Qls 14N23, Service Manual

Page: 32 / 54

Confidential
TMPA8873PSNG /CMNG /CPNG /CRNG /CSNG
2005/03/29 32
Pin
No.
Pin Name Function Interface Circuit I/O Signal
37 Reg Fil
Terminal to be connected
capacitor for stabilizing
internal bias.
37
17
18
5k
Ω
5k
Ω
38
AUDIO
Monitor out
Output terminal for External
audio signal or TV audio
signal selected by BUS
(Audio SW).
17
18
38
39 IF AGC
Terminal to be connected
with IF AGC filter.
39
36
40
500
Ω
20k
Ω
1.2k
Ω
1.2k
Ω
2k
Ω
100
Ω
6k
Ω
40 IF GND GND terminal for IF circuit.
⎯
41
42
IF in
Input terminals for IF
signals.
Pin41 and Pin42 are both
input poles of differential
amplifier.
50k
Ω
20pF
1.4k
Ω
50k
Ω
20pF
1.4k
Ω
41
42
36
40
43 RF AGC
Output terminal for RF AGC
control level.
43
36
40
200
Ω
2k
Ω
44 Black Det
Terminal to be connected
with Black Det filter for
black stretch.
44
47
18
4k
Ω
4k
Ω
45
SVM /
Monitor
Output terminal for monitor
function. Also output
terminal for SVM signal.
Selectable through IIC bus
17
18
45
200
Ω
500
Ω
46 APC filter
Terminal to be connected
with APC filter for Chroma
demodulation.
This terminal voltage
controls frequency of
VCXO.
152k
Ω
18
47
46
500
Ω
500
Ω