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A10 PTV ADJUSTMENTS
MANUAL 7615
Service Modes and Error Messages
The following topics are covered:
•
Test points
•
Service Modes
•
Error code buffer and error codes
•
The "blinking LED" procedure
•
Trouble shooting tips
•
Customer Service Mode
Measurements should be performed under the following conditions:
Video: color bar signal
Audio: 3kHz left, 1kHz right
Note: The measurements at the following test points were taken using a 100:1 probe:
•
I142, LSB Panel
•
I220, LSB Panel
Service Default Mode (SDM)
Introduction
The Service Default Mode (SDM) is a technical aid for the service technician. The Service Default Mode
(SDM) establishes fixed, repeatable settings of customer controls, which allow consistent measurements
to be made. The SDM also initiates the blinking LED procedure and, if necessary, overrides the 5V
protection. This mode also allows the operating hours of the set, the software version, and error codes to
be read.
The SDM places the set in the following pre-defined conditions:
•
Tuning frequency set to Channel 3.
•
Volume level set to 25% (of the maximum volume level).
•
Other picture and sound settings set to 50% (mid-range).
The following functions are turned off in SDM (and after leaving SDM):
•
Timer
•
Sleep timer
The following functions are disabled during SDM (and enabled after leaving SDM):
•
Parental lock
All other controls operate normally.
7615 Adjustments page 1
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