DAEWOO ELECTRONICS DV-F202 Series, Service Manual

Page: 10 / 65

16 15
3. AFT COIL
• Connection Method
• Adjustment Procedure
1) Connect the TEST circuit to PIN
2
of H101
2) 12V to pin
6
and GND to PIN
7
of H101
3) Connect the signal Generator output to PIN
8
, and GND to PIN
7
4) Connect the oscilloscope to check point
5) Adjust L110 to obtain 2.3V ± 0.15V DC at “A” point DC Voltage change rapidly.
S/N : 97P650031A
C111 L110
IC101
R191
L103
C105
Z103
C122
Q102
C112
H101
1 8
L101
Q101
1
11 10
1
5
CH-1
OSCILLOSCOPE
CH-2
±12V
POWER SUPLLY
GND
2.3V±0.15V
OUT
SIGNAL GEN
GND
VCC+12V
43K
33K
18K
"A"
0.01µF
0.47µF
/50V
TEST CIRCUIT
#8
#7
"A"POINT
#8
#7
#6 #2
#6
#7
#2
l102
Carrier : Refer to input
signal table
on page 13.
+
Adj. Location Checking Point Measuring Equipment Input signal
Signal gen Refer to
L110 “A” Point Oscilloscope the
Power supply table on page13.
4. RF AGC
• Connection Method
• Adjustment Procedure
1) 12V to PIN
6
, and GND to PIN
7
of H101
2) Connect the signal generator output to pin
8
and GND to PIN
7
3) Connect the oscilloscope to check point
4) Adjust R191 to obtain 6.0 ± 0.2V DC at check point.
S/N : 97P650031A
C111 L110
IC101
R191
L103
C105
Z103
C122
Q102
C112
H101
1 8
L101
Q101
1
11 10
1
5
CH-1
OSCILLOSCOPE
CH-2
OUT
SIGNAL GEN
GND
GND
+12V POWER
SUPPLY
#6
#7
#6 #7
#8
#1
Z102
L108 L107
20
Carrier : Refer to input
signal table
on page 13.
Adj. Location Checking Point Measuring Equipment Input signal
H101 Signal gen Refer to
R191 PIN
1
Oscilloscope the
Power supply table on page13.