Unit 1303A00748
Unit 1303A00748
Unit 1303A00748
Busted 'A' Remnants
Busted 'A' Remnants
Busted 'A' Remnants
Assembly Name
A #
R E U S E
Foil # R E V
Comp Date
Stamp Date R E U S E
Foil # R E V
Comp Date Stamp Date
Backplane
1
*
•
09830-66501 REV B
-
APR 09 1973
-
External I/O Bus
2
*
•
09830-66502 REV C
7305
APR 13 1973
09830-66502 REV C
7523
-
ROM Cartridge Bus
3
*
•
09830-66503 REV B
7312
APR 16 1973
09830-66503 REV C
7528
-
CPU I/O
11
np
-
-
*
• 09810-66511 REV B
7540
-
CPU Clock & I/O
12
np
-
-
*
• 09810-66512 REV C
7528
-
CPU Microcode Engine
13
np
-
-
*
• 09810-66513 REV A
7536
-
CPU Registers & ALU
14
np
-
-
*
• 09810-66514 REV A
7539
-
BASIC ROM
21
np
-
-
*
•
9830-66521 REV A
7406
-
M Register
82
np
-
-
*
• 09830-66582 REV B
7419
-
T Register
83
np
-
-
*
• 09830-66583 REV A
7313
JUN 05 1973
4KW RAM
84
np
-
-
•
5020-8304 REV A
7419
-
"
84
np
-
-
*
•
5020-8304 REV A
7325
MAY 24 1973
ROM Buffer
25
*
•
09830-66525 REV A
7312
MAR 30 1973
09830-66525 REV B
7536
-
ROM Card
26
np
-
-
*
•
5020-6884 REV A
7532
-
Keyboard Matrix
31
*
09830-66531 REV B
-
-
• 09830-66531 REV B
-
-
Keyboard Encoder
32
*
•
09830-66532 REV D
7649
-
09830-66532 REV D
7537
-
Keyboard Interconnect
34
*
•
09830-26534 REV B
-
-
09830-26534 REV B
-
-
Display
41
*
•
09830-66541 REV D
7452
-
09830-69541 REV E
7511
-
Display Logic
42
*
•
09830-66542 REV A
7308
MAR 30 1973
np
-
-
Power Supply
51
09830-66551 REV A
7308
-
*
• 09830-66551 REV A
7526
-
Tape Interface
61
* M •
09830-66561 -
7307
APR 17 1973
09830-66561
7531
-
Tape Control
62
* M •
09865-66562 REV B
7309
MAR 24 1973
np
-
-
Tape R/W
63
* M •
09865-66563 REV C
7313
APR 11 1973
09865-66563 REV D
7408
DEC 12 1973
Tape Motor Control
64
* M •
09865-66564 REV B
7311
APR 24 1973
np
-
-
Tape Interconnect
65
*
•
09830-66565 REV B
7405
JAN 17 1974
np
-
-
Tape Head Amp
66
*
•
09865-66566 REV B
7349
-
np
-
-
NOTES
• Printed circuit boards are identified by the Assembly Number printed in the foil
of the circuit board. The last two digits of the assembly number distinguish
each board type, and correspond to the color coding of the board extraction
handles.
• This schematic presents the 4KW RAM board-set so the assemblies are
identified as 82,83,84. The connectors they plug into remain identified as
N22,N23,N24, from the original design for 2KW RAM boards.
• IC locations are identified by a label of the form:
U <assembly-type> – <enumeration>
or
U <assembly-type> – <row-alpha> <column-number>
A few boards have the IC locations in the foil, these are used for the
enumeration if present. For the CPU and tape drive boards the same
enumeration as presented in the HP patent and service manual is used.
For other boards, a row-column locator is used, with the row specified by
a,b,c,.. and the column by 1,2,3,.. starting at the upper left corner.
• The symbol
represents a connector pin. The solid black end is the male
side, the white-filled end is the female side.
Connector pins are identified by a label of the form:
N <assembly-type> . <pin>
• A small black rectangular marker on the upper half of a gate symbol indicates
an open-collector output.
• Capacitance in microfarads unless otherwise noted.
• This schematic is based on a reverse engineering of the 9830 board
assemblies listed in the accompanying table, along with some use of the
9830 patent (US #4,012,725) and the tape drive schematics available in the
the 9830 service manual.
• 2013 Spring - 2014 Spring:
Drawn by bhilpert.
2014 Oct 02: typo correction nMW75-->nMW15, pg M8.
2014 Oct 12: corrections to 9866 connector pin labels, pg F2.
2014 Dec 26: correction, U42-c2.2 to V+5 rather than GND, pg D1.
HP 9830 Computer
Section: Notes
Page: N2
Rendition: 2014 Dec 26