Aft Adjustment - Sanyo C21ZM15 Service Manual

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AFT Adjustment
'L
.
.
s
L
Item AGC Voltage Alignment Resonance Frequency Adj.(rough)
Resonance Frequency Adj.(fine)
DC 15.5V R563 (D592 side)
R563 (D592 side) R563 (D592 side)
.6 IF AGC(3.5-4.5V)
ICI 01- pin48 IC101 - pin48 IC101 - pin48
j BAND UHF(with Jig-A) UHF(with Jig-A) UHF(with Jig-A)
: Output Probe TUNER-TP TUNER-TP
TUNER-TP
G
Input Probe
TP-F IC101 - pin44 ICI 01- pin44
Sweep ATT, 25 dB(TTL) 25 dB(TTL)
25 dB(TTL)
Output Probe
side b side b
side b
c
Dumping Resistor
R124 not used
o
Oscilloscope Sens.
10OmV/div
not used
.-
1V/DIV
c SG Output
.5
-0 None
ATT 35dB
1VIDIV
ATT 35dB
8
Fix the AGC voltage when the
Keep AGC voltage, and conform the Keep AGC volta9e.
Adjustment
overall waveform level is
marker position P is near by the Ref.
Set the VIF Adjustor Sweep off and
adjusted at 1.0 Vp - p.
line.
pix. SG to CW output.
Using T1 21, adjust DC voltage to
—
be 3.6V ? 0.2V.
Waveform
m-p *"''ine
3
PROG.
M
?~
DC15.5V
Main Unit
Dn
n
D
o ,
a
BB
Icm
a
/u
/
.-
m
$
A l
/
TP-E
El
f'
I
I
:B
7
Iclol I
m
t
in-44 .
C270
H OELAY
pin-4S
@
VR4LU
QQ
VR120
~: E
/-
T101
B
1
Input Probe
+!5°s=''
Resonance Frequency Adj.
=2
100 Q Damping
Resistor
OUtDUt
Probe
m
0,002UF
Sweep
Marker
75 Q
Generator
/——————
{OY3
5V
17+7
–9-