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2-8. Checking the Servo Operation
¢
Checking the focus search spindle kick
1) The focus search operation and the spindle kick operation can be performed continually by pressing < > (PLAY) button
from the "ALL SV OFF" state without inserting a disc. During this check, the message "FOCUS SRCH" is displayed.
2) After checking these operations, press the IM button to return to the "ALL SV OFF" state.
¢
Checking the focus servo
1) Insert the test DISC.
Move the optical pickup to the center track or its around of a disc using the >> and the <4 buttons.
3) Press the "MODE" button until the following servo mode is selected in accordance with the inserted DISC.
*
MO DISC (MO)... ccsccsteseeeesseseentesaseee Select the "SELECT GRV" indication on the display.
®
PIT. DISC (CD) wescssscccacesestececcvesctssenateerves Select the "SELECT PIT" indication on the display.
Press the <4 > button.
When the focus servo is operating normally, the message "FOCUS ON!" is displayed after "FOCUS SRCH".
4)
13G
= noo 000000
GEASS) ooo con 000
NR (ROCK POP) JAZZ)
1G
RDS AGI] (@))
RANDOM
EON RT || MONO
eT
AUTO MARK TIME MARK
—_ (Aes GS)
12G
11G
10G
9G
8G
7G
6G
5G
After the checking is i
aa press the Ml button to return to the "ALL SV OFF" state.
4G
3G
2G
5)
*
Checking that the-all servo loops are turned ON -
'1) The tracking servo and the sled servo are tumed ¢ on and all servo loops work when the "ENTER" button is pressed in the
state of "FOCUS ON!".
When all servo loops are normal, "ALL SV ON" is displayed. .
13G
MD (REC) TAPE aco =
1G
RDS AG|| (en) RANDOM
EON RT || Mono ail
var (ROCK) (POP) JAZZ)
SNe
aS
12G
114
10G
9G
8G
7G
6G
5G
4G
3G
2G
2) After the checking is completed, press the
button to return to the "ALL SV OFF" state.
2-9. Adjustment Mode
Name of adjustment: Temperature compensation adjustment
Test point: Check the indication on the display.
Jig: Thermometer
Adjustment procedure:
1) Start up the MD test mode and press the II button to show the message "ALL SV OFF" on display.
2) Press the "DISPLAY" button to switch the display to "TEMP=$00".
3) Press the il (PAUSE) button to switch the display to "TEMP + **c: +00".
4) Place the thermometer near the MD mechanism to measure the room temperature.
5) Adjust the indication value on display until the room temperature is the same as the indicated temperature ** on the display
using the >> and <4 buttons. After adjustment is complete, press the "ENTER" button.
After the adjustment is completed, press the lf button to return to the "ALL SV OFF' state.
After the above settings are completed, reduce or add the value indicated by the sharp sign (##) of "TEMP + **c: +00" from
or to the value indicated by the asterisk (**) of "TEMP + **c: +00". The calculated value must be the room temperate.
6)
7)
Note:
If the room temperature cannot be measured, do not adjust the above item.
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