Sony CDJ-500 Service Manual page 50

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 ID1 ID0 PARITY
ON ON ON ON
3. Set the COMMAND SW of the controller to x1 speed, and press
the TEST button.
ID2 ID1 ID0 PARITY
ON ON OFF ON
4. Set the COMMAND SW of the controller to Play Audio (23'47"),
and press the TEST button.
ID2 ID1 ID0 PARITY
OFF OFF ON ON
5. Set the COMMAND SW of the controller to tracking off, and
press the TEST button.
ID2 ID1 ID0 PARITY
ON ON OFF 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 (%)
0V (VC)
7. After checking, set the COMMAND SW of the controller to
tracking on, and press the TEST button.
ID2 ID1 ID0 PARITY
ON ON ON OFF
50
Center of the waveform
B (Traverse level)
A (DC voltage)
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 ID1 ID0 PARITY
ON ON ON ON
3. Set the COMMAND SW of the controller to x1 speed, and press
the TEST button.
ID2 ID1 ID0 PARITY
ON ON OFF ON
4. Set the COMMAND SW of the controller to Play Audio (23'
47"), and press the TEST button.
ID2 ID1 ID0 PARITY
OFF OFF ON 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.
level : 0.9V –1.6 V
(RF Level Specification)