Sony MZ-R900 service manual IC PIN Function Description

MZ-R900

6-6. IC PIN FUNCTION DESCRIPTION

•IC501 SN761057DBT (RF AMP, FOCUS/TRACKING ERROR AMP)

Pin No.	Pin Name		I/O	Description
1		TE	O	Tracking error signal output to the system controller (IC801)
2		REXT	—	Connect terminal to the external resistor for ADIP amp control
3		WPPLPF	—	Connect terminal to the external capacitor for TPP/WPP low-pass filter
4		VREF11	O	Reference voltage output terminal (+1V)
5		C	I	Signal (C) input from the optical pickup detector
6		D	I	Signal (D) input from the optical pickup detector
7		D-C	I	Signal (D) input from the optical pickup detector (AC input)
8		IY	I	I-V converted RF signal (IY) input from the optical pickup detector
9		IX	I	I-V converted RF signal (IX) input from the optical pickup detector
10		JX	I	I-V converted RF signal (JX) input from the optical pickup detector
11		JY	I	I-V converted RF signal (JY) input from the optical pickup detector
12		A	I	Signal (A) input from the optical pickup detector
13		A-C	I	Signal (A) input from the optical pickup detector (AC input)
14		B	I	Signal (B) input from the optical pickup detector
15		TON-C	—	Connect terminal to the external capacitor for TON hold
16		CIG	—	Connect terminal to the external capacitor for the low-pass filter of NPP divider
				denominator
17		CDN	—	Connect terminal to the external capacitor for the low-pass filter of CSL divider
				denominator
18		PD-NI	I	Light amount monitor input terminal (non-invert input)
19		PD-I	I	Light amount monitor input terminal (invert input)
20		PD-O	O	Light amount monitor output terminal
21		ADFG	O	ADIP duplex FM signal (22.05kHz ± 1kHz) output to the system controller (IC801)
22		DVDD	—	Power supply terminal (+2.3V) (digital system)
23		SBUS	I/O	SSB serial data input/output with the system controller (IC801)
24		SCK	I	SSB serial clock signal input from the system controller (IC801)
25		RESET	I	Reset signal input from the system controller (IC801) “L”: reset
26		OFTRK	I	Off track signal input from the system controller (IC801)
27		DGND	—	Ground terminal (digital system)
28		BOTM	O	Bottom hold signal output of the light amount signal (RF/ABCD) to the system controller
				(IC 801)
29		PEAK	O	Peak hold signal output of the light amount signal (RF/ABCD) to the system controller
				(IC 801)
30	VREF075		—	Connect terminal to the external capacitor for the internal reference voltage
31		VC	O	Middle point voltage (+1.2V) generation output terminal
32		CCSL2	—	Connect terminal to the external capacitor for TPP/WPP low-pass filter
33		RF OUT	O	Playback EFM RF signal output to the system controller (IC801)
34		AGND	—	Ground terminal (analog system)
35~37	EQ, LP, PS		—	Connect terminal to the external capacitor for the RF equalizer
38		AGND	—	Power supply terminal (analog system) (+2.3V)
39, 40	OFC2, OFC-1		—	Connect terminal to the external capacitor for RF AC coupling
41		ABCD	O	Light amount signal (ABCD) output to the system controller (IC801)
42		FE	O	Focus error signal output to the system controller (IC801)
43		S-MON	O	Servo signal monitor output to the system controller (IC801)
44		ADIP-IN	I	ADIP duplex FM signal (22.05kHz ± 1kHz) input terminal (not used in this set)

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