JVC KW-XC777 Service Manual

SERVICE MANUAL

CD/CASSETTE RECEIVER

KW-XC777

Contents

KW-XC777

E

X

Area Suffix

U Other Areas

Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
Flow of functional operation
untill TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

1- 2
1- 3
1- 4
1-23

1-27
1-29
1-29
1-30~47

No.49687

Feb. 2002

KW-XC777

Safety precaution

!

!

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.

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

1-2

KW-XC777

Preventing static electricity

1.Grounding to prevent damage by 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.

2.About the earth processing for the destruction prevention by static electricity

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

2-1 Ground the workbench

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.

2-2 Ground yourself

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

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.

4.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

CD mechanism ass’y

Damper bracket

Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for pick-up and how to
detach the substrate.

1.Solder is put up before the card wire is removed from connector on
the CD substrate as shown in Figure.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)

2.Please remove solder after connecting the card wire with
when you install picking up in the substrate.

Front bracket

Feed motor ass’y

FD screw

CD mechanism
control board

Soldering

FD gear

Pickup unit

1-3

KW-XC777

Disassembly method

Removing the front panel assembly

(See Fig.1 to 3)

1.

Remove the four screws A on both sides of the
body.

2.

Release four joints a on both sides of the body using
a screwdriver and remove the front panel assembly
toward the front. The connector which connects the
front panel assembly with the rear section comes off.

CAUTION:

When reassembling, make sure that
connector CN501 on the front panel
assembly is securely connected to
CN701 on the main board (See Fig.3).

Joint a

A

A

Joint a

Front panel assembly

Fig.1

Joint a

A

CN501

A

Joint a

Front panel assembly

Fig.2

1-4

CN701

Front panel assembly

Fig.3

Removing the system control board /
switch board (See Fig.4 to 5)

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

1.

Remove the twelve screws B retaining the system
control board.

2.

Remove the five screws C retaining the switch
board.

3.

Unsolder WR501 and WR502 of the wires
connecting the system control board with the switch
board.

B

B

WR502

System control board

WR502

B

Switch board

Fig.4

KW-XC777

B

B

WR501

WR502

System control board

CC

Switch board

Fig.5

WR501

1-5

KW-XC777

Removing the CD player section /
cassette player section (See Fig.6 to 10)

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

1.

Remove the ten screws D, the screw E and F
attaching the rear panel on the back of the body.

2.

Remove the three screws G and the two screws H
attaching the heat sink on the left side.

3.

Remove the three screws I attaching the CD player
section and the cassette player section on the both
sides of the body.

4.

Disconnect the card wire from connector CN702 on
the main board in the CD player section on the back
of the body.

5.

Remove the CD player section upward.

CAUTION:

When reassembling, joint the CD player
section and the cassette player section
at four joints b.

D

G

Rear panel

Heat sink

H

E

Fig.6

Fig.7

D

F

D

G

I

CD player section

CN702

I

CD player section

I

Fig.8

Joint b

Joint b

1-6

Joints b

Cassette player section

Cassette player section

Fig.10Fig.9

<CD player section>

KW-XC777

Prior to performing the following procedure, remove
the front panel assembly, the CD player section and
the cassette player section.

Removing the main board (See Fig.11)

1.

Remove the three screws J attaching the main
board. The connector CN601 on the main board is
disconnected from the CD mechanism control board.

CAUTION:

When reassembling, securely connect
connector CN601 on the main board to
the connector on the CD mechanism
control board.

Main board

J

J

Fig.11

CN601

J

K

Removing the CD mechanism assembly

(See Fig.12)

Prior to performing the following procedure, remove
the main board.

1.

Remove the three screws K attaching the CD
mechanism assembly.

K

K

CD mechanism assembly

Fig.12

1-7

KW-XC777

<Cassette player section>

Prior to performing the following procedures, remove
the front panel assembly, the CD player section and
the cassette player section.

Removing the main board (See Fig.13)

1.

Disconnect the card wire from connector CN972 on
the main board.

2.

Remove the two screws L attaching the main board.

Removing the cassette mechanism
assembly (See Fig.13 and 14)

L

M

CN972

Cassette mechanism assembly

Fig.13

Bottom cover

Main board

L

M

Prior to performing the following procedure, remove
the main board.

1.

Disconnect the card wire from connector CN972 on
the main board.

2.

Remove the four screws M from the bottom cover of
the cassette player section.

Removing the connector board

(See Fig.15)

Prior to performing the following procedure,
remove the cassette mechanism assembly.

1.

Remove the screw N and move the connector
board in the direction of the arrow to release the
two joints c.

2.

Disconnect the wire from connector CJ402 and
the card wire from CN403 on the connector
board respectively.

CJ402

Fig.14

N

Connector board

Joints c

CN403

1-8

Fig.15

KW-XC777

<CD mechanism section>

Removing the CD mechanism control
board (See Fig.1 and 2)

1.

Unsolder the part a and b on the CD mechanism
control board.

2.

Remove the stator fixing the CD mechanism control
board and the damper bracket (To remove the stator
smoothly, pick up the center part).

3.

Remove the screw A attaching the CD mechanism
control board.

4.

Remove the CD mechanism control board in the
direction of the arrow while releasing it from the two
damper bracket slots d and the front bracket slot e.

5.

Disconnect the flexible wire from connector on the
pickup unit.

ATTENTION:

Turn the FD gear in the direction of the
arrow to move the entire pickup unit to
the appropriate position where the
flexible wire of the CD mechanism unit
can be disconnected easily.

(Refer to Fig.2)

CD mechanism assembly

D

h

Front bracket

Pickup unit

Damper bracket

D

A

Fig.1

e

b

Flexible wire

a

h

c

D

d

CD mechanism
control board

Shift the lock

Removing the loading motor

(See Fig.3 to 5)

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

1.

Remove the two springs f attaching the CD
mechanism assembly and the front bracket.

2.

Remove the two screws B and the front bracket
while pulling the flame outward.

3.

Remove the belt and the screw C from the loading
motor.

Loading motor

C

f

B

Loading motor

Pull outward

FD gear

Fig.2

CD mechanism control board

f

B

Front bracket

Fig.3

Front bracket

Pull outward

Fig.5

Belt

Flame

Fig.4

1-9

KW-XC777

Removing the CD mechanism assembly

(See Fig.1, 6 to 9)

Prior to performing the following procedure, remove
the CD mechanism control board and the front
bracket (loading motor).

1.

Remove the three screws D and the damper
bracket.

2.

Raise the both sides fix arms and move the fix plates
in the direction of the arrow to place the four shafts g
as shown in Fig.8 and 9.

3.

Remove the CD mechanism assembly and the two
springs h attaching the flame.

4.

Remove the two screws E and both sides rear
damper brackets from the dampers. Detach the CD
mechanism assembly from the left side to the right
side.

ATTENTION:

The CD mechanism assembly can be
removed if only the rear damper
bracket on the left side is removed.

CD mechanism

h

Front bracket

CD mechanism

D

Flame

assembly

D

assembly

h

D

Damper bracket

D

A

Fig.5

Fig.6

e

b

Damper bracket

a

h

c

D

d

CD mechanism
control board

h

D

Fix plate (L)

g

Fix arm (R)

D

Fig.7

Rear damper bracket

g

Fig.8

Rear damper bracket

E

Fix plate(R)

E

Fix arm (L)

Damper

1-10

Damper

g

g

Fig.9

KW-XC777

Removing the feed motor assembly

(See Fig.10)

Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor) and the CD mechanism assembly.

1.

Remove the two screws F and the feed motor
assembly.

Removing the pickup unit

(See Fig.10 and 11)

Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor), the CD mechanism assembly and
the feed motor assembly.

1.

Detach the FD gear part of the pickup unit upward.
Then remove the pickup unit while pulling out the
part i of the FD screw.

Feed motor assembly

F

FD gear

Nut push spring plate

FD screw

Pickup unit

Fig.10

Part i

Part j

Pickup unit

G

Pickup mount nut

Pickup unit

ATTENTION:

2.

Remove the screw G attaching the nut push spring
plate and the pickup mount nut from the pickup unit.
Pull out the FD screw.

When reattaching the pickup unit,
reattach the part j of the pickup unit,
then the part i of the FD screw.

Removing the spindle motor

(See Fig.12 and 13)

Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor), the CD mechanism assembly and
the feed motor assembly.

1.

Turn up the CD mechanism assembly and remove
the two springs k on both sides of the clamper arms.
Open the clamper arm upward.

2.

Turn the turn table, and remove the two screws H
and the spindle motor.

k

FD screw

Spindle motor

Fig.11

k

Fig.12

H

H

Fig.13

1-11

KW-XC777

REFERENCE:

Prior to performing the following
procedures, turn the mode gear on the
bottom of the body until the respective part
comes to the EJECT position (Refer to
Fig.1).

Removing the cassette guide (See Fig.2)

1.

Turn the mode gear to set to RVS play or
subsequent mode.

2.

Remove the cassette guide from the main chassis
while releasing each two joint tabs a in the direction
of the arrow.

Mode gear

Fig.1

Cassette guide

Removing the load arm (See Fig.3)

1.

Remove the E-washer attaching the load arm.

2.

Move the load arm in the direction of the arrow and
release the joint b on the cassette catch.

Load arm

E-washer

Tab a

Joint b

Tab a

Fig.2

Fig.3

1-12

KW-XC777

Removing the cassette hanger assembly /
cassette holder (See Fig.4 to 7)

1.

Check the mode is set to EJECT. Push down the
front part of the cassette holder and move in the
direction of the arrow to release the joint c.

2.

Move the rear part of the cassette hanger assembly
in the direction of the arrow to release it from the two
joint bosses d.

3.

Release the holder stabilizer spring from the hooks e
and f, then pull out from the cassette hanger
assembly.

4.

Bring up the rear side of the cassette hanger
assembly to release the joint g and h.

5.

Pull out the cassette catch from the cassette hanger
assembly.

Cassette holder assembly

Side bracket

Joints c

Cassette holder assembly

Cassette stabilizer spring

Fig.4

Boss d

Cassette hanger assembly

Cassette hanger
assembly

Boss d

Cassette holder
assembly

Hook g

Fig.6

Hook f

Hook e

Fig.5

Cassette hanger assembly

Cassette catch

Cassette holder assembly

Cassette hanger assembly

Hook h

Fig.7

1-13

KW-XC777

Removing the side bracket assembly

(See Fig.8 to 10)

1.

Remove the screw A attaching the side bracket
assembly.

2.

Detach the front side of the side bracket assembly
upward and pull out forward to release the joint i and
j in the rear.

CAUTION:

CAUTION:

When reassembling, make sure that the
boss k of the main chassis is set in the
notch of the load rack under the side
bracket assembly. Do not reattach the
load rack on the boss k.

After reattaching the side bracket
assembly, confirm operation.

Side bracket assembly

Joint i

Joint j

A

Side bracket assembly

Fig.8

Side bracket assembly

Joint i

Joint j

Load rack

Load rack

Boss k

Boss k

Fig.9

1-14

Fig.10

Removing the pinch arm (F) assembly

(See Fig.11 and 12)

1.

Remove the polywasher and pull out the pinch arm
(F) assembly.

2.

Remove the compulsion spring.

Removing the pinch arm (R) assembly

(See Fig.11 and 13)

1.

Remove the polywasher and pull out the pinch arm
(R) assembly.

Removing the slide chassis assembly

(See Fig.14 and 15)

Polywasher

Polywasher

Compulsion spring

Pinch arm
(R) assembly

Fig.11

Pinch arm
(F) assembly

Pinch arm (F) assembly

Polywasher

KW-XC777

REFERENCE:

It is not necessary to remove the head
and the tape guide.

1.

Move the slide chassis assembly in the direction of
the arrow to release the two joints l and remove from
the main chassis.

2.

Remove the rack link.

CAUTION:

When reassembling, first reattach the rack
link, and next fit the boss m and hook n of
the slide chassis assembly to the hole of
the main chassis, and engage the two joints
l.

Rack link

Fig.12

Boss m

Pinch arm
(R) assembly

Fig.13

Head

Hook n

Polywasher

Tape guide

Joint l

Slide chassis assembly

Fig.14

Joint l

Fig.15

1-15

KW-XC777

Removing the head / tape guide

(See Fig.16 and 17)

REFERENCE:

1.

Remove the band attaching the wire to the head.

2.

Remove the two screws B, the head and the head
support spring.

3.

Remove the pinch arm spring from the tape guide.

4.

Remove the tape guide and the pinch spring arm.

CAUTION:

CAUTION:

It is not necessary to remove the slide
chassis assembly.

When reattaching the pinch arm spring, set
both end of it to the pinch spring arm (
remarked o).

When reattaching the head, set the wires
into the groove of the tape guide (Fig.16).

B

Slide chassis assembly

Head

Tape guide

Fig.16

B

Pinch arm spring

Head

Head support spring

Tape guide

Removing the flywheel assembly (F) & (R)

(See Fig.18 and 19)

REFERENCE:

1.

Remove the belt at the bottom.

2.

Remove the two polywashers on the upper side.

3.

Pull out each flywheel assembly downward.

Flywheel assembly (F)

It is not necessary to remove the slide
chassis assembly.

Belt

o

Pinch spring arm

o

Slid chassis assembly

Fig.17

Polywasher

Polywasher

Flywheel assembly (R)

1-16

Fig.18

Flywheel assembly (F)

Fig.19

Flywheel assembly (R)

Disassembling the flywheel assembly (F)

(See Fig.20 and 21)

1.

Push and turn counterclockwise the spring holder (F)
to release the three joints p on the bottom of the
flywheel.

2.

The spring holder (F), the TU spring and the friction
gear play come off.

3.

Remove the polywasher and felt.

Flywheel assembly (F)

Joints p

KW-XC777

Flywheel assembly (R)

Joints q

Disassembling the flywheel assembly (R)

(See Fig.20 and 22)

1.

Push and turn clockwise the spring holder (R) to
release the three joints q on the bottom of the
flywheel.

2.

The spring holder (R), the FF spring and the friction
gear FF come off.

3.

Remove the polywasher and the felt.

Removing the reel board

(See Fig.23 and 24)

1.

Remove the two screws C attaching the reel board.

2.

Move the reel board in the direction of the arrow to
release the joint r.

3.

Unsolder the wires if necessary.

CAUTION:

When reattaching, confirm operation of
the MODE switch and the ST-BY switch.

The mode position between EJECT and
ST-BY is optimum for reattaching.

Joint p

Fig.20

Polywasher

Polywasher

Spring holder (R)

Spring holder (F)

TU spring

Friction gear FF

Friction gear play

Felt

Flywheel assembly (F)

FF spring

Felt

Flywheel assembly (R)

Fig.21 Fig.22

Joint q

Connect the card wire extending from
the reel board to the FFC pad before
reattaching the reel board.

FFC pad

C

Reel board

C

Fig.23

Joint r

FFC pad

CT-1 switch

MODE switch

Soldering

ST-BY switch

Fig.24

1-17

KW-XC777

Removing the gear base arm / gear base
link assembly (See Fig.25 to 27)

1.

Move the gear base arm in the direction of the arrow.

2.

Insert a slotted screwdriver to the gear base spring
under the gear base arm, and release the gear base
arm upward from the boss on the gear base
assembly.

3.

Remove the gear base arm from the main chassis
while releasing the two joints s.

4.

Move the gear base link assemby in the direction of
the arrow to release the two joints t.

REFERENCE:

When reattaching the gear base arm,
make sure that the boss on the gear
base assembly is inside the gear base
spring.

Removing the FFC pad

(See Fig.27 and 29)

Gear base
link assembly

Gear base spring

Joint t

Gear base arm

Joints s

Hook u

FFC pad

Hook u

Joint t

Fig.25

Gear base arm

Screwdriver

1.

Push each joint hook u of the FFC pad and remove
toward the bottom.

Gear base link assembly

Fig.26

Gear base arm

1-18

FFC pad

Fig.27

KW-XC777

Removing the mode gear

(See Fig.28 and 31)

1.

Remove the polywasher on the bottom and pull out
the mode gear.

Removing the mode switch actuator

(See Fig.28, 29 and 31)

1.

Pull out the mode switch actuator at the bottom.

REFERENCE:

When reattaching the mode switch
actuator to the main chassis, make sure to
set on the shaft and insert v into the slot w.

Removing the direction link / direction
plate (See Fig.29 to 31)

1.

Remove the polywasher attaching the direction link.

2.

Bring up the direction link to release the three joints
x, y and z at a time.

3.

Move the direction plate in the direction of the arrow
to release the two joints a’.

REFERENCE:

When reattaching the direction plate,
engage the two joints a’ and move in the
direction of the arrow (Refer to Fig.30).

Mode switch actuator

Direction plate

Direction link

Fig.28

Direction plate

Joints a'

Joint z

Direction link

Slot w

Polywasher

Mode rack assembly

Joint y

Fig.29

Direction plate Mode rack assembly

Joint b'

Mode gear

Polywasher

Joint x

Joint b'

Joint c'

REFERENCE:

When reattaching the direction link,
move the direction plate in the direction
of the arrow and engage the three joint

x, y and z at a time (Refer to Fig.31).

Removing the mode rack assembly

(See Fig.29 and 30)

1.

Move the mode rack assembly in the direction of the
arrow to release the two joints b’ and the joint c’.

REFERENCE:

When reattaching, set the two b’ on the
bottom of the mode rack assembly into the
slots of the main chassis and move in the
direction of the arrow (See Fig.30).

Joints a'

Fig.30

Direction link

Mode switch actuator

Polywasher

v

Mode gear

Direction plate

Mode rack assembly

Fig.31

1-19

KW-XC777

Removing the gear base assembly / take
up gear / reflector gear (See Fig.32 to 34)

1.

Push in the pin d’ of the gear base assembly on the
upper side of the body and move the reflector gear
toward the bottom, then pull out.

2.

Remove the polywasher on the bottom and pull out
the take up gear.

3.

Move the gear base assembly in the direction of the
arrow to release it from the two slots e’ of the main
chassis.

REFERENCE:

The parts are damaged when removed.
Please replace with new ones.

Gear base assembly

Pin d'

Polywasher

Slot e'

Slot e'

Fig.32

Take up gear

Removing the reel driver / reel spindle

(See Fig.34)

1.

Draw out the reel driver from the shaft on the main
chassis and remove the reel driver spring and the
reel spindle respectively.

CAUTION:

The reel driver is damaged when
removed. Please replace with a new
one.

Reflector gear

Reel driver

Reel driver spring

Reel spindle

Main chassis

Fig.33

Reel driver

Reel driver spring

Reel spindle

Gear base assembly

Slots e’

Take up gear

1-20

Reflector gear

Polywasher

Fig.34

Removing the side bracket assembly

(See Fig.35 to 39)

1.

Remove the eject cam plate spring.

2.

Push the joint f‘ through the slot to remove the load
rack downward.

3.

Move the eject cam limiter in the direction of the
arrow to release it from the boss g’ of the side
bracket assembly and from the two joints h’.

4.

Move the eject cam plate in the direction of the arrow
to release the joint i’.

KW-XC777

Joint f'

CAUTION:

Joint h'

When reassembling, confirm operation of
each part before reattaching the eject cam
plate spring.

Side bracket assembly

Boss g'

Eject cam limiter

Side bracket assembly

Joint h'

Joint f'

Eject cam plate spring

Joint h'

Load rack

Fig.35

Boss g'

Eject cam limiter

Eject cam plate

Fig.37

Joint h'

Fig.36

Side bracket assembly

Boss g'

Eject cam plate

Fig.38

Load rack

Joint i'

Side bracket assembly

Eject cam plate

Joint i'

Fig.39

1-21

KW-XC777

Removing the main motor assembly /
sub motor assembly (See Fig.40 to 42)

1.

Remove the belt at the bottom.

2.

Remove the polywasher and pull out the mode gear.

3.

Pull out the reduction gear (B).

4.

Remove the polywasher and pull out the reduction
gear (A).

5.

Remove the two screws D attaching the main motor
assembly.

6.

Remove the two screws E attaching the sub motor
assembly.

7.

Unsolder the wires on the reel board if necessary.

CAUTION:

When reassembling, adjust the length of the
wires extending from the sub motor
asswmbly by attaching them to the side of
the sub motor assembly with the wires
extending from the main motor assembly
using a spacer.

Belt

Reduction gear (B)

Reduction gear (B)

E

Polywasher

Fig.40

D

E

Mode gear

Polywasher

Reduction gear (A)

D

Main motor
assembly

Reduction
gear (A)

Polywasher

Sub motor
assembly

Spacer

Main motor assembly

Sub motor assembly

Main motor assembly

Sub motor assembly

Fig.41

Spacer

Fig.42

1-22

Adjustment method

KW-XC777

Test Instruments reqired for adjustment

1.Digital osclloscope(100MHz)

2.Frequency Counter meter

3.Electric voltmeter

4.Wow & flutter meter

5.Test Tapes

VT724
VT739

VT712
VT703

6.Torque gauge

For playback frequency measurement

For wow flutter & tape speed measurement

for DOLBY level measurement

For head azimuth measurement

Cassette type for CTG-N
(mechanism adjustment)

Measuring conditions(Amplifier section)

Power supply voltage

Load impedance
Line out

DC14.4V(10.5~16V)

4 (2Speakers connection)

20k

Tuner area

Band range
FM : 87.5MHz to 108MHz

AM : 531kHz to 1602kHz

DUMMY LOAD

Exclusive dummy load should be used for AM
and FM dummy load,there is a loss of 6dB
between SSG output and antenna input. The
loss of 6dB need not be considered since
direct reading of figures are applied in this
working standard.

Standard volume position

Balance and Bass,Treble volume .Fader

:Center(Indication"0")

Loudness,Dolby NR,Sound,Cruise:Off

Volume position is about 2V at speaker output with

following conditions.Playback the test tape VT721.

AM mode 999kHz/62dB,INT/400Hz,30%
modulation signal on receiving.

FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz

deviation pilot off mono.

FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev.

Output level 0dB(1 V,50 /open terminal).

Arrangement of Adjusting

Cassette Mechanism Section

Capstan motor

Cassette mechanism
(Surface)

Playback head

Tape speed adjust

Azimuth screw
(Forward side)

Azimuth screw
(Reverse side)

1-23

KW-XC777

Arrangment of adjusting

Head amplifier board section (Reverse side)

R411

VR402

T11

FSMW1093A

B409

R426

C423

R425

D401

VR402:Rch
(Dolby NR level adj)

B407

C425

C424

C419

R410

R416

Q401

R401

B406

D402

C413

1

R424

IC402

VR401:Rch
(Dolby NR Frequency response adj)

C418

R417

R412

11

R414

R415

R418

B411

B410

R413

C417

B404

2

C415

1

C412

1

21

CJ403

IC401

31

C411

B405

B412

B401

R408

VR401

C410

B402

R423

CJ401

C409

C405

R407

C406

C408

C402

R406

C407

R403

1

R405

C404

R404

C403

R422

C401

R402

2

Q402

1

C416

C414

C421

C422

R420

B408

Q403

B403

B413

Information for using a car audio service jig

1. We're advancing efforts to make our extension cords common for all car audio products.
Please use this type of extension cord as follows.

2. As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the
mechanism assembly after disassembly.

3. Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly
and main board assembly.
Check for mechanism driving section such as motor ,etc..

Disassembly method

1. Remove the bottom cover

2. Remove the front panel assembly

3. Remove the top cover .

4. Install the front panel.

5. Confirm that current is being carried by connecting
an extension cord jig.

.

.

Use some paper sheet

Note
Available to connect to the CP701 connector when in-

stalling the front panel.

Extension cord
EXTKSRT002-18P

Extension cord
QUQ110-2119AJ

1-24

Use some paper box

Item Adjustment and check method Adjust Spec

1.Tape position

a)

Playback at FWD side, use the mirror tape and
adjuste azimuth screw A and B, check the tape
position at tape guide position of the head.

b)

Playback at REV side, use the mirror tape and
adjuste azimuth screw A and B, check the tape
position at tape guide position of the head.

c)

Playback at FWD and REV both side, check the
tape position at tape guide position at the head.

KW-XC777

Azimuth
screw A

Azimuth
screw B

2.Head azimuth ajust
and check

a)

Playback at FWD side, adjuste azimuth screw A
to make peak position of Lch /Rch.

*

Oscilloscope wave forme standard is 45 digrees.

b)

Playback at REV side, adjuste azimuth screw B to
make peak position of Lch/Rch.

*

Oscilloscope wave forme standard si 45 digrees.

c)

Chech the level difference of FWD side and REV
side less than 3dB by VTVM.

d)

After operation check, Lch/Rch azimuth output
level difference is less than 1 dB at adjustment
level.

OK

Head

Tape guide

Tape position NG

0

PHASE

45

3.Tape speed
WOW & Flutter

4.Playback frequency
responce

Head

a)

Check the frequency counter and wow flutter
meter are 2940~3090Hz(FWD/REV), less than

0.35%(RMS).

b)

If tape speed is not clear the specification, adjust
the v.resistor inside of motor.

a)

Playback the test tape(VT724:1kHz), spreaker
output set to 2V by set volume.
Playback the test tape(VT739), check level differe

b)

to 0 3dB at 1kHz/10kHz, -4dB 2dB at
1kHz/63Hz.
10kHz level is not clear the specification, readjust
the head azimuth.

Tape

Internal
v.resistor

Tape speed
2940~3090Hz
WOW & Flutter
less than 0.35%
(RMS)

Speaker output
1kHZ/10kHz
:0 3dB
1kHZ/63Hz
:-4 2dB

1-25

KW-XC777

<Service mode>

1.Service mode setting operation

Power off condition, then press button,
button and button together more

than 2sec.

2.Service mode menu

Service mode menu can select the next item
by press button.
After RESET, first operation is start from EEPROM
crear(CD disc title & PSM data), and then continue
from the last operation mode.

Press button, button and button together more than 2sec.

EpromClear

CD_RUNNING

IOP_READ_

C1_C2_ERR_

: Error history crear when connect CD changer

: CD running mode

: Call the pickup laser level
(Pickup laser level indicate when press SEL key. Only CD mode)
: Call the CD C1,C2 error

180

CD_DARTA_RD

CD_ERR_CR_

CD_ERR_RD_

CH_ERR_CR_

CH_ERR_RD_

_VERSION_

: UP key input

: DOWN key input

Decide by SELECT key

Station select UP button and DOWN button can select the mode, it have to press one by one.
Selected menu will done by SEL button to on(press SEL button).

Service mode will release by next condition.

1.Press defferent key.

2.No key input more than 15sec.

3.Pressed remote controller key.

4.ACC to OFF.

: Call the CD LSI data (Only CD mode)

: Crear the CD error history

: Call the CD error history

: Crear the CD changer error history (Only connectd the CD changer)

: Call the CD changer error history (Only connected the CD changer)

: Call microcomputer version of Main, Cassette, and CD changer

1-26

Flow of functional operation until TOC read

Power ON

• When the pickup correctly moves
to the inner area of the disc

Set Function to CD

KW-XC777

• When the laser diode correctly
emits

Microprocessor

commands

FMO
TC9462 "53"

FEED MOTOR
+TERMINAL

TERMINAL

IC501 "10"

REST SW

• When correctly focused

FEO

Focus Servo Loop ON

Disc inserted

Pickup feed to the inner area

Laser emitted

Focus search

Disc rotates

RF signal eye-pattern
remains closed

Tracking loop closed

RF signal eye-pattern
opens

TOC readout

YES

YES

Microprocessor

commands

1

"No disc"

display

• When the disc correctly rotates

Microprocessor
commands

Spindle
motor (-)
IC501 "7"

AccelerationAcceleration

0.5 Sec

Rough

Servo

0.5 Sec

Servo CLV

Jump to the first track

Play

Tracking Servo Loop ON

• RF signal

Rough Servo Mode

CLV Servo Mode
(ProgramArea)

CLV Servo Mode
(Lead-In Area;
Digital: 0)

1-27

KW-XC777

Feed Section

Is the voltage output at

IC621 pin "40" 5V or 0V?

Is 4V present at both

sides of the feed motor?

YES

YES

NO

Is the wiring for IC621

(56) ~ (64) correct?

NO

Is 6V or 2V present at

IC661 "8" and "9"?

NO

YES

YES

Is 5V present at IC661

pin "32"?

YES

Check the vicinity of

IC621.

Check the feed motor

connection wiring.

NONO

Check CD 9V

and 5V.

Check the feed motor.

Focus Section

When the lens is

moving:

4V

Does the S-search

waveform appear at

IC661 pins "5" and "6"?

Spindle Section

Is the disk rotated?

YES

Does the RF signal

appear at TP1?

YES

Is the RF waveform at TP1

distorted?

YES

Check IC661.

NO

YES

NO

NO

NO

Check the circuits in

the vicinity of IC661

pins "5","6","47","48".

Check the pickup and

its connections.

Is 4V present at IC661

pins "33" and "34" ?

Check the spindle motor

and its wiring.

Check the circuits in the

vicinity of IC601 "19" ~ "24"

or the pickup

YES

YES

NO NO

Is 4V present at IC621

pin "41" ?

YES

Check the vicinity of

IC661.

Check IC601 and

IC621.

Proceed to the Tracking

Tracking Section

1-28

section

When the disc is rotated

at first:

Approx. 1.2 V

Is the tracking error signal

output at IC521 "12"?

YES

Check IC521.

Check the circuit in the

vicinity of IC601 pins

"2" ~ "12".

YESYES

Check the pickup and

its connections.

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:ampli
tude of eye pattern) will be low.

KW-XC777

Is RF output

1.0 0.35Vp-p?

YES

O.K

(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.

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.

1-29

KW-XC777

Description of major ICs

TA2147F-X (IC601) : RF amp.

1.Terminal layout

2.Block diagram

VRO

FEO

FEN

RFRP

RFRPIN

RFGO

RFGC

AGCIN

RFO

RFN

13GVSW

14

15

16

17

18

19

20

21

22

23

10pF

40k

30k

20k 20k

20k

20k

BOTTOM

3k

15k

50 A

12k

12k

PEAK

20k

180k

40pF

20k

20k

PEAK

1.3V

180k

40k

240k
15pF

240k

15pF

60k

40k

40pF

60k

50k

2k

20 A

20k

60 A

50k

14k

k

1

80k

x0.5

x0.5

80k
20k

20k

15k

x2

x2

1k

2k

1.75k

10pF

12 RFDC

11

TEO

10

TEN

TEBC

9

8

SEL

7

LDO

MDI

6

5

TNI

4

TPI

3

FPI

2

FNI

1-30

GND

24

3k

1

Vcc

3.Pin function

Pin No.

1
2
3
4
5
6
7
8

Symbol

Vcc
FNI
FPI
TPI

TNI
MDI
LDO
SEL

I/O

Function

-

3.3V Power supply pin

I

Main-beam amp input pin

I

Main-beam amp input pin

I

Sub-beam amp input pin

I

Sub-beam input pin

I

Monitor photo diode amp input pin

O

Laser diode amp output pin

I

APC circuit ON/OFF control signal,laser diode (LDO) control signal input or
bottom/peak detection frequency change pin.

KW-XC777

9

10
11

12
13

TEBC

TEN
TEO

RFDC

GVSW

APC

circuit

GND OFF

HIZ
Vcc

I

Tracking error balance adjustment signal pin
Adjusts TE signal balance by eliminating carrier component from
PWM signal(3-state output, PWM carrier = 88.2kHz) output from
TC9490F/FA TEBC pin using RC-LPF and inputting DC.
TEBC input voltage:GND~Vcc

I

Tracking error signal generation amp negative-phase input pin

O

Tracking error signal generation amp output pin.
Combining TEO signal and RFRP signal with TC9490F/FA configures
tracking search system.

O

RF signal peak detection output pin

I

AGC/FE/TE amp gain change pin

GND

HIZ
Vcc

Connected to Vcc
through 1k resistor

Control signal output

ON

Control signal output

ON

ModeGVSW

CD-RW
CD-DA
CD-DA

LDOSEL

14
15
16
17

18
19
20

21
22
23
24

VRO
FEO

FEN

RFRP

RFRPIN

RFGO
RFGC

AGCIN

RFO
RFN
GND

Reference voltage (VRO) output pin *VRO = 1/2 Vcc when Vcc = 3.3V

O

Focus error signal generation amp output pin

O

Focus error signal generation amp negative-phase input pin

I

Signal amp output pin for track count

O

Combining RFRP signal TEO signal with TC9490F/FA configures tracking
search system.

Signal generation amp input pin for track count

I

RF signal amplitude adjustment amp output pin

O

RF amplitude adjustment control signal input pin

I

Adjusts RF signal amplitude by eliminating carrier component from PWM
signal (3-state output, PWM carrier = 88.2kHz) output from TC9490F/FA
RFGC pin using RC-LPF and inputting DC.
*RFGC input voltage : GND-Vcc
RF signal amplitude adjustment amp input pin

I

RF signal generation amp output pin

O

RF signal generation amp input pin

I

GND pin

-

1-31

KW-XC777

LA4743K (IC901) : Power amp.

1.Block diagram

IN 1

0.22 F

TA B

IN 2

0.22 F

+

Vcc 1/2 Vcc 3/4

2200 F 0.022 F

6 20

+

11

-

+

+

-

9

7

OUT 1+

OUT 1-

1

Protective

circuit

+

-

+

12

+

-

PWR GND1

8

OUT 2+

5

OUT 2-

3

PWR GND2

2

ST BY

R.F

47 F

IN 3

PRE GND

IN 4

+5V
ST ON

+

0.22 F

N.C

+

0.22 F

4

Stand by

Switch

Mute

10

+

Ripple

Filter

Mute

22

circuit

3.3 F

+

15

-

+

-

17

19

10K

+

OUT 3+

OUT 3-

Low Level
Mute ON

25

18

21

23

PWR GND3

OUT 4+

OUT 4-

13

14

Protective

circuit

-

+

+

-

1-32

ON TIME C

22 F

Muting &

16

+

ON Time Control

Circuit

PWR GND4

24

2.Terminal layout

3.Pin function

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

SymbolPin No. Function

TA B
GND
RFO­STBY
RFO+
VCC1/2
RRO­GND
RRO+
VREF
RRIN
RFIN
SGND
LFIN
LRIN
ONTIME
LRO+
GND
LRO­VCC3/4
LFO+
MUTE
LFO-GND
NC

Header of IC
Power GND
Outpur(-) for front Rch
Stand by input
Output (+) for front Rch
Power input
Output (-) for rear Rch
Power GND
Output (+) for rear Rch
Ripple filter
Rear Rch input
Front Rch input
Signal GND
Front Lch input
Rear Lch input
Power on time control
Output (+) for rear Lch
Power GND
Output (-) for rear Lch
Power input
Output (+) for front
Muting control input
Output (-) for front
Power GND
No connection

KW-XC777

LB1641 (IC402) : DC motor driver

1. Pin layout

1 2 3 4 5 6 7 8 9

GND OUT1 P1

VZ IN1 IN2

VCC1

VCC2 P2

10

OUT2

2. Pin function

Input Output

IN1 IN2 OUT1 OUT2

0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0

Mode

Brake

CLOCKWISE

COUNTER-CLOCKWISE

Brake

1-33

KW-XC777

UPD784216AGC160 (IC701) : CPU

1.Pin layout

2.Pin function (1/2)

100 ~ 81

1

~

30

31 ~ 50

80

~

51

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

Symbol

NC
NC
NC
NC
NC
NC
NC

MUTE

VDD

X2
X1

GND

XT2
XT1

RESET

J-BUS INT

REMOCOM

ACC DET

MEMOREY DET

SW1

CST P.REQ

AD SEL

AVDD

AVREF0

KEY0
KEY 1
KEY 2
KEY 3

S METER

ANA

TEMP

IOP

AVss

DIMMER IN

CFL BRIGHT

AVREF1

J-BUS SI

J-BUS SO

J-BUS SCK

J-BUS I/O
LCD DATA

LCD SCK

LCD CE

BEEP

NC

I/O

O

O

O

I/O

O
O
O
O
O
O

Function

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Mute output terminal L:mute

-

Connect to VDD

-

Connect to 12.5MHz X'tal oscillator (output) (Main)

-

Connect to 12.5MHz X'tal oscillator (input) (Main)

-

Connect to GND

-

Connect to 32.768KHz X'tal oscillator (output) (Sub)

-

Connect to 32.768KHz X'tal oscillator (Input) (Sub)

I

System reset input terminal

I

Interlupt signal detection terminal from J-BUS comunication

I

Interlupt signal detection terminal from remote controller

I

ACC power supply detection terminal ("L" input hold)

I

Backup power supply detection terminal

I

CD mechanism SW1 input terminal

I

Cassette mech power supply inclease request signal input
Audio signal switching output (CD-CH/LINE INPUT mode:"H")

-

Connect to VDD (A/D converter power supply)

-

Connect to VDD (A/D converter reference power supply)

I

KEY0 input terminal

I

KEY1 input terminal

I

KEY2 input terminal

I

KEY3 input terminal

I

S meter voltage input terminal

I

Level meter level input terminal

I

Power supply input terminal from thermister (for contrast temp.)

I

Pickup laser level detection terminal

-

Connect to GND (A/D converter, D/A converter GND)

I

Dimmer signal input terminal (dimmer "L" input)
DIMMER ON "H" output

-

Connect to VDD (D/A converter reference power supply)

I

Data input from J-BUS
Data output of J-BUS
Clock output for J-BUS
Input/output select signal outtput of J-BUS (output "H", input "L")
Data output terminal for LCD driver
Clock output terminal for LCD driver
Chip enable output terminal for LCD driver
BEEP output terminal (output frequency 1.5KHz,3.1KHz)
Non connect

1-34

2.Pin function (2/2)

KW-XC777

Pin No.

46~50

51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

Symbol

NC

SD/SI

PLL CE

PLL DATA

PLL CLK

PLL DI

LM1

LM0
SW2
SW3
SW4

REST

E.VOL SO

E.VOL SCK

LCD RESET

TEL MUTE

NC
NC
NC
NC
NC
NC

GND

BUS CLK

CCE

LSI RESET

NC
NC
NC

CD ON

POWER ON

VDD

NC
NC
NC

NC
AREA SET1
AREA SET2

DISC SEL

LCD TEST

FAN

CST P.ON

CST MUTE IN

RESET OUT

TEST
BUS 0
BUS 1
BUS 2
BUS 3

NC

CD-RW

I/O

O
O
O

O
O

I/O
I/O

O

O
O
O

O
O

O
O

O

O
O
O
O

O

Function

-

Non connect

I

Station detector, Stereo signal input terminal (SD : H)
Chip enable output terminal for PLL
Data output terminal for PLL
Clock output terminal for PLL comunication

I

Data input terminal from PLL
Output terminal for CD mecha loading motor (eject side)
Output terminal for CD mecha loading motor (loading side)

I

SW2 input terminal of CD mechanism

I

SW3 input terminal of CD mechanism

I

SW4 input terminal of CD mechanism

I

REST SW input terminal of CD mechanism
Data input/output terminal for E.volume
Communication clock input/output terminal for E.volume
Reset signal output terminal for LCD driver (reset:L)

I

"L" input : Mute output terminal to L

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Non connect

-

Connect to GND
Bus communication clock output terminal for CD LSI
Bus communication chip enable output terminal for CD LSI
RESET output terminal for CD LSI

-

Non connect

-

Non connect

-

Non connect
Power supply control signal output terminal of CD
"H" output at power to ON

-

Connect to VDD

-

Non connect

-

Non connect

-

Non connect

-

Non connect

I

Usual "H"

I

Usual "L"

I

Usual "H"

I

LCD all light to on by "L" input
Output to "H" by templature data
Power supply control signal output terminal of cassette mechanism

I

Mute signal request input terminal from cassette mechanism
Reset output terminal to cassette mechanism

-

Connect to GND
BUS communication data output 0 terminal for CD LSI
BUS communication data output 1 terminal for CD LSI
BUS communication data output 2 terminal for CD LSI
BUS communication data output 3 terminal for CD LSI

-

Non connect
CD-RW select signal output CD-DA:"H" CD-RW:"L"

1-35

KW-XC777

TC9490FA (IC621) : DSP & DAC

1.Pin layout & Block daiagram

DVSS3

RO

DVDD3

DVR

LO

DVSS3

ZDET

VSS5

BUS0

BUS1

BUS2

BUS3

BUCK

/CCE

/RST

VXDD3XOXI

XVSS3

TEIN

VDD3

VSS3

DMO

FMO

AVDD3

SEL

TEBC

RFGC

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

49

50

51

52

LPF

Clock

generator

1-bit

DAC

PWM

Servo control

A/D

53

54

55

56

Address

circuit

ROM

RAM

Digital equalizer

automatic

adjustment circuit

57

58

59

60

61

62

Micro-

controller

interface

circuit

Correction

Audio output

circuit

16k

RAM

Digital output

CLV servo

Sync signal

protection

EFM

Sub code

detector

TMAX

63

VCO

PLL

VREF

D/A

Data

slicer

TRO

FOO

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

TEZI

TEI

SBAD

FEI

RFRP

RFZI

RFCT

AVDD3

RFI

SLCO

AVSS3

VCOF

RVREF

LPFO

LPFN

1-36

VDD5

64

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

BCK

LRCK

AOUT

DOUT

IPF

VDD3

VSS3

SBOK

CLCK

DATA

SFSY

SBSY

/HSO

/UHSO

PVDD3

PDO

17

TMAX

KW-XC777

2.Pin function (1/2)

Pin No.

1
2

3
4

Symbol

BCK

LRCK

AOUT
DOUT

5

6
7
8

9
10
11
12

13

14

VDD3

VSS3
SBOK
CLCK

DATA

SFSY
SBSY

/HSO

/UHSO

IPF

I/O

O
O

O
O
O

-

-

O

I/O

O
O
O

O

O

TC9490FA(2/3)

Function
Bit clock outputpin 32fs, 48fs, or 64fs selectable by command.
L/R channel clock output pin."L" for L channe and "H" for R channel.
Output polarity can be inverted by command.
Audio data output pin. MSB-first or LSB-first selectable by command.
Digital data output pin. Outputs up to double-speed playback.
Correction flag output pin.When set to "H",AOUT output cannot be corrected
by C2 correction processing.
Digital 3.3V power supply voltage pin.
Digital GND pin.
Subcode Q data CRCC result output pin."H" level when result is OK.
Subcode P-W data read clockI/O pin. I/O polarity selectable by command.
Subcode P-W data output pin.
Playback frame sync signal output pin.
Subcode block sync signal output pin. "H" level at S1 when subcode sync is
detected.
Playback speed mode flag output pins.

/HSO

H
H
L

--

H
L
L

--

Playback speed/UHSO

Normal

Double

4 times

---

15
16
17

18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

PVDD3

PDO

TMAX

LPFN

LPFO

PVREF

VCOF

SS3

AV
SLCO

RFI

AV

RFCT

RFZI

RFRP

FEI

SBAD

TEI
TEZI
FOO

TRO

REF

V

-

PLL-only 3.3V power supply voltage pin.

O

EFM and PLCK phase difference signal output pin.

O

TMAX detection result output pin.

TMAX OutputTMAX Detection result

Longer than fixed period

Within fixed period

Shorter than fixed period

I

Inverted input pin for PLL LPF amp.

O

Output oin for PLL LPF amp.

REF

-

PLL-only V
VCO filter pin.

O

Analog GND pin.

­DAC output pin for data slice level generation.

O

RF signal input pin.Zin selectable by command.

I

Analog 3.3V power supply voltage pin.

­RFRP signal center level input pin.

I

RFRP signal zero-cross input pin.

I

RF ripple signal input pin.

I

Focus error signal input pin.

I

Sub-beam adder signal input pin.

I

Tracking error input pin. Inputs when tracking servo is on.

I

Tracking error signal zero-cross input pin.

I

Focus equalizer output pin.

O

Tracking equalizer output pin.

O

Analog reference power supply voltage pin.

-

pin.

"PV

"HIZ"

"AV

DD3

SS3"

"

1-37

KW-XC777

2.Pin function (2/2)

Pin No.

36
37
38

39
40
41
42
43
44
45

Symbol

RFGC
TEBC

SEL

AV

FMO
DMO
V
V

TESIN

XV
46
47
48
49

XV

DV
50
51
52

DV

DVR
53
54
55
56
57
58
59
60
61
62

63
64

DV

ZDET

V
BUS0
BUS1
BUS2
BUS3

BUCK

/CCE

/RST

V

DD3

SS3
DD3

SS3

XI

XO

DD3
SS3

RO

DD3

LO

SS3

SS5

DD5

I/O

O
O
O

O
O

O

O

O

O

I/O

Function
RF amplitude adjustment control signal output pin.
Tracking balance control signal output pin.
APC circuit ON/OFF signal output pin. At laser on,high impedance with
UHS="L" ,H output with UHS="H".

-

Analog 3.3V power supply voltage pin.
Feed equalizer output pin.
Disc equalizer output pin.

-

Digital GND pin.

-

Digital 3.3V power supply voltage pin.

I

Test input pin. Normally,fixed to "L".

-

System clock oscillator GND pin.

I

System clock oscilatoe input pin.
System clock oscillator output pin.

-

System clock oscillator 3.3V power supply voltage pin.

-

DA converter GND pin.
R-channel data forward output pin.

-

DA converter 3.3V power supply pin.

-

Reference voltage pin.
L-channel data forward output pin.

-

DA converter GND pin.
1 bit DA converter zero data detection flag output pin.

-

Microcontroller interface GND pin.

Microcontroller interface data I/O pins.

I

Microcontroller interface clock input pin.

I

Microcontroller interface chip enable signal input pin.At "L".
Bus0 to BUS3 are active.

I

Reset signal input pin. At reset,"L".

-

Microcontroller interface 5V power supply pin.

TC9490FA(3/3)

1-38

UPD789166GB-590 (IC431) : CPU

1.Pin layout

44 ~ 34

1

KW-XC777

33

2.Pin function
Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

~

11

12 ~ 22

Symbol

KEY0
KEY1
KEY2

KEY SEL

DOLBY SEL

RPT SEL

B.SKIP

NC

AVSS

NC

BUS-I/O
BUS-INT
TAPE IN

MAIN POWER

PWR_DET

BUS-SCK

VDD1

BUS-SO

BUS-SI

NC
NC
ICO
XT2
XT1

RESET

X2
X1

VSS0

VDD0

DOLBY

MS IN

FF/REW

MOTOR

SUBMO-

SUBMO+

HEAD SEL

VSS1
REEL

STANBY

MODE
PREQ
MUTE

AVDD

AVREF

I/O

I
I
I
I
I
I
I

-

­O
O

I
I
I
I

I/O

­O

I

-

-

-

-

-

-

-

-

-

­O

I
O
O
O
O
O

I

I

I

I
O
O

-

-

~

23

Function
KEY0 input terminal
KEY1 input terminal
KEY2 input terminal
KEY in select setting terminal (H:active)
DOLBY select setting terminal L: No DOLBY
REPEAT select setting input terminal L:No REPEAT
B.SKIP select setting input terminal
Connect to GND
A/D converter GND voltage. Connect to GND
Non connect
J-BUS I/O switching output. output:H input:L
J-BUS signal interlupt input
Tape IN detection switch input
CTRL+B input H:Normal operation L:Save mode
MEMORY detection
J-BUS clock input/output
Power supply (without port section) connect to 5V
J-BUS data output terminal
J-BUS data input terminal
Non connect
Non connect
Connect to VSS0 or VSS1
Non connect
Connect to VSS0 or VSS1
Reset detection terminal
X'tal oscillator (4.1943MHz)
X'tal oscillator (4.1943MHz)
Ground voltage of port section. Connect to GND
Power supply for port section Connect to 5V
DOLBY ON/OFF setting output H:ON
MS input
Input level selrct for MS L:FF,REW H:Normal PLAY
Main motor output H:Motor rotation
Clockwise operation output for sub motor
Counterclockwise operation output for sub motor
HEAD AMP input signal select output L:FWD H:REV
GND voltage (without port section)
REEL palse input
Standby position detection H:EJECT side L:operation side
Mode palse input L: mechanism position fix
Power request output H:cassette mechanism operation
Mute request output L:mute request
A/D converter analog power supply. Connect to 5V
A/D converter reference voltege. Connect to 5V

1-39

KW-XC777

CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp.

1.Pin layout & block diagram

PBTC2

31

PBFB2

32

PBRIN2

33

PBGND

34

PBFIN2

35

VCT

36

PBREF

37

PBFIN1

38

PBGND

39

PBRIN1

40

PBFB1

2. Pin function

PBOUT2

30 29 28

7k/12k

300k

­+

F2

30k

45k

30k

F1

+

-

300k

7k/12k

12345

PBTC1

PBOUT1

OUTREF2

27

70 /120

70 /120

OUTREF1

TAPEIN2

100k

1

1

100k

TAPEIN1

GND

26

25

T2

TAPE EQ

FWD/RVS

LPF

T1

6

Vcc

DIREF

BIAS

MUTE

Vcc

NC

24

+

+

-

F3

+

7

TCH2

LINEOUT2

23 22 21

NR

OFF/B

-

MS MODE

NR MODE

DET

OFF/B

-

NR

8910

TCH1

LINEOUT1

NC

MS ON/

NC

OFF

MSSW

MSLPF

20

19

18

17

16

15

14

13

12

11

MSMODE

DRSW

TAPESW

MUTESW

NRSW

NC

MSOUT

MSTC

G1FB

G2FB

Pin No. Symbol

1

2

3
4
5
6
7
8
9

10

11
12
13

14
15
16
17
18

19
20
21
22
23
24

PBTC1

PBOUT1

OUTREF1

TAPEIN1

Vcc

NC

LINEOUT1

TCH1

NC

MSLPF

G2FB
G1FB

MSTC

MSOUT

NC

NRSW

MUTESW

TAPESW

DRSW

MSMODE

MSSW

NC

TCH2

LINEOUT2

I/O Function

Playback equalizer amplifier

­capacitance

Playback equalizer amplifier

O

output
Output reference

O

TAPE input

I

Power supply

-

­Line output

O

Time constant for the HLS

-

­Cut-off frequency adjustment

­of the music sensor LPF

Music signal interval detection

­Music signal interval detection

­Time constant for detecting

­music signal interval

Music sensor out

O

No use

­Dolby NR control

I

Mute function control

I

Playback equalizer amplifier

I

control
Head select control

I

Music sensor mode control

I

Music sensor control

I

­Time constant for the HLS

­Line output

O

Pin No. Symbol

25

26
27
28
29

30

31

32

33

34

35
36

37

38

39

40

DIREF

GND

TAPEIN2

OUTREF2

PBOUT2

PBTC2

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

I/O Function

-

Resistance for setting the
reference

-

Ground

I

TAPE input

O

Output reference

O

Playback equalizer amplifier
output

-

Playback equalizer amplifier
capacitance

I

Playback equalizer amplifier
feedback

I

Playback equalizer amplifier
input

-

Playback equalizer amplifier
ground

I

Playback equalizer amplifier
input

O

Center

O

Playback equalizer amplifier
reference

I

Playback equalizer amplifier
input

-

Playback equalizer amplifier
ground

I

Playback equalizer amplifier
input

I

Playback equalizer amplifier
feedback

1-40

FAN8037 (IC661) : CD driver

1. Pin layout & Block diagram

48 47 46 45 44 43 42 41 40 39 38 37

KW-XC777

2. Pin function

Pin

Symbol

No.

1

IN2+

2

IN2-

3

OUT2

4

IN3+

5

IN3-

6

OUT3

7

IN4+

8

IN4-

9

OUT4

10

CTL1

11

FWD1

12

REV1

13

CTL2

14

FWD2

15

REV2

16

SGND

17

FWD3

18

REV3

19

CTL3

20

SB

21

PS

22

MUTE

23

PVCC2

24

DO7-

1

2

3

4

5

6

7

8

9

10

11

12

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

Function

I/O

I

CH2 op-amp input(+)

I

CH2 op-amp input(-)

O

CH2 op-amp output

I

CH3 op-amp input(+)

I

Ch3 op-amp input(-)

O

CH3 op-amp output

I

CH4 op-amp input(+)

I

CH4 op-amp input(-)

O

CH4 op-amp output(+)

I

CH5 motor speed control

I

CH5 forward input

I

CH5 reverse input

I

CH6 motor speed control

I

CH6 forward input

I

CH6 reverse input

-

Signal ground

I

CH7 forward input

I

CH7 reverse input

I

CH7 motor speed control

I

Stand by

I

Power save

I

All mute

-

Power supply voltage

O

CH7 drive output(-)

M

s

S

w

C

M

s

S

w

C

M

s

S

w

C

T.S . D

D

D

D

D

D

D

STAND BY
ALL MUTE

POWER SAVE

Pin
No.

25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Symbol

DO7+

DO6-

DO6+

PGND2

DO5-

DO5+

DO4-

DO4+

DO3-

DO3+

PGND1

DO2-

DO2+

DO1-

DO1+

PVCC1

REGOX

REGX
RESX

VREF

SVCC

IN1+

IN1-

OUT1

36

35

34

33

32

31

30

29

28

27

26

25

Function

I/O

O

CH7 drive output(+)

O

CH6 drive output(-)

O

CH6 drive output(+)

-

Power ground2

O

CH5 drive output(-)

O

CH5 drive output(+)

O

CH4 drive output(-)

O

CH4 drive output(+)

O

CH3 drive output(-)

O

CH3 drive output(+)

-

Power ground1

O

CH2 drive output(-)

O

CH2 drive output(+)

O

CH1 drive output(-)

O

CH1 drive output(+)

-

Power supply voltage

I

Regulator feedback input

O

Regulator output

I

Regulator reset input

I

Bias voltage input

-

Signal supply voltage

I

CH1 op-amp input(+)

I

CH1 op-amp input(-)

O

CH1 op-amp output

1-41

KW-XC777

HA13164A (IC911) : Regulator

1.Terminal layout

123456789101112131415

2.Block diagram

ANT OUT

C3

0.1u

EXT OUT

C4

0.1u

ANT CTRL

CTRL

CD OUT

C5

0.1u

AUDIO OUT

C6

10u

11

12

10

BATT.DET OUT

9

COMPOUT

6

VDD OUT

4

SW5VOUT

5

14

UNIT R:

+B

ACC

ILMOUT

R1

C7

0.1u

0.1u

C8

C1

100u

VCC ACC

8

2

1

7

Surge Protector

BIAS TSD

15

3

TA B

note1) TAB (header of IC)

connected to GND

ILM AJGND GND

13

C2

0.1u

C:F

1-42

3.Pin function

Pin No. Symbol Function

1
2

EXTOUT
ANTOUT

Output voltage is VCC-1 V when M or H level applied to CTRL pin.
Output voltage is VCC-1 V when M or H level to CTRL pin and H level

to ANT-CTRL.
3
4
5
6
7
8
9

10
11
12
13
14
15

ACCIN
VDDOUT
SW5VOUT
COMPOUT
ANT CTRL
VCC
BATT DET
AUDIO OUT
CTRL
CD OUT
ILM AJ
ILM OUT
GND

Connected to ACC.

Regular 5.7V.

Output voltage is 5V when M or H level applied to CTRL pin.

Output for ACC detector.

L:ANT output OFF , H:ANT output ON

Connected to VCC.

Low battery detect.

Output voltage is 9V when M or H level applied to CTRL pin.

L:BIAS OFF, M:BIAS ON, H:CD ON

Output voltage is 8V when H level applied to CTRL pin.

Adjustment pin for ILM output voltage.

Output voltage is 10V when M or H level applied to CTRL pin.

Connected to GND.

HD74HC126FP-X (IC461,IC761) : Buffer

1.Pin layout

KW-XC777

2.Pin function

1C
1A
1Y
2C
2A
2Y

GND

3.Block diagram

1
2
3
4
5
6
7

14
13
12
11
10

VU
4C
4A
4Y
3C
3A

9

3Y

8

Vcc Vcc

1A
2A
3A

Input

4A
1C
2C
3C

See Function Table

4C

1Y

2Y

2Y

3Y

4Y

Output

Output

Output

Output

Input

C
L
H
H

A
X
L
H

Output

Y
Z
H
L

Note) H:High level

L:Low level
X:Irrelevant
Z:Off(High-impedance)
State a 3-state input

1k

S1

CL

1k

Sample as Load Circuit 1

Sample as Load Circuit 1

Sample as Load Circuit 1

Note) CL includes probe and jig capacitance

RPM6938-SV4 (IC502) : Remote sensor

1.Block diagram

AMP

I/V
conversion

PD

magnetic shield

BPF

fo
trimming
circuit

AGC

Detector

Vcc

Comp

Vcc

22k

Rout

GND

1-43

KW-XC777

IC-PST9333U-X (IC432,IC791) : Regulator

1. Pin layout

2. Block diagram

NC 1

GND 2

3. Pin function
Pin No.

1
2
3
4

Symbol

NC

GND

VOUT

Vcc

4 Vcc

3 VOUT

Function
Non connect
GND terminal
Reset signal output terminal
Vcc terminal/Voltage detect terminal

Vcc 4

NC 1

3 VOUT

2 GND

NJM4580V-X (IC961) : Ope amp.

1. Pin layout & Block diagram

A OUTPUT

A-INPUT

A+INPUT

V-

1

A

2

B

3

4

8

V+

7

B OUTPUT

6

B-INPUT

5

B+INPUT

1-44

LC75878W (IC501) : LCD driver

1. Pin layout

100 ~ 76

KW-XC777

2. Block diagram

OSC

VLCD

VLCD0
VLCD1
VLCD2
VLCD3
VLCD4

VDD

VSS

1

~

25

26 ~ 50

P1

GENERAL

PORT

CLOCK

GENERATOR

CONTRAST

ADJUSTER

P4

75

~

51

COM1

COMMON

DRIVER

COM8

S75/COM9

S74/COM10

S73

SEGMENT DRIVER & LATCH

CONTROL

REGISTER

SHIFT REGISTER

CCB

INTERFACE

S1

3. Pin function

No. Symbol

1~73

76~83
84~87

100

74
75

88
89
90
91
92
93
94
95
96
97
98
99

SEG1~SEG73
SEG74
SEG75
COM8~COM1
P1~P4
VDD
VLCD
VLCD0
VLCD1
VLCD2
VLCD3
VLCD4
VSS
OSC
LCD RESET
CE
CL
DI

DI

INH

I/O

O

Segment driver output pin.

O

Segment driver output pin.

O

Segment driver output pin.

O

Common driver output pin.

O

General-purpose output pin.

-

Logic block power supply pin.

-

LCD driver power supply pin.

O

LCD driver bias 4/4 voltage (H-level) power pin.

I

LCD driver bias 3/4 voltage (intermediate level) power pin.

I

LCD driver bias 2/4 voltage (intermediate level) power pin.

I

LCD driver bias 1/4 voltage (intermediate level) power pin.

I

LCD driver bias 0/4 voltage (L-level) power pin.

-

Power supply pin to connect to ground.

I/O

Oscillator pin.

I

Display off, general-purpose output port L fixed input pin.

I

Chip enable

I

Synchronization clock

I

Transfer data

Function

CL

CE

1-45

KW-XC777

M61508FP-X (IC951) : E. volume

1. Pin layout & Block diagram

VCC
(Anarog)

REF

2. Pin function

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

Symbol Function

REF
DEFP IN1
DEFN IN1

INA1
INB1
INC1
IND1

DEFN OUT1

SEL OUT1

VOL IN1

TONE OUT1

FADER IN1

REAR OUT1

FRONT OUT1

NonFader OUT1

GND

DATA
VDDOUT1
VDDOUT2

CLOCK

VDD

NonFader OUT2

FRONT OUT2

REAR OUT2

FADER IN2

TONE OUT2

VOL IN2

SEL OUT2

DEFN OUT1

IND2
INC2
INB2

INA2
DEFN IN1
DEFP IN1

VCC

Grand for IC signal
Differential motion amp. Positive terminal
Differential motion amp. Negative terminal
Input terminal of input selector switch channel 1
Input terminal of input selector switch channel 1
Input terminal of input selector switch channel 1
Input terminal of input selector switch channel 1
Differential output terminal (-)
Input selector output terminal
Volume 1 input terminal
Tone output terminal
Volume 2 input terminal
Fader volume control (Rear) output terminal
Fader volume control (Front) output terminal
Non fader volume output terminal
GND terminal
Control data input terminal
Test terminal
Test terminal
Clock input terminal for serial data transport
Power supply terminal for digital
Non fader volume control output terminal
Fader volume (Front) output terminal
Fader volume (Rear) output terminal
Volume 2 input terminal
Tone output terminal
Volume 1 input terminal
Input selector output terminal
Differential output terminal (-)
Input terminal of input selector switch channel 2
Input terminal of input selector switch channel 2
Input terminal of input selector switch channel 2
Input terminal of input selector switch channel 2
Differential motion amp negative input terminal
Differential motion amp positive input terminal
Power supply terminal

27282930313233343536

50K

LOUDNESS

+

3BAND TONE CONTROL

(BASS/MID/TREBLE)

ZERO CROSS
DETECTOR

ZERO CROSS
DETECTOR

LOUDNESS

+

3BAND TONE CONTROL

(BASS/MID/TREBLE)

A
B

B

A

2526

Zero detect
Select SW

121110987654321

24 23 22 21 20 19

VDO

(Digital)

Soft select

12dB

I/F

12dB

TIMER
DETECTOR

GND

13 14 15 16 17

18

1-46

TB2118F-X (IC21) : PLL

1.Terminal Layout

2423222120191817161514

KW-XC777

13

2.Block diagram

osc

2

1

XO

24

XI

FM VCO

AMVCO

IFC

CE

DIN

DOUT

DIMM

15

16

13

3

4

5

6

123456789

Buff.

ON/OFF

OSC circuit

AMP

AMP

AMP

Serial

Interface

101112

Reference Counter

Prescaler

20-bit BINARY COUNTER

Resistor 1
Resistor 2

I/O PORT

Swallow counter

Phase

Comparator

4-bit

12-bit

Programmable counter

22-bit

40bit shift register

OUTPUT PORT

Constant

power supply voltage

switch

Vdd

switch

Vcc

AM CP.

20

­+

+

-

REG.

22

19

vt

18

FM cp

3.Pin Function

Pin

Symbol I/O Function

No.

XOUT

10
11
12

1
2
3
4
5
6
7
8
9

OSC

CE

DI

CK

DOUT

SR
I/01
I/02

OUT1
OUT2
VDD2

Crystal oscillator pin

O

Non connect

­Chip enable input

I

Serial data input

I

Clock input

I

Serial data output

O

Register control pin

O

I/O ports

I/O

I/O ports

I/O

Non connect

­Non connect

­Single power supply for REF. frequency block

-

7

SL

8

9

I/O -2I/O -1

10 11

12

out-2out-1

vdd2

Pin

Symbol I/O Function

No.

IFC

13

VDD

14

FMIN

15

AMIN

16

DGND

17

FMCP

18

VT

19

AMCP

20

VCC

21

RF

22

AGND

23

XIN

24

17

14

IF signal input

I

Power pins for digital block

­FM band local signal input

I

AM band local signal input

I

Connect to GND (for digital circuit)

­Charge pump output for FM

O

Tuning voltage biased to 2.5V.

­Charge pump output for AM

O

Power pins for analog block

­Ripple filter connecting pin

I

Connect to GND (for analog circuit)

­Crystal oscillator pin

I

21

23

a-gnd

vccd-gndvdd

1-47

KW-XC777

VICTOR COMPANY OF JAPAN, LIMITED

MOBILE ELECTRONICS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.49687)

200202