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Teilenummer | PM5519 |
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Beschreibung | Colour TV pattern generator Manual | |
Hersteller | PHilips | |
Logo | ||
Gesamt 30 Seiten Colour T V pattern generator
PM 5519
9452 055 19003
Service manual
9499 525 00711
8 7 0 5 0 1 /4
Industrial &
Electro-acoustic Systems
PHILIPS
http://www.Datasheet4U.com
Scientific &
lndustrial
Equipment
Division
850401
TEST AND MEASURING INSTRUMENTS
SGS47
PM 5519
Colour T V pattern generator
Already published:
Latest service manual:
SGS20, SGS27, SGS30, SGS37
9499 525 0071 1, dated 820801/3/01-10
1. Problem:
Solution:
In VIDEO EXT operating mode
- the pack porche of the sync pulse is distorted and
- the working point of transistor 317 is not okay.
- Transistor 317, BC 338, video input amplifier, unit 10 is replaced by BC 337-16,
5322 130 41095 from instruments L 0 18 ... onwards.
- Resistor 730 is paralled by a resistor 56K2.
2. Problem: IC 351 on unit 3, TCA 240, was sometimes not working properly.
Solution:
Alteration of resistor 604 from 825R to 715R, already inserted from L 0 13 ... onwards.
3. Problem: Diode BA 244, items 402, 404, 406 on unit 2 is not available anymore.
Solution:
Replaced by diode BA 482, 5322 130 34955, already inserted from L 0 17 ... onwards
4. Problem:
Solution:
The small knobs 5322 414 30027 for memostat, pie-selection unit, can sometimes be damaged.
Please operate the knobs only by hands or by cross-slotted screw-driver.
Don't operate with normal screw driver.
2
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6 Page 1.2.3. Video Part
-Video c a r r i e r
Frequency ranges
Range and frequency
selection
Indicator
- RF o u t p u t
Impedance
Output voltage
Attenuator
- Video modulation
- Video outputs
Connector 1
- Coupling
Connector 2
- Coupling
Impedance
Nominal v o l t a g e
Polarity
- Video input
Impedance
Nominal v o l t a g e
Polarity
Max. p e r m i s s i b l e
external voltage
38 - 90 Mhz ( I F and band I )
170 - 250 MHz (band III)
470 - 820 MHz (bands I V and V )
6 tip-touch button t o select the
preset channel frequency
of range and channel f o r each tip- touch
button
BNC c o n n e c t o r ( f r o n t p a n e l )
> 10 mVpp ( s y n c h r o n i z i n g l e v e l )
c o n t i n u o u s l y > 6 0dB
AM n e g a t i v e ( o r p o s i t i v e , s e l e c t a b l e by
solder link);
modulation w i l l take place on IF.
This modulated s i g n a l i s then mixed
up on RF.
Internal or external modulation
s e l e c t a b l e by means of push- button
f o r VCR ( r e a r p a n e l )
DC, mean v a l u e 1.8 V
BNC s o c k e t ( f r o n t p a n e l )
AC
1 Vpp i n t o a l o a d of 75R ( f i x e d p o s i t i o n of
V I D E O A M P L c o n t r o l ) 0 - 1.5 Vpp, c o n t i n u o u s l y
adjustable, i n t o a load of
positive
BNC c o n n e c t o r ( f r o n t p a n e l )
positive
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12 Page | ||
Seiten | Gesamt 30 Seiten | |
PDF Download | [ PM5519 Schematic.PDF ] |
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