If Module Circuit Adjustment Method - DAEWOO ELECTRONICS DV-F882DY-C Service Manual

2-3. IF MODULE CIRCUIT ADJUSTMENT METHOD

2-3-1. PAL B/G 2 CARRIER SYSTEM
1. 32.4MHz TRAP
Adjustment Parts Checking Point
L101
• Connection Method
PIF PCB (Component Side)
P102
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 oscilloscope to TP1.
4) Adjust L101 until the level of signal becomes minimum.
Measuring Equipment
TP1
#2
#3
L108
L101
TP1
Z101
L103
TP2
IC101
TP6 TP7
#2 #3
fc: 32.4 MHz (No modulation)
OUT
Output Level: 80dBµV (75Ω loaded)
Condition of Adj.
Oscilloscope
Signal Gen
minimum
P101
L109
TP3
TP4
L110
5
Input Signal
Refer to the
EE Mode
followings
CH-1
Oscilloscope