JVC KD-SX927R Service Manual

SERVICE MANUAL

CD RECEIVER

KD-SX927R

SOUND

ATT

U

SOURCE

F

R

D

VOL

VOL

EQ

KD-SX992R

DAB

TP

PTY

KD-SX927R

Contents

Safety precaution
Preventing static electricity
Important of laser products
Disassembly method
Adjustment method

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

1-2
1-3
1-4
1-5
1-19

Area Suffix

EE ---- Russian Federation

Flow of functional
operation unit TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs

1-20
1-22
1-22
1-23

No.49740

May. 2002

KD-SX927R

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

Preventing static electricity

KD-SX927R

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 prev ent 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

Short-circuit point

(Soldering)

DET switch

Connector board

Flexible wire

Joints b

Short-circuit

Pickup

Pickup

1-3

KD-SX927R

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.

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.

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

!

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

DANGER : Invisible laser
radiation when open and
interlock or defeated.
AVOID DIRECT EXPOSURE
TO BEAM (e)

ADVARSEL :Usynlig laser­stråling ved åbning , når
sikkerhedsafbrydere er ude
af funktion. Undgå udsæt
telse for stråling. (f)

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

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

1-4

Disassembly method

Removing the front panel unit

(See Fig.1)

1.

Press the release switch and remove the front panel
unit in the direction of the arrow.

Removing the bottom cover

(See Fig.2,3)

1.

Turn the body upside down.

2.

Insert a screwdriver to the two joints a and two joints
b on both sides of the body and the joint c on the
back of the body, then detach the bottom cover from
the body.

KD-SX927R

Eject button

Front panel assembly

Fig.1

Joint a

Bottom cover

CAUTION:

When disengaging the joint c using a
screwdriver, do not damage or break the
board.

Removing the front chassis (See Fig.4,5)

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

1.

Remove the two screws A attaching the front
chassis.

2.

Remove the two screws B on each side of the body.

3.

Release the two joints d and the two joints e on the
sides. remove the front chassis toward the front.

Joint d

B

Joint e

Joint c

Bottom cover

Joint a

Joint b

Fig. 2

Joint b

Joint c

Fig. 3

Joint d

Front chassis

Fig. 5

Joint e

A

Front chassis

Fig.4

1-5

KD-SX927R

Removing the heat sink (See Fig.6)

1.

Remove the four screws C attaching the heat sink
on the left side of the body, and remove the heat
sink.

Removing the rear panel (See Fig.7 )

CCC

Heat sink

Fig. 6

Prior to performing the following procedure, remove
the front chassis, the heat sink and bottom cover.

1.

Remove the six screws D attaching the rear panel
and one screw E attaching the pine jack on the back
of the body.

D

Rear panel

Removing the main amplifier board assembly

(See Fig.8)

Prior to performing the following procedure, remove
the front chassis, the heat sink, bottom cover and the
rear panel.

F

D

E

D

Fig. 7

Main board assembly

D

F

1.

Remove the two screws F attaching the main
amplifier board assembly on the top cover.

2.

Disconnect connector CN501 on the main amplifier
board assembly from the cassette mechanism
assembly.

1-6

CN501

Fig. 8

KD-SX927R

Removing the CD mechanism assembly

(See Fig.9)

Prior to performing the following procedure, remove
the front chassis, the heat sink, bottom cover and the
main amplifier board assembly.

1.

Remove the three screws G attaching the cassette
mechanism assembly from the top cover.

G

H

Removing the (LCD & key) control switch
board (See Fig.10

~ 12)

CD mechanism assembly

G

Fig. 9

G

Top cover

H

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

1.

Remove the four screws H attaching the rear cover
on the back of the front panel assembly.

2.

Unjoint the nine joints f with the front panel and the
rear cover.

3.

Remove the control switch board on the back of the
front panel.

Front panel

H

Joint f

Rear cover

Joint f

Fig. 10

Rear cover

Fig. 11

H

Joint f

Joint f

Front panel

Control switch board

Fig. 12

1-7

KD-SX927R

< CD mechanism section >

Removing the top cover

(See Fig.1 and 2)

1.

Remove the two screws A on each side of the body.

2.

Lift the front side of the top cover and move the
cover backward to release the two joints a.

Removing the connector board

(See Fig.3 to 5)

Top cover

A

A

Joints a

CAUTION:

1.

Remove the screw B fixing the connector board.

2.

Solder the short-circuit point on the connector board.
Disconnect the flexible wire from the pickup.

3.

Move the connector board in the direction of the
arrow to release the two joints b.

4.

Unsolder the wire on the connector board if
necessary.

CAUTION:

Before disconnecting the flexible wire
from the pickup, solder the short-circuit
point on the pickup. No observance of
this instruction may cause damage of
the pickup.

Unsolder the short-circuit point after
reassembling.

A

Fig.1

Joints a

Top cover

Fig.2

DET switch

B

1-8

Flexible wire

Frame

Connector board

B

Connector board

Joints b

Flexible wire

Short-circuit

Fig.3

Fig.4Fig.5

Pickup

Short-circuit point

(Soldering)

Pickup

Removing the DET switch

(See Fig.3 and 6)

1.

Extend the two tabs c of the feed sw. holder and pull
out the switch.

2.

Unsolder the DET switch wire if necessary.

Removing the chassis unit

(See Fig.7 and 8)

Prior to performing the following procedure, remove
the top cover and the connector board.

B

Connector board

Joints b

Short-circuit

Fig.3

KD-SX927R

DET switch

Pickup

1.

Remove the two suspension springs (L) and (R)
attaching the chassis unit to the frame.

CAUTION:

The shape of the suspension spring (L)
and (R) are different. Handle them with
care.

CAUTION:

When reassembling, make sure that the
three shafts on the underside of the
chassis unit are inserted to the dampers
certainly.

Chassis unit

Suspension spring (R)

Suspension spring (L)

Frame

DET switch

Chassis unit

Tab c

Feed sw. holder

Tab c

Fig.6

Shaft

Suspension spring (R)

Fig.7

Suspension spring (L)

Shafts

Damper

Damper

Damper

Frame

Fig.8

1-9

KD-SX927R

Removing the clamper assembly

(See Fig.9 and 10)

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

1.

Remove the clamper arm spring.

2.

Move the clamper assembly in the direction of the
arrow to release the two joints d.

Removing the loading / feed motor
assembly (See Fig.11 and 12)

Prior to performing the following procedure, remove
the top cover, the connector board and the chassis
unit.

1.

Remove the screw C and move the loading / feed
motor assembly in the direction of the arrow to
remove it from the chassis rivet assembly.

Clamper arm
spring

Joint d

Joint d

Clamper assembly

Fig.9

Clamper arm spring

Chassis rivet
assembly

Joint d

Clamper assembly

Joint d

2.

Disconnect the wire from the loading / feed motor
assembly if necessary.

CAUTION:

When reassembling, connect the wire
from the loading / feed motor assembly
to the flame as shown in Fig.11.

Chassis rivet assembly

Fig.10

Loading / feed motor assembly

C

1-10

Loading / feed motor assembly

Fig.12Fig.11

KD-SX927R

Removing the pickup unit

(See Fig.13 to 17)

Prior to performing the following procedure, remove
the top cover, the connector board and the chassis
unit.

1.

Remove the screw D and pull out the pu. shaft
holder from the shaft.

2.

Remove the screw E attaching the feed sw. holder.

3.

Move the part e of the pickup unit upward with the
shaft and the feed sw. holder, then release the joint f
of the feed sw. holder in the direction of the arrow.
The joint g of the pickup unit and the feed rack is
released, and the feed sw. holder comes off.

4.

Remove the shaft from the pickup unit.

5.

Remove the screw F attaching the feed rack to the
pickup unit.

Reattaching the pickup unit

(See Fig.13 to 16)

Joint f

Shaft

D

Joint e

Pu. shaft holder

Feed sw. holder

Pickup unit

Fig.13

Pickup unit

E

Joint f

Joint e

1.

Reattach the feed rack to the pickup unit using the
screw F.

2.

Reattach the feed sw. holder to the feed rack while
setting the joint tab g to the slot of the feed rack and
setting the part f of the feed rack to the switch of the
feed sw. holder correctly.

3.

As the feed sw. holder is temporarily attached to the
pickup unit, set to the gear of the joint g and to the
bending part of the chassis (joint h) at a time.

CAUTION:

4.

Reattach the feed sw. holder using the screw E.

5.

Reattach the shaft to the pickup unit. Reattach the
pu. shaft holder to the shaft using the screw D.

Make sure that the part i on the underside
of the feed rack is certainly inserted to the
slot j of the change lock lever.

F

Feed rack

Feed rack

E

Joint g

Feed sw. holder

Part i

Pickup unit

Slot j

Joint g

Feed sw. holder

Fig.14

Shaft

Joint f

Joint h

Fig.15

D

Pu. shaft holder

Pickup unit

Pickup unit

Fig.16

Feed rack

Joint f

Feed sw. holder

Fig.17

1-11

KD-SX927R

Removing the trigger arm

(See Fig.18 and 19)

Prior to performing the following procedure, remove
the top cover, the connector board and the clamper
unit.

1.

Turn the trigger arm in the direction of the arrow to
release the joint k and pull out upward.

Joint k

Trigger arm

CAUTION:

When reassembling, insert the part l and

m of the trigger arm into the part n and
o at the slot of the chassis rivet

assembly respectively and join the joint
k at a time.

Chassis rivet assembly

Chassis rivet assembly

Trigger arm

Fig.18

Part n

Part o

Part l

Part m

Fig.19

Removing the top plate assembly

(See Fig.20)

Prior to performing the following procedure, remove
the top cover, the connector board, the chassis unit,
and the clamper assembly.

1.

Remove the screw H.

2.

Move the top plate assembly in the direction of the
arrow to release the two joints p.

3.

Unsolder the wire marked q if necessary.

1-12

H

Top plate assembly

Joints p

q

Fig.20

KD-SX927R

Removing the select arm (L) / select lock
arm (See Fig.21 and 22)

Prior to performing the following procedure, remove
the top plate assembly.

1.

Bring up the select arm (L) to release from the link
plate (joint r) and turn in the direction of the arrow to
release the joint s.

2.

Unsolder the wire of the select arm (L) marked q if
necessary.

3.

Turn the select lock arm in the direction of the arrow
to release the two joints t.

The select lock arm spring comes off the select lock
arm at the same time.

Reassembling the select arm (L) / select
lock arm (See Fig.23 to 25)

Select arm (R)

Joint z

Link plate spring

Top plate

Joint a'

Joint y

Link plate

Joint z

Joint s

Fig.21

Select lock arm

Select lock arm

Joint b'

Joint r

Select arm (L)

Select lock arm

q

Top plate

Hook u

Select lock
arm spring

Joints t

REFERENCE:

1.

Reattach the select lock arm spring to the top plate

Reverse the above removing procedure.

and set the shorter end of the select lock arm spring
to the hook u on the top plate.

2.

Set the other longer end of the select lock arm spring
to the boss v on the underside of the select lock arm,
and join the select lock arm to the slots (joint t). Turn
the select lock arm as shown in the figure.

3.

Reattach the select arm (L) while setting the part r to
the first peak of the link plate gear, and join the joint
s.

CAUTION:

When reattaching the select arm (L),
check if the points w and x are correctly
fitted and if each part operates properly.

Joint r

Link plate

Link plate

Select lock arm spring

Boss v

Select arm (R)

Joint a'

Fig.22

Hook u

Joint t

Joint t

Select lock arm

Fig.23

Link plate spring

Select arm (L)

Joint b'

Fig.24

Joint r

Fig.25

Joint s

Select
lock arm

Point x

1-13

KD-SX927R

Removing the select arm (R) / link plate

(See Fig.21 and 22)

Prior to performing the following procedure, remove
the top plate assembly.

1.

Bring up the select arm (R) to release from the link
plate (joint y) and turn as shown in the figure to
release the two joints z and joint a’.

2.

Move the link plate in the direction of the arrow to
release the joint b’. Remove the link plate spring at
the same time.

REFERENCE:

Before removing the link plate, remove
the select arm (L).

Reattaching the Select arm (R) / link
plate (See Fig.25 and 26)

REFERENCE:

Reverse the above removing procedure.

Select arm (R)

Joint z

Link plate spring

Top plate

Joint a'

Part y

Link plate

Joint z

Joint s

Fig.21

Select lock arm

Select lock arm

Joint b'

Joint r

Select arm (L)

Select lock arm

q

Top plate

Hook u

Select lock
arm spring

1.

Reattach the link plate spring.

2.

Reattach the link plate to the link plate spring while
joining them at joint b’.

3.

Reattach the part y of the select arm (R) to the first
peak of the link plate while joining the two joints z
with the slots. Then turn the select arm (R) as shown
in the figure. The top plate is joined to the joint a’.

CAUTION:

When reattaching the select arm (R),
check if the part c’ is correctly fitted and
if each part operates properly.

Select arm (R)

Joint z

Link plate

Link plate spring

Joint a'

Part y

Part y

Fig.22

Joint b'

Joint z

Fig.25

Joints t

Select arm (L)

Select
lock arm

Point x

1-14

Link plate

Fig.26

KD-SX927R

Removing the loading roller assembly

(See Fig.27 to 29)

Prior to performing the following procedure, remove
the clamper assembly and the top plate assembly.

1.

Push inward the loading roller assembly on the gear
side and detach it upward from the slot of the joint d’
of the lock arm rivet assembly.

Detach the loading roller assembly from the slot of
the joint e’ of the lock arm rivet assembly.

The roller guide comes off the gear section of the
loading roller assembly.

Remove the roller guide and the washer from the
shaft of the loading roller assembly.

2.

Remove the screw I attaching the lock arm rivet
assembly.

3.

Push the shaft at the joint f’ of the lock arm rivet
assembly inward to release the lock arm rivet
assembly from the slot of the slide plate. Extend the
lock arm rivet assembly outward and release the
joint g’ from the boss of the chassis rivet assembly.
The roller guide springs on both sides come off.

Roller guide

Washer

Loading roller assembly

Roller guide

Joint e'

Roller guide spring

Roller guide spring

Joint d'

Loading roller assembly

Roller guide spring

Lock arm rivet assembly

Fig.27

Loading roller assembly

Roller guide
spring

CAUTION:

When reassembling, reattach the left
and right roller guide springs to the lock
arm rivet assembly before reattaching
the lock arm rivet assembly to the
chassis rivet assembly. Make sure to fit
the part h’ of the roller guide spring (L)
inside of the roller guide (Refer to
Fig.30).

Roller guide

Washer

Roller shaft assembly

Joint h'

Loading roller assembly

Roller guide
spring

Fig.28-1

Fig.28-2

Chassis rivet assembly

Boss

Slide plate

Roller guide spring

I

Frame

Loading roller

Roller guide spring

Lock arm rivet assembly

Joint f'

Part g'

Fig.29Fig.30

1-15

KD-SX927R

Removing the loading gear (5), (6) and
(7) (See Fig.31 and 32)

Prior to performing the following procedure, remove
the top cover, the chassis unit and the top plate
assembly.

1.

Remove the screw J attaching the loading gear
bracket. The loading gear (6) and (7) come off the
loading gear bracket.

2.

Pull out the loading gear (5).

Loading gear bracket

J

Loading gear (6)

Loading gear (5)

Loading gear (3)

Fig.31

J

Loading gear bracket

Loading gear (5)

Loading gear (6)

Loading gear (7)

Fig.32

1-16

Removing the gears (See Fig.33 to 36)

Prior to performing the following procedure, remove
the top cover, the chassis unit, the top plate
assembly and the pickup unit.

1.

Pull out the feed gear.

KD-SX927R

Slot j'

Slide plate

2.

Move the loading plate assembly in the direction of
the arrow to release the slide plate from the two slots
j’ of the chassis rivet assembly.

3.

Detach the loading plate assembly upward from the
chassis rivet assembly while releasing the joint k’.
Remove the slide hook and the loading plate spring
from the loading plate assembly.

4.

Pull out the loading gear (2) and remove the change
lock lever.

5.

Remove the E-washer and the washer attaching the
changer gear (2).

6.

The changer gear (2), the changer gear spring and
the adjusting washer come off.

7.

Remove the loading gear (1).

8.

Move the hang plate rivet assembly in the direction
of the arrow to release from the three shafts of the
chassis rivet assembly upward.

9.

Detach the loading gear plate rivet assembly from
the shaft of the chassis rivet assembly upward while
releasing the joint l’.

Feed gear

Change plate
rivet assembly

Shafts

E-washer

Loading plate assembly

Joint k'
Slot j'

Fig.33

Joint l'

Loading gear (4)

Loading gear plate
rivet assembly

Loading gear (2)

Loading gear (1)

Change gear (2)

10.

Pull out the loading gear (4).

Loading plate assembly

Loading plate spring

Slot j'

Chassis rivet assembly

Joint k'

Slide hook

Slide plate

Slot j'

E-washer

Washer

Loading gear (2)

Loading plate spring

Adjusting washer

Change plate
rivet assembly

Chassis rivet assembly

Fig.34

Loading gear (1)

Loading gear (2)

Change lock lever

Loading gear (4)

Loading gear plate rivet assembly

Fig.36Fig.35

1-17

KD-SX927R

Removing the turn table / spindle motor

(See Fig.37 and 38)

Prior to performing the following procedure, remove
the top cover, the connector assembly and the
chassis / clamper assembly.

1.

Remove the two screws K attaching the spindle
motor assembly through the slot of the turn table on
top of the body.

2.

Unsolder the wire on the connector board if
necessary.

K

Turn table

Fig.37

K

Turn table

1-18

Spindle motor

Fig.38

Adjustment method

KD-SX927R

Test instruments required adjustment

1.Digital oscilloscope (100MHz)

2.AM Standard signal generator

3.FM Standard signal generator

4.Stereo modulator

5.Electric voltmeter

6.Digital tester

7.Test disc(CTS-1000)

8.Extension cable for check
EXTGS004-22P

Standard measuring conditions
Power supply voltage DC 14.4V(11V to 16V allowance)
Load impedance 4 (4 to 8 allowance)
Line-out Level/Impedance
: 2.0 V/20k load(full scale)
Output impedance : 1k

Standard volume position
Balance and Bass & Treble volume : Indication "0"
Loudness : OFF

requency Band

F
FM 87.5kHz - 108.0 kHz

(MW) 522kHz - 16200kHz

AM

(LW) 144kHZ - 279kHz

Dummy load
Exclusive dummy load should be used for AM, and FM.
For 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 workingo
standard.

How to connect the extension cable for adjusting

Extension cables

EXTGS004-22P

CN501

CD Mechanism

Front panel ass'y

1-19

KD-SX927R

Flow of functional operation unit TOC read

Power ON

When the pickup correctly moves

v

to the inner area of the disc

Set Function CD

When the laser diode correctly

emits

Microprocessor
commands

FMO
TC94A14FA" 40"

FEED MOTOR
+TERMINAL
IC501"4"

REST SW

When correctly focused

FEO
TA2157" 15"

Focus Servo Loop ONo

$83

$82

$81

3.3V
Hi-Z
0V

6V
4V
2V

OFF
ON

Pickup feed to the inner area

2.2V

RF signal eye-patternn
remains closed

RF signal eye-pattern
opens

Disc inserted

YES

Laser emitted

Focus search

Disc rotates

Tracking loop closed

TOC read out

YES

Microprocessor
commands

SEL
TC94A14FA"38"

LD
CN501"15"

"No disc"

y

displa

When the disc correctly rotates

Microprocessor
commands

DMO
TC94A14FA"41"

Spindle
motor(-)
IC501"7"

$84 $86 $ A200

Acceleration Servo CLV

Rough
Servo

0.5 Sec 0.5 Sec

$84

3.3V
0V

4V
0V

3.3V

2.2V
0V

6V

3.2
2V

1-20

Jump to the first track

y

Pla

Tracking Servo Loop ON

RF signal

Rough Servo Modev

CLV Servo Mode
(Program Area)

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

Feed section

Is the voltage output at
IC541 pin "40" 5V or 0V?

YES

Is 4V present at both
sides of the feed motor?

YES

NO YES NO

NO

Is the wiring for IC541

(56)~(64) correct?

NO

Is 6V or 2V present at

IC501 "4" and "5"?

NO

Is 3.3V present at IC501

pin "20"?

Check the vicinity of

IC541.

YES

Check the feed motor

connection wiring.

YES

Check CD 8V

and 5V.

KD-SX927R

Check the feed motor.

Focus section

When the lens is

moving:

4V

Does the S-search

waveform appear at

IC501 pins "8" and "9"?

Spindle section

Is the disk rotated?

YES

Does the RF signal

appear at TP1?

YES

Is the RF waveform at TP1

distorted?

YES

Proceed to the Tracking

section

Check IC501.

NO

YES

NO

NO

NO

Check the circuits in
the vicinity of IC501
pins "8","9"and"15".

Check the pickup and

its connections

Is 4V present at IC501

pins "6" and "7"?

Check the spindle motor

and its wiring

Check the circuits in the

vicinity of IC521 "19"~

"24" or the pickup

YES

YES

NO

Is 4V present at IC541

pins "41" ?

Check the vicinity of

IC501.

NO

YES

Check IC541 and

IC521.

racking section

T

When the disc is rotated

Is the tracking error signal

output at IC521 "11"?

Check IC541.

at first:

Approx. 1.2V

YES

YES YES

Check the circuit in the

vicinity of IC521 pins

"2"~"12".

Check the pickup and

its connections

1-21

KD-SX927R

Maintenance of laser pickup

(1) Cleaning the pickup lens
Before you replace the pickup,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 patterrn) will be low.

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 of the power switch and, disconnect the
power cord.

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..

1-22

Play a disc.

Check the eye-pattern at TP1.

Finish.

Description of major ICs

HA13164A (IC901) : Regulator

1.Terminal layout

123456789101112131415

KD-SX927R

2.Block diagram

3.Pin function

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

TAB

note1) TAB (header of IC)

connected to GND

ILM AJGND GND

13

C2

0.1u

C:F

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.

1-23

KD-SX927R

UPD784216AGC157 (IC701): SYSTEM CPU

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

Symbol I/O Function

NC
NC
SW2
REST
LM0
LM1
NC
ANT CONT
VDD
X2
X1
VSS
XT2
XT1
RESET
SW1
BUS-INT
PS2

O
O

O
O
O
O

Signal input of mechanism switch 2 detection
Signal input of mechanism switch 3 detection
Signal input of mechanism switch 4 detection

I

Rest switch detection signal input

I

Loading side motor control signal output
Loading / feed motor selecting output.
Non connect
Antenna remote output
V connection
Connect to X'tal for main clock
Connect to X'tal for main ckock
GND connection
Connect to X'tal for sub clock
Connect to X'tal for sub clock
Reset detection terminal

I

Mechanism switch detection signal input

I

J-BUS signal interrupt input

I

POWER SAVE2. BACK UP and synchronization

I

Becomes stop mode because of the input of H.
19
20
21
22
23
24
25

NC
RDS-SCK
RDS DA
REMOCON
AVDD
AVREF0
VOL1

Output L

I

RDS clock input

I

RDS data input

I

Remote control signal input

I

5V connection

5V connection

Rotation volumepulse signal input

I

Pulse which actually becomes judgment of change
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

VOL2
KEY0
KEY1
KEY2
LEVEL
SQ
SM
AVSS
NC
NC
AVREF
BUS-SI
BUS-SO
BUS-SCK
BUS-I/O
LCD-DA
LCD-SCK
LCD-CE
BUZZER
E2PROM-DI
E2PROM-DO
E2PROM-CLK
OPEN
NC
NC

O
O

O

I/O

O
O
O
O

OI

O
O

O
O
O

Rotation volume pulse signal input

I

Key input 0

I

Key input 1

I

Key input 2

I

Level meter input

I

S.QUALITY level input

I

S.METER level input

I

GND connection

Non connect

Non connect

5V connection

J-BUS data input

I

J-BUS data output

J-BUS clock input & output

J-BUS I/O switch output. At output : H, At input : L

Data output to LCD driver

Clock output to LCD driver

Chipenable to LCD driver

Buzzer output

Communication data input of I2C

Communication data output of I2C

Communication data clock output I2C

I

Opening detection input

Non connect

Non connect

UPD784216AGC157(1/2)

1-24

Pin No.

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 I/O Function

NC
NC
SD/ST

O

Non connect

O

Non connect

I

Station detector and stereo signal input.

It is H and there is a bureau.It is L and a stereo.
NC
MONO

O

Non connect

O

Monaural ON/OFF switch output.

At the time of the MONO ON :H.
NC
NC
NC
NC
NC
DETACH

I

Non connect

I

Non connect

I

Non connect

I

Non connect

I

Non connect

I

Detach signal input. It is L of 200ms or more and an

operation mode. H:POWER SAVE
AFCK
SEEK/STP
NC
FM/AM
PLL-CE
PLL-DO
PLL-CLK
PLL-DI
TEL-MUTE

O

AF check output. AF check:L

O

Auto seek stop switch output. At SEEK:H. At STOP:L

O

Non connect

O

FM,AM switch output

O

CE output for IC control for PLL

O

Data output for IC control for PLL

O

Clock output for IC control PLL

I

Data output for IC control for PLL

I

Telephone mute detection input.

It is L or H and MUTE(ACTIVE depends on the PSM setting)
NC
VSS
DIM-IN
PS1

O

Non connect (ex:AMP-KILL output)

GND connection

I

Dimmer detection input. At L:dimmer ON.

I

POWER SAVE 1. ACC and synchronization

POWER SAVE : L. At operation:H
POWER
CD-ON
MUTE
NC
NC
NC
VDD
NC
VOL-DA
VOL-CLK
NC
NC
NC
NC
STAGE2
STAGE1
BUCK
CCE
RST
TEST
BUS0
BUS1
BUS2
BUS3
DISCSEL
CD-RW

O
O
O
O
O
O

O
O
O
O
O
O
O

I

I
O
O
O

I/O
I/O
I/O
I/O

O
O

POWER ON/OFF switch output. At POWER ON:H
The CD power supply control signal output. At CD :H
Mute output. At mute ON:L
Non connect
Non connect
Non connect
5V connection
Non connect
Data output by which IC for electronic volume is controlled
Clock output by which IC for electronic volume is controlled
Non connect
Non connect
Non connect
Non connect
H:for 992R L:for 921R
Pull down fixation
Clock output for data communication with CDLSI
CE output for data communication with CDLSI
CDLSI reset signal output
connects GND with 10k pull down (For flash switch)
Data communication input output port 0 with CDLSI
Data communication input output port 1 with CDLSI
Data communication input output port 2 with CDLSI
Data communication input output port 3 with CDLSI
Pull-down fixation
Rf gain control L=CD-RW H= CD-DA

KD-SX927R

UPD784216AGC157(2/2)

1-25

KD-SX927R

LA6579H-X (IC501) : 4-Channel bridge driver

1. Pin layout & Block diagram

VIN1-A

VIN1+A

VCCP1

1

­+

2

3

VIN1_SW
[H]: OP-AMP_A
[L]: OP-AMP_B

[H]

[L]

28

VIN1

27

VIN1-B

-

+

26

VIN1+B

VO+

VO-

VO2+

VO2-

FR

VO3+

VO3-

VO4+

4

5

6

7

FR

8

9

10

Power system
GND

Level shift

33k

11k

-

Signal system
power supply

25

S-GND

+

24

VIN1-SW

Level shift

­+

Level shift

Level shift

All outputs ON/OFF

H : ON

L : OFF

3.3VREG
(External:PTP Tr)

MUTE

Power system GND

Signal system
power supply

23

MUTE

22

VREFIN

FR

21

20

FR

VCCS

3.3VREG

+

-

19

REGIN

1-26

VO4-

VCCP2

VIN4

VIN4G

11

12

13

14

11k

33k

­+

33k

33k

18

VIN2G

11k

-

17

VIN2

+

16

VIN3G

11k

-

15

VIN3

+

2.Pin function

KD-SX927R

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
25
26
27
28

VIN1-A
VIN1+A
VCCP1
VO1+
VO1­VO2+
VO2­VO3+
VO3­VO4+
VO4­VCCP2
VIN4
VIN4G
VIN3
VIN3G
VIN2
VIN2G
REGIN

3.3VREG
VCCS
VREFIN
MUTE
VIN1_SW
S_GND
VIN1+B
VIN1-B
VIN1

Function
CH1 input AMP_inverted input
CH1 input AMP_non-inverted input
CH1 and CH2 power stage power supply
Output pin(+)for channel 1
CH1 output pin (-) for channel 1
Output pin(+)for channel 2
Output pin(-)for channel 2
Output pin(+)for channel 3
Output pin(-)for channel 3
Output pin(+)for channel 4
Output pin(-)for channel 4
CH3 and CH4 power stage powr supply
Input pin for channel 4
Input pin for channel 4(for gain adjustment)
Input pin for channel 3
Input pin for channel 3(for gain adjustment)
Input pin for channel 2
Input pin for channel 2(for gain adjustment)
External PNP transistor, base connection

3.3VREG output pin, external PNP transistor,collector connection
Signal system GND
Reference voltage application pin
Output ON/OFF pin
CH1 input OP AMP_changeover pin
Signal system GND
CH1 AMP_B non-inverted input pin
CH1 AMP_B inverted input pin
CH1 input pin, input OP_AMP output pin

1-27

KD-SX927R

TA2157FN-X(IC521):RF amp

1.Terminal layout

2.Block diagram

24 ~ 13

1 ~ 12

13

14

15

16

17

18

19

20

21

10pF

20k

20k

40k30k

20k 20k

15k

50 A

12k

12k

BOTTOM

PEAK

20k

20k

20k

PEAK

1.3V

40k

40k

240k

15pF

240k

15pF

50k

2k

20k

50k

14k

K

1

15k

x0.5
x2

x0.5
x2

1k

2k

1.75k

10pF

12

11

10

9

8

7

6

5

4

1-28

22

23

24

PIN SEL

VCTRLPIN

VCC

HiZ

GND

3k

3k

(APC SW)

APC ON

APC ON

APC OFF
(LDO=H)

180k

180k

40pF

TEB

(TE BAL)

-50%

0%

+50%

40pF

60k

60k

94k
22k

94k

22k

RFGC

(AGC Gian)

+12dB

+6dB

0dB

3

2

1

TEB

(TE BAL)

Normal mode

(0dB)

Normal mode

(0dB)

CD-RW mode

(+12dB)

3.Pin function

Pin No. Symbol I/O Function

1

VCC

2

FNI

3

FPI

4

TPI

5

TNI

6

MDI

7

LDO

8

SEL

-

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 amp 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.

KD-SX927R

TA2157FN-X

9

10
11

12
13

TEB

TEN
TEO

RFDC
GVSW

SEL
GND

Hiz
VCC

I

Tracking error balance adjustment signal input pin

APC
circuit

LDO

OFF Connected VCC through 1k resistor
ON
ON

Control signal output
Control signal output

Adjusts TE signal balance by ellminating carrier component from PWM
signal (3-state output,PWM carrier = 88.2kHz) output from TC94A14F/FA
TEBC pin using RC-LPF and inputting DC.
TEBC input voltage:GND~VCC

I

Tracking error signal genaration amp negative-phase input pin

O

Tracking error signal generation amp output pin.
Combining TEO signal RFRP signal with TC94A14F/FA configures tracking
search system.

O

RF signal peak detection output pin

I

AGC/FE/TE amp gain change pin

GVSW Mode
GND

Hiz

CD-RW
Normal

VCC

14
15

16
17

18
19
20

21
22
23
24

VRO
FEO

FEN
RFRP

RFIF
RFGO
RFGC

AGCIN
RFO
RFN
GND

O

Reference voltage (VRO) output pin
VRO=1/2VCC When VCC=3.3V

O

Focus error signal generation amp output pin

I

Focus error signal generation amp negative-phase input pin

O

Signal amp output pin for track count
Combining RFRP signal and TEO signal with TC94A14F/FA configures
tracking search system.

I

Signal generation amp input pin for track count

O

RF signal amplitude adjustment amp output pin

I

RF amplitude adjustment control signal input pin
Adjusts RF signal amplitude by eliminating carrier component from PWM
signal (3-state output,PWM carrier=88.2kHz)output fromTC94A14F/14FA
RFGC pin using RC-LPF and inputting DC.
RFGC input voltage:GND~VCC

I

RF signal amplitude adjustment amp input pin

O

RF signal generation amp output pin

I

RF signal generation amp input pin

-

GND pin

1-29

KD-SX927R

TA8273H(IC301):Power AMP

1.Block diagram

INRF

0.22 F

AC CONT1

INRR

0.22 F

+

Vcc 1/2 Vcc 3/4

2200 F 0.022 F

6 20

+

11

-

+

+

-

9

7

OUT RF+

OUT RF-

1

Protective

circuit

+

-

+

12

+

-

GND

8

OUTRR+

5

OUTRR-

3

GND

2

ST BY

REF

47 F

INLF

AC CONT2

PRE GND

INLR

+5V
ST ON

+

0.22 F

+

0.22 F

4

Stand by

Switch

Mute

10

+

Ripple

Filter

Mute

22

circuit

3.3 F

+

15

-

+

-

17

19

10K

+

OUTLF+

OUTLF-

Low Level
Mute ON

25

18

21

23

GND

OUTLR+

OUT LR-

13

14

Protective

circuit

-

+

+

-

1-30

ON TIME

22 F

Muting &

16

+

ON Time Control

Circuit

GND

24

2.Terminal layout

KD-SX927R

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.

AC CONT 1
GND
OUTRR­STBY
OUTRR+
VCC1/2
OUTRF­GND
OUTRF+
REF
INRF
INRR
PREGND
INLR
INLF
ONTIME
OUTLF+
GND
OUTLF­VCC3/4
OUTLR+
MUTE
OUTLR­GND
AC CONT 2

TA8273H

Function

Header of IC
Power GND
Outpur(-) for Rear Rch
Stand by input
Output (+) for Rear Rch
Power input
Output (-) for Front Rch
Power GND
Output (+) for Front Rch
Ripple filter
Front Rch input
Rear Rch input
Signal GND
Rear Lch input
Front Lch input
Power on time control
Output (+) for Front Lch
Power GND
Output (-) for Front Lch
Power input
Output (+) for Rear Lch
Muting control input
Output (-) for Rear Lch
Power GND
Header of IC

1-31

KD-SX927R

TC94A14FA (IC541) : DSP & DAC

1.Terminal layout & block daiagram

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

48 47 46 45 44 43 42 41 40 39

Clock

LPF

generator

Micro-

controller

interface

1-bit
DAC

Audio out

circuit

Address

circuit

circuit

Correction

Digital
output

16 k

RAM

PWM

Servo

control

ROM
RAM

CLV servo

Synchronous

guarantee

EFM

decoder

Sub code

decoder

38 37 36 35 34 33

D/A

A/D

Digital equalizer

automatic

adjustment circuit

Data
slicer

VCO

PLL

TMAX

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

64

2.Pin function

Pin

Symbol I/O Descroption

No

O

1
2

BCK

LRCK

Bit clock output pin.32fs,48fs,or 64fs selectable by command.

O

L/R channel clock output pin."L" for L channel and "H" for R channel. Output polarity
can be inverted by command.

O

3

AOUT

4

DOUT

5

IPF

Audio data output pin. MSB-first or LSB-first selectable by command.

O

Digital data output pin.Outputs up to double-speed playback.

O

Correction flag output pin. When set to "H", AOUT output cannot be corrected by C2

correction processing.
6
7
8
9

10
11
12
13
14
15

DD3

V

V

SS3

SBOK
CLCK

DATA
SFSY
SBSY

HSO

UHSO

DD3

PV

-

Digital 3.3V power supply voltage pin.

-

Digital GND pin.

O

Subcode Q data CRCC result output pin. "H" level when result is OK.

O

Subcode P-W data read I/O pin. I/O polarity selectable by command.

O

Subcode P-W data output pin.

O

Playback frame sync signal output pin.

O

Subcode block sync signal output pin. "H" level at S1 when subcode sync is detected.

I/O

General-purpose input / output pins.
Input port at reset.

-

PLL-only 3.3V power supply voltage pin.

17

161514131211101 2 3 4 5 6 7 8 9

1-32

Pin

Symbol I/O Description

No

16
17

PDO

TMAX

EFM and PLCK phase difference signal output pin.

O

TMAX detection result output pin.

O

KD-SX927R

TC94A14FA

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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

LPFN

LPFO

PVREF

VCOF

AVSS3

SLCO

RFI

AVDD3

RFCT

RFZI

RFRP

FEI

SBAD

TEI
TEZI
FOO
TRO

VREF
RFGC
TEBC

SEL

AVDD3

FMO

DMO

VSS3

VDD3

TESIN

XVSS3

XI

XO

XVDD3

DVSS3R

RO

DVDD3

DVR

LO

DVSS3L

ZDET
VSS5
BUS0
BUS1
BUS2
BUS3

BUCK

/CCE

/RST

VDD5

TMAX Detection Result
Longer than fixed period

Within fixed period
Shorter than fixed period

Inverted input pin for PLL LPF amp.

I

Output pin for PLL LPF amp.

O

PLL-only VREF pin.

­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.

­RF amplitude adjustment control signal output pin.

O

Tracking balance control signal output pin.

O

APC circuit ON/OFF signal output pin. At laser on, high impedance with UHS="L",

O

TMAX Output

DD3

"PV

"

"HiZ"

SS3

"AV

"

H output with UHS="H".
Analog 3.3V power supply voltage pin.

­Feed equalizer output pin.

O

Disc equalizer output pin.

O

Digital GND pin.

­Digital 3.3V power supply voltage pin.

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

I

System clock oscillator GND pin.

­System clock oscillator input pin.

I

System clock oscillator output pin.

O

System clock oscillator 3.3V power supply voltage pin.

­DA converter GND pin.

­R-channel data forward output pin.

O

DA converter 3.3V power supply pin.

­Reference voltage pin.

­L-channel data forward output pin.

O

DA converter GND pin.

­1 bit DA converter zero detection flag output pin.

O

Microcontroller interface GND pin.

­Microcontroller interface data I/O pins.

I/O

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".

I

Microcontroller interface 5V power supply pin.

-

1-33

KD-SX927R

LC75873NW(IC601):LCD Driver

1.Pin layout

60 41

61

80

1 20

3.Pin function

Pin No.

79,80
1,2,3
to 66

67
78
69

2.Block diagram

40

21

Pin name

S1/P1 TO S4/P4
S5 to S68

COM1
COM2
COM3

VDD1

VDD2

INH

OSC

VDD

VSS

I/O

O

O

S5

S4/P4

S3/P3

S2/P2

COM2

COM3

COMON
DRIVER

CLOCK

GENERATOR

COM1

S62

S66

DI

CL

SEGMENT DRIVER

SHIFT REGISTOR

ADDRESS

DETECTOR

CE

S1/P1

Description

Segment outouts for displaying the display data
transferred by serial data input.
The S1/P1 to S4/P4 pins can be used as general­purpose output ports under serial data control.

Common driver outputs.
The frame frequency f0 is given by :
f0 = (FOSC/384)Hz.

74

76
77
78

75

71

72

70

OSC

CE
CL
DI

INH

VDD1

VDD2

VDD

I/O

I
I
I

I

I

I

-

Oscillator connection
An oscillator circuit is formed by connecting an
external resistor and capacitor to this pin.

Serial data transfer inputs.
Connected to the controller.
CE:Chip enable
CL:Synchronization clock
DI:Transfer data

Display off control input
INH= "L"(VSS) Display forced off

S1/P1 to S4/P4 = "L"
(These pins are forcibly set to the
segment output port function and held
at the low level.)
S5 to S68 = "L"
COM1 to COM3"L"

INH = "H"(HDD) Display on
However, serial data transfer is possible when
the display is forced off by this pin.

Used for applying the LCD drive 2/3 bias voltage
externally. Must be connected to VDD2 when a
1/2 bias drive scheme is used.

Used for applying the LCD drive 1/3 bias voltage
externally. Must be connected to VDD1 when a
1/2 bias drive scheme is used.

Power supply connection.
Provide a voltage of between 3.0 and 6.0V.

1-34

73

VSS

Power supply connection. Connect to ground.

-

SAA6579T-X(IC71):RDS detecter

1.Pin layout

SCOUT

2.Block diagram

QUAL

DATA

Vref

MUX

GND

V

CIN

1
2
3
4

dd

5
6
7
8

CLK

16

T57

15

OSCO

14

OSCI

13

dd

V

12

GND

11

TEST

10

MODE

9

KD-SX927R

121413

3.Pin function

4

8

7

CLOCKED
COMPARATOR

5

3

REFERENCE
VOLT AGE

Pin No.

1
2
3
4

ANTI­ALIASING
FILTER

6 11

Symbol

QUAL
DATA
Vref
MUX

VP1

57 kHz
BANDPASS
(8th ORDER)

COSTAS LOOP
VARIABLE AND
FIXED DIVIDER

CLOCK
REGERATION
AND SYNC

RECONSTRUCTION
FILTER

TEST LOGIC AND OUTPUT
SELECTOR SWITCH

OSCILATOR
AND
DIVIDER

BIPHASE
SYMBOL
DECODER

9

10

Description

Quality indication output
RDS data output
Reference voltage output (0.5VDDA)
Multiolex signal input

QUALITY BIT
GENERATOR

DIFFERENTIAL
DECODER

1

2

15

15

5
6
7
8

9
10
11
12
13
14
15
16

Vdd
GND
CIN
SCOUT
MODE
TEST
GND
Vdd
OSCI
OSCO
T57
CLK

+5V supply voltage for analog part
Ground for analog part (0V)
Subcarrier input to comparator
Subcarrier output of reconstruction filter
Oscllator mode / test control input
Test enable input
Ground for digital part (0V)
+5V supply voltage for digital part
Oscillator input
Oscillator output
57 kHz clock signal output
RDS clock output

1-35

KD-SX927R

TB2118F-X (IC31) : PLL

1.Terminal Layout

2423222120191817161514

13

2.Block diagram

osc

2

1

XO

24

XI

FM VCO

AMVCO

IFC

CE

CK

DOUT

DOUT

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
No.

1
2
3
4
5
6
7
8

9
10
11
12

1-36

Symbol I/O Function

XOUT

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

HD74HC126FP-X (IC801) : Buffer

KD-SX927R

1.Terminal layout

1C

1

1A

2

1Y

3

2C

4

2A

5

2Y

6

GND

7

2.Block diagram

Input

VU

14

4C

13

4A

12

4Y

11

3C

10

3A

9

3Y

8

Vcc Vcc

1A
2A
3A
4A
1C
2C
3C

See Function Table

4C

3.Pin function

Output

1Y

Output

2Y

Output

3Y

Output

4Y

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

RPM7138-V4(IC602):Remote control receiver

LimiterAMP

I/V

BPF

Detection
crimp

Comparator

VCC

22K

R

OUT

1-37

KD-SX927R

BR24C16F-X (IC771) : EEPROM

1. Pin layout

VCC WP SCL SDA

A0 A1 A2

3. Block diagram

A0 1

A1 2

A2 3

11bit

Address
decoder

GND

11bit

START

Control circuit

2. Pin function

Symbol

VCC

GND

A0,A1,A2

SCL

SDA

WP

16kbit EEPROM allay

Slave W ard
Address resister

STOP

Acrobat-PDFAcrobat-PDFAcrobat-PDF

I/O

-

Power supply.

-

GND

I

No use connect to GND.

I

Serial clock input.

I/O

Serial data I/O of slave and ward address.

I

Write protect terminal.

8bit

Data
resister

ACK

Function

8 Vcc

7 WP

6 SCL

GND 4

High voltage osc circuit

Power supply
voltage det.

IC-PST600M/G/-W (IC702) : System reset

Co1

OP1

1

3

2

5 SDA

IN

Vout

GND

1-38

NJM4565M-WE (IC581) : Ope. amp

A OUTPUT

1

KD-SX927R

+

8

V

-

A INPUT

+

A INPUT

V

2

3

-

4

B OUTPUT

7

B INPUT

-

6

5

+

B INPUT

TDA7404D-X(IC161):Carradio signal processor

1.Terminal layout 2.Block diagram

1

14

28

15

Input Multiplexer

MIX

Gain/Auto Zero

Mono/Beep

Mixing Stage

Beep

Supply

Loudness

Volume

Soft Mute

Digital Control I C-Bus

Mono Fader
Mono Fader

Mono Fader

Treble

Bass

Zero Cross

2

Mono Fader

Mono Fader
Mono Fader

1-39

KD-SX927R

VICTOR COMPANY OF JAPAN, LIMITED

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

(No.49740)

200205