Sony MDX-C7970, Руководство по обслуживанию

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