Commodore C16 User manual

SERVICE MANUAL
MODEL C16 COMPUTER
Preliminary
OCT. 1984
PN-314001-03
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 © 1984 by Commodore Electronics limited.
All rights reserved.

CONTENTS
Title
SPECIFICATIONS
PRODUCT PARTS LIST
......................................................................................... .
CASEWORK IDENTIFICATION
................................................................................ .
PCB LAYOUT ....................................................................................................... .
PCB PARTS LiST .................................................................................................. .
PCB SCHEMATIC DIAGRAMS ................................................................................ .
KEYBOARD MATRIX
............................................................................................. .
I.C. PINOUTS
FOR MOS DESIGN ........................................................................... .
RF MODULATOR LAYOUT .................................................................................... .
RF MODULATOR SCHEMATIC ............................................................................... .
Page
1
3
3
4
5
7
8
9
10
10
iii/iv

C16 PRODUCT SPECIFICATION
MEMORY
16K RAM Standard
ROM
32K ROM Standard (includes operating system and BASIC interpreter).
MICROPROCESSOR
7501/8501 Microprocessor with a two speed clock (.89 or 1.76 MHz).
DISPLAY
40 Columns x 25 lines of text.
COLORS
121 Colors
(1 5 colors; 8 luminance levels and Black).
CHARACTERS
Upper &
lower case letters, numerals and symbols. Reverse and flashing characters. All PET graphic
characters.
DISPLAY MODES
Text characters. High resolution graphics. Split screen text/high resolution graphics. MultiColor graphics.
Split screen/multi-color graphics.
RESOLUTION
320 x 200 Pixels
SOUND
2 Tone generators or 1 Tone and 1 noise generator.
VOLUME
8 Volume levels
KEYBOARD
Full size/full stroke
C64 style design.
KEYS
66 Keys total. 4 Cursor control keys. 4 Function keys (up to 8 user defined/programmable functions
possible). Color control keys.
HELP key. Upper and lower case character set.
INPUTS/OUTPUTS
Serial port.
ROM cartridge and parallel disk drive port. 2 Joystick ports. C1531 Cassette drive inter-
face port.
RF Output -channel 3 or 4. Video output -composite/chrominance/luminance, audio
input/output. Power supply input.

FEATURES
Built-in BASIC 3.5 -over 100 commands, statements and functions. Built-in Machine Language
Monitor -over 12 commands. Built-in graphics and sound commands. Screen window capability.
Extended screen editor.
PERIPHERALS
C1541 Disk drive, C1551 Fast Disk Drive, C1531 Datasette, MPS 802 Dot matrix printer, MPS 803
Dot matrix printer, DPS 1101 Daisy wheel printer, C1520 Plotter/Printer, C1802/1803 Color monitor,
C
1702 Color monitor.
2

TOP CASE ASSY
Top Case
Keyboard,
66 Key
LED Plate
Nameplate
Lamp Holder Set
LED Assembly
BOTTOM CASE ASSY
Bottom Case
Foot, Self-Adhesive
PCB Shield Plate, top
PCB Shield Plate, bottom
PCB Insulation Sheet
ACCESSORIES
Users Manual
Power Supply
RF Cable
Switch Box
PARTS LIST
C-16
C 251813-01
C 251798-01
C 326160-02
C 251794-01
C 903820-03
C 1001039-01
C 251790-01
C 950157-04
C 251795-01
C 251796-01
C 251797-01
C 251799-01
C 251539
C 326189-02
C 904778-01
C - Indicates Commodore Stock Part
0
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0,0 0 0
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1--
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-0 0
--
~O
D 0 D
.'---
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vD(
\\
\\
\
3 PIN CONNECTOR
FROM LED LAMP
CN9 REF.
20-PIN CONNECTOR
FROM KEYBOARD
CN2 REF.
C-1 6 Casework Identification 3

•• .,1-" 1-:'"
SOLDER
L __
BOTTOM VIEW
DETAIL E
251081-01 SHOWN
(
251081-03 SHOWN
DETAIL A
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RI COMMODORE 16 C> 1984 [ 1 C2 at e ~[
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CTI ] .---, II: II: .~I u ...... ;: I I '0" 't 1&." 20 ~ r:::: I 3 ~ I
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__________________ ~ .. L ____________________ +_------------------------------- ___ --I
SEE DETAIL A
C-16 PCB Assembly
4

PARTS LIST - C-16 PCB ASSEMBLY #250443-01
PLEASE NOTE: 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-reference for TTL chips,
Transistors,
etc., will be available in manual form through the Service Department
in November
of 1984. Unique or non-standard parts will be stocked by Commodore
and are indicated on
the parts list by a "C".
INTEGRATED CIRCUITS
U1
U2
U3
U4
U5,U6
U7,U8
U9
U10
Ull
U12
U13
U14
U15
U16
IC 7360 VSLI, Text Display (TED)
C 251535-01
Sub: IC8360 C
251535-02
IC 7501 Custom Microprocessor
C 251536-01
IC 23128 ROM TED Basic
C 318006-01
IC 23128 ROM TED Kemal
Sub: IC231 28
IC D-RAM 16 x 4
IC 74LS257
IC 7406
IC 555
IC 74LS125
IC 74LS02
C
318005-05
C 318005-04
251538-02
901521-57
901522-06
901523-01
901521-20
901521-21
IC 6529B Single Port Interface
IC 74LS139
IC 74LS175
IC 7700-010 PLA
C 251640-03
901521-18
901521-34
C 251641-02
TRANSISTORS
Q1
Q2
Q3
Q5
DIODES
2SC 1815
2SC 1815
2SC 1815
2SD 880
Dl-Dl0 IN914BFORMING
Sub:
15953(3) FORMING
Dll IN4001
D12
ZENER RD 6.8EB
Sub:
ZENER IN754A
902693-01
902694-01
251819-16
251819-07
900750-01
900927-01
900927-02
RESISTORS -All values are in ohms-1/4 W
5%, Carbon Comp -Forming
Typ, unless noted otherwise.
R1
R2
10K II R3 I 470K
4.7K R4 220K
RESISTORS (Continued)
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
18K
1.5K
470K
lK
12K
Wound 20K
5W,10%
10K
3.3K
470K
470K
R20
R21
R23
R24
R25
R26
R27
R28
R29
Rl02
47K
100K
10K
lK
lOOK
240K
240K
lK
100K
330K
RESISTOR PACK
RP1 1K 6 PIN 0.19W 2% 902441-22
902441-29
326149-06
326149-06
902441-29
RP2 3.3K 6 PIN 0.19W 2%
RP3 68K 8 PIN
RP4 68K 8 PIN
RP5 3.3K 6 PIN 0.19W 2%
CAPACITORS
Cl
C2
C3
C4
C5
C6
C7
C8
C10
Cl1
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
Elect 1flF
25V 900100-32
Elect 47 flF 25V 900100-33
Elect 10 flF 25V 900100-01
Elect
10 flF 25V 900100-01
Ceramic 0.1
flF 25V 251075-06
Ceramic 0.1 flF 25V 251075-06
Cermaic 0.22 flF 25V 251075-07
Ceramic 0.22 flF 25V 251075-07
Ceramic 0.1 flF 25V 251075-06
Ceramic 0.1 flF 25V 251075-06
Ceramic 22 pF 50V 251070-14
Ceramic 220 pF 50V 251071-26
Ceramic 150 pF 50V 251071-24
Ceramic 0.01 pF 25V 251075-01
Elect
10 flF 25V 900100-01
Elect 1
flF 16V 900100-1 6
Elect
10 flF 25V 900100-01
Elect
10 flF 25V 900100-01
Ceramic 0.01
flF 25V 251075-01
Ceramic 0.1
flF 25V 251075-06
Ceramic 0.1 flF 25V 251075-06
C - Commodore Stock Item
5

PART LIST - C16 PCB ASSEMBLY #250443-01 (Continued)
CAPACITORS (Continued) MISCELLANEOUS (Continued)
C23 Ceramic
470 pF 50V 251071-30 Cartridge Guide C 310171-01
C24 Ceramic
470 pF 50V 251071-30 Connector Panel 251791-01
C25 Ceramic
470 pF 50V 250171-30 M1
RF Modulator C 251844-01
C26 Ceramic 0.1
/kF 25V 251075-06
C28 Ceramic 0.1 /kF 25V 251075-06
FB1-5,
C30 Ceramic 0.1
/kF 25V 251075-06
FB12-19
C31 Elect 10 /kF 25V 900100-01 FB22, Ferrite
Bead 325563-01
C32 Ceramic 0.1
/kF 25V 251075-06
FB24-35
C33 Ceramic 0.1
/kF 25V 251075-06
FB37-56,
C34 Ceramic 0.1
/kF 25V 251075-06
FB58
C200 Ceramic .22
/kF 25V 251075-07
EM1-5 EMI Filter 251842-01
CT1
Capacitor, Trimmer 251029-02
CONNECTORS
MISCELLANEOUS
CN1 Connector, 50 PIN Female Edge,
Y1 Crystal 14.31818 MHZ -Expan. Gold Plated
251630-02
CL = 32 pF
251081-03 CN2 Header Pin, 20 PIN, Keyboard
Sub: 903364-01
Crystal
14.31818 MHZ 251081-01 CN3 Connector, 7
PIN MINI DIN,
Cassette C 251616-01
L1 Coil Inductor 1.2 uH
325570-01 CN4 Connector, 8 PIN MINI DIN,
L3
Line Filter 251701-01 Joy 0 Joy 1 C 251259-01
CN5 Connector, 8
PIN MINI DIN,
SW1
Switch, Rocker (PC Mount) Joy 0 Joy 1 C 251259-01
C 251587-01 CN6 Connector, 8
PIN DIN,
SW2 Switch,
Push Button C 251260-01 AudiolVideo C 325573-01
CN7 Connector, 6
PIN DIN,
VR1
Voltage Regulator 7805 901527-02 Serial Bus C 903361-01
CN8 Connector Jack,
DC Power,
F1
Fuse, Normal BLOW 250V 1.5A
Power C 251263-01
903556-18 CN9 Header Assembly, 3
PIN, LED
F1
Fuse, Clip 906102-01
903332-03
C - Commodore Stock Item
6