SCP SCIENCE DigiPREP HP Service Manual

KeyPad service manual
Rev.1.1
27
5. Heater and Monostable Section
This circuit controls the heater inside all types of DigiPREP Blocks. It consists of
a Solid State Relay, a Monostable Multivibrator and protection circuit.
Monostable
Multivibrator
Solid State Relay
AC
To Heater
Vdd
R7
R7
R7
Jumper
(shorted or to
DigiSET)
from CPU
R8
C5
/Q
Q
Trigger input
Pin 12
Base
Frequency
Setting
COM2
Figure 15: Monostable and solid-state relay circuit
5.1 The DigiPREP Block is not heating up
5.1.1 DigiPREP connection verification
 Ensure that the cable between the KeyPad controller and the heating
block is correctly inserted on both sides.
 Verify that the voltage selector of the heating block is properly set.
5.1.2 COM2 dongle verification (only if available)
NOTE: When the COM2 of the KeyPad controller is not connected to a DigiSET
system, the port must be shorted with supplied DigiSET Dongle.
o Make sure that section 1 and 2 have been verified before
continuing.
o Ensure that the DigiSET dongle is fully inserted into COM2 port
(see Figure 2).
o If so, before removing the bottom plate, verify with a multimeter that
the COM2 dongle is shorted. If not, please replace the part with a
new one.
o If the dongle is ok, remove the bottom plate by removing the four
screws holding the feet in place and check if the DigiSET cable
(see figure 16 for location) is fully inserted.

SCP SCIENCE DigiPREP HP Specifications

General

Brand	SCP SCIENCE
Model	DigiPREP HP
Category	Keypad
Language	English