Service manual

DEH-3750MP/XU/GS
16
1234
1234
C
D
F
A
B
E
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
BRST,BRXEN,BSRQ
C
CN901
Q101
M
LASER
DIODE
MONITOR
DIODE
S903
DSCSNS
FOCUS ACT.
M1
SPINDLE
MOTOR
M
M2
LOADING/CARRIAGE
MOTOR
TRACKING ACT.
LD-
MD
FOP
TOP
15
5
1
4
PICKUP UNIT
(P10)(SERVICE)
HOLOGRAM
UNIT
IC 301
BA5835FP
IC 201
UPD63763GJ
IC 703
3V REGULATOR
RF AMP, CD DECODER,
MP3 AND WMA DECODER,
DIGITAL SERVO/DATA PROCESSOR
CD
DRIVER
3
VD
VD
3VDD
10
LOUT
5
CN101
TOP
FOP
16
SOP
15
SOM
18
LCOP
17
LCOM
22
2
LOEJ
31
LOUT
9
CONT
12
FOP
FD,TD
AC,BD
E,F
SD,MD
3
13
TOP
S901
HOME
S904
12EJ
S905
8EJ
LD+
14
142
LD
143
PD
CD CORE UNIT(S10.1)
1312
X701
DSCSNS
CONT
LOEJ
HOME
32
97
53
47
VDD
IC 203
NJM2885DL1-33
3.3V REGULATOR
V3R3D
1
3
VDCONT
49
S-812C33AUA-C2N
MICRO
COMPUTER
IC 701
PE5454A
4
V3R3D
19
BDATA,BSCK
VD2
VDD
2
15
5
1
4
14
VD2
VDCONT
30
31
8EJ
12EJ
X1
X2
reset
14
15
RESET
CD3VON
46
1
CD3VON
2
E
TUN L
3
CDL
SYSTEM
I
C
P
CN401
1
2
CN721
TUNER AMP UNIT
CD L
A
TUN 3.3V
SYS 8V
VDD
ANTENNA
Q991
RESET RST
14
21
5
20
VDCONT
VD1
43
5
Q992
B.UP
A
VDD
19
9
XSI,XSCK,CLAMSW,VDCONT,XAO
Q993
Q994
VD2
CD3VCONT
22
23
FMRF
ANT adj
RF adj
FM ANT
T51
CF52
CF51
RFGND OSCGND DGND AUDIOGND NC VCC VDD_3.3
3.3V
2.5V
IC 4
3.3V 2.5V
←
IC 2
2.5V
WC
CE2
ROM_VDD
SL
DI
CK
CE1
NC
DO
NC NC NC NC
76 13 5 1098 11 14 18192021
1
3
212 1522 16 4
17
IC 1
3.3V
AM ANT
FMRF
ATT
LPF
OSC
IC 3 EEPROM
5.0V
IC 5
5V 3.3V
←
ATT
MIXER, IF AMP
DET, FM MPX
24
23
Rch
Lch
FM/AM TUNER UNIT