JVC XM-P55 Service Manual page 3

Description of Major ICs
CXA2523AR(IC310):MD RF & Servo
1.Block Diagram
36 35
PEAK 37
RF 38
RFAGC 39
AGCI 40
COMPO 41
COMPP 42
ADDC 43
OPO 44
OPN 45
RFO 46
MORFI 47
MORFO 48
1 2
2.Pin Function
Symbol
I/O
Pin No.
1
I I
2
J I
3
VC O
4 A I
5 B I
6 C I
7 D I
8
E I
9
F I
10
PD I
11
APC O
12 APCREF I
13 GND -
14 TEMPI I
15 TEMP R I
16
SWDT I
17
SCLK I
18
XLAT I
19
XSTBY I
20
F0CNT I
34 33 32 31 30 29 28
ADIP Amp TE/SE Amp
MUX FE Amp
I-V Amp
3 4 5 6 7 8 9
I-V converted RF signal I input.
I-V converted RF signal J input.
Vcc/2 voltage output.
A current input for main beam servo signal.
B current input for main beam servo signal.
C current input for main beam servo signal.
D current input for main beam servo signal.
E current input for side beam servo signal.
F current input for side beam servo signal.
Reflection light quantity monitor signal input.
Laser APC output.
Reference voltage input for the laser power intensity setting.
Connect to GND.
Connects the temperature sensor.
Connects the temperature sensor. outputs the reference voltage.
Data input for microcomputer serial interface.
Shift clock input for microcomputer serial interface.
Latch signal input for microcomputer serial interface.Latched when low.
Standby setting pin. Normal operation when high Standby when low.
Internal current source setting pin.
27 26 25
24 Vcc
23 3TADJ
22 EQADJ
21 VREF
20 F0CNT
19 XSTBY
18 XLAT
CPU
17 SCLK
Command I/F
16 SWDT
15 TEMP R
TEMP Amp
14 TEMP I
13 GND
APC
10 11 12
Function
XM-P55
XM-PJ1
2-1