JVC KD-SX979R User manual

SERVICE MANUAL
CD RECEIVER
No.49548
Feb. 2000
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
This service manual is made from 100% recycled paper.
Printed in Japan
200002(O)
VICTOR COMPANY OF JAPAN, LIMITED
MOBILE ELECTRONICS DIVISION,10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan
KD-SX979R / KD-SX925R
KD-SX924R / KD-SX909R
(No.49548)
KD-SX979R / KD-SX925R
KD-SX924R / KD-SX909R
KD-SX979R / KD-SX925R
KD-SX924R / KD-SX909R
Area Suffix
E ---- Continental Europe
Contents
Safety precaution 1-2
Preventing static electricity 1-3
Instructions 1-4~20
Disassembly method 2-1
Adjustment method 2-6
Flow of functional operation
until TOC read 2-7
Maintenance of laser pickup 2-9
Description of major ICs 2-10
Block diagram 2-26
Standard schematic diagrams 2-27
Printed circuit boards 2-29~30
Parts list 3-1~16
KD-SX909R
KD-SX979R
KD-SX924R
KD-SX925R
45Wx4
TP
DISP
RPT
SSM
SCM
MO
RND
7 8 9 10 11 12
PTY
CD -CH
FM/AM CD
/I
ATT
/
5
˚
DAB
RDS
45Wx4
TP
DISP
RPT
SSM
SCM
MO
RND
7 8 9 10 11 12
PTY
CD -CH
FM/AM CD
/I
ATT
/
5
˚
DAB
RDS
45Wx4
TP
DISP
RPT
SSM
SCM
MO
RND
7 8 9 10 11 12
PTY
CD -CH
FM/AM CD
/I
ATT
/
5
˚
DAB
RDS
45Wx4
TP
DISP
RPT
SSM
SCM
MO
RND
7 8 9 10 11 12
PTY
CD -CH
FM/AM CD
/I
ATT
/
5
˚
DAB
RDS
KD-SX979R
KD-SX925R
KD-SX924R
KD-SX909R
Illumination color
COLOR
BLUE
RED
WHITE
Remote controller

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

Front bracket
CD mechanism
control board
Damper bracket
CD mechanism ass’y
FD screw
Feed motor ass’y
FD gear Pickup unit
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.
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
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
Soldering
Attention when traverse unit is decomposed
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.
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the substrate.

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-1
Disassembly method
Removing the front panel unit (See Fig. 1, 2)
1.Press the Eject button to open the front panel unit
2.Push and open the right and left open/close shaft arms
outward to remove the shaft.
3.Remove the front panel unit from the same side as the
shaft was removed.
1.Remove the front panel unit.
2.Remove the two screws Aattaching the front chassis
assembly.
3.Remove the four ribs aattaching the front chassis
assembly to the chassis.
Removing the front chassis assembly (See Fig. 3, 4)
Removing the bottom cover assembly
(See Fig. 5)
Turn the unit upside down,then insert and turn to
bthe screwdriver to remove the bottom cover.
Fig 5
Fig 1 Eject button
Front panel unit
Fig 2
Open/close
shaft arm
Fig 3 A
a
Fig 4 a
bb
b

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-2
1.Remove three screws Eretaining the rear panel to the
chassis
2.Remove one screw Cretaining the IC to the heat sink.
3.Remove two screws Dretaining the main board.
4.Lift up the main board to remove it.
5.Remove two screws Bto remove the heat sink.
Fig 9
Fig 8
J
JJ
B
B
C
Fig 6
KK
KKK
E
G
Fig 7-1
Fig 7-2
EEIHF
DD
Removing the main board(wiht rear panel)
(See Fig. 6, Fig. 7)
Remove five screws Kretaining the rear cover.
Front panel unit (See Fig.9)
Remove three mechanism mounting screws Jretaining the
top cover.
CD mechanism assembly (See Fig. 8)
1.Remove one screw I to remove the IC bracket.
2.Remove one screw Fto remove the line-out jack.
3.Remove one screw G to remove the antenna jack.
4.Remove one screw Hto remove the connector.
Removing the rear bracket (See Fig. 7)

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-3
Unsolder the part f and g on the CD mechanism
control board.
Remove the stator fixing the CD mechanism control
board and the damper bracket (To remove the stator
smoothly, pick up the center part).
Remove the screw F attaching the CD mechanism
control board.
Remove the CD mechanism control board in the
direction of the arrow while releasing it from the two
damper bracket slots i and the front bracket slot j.
Disconnect the flexible wire from connector on the
pickup unit.
Removing the CD mechanism control
board (See Fig.1 and 2)
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).
ATTENTION:
Fig.1
Fig.2
Fig.3
Fig.4
Front bracket
CD mechanism
control board
Shift the lock
Flexible wire
Pickup unit
FD gear
CD mechanism control board
Loading motor Front bracket
Front bracket Pull outward
Pull outward
Flame
Damper bracket
mm
h
i
g
f
II
I
CD mechanism ass’y
Fj
k
G
k
G

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-4
Prior to performing the following procedure, remove
the CD mechanism control board.
Remove the two springs k attaching the CD mechanism
ass’y and the front bracket.
Remove the two screws G and the front bracket
while pulling the flame outward.
Remove the belt and the screw H from the loading
motor.
*
1.
2.
3.
Removing the loading motor
(See Fig.3 to 5)
Prior to performing the following procedure, remove
the CD mechanism control PWB and the front
bracket (loading motor).
Remove the three screws I and the damper bracket.
Raise the both sides fix arms and move the fix plates
in the direction of the arrow to place the four shafts l
as shown in Fig.8 and 9.
Remove the CD mechanism ass’y and the two
springs m attaching the flame.
Remove the two screws J and both sides rear
damper brackets from the dampers. Detach the CD
mechanism ass’y from the left side to the right side.
*
1.
2.
3.
4.
Removing the CD mechanism ass’y
(See Fig.1, 6 to 9)
The CD mechanism ass’y can be
removed if only the rear damper
bracket on the left side is removed.
ATTENTION:
Fig.5
Fig.6
Fig.7
Fig.8
Fig.9
Rear damper bracket
Fix arm (R)
Damper
H
II
Loading motor
Belt
Damper bracket
CD mechanism ass’y
Flame m
m
I
I
Fix plate (L)
ll
Rear damper bracket
Fix arm (L)
Damper
J
Fix plate(R)
J
l
l

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-5
Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor) and the CD mechanism ass’y.
Remove the two screws K and the feed motor ass’y.
*
1.
Removing the feed motor ass’y
(See Fig.10)
*Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor), the CD mechanism ass’y and the
feed motor ass’y.
Detach the FD gear part of the pickup unit upward.
Then remove the pickup unit while pulling out the
part n of the FD screw.
*
1.
Remove the screw L attaching the nut push spring
plate and the pickup mount nut from the pickup unit.
Pull out the FD screw.
2.
Removing the pickup unit
(See Fig.10 and 11)
When reattaching the pickup unit,
reattach the part o of the pickup unit,
then the part n of the FD screw.
ATTENTION:
Prior to performing the following procedure, remove
the CD mechanism control board, the front bracket
(loading motor), the CD mechanism ass’y and the
feed motor ass’y.
Turn up the CD mechanism ass’y and remove the
two springs p on both sides of the clamper arms.
Open the clamper arm upward.
Turn the turn table, and remove the two screws M
and the spindle motor.
*
1.
2.
Removing the spindle motor
(See Fig.12 and 13)
Fig.10
Fig.11
Fig.12
Fig.13
Spindle motor
pp
Pickup unit
Part n
FD screw
Feed motor ass’y
FD gear Pickup unit
Part O
K
Nut push spring plate Pickup mount nut
Pickup unit
FD screw
L
M
M

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-6
Adjustment method
Test instruments required for 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.Tracking offset meter
8.Test Disc JVC :CTS-1000
9.Extension cable for check
EXTGS004-26P 1
Standard measuring conditions
Power supply voltage DC14.4V(10.5~16V)
Load impedance 20Kohm(2 Speakers connection)
Output Level Line out 2.0V (Vol. MAX)
How to connect the extension cable for adjusting
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 working
standard.
Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
BBE : OFF
Frequency Band
FM 87.5MHz ~ 108.0MHz
MW 522kHz ~ 1620 kHz
LW 144kHz ~ 279kHz
EXTGS004-26P

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-7
Power ON
Set Function to CD
Play
Jump to the first track
TOC readout
Tracking loop closed
Disc rotates
Disc inserted
YES
YES
Laser emitted
Pickup feed to the inner area
Focus search
RF signal eye-pattern
opens
RF signal eye-pattern
remains closed
"No disc"
display
•When correctly focused
Focus Servo Loop ON
•When the laser diode correctly
emits
Microprocessor
commands
Rough Servo Mode
CLV Servo Mode
(Program Area)
CLV Servo Mode
(Lead-In Area;
Digital: 0)
•RF signal
Flow of functional operation untilTOC read
•When the pickup correctly moves
to the inner area of the disc
TERMINAL
Microprocessor
commands
FMO
TC9462 "53"
FEED MOTOR
+TERMINAL
IC581 "5"
REST SW
•When the disc correctly rotates
Tracking Servo Loop ON
Servo CLV
Rough
Servo
AccelerationAcceleration
Microprocessor
commands
Spindle
motor (-)
IC581 "7"
0.5 Sec 0.5 Sec

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-8
Feed Section
Focus Section
Tracking Section
Spindle Section
Is the voltage output at
IC521 pin "53" 5V or 0V?
Check the feed motor.
Is 4V present at both
sides of the feed motor?
Is the wiring for IC521
(90) ~ (100) correct?
Check IC581.
Is 6V or 2V present at
IC581 "5" and "6"?
Is 5V present at IC581
pin "11"?
Check the feed motor
connection wiring.
Check the vicinity of
IC521.
Check CD 9V
and 5V.
YES
YES
YES
NONO
NO
NO
NO
YES
YES
When the lens is
moving: Check the circuits in
the vicinity of IC581
pins "15" ~ "18".
Check the pickup and
its connections.
NO
YES
YES
YES
Does the S-search
waveform appear at
IC581 pins "17" and "18"?
Is the disk rotated?
Does the RF signal
appear at TP1?
Is 4V present at IC581
pins "7" and "8" ?
Check the spindle motor
and its wiring.
Is 4V present at IC521
pin "55" ?
Check the vicinity of
IC581.
Check IC501 and
IC521.
YES
NO
NO
NO
NO NO
YES
YES
YES
Check the circuits in the
vicinity of IC501 "19" ~
"24" or the pickup
Is the RF waveform at TP1
distorted?
Proceed to the Tracking
section
When the disc is rotated
at first: Check the circuit in the
vicinity of IC501 pins
"2" ~ "12".
Check IC521.
Check the pickup and
its connections.
YESYES
YES
Is the tracking error signal
output at IC501 "12"?
Approx. 1.2 V
4V

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-9
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.
Replacement of laser pickup
Is RF output
1.0 0.35Vp-p? Replace it.
NO
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.
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.

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-10
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
SW2
SW3
SW4
REST
LM0
LM1
NC
NC
VDD
X2
X1
VSS
XT2
XT1
RESET
SW1
BUSINT
PS2
CRUISE
RDSSCK
RDSDA
REMOCON
AVDD
AVREF0
VOL1
VOL2
KEY0
KEY1
KEY2
LEVEL
SQ
SM
AVSS
NC
NC
AVREF
Detection switch of CD mechanism
Detection switch of CD mechanism
Detection switch of CD mechanism
Reset signal input from CD mechanism
Loading motor control signal output
Loading motor control signal output
Non connect
Non connect
Power supply terminal
Connecting the crystal oscillator for system main clock
Connecting the crystal oscillator for system main clock
Power supply terminal
Connecting the crystal oscillator for system sub clock
Connecting the crystal oscillator for system sub clock
System reset signal input
Detection switch of CD mechanism
Cut-in input for J-BUS signal
Power save 2, Working together back up by H input, to stop mode
Pulse signal input port for Cruise control
Clock signal input for RDS
RDS data input
Remote control signal input
Power supply terminal
Power supply terminal
Input for rotation volume detection pulse judgment to relationV1
Input for rotation volume detection pulse judgment to relationV2
Key control signal input 0
Key control signal input 1
Key control signal input 2
Signal input port of level meter
Signal quality level input
Signal meter level input
Connect to GND
Non connect
Non connect
Power supply terminal
I
I
I
I
O
O
-
-
-
-
-
-
-
-
I
I
I
I
I
I
I
I
-
-
I
I
I
I
I
I
I
I
-
-
-
-
Pin No. Symbol I/O Function
UPD784215GC-158 (IC701) : CPU
75 ~ 51
1 ~ 25
76
100
50
26
~ ~
1.Terminal Layout
2.Pin Function (1/2)
Description of major ICs

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-11
37
38
39
40
41
42
43
44
45
46
47
48
49~52
53
54
55
56~60
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
86~89
90
91
92
93
94
95~98
99
100
BUSSI
BUSSO
BUSSCK
BUSI/O
LCDDA
LCDSCK
LCDCE
BUZZER
EPROMDI
EPROMDO
EPROMCK
OPEN
NC
SD/ST
LOCAL
MONO
NC
DETACH
AFCK
SEEK/STOP
NC
FM/AM
PLLCE
PLLDA
PLLCK
PLLDI
TELMUTE
NC
VSS
DIMIN
PS1
POWER
CDON
MUTE
NC
NC
NC
VDD
NC
VOLDA
VOLCL
DIMMER
NC
STAGE
BUCK
CCE
RST
TEST
BUS0~3
DISCSEL
J/E
J-BUS data input
J-BUS data output
J-BUS Clock signal I/O
I/O selector output for J-BUS, H:OUT L:IN
Data output to LCD driver
Clock output to LCD driver
Chip enable output to LCD driver
BUZZER control signal output
EPROM data input
EPOM data output
EPROM clock output
Detect for front face open and shut input, H:OPEN L:SHUT
Non connect
Station detector, Stereo signal input, H:Find Station L:Stereo
Local on off switching output
Monaural ON/OFF selecting output, H:MONO ON
Non connect
Input for detach signal, To action mode of L ,
Non connect
Auto seek/stop selecting output, H:Seek L:Stop
Non connect
Selecting output for FM/AM, L:FM H:AM
CE output for IC control for PLL
Data output for IC control for PLL
Clock output for IC control for PLL
Data input from IC21
Telephone mute signal detection output
Non connect
Connect to GND
DIMMER signal input port
Power supply terminal
Selecting output for power ON/OFF, H:power ON
Power supply control signal for CD H:CD
MUTE output, L:MUTE ON
Sub woofer cut off frequency output 1
Sub woofer cut off frequency output 2
MUTE output for Sub woofer
Power supply terminal
Non connect
Data output for IC control for electronic volume
Clock output for IC control for electronic volume
Dimmer signal output
Non connect
Pull up
Micon interface clock output terminal
Command and data sending/receiving chip enable signal output
Reset signal output terminal reset at "L" level
Connect to GND
Micon interface data input/output terminal
Disc select signal output
Pull down
I
O
I/O
O
O
O
O
O
I
O
O
I
O
I
O
O
I
I
O
O
-
O
O
O
O
I
O
O
I
I
O
O
O
O
O
O
O
O
O
O
O
I
O
O
O
-
I/O
O
I
Pin No. Symbol I/O Function
Pin Function (2/2)

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-12
~
~
114
28 15
LA6557-X(IC501):Driver
1.Terminal layout
2.Block diagram
VCC2 1
2
3
4
5
6
7
8
9
10
11
12
13
14
V05-
V05+
V04+
V04-
V03+
V03-
FR FR
28
27
26
25
24
23
22
21
20
19
18
17
16
15
FR
V02+
V02-
V01+
V01-
VCC1
VIN1+
VIN1-
REV
FWD
S-GND
MUTE
VIN+
VIN4-
VCC-S
FR
VREF-IN
REG-OUT
REG-IN
VIN3-
VIN3+
VIN2-
VIN2+
INPUT
MUTE
Thermal shutdown
Output control Level Shift Level Shift Level Shift Level Shift
CH3,4,5
POWER
CH5
CH4
CH3
CH2
CH1
MUTE is as follows:
High : Output ON
Low : Output OFF
22K 11K
Signal System Power
CH1,2
Power 22K
22K
22K
11K
11K
11K
SVREG (External PNPTr)

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-13
Pin NO. Symbol 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
26
27
28
VCC2
V05-
V05+
V04+
V04-
V03+
V03-
V02+
V02-
V01+
V01-
VCC1
VIN1+
VIN1-
VIN2+
VIN2-
VIN3+
VIN3-
REG-IN
REG-OUT
VREF-IN
VCC-S
VIN4-
VIN4+
MUTE
S-GND
FWD
REV
Power for channels 3,4, and 5 (VCC1 and VCC-S short-circuited)
Loading output (-)
Loading output (+)
Output pin (+) for channel 4
Output pin (-) for channel 4
Output pin (+) for channel 3
Output pin (-) for channel 3
Output pin (+) for channel 2
Output pin (-) for channel 2
Output pin (+) for channel 1
Output pin(-) for channel 1
Power for channels 1 and 2 (BTL), (VCC-S and VCC2 short-circuited)
Input pin for channel 1
Input pin for channel 1 (for gain control)
Input pin for channel 2
Input pin for channel 2 (for gain control)
Input pin for channel 3
Input pin for channel 3 (for gain control)
Regulator pin (External PNP base)
Regulator pin (External PNP collector)
Reference voltage input pin
Signal system power (VCC andVCC2 short-circuited)
Input pin for channel 4 (for gain control)
Input pin for channel 4
Output ON/OFF, channels 1 to 4 (BTL AMP)
Signal system GND
5CH(VL0) Output change pin (FWD), Logic input for loading block
5CH(VL0) Output change pin (REV), Logic input for loading block
The center frame (FR) functions as power system GND. Set this to the minimum potential together with S-GND.
Short-circuit three pins of power system, VCC-S,VCC1, and VCC2, externally before use.
3.Pin function
LA6557-X(2/2)

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-14
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
TEST0
HSO
UHSO
EMPH
LRCK
Vss
BCK
AOUT
DOUT
MBOV
IPF
SBOK
CLCK
Vdd
Vss
DATA
SFSY
SBSY
SPCK
SPDA
COFS
MONIT
Vdd
TESIO0
P2VREF
HSSW
ZDET
PDO
TMAXS
TMAX
LPFN
LPFO
PVREF
VCOREF
VCOF
AVss
SLCO
RFI
AVDD
Test mode terminal. Normally, keep at open
Playback speed mode flag output terminal
Playback speed mode flag output terminal
Sub code Q data emphasis flag output terminal. "H"=ON "L"=OFF
Channel clock output terminal.(44.1kHz) "H"=Rch "L"=Lch
Digital GND terminal
Bit clock output terminal. (1.4122MHz)
Audio data output terminal
Digital data output terminal
Buffer memory over signal output terminal.
Correction flag output terminal
Sub code Q data CRCC check adjusting result output terminal. "H"=result OK
Sub code P~W data readout input/output terminal
Digital power supply voltage terminal
Digital GND terminal
Sub code P~W data output terminal
Play-back frame sync signal output terminal
Sub code block sync signal output terminal
Processor status signal readout clock output terminal
Processor status signal output terminal
Correction frame clock output terminal (7.35kHz)
Internal signal (DSP internal flag and PLL clock) output terminal
Digital power supply voltage terminal
Test input/output terminal. Normally, keep at "L" level
PLL double reference voltage supply terminal
2/4 times speed at "Vref" voltage
1bit DA converter zero detect flag output terminal
Phase difference signal output terminal of EFM signal and PLCK signal
TMAX detection result output terminal. Selected by command bit (TMPS)
TMAX detection result output terminal. Selected by command bit (TMPS)
LPF amplifier inverting input terminal for PLL
LPF amplifier output terminal for PLL
PLL reference voltage supply terminal
VCO center frequency reference level terminal
VCO filter terminal
Analog GND terminal
Data slice level output terminal
RF signal input terminal
Analog power supply voltage terminal
I
O
O
O
O
-
O
O
O
O
O
O
I/O
-
-
O
O
O
O
O
O
O
-
I
-
O
O
O
O
O
I
O
-
I
O
-
O
I
-
Pin No. Symbol I/O Function
TC9462F (IC541) : DSP & DAC
2.Pin Function (1/2)
80 ~ 51
1 ~ 30
81
100
50
31
~ ~
1.Pin Layout

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-15
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58~61
62
63
64~67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87~89
90~93
94
95
96
97
98
99
100
RFCT
RFZI
RFRP
FEI
SBAD
TSIN
TEI
TEZI
FOO
TRO
VREF
RFGC
TEBC
FMO
FVO
DMO
2VREF
SEL
FLGA~D
VDD
VSS
IO0~3
DMOUT
CKSE
DACT
TESIN
TESIO1
VSS
PXI
PXO
VDD
XVSS
XI
XO
XVDD
DVSR
RO
DVDD
DVR
LO
DVSL
TEST1~3
BUS0~3
VDD
VSS
BUCK
CCE
TEST4
TSMOD
RST
RFRP signal center level input terminal
RFRP zero cross input terminal
RF ripple signal input terminal
Focus error signal input terminal
Sub-beam adder signal input terminal
Test input terminal Normally, keep at "vref" level
Tracking error signal input terminal.Take in at tracking servo ON.
Tracking error zero cross input terminal
Focus servo equalizer output terminal
Tracking servo equalizer output terminal
Analog reference voltage supply terminal
RF amplitude adjustment control signal output terminal
Tracking balance control signal output terminal
Feed equalizer output terminal
Speed error signal or feed search equalizer output terminal
Disk equalizer output terminal (PWM carrier=88.2kHz for DSP, Synchronize to PXO)
Analog double reference voltage supply terminal
APC circuit ON/OFF indication signal output terminal
External flag output terminal for internal signal
Digital power supply voltage terminal
Digital GND terminal
General I/O terminal
This terminal control IO0~IO3 terminal
Normally, keep at open
DAC test mode terminal. Normally, keep at open
Test input terminal, Normally, keep at "L" level
Test input/output terminal. Normally, keep at "L" level
Digital GND terminal
Crystal oscillator connecting input terminal for DSP
Crystal oscillator connecting output terminal for DSP
Digital power supply voltage terminal
Oscillator GND terminal for system clock
Crystal oscillator connecting input terminal for system clock
Crystal oscillator connecting output terminal for system clock
Oscillator power supply voltage terminal for system clock
Analog GND terminal for DA converter (Rch)
R channel data forward output terminal
Analog supply voltage terminal for DA converter
Reference voltage terminal for DA converter
L channel data forward output terminal
Analog GND terminal for DA converter (Lch)
Test mode terminal . Normal keep at open
Micon interface data input/output terminal
Digital power supply voltage terminal
Digital GND terminal
Micon interface clock input terminal
Command and data sending/receiving chip enable signal input terminal
Test mode terminal. Normal, keep at open
Local test mode selection terminal
Reset signal input terminal. Reset at "L" level
I
I
I
I
I
I
I
I
O
O
-
O
O
O
O
O
-
O
O
-
-
I/O
I
I
I
I
I
-
I
O
-
-
I
O
-
-
O
-
-
O
-
I
I/O
-
-
I
I
I
I
I
Pin No. Symbol I/O Function
2.Pin Function (2/2)

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-16
1
2
3
4
8
7
6
5
8
7
6
5
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
WP
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
SDA SCL
Vcc
Vss
XDEC
HV GENERATOR
EEPROM ARRAY
(8x256x8)
PAGE LATCHES
YDEC
SENSE AMP
R/W CONTROL
Symbol
Vss
SDA
SCL
WP
Vcc
AO,A1,A2
Function
Ground
Serial address/data I/O
Serial clock
Write protect input
+2.5V to 5.5V power suply
No internal connection
24LC16B-I/SN-X (IC771) : EEPROM
1. Pin layout
3. Pin function
2. Block diagram
AMP AGC
Detector
BPF
I/V
conversion
PD
Vcc
Comp 22k
ohm
magnetic shield
Vcc
Rout
GND
for
trimming
circuit
RPM6938-SV4 (IC602) : Remote control receiver

KD-SX979R/KD-SX925R
KD-SX924R/KD-SX909R
2-17
1234 56789101112
BA4905-V3 (IC901) : Regulator
1.Terminal layout
2.Block diagram
EXT
EXT ACC AUDIO 9V CTRL ILM 10V GND
RESET
RESET COMP VDD 5.7V CD 8V VCC AJ
1 2 3 4 5 6 7 8 9 10 11 12
37K
5K
REGULATOR
Overvoltage protection circuit
Pin no. Symbol Function
RESET
EXT output
COMP output
ACC
VDD output
AUDIO output
CD output
CTRL
VCC
ILM output
AJ
GND
1
2
3
4
5
6
7
8
9
10
11
12
If VDD voltage becomes 4V or less.RESET output becomes low level.
This output voltage is approximately 0.5V lower thanVCC.and max
output current is 300mA.
A voltage supply for ACC block.This output voltage is approximately
0.7V lower thanVDD'S.The max output current is 100mA.
Control of the COMP output by inputting voltage.
This output voltage is 5.7V, and max output current is 100mA.
This voltage supply is for microcomputer.Whenever back up voltage
supply is connected, the output keeps on running.
This output voltage is 9.0v, and max output current is 500mA.
This voltage supply for AUDIO.
This output voltage is 8.0V, and max output current is 1A.
This voltage supply for CD.
Output selector of CD. AUDIO, ILM and EXT.
To be connected with the BACK UP of car.
This output voltage is 10V, and max output current is 500mA.
Output voltage is adjustable.
Putting a resistance between ILM and AJ or between AJ and GND
makes ILM output voltage adjustable.
Ground.
3.Pin function