Service Manuals, User Guides, Schematic Diagrams or docs for : BEKO TV 14.2 chassis chassis_14.2

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chassis_14.2


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1. ELECTRICAL ADJUSTMENTS

1.1. Supply Voltage Adjustment

Connect a digital voltmeter to the cathode of diode D611 at the AV1 mode of the TV and set the
screen voltage to the minimum with the screen potentiometer. Adjust the main supply voltage (B+)
with P601 potentiometer to the following value (after adjustment, readjust Screen voltage).
25"                   : 145 VDC
28"                   : 145 VDC (147 VDC for A66EAK071X11)
28" Pure Flat 16/9    : 140 VDC
28" Super Flat 16/9   : 140 VDC
29" Pure Flat         : 125 VDC
29" Super Flat        : 125 VDC
32" Pure Flat 16/9    : 140 VDC
32" Super Flat 16/9   : 131 VDC
33"                   : 158 VDC

2. SERVICE ADJUSTMENTS

You need the special service remote control to enter and exit the service menu of the TV (you can
order it from the manufacturer). All buttons of the Service RC are same with the user remote control,
only service menu In / Ot was added to it (please see the picture below).

Navigation
Service In/Out   : Enters to / exits from the Service Menu
P+ / P-          : Moves upward / downward inside the menu
V+ / V-          : Changes the value or option
Green & Red      : For screen adjustment (pls see the explanation below)
OK               : Changes the brightness, contrast values to 00, 3F and preset values sequentially (Its
                 OSD is shown). When P+ / P- buttons pressed the service menu is re shown.




2.1. AGC Adjustment

Apply a signal with amplitude 65



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