Service Manual Miditron
®
Junior
II
/ ID 1997491 / MJ / 1.0 - June 1998 / Page 70
10. Electronics
10.3.10 LED reference position
The LED reference position determines the reference
position for the movement of the cross transport. The LED is
connected to the PCB Main via a plug.
The timing to contact all 3 LEDs and to measure the initial
frequency of the U/f-converter on the analog board is
realized via counters (three settable via software) by
partitioning the initial frequency of the micro control.
Plug functions:
10.3.11 Motor Belt Drive Cross Transport
The motor belt drive cross transport (50) is connected to the
PCB Main via a plug. The DC-motor is contacted via a
driving component. This component contains a transistor full
bridge. Therefore, a 4 quadrant use is possible when
contacted correspondingly by the micro control.
Plug functions:
PIN
50
Fig. 10
Fig. 10
52
PIN
SIGNAL
FUNCTIONS
1
+ LED
+ LED VCC
2
GND
3
not connected
4
+5V
amplifier supply
5
LSDCEND
signal LSDCEND
Tabelle: tab-14e
