JVC CA-PCX290, Service Manual

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3.Pin function
PCX290
55
1.Terminal layout
TA2153FN(IC302):RF Amplifier for Digital servo CD system
1.Terminal layout
2.Block diagram
Pin No. Symbol I/O Function
1 VCC - Power supply input terminal.
2 RFGC I RF amplitude adjststment control signal input terminal.
3 GMAD I Open loop gain adjustment terminal for AGC AMP.
4 FNI I Main beam I-V amp input terminal.
5 FPI I Main beam I-V amp input terminal.
6 TPI I Sub beam I-V amp input terminal.
7 TNI I Sub beam I-V amp input terminal.
8 MDI I Monitor photo diode amp input terminal.
9 LDO O Laser diode amp input terminal.
10 SEL I Laser diode control signal input terminal and APC Circuit ON/OFF control
11 TEB I Tracking error balance adjustment signal input terminal.
12 2VRO O Reference voltage (2VRO) output terminal.
13 TEN I TE amp negative input terminal.
14 TEO O TE error signal output terminal.
15 SBAD O Sub beam adder signal output terminal.
16 FEO O Focus error ignal output terminal.
17 FEN I FE amp negative
18 SEB I RFRP output circuit switching terminal.
19 VRO O Reference signal (VRO) output terminal.
20 RFRP O Track count signal output terminal.
21 BTC I Time constant adjustment terminal for bottom detection.
22 RECT O RFRP signal center lever output terminal.
23 PKC I Time constant adjustment terminal for peak detection.
24 RFRPIN I Input terminal for track count signal output amp.
25 RFGO O Output terminal for RF signal amplitude adjustment amp.
26 GVSW I Amp(AGC,FE,TE) gain switching terminal.
27 AGCIN I Input terminal for RF signal amplitude adjustment amp.
28 RFO O Output terminal RF signal amp.
29 GND - Ground terminal.
30 RFN2 I Input terminal for RF signal amp.
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