Technics SL-HD550 User manual

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AD0101018C2

Compact Disc Player

SL-HD550

Traverse Deck:RAE0152ZMechanismSeries

Colour

(N)...........GoldType

Area

(E)...........Europe.

SPECIFICATIONS

B Disc tray

C Disc tray open/close button ( 0OPEN/CLOSE)

D Random play button (RANDOM)

E Repeat button (REPEAT)

F CD edit button (EDIT)

G Skip/search buttons (4/1, ¡/¢)

H Stop button ( 7)

I Pause button ( 8)

J Play button and indicator ( 3)

The color of the indicator depends on the operation taking place.

If stopped: orange

If playing: green

REPEATRANDOM

EDIT

OPEN/CLOSE

BC

DEF GHIJ

1

1. Note

Refer totheservice manual for Model No. SE-HD550 (Order No. AD0101015C2)

for information on Accessories and Packaging.

2. Before Repair

Thisequipment(SL-HD550), whichisacomponentofthesystem, issupplied

withpower fromtheAmplifier (SE-HD550) through theTuner (ST-HD550). When

repairing thisequipmentor checking operation ofthesystem, besureto

connect toother systemcomponents withit.

Power supplyand operation checks inthestate ofitas asingleequipmentis

impracticable.

3. Handling Precautions for Traverse Deck

Thelaser diodeinthetraverse deck (optical pickup)maybreak downdueto

potential difference causedbystaticelectricityofclothes or humanbody.

Sobecareful ofelectrostaticbreakdownduring repair ofthetraverse deck

(optical pickup).

3.1. Handling oftraverse deck (optical pickup)

1. Do notsubject thetraverse deck (optical pickup)tostaticelectricityas itis

extremelysensitivetoelectrical shock.

2. Toprotect thelaser diodeagainst electrostaticbreakdown, shorttheflexible

board(FFC board)withaclipor similar object. Refer to Fig. 3-1.

3. Take carenottoapplyexcessivestress totheflexibleboard(FFC board).

4. Do notturnthevariableresistor (laser power adjustment). Ithas alreadybeen

adjusted. Refer to Fig. 3-1.

Fig. 3-1.

3.2. Grounding forelectrostaticbreakdown prevention

3.2.1. Humanbodygrounding

Use theanti-staticwrist straptodischargethestaticelectricityfromyour body.

Refer to Fig. 3-2.

Fig. 3-2.

3.2.2. Worktablegrounding

Putaconductivematerial (sheet) or steel sheet on thearea wherethetraverse

deck (optical pickup)isplaced, and ground thesheet. Refer to Fig. 3-3.

Fig. 3-3.

Caution:

Thestaticelectricityofyour clothes will notbegroundedthrough thewrist

strap.

Sotake carenottolet your clothes touchthetraverse deck (optical pickup).

4. Precaution ofLaser Diode

5. Location ofControls

6. Operation Checks and ComponentReplacement

Procedures

- Thissection describes procedures for checking theoperation ofthemajor

printedcircuitboardsand replacing themaincomponents.

- For reassemblyafter operation checks or replacement, reverse therespective

procedures. Special reassemblyprocedures aredescribedonlywhen

required.

6.1. Checking forthemain P.C.B.

- Check themainP.C.B. as shownbelow.

6.2. Checking fortheCD servo P.C.B.

- Followthe(Step1) -(Step3) ofitem 6.1.