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Chapter 5---Troubleshooting
5-3 Model 330, 340SC, and 370SC Service Manual
LED On-Screen Text Description
x
Problem with decoder module data.
y
Problem with decode input.
#
Loss of horizontal sweep detected.
Codes indicating a software bug—system should keep running.
G
Internal error code not recognized.
H
Incoming command not recognized.
J
Internal password control code bad.
K
DAC reference not recognized.
L
Timer table reference not valid.
M
IIC reference not recognized.
N
RTG reference not recognized.
P
Internal convergence axis reference invalid.
Q
Internal channel parameter reference not recognized.
R
Internal convergence data index invalid.
5.2 Power-On Codes
The projector performs a series of operations when power is turned on. Codes for
these operations are shown on a LED display at the rear of the projector.
Operations are divided into two (2) sets:
1. The first (1
st
) set occurs when standby power is applied. For example, the
projector is plugged into a proper outlet and the circuit breaker on the side
of the projector is ON.
2. The second (2
nd
) set takes place when the user issues a “power-on”
command. For example, presses “Control-P” on a VT-100 terminal or
“POWER ON” on the I/R or tethered remote.
First Set
The first (1st) set of operations occurs when the +5volts is activated to the SCB
prior to applying power to the projector (standby mode). After the +5volts is
applied, the LED should display a zero or #—if not displayed, there is a problem
with the SCB.
Verify the following conditions:
1.
Verify that +5volts and +24volts standby LEDs are lit. If STB +5volts and
+24volts are not present, verify that the projector is plugged into a proper
outlet and that the circuit breaker on the right side of the projector is on. If