Commodore PC 10-1 User manual

SERVICE MANUAL
PC 10-1/10-2/10-IIl
APRIL, 1989 PN-314860-01
C= Commodore

SERVICE
MANUAL
PC
10-1/10-2/10-III
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-IIl SERVICE MANUAL
CONTENTS
TITLE PAGE
SPECIFICATIONS
PC
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024
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seasons
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Set
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ban
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tunes
ovecaeen
ss
1
SPECIFICATIONS
PCI1
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casccactacsosssecitarerocnaniene
crannies
secyieaenavatanta
lcd
eaueiae
ted
eo
teataeseb
ek
2
BLOC
DIAGRAM
crises
ict
cas
ee
nee
eae
esa
adc
ds
pac
cds
Sab
ic
eeeneacaic
eceisuaeanee
econ
ease
3
ECARD
EA
VOI
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sisctcrcrccccieca
tose
vacate
paca
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Sages
te
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codes
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steno
3
MAJOR
PARTS
LIST
csccceccicocitoc
sx
vgists
da
Bile
catanni
Resmonorccnicgnaascosstaia
bed
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stacnaecs
nnndanseceunadsbante
deans
4
PCB ASSEMBLY #380064
PATS UST secretes sees bees ava tied aa gnc Sea vedere Saeco au eaten ba vats ahaa teeta es 5
BOARD AVOUT circa senate seadnc teotodeceteds Soeatsecplews Seem adusacsand Sued amar at enuseoarelen tae 7
SCHEMATIC:(Sheet. 1 Of 8) a.ctosncunisenesdeuses.osssaaaiendonnwhvon vsoeavareaswncerhotan gy eveduaeseecdveptatooddess 8
SCHEMATIC (sheet: 200 8) siciersetssvimireaiarertnanteemtn eisisstneend head da deadly Grataaareseatvaee 9
SCHEMATIC: (Sheet:S Of 8) e.sesdeess ies seseuecees sess sacqustsasaas tecnica ies avedb ot scat sats ennya aangemuntescaudens 10
SCHEMATIC (sheet 4: Of 8) sscccsss.cccsscotnstocacssecenustaussnaucgecsestecesceddvwaiaaddeassssvschasslescaloenssess 11
SCHEMATIC (Sheet: 5:08 8) cu.tiisucerenn ieee vaitsieg avo uiessiiea sus scastareessedsaraatinssinedibesses aes 12
SCHEMATIC (sheet: 6 Of 8) cscsccescecsisdsdstancdtavacasiabsiteantesstadeavacioussandeaisdbescsdvocvordentedeceentce 13
SCHEMATIC. (SNGGE 7 O08) iisilatavcs enetecnc creck sade seoaeeeecseeecateel saan Rie nea taca atin needed iecagewuns 14
SCHEMATIC: (Sheet B08 8). 2isssiiavaicessnspceteceiccueestigiatecd cen de laverdis oolacoucvssieetiestebsceeseceGeccseees 15
RAM EXPANDER
PATS EIST: fess sccicesviescsucduicsqv ana wacea hadcaysexGs eiaplestccs aavaich oy avecaseudecadeanegeies aibie eamuasyasneseaeseeeees 16
BOARD: LAV OUD esis sccisisyinuistedelnicatctietarasespesceiiachidacercieaenitep Widbadin tobenvnco hin cb vaobeademcsnedocsass 16
SCHEMATIC ...... a ita oe cas lace sasha evs vauateasls Ste thea heaeo ual dala cay ofa mranetaameen lees ania ab uaepatentelsass 16
MAJOR VENDORS: UIST: sip iivisatuns stu cdiernsscatoledhintecsccgscetabavesputls tun ide audtta sarin ine Rieddeomepuavessdapaoiuniees 17
PC10-1, PC10-2
MEMORY MAP ‘sscquistvcstecatssvsaxscucsd nats yognartayansaatesdaadessiddadsesseccoeeasuceunbiseavayneridss'cdscas habeas 18
SWITCH SETTING (MAIN: PGB) ‘si sscsssccasccoscvscsbscvderdedsacouslvneededeasstvivsasots conndadvonsetedsncendecase 19
ATT CARD ‘SWITCH SET TUNG): is iioscssiscsssedsssstieis cqntaytodnesdegnendive we vaesavitleowistannnsessceseensads 20
FLOPPY DRIVE (CHINON F502) TERMINATORS ............cccsscessesscssssessseseeseesesteaseeseeens 21
PID MOUNTING WIT sscveccutes usta scesbcy etuveasvenigedves dedpounetumunyl cass vevsuane olives pavorseen cassereedascauces 22
BIOS SELF TEST ERROR: MESSAGE ‘cii.ssccoscsaccscasvsizzeccsnecasssnssoniocnassansansiacdsbdssaeseseaseeeee 23
25

PC10-1/10-2/10-IIl SERVICE MANUAL
CONTENTS (continued)
TITLE PAGE
PC10-III
TECHNICAL
SPECIFICATIONS
...........
Ope
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as
scent
aye
Acoso
se
26
DIP
SWITCH
SETTINGS
ccesccsssecsececsecsessccsscssssecsucssecssecsecssessssssssessssosssursuesessessessessesesecees
27
JUMPER
SETTINGS
ccccccccccssccscsecsscoccesssccsoccsesssssssescacsoesocscecessassssecsecescessessesnscsscssseeesececes
28
CONNECTOR PIN OUTS ccccccccsecscssecsssssssssssssscccsecsucsssssecssessssssscsesssscsscsssssessesersecsesseesees 29
MAJOR CPA TS LIS cose tieccesermaa ica deacon tna liet EEE ana ols 30
COMPONENT PARTS: LIST cuccsticsceszceseaetrccte na ce ase acsias a decusetec ct oe need cecvees 31
POE LAV OUT sr cilactsons sosuisesntets ovat eco ndicacsad cla Maou beaotactac sate tunes ncesgmunnuedeeeqese 33
SIE WA TICS skeet ecces ecmeencaes caplet ate hah Dosa ciu caoeees hale Macao het Renata oes 34
MEMORY MAP. ......ccsscssssesseeseees Re ERATE Ye RN TEC TEN Ce ett oem RTE IOT TENOR EI 40
MONITOR PROGRAM oot. ean ts ast tee ee eee iee hce ls 41
AGG BIOS NOTES recs sescese sien Gee eset eae siphon yin A astbecchegeeetensetes 42
KEYBOARD SCHEMATIC ......scssssscssssssssssssssssssssssssccssssssecscccsecesecsccssecsscessssecusssscessecsecsees 43
POWER SUPPLY SCHEMATIC ...c.ccsccsscsscsssssssssessssssscssscsecssesssesssecsesstecucssesussessessesseenees 44
POWER SUPPLY PCB LAYOUT ....cccccscsscsscssssssssssssssssssessesssssssssesstsssssssessssesssensnessseses 45
POWER: SUPPLY“ PARTS LIST casi sesscaseese nace cssins vbabewseatestansdiesclutsienat be codeangipnetearevenedveeteudets 46

MEMORY
ROM
RAM
RAM EXPANDABLE
ON BOARD
ON SLOTS
CPU
TYPE
CLOCK SPEED
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
¢ MODES
1) MONOCHORME ADAPTER
2) COLOR/GRAPHICS ADAPTER
PC10-1/10-2/10-Il SERVICE MANUAL
SPECIFICATIONS
PHOENIX BIOS (16K)
512K WITH PARITY
YES
YES
8088
4.77 MHz
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)
¢ COMPATIBLE MONITORS
IBM COMPATIBLE TTL MONOCHROME
RGBI COLOR
COMPOSITE COLOR OR MONOCHROME
AUDIO
POLYPHONIC TONES YES

MEMORY
ROM
RAM
RAM EXPANDABLE
ON BOARD
ON SLOTS
CPU
TYPE
CLOCK SPEED
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
PC10-1/10-2/10-II1 SERVICE MANUAL
SPECIFICATIONS
PHOENIX BIOS (16K)
620K WITH PARITY
N/A
N/A
8088
4.77 MHz
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
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
© GRAPHICS MODES
320 x 200 (4 OR 16 COLORS)
640 x 200 (2, 4, OR 16 COLORS)
720 x 348 (HERCULES COMPATIBLE)
© COMPATIBLE MONITORS
IBM COMPATIBLE TTL MONOCHROME
RGBI COLOR
COMPOSITE COLOR OR MONOCHROME
AUDIO
POLYPHONIC TONES YES

BOARD LAYOUT
A = 8088 CPU
B = 8087 coprocessor
C = Interrupt controller
D = DMA controller
E = System registers
F = Timer
G= PAL address decoder
H = ROM/EPROM BIOS
| = DIP switch
J = Keyboard interface
K = Floppy controller
He ay iasy
L = Parallel interface
M= Serial interface
N = I/O expansion slots
O = Internal keyboard connector
Q = Parallel printer connector
R = Internal serial connector
S = Loudspeaker connector
T = Floppy activity LED connector
U = Power connector
V = J14 Serial, Parallel, and Floppy
configuration jumpers
14.318 MHz
AI6-A19
PC10-1/10-2/10-Ill SERVICE MANUAL
CONTROL BUS
10
ADDRESS BUS A0-A19 EXPAN
DATA BUS 0-07 =a wae
15
74] | avara
i
B
0-07
|
p0-p7
0-07 o-D7
0.07
PARALLEL DATA
(PRINTER) ASYNCH. ‘SERIAL DATA
coM.
INTERF. SERIAL CONTROL LINES (RS 232)
FLOPPY INTERFACE
02-07 1843 MHz DRVSEL 1-4
= DRIVES 1-4
DATA INPUT
74 | po-p7
ts
245
AO
—— DRIVE CONTROL
PARALLEL CONTROL LINES
(PRINTER)
CONTROL
4
is nour
175 DATA OUTPUT
CONTROL K
VOLTAGE | om
CLOCK GEN. i FREQUENCY ADJUST
SERIAL
KEYBOARD
i
Ls
167
oat BLOCK DIAGRAM

PC10-1/10-2/10-IIl 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
380102-01
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-Ill 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)
— 74LS125 Buffer 901521-20
74LS74 D Type Flip F 901521-06 8250 ACI 380205-01
74LS04
Inverter
901521-02
74175
4
Bit
D-FF
901522-43
7407
Buffer
901522-30
74LS365
6
Bit
Buffer
901521-48
74LS08 AND 901521-03 74LS374 D Type FF 901521-43
74LS155 901521-79 MC 1489 Line Recvr 901524-07
74LS273 8 Bit D-FF 901521-42 MC 1488 Line Driver 901524-06
74LS244
8
Bit
Buffer
901521-13
74LS299
Shift
Reg
901521-72
74L$670
Register
File
901521-82
D2,D3
|
1
N
4001
1A/50V
900750-01
D1
1N
4148
SOmA/SOV
900850-01
74LS373 D Latch 901521-29
8237A-5 DMA Cntrl 380203-01
8259A Intrpt Cntr 901874-01
8253A-5 Timer 380202-01 R1-4,16, 8K2 ohm
i 18,29,30 | 33 ohm 10K ohm
74LS245 Buffer 901521-46 R24 68 ohm 47K ohm
74LS367 6 Bit Buffer 901521-47 R13 220 ohm 82K ohm
74LS257 MUX 901521-57 R31 510 ohm 1M ohm
Dram 256Kx1 150ns 380223-01 R32 820 ohm Trimmer
74LS11 AND 901521-80 R17 1K2 ohm 0.1W 2K2
74HCT158 MUX 380227-04 R8-12,19, (Valvo,
Sub: 74S158 MUX 901525-31 20,23,27. | 2K2 ohm ECP 10
74S280 Parity Gen 901525-29 R5,21 4K7 ohm Type ‘“‘S’’)
74HCT32 OR 380227-01
Delay Line 50ns 324667-01
74S00 NAND 901525-04 C84-C95_ | Ceramic 2200 pF,
16L8 PAL 380257-01 C96 Ceramic 22 pF,
7700 PLA Decode2 380212-08 C97 Ceramic 47 pF,
Sub: FPLA 82S100 380212-08 C102 Ceramic 82 pF,
7700 PLA Decode1 380212-07 C81-83,
Sub: FPLA 82S100 380212-07 161-169 Ceramic 100 pF,
BIOS EPROM 27128 380258-03 C101 Ceramic 150 pF,
74LS02 NOR 901521-21 C107-114,
_
126-145
Ceramic
1000
pF,
74LS175 4 Bit D-FF 901521-34 C1-6,11-13,
74874 D Type FlipFlop 901525-09 17-21,31,35,
8288 Bus Cntrl 901876-01
8087 Co-Processor 380201-01
8088 CPU 5MHz 380200-01
8284A Clk Gen 901875-01 Ceramic 0.1 »F, 50V
74ALS11 AND 380230-02
74LS163 Counter 901521-33
74LS629 VCO 901521-84
1691 Data Separator 380207-01
74LS123 Monoflop 901521-49 59,60,64,71,
74LS174 6 Bit D-FF 901521-63 80,99,100,
pPD765AC-2 FDC 380206-01
74LS14 Schmitt-Trig 901521-30
7438 NAND/OC 901522-09 Ceramic 0.22 pF, 50V
RESISTORS — All values are in ohms-1/4 W
5% unless noted otherwise.

PARTS LIST (continued)
CAPACITORS (Continued)
Polyester 0.68 y»F, 63V
Electro. Rad 47yF, 25V
Electro. Axial 47pF, 16V
Var 2-40 pF
1.8432 Crystal
8.0000 Crystal
14.31818 Crystal
7905 Volt Reg -5V
Coil 100 »H 3 ohm
Dip Switch
900555-02
900556-01
900558-01
901527-03
380329-01
903349-01
PC10-1/10-2/10-Il]
SERVICE
MANUAL
CONNECTORS
CNNT 25P Mini Din 380307-02
(Female, Amp 167131-1)
CNNT 2x31P Edge 903446-02
(Tl or TRW Equiv.
.100 Center)
CNNT 6P Female 903349-01
(Amp 350 827-01)
TRANSISTORS
NPN BC 337-16 324220-01

PC10-1/10-2/10-Ill
SERVICE
MANUAL
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PC10-1/10-2/10-Ill SERVICE MANUAL
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PC10-1/10-2/10-IIl SERVICE MANUAL
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PC10-1/10-2/10-IIl SERVICE MANUAL
8x 3300HN
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1
ao

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
<2
aa
the
Service
Department,
order
#314000-01.
INTEGRATED
CIRCUITS
fResistoRS,
sid
4256 256Kx1 Dram 380223-01 R1 33 ohm 1/4W
4464 64Kx4 Dram 380256-01 RA1 4x33 ohm SIP
4164 64Kx1 Dram 904150-02
CONNECTORS
CAPACITORS
C16 Electrol Axial 47yF 16V
C1-15 Ceramic 0.22uF 50V
CNNT 34P Female 38031 1-01
(Amp 1-166 592-7)
BOARD LAYOUT
ASSY. NO.
380065
FAB. NO.
380382
‘i
j
if
RA1
1985 COMMODORE PC
RAM EXTENSION