JVC FS-SAD9, FS-SD5, FS-SD7 Service Manual

0 (0)

FS-SD5 / FS-SD7 / FS-SD9

SCHEMATIC DIAGRAMS

COMPACT COMPONENT SYSTEM

FS-SD5

FS-SD7 / FS-SD9

CD-ROM No.SML200012

Area Suffix

Taiwan

FS-SD5

FS-SD7, FS-SD9

These models are different only speaker systems.

FS-SD7 and FS-SD9 are different only speaker cabinet.

Contents

Block diagrams	2-1
Standard schematic diagrams	2-3
Printed circuit board	2-7

This schematic diagrams is printed on 100% recycled paper.

No.20885SCH

Dec. 2000

FS-SD5/FS-SD7/FS-SD9

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those

used in the original circuits.	Services		should be performed by qualified personnel only.
2. Alterations of the design or	circuitry	of	the product should not be made.	Any design alterations of
the product should not be made.		Any	design alterations or additions will	void the manufacturer`s

warranty and will further relieve the manufacture of responsibility for personal injury or property

damage resulting therefrom.
3. Many	electrical and mechanical parts in the products	have special safety-related characteristics.
These	characteristics are often not evident from visual	inspection nor can the protection afforded

by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by () on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The	leads	in the products are routed and dressed with ties, clamps, tubings, barriers and the
like	to be	separated from live parts, high temperature parts, moving parts and/or sharp edges

for the prevention	of electric	shock and fire hazard. When service is required, the original lead
routing and dress	should be	observed,	and it should be confirmed	that	they	have been returned
to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always			perform an isolation check	on	the	exposed metal parts

of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control

shafts, etc.) to be sure the product is safe to operate without danger

electrical shock.

Do not use a line isolation transformer during this check.

Plug

the

line

cord directly into the AC outlet.

Using

a "Leakage

Current

Tester", measure

the

leakage

current from each exposed

metal parts of

the

cabinet , particularly any exposed

metal part having a return path to the chassis, to a known

good

earth ground. Any leakage

current must not exceed 0.5mA AC (r.m.s.)

Alternate

check method

Plug

the

AC line

cord directly into the AC outlet.

Use

AC voltmeter having, 1,000 ohms

per volt or more

sensitivity in

the following manner. Connect a

1,500

10W resistor paralleled by

a 0.15

F AC-type

capacitor

between an

exposed

AC VOLTMETER

metal part and a known good earth ground.

(Having 1000

Measure the

voltage across the resistor

with the

ohms/volts,

AC voltmeter.

or more sensitivity)

Move the

resistor

connection

to eachexposed metal

part,

particularly

any exposed metal part having a

0.15

AC TYPE

return

path

to the

chassis, and meausre the AC

Place this

voltage across the

resistor. Now, reverse the plug in

probe on

the AC outlet and repeat each measurement. voltage

each exposed

1500

10W

measured Any must

not exceed 0.75 V AC

(r.m.s.).

metal part.

This

corresponds

to 0.5 mA AC (r.m.s.).

Good earth ground

has been designed and manufactured to meet international

safety

standards.

This equipment

2. It

is the

legal responsibility of the repairer to ensure that these

safety

standards

are maintained.

3. Repairs

must be made in accordance with the relevant safety standards.

4. It

is essential that

safety critical components are replaced by approved parts.

5. If

mains

voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

1-2

FS-SD5/FS-SD7/FS-SD9

Important for Laser Products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

! CAUTION Please use enough caution not to see the beam directly or touch it

in case of an adjustment or operation check.

VARNING : Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

ADVARSEL : Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

CLASS 1

LASER PRODUCT

WARNING LABEL

DANGER : Invisibie laser radiation		VARO : Avattaessa ja suojalukitus
when open and interlock or		ohitettaessa olet alttiina
defeated.		näkymättömälle lasersäteilylle.Älä
AVOID DIRECT EXPOSURE TO		katso säteeseen.	(d)
BEAM	(e)


VARNING : Osynlig laserstrålning är		ADVARSEL :Usynlig laserstråling
denna del är öppnad och spårren är		ved åbning , når
urkopplad. Betrakta ej strålen.	(s)	sikkerhedsafbrydere er ude af
		funktion. Undgå udsættelse for
		stråling.	(f)

1-3

FS-SD5/FS-SD7/FS-SD9

Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.1. Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed.

1.1.1. Ground the workbench

1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

1.1.2. Ground yourself

1. Use an anti-static wrist strap to release any static electricity built up in your body.

(caption)

Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

1.1.3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

2.Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

1.2. Handling the traverse unit (optical pickup)

1.Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2.Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

3.Handle the flexible cable carefully as it may break when subjected to strong force.

4.It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

1-4

FS-SD5/FS-SD7/FS-SD9

Dismantling and assembling the traverse unit

Notice regarding replacement of optical pickup

1.Do not touch the area around the laser diode and actuator.

2.Do not check the laser diode using a tester, as the diode may easily be destroyed.

3.It is recommended that you use a grounded soldering iron when shorting or removing the laser diode. Recommended soldering iron: HAKKO ESD-compatible product

4.Solder the land on the optical pickup's flexible cable.

Note : Short the land after shorting the terminal on the flexible cable using a clip, etc., when using an ungrounded soldering iron.

Note : After shorting the laser diode according to the procedure above, remove the solder according to the text explanation.

KSM-770ABA

Laser pick-up unit

Shorting

Short circuit land

1-5

FS-SD5/FS-SD7/FS-SD9

Disassembly method

Removing the rear cover (See Fig.1)

1.Remove the ten screws A and the five screws B attaching the rear cover on the back of the body.

Removing the right and left covers

(See Fig.2)

Prior to performing the following procedure, remove the rear cover.

1.Remove the four screws C attaching the side covers on the bottom of the body.

2.Move the left cover backward and remove outward. Also remove the right cover in the same way.

Rear cover

B A B A B

A A

Fig.1

C Right cover

Left cover

Fig.2

Removing the front panel assembly

(See Fig.3 to 5)

Bottom

Prior to performing the following procedure, remove the rear cover and the side covers.

1. Remove the three screws D on the bottom of the body.

2.Release two joints a and two joints b on both sides of the body using a screwdriver and remove the front panel assembly toward the front.

Front panel assembly

Fig.3

	Left side	Front panel assembly
	Left side	Right side
		Right side

Fig.4

Joints a

Joints b

Fig.5

1-6

Removing the CD mechanism base assembly (See Fig.6 to 13)

Prior to performing the following procedure, remove the rear cover, the side covers and the front panel assembly.

1.Remove the four screws E attaching the CD door on the upper side of the body.

2.Disconnect the card wire from connector CN104 and CN105 of the main board in the front part of the body. Disconnect the card wire from CN101 of the main board on the right side, and the harness from CN705 and CN708 of the CD mechanism base assembly respectively.

3.Remove the four screws F attaching the CD mechanism base assembly on the upper side of the body. Remove the screw I attaching the earth terminal on the right side.

4.Remove the screw G attaching the heat sink board on the back of the body. Disconnect the harness from connector CN301 and pull the heat sink board fully outward.

CD mechanism base assembly

CN804

Fig.9

FS-SD5/FS-SD7/FS-SD9

CD door

Fig.6

CD mechanism base assembly

CN104	CN105	Main bard

Fig.7

CD mechanism base assembly

CN705

CN708

Main bard

CN101

Fig.8

CD mechanism base assembly

Heat sink board

CN301

Fig.10

1-7

FS-SD5/FS-SD7/FS-SD9

5.Raise the right and left door arms by turning the gear a in the rear of the heat sink board.

6.After the CD mechanism base assembly is detached from the door arms, pull the CD mechanism base assembly toward the front and disconnect the harness from connector CN804 on the left side of the door arm board.

7.Pull out the CD mechanism base assembly toward the front.

CD mechanism base assembly

Door arm

Heat sink board

I	Gear a
I	Door arm
	Fig.11

Gear a

Fig.12

CD mechanism base assembly

Door arm board (L)

CN804

Fig.13

1-8

Removing the door arm assembly / the door arm board (R) and (L)

(See Fig.14 to 19)

Prior to performing the following procedure, remove the rear cover, the side covers, the front panel assembly and the CD mechanism base assembly.

1.In case that the upper parts of the door arms attached to the CD door are not level, let down them to the level position by turning the gear a in the direction of the arrow.

ATTENTION: When the door arms incline, the door arm assembly and the door arm board

(R)and (L) may not be removed.

2.Remove the four screws H on the upper side and the one screw I on the left side of the body.

3.Remove the four screws J attaching the door arm board (L) and (R) on both sides of the door arm assembly.

Door arm assembly

Fig.16

Door arm board (L)

Fig.18

FS-SD5/FS-SD7/FS-SD9

Door arm board (R)

Door arm

Door arm board (L)

Fan motor

Fig.14

Door arms (Attached to the CD door)

Fig.15

Door arm assembly

Fig.17

Door arm assembly

Door arm board (R)

Fig.19

1-9

+ 21 hidden pages