Grass Valley 8901 - Manual (Page 29)

8901/8902/8906 Instruction Manual 29
Service
Service
The 8900 Analog Video DA 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 ser-
viced in the field unless directed otherwise by Customer Service.
If your module is not operating correctly, proceed as follows:
• Check frame and module power LEDs.
• Verify power at the voltage testpoints (see Figure 15 ) and check fuses if
no voltage is detected.
• Check for presence and quality of input signals.
• Verify that source equipment is operating correctly.
• Check cable connections.
Refer to Figure 7 on page 16 for the location of PWR LED and Table 4 on
page 16 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.
Refer to the Contacting Grass Valley at the front of this document for the
Grass Valley Customer Service Information number.
Figure 15. 8900 DA Fuse and Voltage Testpoint Locations
J1
F2
F1
F2A 125V
F2A 125V
8271_07
GRASS VALLEY 8901 ANALOG VIDEO DA
8902
8906
J1
Voltages
1
2
Fuses: 2 A Slow
125 V
+12V
+5V
–12V
–5V
GND