Sony HCD-DX30, HCD-RG40 specifications Balance 1 Track jump Check, RF PLL Free-run Frequency Check

HCD-DX30/RG40

Note : Clear RF signal waveform means that the shape “ ◊ ” can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV

TIME/DIV : 500ns

level : 1.45 ± 0.3Vp-p

E-F Balance (1 Track jump) Check

oscilloscope

BD board

TP(TEO)

TP(VC)

Procedure :

1.Connect oscilloscope to TP (TEO) and TP (VC).

2.Turned Power switch on.

3.Load a disc (YEDS-18) and playback the number five track.

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

5.Confirm that the level B and A (DC voltage) on the oscilloscope waveform.

Adjustment Location:

[BD BOARD] (Conductor Side)

		TP		TP
				(XPCK)
		(AGCCON)
12
		1	21	20
TP
	IC103
(TEO)		24
				1
TP		40
			IC101
(FEO)		41		80
		TP
TP		(FEI)	60	61
(VC)
	TP
	(RF)			TP

1 track jump waveform

B

0V

level=1.3±0.6Vp-p symmetry

Specified level: –– 100=less than 22%

A ⋅±

B

center of waveform

A (DC voltage)

(DGND)

6. After check, remove the lead wire connected in step 1.

RF PLL Free-run Frequency Check

Procedure :

1. Connect frequency counter to test point (XPCK) with lead wire.

BD board

frequency counter

TP (XPCK)

2.Turned Power switch on.

3.Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

18