Table of Contents
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O'l
TROUBLE SHOOTING TABLE (Continued)
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NO RASTER
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1
.'es
Does RY1701 turn on?
I
No
I
.l.
Check CRT connector (KY), (H) bias.
I
Turns on, but soon turns off.
I
I
J.
I
Does 01201 (POWER LED) turn on?
I
I
Normal
I
rAbnorma~
1
Yes (RED)
Check 0850,
0851,0852,
Check IC801.
0853,0854,
0855.
01201 (POWER LED) turns on and
Does horizontal circuit momentary
off.
oscillate?
~
(Bus error)
~Yes
~NO
Clear the bus error by +5 voltage pin
Check
Check the
(16) of IC1001 first and then turning
protector circuit
power circuit
on the power. (01201 is then
and its related
consisting of
supposed to stop flashing).
parts (62) of
IC1701,IC1702,
Does 01201 turn in red?
IC1001 V
IC1703,01701
~Yes
~NO
PULSE.
etc.
Put pin (16) of
IC1001 in the
original state
Check
and see many
B
protector.
often 01201
flashes in red.
This indicates
which ICto
check up.
~
@
@
@
~
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mt
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1
;/!
l-e
1<Y1701 i!:-emiili ?
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~1!l:CRTm~fHKY),
(H)I'fl-llil13i.
miili.
{§}Jf!&P-liJIiOi.
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.l.
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IE1t
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1it
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DI201(l'\!lDJl:!U'6=m'l1f);/!-e
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mil?
;ll!:(tti:r~)
~~Q850,
~:m:
IC80l
Q86l, Q852,
Q853, Q854
1>l:Q855.
D1201 (I'\! lDJl:!t%=m'llf)l5l/ii. ,
*"l'-ji1Jt/1l'\!mli!:1!i'~I1ij~lli
?
-liJ1iOi3l:"II'.
~ (~~¥.l$lj:f'f~)
t;ll!:
t-e
fflIClOOll'fl+5Vtl!! (16)
mllk<~
~~E!3
IC1701,
~~mll'fl~~:!1t~.
l'I.\,sl'\!lJlJ{
~~f:ji!JJ"%~
IC1702, lC1703,
~ii..
(Jltil't. lJl20I.fljl.!l:.f);J;!J).
W,&!!iICIOOl
Dl701~~ft,qX:a<J
DI201:ll!1!i'
liHW,tt~
?
~*a<J§IWj:
::t%m%~o
~:ll!
~1!i'
(62) (¥1tMc19'),
IIClOOltl!!
(6)
'FJij{!lil:!1t
~.~~
D1201
.. B
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