Section 9 – Servicing (Continued)
104
9-3.
Membrane Transmitter Servicing.
The Membrane Transmitter M/C board is shown in Figure 9-3. Refer to the following paragraphs for
Servicing Procedures
.
9-3.1.
To Check Data.
1.) For data input use “DATA” connection to RF Head.
2.) Use “RF SW” for External Trigger input.
3.) Use TP2 for Ground.
9-3.2.
Battery Monitor Adjustment.
Connect power supply to battery leads observing polarity and set supply voltage to 5.8 volts. Adjust Battery
Monitor Potentiometer R21 to just turn off red LED on the front of the transmitter.
9-3.3.
Red LED Not Flashing.
If the red LED indicator on the transmitter does not flash when the transmitter is turned ON or while
operating a crane with the transmitter, replace the batteries; they are weak. Weak batteries may operate the
crane for a while, but the LED will not flash. If the battery is too low the battery monitor will shut the
transmitter OFF. See Section 5-6. Battery Replacement for proper procedure.
4.)
SW3 Two-Speed Mode
Switch.
5.)
Battery Monitor
Adjustment. Set for 5.8
Volts.
6.)
Battery Cable
Connections, J2A plug
and J2 alternate style.
7.)
SW4 Single-Speed Mode
Switch.
8.)
Data check points.
1.)
EPROM FW2903-0
Tactile 2-SP, FW2904-0T
1 & 2-SP Non-tactile.
2.)
SW1 “A” Access Code
Switch.
3.)
SW2 “B” Access Code Switch.
NOTE
TO DISABLE TIME-OUT-TIMER
IN TRANSMITTER TURN SW3
POSITION 3 TO ON.
Figure 9-3.
Membrane
Transmitter M/C
Module E10635
J1 Keyboard Connector
RF Head
B
ON
A
B
SW3
SW4
ON
ON
ON
1
1
1
1
_
+
1
U3
R21
J2
J2A
4.
2.
3.
TP1 +5V
JU7
JU5
JU6
TP2 GND
RF SW DATA
8.
1.
5.
6.
7.
