SECTION 7
DIAGRAMS
oscilloscopeAbout RV502 on the AUDIO board7-1. CIRCUIT BOARDS LOCATION
BD boardRV502 of the AUDIO board requires no adjustments. Please note
that it should be dixed to mechanical center position when you
TP (TE)moved and do not know origin position.
TP (VC)
LED board
Adjustment Location :
When a general remote commander is not used:
1. Solder lead wires to TP (DVDD) and TP (TOFF) on the BD[ BD BOARD ] N CONDUCTOR SIDE N
board severally.
2. Connect the oscilloscope to TP (TE) of the BD board.CN102
3. Press the POWER button and turn ON the power supply.
4. Open the front cover, and press the PLUS ONE button.
5. Set the disc (YEDS-18) into the OPLUS ONE� slit.
6. Close the front cover, and chuck the disc.
7. Playback the fifth track of the disc.
8. Short-circuit the lead wire connected at step 1. (The tracking
servo is turned OFF)IC102
TP
9. Check the level B of the oscilliscope's waveform and the A (DC(PLCK)CN103POWER SW board
voltage) of the center of the Traverse waveform.
Confirm the following :TPCN101
A/B x 100 = less than ? 10%(DVDD)
TP
(RF)
Traverse waveform
Center of the waveformTP
IC101(FE)
AUDIO board
B
TP
(VC)
A (DC voltage)0VTPDISPLAY board
(TE)
level : 0.7 ? 0.3 Vp-p
10. Disconnect the lead wire short-circuited at step 8. (The track-
[ DISPLAY BOARD ] N CONDUCTOR SIDE N
ing servo is turned ON.) Confirm the C (DC voltage) is almost
equal to the A (DC voltage) is step 8.
CNP801
DISC SENSOR (S) board
Traverse waveform
TABLE SENSOR board
IC801
C (DCCNP804
0Vvoltage)
TP301
(ADJ)
Tracking servoTracking servo
OFFON
11. Turn OFF the power, and remove the lead wire connected at
step 1.
DISC SENSOR (R) board
BD board
RF PLL Free-run Frequency Check
[ AUDIO BOARD ] N COMPONENT SIDE N
Procedure :
1. Connect the frequency counter to TP (PLCK) of the BD board.
CN501 CN801
frequency counter
BD board
CN811
TP (PLCK)
RV502T501
(No Adjustment)
2. Press the POWER button and turn ON the power supply.
SW board
3. Open the front cover, and press the PLUS ONE button.IC601
4. Set the disc (YEDS-18) into the OPLUS ONE� slit.MOTOR board
5. Close the front cover, and chuck the disc.
6. Playback the fifth track of the disc.
7. Confirm that reading on frequency counter is 4.3218 MHz ? 30
kHz.
N 19 NN 20 N |