DAEWOO ELECTRONICS DV-F882DY-C Service Manual page 15

2. AFT COIL
Adjustment Parts Checking Point
L105
• Connection Method
J1
2.3±0.5V
L105
• Adjustment Procedure
1) Supply +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
Measuring Equipment
"A" point
#2
P102
TP1
#3
L108
J7
L103
TP2
J4
TP3
Z101
J19
IC101
fc: 39.5MHz (I)
GND
OUT
fc: 38.9MHz (B/G)
SIGNAL
fm: 15.625KHz (30% AM MODULATION)
GENERATOR
Output Level:80 dBµV (75Ω loaded)
Condition of Adj.
Oscilloscope
Signal Gen.
97P651111A
J15
D101
TP4
C153
IC104
12
Input Signal
Refer to the
EE Mode
followings
(Test circuit)
Vcc+12V
43kΩ
P101
#7
C181
CH-1
Oscilloscope
33kΩ
R163
18kΩ
C178 C176
C182
GND
"A"