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LCoS Adjustments
The following topics are covered:
•
Test Points
•
Service Modes
•
Error Code Buffer and Error Codes
•
Blinking LED Procedure
•
Lamp Replacement Procedure
•
Light Engine Replace Procedure
•
Light Engine Focus and Alignment
Waveform Test Points
The LCoS chassis is equipped with waveform test points shown on the schematic diagrams.
To access these waveforms, click on the SCOPE SIGNALS icon in the Force 32 toolbar. From the
pop-up window double click on the desired waveform. The waveform window is expandable for best
viewing.
Measurements should be performed under the following conditions:
Video: Color bar signal
Audio: 3kHz left, 1kHz right
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.
The following functions are turned OFF while in SDM:
•
Timer
•
Sleep timer
The following functions are disabled during SDM (and enabled after leaving SDM):
•
Parental lock
•
Blue mute
•
Hospitality Mode
•
No-ident Timer (normally the set is automatically switched off when no video signal (IDENT) is
received for 15 minutes).
All other controls operate normally.
Entering Service Default Mode (SDM)
To enter the Service Default Mode, press the following key sequence on the remote control transmitter:
0-6-2-5-9-6-MENU
Do not allow the display to time out between entries while keying the sequence.
Upon entry into the Service Default Mode, the letters "SDM" will be displayed at the upper right corner of
the screen.
Special SDM functions
(Manual 7643)
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