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TEST EQUIPMENT
1.Colour Bar/Dot/Cross Hatch 5.High Voltage Meter
2.Oscilloscope 6. Ampere Meter (0.5 Class,DC 3mA Max.)
3.Vacuum Tube Voltmeter 7. Demagnetizing Coil
4. Volt Ohumeter 8. Closed Caption Encoder
9. High Pot Tester
1. B+ADJUSTMENT
1. Connet a digital voltmeter to B+ and Ground.
2. Set Brightness Contrest to minimum.
3. Adjust Screen Volume on FBT until the picture can just been seen.
4.Adjust VR901 to obtain a reading of 110+0.5V From 21”,107V+0.5V From 14”.
ALIGNMENT STEP
1.Press the SERVICE button of the remote control to enter into the SERVICE MODE.
Press the numberic button 0-6 to enter into the SER VCJ 0-6 MENU.
2.Press
button to select relevant item.
m.
3.Press
button to change the DATA.
A.
4.Press the MENU button of the remote ocntrol to guit the SERVICE MODE.
Remaks:
Press the picture PP button of the remote control to set the picture to “STANDARD”.
||. VIF ALIGNMENT(IFFS)
1. Enter into the SEVICE MODE SER. select VIF FREQ.
2. Press the
button to obtain a correct DATA.
A.
|||. AGC ALIGNMENT (TOP)
1. Receive monoscope patten at CH 69 and the input signal is 62+3dB.
2. Connect a digital voltmeter between the TUNER AGC Terminal and ground.
3. Enter into the SEVICE MODE and select RF. AGC. ADJ.
4.Press
button to adjust to the maximum value’00’.
5.And then adjust the value until the voltage drop down > 0.4v.
Remark: a/. The drop down voltage should be more than and tends to 0.4v.
b/. No observable noise can be seen.
IV.
VERTICAL ALIGNMENT
1. Receive monoscope patten.
2. Enter into the SERVICE MODE SER VCJ.0 and select the following items V.SHIFT.V.SIZE.V.SCORR.
V.LIN
3 .Adjust the value of the above items to obtain a normal picture.
V. HORIZONTAL ALIGNMENT
1. Receive monoscope patten
2. Enter into the SERVICE MODE and select the SER VCJ.0 H.PHASE item.
3. Adjust the Value to obtain the picture at 2mm.
