DAEWOO ELECTRONICS DV-F952N, Руководство по обслуживанию

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2. AFT COIL
• Connection Method
• Adjustment Procedure
1) 12V DC to Pin No.1, and GND to Pin No 2. of 102
2) Connect the signal generator output to pin 3 and GND to pin 2 of P102.
3) Connect the test circuit to pin No.7 of P102
4) Connect the oscilloscope to “A” point and GND
5) Adjust L105 to obtain 2.3V DC voltage at the "A" point
13
97P651111A
P102
P101
TP1
SIGNAL
GENERATOR
GND
OUT
fc: 39.5MHz (I)
fc: 38.9MHz (B/G)
fm: 15.625KHz (30% AM MODULATION)
Output Level:80 dBµV (75
Ω
loaded)
2.3±0.5V
#2
#3
R103
J1
L104
L105
Z101
C107 C106
IC101
L103
TP2
J4
C115 TP3
J19
IC102
L108
J7
J14
J12 J13
J15
C181
D101
R163
L112
X102
30
27
D102
C153
C182
C176 C178
TP4
J11 J10
J9 J8
IC104
J6
CH-1
Oscilloscope
#7
43k
Ω
33k
Ω
18k
Ω
(Test circuit)
Vcc+12V
GND
"A"
Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal
L105 “A” point
Oscilloscope
EE Mode
Refer to the
Signal Gen. followings