Dvd P.w.board Operation - Sanyo RB-7201 Service Manual

DVD P.W.BOARD OPERATION

1. General operation diagram (This is a basic general operation diagram)
The circuit mounted on the Loader part (Frontend Board) is configured as shown , which is divided into following blocks according to main ICs.
PICK-UP;SF-HD6
DVD/CD PD
A
B
C
D
E
F
VR-CD
VR-DVD
MD
LD-CD
VD
HFM
High-
LD D
frequency
circuit
LASER
DIODE
GND-LD
F-
FOCUS
F+
ACTUATOR
T-
TRACKING
T+
M
SLED
MOTOR
LIMIT
SWITCH
OPEN/CLOSE
SWITCH
M
LOADING
MOTOR
SPINDLE
MOTOR
HALL
VREF
RF AMP
MD
LD
TOST,FOST,BST,VCA
TBAL,FBAL,SGC
IC100
LA9702
DEF
MD
LD
5Vd
CAO
CAN
FE
LDON1,LDON2
CD x2
RFSCT,EQSCT
CD x4 PP/TE,DPD/TE
4-CH BTL DRIVER
9V
IC601
BA5937
FDD
TDD
SLD
OPEN/
CLOSE
DMUTE2
3-PHASE MOTOR DRIVER
9V
U+,U-
V+,V-
W+,W- SPD
IC602
FG
BA6849
FR
U,V,W
DMUTE
JVAD
JV
RFOP,RFON,PH,TE,ADBH
BH
ADBH
IC200
LC78661W
DEFECTI
DEF_INH
DEFECTO
XHTR
FE
IC101
BU4066
ANALOG SWITCH
IC500
M37903S4CHP
MICRO COMPUTER
- 5 -
DSP
9V
(actuator)
IC201
(motor)
T224162B
5V
(analog)
DRAM
16.934MHZ
IC900
5Vd
3.3V
BA033
(digital)
(FOR DSP)
REGULATOR
DACK
DREQ
DCLK,DBGN,DERR
SDT[O;7]
EMPH,C2F,LRCK,BCK,CD_DATA,SPDIF
16MHZ
IC504
TC7SHU04FU
INVERTER
IC550
TO BACK-END
LE28C1001
FLASH MEMORY
RXD,SCLK
HD_INT,TXD,RDY_HIF
IC502
RESET HRST
M51953
RESET
16MHZ
PH 6P
FFC 26P
FFC 16P
BLOCK