Grass Valley 8935CF - Manual (Page 53)

8935CF — Instruction Manual 53
Service
Service
The 8935CF modules make extensive use of surface-mount technology and
programmed parts to achieve compact size and adherence to demanding
technical specifications. Circuit boards should not be serviced in the field
unless directed otherwise by Customer Service.
Power-Up Diagnostic Failure
If the module has not passed self-diagnostics, do not attempt to trouble-
shoot. Return the unit to Grass Valley (see
Module Repair on page 54 ).
Troubleshooting
Electronic Circuit Breaker
An electronic circuit breaker on the module works during a fault condition
or an overcurrent to cut off power to the module in place of a fuse.
If power has been cut off to module, remove the module and replace it in
the frame to reset. If the problem persists contact Grass Valley Customer
Service.
Voltage Test Points
Voltage test points for the module can be monitored from the locations
shown in
Figure 29 .
Figure 29. Voltage Test Points
8543_09
J11
+12V_SW +5V
+1.8V
GND
GND
+3.3V
Voltage Testpoints