– 4 –
2-2. SENSOR CIRCUIT BOARD (MC2)
2-2-1. EXPLANATION OF OPERATION
Sensor circuit board (MC2) is the relay circuit board for the
disc write protection detection, disc setting detection switch,
the pickup location detection sensor and spindle motor con-
trol signal.
2. OUTLINE EXPLANATION OF DRIVE CIRCUIT
BOARD
2-1. MAGNETIC HEAD DRIVER CIRCUIT BOARD (MC1)
During recording, it is the driver circuit board to magnetize
toward the magnetic head.
2-1-1. EXPLANATION OF OPERATION
During recording, the data (WD_P and WD_N) from the MC3
circuit board is used to operate the large current buffer at IC801
in order to turn the FET array on and off. This is turn deter-
mines the direction of the magnetic field applied to the mag-
netic head. Also an upper limit is decided so that a magnetic
field level may not be bigger at the amplitude limitation circuit
by the data.
2. OUTLINE OF iD FORMAT DISC DRIVE
CIRCUIT
1. OUTLINE OF DRIVE CIRCUIT BOARD
A drive part is composed of the block diagram of the Fig. 1,
and a drive circuit board is composed of MC1, MC2 and MC3.
Fig. 1
Fig. 2
Large current
buffer
Magnetic
head
UP/DOWN
sensor
FET array
Amplitude
limitation circuit
To the
magnetic
head
WD_P
WD_N
EJULK
EJLK
+ MH+
- MH-
MC1
Amplitude
limitation circuit
To the
magnetic
head
Fig. 3
MC2
WRPROT
CARTRG
PUINI
SPDLW
SPDLU
SPDLV
SPDLCOM
Disc write protect detection switch
Disc setting detection switch
Pick up location detection sensor
S8003
S8004
D8003
To the
spindle
motor
The ascent and descent condition of the magnetic head is
being watched with the magnetic head up and down sensor.
WDTX(reverse of WDT)
WDT
(A/D) THERMO
MO signal (play signal)
(A/D) FCLKAMPL
FCLKNP
FCLKPP
FCLKZ
(A/D) ADRSAMPL
ADRSPLS
(A/D) FES
(A/D) TES
(A/D) SUM
(PWM output) FCSR
(PWM output) FCSF
(PWM output) TRKR
(PWM output) TRKF
(PWM output) SLDR
(PWM output) SLDF
SPREF
WCLK
WG
16bit
SDRAM
(64Mbit)
CPU
CAMERA
ASIC
ATA BUS
(IDE)
Processor
BUS
(TA6015F)
(BD6603KVT)
Iout
LD-ON/Off
RF-On/Off
(oscillation circuit
On/Off)
PS-On/Off(Power
saveOn/Off)
ST(abnormal
detection)
T+
T-
SLED+
SLED-
F+
F-
U/V/W/COM
A
B
C
D
E
F
G
H
I
J
A
B
C
D
Photo
sensor
output
THERMO
168
167
186
136
190
161
160
162
163
189
193
192
191
209
208
212
211
207
206
205
165
171
"0" Rec
"1" Play
50
ø
AS-MO DRIVE CIRCUIT BOARD (MC3)
Magnetic
head
MAGNETIC HEAD
DRIVER CIRCUIT
BOARD (MC1)
DRIVE MECHA and
MECHA CIRCUIT
BOARD
iD disc(50ø)
Temparature
sensor
Pick Up
Spindle
motor
Tracking
actuator
Focus
actuator
SENSOR
BOARD
(MC2)
Laser
APC IC
(included
PICK UP)
CAMERA
DRIVE
ASIC
Sread
motor
VCC
LD
PD
RF Amplifier
FCM/ADDR
Amplifier
Servo
Amplifier
Servo
Driver
Lazer POWER
Control
CA2
SDCLK
96
Содержание IDC-1000ZE iDshot
Страница 45: ...OVERALL WIRING 基板間結線図 ...
Страница 46: ...Apr 01 3 780 NS Printed in Japan SANYO Electric Co Ltd Osaka Japan ...