Toshiba SD-4800 Service manual
FILE NO. 813-200201
SUPPLEMENT
SERVICE MANUAL
DIGITAL VIDEO
DVD VIDEO/AUDIO PLAYER
SD-4800
– SUMMARY
This service manual covers only the different points from the service manual, file no. 810-200210,
for model SD-3800 since SD-4800 is basically the same designing as SD-3800.
Please refer to the file no. 810-200210 for other information.
––
–
––
Aug., 2002
S
LASER BEAM CAUTION LABEL
When the power supply is being turned on, you may not remove this laser cautions label. If it removes, radiation of a laser
may be received.
PREPARATION OF SERVICING
Pickup Head consists of a laser diode that is very susceptible to external static electricity.
Although it operates properly after replacement, if it was subject to electrostatic discharge during replacement,
its life might be shortened. When replacing, use a conductive mat, soldering iron with ground wire, etc. to
protect the laser diode from damage by static electricity.
And also, the LSI and IC are same as above.
Soldering iron
with ground wire
or ceramic type
Conductive mat
Ground conductive
wrist strap for body.
The ground resistance
between the ground line
and the ground is less than 10W.
1M
W
CONTENTS
SECTION 3
SERVICING DIAGRAMS
1. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
2. BLOCK DIAGRAMS
2-1. Overall Block Diagram
2-2. Output Block Diagram
SAFETY PRECAUTION
NOTICE
ABBREVIATIONS
1. Integrated Circuit (IC)
2. Capacitor (Cap)
3. Resistor (Res)
3. Circuit Diagram
3-1. Output Circuit Diagram
4. PC Board
4-1. Output PC Board
SECTION 4
PARTS LIST
4. EXPLODED VIEWS
4-1. Chassis Assembly (Type A)
4-2. Chassis Assembly (Type B)
5. PARTS LIST
1. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
CNY02
Board-in
VDD+5V
VEE-9V
GND
VDD+5V
VEE-9V
GND
CN802
EU02
POWER
GND
GND
VCC+9V
12345
5P
Press-fit
12345
VCC+9V
Mechanism
PUH
TRAY
MOTOR
W501
FFC 1mm 23P
VCC
1
RF
2
LD2
3
MON2
4
VOR2
5
GND
6
VREF
7
VCC
8
F0
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
E0
A0
D0
C0
B0
F+
T-
T+
FVCC
GND
LD
MON
VOR
FFC 1.25mm 6P W502
GND
1
LDMP
2
TOPN
3
LDMN
4
TCLS
5
NC
6
FFC 1mm 8P W503
FMN
1
FMP
2
GND
3
LMT
4
DMN
5
DMP
6
VCC
7
DMFG
8
EU05 OUTPUT
1
2
3
4
5
6
7
8
9
10
11
CN501
12
13
14
15
16
17
18
19
20
21
22
23
1
2
3
CN502
4
5
6
1
2
3
4
CN503
5
6
7
8
FFC 1mm 15P
W901
15
HMUTE CSW
SW OUTPUT
HMUTES
GND
HMUTE CSW
SW OUTPUT
HMUTES
GND
15
CNY01
1011121314
SR OUTPUT
C OUTPUT
GND
SR OUTPUT
C OUTPUT
GND
1011121314
CN901
FR OUTPUT
SL OUTPUT
GND
FR OUTPUT
SL OUTPUT
GND
POWER ON
FL OUTPUT
HMUTE
POWER ON
FL OUTPUT
HMUTE
EU01 MAIN
123456789
IED958IN
GND
IED958OUT
GND
123456789
19
Cb(I/P)-INPUT
Cr(I/P)-INPUT
VGND
VGND
Cb(I/P)-OUTPUT
Cr(I/P)-OUTPUT
VGND
VGND
19
Y(I/P)-INPUT
C-INPUT
VGND
VGND
Y(I/P)-OUTPUT
C-OUTPUT
VGND
VGND
CNX01
101112131415161718
Y-INPUT
VGND
Y-OUTPUT
VGND
101112131415161718
CN302
CV-INPUT
VGND
CV-OUTPUT
VGND
GND
GND
IPXI
IPXI
IPXO
IPXO
ASP2
ASP2
ASP1
ASP1
SOUTX
SOUTX
123456789
RGBON
FFC 1mm 19P
W302
RGBON
123456789
CN801
Board-in
E+5V
GND
GND
M+8V
FF+
1
2
3
4
5
6
7
8
9
10
11
12
PWON
VDD+5V
VDD+3.3V
VDD+2.5V
MGND
VKK-34V
EU04 POWER-SW
1
2
3
4
5
6
7
8
9
10
11
12P
Press-fit
FFC 2mm 4P
W102
1
2
CN103 CN102
3
4
GND
EVER+5V
POWER LED
POWER KEY
12
1
2
3
4
PWON
E+5V
VDD+5V
VDD+3.3V
VDD+2.5V
GND
GND
M+8V
MGND
VKK-34V
FF+
CN701
EU03 FRONT
UP
RIGHT
COMMON(GND)
ENTER
DOWN
LEFT
CN104
1
GND
2
5V
3
TXD
4
CTS
5
RXD
6
RTS
FFC 1mm 13P
W603
13
F-
F-
13
VKK-34V
F+
VKK-34V
F+
101112
GND
GND
101112
CN603
DSPCKX
DSTBX
DSPCKX
DSTBX
CN101
CN601
DSPSIO_D-M
DSPSIO_M-D
DSPRST
HMUTE
DSPSIO_D-M
DSPSIO_M-D
DSPRST
HMUTE
PWRCNT
E+5V
PWRCNT
E+5V
123456789
RSTOX
RSTOX
123456789
1234567
NC
Fig. 3-1-1
2. BLOCK DIAGRAMS
2-1. Overall Block Diagram
Data/Control Bus
DVD AV Data
SP DIF Data
Tray
Motor
SPM
PUH Driver
Motor Driver
IC503
BA5813FM
IC307
S24C02BFJ
E2PROM
IC308
S24C02BFJ
E2PROM
PUH
Feed
Motor
RF Amp.
IC502
TA1323F
M11B11664A-30T
IC402
X501
22.5792
MHz
IC306
ZR36750
32M-FRAM
IC309
MBM29DV324BE
1M-DRAM
1chip-SERVO
Data Processor
Decryption,
Video Process,MPEG-2 Decoder
Dolby-Digital Decoder, OSD
MAIN CPU
64M-S-DRAM
IC305
MT48LC2M32B2
MAIN PROCESSOR UNIT AUDIO/VIDEO OUTPUT UNIT
IC401
TC94A03F
IC902
AD1958
IC903
PCM1742KE
IC904
PCM1742KE
Xtal
27MHz
PLL+DAC
Audio-DAC
Audio-DAC
ICX01
MM1568
VIDEO LPF
with
AMPLIFIRE
Buffer
ICY02
TC74HCU04A
ICY01
NJM4580E
LPF &
Amplifier
Audio Out
ICY06
NJM4580E
LPF &
Amplifier
Audio Out
ICY05
NJM4580E
LPF &
Amplifier
Audio Out
Coaxial
Digital
TOS Link Digital
Audio Out
2ch Analog
Audio Out
FL, FR Analog
Audio Out
SL, SR Analog
Audio Out
Center SW
Analog
Audio Out
Composite
Video Out
S Video Out
Y,C
B,CR
Video
Out
SW POWER SUPPLY
Display
(FL)
Display-CPU
IC101
TMP87CH75F-3D68
FRONT DISPLAY UNIT
Fig.3-2-1
2-2. Output Block Diagram
EU01
MAIN
To MAIN
12 C-IN/OUTPUT
10
Y-IN/OUTPUT
16
Cb(I/P)-IN/OUTPUT
Cr(I/P)-IN/OUTPUT
18
FL OUTPUT
5
FR OUTPUT
7
12
10
16
18
5
7
CNX01
CNY01
Lch SIGNAL
Rch SIGNAL
ICX01
MM1568AJBE
VIDEO DRIVER
2
CIN
4
VIN
6
YIN1
14
C
BIN
16
C
RIN
VIDEO
AUDIO
ICY01
NJM4580E
2 1
6 7
VOUT
COUT
YOUT
YOUT
C
BOUT
C
C
ROUT
QY02
HN-1C03F
31
33
28
20
22
19
MUTE
CR SIGNAL
CB SIGNAL
CY
SIGNAL
COMPOSITE
VIDEO SIGNAL
C SIGNAL
Y SIGNAL
JX02
JX01
JY01
C
Y
ICY04
TOTX179
R
P
PB
Y
COMPOSITE
VIDEO
S TERMINAL
Lch OUT
Rch OUT
Front
To MAIN
IEC958 OUT
1
SL OUTPUT
SR OUTPUT
SW OUTPUT
H MUTE CSW
H MUTE F
C OUTPUT
H MUTE S
33
DIGITAL AUDIO
SIGNAL
1
88
1010
1111
1313
1414
1515
ICY02
TC74HCU04AF
13 2
ICY06
NJM4580E
2 1
6 7
ICY05
NJM4580E
2 1
6 7
CONTROL
4
6
8
QY08
HN-IC03F
CONTROL
QY11
HN-IC03F
CONTROL
MUTE
MUTE
MUTE
MUTE
MUTE
QY03
QY04
QY07
QY09
QY10
QY12
DIGITAL OUT
(COAXIAL)
SURROUND L
SURROUND R
L ch
Center
SW
R ch
Fig. 3-2-2
3. CIRCUIT DIAGRAM
3-1. Output Circuit Diagram
Fig. 3-3-1
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