Sony MDX-C7900 Service Manual page 40

SERVO BOARD IC302 CXA2523R (RF AMP, FOCUS/TRACKING ERROR AMP)
Pin No. Pin Name
1 I
2 J
3 VC
4 to 9 A to F
10 PD
11 APC
12 APCREF
13 GND
14 TEMPI
15 TEMPR
16 SWDT
17 SCLK
18 XLAT
19 XSTBY
20 F0CNT
21 VREF
22 EQADJ
23 3TADJ
24 VCC
25 WBLADJ
26 TE
27 CSLED
28 SE
29 ADFM
30 ADIN
31 ADAGC
32 ADFG
33 AUX
34 FE
35 ABCD
36 BOTM
37 PEAK
38 RF
39 RFAGC
40 AGCI
41 COMPO
42 COMPP
43 ADDC
44 OPO
45 OPN
46 RFO
47 MORFI
48 MORFO
I/O
I
I-V converted RF signal I input from the optical pick-up block detector
I
I-V converted RF signal J input from the optical pick-up block detector
O Middle point voltage (+1.65V) generation output terminal
I
Signal input from the optical pick-up detector
I
Light amount monitor input from the optical pick-up block laser diode
O
Laser amplifier output terminal to the automatic power control circuit
I
Reference voltage input terminal for setting laser power
—
Ground terminal
I
Connected to the temperature sensor Not used (open)
O Output terminal for a temperature sensor reference voltage Not used (open)
I
Writing serial data input from the MD mechanism controller (IC501)
I
Serial data transfer clock signal input from the MD mechanism controller (IC501)
I
Serial data latch pulse signal input from the MD mechanism controller (IC501)
I Standby signal input terminal "L": standby (fixed at "H" in this set)
Center frequency control voltage input terminal of internal circuit (BPF22, BPF3T, EQ) input
I
terminal
O
Reference voltage output terminal Not used (open)
I
Center frequency setting terminal for the internal circuit (EQ)
I
Center frequency setting terminal for the internal circuit (BPF3T)
— Power supply terminal (+3.3V)
I
Center frequency setting terminal for the internal circuit (BPF22)
O
Tracking error signal output to the CXD2652AR (IC301)
I
Connected to the external capacitor for low-pass filter of the sled error signal
O
Sled error signal output to the CXD2652AR (IC301)
O
FM signal output of the ADIP
I
Receives a ADIP FM signal in AC coupling
I Connected to the external capacitor for ADIP AGC
O
ADIP duplex signal (22.05 kHz 1 kHz) output to the CXD2652AR (IC301)
O
Auxiliary signal (I signal/temperature signal) output terminal Not used (open)
3
O
Focus error signal output to the CXD2652AR (IC301)
O Light amount signal (ABCD) output to the CXD2652AR (IC301)
O
Light amount signal (RF/ABCD) bottom hold output to the CXD2652AR (IC301)
O
Light amount signal (RF/ABCD) peak hold output to the CXD2652AR (IC301)
O
Playback EFM RF signal output to the CXD2652AR (IC301)
I
Connected to the external capacitor for RF auto gain control circuit
I
Receives a RF signal in AC coupling
O
User comparator output terminal Not used (open)
I User comparator input terminal Not used (fixed at "L")
I
Connected to the external capacitor for cutting the low band of the ADIP amplifier
O
User operational amplifier output terminal Not used (open)
I
User operational amplifier inversion input terminal Not used (fixed at "L")
O RF signal output terminal
I
Receives a MO RF signal in AC coupling
O
MO RF signal output terminal
Function
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