HP Portable PLUS - Page 123

Portable PLUS Computer
Replaceable Parts 9-15
Table 9-7. Optional Modem peA Replaceable Parts (U.S. Version)
(A3) Reference
HP
Description
Quantity
Designation
Part Number
Jl
1251-7532 Phone Jack, RJ11C
1
J2
1252-0696
Connector, 2 x 6 female
RA
1
Ql , Q2, Q7,
1855-0556 Transistor, N-ch
FET 60V
4
Q11
T1
9100-4454
Transformer, audio
1
U1
1820-1145
Integrated Circuit,
MCl4049UBCP 1
U2
1826-1348
Integrated Circuit, demodulator
40038C
1
U3
1826-1347
Integrated Circuit, modulator 37
1
U4, U5, U7,
1826-1075
Integrated Circuit, dual op-amp
LF44 4
U10
U6,
U9 1826-0501
Integrated Circuit, triple analog 2
U8
1826-0139
Integrated Circuit, LM1458
1
U11
1813-0460 Integrated Circuit, oscillator
1
U12
1826-1060 Integrated Circuit, AMI S3522P
1
U13
1820-3207
Integrated Circuit, 74HC39o
1
U14 1820-3968 Integrated Circuit, MPU 80C5O
1
U15
1826-0412 Integrated Circuit, LM393N
1
U16
1826-0603
Integrated Circuit, UA74S40 reg.
1
U17 1990-1066
Integrated Circuit, opto-isolator LCA 1
U18
1990-1074
Integrated Circuit, opto-isolator 4N3
1
Table 9-8. System ROMs
Reference
HP Part Number
Function/Revision
Designation
AlU16
1818-3668
Diagnostics, boot code;
PAM: help, menu, com-
A1U27
1818-3671 mands, directory.
AlU17
1818-3669
HPLINK,
AMIGO sys., COMMAND Com, EDLIN,
AlU28
1818-3672
MORE, PRINT, PACK, FORMAT.
AlU18
1818-3670
I/O operating system; system file SECURE.
AlU29
1818-3673