DAEWOO ELECTRONICS DV-F952N, Service Manual

Page: 11 / 62

6. RF AGC
• Connection Method
• Adjustment Procedure
1) Turn on the VCR, Tuning CH21 (471.25MHz)
2) Connect the signal generator output to ANT INPUT of RF 102 (Modulator)
3) Connect the oscilloscope to JPT02
4) Adjust R190 to obtain 6.0±0.2V DC.
11
CH-1
Oscilloscope
MAIN PCB
RF Signal : PAL B/G (Color Bar or 100% white)
CH : 21 CH (471.25MHz)
UHF BAND
RF102
RF101 JPT02
RF103
R190
6.0±0.2V
Input Level : 70±1 dBµV
(75
Ω
Loaded)
RF OUT PM5418
Modulator ANT IN
Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal
R190 JPT02
Oscilloscope
EE Mode
Refer to the
PM5418 Gen. followings