JVC KD-S550 User manual

SERVICE MANUAL
CD RECEIVER
No.49524
Dec. 1999
COPYRIGHT 1999 VICTOR COMPANY OF JAPAN, LTD.
This service manual is made from 100% redycled paper.
Printed in Japan
9912(V)
VICTOR COMPANY OF JAPAN, LIMITED
MOBILE ELECTRONICS DIVISION,10-1,1Chome,Ohwatari-machi,maebashi-city,Japan
KD-S550 / KD-S600
(No.49524)
KD-S550 / KD-S600
KD-S550 / KD-S600
Area Suffix
J ---- Northerm America
E ---- Continental Europe
Contents
Safety precaution  1-2
Instructions 1-3 - 13
Location of main parts 2-1
Disassembly method 2-2
Adjustment method 2-7
Flow of functional operation
until TOC read  2-8
Maintenance of laser pickup 2-10
Description of major ICs 2-11
Block diagram  2-23
Standard schematic diagrams 2-24
Printed circuit board 2-27 - 28
Parts list 3-1 - 11
COMPACT
DIGITAL AUDIO
ATT
FUNC
BAND
PROG
PRESET
DISC
DISC
Model
KD-S550
KD-S600
Remote
control unit

!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.

Main uni t
Location of main parts
Control unit
CD mechanism
Display LED & key control board
Main board
Tuner
pack
Main board
Connector to controller
Power IC
ISO connector Antenna jack
Loading motor
Mechanism relay board
Damper
Optical pick up unit
Damper
Feed motor
Spindle motor

Disassembly method
Removing the front panel unit
(See Fig.1)
1. Insert a screwdriver to the joints a on the side of the
front chassis and two joints b on the right side, then
detach the front chassis toward the front side.
1. Press the release switch and remove the front
panel unit in the direction of the arrow.
Removing the front chassis (See Fig.2)
Removing the heat sink (See Fig.3)
1. Remove the three screws A attaching the heat sink
on the left side of the body, and remove the heat
sink.
Removing the bottom cover (See Fig.4)
1.
2.
Turn the body upside down.
Insert a screwdriver to the two joints c and two
joints d on both sides of the body and the joint e on
the back of the body, then detach the bottom cover
from the body.
b
a
a
b
A
A
A
Heat sink
c
d
e
Fig.2
Fig.1
Fig. 3
Fig. 4
Regulator board
Front chassis

Removing the main amplifier board
(See Fig.5 and 6)
1.
2.
3.
4.
5.
Remove the front chassis.
Remove the bottom cover.
Remove the two screws B attaching the main
amplifier board assembly on the bottom of the body.
Remove the three screws C attaching the main
amplifier board assembly on the back of the body.
Disconnect connector CN501 on the main amplifier
board assembly from the CD mechanism assembly.
Removing the CD mechanism assembly
(See Fig.7)
1.
2.
3.
4.
Remove the front chassis.
Remove the bottom cover.
Remove the main amplifier board assembly.
Remove the three screws D attaching the CD
mechanism assembly from the top cover.
Removing the control switch board
(See Fig.8 and 9)
1.
2.
3.
Remove the front chassis.
Remove the four screws E attaching the rear cover
on the back of the front panel unit.
Remove the control switch board from the front
panel unit.
C
Fig.5
Fig. 6
B
B
C
C
CD mechanism assembly
D
DD
Fop cover
Fig. 7
EE
EE
Fig. 8
Fig. 9
Control switch board
CN501
Main amplifier board

* Prior to disassembling the CD mechanism, remove
the following parts.
* The front panel unit and the front chassis (Refer to
Fig.1 and 2)
* The heat sink (Refer to Fig.3)
* The bottom cover (Refer to Fig.4)
* The main amplifier board (Refer to Fig.5 and 6)
* The CD mechanism ass’y (Refer to Fig.7)
<CD mechanism section>
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.
1.
2.
Removing the CD mechanism control
board(See Fig.10 and 11)
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.11).
ATTENTION:
Fig.10
Fig.11
Fig.12
Fig.13
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

* 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.12 to 14)
* 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.17 and 18.
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.10, 15 to 18)
The CD mechanism ass’y can be
removed if only the rear damper
bracket on the left side is removed.
ATTENTION:
Fig.14
Fig.15
Fig.16
Fig.17
Fig.18
Rear damper bracket
Fix arm (R)
Damper
y
H
II
Loading motor
Belt
Damper bracket
CD mechanism ass’y
Flame m
m
I
I
Fix plate (L)
l
l
Rear damper bracket
Fix arm (L)
Damper
J
Fix plate(R)
J
l
l

* 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.19)
* 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.19 and 20)
When reattaching the pickuap 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.21 and 22)
Fig.19
Fig.20
Fig.21
Fig.22
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

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

Power ON
 Set Function to CD
Play
Jump to the first track
TOC readout
T racking 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
 F ocus Servo Loop ON
• When the laser diode correctly
emits
Microprocessor
commands
Rough Servo Mode
CLV Servo Mode
(ProgramArea)
CLV Servo Mode
(Lead-In Area;
Digital: 0)
• RF signal
Flow of functional operation until TOC 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

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.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
SDA
GND
OUTLR
OUTLF
TL
B2L
B1L
IVL
ILL
QSL
IDL
MUTE
ICL
IMD
IBL
IAL
SCL
VCC
OUTRR
OUTRF
TR
B2R
B1R
IVR
ILR
QSR
IDR
Vref
ICR
CAP
IBR
IAR
CD-CH
TAPE
TUNER
POWER
SUPPLY
SOURCE
SELECTOR
VOLUME 1
+20 to -31 dB
LOUDNESS
LEFT
BASS
LEFT
+15 dB
TREBLE
LEFT
+12 dB
BASS
RIGHT
+15 dB
TREBLE
RIGHT
+12 dB
MUTE
FUNCTION
ZERO CROSS
DETECTOR
VOLUME 2
0 to 55 dB
BALANCE
FENDER REAR
VOLUME 2
0 to 55 dB
BALANCE
FENDER FRONT
HC BUS
REC
VOLUME 2
0 to -55dB
BALANCE
FENDER FRONT
VOLUME 2
0 to -55dB
BALANCE
FENDER REAR
VOLUME 1
+20 to -31 dB
LOUDNESS
RIGHT
LOGIC
21
31
2
19
16
15
13
11
22
20
18
17
14
23 25 24 26 27 28
30
29
1
32
3
4
10 8 9 7 6 512
1.Terminal Layout
3.Pin Functions
2.Block Diagram
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
No. Pin No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
SDA
GND
OUTLR
OUTLF
TL
B2L
B1L
IVL
ILL
QSL
IDL
MUTE
ICL
IMO
IBL
IAL
Serial data input/output.
Ground.
output left rear.
output left front.
Treble control capacitor left channel or
input from an external equalizer.
Bass control capacitor leftchannel or
output to an external equalizer.
Bass control capacitor left channel.
Input volume 1. left control part.
Input loudness. left control part.
Output source selector. left channel.
Not used
Not used
Input C left source.
Not used
Input B left source.
Input A left source.
I/O
-
O
O
I
-
-
I
I
O
-
-
I
-
I
I
Symbol I/O Symbol I/O
Input A right source.
Input B right source.
Electronic filtering for supply.
Input C right source.
Reference voltage (0.5Vcc)
Not used
Output source selector right channel.
Input loudness right channel.
Input volume 1. right control part.
Bass control capacitor right channel
Bass control capacitor right channel or
output to an external equalizer.
Treble control capacitor right channel or
input from an external equalizer.
Output right front.
Output right rear.
Supply voltage.
Serial clock input.
I
I
-
I
-
-
O
I
I
-
O
I
O
O
-
I
IAR
IBR
CAP
ICR
Vref
IDR
QSR
ILR
IVR
B1R
B2R
TR
OUTRF
OUTRR
Vcc
SCL
Functions Functions
TEA6320T-X(IC301) : E.VOLUME
Description of major ICs

AN8806SB-W (IC501) : RF&Servo AMP
PD
LD
LDON
LDP
VCC
RF-
RF OUT
RF IN
C.AGC
ARF
C.ENV
C.EA
CS BDO
BDO
CS BRT
OFTR
/NRFDET
GND
PDAC
PDBD
PDF
PDE
PDER
PDFR
TBAL
FBAL
EF-
EF OUT
TE-
TE OUT
CROSS
TE BPF
VDET
LD OFF
VREF
ENV
30 24 25 26 23 22 1 4 3
33
32
34
31
36
35
13
14
15
16
20
2
21
629
7 28 27 89 10 17 11 12 19
ENV CURCUIT
RF
DET
AGC
EQ
BDO
OFTR
--
+
--
+
-- +
-- +
-- +
--
+
--
+--
+
--
+--
+
--
+
--
+
--
+
--
+
--
+
--
+
--
+
-- +
VCBA
VCBA
VCBA
VCBA
--
+
1.Pin layout
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
2.Block diagram

35
36
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
3. Pin function
PD AC
FBAL
TBAL
PDFR
PDER
PDF
PDE
PD BD
TE BPF
VDET
CROSS
TE OUT
TE-
FE OUT
FE-
/NRFDET
GND
LD OFF
VREF
ENV
OFTR
C.AGC
ARF
C.ENV
C.EA
CS BDO
BDO
CS BRT
LD
LD ON
LDP
VCC
RF-
RF OUT
RF IN
PD
Pin No. Symbol I/O
I
O
I
--
--
I
O
I
I/O
O
I/O
I/O
I/O
O
I/O
O
O
--
O
O
--
O
I
O
O
I
O
I
I
I
I/O
I/O
I
I
I
I I-V amp input
I-V amp input
I-V amp input
I-V amp input
E I-V amp gain control
F I-V amp gain control
Tracking balance control
Focus balance control
Inverse input pin for focus error amp
Output pin of focus error
Inverse input pin for tracking error amp
Tracking error signal output
Tracking error cross output
Input pin of tracking error through BPF
Vibration detection signal output
Connect to ground
Reference voltage output
Description
APC amp input terminal
APC amp output terminal
APC ON/OFF control terminal
Envelope output
Ground
RF detection signal output
Of-track status signal output
BDO output pin
A capacitor is connected to this terminal to detect the envelope of RF signal
RF output
Connecting pin of AGC loop filter
RF input
RFamp output
Inverse input pin for RF amp
Power supply
Connect to ground
A capacitor is connected to this terminal to detect the envelope of RF signal
A capacitor is connected to detect the lower envelope of RF signal
A capacitor is connected to detect the lower envelope of RF signal

1 2 3 4 5 6 7 8 9 10 11 12
BA4905-V3 (IC901) :
1.Terminal layout
2.Block daigram
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 than VCC. and max
output current is 300mA.
A voltage supply for ACC block. This output voltage is approximately
0.7V lower than VDD'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

HA13158A (IC321) : Power amp
1. Pin layout
2. Block diagram
IN1
IN2
IN3
IN4
STBY
2
1
11
13
23
10
TAB
PROTECTOR (ASO
SURGE, TSD)
INPUTBUFFER1
INPUTBUFFER2
INPUTBUFFER3
INPUTBUFFER4
AMP1
AMP2
AMP3
AMP4
MUTE
PVCC1PVCC2
INVCC
+
-
+
-
+
-
+
-
12 22
14 18 6
3

4

5

7

8

9

15

16

17

19

20

21
1 ~ 23

JES01-9596 (IC601) : Main micon
1. Pin layout
2. Pin function
1
24
64
41
80 ~ 65
25 ~ 40
~ ~
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
XIN
TEST2
J BUS SI
J BUS SO
J BUS SCK
J BUS I/O CONT
SUBQ
SQCK
RESET
LCD SI
LCD SO
LCDSCK
LCD CE
FM ILLUMI
AM ILLUMI
CD ILLUMI
DIMMER OUT
LM0
LM1
KS2
KS1
KS0
DETACH
K2
K1
K0
Vdd
SW2
CD LSI RESET
MCLK
MDATA
MLD
SCL
SDA
4.5MHz crysral oscillation
Connect to ground
J-BUS signal data input ( to 74HC126 )
J-BUS signal data output ( to 74HC126 )
J-BUS output clock signal ( to 74HC126 )
J-BUS I/O control
CD LSI subcode data input
No use
CD LSI subcode clock
Micon reset pin
No use
LCD driver data output
LCD driver clock signal
LCD driver chip enable port
No use
No use
No use
No use
CD loading motor output
CD loading motor output
No use
No use
No use
No use
No use
Output for initial setting diode matrix
Front panel detect
No use
Input for initial setting diode matrix
Input for initial setting diode matrix
5V power supply
CD mechanism switch 2 for 12cm disc
CD LSI reset
CD LSI command clock signal
CD LSI command data output
CD LSI command load signal
No use
No use
E.volume clock output
E.volume data output
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
76
75
76
77
78
79
80
CD ON
RELAY
BBE CTL
BEEP
SW4
SW1
SW3
REST
JOG0
JOG1
CD SENSE
STATUS
P.SAVE2
SD/ST
REMOCON
J BUS INT
BAND
MONO
IFRQ/AGC
MUTE
LEVEL
S METER
KEY CHANGE
KEY2
KEY1
KEY0
P.SAVE1
SENSE
FM IF COUNT
Vdd
AM OSC
FM OSC
Vss
EO
TEST1
XOUT
CD 8V supply on
5V power control
No use
No use
CD mechanism switch 1 for disc in, 8cm disc
CD mecha. switch 3 for disc present, loading end
CD pickup rest position
Rotary encoder input 0
Rotary encoder input 1
CD LSI sense signal
CD LSI status signal
Power save 2 : +B detect
Station detection, Stereo indication
Remocon input
J-BUS interrrupt
FM/AM band selection
FM mono selection
During FM auto search, IF request output H after SD
detected. During AM suto search, AGC output.
Muting switch
Level meter input
S meter input
Connect to ground
Key 2 data input (AD)
Key 1 data input (AD)
Key 0 data input (AD)
Power save 1, ACC power detect
Voltage sense
No use
FM IF counter data input
No use
No use
5V power supply
No use
FM input frequency
Ground
No use
PLL error output signal
Connect to ground
4.5MHz crystal oscillation
Pin
No.
Pin
No.
Symbol SymbolFunction Function

LA6557-X(IC541) : Servo BTL driver
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
- +
- +
- +
- +
- +
- +
- +
FR
FR
Signal system
power
CH1,2
POWER POWER
Output
control
MUTE is as follows
High : output ON
Low : output OFF
Input
11k
11k
11k
11k
22k
22k 22k
22k
Mute
Level
shift Level shift Level
shift Level shift
CH3,4,5
CH5 CH4 CH3 CH2 CH1
VCC2 V05- V05+ V04+ V04- V03+ V03- FR V02+ V02- V01+ V01- VCC1 VIN1 VIN1G
REW FWD S-GND MUTE VIN4 VING4 VCC-S FR VREF-IN REG-OUT REG-IN VIN3G VIN3 VIN2G VIN2
Thermal shutdown
1. Block diagram
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
VIN1G
VIN2
VIN2G
VIN3
VIN3G
REG-IN
REG-OUT
VRFE-IN
VCC-S
VIN4G
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 (VCC1 and VCC2 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 (REW), Logic input for loading block
Pin
No. Pin Name Description

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32
DI CL CE OSC Vss VDD2 VDD1 INH VDD COM3 COM2 COM1 S52 S51 S50 S49
LC75823W (IC601) : LCD Driver
1. Pin Layout & Symbol
2. Pin Function
Pin No.
1 to 52
53 to 55
56
57
58
59
60
61
62
63
64
I/O
O
O
--
I
I
I
--
I/O
I
Segment output pins used to display data transferred
by serial data input.
Common driver output pins. The frame frequency is given
by : t0=(fosc/384)Hz.
Power supply connection. Provide a voltage of between
4.5 and 6.0V.
Display turning off input pin.
INT="L" (Vss) ----- off (S1 to S52, COM1 to COM3="L"
INT="H" (VDD)----- on
Serial data can be transferred in display off mode.
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. Connect to GND.
Oscillator connection.
An oscillator circuit is formed by connecting an external
resistor and capacitor at this pin.
Serial data CE : Chip enable
interface connection
to the controller. CL : Sync clock
DI : Transfer data
Symbol
S1 to S52
COM1 to COM3
VDD
INH
VDDD1
VDD2
Vss
OSC
CE
CL
DI
Function