Yamaha i88x Service Manual page 89

<P.3>
i88X OVERALL CIRCUIT DIAGRAM 3/12 (DM 3/5)
DM
003
Not installed
i88X OVERALL CIRCUIT DIAGRAM 4/12 (DM 4/5)
DM 004
1SS355(VT332900)
DIODE
DM:D600-602
1
2
1 : ANODE
2 : CATHODE
i88X
D-FF
VOLTAGE CONVERSION
(5V to 3.3V)
INVERTER
In the usual case: Pull-Up via 10k ohms
In case of CN501 connection: Low
TRANSCEIVER
Not installed
TRANSCEIVER
INVERTER
INVERTER
PHOTO
COUPLER
OR
Voltage Conversion (3.3V to 5V)
INVERTER
MULTIPLEXER
Loop Filter
Voltage Conversion
(3.3V to 5V)
LINE RECEIVER
OR
(1FS is counted by the timer.)
CPU
The following ports are used for INPUT only ;
Ports 2, 5 and 7
P81 through P84, and P67
Not installed
TRANSCEIVER
Not installed
TRANSCEIVER
Voltage Conversion (5V to 3.3V)
INVERTER AND
SRC
OR
Voltage Conversion (5V to 3.3V)
DIT
OR
Not installed
RESET
Not installed
In the usual case: Pull-Up via 10k ohms
In case of CN501 connection: Low
INVERTER
D-FF
DATA
SELECTOR
OR
INVERTER
MUTE DELAY CIRCUIT
RESET
D-FF
DIR2
INVERTER
D-FF
INVERTER
Voltage Conversion (3.3V to 5V)
PA_CLK for OUTPUT
ATSC2A
PB_CLK for INPUT
PB_CLK for OUTPUT
Note: See parts list for details of circuit board component parts.
i88X
Not installed
MONITOR
SELECT
Fs(HOLD)
Cable Holder
More than two LEDs do
not light at the same time.
1/2 3/4 5/6 7/8 DIGITAL
44k 48k 88k 96k
( ) : Ceramic Capacitor
28CC1-8831036 2 3/5
Voltage Conversion (3.3V to 5V)
OR
OR
( F) : Metal Film Resistor
( ) : Ceramic Capacitor
( ) : Flame Proof Resistor
28CC1-8831036 2 4/5
i88X