MiTAC 7521 N - Sio Port Test Error

114
7521
7521
N/B MAINTENANCE
N/B MAINTENANCE
7.11 SIO PORT TEST ERROR
An error occurs when a mouse or other I/O device is installed.
COM1CTS#
J507
U1
ADM3311
D/DSR#
D/CTS#
D/RI#
D/DCD#
D/RXD
D/RTS#
D/TXD
D/DTR#
COM1RTS#
COM1TXD
COM1DTR#
U27
SUPER I/O
PC97338VJG
RS232_OFF#
ISA_IRQ4
U22
SIS630
COM1RXD
COM1DCD#
COM1DSR#
COM1RI#
CA2
CA1
PIN 1: DCD…… DATA CARRIER DETECT PIN 6: DSR….. DATA SET READY
PIN 2: RD…….. RECEIVED DATA PIN 7: RTS….. REQUEST TO SEND
PIN 3: TD…….. TRANSMIT PIN 8: CTS….. CLEAR TO SEND
PIN 4: DTR…… DATA TERMINAL READY PIN9: RI…….. RING INDICATOR
PIN 5: SG…….. SIGNAL GROUND
PIN DEFINITION OF SIO PORT:
PIN 1,4,6 SHORT
PIN 2,3 SHORT
PIN 7,8,9 SHORT
LOOPBACK CONNECTOR
FOR SIO TEST
Q1
R3
100K
+3V
U31
W83626F
100P*4/NA