Sony HCD-XGR60 Cd Section, HCD-XGR6/XGR60, S-Curve Check, Procedure, RF Level Check, Bd Board

HCD-XGR6/XGR60

CD SECTION

Note :

1.CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

2.Use LUV-P01 (4-999-032-01) unless otherwise indicated.

3.Use an oscilloscope with more than 10M impedance.

4.Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

S-Curve Check

Oscilloscope

BD board

TP(FE)

TP(DVC)

Procedure :

1.	Connect oscilloscope to TP (FE).
2. Connect between TP (FE) and TP (DVC (				1.65 V) by lead
	wire.
3.	Press the	\/1	button to turn the power ON.
4. Load a disc (LUV-P01) and actuate the focus search. (In conse-
	quence of open and close the disc tray, actuate the focus search)
5. Confirm that the oscilloscope waveform (S-curve) is symmetri-
	cal between A and B. And confirm peak to peak level within 2

Note: Clear RF signal waveform means that the shape “◊ ” can be

clearly distinguished at the center of the waveform.

VOLT/DIV : 200mV

TIME/DIV : 500ns

level : 1.45 ± 0.3Vp-p

E-F Balance (1 Track jump) Check

oscilloscope

BD board

TP(TE)

TP(DVC)

Procedure:

1.Connect oscilloscope to TP (TE) and TP (DVC) board.

2.Press the \/1 button to turn the power ON.

3.Load a disc (LUV-P01) and playback the number nine track.

4.Press the bB button. (Becomes the 1track jump mode.)

5.Confirm that the level B and A (DC voltage) on the oscillo- scope waveform.

± 0.5 Vp-p.

S-curve waveform

symmetry

A

within 4 ± 1Vp-p

B

	B
0V
	B=1.3 ± 0.6Vp-p symmetry
Specified level:	A ⋅ 100=less than – 22%
	B

center of waveform

A (DC voltage)

6. After check, remove the lead wire connected in step 2.

Note : • Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7.

•Take sweep time as long as possible and light up the brightness to obtain best waveform.

RF Level Check

oscilloscope

BD board

TP(RFDC)

TP(RFAC)

Procedure :

1.Connect oscilloscope to TP2 (RFDC) and TP1 (RFAC).

2.Press the \/1 button to turn the power ON.

3.Load a disc (LUV-P01) and playback.

4.Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

6. Adjust RV101 so that A (DC voltage) becomes 0.

Checking Location:

[BD BOARD]

DVC

RFAC

FE

SE

TE

RFDC

RV101

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