DAEWOO ELECTRONICS DV-F882DY-C Service Manual page 10

3. AFT COIL
Adjustment Parts Checking Point
L105
• Connection Method
PIF PCB (Component Side)
P102
#7
L104
L105
GND
SIGNAL
GENERATOR
• Adjustment Procedure
1) Supply +12V 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
#3
L108
L101
TP1
Z101
L103
TP2
IC101
TP6 TP7
2.3±0.5V
#3
#2
OUT
fc: 38.9MHz, fm: 15.625KHz (30% AM Modulation)
Output level: 80dBµV (75Ω loaded)
Condition of Adj.
Oscilloscope
Signal Gen.
P101
L109
TP3
TP4
L110
7
Input Signal
Refer to the
EE Mode
followings
(Test circuit)
Vcc+12V
43kΩ
#7
CH-1
Oscilloscope
33kΩ
"A"
18kΩ
GND