Sony VAIO PCG-F540 Service Manual page 143

[Reference] On Serial/Parallel Loopback Tool
• The serial loopback tool and the parallel loopback tool are necessary for diagnostics of the serial communication line and
the parallel communication line. Create the serial loopback tool and the parallel loopback tool locally, referring to the
connection diagrams shown below.
Serial Loopback Tool : For diagnostics of serial port
SERIAL LOOPBACK CONNECTOR CONNECTION DIAGRAM
• Connector Types DB9S (Female)
• Interface Standard RS-232C
• Loopback Data & Handshake
Parallel Loopback Tool : For diagnostics of parallel port
PARALLEL LOOPBACK CONNECTOR CONNECTION DIAGRAM
• Connector Types DB25P(Male)
• Interface Standard Centronics
• Loopback Status to Commands
Confidential
PCG-F540/F560/F570/F580 (UC)
DB9S
1
DCD
2
RX
3
TX
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
DB25P
-STROBE
1
14
2
D0
15
3
D1
16
4
D2
17
5
D3
18
6
D4
19
7
D5
20
D6 8
21
D7
9
22
-ACK
10
23
BUSY
11
24
PE
12
25
SLCT
13
NOTE:
The black round mark "
NOTE:
The black round mark "
-AUTO FD
-ERROR
-INT
-SLCT IN
GND
GND
GND
GND
GND
GND
GND
GND
2-2
" indicates soldering.
z
" indicates soldering.
z