Commodore 1701 - AUDIO CIRCUIT

"R65D,C651
1hp'4 to 'n!s~s tClttce
unci condehser
C6~2
,.-- "R(,!)! ,R6S2
Bias l'eSisto.hCe.
·open: sound levei
becc lY\es h i'jh
F
R6IS
-
~ n!Si~l1lnce ~
C6~D
Noise ab-;orb
·shot"t :hO SOUI\Q
I
-
I
.---- R607, C60q ----,
N~t;ve teed ha.ck 'resistClhce
(.612.
DC c.u.t cOhde.I'ISIt.'f"
. open: sound level becomes
hi~h
Boc~;, conde.nser
~6DS',c608
Coupli~ TeSls~n~
and cOhdenser'
'F-bOS" O~}
·c.oo& open :no sound.
• II shari
.c?~n : no souhd
ColO ---r
Couriil\l cohd~sel'"
'opel"' : no ')ound
T602 -- ......
Audio ou~~-t tT"(lhsf.
·open: no sound
"Rbi 1 ------,
BillS Y~stl1l\ce
·o~: 1"\0 Sl!l.Incl
1)601 ---,
L.Ft diode
·open: sound !eve I
becomes low
R607
ISOK
\
C609
.015 200V MY
-
C60S
.OI5MY
\C610
..--;---;-""Arr--; i--+---+-----"W'r-i . 4 7150 8 P
R617
470K
R615
47K..l.-
~606
.018MY
R603
~ 68
~
~R61a
1" iaOK
R6J2 ~
2.2K
RG04
IK
\
IC601 HAIII07l
AUDIO
"R6D2, R604
R608
220K
R609
6.8K
(V X601-
R610
........ 560
L7 ~ "='"
-,
GC:- 4000A --1 r
(M.\8 FR6011
(J (00 I
112FRI
I
I
t +
l C613 .
14.711601
I or
R61'T. Rbl8 ---,
Outfl4t voH-C\~e
di"idih~ rec;istc~hce
.J 101l6~
fa 81 IIOV
,...--- c6ob~- ....
R603,C60S"
Filter
"Dc. 'Input condense.r
CbI4.C6IS -------"1
Noise absorb
To,,~ ~uQ.lj ty c.orrection
. short: Y\.O SCUtlQ
'R603 cpen :no sound
·R{,o2 open:sound level becomes
hi~. VR does hot function.
'RbD4 (lpen: sound Ie. vel
becomes 10 w.
. (;614 short: soul'\d level becomes
hiljh. VR does hot fundio/\.
.c bll,; ~rt: sound ic.; not Cl",dible
unless
VR is "turned at
least ho.lf way.
AUDIO CIRCUIT
XboZ .X603 -------.,
Audio out
·open:sound level becomes
low and lacks bass.
R613. R614 ---~
BOola t\c~ fesistllnc.e
• open: sound leve.l beComes
low and lacks bass
;<601----.
AudIO c!ri ve
·open ~: 1\0 $Qohd
·short 1
FR601. cbi3 ---,
FilteY'
. FF-(,o\ open: noSouM
CIRCUIT NOTES
Although specifically written on the
1701 monitor, most circuit theories
apply to the
1702 also. Refer to the
1702 schematic for differences in com-
ponent values and identification.
10