Commodore 1701 - CONTROL

R04tRO~
Colo.,. contT'ol
'Ro~ 'fen: COLOR VR
does not
functlon.
Rot.R02 . R03
Tint c.chhol
'ROI open} . L.~_
I • red IJ<;YJIY\4t s
'ROl!fen . ,,"Q~entct
ROb. RO'7.KD&
Cmb-a.st CDhtrcl
'Ro'! open ;VR does hot
functiol\ when
c.ontrast is
stT'O~
RO'i.RIO _.----,
BI'!eaer 'rl!~istlln(e
'RO~ 'fen: no raster
·RIO epe" : scree", becomes
abnOT"lhllily
bT'i~ht.
-RII.RIZ.RI3 ----,
B"r i':}ht c..Jntto\
• RII opel\:screen beCDmes
s\;~htly do;rk.
'R13 open :BRICX:HT VR
does not
func.tion.
;~:~~~~=i<C~O~L~O~R~):~~~C~O~N~T~) ~~~~.~r-~--~-- __ ~ 3
~~~ ~ RC4 \ ROa R09 ~~K / ('-V-CL-U-M-E)
IOK8 5.6K 470
(8RIGHT)
3
RI6
CONTROL
RK- ,RIS" ----------.
V. Hol<l control
. Rlf ore" : when 1/. HOLD VR is
turned to ""'(lX, vert\cal
oscillatio n beco/lll$
minimlAIn (approl(. 3cm)
Rib. R2~ -----,
H. Posit;Oh cllrltrol
I ~ "'-R03
R02 IOK8
RI2
IOK8
Rt4
6.8K
5008
l'-~H
·Rlb Q)open: f~L4ltl
hoYizDr 10.1 sy'f\c.
B2K (TI N r )
(V . HOLD)
R23
1.51<
1l
I ,
R2: 4.7K Ria
~
ISU88R I GHTI 1.8K
RI9
::~ ____________________ ~/~ ________ -+ __ 2_._2_K~
RZO
470
12V
.GE-4000A
I
I
I
,
R21
2.:"1(
CONTROL:J
CB
'.
A'SSY .
~ :
L __
R22. 'K23 - ..... 1-.....
Su.b byi<j.hl: c:.onhol
R23~:no raster
- R\~.Rlq, R20.R2\ ---'-....,
Bleeder 're<>istarlce
• F: \~ ope;,} screen bec.omes
. P.l'1 open ;sli~htll da.rk.
'R20 o~n : coloy is faint.
·R2.1 0Fn.: screen becomeS
sli~.htl)' bri~ht.
CIRCUIT NOTES
Although specifically written on the
1701 monitor. most circuit theories
apply
to the 1702 also. Refer to the
1702 achematic for differences in com-
ponent values
and identification.
13