Commodore PC 10-1 User manual

SERVICE MANUAL
PC
10-1/10-2/10-Ill
APRIL, 1989 PN-314860-01
\ | I
& Commodore

SERVICE
MANUAL
PC
10-1/10-2/10-Ill
APRIL,
1989
PN-314860-01
Commodore Business Machines, Inc.
1200 Wilson Drive, West Chester, Pennsylvania 19380 U.S.A.
Commodore makes no expressed or implied war-
ranties with regard to the information contained
herein. The information is made available solely on
an as is basis, and the entire risk as to quality and
accuracy is with the user. Commodore shall not be
liable for any consequential or incidental damages
in connection with the use of the information con-
tained herein. The listing of any available replace-
ment part herein does not constitute in any case
a recommendation, warranty or guaranty as to
quality or suitability of such replacement part.
Reproduction or use without expressed permission,
of editorial or pictorial content, in any matter is
prohibited.
This manual contains copyrighted and proprietary information. No part
of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise, without the prior written permis-
sion of Commodore Electronics Limited.
Copyright © 1989 by Commodore Electronics Limited.
All rights reserved.

PC10-1/10-2/10-ll SERVICE MANUAL
CONTENTS
TITLE PAGE
SPECIFICATIONS
PCIHO-1
scseseccaananeenennnnennennnenennsnsnennnnnnnsnsunnenssenssnunnnnsnunsnsnnansnsnnnnnsnsannnanerennnen
1
-SPECIFICATIONS
PCIO-2
.uueseesseeseennserssersersesnenensesnenstnnsnssnsnnensnnnnennnnnnnnnonsenonsnnnonsnennnsorsnnsnnee
2
BLOCK
DIAGRAM
anücnnannnnnnnennnnnnnnnnnnnnnnnenssnnsnnnnnnnenenssnnnsssssnsesnsnnsnsnussnssnnnnunsnsanennnnnssssnsnnnennennenenee
3
BOARD
LAYOUT
...cccessennnannnnnnonennnnnennnnnnsnnnnnnunnnsnsssssnnnnsssnssnnnnnnsssnsnnnsssssssnsesssssssonnnssssnsnusenennennen
3
MAJOR
PARTS
LIST
.ceeneeeceeennnnnenennenennnnnnnenneennnnensnnnnensnsnnnnnensnsnssnsnsssssessnnsssnnnenssnnnesssssnsansnsnnrene
4
PCB ASSEMBLY #380064
PARTS LIST ..anseennannasnannensnnnnnnnnnnsnenennnnnunsnnnnnnssnnssnsnnnssnsnnnsnnsnssnnnsnnnnnnnnnannnnnsnnssensnnsnnnn 5
BOARD LAYOUT .cceeaseeesssnennnnsnensnsssnnnnnnnnsnnnnnnnsnnnonsnsnssnsnsenenssnnenssensnnsensnnenssnansssnsssnnntenne 7
SCHEMATIC (sheet 1 0f 8) .....zuusseesessneeseensenseenennnensesssnnnnsnnensnnsnnnnannnnnnnonsnnsnonnnnnonsnnssarna 8
SCHEMATIC (sheet 2 0f 8) ........uursssessennssnsnsnnesnnnsnnnnnnnssnensnnsnnssnnnsnnanennnnnonsnssnonssnonnnrsnne 9
SCHEMATIC (sheet 3 0f 8) ..........2sssssssnssnnsssnnnnnnessenssnnnnensnnssonsnnssnensnnssnnnanssnnnnonsnnnannnannn 10
SCHEMATIC (sheet 4 0f 8) ...........4uuus20s0nsrsnnnsnsnnsnsnnnnnnnnsnnnsnnennnnnssnnnnnonsnnnnsnnennnenssnenennnanen 11
SCHEMATIC (sheet 5 0f 8) ..............22s22s0snunnnsnnnnnnunsnnnnnnnsnnunnnsnnnnansnnnnnsnssnnnnsnnsnsnnnsnnnnnnne 12
SCHEMATIC (sheet 6 0f 8) .....uunereennennnnnnsennnnennnnnnennnnntnnnonnsnonsnsnnnsnnnnsnonnnnnensnnnnonsnnnnnnnne 13
SCHEMATIC (sheet 7 0f 8) ..........uu@2200s44400neeennennnnnnnnnunennsnnenenennnnnnnnnnnnnnnnsnnssnsnsssnsnssnnnnnnne 14
SCHEMATIC (sheet 8 of 8) ............uussssssssennesnnnnnsnnnnnnnnenunnnnnsnsnnonsnsnnnssnnsnensnsssnnnnnsnnnnnansnen 15
RAM EXPANDER
PARTS LIST ..........2222220000usnnnsnnsnnnnnnnnunssnnnonnnnnunsnnnnnnnnnnnsnnnenssnnnsssssnansennnnssssssnnssssssnonnnennnns 16
BOARD LAYOUT .....22222222400nenennnnnnnnnnnenennnnnensnnnensnnnnnnnsnonnnssonsnannssssensnansnnnssssnnssssnnnsnssssnnne 16
SCHEMATIC ....... Sabukennununussussuunsnnnennusnussunnnuensssnennnssnnsnsenunnsunnnnnunnnannnsssntohnesssusnssssenhesnssnsues 16
MAJOR VENDORS LIST .......2csssuesssssssnnnnnssnsnnnnnunnennnnnsnnnnnnnnnnnnnsnenssnnnsnnnsssnsssssnssssonsnsssnsssssnnnnnne 17
PC10-1, PC10-2
MEMORY MAP .nneeesssssssnnensssssonsnnsnsnsensnnsnsensonssnsnnenssnnensnnnsnnnnnnsssnnsssanssnnsnsnnssssssssesnsnsnsnnn 18
SWITCH SETTING (MAIN PCB) ......uuessesesesssneseenensonnnennnnnnnnnenonsnnnnnnnnnnennrnnnsesnsnsnsssnssnnsnnn 19
ATI CARD SWITCH SETTING ....eeseesssnsssessssnnnonesnennennnnnnannnonnnnnnsnnsnensannnnnnssssssnssssssssnsennn 20
FLOPPY DRIVE (CHINON F502) TERMINATORS .....u..cussersorsnessnennrsnnsennnsnssnnesnennennnenenen 21
HD MOUNTING KIT .....eeeneesunnsenssnssnnenonsonnaennesnnennenansnnnnnnansnsnensennssnsssssnssssessnnnsanssnsnnnannnn 22
BIOS SELF TEST ERROR MESSAGE ....uueessessnssesennennnnnnnennnnsnnnnnnnnnnnsnnsnsnnsnnenssnnnsannnnnn 23
25

PC10-1/10-2/10-1l SERVICE MANUAL
CONTENTS (continued)
TITLE PAGE
PC10-II1
TECHNICAL
SPECIFICATIONS
..........
Unnnnenssnssnssnssnssssennsnnssnssnssnsensensnntentnnennnnnnsnenstsenenen
26
DIP
SWITCH
SETTINGS
snnaesanennnnnnnennnnnennnnnnnnnnnnnnnnennannnnnnnannnnnnnnnnnnnnnnnnnnnnnnnnnnnannnnnnenene
27
JUMPER
SETTINGS
auananassnsnnaneenennnnnnnennennnnnnunnnnnnnennennnnnnnnennasnnnnasnnnnnennsnnnnennennnnnnnnnenennn
28
CONNECTOR PIN OUTS snnenseensennnnnenennennennnennnnnnnnnnnnnnnnnnnnnsnneneennennnannannnnnnnennennenannenenn 29
MAJOR PARTS LIST sannnarsesennnnnnnnnnnnnnnnnnnnnnennnnnennennennennnsnesnnennnennenannnennnnennennenennnnnenenaneen 30
COMPONENT PARTS LIST acenessenenenenennensnnennnennnnnnnnnnnennnnnnnnannennannnanennnennnnennnnennnnennnne 31
PCB LAYOUT seenaesansnennnennnnnnennennnnannenennennenennnnnnnnnnnnannsnnnnnnnnnnnnnnsnnnnnnennennnnnnnsnnennnnennnnnnennn 33
SCHEMATICS aceannennnnannnnnnnnnnnennnnennanennennennensansenennnnnnennnnnnunnnnnnnnsnnennennennennnnnnnenennenenenenn 34
MEMORY MAP annnensnaeseneeenneen Teannennsnnenusunsnussnssnsenusensennsennennnennsennsensennssnennssnnensnnnnnennnnnnne 40
MONITOR PROGRAM ..uassnsssensanensnnennnnnnnnnnennennsnnnennnnnennsnnennnnnennonnnnnennnnnnnennnnennnnannennnne 41
4.36 BIOS NOTES ünaeareasenennenennenennenannnnannnnnnnnnnnnnnnnnennnnnnennennnennnnnnnnnnennennnnnnnnnnnnnnnnnnnnnnnne 42
KEYBOARD SCHEMATIC ..uneasssenssnsensnnannennsunsennennennnennnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnenn 43
POWER SUPPLY SCHEMATIC cneeasessnssnssnnsnnsannnnennnnnnnennnnnnnnnnnnennnennnnnennnennnnnnnnnnnnnnennnen 44
POWER SUPPLY PCB LAYOUT cnessssenssnsnnennennansennsnnnunannnnansannennennsennensansensennennnnennennnnnnen 45
POWER SUPPLY PARTS LIST ........22sssssssssnsnonnennnnnnnnssnsonnsnnsnnnnnssnnnsnnsnsonsnensnnnsnnnnenenennne 46

PC10-1/10-2/10-ll SERVICE MANUAL
SPECIFICATIONS
PC10-1
MEMORY
ROM PHOENIX BIOS (16K)
RAM 512K WITH PARITY
RAM EXPANDABLE
ON BOARD YES
ON SLOTS YES
CPU
TYPE 8088
CLOCK SPEED 4.77 MHz
8087 MATH CO-PROCESSOR
NUMBER OF SLOTS
OPERATING SYSTEM
KEYBOARD
NUMBER OF KEYS
TYPE
NUMERIC KEYPAD
FUNCTION KEYS
POWER SUPPLY
OUTPUT RATING
MAXIMUM CONFIGURATION SUPPORTED
INPUT/OUTPUT PORTS
RS-232C SERIAL
CENTRONICS PARALLEL
STORAGE
FLOPPY DRIVE CONTROLLER
FLOPPY DRIVES
HARD DRIVE
VIDEO
ATI "GRAPHICS SOLUTION” ADAPTER
e MODES
1) MONOCHORME ADAPTER
2) COLOR/GRAPHICS ADAPTER
SOCKET ON BOARD
5 FULL LENGTH
MS-DOS 3.2
85
TYPEWRITER STYLE
YES
10
112 WATTS
TWO FLOPPY DRIVES + 40 MB HARD DRIVE
+ 5 EXPANSION CARDS
BUILT-IN
BUILT-IN
BUILT-IN SUPPORTS FOUR DRIVES
SINGLE HALF-HEIGHT
OPTIONAL BRACKETS FOR HALF OR
FULL HEIGHT
STANDARD
3) HERCULES MONO GRAPHIC ADAPTER
4) PLANTRONICS COLORPLUS ADAPTER
5) EMULATION OF COLOR/GRAPHICS
ADAPTER ON MONOCHROME MONITOR
e TEXT MODES
40 x 25
80 x 25
132 x 25
132 x 44
e GRAPHICS MODES
320 x 200 (4 OR 16 COLORS)
640 x 200 (2, 4, OR 16 COLORS)
720 x 348 (HERCULES COMPATIBLE)
e COMPATIBLE MONITORS
IBM COMPATIBLE TTL MONOCHROME
RGBI COLOR
COMPOSITE COLOR OR MONOCHROME
AUDIO
POLYPHONIC TONES YES

PC10-1/10-2/10-ll SERVICE MANUAL
SPECIFICATIONS
PC10-2
MEMORY
ROM PHOENIX BIOS (16K)
RAM 620K WITH PARITY
RAM EXPANDABLE
ON BOARD N/A
ON SLOTS N/A
CPU
TYPE 8088
CLOCK SPEED 4.77 MHz
8087 MATH CO-PROCESSOR
NUMBER OF SLOTS
OPERATING SYSTEM
KEYBOARD
NUMBER OF KEYS
TYPE
NUMERIC KEYPAD
FUNCTION KEYS
POWER SUPPLY
OUTPUT RATING
MAXIMUM CONFIGURATION SUPPORTED
INPUT/OUTPUT PORTS
RS-232C SERIAL
CENTRONICS PARALLEL
STORAGE
FLOPPY DRIVE CONTROLLER
FLOPPY DRIVES
HARD DRIVE
VIDEO
ATI "GRAPHICS SOLUTION” ADAPTER
e MODES
1) MONOCHORME ADAPTER
2) COLOR/GRAPHICS ADAPTER
3) HERCULES MONO GRAPHIC ADAPTER
4) PLANTRONICS COLORPLUS ADAPTER
5) EMULATION OF COLOR/GRAPHICS
ADAPTER ON MONOCHROME MONITOR
e TEXT MODES
40x25
80 x 25
132 x 25
132 x 44
e GRAPHICS MODES
320 x 200 (4 OR 16 COLORS)
640 x 200 (2, 4, OR 16 COLORS)
720 x 348 (HERCULES COMPATIBLE)
e COMPATIBLE MONITORS
IBM COMPATIBLE TTL MONOCHROME
RGBI COLOR
COMPOSITE COLOR OR MONOCHROME
AUDIO
POLYPHONIC TONES
SOCKET ON BOARD
5 FULL LENGTH
MS-DOS 3.2
85
TYPEWRITER STYLE
YES
10
112 WATTS
TWO FLOPPY DRIVES + 40 MB HARD DRIVE
+ 5 EXPANSION CARDS
BUILT-IN
BUILT-IN
BUILT-IN SUPPORTS FOUR DRIVES
DUAL HALF-HEIGHT
OPTIONAL BRACKETS FOR HALF OR
FULL HEIGHT
STANDARD
YES

BOARD LAYOUT
A = 8088 CPU L = Parallel interface
B = 8087 coprocessor M= Serial interface
C = Interrupt controller N = I/O expansion slots
D
=
DMA
controller
O
=
Internal
keyboard
connector
E = System registers Q = Parallel printer connector
F = Timer R = Internal serial connector
G= PAL address decoder S = Loudspeaker connector
H = ROM/EPROM BIOS T = Floppy activity LED connector
I = DIP switch U = Power connector
J = Keyboard interface V = J14 Serial, Parallel, and Floppy
K = Floppy controller configuration jumpers
14.318 MHz
ı0
Register
“
PC10-1/10-2/10-1ll SERVICE MANUAL
8088
MAIN-
PROCESSOR
D0-07 74 | 0-07
ıs
245
PARALLEL DATA
(PRINTER)
ASYNCH.
COM.
INTERF.
SERIAL DATA
SERIAL CONTROL LINES (RS 232)
8087
c0-
PROCESSOR
MC
1489
A12-A19
74
LS
FLOPPY INTERFACE
8288
BUS-
CTRL
02.07 | 74 -
n DRAVSEL 1-4
DRIVES 1-4
174
DATA INPUT
DRIVE CONTROL
PARALLEL CONTROL LINES
(PRINTER)
READ CLOCK
FDC
CONTROL
FLOPPY
DISK
CONTR.
74 | a0-A-3
CONTROL
A16-A19
waData| 74
LS | wRDATA WADATA
175
714
LS
DATA OUTPUT
CONTROL
VOLTAGE
CLOCK
AB-A15
74
LS
74 LS 629
CLOCK GEN. FREQUENCY ADJUST
SERIAL KEYBOARD
825100
BLOCK DIAGRAM

PC10-1/10-2/10-Ill SERVICE MANUAL
MAJOR PARTS LIST PC10-1/PC10-2
PC10-1 (SINGLE DRIVE, 512K)
PC10-2 (DUAL DRIVE, 640K)
MAIN ASSEMBLY
TOP HOUSING
BOTTOM HOUSING
FRONT PANEL
POWER CORD
KEYBOARD ASSEMBLY
PCB ASSEMBLY COMBINED MAIN BOARD
PCB ASSEMBLY RAM EXP 384K
PCB ASSEMBLY RAM EXP 256K
PCB ASSEMBLY ATI (MONO/COLOR VIDEO)
FLOPPY DISK DRIVE
SPEAKER ASSEMBLY
POWER SUPPLY ASSEMBLY
POWER SUPPLY ASSEMBLY SUB:
POWER ON LED ASSEMBLY
CABLE ASSEMBLY - KEYBOARD CONNECTOR
CABLE ASSEMBLY - RS232
CABLE ASSEMBLY - DRIVE
DOS MANUAL
BASIC MANUAL
312200-01
312200-03
380073-01
380101-01
380100-02
380 102-01
903508-04
380008-02
380064-01
380065-01
380065-02
380069-01
380111-01
8256099-03
380021-02
390138-01
380016-01
380017-01
312208-01
380012-02
319905-01
319906-01

PC10-1/10-2/10-ll SERVICE MANUAL
PARTS LIST
PCB ASSY. #380064
Commodore part numbers are provided for reference only and do not indicate the availability of parts from Commodore.
Industry standard parts (Resistors, Capacitors, Connectors) should be secured locally. Approved cross-references for TTL
chips, Transistors, etc. are available in manual form through the Service Department, order #314000-01.
INTEGRATED CIRCUITS INTEGRATED CIRCUITS (continued)
U1,45 _ U70 74LS125 Buffer 901521-20
11,69,72 | 741574 D Type Flip F 901521-06 Uri 8250 ACI 380205-01
U2,45,73
|
741504
Inverter
901521-02
U74
74175
4
Bit
D-FF
901522-43
U3 7407 Buffer 901522-30 U75 7415365 6 Bit Buffer 901521-48
U6 741LS08 AND 901521-03 U77 7415374 D Type FF 901521-43
u7 7418155 901521-79 U78 MC1489 Line Recvr 901524-07
U8
7415273
8
Bit
D-FF
901521-42
U79
MC1488
Line
Driver
901524-06
U9,17 _
51,76
7415244
8 Bit
Buffer
901521-13
DIODES
i 901521-72
u2
7a1.8870 Register
Fie
soisaı.g2
|]
D2.D8
|
1
N
4001
1A/S0V
900750-01
U13,52, _ Di 1N 4148 50mA/50V 900850-01
55
7418373
D
Latch
901521-29
.
u14 8237A-5 DMACnti 380203-01 || RFSISTORS — Al values are In onmscut W
U15 8259A Intrpt Cntr 901874-01
U16 8253A-5 Timer 380202-01 R1-4,16, R28 8K2 ohm
U18,21, _ 18,29,30 33 ohm R22 10K ohm
42,56,43 | 74LS245 Buffer 901521-46 R24 68 ohm R25 47K ohm
U19 74LS367 6 Bit Buffer 901521-47 R13 220 ohm R26 82K ohm
U20 74L5257 MUX 901521-57 R31 540 ohm R14,15 1M ohm
U22-U30 | Dram 256Kx1 150ns 380223-01 R32 820 ohm R33 Trimmer
U31 74LS11 AND 901521-80 R17 1K2 ohm 0.1W 2K2
U32,33 74HCT158 MUX 380227-04 R8-12,19, (Valvo,
Sub: 745158 MUX 901525-31 20,23,27 | 2K2 ohm ECP 10
U34 745280 Parity Gen 901525-29 R5,21 4K7 ohm Type '‘S”)
U35 74HCT32 OR 380227-01
U36 Delay Line 50ns 324667-01 GAPACITORS
U37 74500 NAND 901525-04 C84.C95 | Ceramic 2200 pF, 50V
U38 16L8 PAL 380257-01 C96 Ceramic 22 pF, 50V
U39 7700 PLA Decode2 380212-08 c97 Ceramic 47 pF, 50V
Sub: FPLA 82S100 9380212-08 C102 Ceramic 82 pF, 50V
U40 7700 PLA Decode1 380212-07 C81-83,
Sub: FPLA 825100 380212-07 161-169 Ceramic 100 pF, 100V
UA BIOS EPROM 27128 380258-03 c101 Ceramic 150 pF, 50V
U44 74LS02 NOR 901521-21 C107-114,
U46,58, _ 126-145 Ceramic 1000 pF, 25V
61 74LS175 4 Bit D-FF 901521-34 C1-6,11-13,
U47 74574 D Type FlipFlop 901525-09 17-21,31,35,
U48 8288 Bus Cntrl 901876-01 37,42-44,46,
U49 8087 Co-Processor 380201-01 47,51,52,54,
U50 8088 CPU 5MHz 380200-01 58,61,66-70,
U53 8284A CIk Gen 901875-01 73,77,78 Ceramic 0.1 „F, 50V
U54 74ALS11 AND 380230-02 C14-16,22-
U57 741LS163 Counter 901521-33 30,32,33,34,
U59 7415629 VCO 901521-84 36,38-41,
U60 1691 Data Separator 380207-01 48-50,53,56,
U62 74LS123 Monoflop 901521-49 59,60,64,71,
U63 7415174 6 Bit D-FF 901521-63 80,99,100,
U64 „PD765AC-2 FDC 380206-01 115-125,1461
U65 741514 Schmitt-Trig 901521-30 148,158-160
U66-68 7438 NAND/OC 901522-09 170,171 Ceramic 0.22 „F, 50V

PC10-1/10-2/10-1ll
SERVICE
MANUAL
PARTS LIST (continued)
CAPACITORS (Continued) CONNECTORS
C98 Polyester 0.68 „F, 63V J2 CNNT 25P Mini Din 380307-02
C149-157, (Female, Amp 167131-1)
173 Electro. Rad 47uF, 25V J8.J12 CNNT 2x31P Edge 903446-02
C172 Electro. Axial 47uF, 16V (Tl or TRW Equiv.
TR Var 2-40 pF .100 Center)
7 CNNT 6P Female 903349-01
MISCELLANEOUS (Amp 350 827-01)
Q2 1.8432 Crystal 900555-02 TRANSISTORS
03
8.0000
Crystal
900556-01
91 14.31818 Crystal 900558-01 T1, T2 NPN BC 337-16 324220-01
VR1 7905 Volt Reg -5V 901527-03
L1 Coil 100 „H 3 ohm 980329-01
sw Dip Switch 903349-01

PC10-1/10-2/10-ll
SERVICE
MANUAL
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PC10-1/10-2/10-1l SERVICE MANUAL
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PCB ASSY. #380504 (sheet 1 of 8)
[0
)

PC10-1/10-2/10-Ill SERVICE MANUAL
BAS-19
DBDIR
Yy FHLSB2
u6 PGcs
ara!
INTR
IRQ2
IR93
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PARTS LIST
RAM EXPANDER
Commodore
part
numbers
are
provided
for
reference
only
and
do
not
indicate
the
availability
of
parts
from
Commodore.
Industry
standard
parts
(Resistors,
Capacitors,
Connectors)
should
be
secured
locally.
Approved
cross-references
for
TTL
chips,
Transistors,
etc.
are
available
in
manual
form
through
the
Service
Department,
order
#314000-01.
INTEGRATED CIRCUITS RESISTORS
U1-9 4256 256Kx1 Dram 380223-01 Ri 33 ohm 1/4W
U12-15 4464 64Kx4 Dram 380256-01 RA 4x33 ohm SIP
U10,11 4164 64Kx1 Dram 904150-02
CONNECTORS
CAPACITORS
J1 CNNT 34P Female 38031 1-01
C16 Electrol Axial 474F 16V (Amp 1-166 592-7)
C1-15 Ceramic 0.224F 50V
BOARD LAYOUT
c1 22 63 ca 6 c6 c7 c8
DIDI
° 1 u2 u3 171 5 U6 u7 u8
ASSY. NO.
380065
FAB. NO.
380382 | |
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c9 C10 c11 2 C14 C15
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|
Ri C16
+ |
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1985 COMMODORE PC
2
34
RAM
EXTENSION