DAEWOO ELECTRONICS DV-F882DY-C Service Manual page 18

5. RF AGC
Adjustment Parts Checking Point
R190
• Connection Method
MAIN PCB
• Adjustment Procedure
1) Turn on the VCR. Tuning CH21 (471.25MHz)
2) Connect the signal generator output (PM5418 pattern Gen) to ANT INPUT of RF102 (Modulator)
3) Connect the oscilloscope to JPT02
4) Adjust R190 to obtain 6.0±0.2V DC.
Measuring Equipment
Oscilloscope
JPT02
PM5418 Gen
RF OUT PM5418
Modulator ANT IN
RF102
RF101 JPT02
R190
RF103
RF Signal : PAL B/G (Color Bar or 100% white)
CH : 21 CH (471.25MHz)
UHF BAND
Input Level : 60 dBµV (I)
63 dBµV (B/G)
(75 ohm Loaded)
Condition of Adj.
EE Mode
15
Input Signal
Refer to the
followings
CH-1
Oscilloscope
6.0±0.2V