Skytron ELITE 6002, Руководство по обслуживанию

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PIN NO.
CN8
OHM
COLOR PIN NO. COLOR
Red/White
White
Black
Red
White/Red
Yellow
Brown
White/Brown
Blue/White
Orange
White/Orange
Gray
White/Gray
White/Yellow
Purple/White
Black/White
Purple
White/Purple
Blue/Yellow
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
b. Test Results:
If you do not receive continuity between any of the
pins, either the micro-switch in the Pendant Control
is defective or a wire is broken. Either of these
problems can be repaired easily.
If you receive correct readings with the meter, the
Pendant Control is okay.
c. Wiring Harness Test
The following test checks the wires leading from
the relay box connector CN8 to the 19 pin connec-
tor table socket. These wires apply low voltage to
the pendant control buttons.
1. The power cord should be plugged into the
wall socket and the main switch turned ON.
2. Disconnect the pendant control from the
base connector. All other connectors should be
connected.
3. Use a DC voltmeter 10V scale and measure
the following pins located in the 19 pin table base
connector. See figure 5-4.
NOTE
Pin 19 will have no voltage potential un-
less one of the return-to-level micro-
switches are activated, i.e. trend or tilt .
Pins 17 & 18 are not used.
Figure 5-4. Table Base Connector
Figure 5-5. Base Connector Continuity Test
5-4. Relay Box
The 120 volt power supply is directly connected to
the relay contacts. When these contacts are
closed, 120 volts is supplied to the solenoids which
are mounted on the hydraulic mini-valves. One
relay is used to supply 120V to the pump/motor and
is always activated no matter what control function
is selected. The brake locking circuit relay is also
activated when any control function other than
BRAKE UNLOCK is initially selected.
Also, inside the relay box is a step-down transformer
and full-wave rectifier which decreases the line volt-
age to 5.5 volts. This low voltage potential controls
the relays by the use of the hand-held pendant
control buttons. Basically the relays enable a 5.5
volt potential to control the 120 volt circuit.
The following tests will determine if the relay box is
functioning correctly.
a. Relay Box Input Connector CN4
1. Plug the power cord into the 120 VAC power
supply (wall receptacle) and turn the main switch
ON. Leave all connectors connected.
d. Test Results:
If you do not receive the correct voltage reading,
the wiring or connector pins may be faulty. Discon-
nect connector CN8 from the relay box and using
an ohmmeter, test the continuity between the corre-
sponding pins in connectors CN8 and the table base
connector. See figure 5-5. If the correct readings are
obtained, this part of the circuit is okay.