Diagrams; Explanation Of Ic Terminals - Sony MD Walkman MZ-E75 Service Manual

6-1. EXPLANATION OF IC TERMINALS

• MAIN BOARD IC501 CXA2523ATQ-T4 (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
SECTION 6

DIAGRAMS

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 (+1.2V) generation output terminal
I Signal input from the optical pick-up detector (A to F)
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
— Connected to the temperature sensor Not used (open)
— Output terminal for a temperature sensor reference voltage Not used (open)
I Writing data input from the CXD2661GA-2 (IC601)
I Serial clock signal input from the CXD2661GA-2 (IC601)
I Serial latch signal input from the CXD2661GA-2 (IC601)
I Standby control signal input from the system controller (IC801) "L": standby
Center frequency control signal input terminal of internal circuit (BPF22, BPF3T, EQ)
I
input from the CXD2661GA-2 (IC601)
— 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 (+2.4V)
I Center frequency setting terminal for the internal circuit (BPF22)
O Tracking error signal output to the CXD2661GA-2 (IC601)
I Connected to the capacitor for low-pass filter of the sled error signal
O Sled error signal output to the CXD2661GA-2 (IC601)
O FM signal output terminal of the ADIP
I Receives a ADIP FM signal in AC coupling
I Connected to the external capacitor for ADIP AGC
ADIP duplex FM signal (22.05 kHz ± 1 kHz) output to the CXD2661GA-2 (IC601)
O
O Auxiliary signal (I3 signal/temperature signal) output to the CXD2661GA-2 (IC601)
O Focus error signal output to the CXD2661GA-2 (IC601)
O Light amount signal output to the CXD2661GA-2 (IC601)
O Light amount signal (RF/ABCD) bottom hold output to the CXD2661GA-2 (IC601)
O Light amount signal (RF/ABCD) peak hold output to the CXD2661GA-2 (IC601)
O Playback EFM RF signal output to the CXD2661GA-2 (IC601)
I Connected to the external capacitor for RF auto gain control circuit
I Receives a RF signal in AC coupling
— User comparator output terminal Not used (open)
— User comparator input terminal Not used (fixed at "L")
I Connected to the external capacitor for cutting the low band of the ADIP amplifier
— User operational amplifier output terminal Not used (open)
— 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
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Description