Samsung MZ467 Service Manual page 8

l-S) Video circuit
This circuit performs following functions.
• Video input buffer (1C501 :74LS07)
• Cascade amplifier (OS03, 0801)
• Contrast control circuit (OSOl, VRSll,
0509)
If only video signal input into the
ICS01,ICSOl delivered to cascade
ampl ifier(OS03, 080 1 )
If only intensity signal input into the ICS02,
1C502 delivered to cascade amplifier (OS03,
0801). CONTRAST CONTROL is operated
by OSOl,OS09, VRSll from a cascade video
amplifier which circuit output is applied to
cathode pin of the CRT.
1-6) CRT board
it contains video amplifier transistor 0801
and CRT socket.
1-7) Power: board
This board contain fuse.
IMPORTANT: When replacing the power
supply, make sure that the green ground
wire is properly attached to the make sure
that the fuse is of the same type and rating
as original.
7