Chapter 5---Troubleshooting
Model 330, 340SC, and 370SC Service Manual
5-4
STB +5volts or +24volts are still not present after verifying that the circuit
breaker is on and the projector is plugged in, the System Power Supply
may be defective.
NOTE:
Only the +5 volts LED is lit on the Backplane Status Indicator
panel (see Figure 2-2) when A/C power is applied. When the projector is
directed to Power-On the +24volts standby LED should light and fans
should be running.
2.
If STB +5volts and +24volts are present, the SCB is the most likely
cause of the problem.
Second Set
The second (2
nd
) set of operations only complete if no errors occur. If an error is
detected, the code corresponding to the failed operation is displayed, and remains
on the LED until the circuit breaker is cycled or another user “Power-On”
command is issued. These errors are far more likely to occur than those of the first
set.
Table 5-2
Codes for Second Set of Operations (User "Power-On")
Code
Description
F
“Lamp On” not detected.
E
SCB defective.
B
Low Voltage Power Supply output not detected.
9
SCB defective.
8
SCB defective.
7
SCB or RTG defective.
6
SCB defective.
5
SCB defective.
4
Any PCB in the Card Cage could be defective.
3
SCB defective.
2
SCB defective.
1
SCB defective.
0
All systems okay; start-up is finished. LED stays at 0 unless
the SCB receives an error signal that is listed in Table 5.1.
