Epson RC420, Manual

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Maintenance 7. DPB (Drive Power Board)
130 RC420 Rev.9
Connector No. Function
X306, X307
The connector to output the AC200V to the Switching Power
Supply.
X308 The connector to output to the discharging resistor.
X309 The connector for the SSR (Solid State Relay) Control Signal.
X310
The connector to input the +5 V and +12 V from the Switching
Power Supply module.
X311
The connector to input the +24V from the Switching Power Supply
module.
X315 The connector to input the +5 V and +12 V to the HDD and FDD.
7.2 Adjusting Encoder Voltage
You may adjust the Encoder Power Supply voltage using a control, VR1 as follows:
(1) Turn ON the Controller to boot the controller software while pressing the Emergency
Stop switch. Make sure that the encoder power is being supplied by checking LED1
on the Manipulator’s relay board. (The LED must be ON.)
(2) Measure the voltage between the e5V and the GND pin on the Encoder
Signal connector of the longest motor cable in the Manipulator. (As for which pins
to use, refer to the Manipulator manual.)
If the encoder voltage is not within the range of 4.9 V to 5.2 V, adjust it as follows:
(3) The VR1 control used to adjust the Encoder voltage can be accessed from the rear
panel of the Controller, as shown below.
VR1
(4) If the measured voltage is lower than 4.9 V, turn VR1 in the “+” direction by 1/2 turn
to increase the voltage. If the measured voltage is higher than 5.2V, turn VR1 in the
“
-
” direction by 1/2 turn to lower the voltage.
(5) Repeat step (2) to ensure that the voltage is between 4.9 V and 5.2 V.
(6) If necessary, repeat steps (4) and (5) until the voltage is within the range of 4.9 V to
5.2 V.