Sharp CD-C662 Dokumentacja Pobierz pdf (Strona 22)

Samsung Electronics 5-1

5. Alignment and Adjustment

5-1 Mechanical Adjustment

Reference :

For other mechanical adjustments except A/C Head position (X-point) adjustment, refer to the mechanical

manual (DX7-R/DX7-RC/DX8-R/DX8-RC, AC68-20316A).

Test point : TP05 (Envelope)

TP04 (H’D S/W -Trigger)

TP03 (CTL Pulse)

TP06 (Audio out)

Test tape : PAL Color bar

Mono scope

Blank tape (E-240)

5-1-1 A/C Head Point (X-point) Adjustment

1. Playback the mono scope alignment tape.

2. Connect CH-1 scope probe to TP03 and CH-2 scope probe to TP04. And then, trigger head switching pulse.

3. Set tracking preset to 1msec using the ÒTrackingÓ button / of remote control. (Refer to Fig. 1 and 2)

4. Connect CH-1 scope probe to TP05 and the CH-2 to ÒHÕD S/WÓ trigger on CH-1.

5. Insert the adjusting driver(+) into X-point adjusting gear. Adjust the driver in either direction for maximum

envelope waveform.

Note : Since the adjusting gear unit may be damaged, do not adjust by force when adjusting the X-point using

the adjusting driver(+). After turn the X-point adjusting screw(D) counterclockwise a little, perform the

adjustment. After adjustment is completed, tighten the screw. (Refer to Fig. 3)

Fig. 5-1 Tracking preset adjustment

TP4 : HEAD S/W-TRIGGER

TP5 : ENVELOPE

TP3 : CTL PULSE

TP6 : AUDIO OUT

Fig. 5-2 Control pulse adjustment

SCREW(C)

TILT ADJUST

X-POSITION

ADJUST GEAR

HOLE

SCREW(A)

HEIGHT ADJUST

SCREW(B)

AZIMUTH ADJUST

SCREW(D)

X-POINT LOCKING

Fig. 5-4 Location of A/C Head adjustment screw

REMOTE

BUTTONS

TRACKING

CONTROL PULSE REMOVE

PUSH

Fig. 5-3 PCB Layout

- Volt/div. : CH-1 = 0.1V - Time/div. : 5msec

CH-2 = 0.2V

CH-2 Probe

TP04

H’D S/W Pulse

CH-1 Probe

TP03

CTL Pulse

1msec

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 59 60

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