XOCECO LET2751, Service Manual

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2
characteristics are often passed unnoticed by a visual inspection and the X-RAY RADIATION protection
afforded by them cannot necessarily be obtained by using replacement components rated for higher
wattage, etc. Replacement parts which have these special safety characteristics are identified in this
manual and its supplement electrical components having such features are shaded on the schematic
diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same characteristics as specified in the parts list
may create shock, fire, X-RAY RADIATION or other hazards.
2 Alignment items and procedure
The alignment flow chart (see below figure).
3 TEST EQUIPMENT
3.1 AUDIO VOLTAMETER
EEPROM copy
B+ check
Field breadth
and field line
RF AGC adjust
Audio check
Focus adjust and aging
VG
2
adjust
White balance and sub-bright
H-field and center
field and field breadth
Leave factory state setup
OSD center position
Foucs fine adjust
check
High-handed
Filament voltage
X-ray protect
Picture and audio
Sub-brightness
White balance
Color pure and assemble
AV (S.DVD)
The button check
Remote control check
Assemble check
Safety check