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1
PRO-200, PRO-100
3.6 TUNER 2 ASSY
A
TUNER 2 BLOCK
B
C
• ANTENNA SELECT : ANT A
• Video signal : NTSC color bar, 87.5% modulation
• Audio signal : 1kHz sinewave, ±25kHz deviation
• DC range (unless otherwise noted)
Voltage of TV FRONT END
Pin
1
2
3
6.9
5.5
5
Voltage (V)
Pin
10
11
12
Voltage (V)
–
–
–
TV Front End pin 18
1
V : 1V/div. H : 10µsec/div.
V1:
0.500V
TRIG1:
0.48V
T:
102.3mS
SAVE
D
0.1V
PEAK DET. 10mS
K
F
28
1
2
TV FRONT END SYSTEM UNIT
8.3V
33.9V
Q2101 :
+5V REGULATOR
4
5
6
7
8
9
–
–
8.9
5
–
33.2
13
14
15
16
17
18
8.9
4.6
0
2.3
1.1
4.6
TV Front End pin 18
1
V : 0.2V/div. H : 10µsec/div.
AC range
V1:
47.2mV
TRIG1:
42mV
-GND
20mV
PEAK DET. 10mS
2
3
34V
Q2102 : 2SC1740S
Q2102 : +30V REGULATOR
T3-pin 7
2
V : 1V/div. H : 10µsec/div.
T:
102.3mS
V1:
0.344V
TRIG1:
0.33V
0.1V
PEAK DET. 10mS
3
4
K
F
TUNER 2 ASSY (AWZ6296)
1
8.9V
Q2108, Q2109 :
AFT BUFFER
2.3V
2.3V
T3-pin 4
3
V : 1V/div. H : 20µsec/div.
T:
102.3mS
V1:
0.012V
TRIG1:
0.28V
SAVE
-GND
0.1V
PEAK DET. 20mS
4
T:
204.6mS
SAVE
-GND
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