Grass Valley 8990ARC v.1.0 - Manual (Page 25)

8990ARC Instruction Manual 19
Service
Service
The 8990ARC Digital to Analog Converter modules make extensive use of
surface-mount technology and programmed parts to achieve compact size
and adherence to demanding technical specifications. Circuit modules
should not be serviced in the field unless otherwise directed by Customer
Service.
If your module is not operating correctly, proceed as follows:
■ Check frame and module power and signal present LEDs.
■ Verify power at the voltage tespoints (see Figure 14 ) and check Fuse F1
if no voltage is detected.
■ Check for presence and quality of input signals.
■ Verify that source equipment is operating correctly.
■ Check cable connections.
■ Check output connections for correct I/O mapping (correct input con-
nector is used for the corresponding channel output).
Refer to Figure 4 for the location of PWR LED and Table 2 on page 6 for
proper LED indications.
If the module is still not operating correctly, replace it with a known good
spare and return the faulty module to a designated Grass Valley repair
depot. Call your Grass Valley representative for depot location.
Figure 13. Refer to Contacting Grass Valley Group at the front of this
document for the Grass Valley Customer Service Information number.
Figure 14. Fuse and Voltage Testpoint Locations
8036_08
Fuse: 2 A FAST
125 V
F1
JP1
pin 3, +3 V
pin 5, -5 V
JP1
Voltage Testpoints
GND