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4-3. When R 1 is not open
._ J
Find the cause according to the procedure shown in below.
Flowchart.
(~
_ _ S,ta_rt _ _ )
~
G)
: 1'-,,'
Wavetorm_does __
Wav.eform
: nbtappear..
i.]; '-'
1-:'
appear,s.:-:
" ,
"
·.l,i~',_n ;@J:
_ . .
~-<
:'j
;:-,J
"WaJef~~rnLcippears at
,
" , .. , .tHe ,beginning,;;: but I ..
j,~~';
,disappears~soofr. 'i;
I
',,;_'
: .Gradua'lIy,,_
incre~se
_
the,
.... "
.~C;:
voltage
using:vol~age
.' . ....:: "regtil<ttprSlid"cand en;
_ sure"
app~ara.nc;:e-
of
.th~,
.......
.;wavef~rmlhqW~)nFig.2:
J
f
o
' )
',o'_,'"'
~I
. ';':'
'I:,
' , ; ' ; :
f':~;~?~~~J~~~~vn~~~t~'
~
End
)
. "
'
. ,!,,:
phenomenon and
other~
ing range.
Voltage range:
Time range:
50V/div
10us/div
@TheWaVefQ.r.mb.elow.willappear
in this case lAC JOOV).
i';;
~J.-,
,.; "',iI'.".
"'"'-'-W"" ..
r.;.;..;.'.··'
• . . • . . . .
. v,,::.\
20,,3
(Fig3)
Qutpotvoltage will bel to 1.5V
(+5\1
output).
@ When the AC voltage is increased
by means of the: Slidac, the wave-
~orm appears at:the :beginning, but
it
disappears ' _ " aMd ; becomes
DC
;
1,<1'
:
yoltage
,when the AC voltage is
further;'lncreased~
'-i'
I , -r:~~J ~}?'~~W:i,~g; CO,~~-Qf1~ot-
may be in
failure.
.04 •. 05.
D6,
Qa
*08 and, Q5".'may rarely_ be in faiiure .
"1'
,'",
. The following component may be in
, failure.
03, 1D6/Q4,05,
T2,
R
11,
R20
- ,
;',
*Rl t;'R20, and 05 :may' rarely
be
in
failure.
, , i '
'-'j
.,.,'"
NOTE:
RVl may possibly be in failure, in the output voltage does not reach the given rating (4V).
~,,6-
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