Philips 27G7 Service Manual page 24

G7 SERVICE MODES
Introduction
1. There are three service modes used in the G7 chassis. They are:
a. SAM - Service Alignment Mode
b. SDM - Service Default Mode
c. CSM - Customer Service Mode
2. The Service Alignment Mode corresponds to the older "Service Mode". The SAM allows
adjustments/alignments, setting of options, writing defaults to the memory IC, and erasing error codes.
This mode also displays the Run Timer, the Software Version, and current option settings.
3. The Service Default Mode is a technical aid for the service technician. It establishes a fixed, repeatable
setting of controls to allow measurements to be made. On screen display is kept at a minimum to reduce
the cluttering of wave forms with unwanted information.
4. The Customer Service Mode shows error codes and information on the TV operation settings. The servicer
can instruct the customer to enter CSM by telephone and read off the information displayed. This helps the
servicer to diagnose problems and failures in the TV set before making a service call.
5. Each of these Service Modes displays their acronym (SAM, SDM, or CSM) in the upper right hand corner
of the screen when they are active.
6. It will be memorized in the NVM that the TV set is in SDM or SAM. This is necessary because the TV must
show up in SDM or SAM again after an ac power interrupt.
7. When the television is in SAM or SDM, all normal features (such as volume control and direct channel
access) are available.
Service unfriendly modes
In the service modes, a number of modes/features are ignored since they interfere with diagnosing or repairing
a set. These are "service unfriendly modes."
"Ignoring" means that the event that is triggered is not executed; the setting remains unchanged (Example:
Timer OFF: 8:00 PM; the set will not switch OFF in service mode at 8:00PM, but the setting will remain).
The service unfriendly modes are:
• Timer
• Sleep timer
• Hospitality mode
• Auto switch off (when there is no video signal identified)
• Smart lock or blocking by V-chip
• Skipped Channels
• Closed Captioning