Roadstar CTV-1015, Service Manual

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GENERAL FEATURES AND ADJUSTMENTS
1. NOTE
Because this is not a hot chassis, it is not necessary to use an isolation transfromer.
However, the use of isolation transformer will help protect test instrunents.
Adjustment must be done in the correct order.
Supply AC 90-250V~ 50/60Hz, 45W, DC 12-24V , 40W in general.
Most of this chassis is designed to operate in the wide range of power supply.
Automatic degaussing
The degaussing circuit operates for about 1 secord after the power is switched on.
If you change the direction of the TV set in a state of Power-On, any color-blur may happen.
In that case, plug it off and plug it on after 1 more hour.
If color shading still persists, perform purity and convergence adjustments.
2. EEPROM(IC01) REPLACEMENT
When IC01 is replaced, all values are reset to INITAL MICRO-CONTROLLER DATA.
Because the pre-set data is reset after the replacement, above all, select factory
mode and write down all the pre-set data befote the replacement.
After the replacement, select factory mode and set the initial data referring to the
written-down data.
If you fogot to write down all the pre-set data or you can t turn on TV, re-adjust the initial
data according to the adjustment manual, follow the below procedure.
Replace the defective IC01 with a new one.
In the ON mode, Press D 1 + 1 + TV/VIDEO button
on the romote controller in sequence.
And then, factory mode will be displayed on the screen.
Input the signal like a color-bar pattern into antenna terminal, or input the current
broadcasting signal into antenna terminal.
3. WHEN CRT IS REPLACED
Do the following adjustments in the factory made.
SCREEN adjustment(SCREEN VOLTAGE)
W.BAL adjustment (R-Cut, G-Cut, R-DRV, G-DRV, B-DRV)
PICTURE adjustment (HRS(50), HRS(60), HEIGHT)
NOTE
You don t need to select 8.EEPROM Rest and 9.UOC Control.
Two items are critical to the system operation.
Press TV/VIDEO or MTS button when you want to finish the factory adjustments.
TV/VIDEO button:the early state that you bought TV sets.
MTS button:the previous state before you enter the factory mode.