Kenwood RXD 550 Service Manual

Page 15

3. Adjustment of CD player

RXD-500/7OO

ADJUSTMENT

INPUT OUTPUT PLAYER ALIGNMENT
°- , "EM SETTING SEWING SEWING POINT JG" FOR F'G-
Step 1-4 are in TEST MODE -
TEST MODE : While pressing the (TIME DISP.) key, plug the AC power cord into the Ac outlet.
Ofn the power
Set the senor sec- .. .. rom.0.05 0
LASER tion of the optical Press "9 PLAY key Q-5mW- WW} I?
1 - to check that the - dIftractIon grating IS (a)
POWER power meter on the . - .. .. ,
icku lens display Is 03 . correctl alIgned
p p ' with the F level of
0.8Vp-p or more
Connect an oscillo-
TRACKING scope as follows. Press the "PLAY" TE Symmetry between
2 ERROR Test disc Type 4 CH1 2 RF (CN2-1) key. Confirm the BALANCE upper and lower or (c)
BALANCE CH2 : TE (CN2-6) display is"03". VFt2 DC=0125mV
GND : VC (CN2-4)
Connect an oscillo-
FOCUS _ scope as follows. Press the "PLAY" FE
3 ERROR Test dIsc Type 4 CH1 : RF(CN2-1) key. Confirm that BALANCE Optimum eye pattern (d)
BALANCE CH2 : FE(CN2-2) the display is"05" VFt1
GND : VC (CN2-4)
Test disc Type 4 Connect a LPF to
TRACKING Apply signal of CN2 pin 5-6 to Press the "PLAY" TRACKING Two VTVMs should
4 GAIN 1.2kHz, 50myrms which connect an key. Confirm that GAIN read the same (b)
to CN2 pln oscilloscope or AC the displays"05" VRS value.
5-6. voltmeters.
Note:

Type 4disc :SONY YEDS-18 Test Disc or equivalent.
LPF : Around 47k!) + 390pF or so.

(a) Laser Power

O

0.05~0.15 mW

Pickup

Optical power meter

'Iit f toyflrrffirr.
' : . RF signal

titty;

mm...

. ' vc
{*1

ii iI
' v t
I : a +vo
CH2

TE signal

0 RF signal and TE signal in test mode (Focusing servo
ON /Tracking servo OFF). (Disc Type 4)

0 Adjust TE signal so that the waveform is Symmetrical
in relation to V0. VR 2 (TE BALANCE)

15

(b) Tracking Gain Adj.

0 RF signal in test mode (PLAY).

0 Perform the tangential and focusing offset are focused
into one point on the display. The crossing points
above and below the center shall also be looked clear-

ly.

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