Grass Valley 8937 v.1.0.0 - Manual (Page 31)

8937/8937D Instruction Manual 31
Service
Service
The 8937 and 8937D modules make extensive use of surface-mount tech-
nology 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 and signal present LEDs.
• Verify power at the voltage testpoints (see Figure 18 ) and check fuse 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 for the location of PWR LED and Table 2 on page 14 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 18. 8937 and 8937D Fuse and Voltage Testpoint Locations
GRASS VALLEY 8937D SDI RECLOCKING EQ SNMP DA 8937
F1
2AMP
125V
FAST
8270_08
FA
U
LT
COMM
C ONF
P WR
SIG PRES
BYP
ASS
143Mb
177Mb
260Mb
360Mb
R EM OVR
J8
Voltage
Test Points
2
+5V
GND
Fuse