Sony UP-D2550S Service Manual page 41

Semiconductors of which functions are equivalent are described
here. For parts replacement, refer to the section of Spare Parts in
this manual. The circuit diagram of each IC is obtained from the
IC data book published by the manufacturer.
IC
BH9595FP-Y-E2 ................................. 7-1
MB86604L ........................................... 7-2
UP-D2550S (UC,CE)
SECTION 7
SEMICONDUCTOR PIN ASSIGNMENTS
Page
IC
BH9595FP-Y-E2 (ROHM)
SCSI ACTIVE TERMINATOR
—TOP VIEW—
1 NC 25 TSD
EN 2 24 VM
SCSI LINE 15 3 23 SCSI LINE 14
SCSI LINE 16 4 22 SCSI LINE 13
SCSI LINE 17 5 21 SCSI LINE 12
SCSI LINE 18 6 20 SCSI LINE 11
GND
GND
7 GND
SCSI LINE 1 8 19 SCSI LINE10
SCSI LINE 2 9 18 SCSI LINE 9
SCSI LINE 3 10 17 SCSI LINE 8
SCSI LINE 4 11 16 SCSI LINE 7
SCSI LINE 5 12 15 SCSI LINE 6
13 V V 14
DD1 DD1
MODE
EN (PIN 2)
0 SCSI Line are High Impedance.
SCSI Line are connected with
0 : LOW LEVEL
1
2.85V through resistors.
1 : HIGH LEVEL
TSD
2
MODE
EN
CONTROL
3
SCSI LINE 15 to SW
POW
4
SCSI LINE 16
POW
5
SCSI LINE 17
POW
6
SCSI LINE 18
POW
(PUSH - PULL) (PUSH - PULL)
8
SCSI LINE 1
POW
9
SCSI LINE 2
POW
10
SCSI LINE 3
POW
11
SCSI LINE 4
POW 2.85V
SUPPLY
12
SCSI LINE 5
POW
(PUSH - PULL)
(PUSH - PULL)
13 2.85V
V
DD 1
GENERATOR
INDEX, IC
25
TSD
24
VM
POW
23
SCSI LINE 14
POW
22
SCSI LINE 13
POW
21
SCSI LINE 12
POW
20
SCSI LINE 11
POW
19
SCSI LINE10
POW
18
SCSI LINE 9
POW
17
SCSI LINE 8
POW
16
SCSI LINE 7
POW
15
SCSI LINE 6
POW
14
V
DD 1
7-1
IC