4-7
HDW-250
OVERALL (2/2)
Block Diagram
B-¥HDW250-BLOCK
OVERALL (2/2)
Block Diagram
M
M
M
M
M
M
M
M
PARALLEL
I/O
FAN
MOTOR DRIVER
SERIAL
I/O
SIO DATA BUS
PROC
CONT IF
5V / 3V
PROC CONT DATA
REF FRAME
REF CF
LCD
CONT
16k bit
SRAM
PIO
ERASE ON / OFF
FULL
ERASE OSC
ERASE ON / OFF
CUE / TC
ERASE OSC
SERVO
IC
S-REEL
FG DET
S-REEL
MOTOR DRIVER
T-REEL
FG DET
T-REEL
MOTOR DRIVER
SHAPER
SHAPER
CAPSTAN
MOTOR DRIVER
DRUM
MOTOR DRIVER
THREADING
MOTOR DRIVER
CASSETTE
COMPARTMENT
MOTOR DRIVER
EQ-76
VPR-53
AUDIO
METER
LED DRIVE/
KEY SCAN
KEY DATA
SHIFT
REGISTER
LCD
CONTROLLER
LCD
KEY MATRIX
KEY MATRIX
H1004
FULL ERASE HEAD
H1003
TC ERASE HEAD
H1003
CUE ERASE HEAD
PM1003
PINCH SOLENOID
PM1002
S-BRAKE SOLENOID
PM1001
T-BRAKE SOLENOID
PM1004
HEAD SOLENOID
M1001
DRUM MOTOR
M1004
THREADING MOTOR
DRUM FG
DRUM PG
M1002
CAPSTAN MOTOR
CAPSTAN FG (A)
CAPSTAN FG (B)
M1003
T-REEL MOTOR
M1005
S-REEL MOTOR
SOLENOID
DRIVER
FAN MOTOR
SST-13
DC-DC
CONV
SW
SW
SW
VOLTAGE
DETECTOR
DC OUT
UN REG
SW
FU-76
PSW-67 to 70
J1003
BP-90
BP-L60
BATTERY
EXT
DC IN
BREAKER
EXT
AUTO
DC-85
TIMING
CONTROL