JVC FSSD-58-V, FSSD-78-V, FSSD-98-V Service manual

FS-SD58V / FS-SD78V / FS-SD98V

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

FS-SD58V

FS-SD78V / FS-SD98V

Contents

REMOTE CONTROL

DIMMER SLEEP

FM MODE

DISPLAY DOOR SLIDE

MPX

TONE

CLOCK

AHB PRO

CONTROL

/

TIMER

PLAY MODE REPEAT CANCEL

HIGHLIGHT

VIDEO INTRO STILL

PBC ON

/

OFF

ON SCREEN

VCD NUMBER

UP

NEXTPREV

SELECT

SET

DOWN

VCD NUMBER

FADE MUTING

CD

MD / AUX

FM / AM

VOLUME

CA-SD58V

REMOTE CONTROL

DIMMER SLEEP

FM MODE

DISPLAY DOOR SLIDE

MPX

TONE

CLOCK

AHB PRO

CONTROL

/
TIMER

PLAY MODE REPEAT CANCEL

HIGHLIGHT

VIDEO INTRO STILL

PBC ON

/

OFF

ON SCREEN

VCD NUMBER

UP

NEXTPREV

SELECT

SET

DOWN

VCD NUMBER

FADE MUTING

CD

MD / AUX

FM / AM

VOLUME

SP-SD78V, SD98V SP-SD78V, SD98V

CA-SD78V, CA-SD98V

These models are different only speaker systems.

FS-SD78V and FS-SD98V are different only speaker cabinet.

These models not have adjustment.

NTSC / PAL COMPATIBILITY

NTSC / PAL COMPATIBILITY

Area Suffix

FS-SD58V

UB
UF

SP-SD58VSP-SD58V

US

FS-SD78V / FS-SD98V

UF
US

Hong Kong

China

Singapore

China

Singapore

Safety Precautions
Important for laser products
Preventing static electricity
Dismantling and assembling
the traverse unit
Disassembly method
Maintenance of laser pickup
Replacement of laser pickup

This service manual is printed on 100% recycled paper.

COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.

1-2
1-3
1-4

1-5
1-6 14
1-15
1-15

Flow of functional operation
unit TOC read
Method of connecting
treatment device wire
Description of major ICs

1-16

1-17
1-18

No.20882

Nov. 2000

FS-SD58V/FS-SD78V/FS-SD98V

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 of electrical shock.
Do not use a line isolation transformer during this check.

Plug the AC 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 an 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
metal part and a known good earth ground.
Measure the AC voltage across the resistor with the
AC voltmeter.

AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)

Move the resistor connection to eachexposed metal
part, particularly any exposed metal part having a
return path to the chassis, and meausre the AC
voltage across the resistor. Now, reverse the plug in
the AC outlet and repeat each measurement. voltage
measured Any must not exceed 0.75 V AC (r.m.s.).

0.15 F AC TYPE

1500 10W

Place this
probe on
each exposed
metal part.

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

Good earth ground

1-2

1. This equipment has been designed and manufactured to meet international safety standards.

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.

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.

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

WARNING LABEL

CLASS 1
LASER PRODUCT

!

CAUTION

Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.

FS-SD58V/FS-SD78V/FS-SD98V

1-3

FS-SD58V/FS-SD78V/FS-SD98V

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-SD58V/FS-SD78V/FS-SD98V

Dismantling and assembling the traverse unit

Notice regarding replacement of optical pickup

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 to the optical pickup or connected devices.

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.

Laser pick-up unit

KSM-770ABA

Shorting

Short circuit land

1-5

FS-SD58V/FS-SD78V/FS-SD98V

Disassembly method

<Main body>

Removing the CD door (See Fig.1)

1.

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

Removing the rear cover (See Fig.2)

Piro to performing the following procedure, remove
the CD door.

1.

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

B

C

CD door

Rear cover

B

Fig.1

C

B

AA

C

Removing the right and left covers

(See Fig.3)

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

1.

Remove the four screws D 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.

Left cover

D

B

Bottom

B

Fig.2

Fig.3

Right cover

D

B

1-6

FS-SD58V/FS-SD78V/FS-SD98V

Removing the front panel assembly

(See Fig.4 to 6)

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

1.

Remove the three screws E 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.

If necessary, remove the screw F which retains the
wire extending from the front panel assembly.

Left side

Front panel assembly

Bottom

Front panel assembly

Front panel assembly

E

Fig.4

F

Right side

Joints a

Removing the CD mechanism base
assembly (See Fig.7 to 14)

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

1.

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 wire from
CN705 of the CD mechanism base assembly
respectively.

2.

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.

Joints b

F

CD door

Fig.6Fig.5

F

Fig.7

CD mechanism base assembly

CN104

CN105

Fig.8

Main bard

1-7

FS-SD58V/FS-SD78V/FS-SD98V

3.

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

4.

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

5.

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

6.

Pull out the CD mechanism base assembly toward
the front.

CD mechanism base assembly

F

I

CN705

Main board

CN101

Fig.9

CD mechanism base assembly

F

CD mechanism base assembly

I

Door arm

CD mechanism base assembly

Gear a

Fig.12

Door arm

Heat sink board

CN804

Fig.10

CD mechanism base assembly

Heat sink board

G

Fig.11

CN301

Door arm board (L)

1-8

CN804

Fig.14

Gear a

Fig.13

FS-SD58V/FS-SD78V/FS-SD98V

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

(See Fig.15 to 20)

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:

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.

When the door arms incline, the door
arm assembly and the door arm board
(R) and (L) may not be removed.

Door arm

Door arm

Door arm board (L)

Fan motor

Fig.15

Door arms (Attached to the CD door)

Door arm board (R)

Door arm assembly

H

Fig.17

J

Door arm assembly

Fig.16

Door arm assembly

Fig.18

J

Door arm board (R)

H

J

Door arm board (L)

I

J

Fig.19

Fig.20

1-9

FS-SD58V/FS-SD78V/FS-SD98V

Removing the power amplifier board

(See Fig.21 and 22)

Prior to performing the following procedure, remove
the CD mechanism base assembly.

1.

Disconnect the wires from connector CN102 and
CN193 on the main board and release them from the
cord stopper respectively.

2.

Remove the two screws K and the two screws L
attaching the heat sink and the power amplifier
board.

Removing the transformer assembly

(See Fig.21)

Prior to performing the following procedure, remove
the CD mechanism base assembly.

1.

Disconnect the wires from connector CN191 and
CN192 on the main board and release them from the
cord stopper respectively.

Door arm assembly

CN191

Cord stopper

M

Cord stopper

Transformer assembly

Heat sink board

CN193

M

CN192

CN181

Fig.21

CN106

CN102

Heat sink board

Cord
stopper

Main board

Cord stopper

2.

Remove the four screws M attaching the transformer
assembly.

Removing the gear motor assembly

(See Fig.23 and 24)

Prior to performing the following procedure, remove
the CD mechanism base assembly and the door arm
assembly.

1.

Disconnect the wires from connector CN106 on the
main board and release it from the cord stopper.

2.

Remove the three screws N attaching the gear
motor assembly. Remove the gear motor assembly
with the gear motor stopper.

3.

Remove the belt from the gear motor assembly.

4.

Remove the two screws O from the gear motor
assembly.

Heat sink

Gear motor stopper

L

N

N

Motor

K

Fig.22

Gear motor assembly

CN106

Fig.23

Cord stopper

1-10

O

Belt

Fig.24

Removing the fan motor assembly

(See Fig.25 and 26)

Prior to performing the following procedure, remove
the CD mechanism base assembly.

1.

Disconnect the wires from connector CN181 on the
main board.

2.

Remove the two screws P on the left side of the
body. Move the fan motor assembly upward to
remove it from the base chassis.

3.

Remove the two screws Q and the fan motor from
the fan bracket.

Fan motor

P

FS-SD58V/FS-SD78V/FS-SD98V

Main bard

CN181

Fig.25

Q

Removing the main board (See Fig.27)

Prior to performing the following procedure, remove
the CD mechanism base assembly and the door arm
assembly.

To facilitate operation process, remove the gear
motor assembly before performing the following
procedure.

1.

Disconnect the wires from connector CN102, CN106,
CN191, CN192, CN193 and CN181 on the main
board.

2.

Remove the five screws R attaching the main board
with the cord clamp.

<Front panel assembly>

Removing the front panel board

(See Fig.28)

Prior to performing the following procedure, remove
the front panel assembly.

1.

Remove the seven screws S attaching the front
panel board inside the front panel assembly.

Fan bracket

CN191

R

S

Fan motor

R

CN106

CN193

CN192

R

Front panel assembly

Fig.26

Gear motor assembly

Main board

R

CN102

CN181

Fig.27

S

S

S

Fig.28

1-11

FS-SD58V/FS-SD78V/FS-SD98V

<CD mechanism base assembly>

Prior to performing the following procedure, remove
the CD mechanism base assembly.

Removing the speaker terminal board

(See Fig.29)

1.

Remove the screws T attaching the speaker terminal
board on the underside of the CD mechanism base
assembly.

Removing the VCD CB assembly

(See Fig.30 to 33)

1.

Disconnect the card wire from connector CN711 on
the CD mechanism board attached to the CD
mechanism base.

2.

Disconnect the wires from connector CN102 and
CN103 on the VCD CB assembly.

CD mechanism board

VCD CB assembly

VCD CB assembly

Card wire

Speaker terminal board

T

CD mechanism cover

Fig.29

3.

Unjoint the six joints (f) with the VCD shield (L) and
the VCD shield (U). Remove the VCD shield (L) in
the direction of the arrow.

4.

Remove the VCD CB assembly from the VCD shield
(L).

VCD CB board

CD mechanism board

CN711

Fig.30

f

f

CN103

f

CN102

f

Fig.31

f

VCD shield (L)

f

f

1-12

VCD shield (L)

f

VCD shield (U)

f

Fig.32Fig.33

FS-SD58V/FS-SD78V/FS-SD98V

Removing the CD mechanism board /
mechanism assembly (See Fig.34 to 38)

Prior to performing the following procedure, remove
the VCD CB assembly.

1.

Turn over the CD mechanism assembly and remove
the screw X which retains the wire extending from
the CD mechanism board.

2.

Remove the seven screws U attaching the CD
mechanism cover and the CD mechanism board.

3.

Disconnect the wire from connector CN703 and
CN706 on the CD mechanism board respectively.

4.

Turn back the CD mechanism assembly and detach
the CD mechanism cover while pulling the CD
mechanism assembly outward to release the two
joint tabs marked c.

5.

Disconnect the card wire from the connector of the
CD mechanism assembly inside the CD mechanism
cover. Disconnect the wire from CN605 on the CD
mechanism board. Pull the CD mechanism assembly
out of the three shaft of the CD mechanism cover.

CD mechanism board

CN706

U

CN703

X

U

CD mechanism assembly

CD mechanism cover

U

U

Fig.34

ATTENTION:

6.

Remove the CD mechanism board from the CD
mechanism cover.

When reassembling, confirm that the
cushion of the CD mechanism assembly
is reattached to the three shafts.

Shafts

CD mechanism cover

Joint c

CD mechanism cover

Cushion

CD mechanism assembly

Tab

CD mechanism cover

Fig.35

CD mechanism assembly

Joint c

Tab

Fig.36

Cushion

CD mechanism
cover

CD mechanism board

CD mechanism board

CN605

Fig.37Fig.38

1-13

FS-SD58V/FS-SD78V/FS-SD98V

Removing the jack board (See Fig.39)

Prior to performing following procedure, remove the
CD mechanism board.

1.

Disconnect the wire from connector CN502 on the
jack board.

2.

Remove the two screws V attaching the jack board.

Removing the switch board (See Fig.39)

Prior to performing following procedure, remove the
CD mechanism board.

1.

Disconnect the wire from connector CN502 on the
jack board.

2.

Remove the six screws W attaching the switch
board.

Jack board

V

W

CD mechanism board

CN502

V

Fig.39

Tabs d

W

W

Switch board

Removing the LED board

(See Fig.40 and 41)

1.

Disconnect the wire from connector CN706 on the
CD mechanism board on the underside of the CD
mechanism base assembly.

2.

Push inward the two tabs d attaching the LED board
case and release them.

3.

Pull out the LED board from the LED board case.

Fig.40

LED board

Fig.41

LED board case

1-14

FS-SD58V/FS-SD78V/FS-SD98V

Maintenance of laser pickup

(1) Cleaning the pick up lens
Before you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.

(2) Life of the laser diode
When the life of the laser diode has expired,
the following symptoms will appear.

1. The level of RF output (EFM output:amplitude
of eye pattern) will below.

Is the level of

RFOUT under

1.25V 0.22Vp-p?

YES

O.K

NO

Replace it.

Replacement of laser pickup

Turn off the power switch and,disconnect the
power cord from the ac outlet.

Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on.
At this time,check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is
attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the
characteristics of the whole optical block, do not touch the semi-fixed resistor.
If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged
due to excessive current.

1-15

FS-SD58V/FS-SD78V/FS-SD98V

Flow of functional operation until TOC read

Power ON

Play Key

Slider turns REST
SW ON.

Automatic tuning
of TE offset

Check Point

Confirm that the voltage at the pin4
of CN605 is "H"/"L"/"H".

Tracking error waveform at TOC reading

Approx.3sec

Tracking
servo
off states

Automatic measurement
of TE amplitude and
automatic tuning of
TE balance

VREF

pin 25 of
IC601(TE)

Approx

1.8V

Disc states
to rotate

Tracking
servo
on states

Disc to be
braked to stop

TOC reading
finishes

500mv/div
2ms/div

Fig.1

Laser ON

Detection of disc

Automatic tuning of
Focus offset

Automatic measurement of
Focus S-curve amplitude

Disc is rotated

Focus servo ON
(Tracking servo ON)

Automatic measurement of
Tracking error amplitude

Automatic tuning of
Tracking error balance

Check that the voltage at the
pin40 of IC603 is + 5V?

Confirm that the Focus error
S-cuve signal at the pin28 of
IC603 is approx.2Vp-p

Confirm that the signal from
pin24 IC603 is 0V as a
accelerated pulse during
approx.400ms.

Confirm the waveform of
the Tracking error signal.
at the pin 25 of IC601 (R6009)
(See fig-1)

1-16

Automatic tuning of
Focus error balance

Automatic tuning of
Focus error gain

Automatic tuning of
Tracking error gain

TOC reading

Play a disc

Confirm the eys-pattern
at the lead of TP602

FS-SD58V/FS-SD78V/FS-SD98V

Method of connecting treatment device wire

When the KSM-770ABA mechanism is used, the expansion cable is used as follows.

EXTFSSD5-JIG

extension wire

QUQB12-0840CJ

8pin card wire

QUQB12-0940DJ

9pin card wire

QUQB12-1840DJ

18pin card wire

QUQB12-1640DJ

16pin card wire

First short-circuit the pickup circuit before removing the pickup.Then carry out the replacement.
Refer to "Dismantling and assembling the traverse unit" on page 1-5.

KSM-770ABA

Laser pick-up unit

Shorting

Short circuit land

1-17

FS-SD58V/FS-SD78V/FS-SD98V

Description of major ICs

BD3861FS-X (IC501) : Audio sound control

1. Pin layout

32 18

117

2. Block diagram

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

0dB~

-70dB

Vcc/2 Vcc/2

Vcc/2

Vcc/2

25k

25k

12345678910111213141516

25k

25k

25k

25k

25k

25k

Treble1
f0=10kHz

25k

25k

Treble2
f0=10kHz

Vcc/2

Vcc/2

25k

25k

Middle2
f0=1kHz

25k

25k

25k

25k

Middle1
f0=1kHz

25k

25k

25k

25k

Bass1
f0=90Hz

12k

100k

0dB~

-59dB

24k

Vcc/2

Vcc/2

Bass2
f0=90Hz

0dB~

-59dB

Vcc/2

Vcc/2

Logic

3. Pin function

Pin

Symbol SymbolFunction Function

No.

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16

A1
A2
B1
B2
C1
C2
D1
D2
E1
E2

MIC

FIL

GND

DATA

CLK

Vcc

CH1 input pin A
CH2 input pin A
CH1 input pin B
CH2 input pin B
CH1 input pin C
CH2 input pin C
CH1 input pin D
CH2 input pin D
CH1 input pin E
CH2 input pin E
Microphone input pin
Filter pin
Ground pin
Serial data latch receiving pin
Serial clock receiving pin
Power supply pin

17
18

BASS21

19

BASS22
20
21

BASS11
22

BASS12
23
24
25
26
27
28
29
30
31
32

OUT2

OUT1

MID11
MID12
MID21
MID22

TRE2
TRE1
VOL1

VOL2
GOUT2
GOUT1

CH2 output pin
CH2 bass filter setting pin
CH2 bass filter setting pin
CH1 output pin
CH1 bass filter setting pin
CH1 bass filter setting pin
CH1 middle filter setting pin
CH1 middle filter setting pin
CH2 middle filter setting pin
CH2 middle filter setting pin
CH2 treble filter setting pin
CH1 treble filter setting pin
CH1 input volume input pin
CH2 input volume input pin
CH2 input gain output pin
CH1 input gain output pin

1-18

LA6541-X(IC602) : Servo Driver

1. Pin Layout & Block Diagram

FS-SD58V/FS-SD78V/FS-SD98V

Vcc Vref Vin4 Vg4 Vo8 Vo7

24 23

22

21

20

19

11k

Vcc

Gnd

Vo6 Vo5 Vg3 Vin3 Cd Res

18

17 16

ohm

- +

- +

Level
shift

Level
shift

B T L
driver

B T L
driver

B T L
driver

B T L
driver

Level
shift

Level
shift

11k
ohm

1

2

Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg

3456

Gnd

7 8 9101112

2. Pin functions

Pin

Symbol Function

No.

1

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

2
3
4
5
6
7
8
9

Vcc

Mute

Vin1

Vg1
Vo1
Vo2
Vo3
Vo4
Vg2

Vin2

Reg Out

Reg In

Res

Cd

Vin3

Vg3
Vo5
Vo6
Vo7
Vo8
Vg4

Vin4

Vref

Vcc

Power supply (Shorted to pin 24)
All BTL amplifier outputs ON/OFF
BTL AMP 1 input pin
BTL AMP 1 input pin (For gain adjustment)
BTL AMP 1 input pin (Non inverting side)
BTL AMP 1 input pin (Inverting side)
BTL AMP 2 input pin (Inverting side)
BTL AMP 2 input pin (Non inverting side)
BTL AMP 2 input pin (For gain adjustment)
BTL AMP 2 input pin
External transistor collector (PNP) connection. 5V power supply output
External transistor (PNP) base connection
Reset output
Reset output delay time setting (Capacitor connected externally)
BTL AMP 3 input pin
BTL AMP 3 input pin (For gain adjustment)
BTL AMP 3 output pin (Non inverting side)
BTL AMP 3 output pin (Inverting side)
BTL AMP 4 output pin (Inverting side)
BTL AMP 4 output pin (Non inverting side)
BTL AMP 4 output pin (For gain adjustment)
BTL AMP 4 output pin
Level shift circuit's reference voltage application
Power supply (Shorted to pin 1)

15

14

13

11k
ohm

RESET

Regulator

11k
ohm

Reg

out

In

1-19

FS-SD58V/FS-SD78V/FS-SD98V

LA4905 (IC301) : 2ch BTL power IC

1. Pinlayput

123

2. Block diagram

STBY

D.C

PRE GND

IN 1

21

20

2

3

Standby SW

Ripple
filter

Input amplifier

Vcc Vcc(SW)

10

Switching
regulator block

H.L.S.

ABCD

H.L.S. :
Higher
Level signal
selector

Nonlinear/output stage

CH 1

11

Amplifier output stage

SW
drive

8
9

SW B

15

SW E

14

SW OUT1

12

SW OUT2

13

SW GND

16

A

+OUT 1

7

PWR GND 1

5

B

1-20

BEEP

IN 2

ON TIME

4

1

23

BEEP
amplifier

Input amplifier

ON MUTE
muting circuit

Power supply/ground shorting
protection circuit
Overvoltage/thermal protection
circuit

CH 2

Nonlinear amplifier/output stage

Pop noise
prevention circuit

-OUT 1

6

C

D

18

19

17

22

-OUT 2

PWR GND 2

+OUT 2

N.C.

LC72136N (IC2) : PLL Frequency synthesizer

1. Pin layout

FM/AM

CLOCK

FM/ST/VCO

AM/FM

2. Block

XT

CE

DI

DO

SDIN

1
2
3
4
5
6
7
8
9
10
11

22
21
20
19
18
17
16
15
14
13
12

XT
GND
LPFOUT
LPFIN
PD
VCC
FMIN
AMIN

IFCONT
IFIN

FS-SD58V/FS-SD78V/FS-SD98V

3. Function

Pin

Symbol

No.

1

FM/AM

2

3

4

CLOCK

5

6

FM/ST/VCO

7

AM/FM

8

9

10

11

1

22

16

15

3

4

5

6

17

21

XT

CE

DI

DO

LW

MW

SDIN

Reference

Driver

Swallow Counter

1/2

C

2

B

I/F

Powe r

on

Reset

Function

I/O

X'tal oscillator connect (75kHz)

I

LOW:FM mode

O

When data output/input for 4pin(input) and

I

Swallow Counter

1/16,1/17 4bit

1/16,1/17 4bit

12bit

Programmable

Drivers

Data Shift Register & Latch

7821113

6pin(output): H

Input for receive the serial data from

I

controller

Sync signal input use

I

Data output for Controller

O

Output port

"Low": MW mode

O

Open state after the power on reset

O

Input/output port

I/O

Input/output port

I/O

Data input/output

I/O

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

Pin
No.

12

13

14

15

16

17

18

19

20

21

22

Symbol

IFIN

IFCONT

AMIN

FMIN

VCC

PD

LPFIN

LPFOUT

GND

XT

18

19

20

12

I/O

Function
IF counter signal input

I

IF signal output

O

Not use

-

AM Local OSC signal output

I

FM Local OSC signal input

I

Power suplly(VDD=4.5-5.5V)

­When power ON:Reset circuit move

PLL charge pump output(H: Local OSC

O

frequency Height than Reference frequency.

L: Low Agreement: Height impedance)

Input for active lowpassfilter of PLL

I

Output for active lowpassfilter of PLL

O

Connected to GND

­X'tal oscillator(75KHz)

I

1-21

FS-SD58V/FS-SD78V/FS-SD98V

UPD780024AGKB09 (IC701) : CPU

1. Pin layout
64 ~ 49

1

48

2. Block diagram

~

16

17 ~ 32

16-bit TIMER/
EVENT COUNTER

8-bit TIMER/
EVENT COUNTER50

8-bit TIMER/
EVENT COUNTER51

WATCHDOG TIMER

WATCH TIMER

SERIAL
INTERFACE30

33

~

PORT0

PORT1

PORT2

PORT3

78K/0

CPU

CORE

ROM
(32K
BYTE)

PORT4

PORT5

SERIAL
INTERFACE31

UART0

A/D CONVERTER

INTERRUPT
CONTROL

BUZZER OUTPUT

CLOCK OUTPUT
CONTROL

RAM
(1024
BYTE)

VDD0 VDD1 Vss0 Vss1 IC

PORT6

PORT7

EXTERNAL
ACCESS

SYSTEM
CONTROL

1-22