Sony MDS-JB920 service manual Section Diagrams, IC PIN Function Description

SECTION 6

DIAGRAMS

6-1. IC PIN FUNCTION DESCRIPTION

•BD BOARD IC101 CXA2523AR (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
15	TEMPR		O	Output terminal for a temperature sensor reference voltage
16		SWDT	I	Writing serial data input from the CXD2654R (IC121)
17		SCLK	I	Serial data transfer clock signal input from the CXD2654R (IC121)
18		XLAT	I	Serial data latch pulse signal input from the CXD2654R (IC121)
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
				from the CXD2654R (IC121)
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 CXD2654R (IC121)
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 CXD2654R (IC121)
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 CXD2654R (IC121)
33		AUX	O	Auxiliary signal (I3 signal/temperature signal) output to the CXD2654R (IC121)
34		FE	O	Focus error signal output to the CXD2654R (IC121)
35		ABCD	O	Light amount signal (ABCD) output to the CXD2654R (IC121)
36		BOTM	O	Light amount signal (RF/ABCD) bottom hold output to the CXD2654R (IC121)
37		PEAK	O	Light amount signal (RF/ABCD) peak hold output to the CXD2654R (IC121)
38		RF	O	Playback EFM RF signal output to the CXD2654R (IC121)
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

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