Specifications

CA10 Course Notes
Sharp Electronics (UK) Limited
CE Technical Support GroupPage 46
Power supply voltage line resistances to earth
Some times it is necessary to ensure that the supply lines are not loading the power supply unnecessarily.
To this end it is useful to have an approximate static resistance of each supply. Typical readings are
shown below.
Measured Voltage Measuring Point Resistance Pin of T701
+18.1V Cathode of D718 =>1k 8
-18.0V Anode of D719 =>1k 3
+149.7V Cathode of D720 =>50k 4
+10.2V Cathode of D721 =>5k 5
+7.1V Cathode of D722 =>450R 1
8.0V Output of IC706 =>5k -
5.0V Emitter of Q706 1.25k -
5.0V Emitter of Q707 800R -
Service Set Up Mode
To enable the engineer to correctly set up and adjust this chassis, it is possible to enter the service mode
as described below.
Access and operation
To access the service mode
1. Turn the mains supply off.
2. Press the volume down and channel up button simultaneously.
3. Turn the mains supply on while still holding down the two buttons.
4. Keep the two buttons pressed until the picture appears.
5. Release the two buttons and the receiver is now in the service mode.
Adjustments
Adjustments are made using the channel up and down buttons to choose the adjustment to be made and
then the volume buttons to change the value.
To store the adjustment, press the standby button.
Vertical adjustments
Vertical slope Horizontal shift
S correction ( 59 and 66cm versions only ) East/west parabola ( 59 and 66cm versions only )
Vertical shift East/west width ( 59 and 66cm versions only )
Vertical amplitude East/west trapezoid ( 59 and 66cm versions only )
Line
East/west width ( 59 and 66cm versions only )
East/west corner ( 59 and 66cm versions only )