ALIGNMENT INSTRUCTION
I. PLEASE READ BEFORE ATTEMPTING SERVICE
1. Never disconnect any leads while receiver is in operation.
2. Disconnect all power before attempting any repairs.
3. Do not short any portion of the circuit while power is on.
4. For safety reasons, all parts replaced should be identical, ( for parts and part numbers see parts list ).
5. Before alignment the set must be pre-heated for 30 minutes or more and erase magnetism thoroughly
from CRT front chassis frame by erase coil. ( Except IF, SYNC, COLOR, SECAM, B+, SOUND )
II. TEST EQUIPMENT
1. Colour Bar, Dot, Cross Hatch Generator
2. DC Power Supply
3. Oscilloscope
4. Vacuum Tube Voltmeter
III. FACTORY ADJUSTMENT : See table 1- 4
1. Press REMOTE FACTORY ON button.
2. Press REMOTE FACTORY button.
3. Press REMOTE UP or DOWN button select item.
4. Press REMOTE value (+) (-) button,adjust the value.
5. REMOTE DIALOG CENTRE button can turn off factory mode function.
REMARK : NO this factory on Normal remote control .
IV.B+ ADJUSTMENT
1. Connect a digital voltmeter between the W234 and Ground.
2. Press REMOTE Picture button.
3. Press REMOTE UP/DOWN and value (-) button set Brigntness,contrast,color to minimum.
4. Adjust Screen Volume on FBT Until the picture can just been seen
.
5. Adjust VR901 and obtain a reading of 143V +1V (DC).
V
.
AGC ALIGNMENT
1. Receive CH69 ( UHF ) and input field strength. (60dB in put signal)
2. Connect a digital voltmeter between the TUNER AGC TERMINAL and Ground.
3. Press REMOTE AGC button.
4. Press REMOTE value (+) (-) button adjust value to (0) and then adjust AGC take over value
obtain drop down 0.4V. (DC)
REMARK : ( 1/ The drop down voltage should be more than and tends to 0.4V )
( 2/ No observable noise can be seen )
6. High Voltage Meter
7. Ampere Meter ( 0.5 Class, DC 3mA Max )
8. Demagentizing Coil
9. Philips Pattern Generator
10. High Pot Tester
5. Volt Ohmmeter
SM-37PM P. 3
