Goldstar OS-7020 Service Manual page 25

Power Supply System
*
NOTE Before you start operation, see the adjustment
locations in the pullout pages.
\control setting\
Preset the controls as given in the preliminary control
setting.
(D
Check low voltage supply, if necessary.
a. Connect the digital voltmeter(DVM) between the +12V line
(P810-4) and ground.
; +11.7 to +lL.JV
b. Connect the DVM between the -lLV Line(P810 -L) and ground.
; -lL.J to -11.?V
c. Connect the DVM between the +5V line(P810 -3) and ground.
; +4.a to 5.LV
d. Connect the DVM between the +51V line(P810 -5) and ground.
; +50.5 to 51.5V
i) Conect THE PROB(l0xl) with X+(R674) and X-(R663) on
the horizontal board.
li) Set O'SCOPE VOLT/DIV to 5V. RANGE and also, the lines
of wave form of CHl and CHL must be coincided with
Ref Line.
NOTE; Ref to figure as following.
ili) Set the H-POSITION to the left side.
iv) Adjust VR805 as following
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