Service Adjustment Notes; Focus Adjustment - Philips 27G7 Service Manual

G7 CHASSIS SERVICE ADJUSTMENTS
REQUIRED TOOLS FOR SERVICING
Isolation Transformer
Multimeter
Oscilloscope
High Voltage (100:1) Oscilloscope Probe
Sencore VG91 Universal Video Generator
Caution: The G7 chassis incorporates a "hot" ground system. Always use a separate isolation
transformer when applying power to the exposed chassis.

Service Adjustment Notes

Unless Otherwise Specified:
1. All service adjustments are "hot" voltagewise. For maximum safety, ensure the use of properly insulated
tools.
2. Refer to the G7 Main Chassis Printed Circuit Board for location of test points and adjustable components.
3. Grid Locations (Ex.: D-2) next to the reference numbers for components refer to the Main Chassis Printed
Circuit Board.

Focus Adjustment

1. Tune the set to a local or cable station.
2. Adjust the Focus Control (located on the upper part of the flyback transformer) for best picture details at
high light conditions.
Degaussing the Television
1. Position the television so that the screen faces the direction it will be facing when in use.
2. Ensure the television is turned off.
3. Move a degaussing coil in a circular motion slowly around the sides and front of the television.
4. Withdraw the degaussing coil at least six feet from the television before disconnecting it from its power
source.
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