Adjusting Volume - Märklin 78 Series Gebrauchsanleitung

2
Operation
knob to the left of the center position
will cause the locomotive to run in
reverse. The headlights change
direction with the direction of travel
and are on all of the time. The
maximum power output of the
Delta Station is sufficient to operate
2 to a maximum of 3 single motor
locomotives at the same time.
All other functions (sound effects) are
always turned off in Delta operation.
2.3.4 Operating with AC Power
When the locomotive is operated with
AC power in conventional operation,
the 32 VA transformer (no. 6645,
6646, 6647 or 76648) can be used.
Locomotive speed is increased by
turning the control knob to the right
and is decreased by turning the knob
to the left. The direction of travel is
20
changed by turning the control knob
to the left past the "0" setting.
The command to reverse should be
given only to a standing locomotive,
never to one in motion.In operation
with alternating current the headlights
change direction with the direction of
travel and are on all of the time. The
intensity of the headlights depends
on the speed of the locomotive.
All other functions (sound effects)
are always turned off in AC power
operation.
2.3.5 Operating with DC Power
Märklin does not offer DC power
packs for 1 Gauge models. Suitable
DC power packs are those with a
maximum current of ±18 volts.
Direction reversing is done by rever-
sing polarity. The manufacturerís
instructions for a particular make of
power pack will give directions on
how to use it to operate a locomotive.
Tip:
H0 DC power packs supply a maxi-
mum voltage of ±12 volts. This loco-
motive reaches its full potential at
±16 volts. H0 DC power packs can
therefore be used only with limitations.
In operation with direct current the
headlights change direction with the
direction of travel and are on all of
the time. The intensity of the head-
lights depends on the speed of the
locomotive.
All other functions (sound effects)
are always turned off in DC power
operation.
2.4 Adjusting the Sound
Effects Circuit
Remove the locomotive body
(=> Page 37). The upper circuit
board of the two circuit boards is the
sound effects electronic circuit on
which you can carry out the following
adjustments.

2.4.1 Adjusting Volume

Important: This potentiometer is
located on the upper sound
effects electronic circuit board.
Under no circumstances should
you confuse this potentiometer
with one of the potentiometers on
the lower digital circuit board for
adjusting the running characte-
ristics of the locomotive.