Circuit Alignment - Sanyo CE28D4-C Service Manual

CIRCUIT ALIGNMENT

VIF alignment
SETTING
DC 15.5V
AGC voltage (4.3-4.5V)
Output probe
Input probe
Marker frequency
Sweep ATT
0dB=176mVrms/75
SIF alignment
SETTING
DC 12V
AGC voltage
Output probe
Input probe
Sweep ATT
Marker Frequency
Pilot alignment
SETTING
Oscilloscope
Input sound signal source
TV system
Deviation
Mode
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C644 +
By using T141, adjust "P" to
IC201-pin48
be maximum amplitude.
IC201-pin45
(Side b)
IC201-pin7
38.9MHz
20dB
IC3801-pin11
1. Adjust AGC voltage to be
IC3801-pin3 "A" = 0.5Vp-p.
IC3801-pin1 2. By using T3801, adjust "P"
(Side b)
to be equal centre line.
IC3801-pin12
10dB
38.9MHz
IC3401-pin5
By using T3401, adjust
amplitude to be maximum.
System B/G
27kHz
Stereo
10kΩ
Input probe
Adjustment
Adjustment
Adjustment
-9-
0.002µF
a
75Ω b
1kΩ
Output probe
Waveform
P
Waveform
"A"
P
Waveform
A
F7WTV