Vif Adjustment - Sanyo C21ZM15 Service Manual

VIF Adjustment
Item Detector Adj, Overall Waveform(PAL)
DC 15.5V R563(D592 side)
R563 (D592 side)
: IF AGC(3.5-4.5V) ICI 01- pin48
ICI 01- pin48
~ BAND UHF(with Jig-A) UHF(with Jig-A)
: Output Probe
Tuner- TP Tuner-TP
~ Input Probe
TP-F TP-F
Sweep ATT, 25 dB(TTL) 25 dB(TTL)
: Output Probe side b
side b
E Dumping Resistor not used
R1 24(100 Q resister)
I? Oscilloscope Sens. 100mV/DIV
100mV/DIV
s
Adjust P (38.9MHz) to
Usin Tuner Converter Coil
7 and 101, adjust the marker
be maximum by usin9
position to be
Adjustment
T121 . P 38.9 MHz)=45~o * 10%
\
c
34.47 MHZ)=45% * 1o%
Waveform
A >[:+1
Oscilloscope
D%)
Input
Probe
PROG
LEVEL
DC15.5V ]
Main Unit
+-
=
u
Uu
CID
0
~
0
T
~(
Pssill
P
"/
p;tin F "
R5CQ
Q
00715 ~jJg,
05ss a"
B 1 A;J
1
0
0
IC451
o
VERT AMP
0+
O @~[@lS,,E
SW451
,
-8–
Overall Waveform(PAL) Adj.
'-+!a-
/'
ba
6
-ED
TP– E
j R563
mu'
m
o'
~o
o
Detector Adj.
TP-F#' a _
SW220
o
w
RI 24
I
,ti
@
T121
Iclol
=3
100 Q Damping
Resistor
7
lF/COLOUR
DEFLECIRONO
pin -48
os
VR40t
QQ
VRW.O
~:
T1 1
k
B
Output Probe
m'i'or
k--l
C270
H DELAY
TELETEXT UNIT
l—
I