Gt65 Main Pcb - AMSTRAD CPC664 Service Manual

GT65 MAIN PCB
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GT65
ALIGNMENT
INSTRUCTIONS
STEP
FUNCTION SIGNAL
IN
SIGNAL OUT METHOD
REMARKS
1.
5V
Adjustment. Monitor Switched
on. A.V.O.
across C519.
Adjust
VR501
to obtain 5V.
2.
12V
Adjustment. Monitor switched
on. Emitter
of
Q502
&
Earth.
Adjust
VR502
to obtain 12V.
3. H.
Hold. Monitor switched
on.
Monitor Screen. Connect Frequency Counter
to
CRT
Heater.
Adjust
L703
to
obtain
15625Hz
on Frequency
Counter.
4. V.
Size
&
Linearity.
Page Program
for
Graphics.
Monitor Screen.
Top
of
the page can be adjusted
with
VR703
and
Bottom
of the
page can be
adjusted
with
VR702.
The
adjustments are
Linearity
&
V.
Size
respectively.
5.
Centering Adjustment. Program Border-
26.
Monitor Screen.
Adjust the
magnet on
the back
of
the neck
to
centre the
border.
24