JVC UX-M55 Service Manual page 29

TA2099 (IC101) : AM/FM tuner
1. Terminal layout
1
2
3
4
5
6
7
8
9
10
11
12
3. Pin function
Pin No. Symbol
1 AM RF IN
2 FM BW
3 FM VL SENS
4 AM OSC
5 AM OSC OUT
6 Vcc
7 AGC
8 GND
9 IF OUT/REQ
10 TUN LED
11 ST LED
12 R OUT
13 L OUT
14 BLENDER
15 LPF2
16 LPF1
17 FM ST DET IN
18 AM DET OUT
19 FM DET OUT
20 QUAD
21 AM IF IN
22 Vstb
23 AM MIX OUT
24 FM IF IN
2. Block diagram
24 23
24
23
REF
22
21
FM
20
IF
19
18
17
16
15
14
13
AM
MIX
1 2 3
I/O
I AM RF input signal terminal
O FM band width adjust terminal
I FM LED ON sensitivity adjust terminal
I AM OSC input terminal
O AM OSC output terminal
I Power terminal
O FM S-meter
- Ground
O IF count output terminal
O Connect tuner LED
O Connect stereo LED
O R-CH output signal terminal
O L-CH output signal terminal
O FM blender control adjust terminal
O LPF terminal for synchronous
O LPF terminal for phase detector
I FM ST DET input terminal
O AM DET output terminal
O FM DET output terminal
O FM demodulator
I AM IF input signal terminal
O Set to 2V internally
O AM MIX output terminal
I FM IF input signal terminal
22 20 19 18
21
FM
DET
AM
AM
IF
IF DET
BUFF
BUFF
FM
AGC
S-METER
AM
OSC
4 5 6 7
Function
17 16 15 14 13
AF VCD
DIVIDE
DECODE
MUTE
ANTI BIRDIE
LEVEL
SW
ST/MO
FM/AM
IF
IF REQ SW TUN ST
8 9 10 11 12
UX-M55
1-29