JVC CA-PCX290, Руководство по обслуживанию

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51
PCX290
30/MAR/2004
TA2149(IC101):3V AM/FM Chip Tuner IC(for Digital Tuning System)
1.Terminal layout 2.Block diagram
3.Pin function
13
DIVIDE
DECODE
14 15 16 17 18 19 20 21 22
23
24
1 2 3 4 5 6 7 8
9
10
11
12
AF
AF
BUFF
IF
REQ
SW ST
AM
OSC
FM
OSC
BUFF
FM RF
1/1 OR
1/16
LEVEL
DET
1/8
AM
IF
FM
IF
AGC
AM
MIX
FM
MIX
AM
DET
FM
DET
SM/MO
FM/AM
MUTE
IF
BUFF
BUFF
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Pin No. Symbol I/O Function
1 RF Gnd - Gnd for FM RF Stage
2 FM Rfin I FM in
3 AM Low Cut I AM Low cut
4 Mix Out O Mix out
5 Vcc - Vcc for AM, FM IF , MPX
6 AM IF IN I AM IF in
7 FM IF IN I FM IF in
8 GND - Gnd for AM, FM if , MPX
9 AGC O AGC
10 QUAD O FM detector
11 R-OUT O Right out
12 L-OUT O Left out
13 LPF2 I LPF terminal for phase detector
14 LPF1 I LPF terminal for synchronous detector
15 MPX IN I MPX in
16 DET OUT O Det out
17 IF REQ O IF REQ
18 ST LED O ST Led
19 OSC OUT O OSC out
20 AM OSC I AM OSC
21 FM OSC I FM OSC
22 AM Rfin I AM Rfin
23 RF Vcc - Vcc for FM RF Stage
24 FM Rfout O FM Rfout