Sony HCD-GR8 Service Manual page 60

IC901 LA5617 (MAIN BOARD)
CURRENT
ON/OFF
LIMITER
VMUTE
VREF
VCC
ERROR
AMP
1 2 3 4 5
IC1502 LB1641(MAIN BOARD)
T.S.D
MOTOR
DRIVE
1 2 3 4
IC401 MSM6653A-485RS (DJ BOARD)
VPP 1
7
I4 2
ADDRESS &
3
I5/SI
COMMAND
CONTROLLER
4
I6/SD
CH 5
6
RESET
BUSY 7
I/O
INTERFACE
NAR 8
ADPCM
SYNTHESIZER
PCM
SYNTHESIZER
12
MELODY
GENERATOR
12BIT DAC
BEEP TONE
9
AOUT LPF GENERATOR
10
GND
CURRENT START
ON/OFF
LIMITER CIRCUIT
VREF
VCC
OVER HEAT
PROTECT
VREF
~ _ 1.8V
ERROR
AMP
6 7 8 9
FWD/REV/STOP
CONTROL LOGIC
5 6 7 8
20
19
544KBIT ROM
18
(EDITING ROM &
17
ADDRESS ROM
16
CONTAINS 22KBIT)
15
14
17BIT
MULTIPLEXER
8
17BIT
DATA
ADDRESS
CONTROLLER
COUNTER
13
OSC
12
TIMING
CONTROLLER
11
10
O.C.P
MOTOR
DRIVE
9 10
PGM
I3/PORT1
I2/PORT0
I1
I0
ST
CMD
XT
XT
VDD
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