Philips PM2517E - E H T P R O B E P

79
G Check
R314 and lracks
Delecl
V301i V302
H Signai RNG B on Dl01 Hi= D101/7
Select; Funclion V-
Manual rangrng
See E
Reter to
6.5
Fanging errors
B Signal Vin2 000061
(4301)
Hi
=
a30r/15
S6lecl; Ränge 1V-
Manual
ranging
0V-
Dei€cl V302
Conlrol oi V302
Signal lout
00006l
(4301)
Hl
=
4301/11
Select;
Range
1V-
Manual ranginq
Defecl R313
Se eclor sw lch
Tracks
No
vo
lage
Fes stors Ra
and Fb
o00061
(A30r)
R307
=
Ra
R308, R3l6
=
Rb
Q meter
=3ka
=30k4
De{ect
R307
F308 or R316
L Signal AZc
000061
(4301)
ot 15!F in
paralell
lo
c30314301/6/7)
Display correct again
when measuflng
Defect C303
Tracks
Deiect 4301
6.6.2. Display will nol
become zero with
VQ/O short circuited
(Vru
lunction)
No. From
Measurement
Ny'easuring
points
Measu ring
dala
C
o rrect
lnc o
rrec
t
Ripple on
power
supply
oi 000061
(A301)
Fl
:
a30r/12l5
+85V
Selecl;
Funclion
V-,
AUT ranging
Shortcrrcuil Valo
With
oscrlloscope
<5mV
Reler
lo I
POWER
SUPPLY
6.1
B
Siqnals V
n1
and Vin2
000061
(A301)
Hi
=
4301/3
(Vrnl)
Hi=4301/15
(Vin2)
S€lect; Funclion V-
AUT ranging
Shodcircuit VQ/o
< 1C, nV
Both
signals
should
be
Relef
(o
D Refer
lo C
C
I Check R306
and R309
Trackinterrupl
on
R306, R309
F306
=
200k
R309
=
237k
Delecl 4301 Repair
D
I Diode rneasuremenl
between AZc
Inputs
of
000061
(A301)
Hi
=
4301i
6
Lo
=
4301/7
Selecl; Function
V!
AUT ranging
Shortcircuil VQ/0
=0.6V
Relef lo E
Defet C303
Track
shorl circuit
E
D Resislors Ra
and Rb
000061
(A301)
R307
=
Ra
F308, R316
=
Rb
Selecl; Function V-
AUT renging
Shorlcircuit
Va/o
:
3ka
:30k4
E
SrgnaL lout
000061
(4301)
H
=
4301/11
Inslrumenl
swrtched oll
Q
meter
:10k
when Fl31l
is
=7k5
when R311 is
fitted
Defect A301
Check; R3l0/F311
and R312
Tracks
6.6.3. Adjustmenls
cannot
be
made
(Adj.
no. l0)
No. From
lVeasurement
Measu ring
points
N4easuring
data Correct
tncorrect
Signal Vinl
OQ0061
(4301)
Hi
=
A301/3
S€lecl;
Funclion
V-
AUT ranging
Supply;
gvtu
io
Va/o
Measured
wilh PM2524
685mvtu . . .699mvtu Refer
lo E Refer 10
I
a
Drain V301
Hi=
v301 drain
Instrument
seltings;
Measured wllh
PM2524
0,20lo lower as value
measureo
under A
Refer
to D Reter lo
C
a Vo lage
=:ovr
b Volläge
=
:5006
lower as rneasured