Description Of Major Ics - JVC XM-R700SL Service Manual

XM-R700SL

Description of major ICs

CXA2523AR (IC300) : MD servo
1.Block diagram
36
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.Pin function
Symbol
Pin No.
1 I
2 J
3
VC
4 A
5
B
6
C
7 D
8
E
9
F
10 PD
11
APC
12 APCREF
13 GND
14
TEMPI
15 TEMP R
16
SWDT
17
SCLK
18 XLAT
19
XSTBY
20
F0CNT
1-18
35 34 33 32 31 30 29
ADIP Amp
MUX FE Amp
I-V Amp
2 3 4 5 6 7 8
I/O
I I-V converted RF signal I input.
I-V converted RF signal J input.
I
Vcc/2 voltage output.
O
I A current input for main beam servo signal.
B current input for main beam servo signal.
I
C current input for main beam servo signal.
I
D current input for main beam servo signal.
I
E current input for side beam servo signal.
I
F current input for side beam servo signal.
I
Reflection light quantity monitor signal input.
I
Laser APC output.
O
I Reference voltage input for the laser power intensity setting.
Connect to GND.
-
Connects the temperature sensor.
I
I Connects the temperature sensor. outputs the reference voltage.
Data input for microcomputer serial interface.
I
Shift clock input for microcomputer serial interface.
I
Latch signal input for microcomputer serial interface.Latched when low.
I
Standby setting pin. Normal operation when high Standby when low.
I
Internal current source setting pin.
I
28 27 26 25
TE/SE Amp
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
9 10 11 12
Function