Diagnostic Leds; Figure 47 Checking Power Supply - Vaisala PR-23 Series User Manual

Yes
+24 V
OK?
No
No
Mains
OK?
Yes
Disconnect +24 V from
motherboard PR-10600
No
+24 V
OK?
Yes
Reconnect +24 V to
Motherboard PR-10600;
Disconnect processor card
PR-10500 cable,
Remove H1 interface card
PR-10701 and (optional
extension card PR-108xx)
No
+24 V
OK?
Yes
Reconnect Processor card
PR-10500
No
+24 V
OK?
Yes
Reconnect H1 interface
card PR-10701
No
+24 V
OK?
Yes
Reconnect optional extension
card PR-108xx
No
+24 V
OK?
Yes
Figure 47 Checking power supply
9.1.2 Diagnostic LEDs
Figure 44 (page 86)
Power supply OK
Have it fixed
Power supply
module bad
Measure the voltage
directly from the power
module leads (red & black)
Motherboard
PR-10600 bad
Disconnect
keyboard,
display cable and
backlight cable
H1 interface card
PR-10701 bad
Extension card
PR-108xx bad
Power supply OK
and Figure 45 (page 87)
Important safety considerations
- Always switch off the mains before
disconnecting or reconnecting
cables, modules, and similar
- Beware of the high voltage
terminals 34 and 35
Measuring instructions
- Use a DMM (Digital Multimeter) to
measure the voltage
- Measure the +24 V from terminals
41+/42- (except when otherwise
indicated)
- The +24 V DC supply is OK if the
voltage is above 21 V
No
Processor card
+24 V
PR-10500 bad
OK?
Yes
Front panel bad
assist in locating the diagnostic LEDs.
Chapter 9 – Troubleshooting
89