Commodore 1702 Service Manual download pdf (Page 15)

"R65D,C651

1hp'4

'n!s~s

tClttce

unci

condehser

C6~2

,.--

"R(,!)!

,R6S2

Bias

l'eSisto.hCe.

·open: sound levei

becc

lY\es

i'jh

R6IS

n!Si~l1lnce

C6~D

Noise ab-;orb

·shot"t

:hO

SOUI\Q

.----

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.

•

shari

.c?~n

souhd

ColO

---r

Couriil\l

cohd~sel'"

'opel"' :

')ound

T602

......

Audio

ou~~-t

tT"(lhsf.

·open:

sound

"Rbi

------,

BillS

Y~stl1l\ce

·o~:

1"\0

Sl!l.Incl

1)601

---,

L.Ft

diode

·open: sound

!eve

becomes

low

R607

ISOK

C609

.015

200V

C60S

.OI5MY

\C610

..--;---;-""Arr--;

i--+---+-----"W'r-i

. 4

7150

8 P

R617

470K

R615

47K..l.-

~606

.018MY

R603

~R61a

iaOK

R6J2

2.2K

RG04

IC601

HAIII07l

AUDIO

"R6D2,

R604

R608

220K

R609

6.8K

X601-

R610

........

560

"='"

GC:-

4000A

--1

(M.\8 FR6011

(00

112FRI

t +

l C613 .

14.711601

R61'T.

Rbl8

---,

Outfl4t

voH-C\~e

di"idih~

rec;istc~hce

101l6~

81 IIOV

,...---

c6ob~-

....

R603,C60S"

Filter

"Dc.

'Input

condense.r

CbI4.C6IS

-------"1

Noise

absorb

To,,~

~uQ.lj

c.orrection

. short:

Y\.O

SCUtlQ

'R603

cpen

:no

sound

·R{,o2

open:sound

level

becomes

hi~.

does

hot function.

'RbD4

(lpen:

sound

Ie.

vel

becomes

. (;614

short:

soul'\d

level becomes

hiljh.

does

hot

fundio/\.

bll,;

~rt:

sound

ic.;

not

Cl",dible

unless

"turned

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

·open

1\0 $Qohd

·short

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

com-

ponent values and identification.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 52 53

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