Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
Flow of functional
operation unit TOC read
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-3
1-4
1-11
1-12
Area Suffix
J ----Northern America
Maintenance of laser pickup
Replacement of laser pickup
Discription of major ICs
1-14
1-14
1-15
No.49670
Dec. 2001
KD-S700GN/KD-S700BU
KD-S7250
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
KD-S700GN/KD-S700BU
KD-S7250
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
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.
(conductive sheet) or iron plate
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
KD-S700GN/KD-S700BU
KD-S7250
Disassembly method
<Main body>
Removing the front panel assembly
(See Fig.1)
1.
Press the eject button in the lower right part of the
front panel. Remove the front panel assembly from
the body.
Front panel assembly
Eject button
Fig.1
Removing the front chassis assembly
(See Fig.2 and 3)
Prior to performing the following procedure, remove
the front panel assembly.
1.
Release the four joint tabs a on both sides of the
front chassis assembly and remove the front chassis
assembly toward the front.
Tab a
Tab a
Front chassis assembly
Heat sink
Fig.2
Tab a
1-4
Fig.3
Tab a
Front chassis
assembly
Removing the heat sink (See Fig.4)
1.
Remove the three screws A on the left side of the
body.
KD-S700GN/KD-S700BU
KD-S7250
Removing the bottom cover
(See Fig.5 and 6)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly
and the heat sink.
1.
Turn over the body and unjoint the five joints b with
the bottom cover and the body using a screwdriver.
A
Joints b
Joint b
Heat sink
Fig.4
Rear panel
Fig.5
A
Bottom cover
Joints b
Bottom cover
Joints b
Joints b
Joint b
Rear panel
Fig.6
1-5
KD-S700GN/KD-S700BU
KD-S7250
Removing the main board
(See Fig.7 and 8)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink and the bottom cover.
1.
Remove the screw B, the four screws C and the
three screws D attaching the rear bracket on the
back of the body. Remove the rear panel.
2.
Remove the two screws E attaching the main board
on the bottom of the body. Disconnect connector
CN501 on the main board in the direction of the
arrow.
D
E
Rear panel
CC
D
Fig.7
Main board
B
C
D
E
Removing the CD mechanism section
(See Fig.9)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink, the bottom cover and the main board.
1.
Remove the three screws F attaching the CD
mechanism section on the back of the top chassis.
CN501
F
Fig.8
CD mechanism section
F
Fig.9
F
Top chassis
1-6
KD-S700GN/KD-S700BU
KD-S7250
Removing the control switch board
(See Fig.10 to 12)
Prior to performing the following procedure, remove
the front panel assembly.
1.
Remove the four screws G attaching the rear cover
on the back of the front panel assembly.
2.
Unjoint the twelve joints c with the front panel and
the rear cover.
3.
Remove the control switch board on the back of the
front panel.
Joints c
Front panel
G
G
Rear cover
Fig.10
Joints c
G
G
Joints c
Front panel
Rear cover
Joints c
Fig.11
Control switch board
Fig.12
1-7
KD-S700GN/KD-S700BU
KD-S7250
<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
FD gear
f
B
Loading motor
Pull outward
Fig.2
CD mechanism control board
f
B
Front bracket
Fig.3
Front bracket
Pull outward
1-8
Fig.5
Belt
Flame
Fig.4
KD-S700GN/KD-S700BU
KD-S7250
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
e
b
Damper bracket
D
Fig.6
a
h
c
D
d
CD mechanism
control board
h
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
Damper
g
g
Fig.9
1-9
KD-S700GN/KD-S700BU
KD-S7250
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
1-10
H
Fig.13
Adjustment method
KD-S700GN/KD-S700BU
KD-S7250
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(11V~16V allowance)
Load impedance: 4 (4 to 8 allowance)
Line-out Level/impeadance:
2.0V/20k load(full scale)
Output Impedance: 1k
Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
BBE : NO BBE
Frequency Band
FM 87.5MHz ~ 107.9MHz
AM 530kHz ~ 1710 kHz
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.
How to connect the extension cable for adjusting
EXTGS004-26P
1-11
KD-S700GN/KD-S700BU
KD-S7250
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
• When the laser diode correctly
emits
Microprocessor
commands
FMO
TC9490FA "40"
FEED MOTOR
+TERMINAL
TERMINAL
IC561 "6"
REST SW
• When correctly focused
FEO
TA2147F
Focus Servo Loop ON
3.3v
Pickup feeds to the inner area
1.6V
RF signal eye-pattern
remains closed
RF signal eye-pattern
opens
Disc inserted
YES
Laser emitted
Focus search
Disc rotates
Tracking loop closed
TOC readout
YES
Microprocessor
commands
TC9490FA
"38"
"1"
"No disc"
display
• When the disc correctly rotates
Microprocessor
commands
"41"
Spindle
motor (-)
IC561 "4"
AccelerationAcceleration
0.5 Sec
Rough
Servo
0.5 Sec
Servo CLV
3.3V
1.6V
1-12
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)
Feed Section
Is the voltage output at
IC521 pin "40" 3.3V or 0V?
YES
Is 4V present at both
sides of the feed motor?
YES
NO
Is the wiring for IC521
(57) ~ (63) correct?
NO
Is 6V or 2V present at
IC561 "6" and "7"?
NO
YES
YES
Is 3.3V present at
IC561 pin "20"?
YES
Check the vicinity of
IC521.
Check the feed motor
connection wiring.
KD-S700GN/KD-S700BU
KD-S7250
NONO
Check CD 9V
and 5V.
Check the feed motor.
Focus Section
When the lens is
moving:
Does the S-search
waveform appear at
IC561 pins "8" and "9"?
Spindle Section
Is the disk rotated?
YES
Does the RF signal
appear at TP1?
YES
4V
Check IC561.
NO
YES
NO
NO
Check the circuits in
the vicinity of IC561
pins "15" ~ "18".
Check the pickup and
its connections.
Is 4V present at IC561
pins "4" and "5" ?
Check the spindle motor
and its wiring.
YES
YES
NONO
Is 3.3V present at
IC521 pin "41" ?
YES
Check the vicinity of
IC581.
Check IC501 and
IC521.
Is the RF waveform at TP1
normal?
YES
Proceed to the Tracking
section
Tracking Section
When the disc is rotated
at first:
Is the tracking error signal
output at IC501 "11"?
Check IC521.
NO
Approx. 0.8 V
YES
Check the circuits in the
vicinity of IC501 "2" ~ "7"
"18" ~ "23"or the pickup
Check the circuit in the
vicinity of IC501 pins
"2" ~ "7","10","11
YESYES
Check the pickup and
its connections.
1-13
KD-S700GN/KD-S700BU
KD-S7250
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.
Normal
1.3 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.
1-14
Play a disc.
Check the eye-pattern at TP1.
Finish.
Description of major ICs
HA13164A(IC901):Regulator
1.Terminal layout
1 2 3 4 5 6 7 8 9 101112131415
KD-S700GN/KD-S700BU
KD-S7250
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
C8
0.1u
C1
100u
VCCACC
8
2
1
7
Surge Protector
BIASTSD
15
3
TA B
note1) TAB (header of IC)
connected to GND
ILM AJGNDGND
13
C2
0.1u
C:F
3.Pin function
Pin No.SymbolFunction
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.
APC circuit ON/OFF control signal,laser diode (LDO) control signal input or
bottom/peak detection frequency change pin.
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
Connected to Vcc
through 1k resistor
Control signal output
ON
Control signal output
ON
LDOSEL
TA2147F-X
14
15
16
17
18
19
20
21
22
23
24
VRO
FEO
FEN
RFRP
RFRPIN
RFGO
RFGC
AGCIN
RFO
RFN
GND
ModeGVSW
GND
HIZ
Vcc
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
-
CD-RW
CD-DA
CD-DA
1-19
KD-S700GN/KD-S700BU
/
KD-S7250
TC9490FA(IC521):DSP&DAC
1.Terminal layout & block daiagram
DV
SS3
RO
DV
DD3
DVR
LO
DV
SS3
ZDET
V
SS5
BUS0
BUS1
BUS2
BUS3
BUCK
/CCE
/RST
VXDD3XOXI
SS3
XV
TEIN
DD3VSS3
V
DMO
FMO
DD3
AV
SEL
TEBC
RFGC
48474645444342414039383736353433
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
REF
V
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
AV
DD3
RFI
SLCO
AV
SS3
VCOF
RV
REF
LPFO
LPFN
1-20
64
V
DD5
17
TMAX
12345678910111213141516
BCK
LRCK
AOUT
DOUT
IPF
DD3
V
V
SBOK
CLCK
DATA
SFSY
SBSY
/HSO
UHSO
DD3
PV
PDO
SS3
KD-S700GN/KD-S700BU
KD-S7250
2.Pin function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Symbol
BCK
LRCK
AOUT
DOUT
IPF
VDD3
VSS3
SBOK
CLCK
DATA
SFSY
SBSY
/HSO
/UHSO
I/O
Function
O
Bit clock outputpin 32fs, 48fs, or 64fs selectable by command.
O
L/R channel clock output pin."L" for L channe and "H" for R channel.
Output polarity can be inverted by command.
O
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.
-
Digital 3.3V power supply voltage pin.
-
Digital GND pin.
O
Subcode Q data CRCC result output pin."H" level when result is OK.
I/O
Subcode P-W data read clockI/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.
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.
Test input pin. Normally,fixed to "L".
System clock oscillator GND pin.
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.
Microcontroller interface clock input pin.
Microcontroller interface chip enable signal input pin.At "L".
Bus0 to BUS3 are active.
Reset signal input pin. At reset,"L".
Microcontroller interface 5V power supply pin.
1-22
BD3860K (IC161):E.Vol&LOUD
1.Terminal layout
33 23
KD-S700GN/KD-S700BU
KD-S7250
2.Block diagram
GND FIL VCCSEL1
6 5 94036 353433283231302919 1514
POWER
SUPPLY
A1
41
B1
42
C1
43
D1
44
INPUT
1
2
3
4
SELECTOR
A2
B2
C2
D2
34
44
1 11
INPUT
GAIN
0 18 dB
INPUT
GAIN
0 18 dB
22
12
VIN1 LOUD1HF1 LF1 DET1TIN1 TNF1BNF1
MAIN
VOLUME
0 -40 dB
LOUDNESS
MAIN
VOLUME
0 -40 dB
LOUDNESS
LOW(f=50Hz) 6dB
PROCESS CONTROL +3 to 12dB
(f=10kHz)
LOGIC
LOW(f=50Hz) 6dB
PROCESS CONTROL +3 to 12dB
(f=10kHz)
TREBLE
-14 +14dB
TREBLE
-14 +14dB
-14 +14dB
-14 +14dB
BASS
BASS
BOUT1VCA1 MIX1 BBOUT1
FADER
CH1 FRONT
0 -5 dB
FADER
CH1 REAR
0 -5 dB
FADER
CH2 REAR
0 -5 dB
FADER
CH2 FRONT
0 -5 dB
OUTF1
13
OUTR1
12
SI
7
8
SC
37
OUTR2
10
OUTF2
11
3.Pin function
Pin
SymbolFunction
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
A2
B2
C2
D2
FIL
GND
SI
SC
VCC
OUTR2
OUTF2
OUTR1
OUTF1
BOUT1
BNF1
BOUT2
BNF2
TNF2
TNF1
TIN2
BBOUT2
MIX2
CH2 Input Pin A
CH2 Input Pin B
CH2 Input Pin C
CH2 Input Pin D
1/2 VCC Pin
Ground Pin
Serial Data Receiving Pin
Serial Clock Receiving Pin
Power Supply Pin
CH2 Rear Output Pin
CH2 Front Output Pin
CH1 Rear Output Pin
CH1 Front Output Pin
CH1 Bass Filter Setting Pin
CH1 Bass Filter Setting Pin
CH2 Bass Filter Setting Pin
CH2 Bass Filter Setting Pin
CH2 Treble Filter Setting Pin
CH1 Treble Filter Setting Pin
CH2 Treble Input Pin
CH2 BBE II Signal Output Pin
CH2 Output MIX Amplifier
Inverse Input Pin
39383725 24 26 23 22 2120 181716
Pin
SymbolFunction
No.
23
24
25
26
27
28
29
30
BBOUT1
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VCA2
LF2
HF2
DET2
DEF
DET1
TIN1
MIX1
VCA1
LF1
HF1
LOUD1
VIN1
LOUD2
VIN2
SEL2
SEL1
A1
B1
C1
D1
CH2 High Pass VCA Output Pin
CH2 Low Pass Filter Setting Pin
CH2 High Pass Filter Setting Pin
CH2 High Pass Attack/Release Time Setting Pin
BBE ON/OFF switching time constant pin
CH1 High Pass Attack/Release Time Setting Pin
CH1 treble Input Pin
CH1 BBE II Signal Output Pin
CH1 Output MIX Amplifier Inverse Input Pin
CH1 High Pass VCA Output Pin
CH1 Low Pass Filter Setting Pin
CH1 High Pass Filter Setting Pin
CH1 Loudness Filter Setting Pin
CH1 Main Volume Input Pin
CH2 Loudness Filter setting Pin
CH2 Main Volume Input Pin
CH2 Input Gain Output Pin
CH1 Input Gain output Pin
CH1 Input Pin A
CH1 Input Pin B
CH1 Input Pin C
CH1 Input Pin D
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
LA4743K
1-25
KD-S700GN/KD-S700BU
KD-S7250
LA6574H-X (IC561) :CD driver
1.Terminal layout & brock daiagram
VCC2 1
V05- 2
V05+ 3
V04+ 4
V04- 5
V03+ 6
V03- 7
FR FR
V02+ 8
V02- 9
V01+ 10
V01- 11
VCC1 12
VIN1 13
VIN1G 14
CH5
POWER supplise
CH5
CH4
CH3
CH2
CH1
CH1.2.3.4
POWER
11k
Thermal Shutdown
Level ShiftLevel ShiftLevel ShiftLevel ShiftOutput Control
CH2 input terminal
CH2 input terminal(for gain adjustment)
CH3 input terminal
CH3 input terminal(for gain adjustment)
Regulator terminal
Regulator terminal
Standard voltage input terminal
Signal system power
CH4 input terminal(for gain adjustment)
CH4 input terminal
CH5 output voltage set terminal
Signal system GND
CH5 output switch terminal
CH5 output switch terminal
(for gain adjustment)
HD74HC126FP-X (IC801) : Buffer
KD-S700GN/KD-S700BU
KD-S7250
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
VccVcc
1A
2A
3A
4A
1C
2C
3C
See Function Table
4C
3.Pin function
Output
1Y
2Y
Output
2Y
Output
3Y
Output
4Y
Input
C
L
H
H
Output
A
X
L
H
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
1-27
KD-S700GN/KD-S700BU
KD-S7250
PT6523LQ(IC601):LCD DRIVER
1.Pin layout
48 ~ 33
49
32
64
1 ~ 16
2.Block diagram
VDD1
VDD2
INH
OSC
DI
CLK
CE
VDD
VSS
17
COM1 COM2 COM3SG52SG5 SG4 SG3SG2SG1
DRIVER
CLOCK
GENERATOR
ADDRESS
DETECTOR
SEGMENT DRIVER & LATCHCOMMON
SHIFT REGISTER
3.Pin function
Pin No.
1 ~ 52
53 ~ 55
56
57
58
59
60
61
62
63
64
Pin NameI/ODescription
SG1 ~ SG52
COM1 ~ COM3
VDD
O
O
Segment output pins
Common driver output pins
Power supply
Display OFF control input pin.
I
When this pin is "LOW", the display is forcibly/turned OFF.
INH
(SG1 to SG52, COM1 to COM3 are set to "LOW").
When this pin is set to "High", the display is ON.
(See Note 1*)
VDD1
Used for the 2/3 bias voltage when the bias voltages
I
are provided externally. Connect to VDD2 when 1/2 bias
is used.
VDD2
Used for 1/3 bias voltage when the bias voltages are
I
provided externally. Connect to VDD1 when 1/2 bias
used.