AMSTRAD CPC664 - Gt65 Main Pcb

GT65 MAIN PCB
IP090V1
IOSHS
S
?1
POWER
P.C. BOARD
G*ISfl
ffOOS
s
Q.
oce cm
,0:
i
^t^2
'
??
\
'-
-6
i
I
•
go
.,«
I
\
-1
1
eosl"
1
Sj*
k 4
W>«5
H}TWj
HtOC VOX
I0S3I
;
To'
Tosdo''
1
Z«0
gg3
-cy^v=jcs-
>2
WSJ"
'gpjo
M70C
*
*
S
I
'SO
S3
65S2S
*°°
^
I
®r
;
v
0CZ»»/W
•
—
«*^- »
;g$=CS
P5Sf_
HECO 470-0 1-630
SS*
- gj/g
v
ZtiSUA
rt >n M/
1'jli
Rt5k
omo
—
'
•
-,
-
a
«-»^
Yv—
c
4
s
l> 0L0
o
«
•O
Se
a
i
S^L_
8-*
<«r
lUO^S*-
©/0-0
8/ZOS^
i&3
_
4-
•—'
c\i
ri
V
jo
<d
\
VUD3
iyo
o/
eozeorf
oi
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