Philips PM 5775 Manual page 72

SINGLE /
DOUBLE
T
1
1
1
1
1
'
1
i
i
i
1
|
1
1
1
'
1
'
!
1
!
DIFF AMPL. PULSE AMPLIFIER ORME
WIDTH || + and -
Vor ip x XI
2242 2256...2258
2248...2255
2238...2241
2243...2247
OK.
Check
amplifier X
$8 S4
Pesta 4 ae oe | Ty coe eh i
| WIDTH — 's3 aaeaitas '| AMPLITUDE !
peerarescess a ' L A \ N502 ! FINE RV3 ee ee oe
bee serey Sse s s. Lee qoor-- 4 L-----y------4
1 } I ' !
\ 1 1
: | peat Ge
boas
i eae fot b w e+ 2+
| '
f ' '
1 } i
a ae ee ee wee wee ee ee | !
! ;
eae taal
IN 502 |
2301...2324
& Faulty
Check Check Check
waveform waveform waveform
@ ®
Check diff. Check diff. :
amplifiers amplifiers |
Z 302...2310 Z 313 ...Z 323
OK.
Check
waveform
@
Z326, 2327, Z329,Z2330,
Z334,Z335,Z342
Faulty
Check driver XIL
and output XIV
Z 332, Z336,
OK.
Check
output XIZ
and
current source XY
Faulty
Check
power supply
Faulty
Check
supply voltages
No output
2343
H 2339, Z 340
1
1 CURRENT
shine ch || SouRCE DC oFree!
1 POS. PULSE +a =
! OUT. X¥ xv
Z3bh..2 367
hs Sh Poe a |S SS eee 7
\) I
i} 1
i) i)
H H
ATTENUA -
TOR ~~.
xvI
RE 301, RE302 PULSE OUT
delay, width,
amplitude and
Faults as regards
waveform distortion
P3
MA6426
CEES)
Negative
pulse faulty
Check DC offset
by turning RV4
waveform
Check sync out
pulse (6) at P2
Check if short
circuit exists,
check attenuator
Positive
pulse faulty
Check
negative pulse
Check current
source XIV