Service Adjustment Notes
Caution:
The RS Chassis incorporates a
"HOT"
ground system.
Always use a separate isolation
transformer when applying power to the ex-posed 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 RS Chassis Layout Diagram (Figure 1) for quick location of test points or service adjustment
controls.
3. Grid locations (Ex. D-2) next to control reference numbers refer to the Main Chassis Printed Circuit Board
Illustrations.
Focus
1. Tune in a local station and adjust the Focus Control (located on flyback) for best picture details at high light
condition.
RF AGC Delay
1. Tune to a weak station, or loosely couple the antenna to observe a
snowy picture.
2. Set the R.F. AGC delay (R206, J-3) to its fully clockwise (CW) position.
3. Slowly turn R206 counterclockwise (CCW) to a point slightly beyond the
point of minimum snow.
NOTE:
Do not turn the control any further as it may result in an overloaded
picture on the face of the CRT (caused by a strong station signal).
IF/AFT Alignment
1. Ensure the set is in the Antenna mode (not Cable) and tune the
receiver to a good local air signal.
2. Temporally place a jumper from pin 5 (Coincidence) of IC200 (J-2) to
ground.
3. Connect a DC voltmeter (input impedance 10 Megohm or more) to
Test Point 900 (AFT, H-2).
4. Adjust L210 (J-2) to 2.5Vdc exactly.
5. Remove the jumper from pin 5 of IC200 to ground.
Pincushion Adjustment (Models with Diode Modulator AWR006
& AWR007)
1.
Apply a crosshatch pattern to the antenna input terminal.
2.
Preset controls, R712 (Amp), R714 (Trap) and R728 (Width) to their mechanical center positions.
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