Grass Valley 8937 v.1.1.0 - Manual (Page 42)

42 8937/8937D — Instruction Manual
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 21 ) 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 on page 17 for the location of the PWR LED and Table 2
on page 18 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 on page 4 at the front of this document
for the Grass Valley Customer Service Information number.
Figure 21. 8937 and 8937D Fuse and Voltage Testpoint Locations
GRASS VALLEY 8937D SDI/ASI RECLOCKING EQ SNMP DA 8937
F1
2AMP
125V
FAST
8270_08
FAUL
T
COMM
CONF
PWR
SIG PRES
BYP
ASS
143Mb
177Mb
260Mb
360Mb
REM OVR
J8
Voltage
Test Points
2
+5V
GND
Fuse