lem is in the Standoff Control (SC10) or the ribbon cable. Refer to Section 5, Customer/Operator Service, in the Standoff Control Instruction Manual.
If the Standoff Control (SC10) isn’t used or the Power Supply didn’t start with the ribbon cable disconnected, there are two approaches you can take. Either dis- connect the remote and see if the Power Supply will start without it or check if the start signal is getting to the Remote Control (RC6010). To check the Power Supply, remove the remote connector at J15 and con- nect a jumper
To check for start to the Remote Control (RC6010), open the Remote Control cover and see if indicator D103 comes ON. If so, problem is in Remote control (RC6010) or the remote cable. If indicator D103 is OFF, remove J29 (or the CNC start connections to J6) and jumper
M. Switching Control Check (Q1)
To produce DC output, the main switch (Q1) must be turned on and off rapidly. Power Supply output is controlled by the
If no DC voltage is detected within 75 ms at
Switching Transistor | Transistor/Coil |
Bracket | |
Q1 |
|
Large Blue | |
Capacitors |
|
Q1 Location
To check for a defective Q1, first disconnect J27 from the Driver PC Board.
Rear of Front Panel
Driver PC Board
Driver PC Board Location
On a X1 or X10 scale or with a digital meter set for diode, measure between “C” (collector) terminal, wire #83, and “E” (emitter) terminal, wire #84. Reverse the meter leads and measure again. It is normal to measure an open (high reading) one way and a lower reading the other. A low or zero measurement both ways means the Q1 is shorted and must be replaced.
If correct, measure from the “B” (base) terminal, wire #82, to “E” (emitter) terminal, wire #84. Normal read- ing is from about 50 to 150 ohms (digital meter on ohms not diode scale) a short (zero ohms) or an open indicates a defective Q1.
NOTE
If the Switching Control Q1 has failed, the Driver PC Board must also be replaced. Refer to Section 6.08, Item #2, for replacement parts.
Manual | 27 | SERVICE TROUBLESHOOTING |