Service manual
Table Of Contents
r---
C
402.-
VertiCllI
osc.lllcrtor
condenser
'll,pett}:OI'Ily
sit'l'jle
·shOrt horizontoJ line
r---R403.R404
---------,
r-
v40S
V~'rtic(ll
oscIIIa.tor bia.s circ.uit A
nsoYb
of
Q,
bhOYm~(
'R403 open:
only
Si~1e
horizontcll lihe.
V()1+~<je
-R.40+OP~":
when
'J
HOLD
VR
is ttlrhed.. V.
BLK
I
H.
OSC,
V.
OSC
&
V.
OUT
CIRCUIT
I
r-
R416,C40~
.
R4Ig
r--
CS'OI
---~==:::::~"'--I
b~Qck
bo.hd
""ill
a.ppeo.\"',
o.nd
scree"
.--R402.,
C40S
--.:/
_______
-,
r FR4-0i •
cA-!'?
----
.....
r--I¥.
'-
IS
___
--:
:~l~
~P:::~~Znt~o.b\liu:
.
flicmi"1
lhh!~.,.a.tin~
drcuit
R414
, h
C40g
Base
biaS
-resiSto.hce
For
1o.l<.e-off
V.
BLK
pulse
Fo\'"
pTeventin'.}
verticil! sync
s~1\Q1
.
open
: iUulty harizontai sync.
Vee..
Sl'J\Ctk''':f
·c~s
short}
:falll+-..
"
'FI~401
Of'!1\
}
••
vertieo.l
o.m~itl4de
'open
:'Jertico.l
runpi
i
tude
;-
R40i.D40
2
,C4
0
3-
1
/
(veT
tical
sy,..c
si~nlll
nice-off)
SMoot
~~
of
X40/
·R41b
open}
:flyback
Ii
he appeo.rs,
,C40Q
open
. short ! picture
is
shift
to l"i'aht.
~
C40\
:i)-402.siIotil.0hlr
si"SI~
.c40S
0rel\:when
VHGL'P
VR
is tu.rned
fu.\Iy
'R41+
of'\!'"
i
..
smo.lI.
<approx.
2
C1rl)
o.hd
stat.jhzatiol'\
/
.c4-04
open " Vtrt,cal
sr
nc
.
is
Slna.U
•
.c~3shortJh.,rizont41
ri<Jht,
it
is
possible
to
fold
b(lck
(o.~rcx.
1.J;;c1n)
/
'
R418
open:
screeh
becomes
sii~htly
bri~ht
Condenser
for
p~ven1i~
verticD.l
amplifier
oscilliti"3
'--"-T'
___
'_in_e_---'
o.t
Cl
stnctl(
alllpIitude(apprDx.
ho.lf) 1
1
1-
I,'
r
../
I r
~A"
'A
A
~A
/ I
X4
f
O©'
-81'-11~0-V~\+---/~-----~C~4~0~3~i
..
~-/iR;4;!8~~;2-i~-~c~J~0~~:y7~-41~J=2='=0=V=p=-=p==~~=~a~8=v=p=-=p=~---------~~~~~vF~R~4~
~~:w
~~
/ I
~:~
45~
100/~~R401
.033
lill
JLJL
68FR
I
WOMR
IW'OMR
_1
LC402
~+
~402
h
~
V DC
2W
";-C412
+C408
T.~1;~9100V
MY
- I I
+n'i-
1061'
=-C501
lID
~2.2/1~~
r~*
"'~ltOy4
~
~11
(v)
---a.3V
(V)
R2il~
.:c_ 3.3/160<ZlZ14.7/50 1
Iii
:!:1I.420
.001
C401
1
TANTAL + RDO"(C) / /
s-
040li
\0
112;5
~~O
~IO.I.
#
~I-
R411
22K
I +
~~b~16
~
J I
rv:?OSiTiONl
IS2473H.
~
-"
TANTAL
#
~
0405~
zt:C407
t;:-,3----~~'--tl--""=-0:-s:-0+k;~w"':'0"':'6-.A:-------·'-
___
L:
1
-+L-~~:!:':.~/2.~B~5~0~K~-~1
X402r
V
~
v
,#'#..
R405
_I"'"
1
~~~~7
R036E
l
1,3.3/50
680
-.l
..
",,+
I
~~s
C411
1
22~41~1
ri
R4!2
1
0.6V
4V
IV
\
3.6V
6.7V
I/V~~:p:
5V
!O.SV
12K
IV.LINj ,
~
"""
\
1s~;m;
47116,
'v
l~~F
100/160
'
(opnCN)
~
~
5.5K =
I 2 3 4 S 6 7 8
+~'i2
\~R471
T503!
?1--
.......
r..-----4~.!:.....--4J~_:r4--~i~----:---+I
....
•
......
-";:>'-!W!....l.<OM!Z!R!:l..-
, -
....
C406
2208
'-
-$R40a
~681/2w
SIDE
PIN
TRANS!~+-l---+I---------,::-::-:-:::+---~~---i,f------
r-L---'---'-,
I
?200
'V
(OPTION' I
--
I
R4
19
I,..,
I
v.
AMP
.1
J
V.OSC
I -=?".082MY
R410
2.2K
1/2S~\r-,-~~--t-----
R529
R403
~
R:~9~
eMF
"SInOQthil1~
c.ondenser for
DC
vclta~e
h~atjve
:>
~6.8
IW,
C401]'
--------
____
......
100
J ,d
4.7K
-
~"
. I l't
d'
I feedback
PHASE
OET
H.OSC
WAVE
FORME..,
IC50'
,--=---,
·open:vertICCl
o.lIIP
' u e IS Sinai (o.pprox. 6
em)
IV.
HEIGHTI
.short:only
Sinale
horiLonta.1 line ,
HAII244
J
16
15
14
13 12
/I
10
9
H.AFC,
.-R40S
-
.........
r-R410
________
--.
TP
-
338
12.2V
6.6V
3V
~~6
6.6~I2.SV
1
.8V
~.
°V.SOCS
C X 5 ° I I
Discha~e
resistor f::r vertical
AC
c.urrent
detection
resistor
_4.7K
R
~O
5 osc.illo.ticncondenser
-open
: only
sinjl~
horiz:onta.1
!,he
...
.-~
\¥-y.J
1
~
7.51<
0.3V
'
54
.
2\/
'open:only
Sif\~le
hcyiLcntal
lin~.
(hcriLc1na.1
lin~
is
kicks upward
• _ _ (imo.se appears
at
lOP
haif of
RS02
C508
,y
I>""
SCTl!.en
at
,nlends
of
aOc<lt
in a.bout
1.
second)
~.,."..,.
.... 6 a K
.0056
I _
//
one
sec.ond)
CS04~t'""
:~
?P
0.8Vp-p
~
/
C503
1150
+
C505
ri
,...,.-,
(~R506
..-L-R40'T
----------,
.015MY
-~....
,~3l
R
503
I I ! I I
..
560
I Resistor foY
AC
current,
~
xsol
__
--,
II.8K
I 1"1.>
I~...J
I i
\1
_ neSlltive
feed
ba.CK
---
. dy-ive
RSOI
~
1/4
CMF ?
r---'
·op~l'l:
top
haif
oniy
of
sc.reen
is
1-!01'Izchtai
TP<r-.33A
5.6K"?-
[>-R504
'-
(H)
ed
Ah}'
I --...
etCp.sSively
donso.
t
.ap'
:
no
yastet-
47K
...............
-short
no
sound
HI.
~
C506
m:
MY,
I
......
HOYizohtal
asc
i II" t;
on
e\ e""ehi-
33/161
'Y
st
r
cs
IS,
CSI'l
.
CSQi',
TS03
----.,
Fonno.tion
(rr
~YQ.bolic
wdve
(side
pit' cotnllensa.tion)
'(;SI'>
o~"
\
:cnly
s;I\Qlt vertico.ll;ne
'1'S03Snurt
J
d
·C.Slrt
~n
l.:hociz.onto.l
a.mplitu.de shrinks,
·Tso3.;V~
5
-
eSI'I
J.cd,
:t,
,
\,
po.rt
of
screen is
rnissit'lq,
~D;06
I
P-revention of capacitor d'ropout
due to
o.pplict\-tio
n
of
reverse
polo.rity
volto.~e
to
C51'1
and
C5\8
+ 1+
±\I.~?J
JH.FREQjR
3
5.
9
0
K
8
lO~5~:
OM;;-------...I_
-C~08',Rs-o:3,RS'04
I
·c!>c)~
open
:
no
n~
e
~
12.7V
0701
I no
sOIl
.....
d
R701
HZ20'V,
HA
1/244
TROUBLE
SYMPTOM
OF
PRESUME
-
X701
-
__
~I§]
~
X'lO!
-----,
X -
R.o.r
?I"tectc'r
'
@-<W
!ohortl.·f1D
TCl.ster
.@-<f)sherd·
no
sound
-eso1.
Rib
.~ZS'
~
...
tcoth
wave
phase
adjustment
-eSOt'!
cpen
(
:
Imaqe
shift
•
/I
SI'orl to
Idl
4 .
7K
"")
A~"
I~R~02
1
....
" .
R';03
H
AFC
outpllt
ihjection
resistor
"$.
+
R704
~
41.2K
iI.l.
·open :fCl.llity horizonto.l sync.
.. C701zz;:z 9531<
CS27
1/2CMF
R527
100/6
.
31
*1·1.
OOI5r11----.
"#' ? CMF *
~5C5
L..c.....
I';'
8,'}"K
1125
\ROI
I
(r::l)
.,f,.t'_
--til
)~
__
-4I>-t-+-j-----4'Vv'v-v-
.-((52'1.
CS2'7
------,
~t
..
-----.
~l~
•
--
Pulse
phase
settih'J
I
~
-RQ.'T
,)pen}:
;",o.~e
shift
~
RIJ'OI
,
R'703
.R7o4
·C52.'T
open
to
ri~ht,
SO~,Cso4,
RSo/ - r-CSOS.
RS'08
r-
C'TOI,
D'701
- '
<'5'2'7
sherI::
faulty
hori:z:onlul
HAFe output
vo\to.~e
S~wt~th
wo.tIe
~eJ1era10r
Ab"OTmo.l
B1
voltaqe
Smeothi
n~
circuit
CirCUIt
for
comparison
wave
detection
C
...
optn
·C~S.R5Dg
O"""}.
I
h'
'I
-R'1040p.!n
1.M
ro.ster
.
>O'T
l:f!1u.lty
hO~;ZDnht(
r'"
:liW.tJ
onZOIlTa
.
'~')Ol
open
5
sync.
elf
top
half. .c')os
short
~ync.
'0'101
short
no
sound
'
C504-
sl-Drl..:
fo.ulty
horizontal
\
r-D!>05
Pulse
ampiihlde
\imitter
.open
:
imo.~e
shi
ft
to
ri<jht
·short:
fa
..
lty
horizcl'\t(l1
syt'IC.
sync:.
<.
HoRIZONTAL
C1RCtIlT>
·
H.
oscillo.t;on
stop
(ho
'(a.
ste r ,
no
SO
;
Ji1'\)
· fa.uli,!
H.
SyhC
.
·
o.bhOYmo.\
H.oscillat'on
< VERTICAL
CIRCUIT)
•
V.
DSC
.
l!o.t;ol1
stop
(sil'\~le.
nOl'i:z:ontal
11he)
•
fal.llty
V.
sync.
·
fo.L.llty
V.
ampl;
tu~e
·
f~u.ltr
v.
i'heo.ri+y
,-X4CI,
D4CI,
Noli'
_...1..-
__
---,
Vertical
output
'
X401
open} .
vertieCl!
o.tnoiitude
is
,
D401
shan
: S'
1(-
- '
,
mil
,
Imo.ae
(lpi>ears
'C4Cl/
short
,
J,
r
below
center
of
CRT
_
CIRCUIT NOTES
Ahhough 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.
14