ON
PARITY
ON
3. Set the COMMAND SW of the controller to x1 speed, and press
the TEST button.
ID2
ON
ID1
ON
ID0
OFF
PARITY
ON
4. Set the COMMAND SW of the controller to Play Audio (23’47”),
and press the TEST button.
ID2
OFF
ID1
OFF
ID0
ON
PARITY
ON
5. Set the COMMAND SW of the controller to tracking off, and
press the TEST button.
ID2
ON
ID1
ON
ID0
OFF
PARITY
OFF
6. Check the level B of the oscilloscope’s waveform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following:
• A/B x 100 = less than ±22 (%)
ID2
ON
ID1
ON
ID0
ON
PARITY
OFF
5-2-4-12. RF Level
Note:
•
Before performing electrical block checks, solder a lead wire to
TP RFEQ and TP VC of the MA-C30 board.
•
Chuck the disk (YEDS-18) beforehand.
•
Refer to 5-2-4-1. and set the test mode.
•
Press the OPEN button to open the door, place the disc in the
slot in front, close the door to chuck the disc.
1. Connect the oscilloscope to TP RF and TP VC of the MA-C30
board.
2. Set the COMMAND SW of the controller to INITIALIZE and
press the TEST button.
ID2
ON
ID1
ON
ID0
ON
PARITY
ON
3. Set the COMMAND SW of the controller to x1 speed, and press
the TEST button.
ID2
OFF
ID1
OFF
ID0
ON
PARITY
ON
4. Set the COMMAND SW of the controller to Play Audio (23’
47”), and press the TEST button.
level : 0.9V –1.6 V
(RF Level Specification)
ID2
ON
ID1
ON
ID0
OFF
PARITY
ON
5. Check that the oscilloscope waveform is clear, and the RF level
is proper.
* A clear RF signal waveform is as follows.
Removing the disc
Press the OPEN button. The disc unloads from the drive,
comes to the front automatically, and the door opens.
Loading the disc
Press the OPEN button to open the door, place the disc in the
slot in front, then close the door with your hand.
The disc will automatically be chucked in the drive.
A (DC voltage)
0V (VC)
Center of the waveform
B (Traverse level)
