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Kawasaki KZ1300-A1 Quick Reference Manual Page 325

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SUPPLEMENT --1981 MODEL
Igniter:
The Ie
igniter
has the
following functions as well as
the
functions
explained
in
the
introduction.
1.
Time-controlled cutting off
If
the
ignition sw itch is left turned on but the engine
is not running, the primary current may continue
to
flow through a certain ignition coil (depending on the
crankshaft position). If this condition continues, the
battery will be discharged, and the ignition coil and the
power transistor will be damaged by
overheating.
To
prevent such
a
problem, a timer circuit is provided
to
cut
off the primary current automatically
a
few seconds
after the engine stops.
However, once the engine
is
cranked
and the first
signal from the pickup arrives
at
the
igniter, the
timer circuit returns to its original state
to permit the primary current to flow
.
A. IC Igniter
2.
Dwell-angle control
The dwell angle is electronically controlled so that
it
increases as the engine speed
increases.
This is to save
the electric power at low engine speed, and to produce a
spark of sufficient strength at high engine speed.
3.
Voltage regulating
A
voltage
regulating circuit is equipped in the circuit-
ry
.
The
voltage
regulating circuit supplies an even
voltage (6 volts) to the other circuits in the igniter des-
pite variations in battery voltage.
As a result, stable
operation of the igniter
is
ensured
.
Moreover, the vol-
tage regulating circuit protects the circuitry from surge
currents in the power
lines.
The
internal
circuits of the Ie igniter of the 1979 and
1980 models consists of three separate parts. Each part
works independently for each pair of
cylinders.
For the
1981 model Ie igniter, the internal circuits other than
the amplifier circuits are used in common for all cylin-
ders.
This makes the
Ie
igniter more
compact.
The
signal-compound circuit gathers up the pulses sent from
the three pickups, and sends them to the timing-control
and the dwell-angle control
circuits.
These circuits
dictate the proper ignition timing and dwell angle to the
master
controller.
The master controller distributes the
control signals to the correct amplifier to ignite the
cylinders.
Safety
Instructions:
There are
a number
of
important
precautions that
must be observed when servicing the
transistor ignition
system. Failure to observe
these
precautions can
result
in serious
system
damage.
Learn and observe
all the
rules listed
below.
1. Because of limited
capacity
of the voltage regulating
circuit
in the
IC igniter, do not disconnect the
battery
leads
or
any
other electrical connections when the
ignition switch is
on, or while
the engine is running.
This is to
prevent
IC igniter damage.
2. Do not
install
the
battery
backwards. The
negative
side is
grounded.
This is
to prevent damage
to the
diodes.
Ignition
system troubleshooting
guide
If
trouble is suspected in the ignition system, check
the system by the following procedure.
An example of troubleshooting is shown in Fig.
N70.
To use this chart, follow the arrows on the chart select-
ing a
"yes"
or
"
no" arrow at
each
diamond-shaped step
until
you reach the
"end
".
Each test
procedure
is ex-
plained
individually.
Discription of Each Testing Procedure
1.
To Check the Ignition Spark
-Connect
the strobe light to each spark plug lead in the
manner prescribed by the manufacturer.
eTurn
on the main switch,
ignition
switch
,
and engine
stop switch
.
*Push
the starter button, and make
sure that
the strobe
light goes on and off.
325

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