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1. Adjustment Methods
If a disc player is adjusted incorrectly or inadequately, it may malfunction or not work at all even though there is nothing
at all wrong with the pick up or the circuitry. Adjust correctly following the adjustment procedure.
1-1 Adjustment items/verification items and order
[step| tem |
Test point
Adjustment location
| 4_| Focus offset adjustment
| 2 | Grating adjusment
| TP 1, Pin 2(TRK.ERR) [Grating adjustment sit
|
| 3. | Tracking error balance adjustment_|TP1,Pin2(TRK.ERR)
|VRIOZCRK.BAL)
|
PO
a
ae
tangential direction tilt adjustment
gential tilt adjustment screw
te
ment
TP 1, Pin 2 (TRK. ERR)
P26. Focus error signal verification
TP 1, Pin 6 (FCS. ERR)
SaaS
e@ Abbreviation table
FCS.ERR
: Focus Error
Focus Offset
Tracking Error
:
Tracking Balance
FCS.IN
: FocusIn
TRK.IN
: Tracking In
1-2 Measuring instruments and tools
. Dual trace oscilloscope (10:1 probe)
. Low-frequency oscillator
. Test disc (YEDS-7)
12-cm disc (with at least about 70 minutes of recording)
For Twin-tray CD type, an 8-cm disc (with at least about 20 minutes of recording) can also be used.
For Multi-play CD type, use only the YEDS-7 test disc.
. Low-pass filter (39 kQ + 0.001 pF)
. Resistor (100 kQ)
. Hexagonal wrench (M3 mm) (not used for Multi-play CD type)
. Standard tools
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