Canon Canola SX-300 series, Repair Manual

Page: 3 / 116

CONTENTS
1. BLOCK DIAGRA M
2. TE R M INAL & CONNECTOR LOCATION
3. K E Y BOA R D UN I T
3-1
KEYBOARD CIRCUIT
3-2 KEYBOARD CARD LAYOUT
4 . O l C A R D
4-1 A UT O C L EAR & C
4-2 N O R M A L W A V E F O R M OF AUTO CLEAR & C
4-3 CLO C K PULSES
. . 1 0
4-4
NORMAL WAVEFORM OF CLOCK PULSES
4-5
TWE & TD
.12
4-6
N ORMAL WA V E F O R M OF TWE & T D . .
. . 1 3
4-7 K B1 - K B 2 0 & D L
.14
4-8
N ORMAL WA V E F O R M O F K B 1 — KB20 & D L
. . 1 5
4-9
F LGl & F L G 2
. . 16
4-10
NORMAL WA V E F O R M O F F L G 1 , F L G2, SPR1, SPR2, TMR, AR1 — ARB,
M XR1 — MXRB & D L
.17
4-11
D ATA T R A N S FER CONT R O L
.18
4-12
ROM COMBINATION FOR KEYS & INSTRUCTIONS
20
4-13
NORMAL WAVEFORM OF SCAS, IRS, ID19 & BLK
21
4-14
INST CONVERTER & ROM
22
4-15
D ISPLAY B L O C K D I A G R A M & C A T H O D E D R I V E R
24
4-16
N ORMAL WA V E F OR M OF CA T H O D E D R I V E R
25
4-17
A NODE DR I V E R 26
4-18
N ORMAL WA V E F O R M OF 0 - 9 D I S P L A Y .
.
. . 2 7
4-19
MODE INDICTION & DISPLAY UNIT LAYOUT
28
4-20
NOR M A L W A V E F O R M OF MODE LED .. 29
4-21 IO SIGNALS
.. 30
4-22
NOR M A L W A V E F O R M OF IO & LRD FOR PRINTING
. . 3 1
4-23
PRINTING BLOCK . 32
4-24
PAPER FEED
.. 34
4-25
NORMAL WAVEFORM OF PAPER FEED
..35
4-26
TPH TRAVEL .
.. 36
4-27
NOR M A L W A V E F O R M OF TPH TRAVEL
.. 37
4-28
T PH HEAT IN G U N I T . .. 38
4-29
NORMAL WAVEFORM OF TPH HEATING
.. 39
4-30
OI CARD LAYOUT
40
4-31
O
A &
O
B TERMINAL SIGNAL TABLE
42
4-32
©
& OD T E RMINAL SIGNAL TABLE
.. 43