Block Diagram - Philips PM 5508 Operating Manual

15
r
Master
o scillatar
312,5 kHz
117
S haper
U2
Subc.
oscillator
U4
1
PAL 90°
~► switch
faseshift
0/180° U4
U4
SK4
►~•
' Power
I
on"
l 1
R-Y mod. B -Y mod.
Line
information
2:1 div. 9e n.
U2
AND
gate
'J2
2:1
Div.
U2
Colour
bar
gen.
o< co m m
>
Y
2
S
Line blank.
gen.
51 div
U2
1
Matrix
s
0 .~
w
(R)
~
Stab. ~ +6V
~.3121(viaSK3)—► SQ~100%
power
—►
OV R~ Sat.
supp.
U1 —r.-6V
G—~
U4
Matrix for
burst and
testpatt ~~
Line sync
gen.
U2
—►
(G)
Matrix for
burst and
testpattern
U4
~~
J .o
iu
C
m
2:1
Div.
Burst
key
gen.
U4
1
s
a1
~.
~
in
1 1
R-y
modulator
U4
U2
+6 V
—r.
B -Y
modulator
U4
m
4+1
Div.
U2
(8l
31
Div,
U
_1
2
124
M
m
9urstampl. ~ ~
R1/0-200% ~
g
SK2 100% T
'>.
1 ~
Chrominance
adder
Luminance
ampL
U2
13:1
Div
1
m
—i
Field blank
gen
N
2~
Field sync
9~
Y3 ~ 1
a
Z
y
' 1 ` '
1
v =
c
o
0 -
~
~ m rn b > >
m o, ~. Z_ 2 a 2 n co a
~1~1111111
Gate circuit
for
BI~Wh pattern
U2
U3
in~a w
~~1~11
Gate circ.
for
ync/blank
<11
Luminance
sync blank
adder
U2
Y- Delay
U4
1
L
Video
ampl.
U4
1
Y
N
0
n
Frame
infomnotion
gate
U3
1
2
a
I
+
1
■
41
Div
1 _~
U]
D7
Ol
2
l000
H:
oscillator
U4
3
'Line"
'ls ►—~.
'fs'~~
"Frame"
SKS
FM
mod.
U4
Soundsubc
osc.
U4
l
Modulator
` U5
~~
SK1
'Mod'
_/ ~~+6V
SK7
"Unmod."
RF
osc.
US
i
R2
'RF Output' s
I
I
J
PEM 4038
1
BUl
Sync•
~p1BU2
I
I
J~~ BU4
RF out"
~ BU3
°Video
out "
Fig. IV-1.
Block diagram