Test Points - VWR Mega Star 600R Service Manual

Test Points

Test Point
Mains input
XN1
Motor
XM1, XM2, XM3
Brake resistor
X6
Over temperature
cut-out motor
XM4
Lid latch micro switches
X10
Lid latch stepper motor
X9
Unit Value
230V / 120V
XM1-XM2 4.1 Ω
XM1-XM3 4.1 Ω
XM2-XM3 4.1 Ω
120 Ω
15 VDC
0 VDC
open
short
Pin 1+4
0 VDC
2.5 VDC
Pin 1+4
short
open
Pin 2+3
5 VDC
0 VDC Stepper motor moves into zero state after lid has
Pin 2+3
open
short Stepper motor moves into zero state after lid has
Pin 5+6
0 VDC
2.5 VDC
Pin 5+6
short
open
Pin 1-2 46 Ω
Pin 3-4 46 Ω
Conditions
CAUTION! Mains potential!
Mains cable connected, power switch ON
Ambient at 20°C, plugs disconnected from
main board.
Any phase to ground must have an infinite
resistance.
Ambient at 20°C, cables disconnected from
main board
Cables connected, power ON
Failure
Good
Cables disconnected, power OFF
Failure
Good
Cables connected, power ON
Lid closed
Lid open
Cables disconnected, power OFF
Lid closed
Lid open
Cables connected, power ON
Standby
been opened
Cables disconnected, power OFF
Standby
been opened
Cables connected, power ON
Lid closed
Lid open
Cables disconnected, power OFF
Lid closed
Lid open
Ambient at 20°C, plug disconnected from
main board
SERVICE 2-13