Aft Adjustment - Sanyo C21ZM40 Service Manual

AFT Adjustment
Item AGC VoltageAlignment
Resonance Frequency Adj.(rough) Resonance Frequency Adj.(fine)
DC 15.5V R563 (D592 side)
R563 (D592 side) R563 (D592 side)
.: IFAGC(3.5-4.5V) ICI01- pin48
IC101- pin48 ICI01- pin48
G BAN D
aJ
UHF(with Jig-A) UHF(with Jig-A)
UHF(with Jig-A)
c
c
Output Probe TUNER-TP
TUNER-TP TUNER-TP
6
InputProbe TP-F IC101- pin44
ICI01- pin44
Sweep ATT. 25 dB(TTL)
25 dB(TTL) 25 dB(TTL)
Output Probe sideb sideb
sideb
c
Dumping Resistor
R124 notused
o
Oscilloscope Sens.
not used
.-
10OmV/div
Ivlmf
.%
SG Output None
IVIDIV
-0
c
ATT 35dB
ATT 35dB
6
Fixthe AGC voltage when the Keep AGC voltage, and conform the Keep AGC voltage.
Adjustment
overall w aveform level is
marker position P isnear by the Ref.
Set the VIF Adjustor Sweep off and
adjustedat1.0Vp- p.
line.
pix. SG toCW output.
Using T1 21,adjustDC voltage to
Waveform ]-K
7
be36;:+goutput
w"~
HEADPHONE
')
(J"
Psmt
77
r
D
-=7?/
~a ~ '"'" R791
,, ~DJ QcnD-
VRS51
1 [\
'/
~ R563
au'
m
0'
~o
o
!
'/
'a
I
#
I
TP– E
I
I
L
:D
I
TP– FO
a
al
o I I
SW220
I
w ;
R124
r
~ ,6
@ T121
la
C270
H DELAY
Input Probe
+!!rtosc
Resonance Frequency Adi.
=2
100 Q Damping
Resistor
Output
Probe
~
u
o
IC451
o
VERT. AMP.
0+
O @():@''"E,
SW451
'o
--
~1
, ,R435jji%gzi&g@JpJ!<r j+
:',,:
..
M
a
0.002UF
=
Sweep
lKQ
Marker
b
75 Q
Generator
"G"
\
J
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