Sony Walkman MZ-R900 Service Manual - Page 35

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Sony Walkman MZ-R900 Service Manual

6-6. IC PIN FUNCTION DESCRIPTION

IC501 SN761057DBT (RF AMP, FOCUS/TRACKING ERROR AMP)
Pin No.
Pin Name
1
TE
2
REXT
3
WPPLPF
4
VREF11
5
C
6
D
7
D-C
8
IY
9
IX
10
JX
11
JY
12
A
13
A-C
14
B
15
TON-C
16
CIG
17
CDN
18
PD-NI
19
PD-I
20
PD-O
21
ADFG
22
DVDD
23
SBUS
24
SCK
25
RESET
26
OFTRK
27
DGND
28
BOTM
29
PEAK
30
VREF075
31
VC
32
CCSL2
33
RF OUT
34
AGND
35~37
EQ, LP, PS
38
AGND
39, 40
OFC2, OFC-1
41
ABCD
42
FE
43
S-MON
44
ADIP-IN
I/O
O
Tracking error signal output to the system controller (IC801)
—
Connect terminal to the external resistor for ADIP amp control
—
Connect terminal to the external capacitor for TPP/WPP low-pass filter
O
Reference voltage output terminal (+1V)
I
Signal (C) input from the optical pickup detector
I
Signal (D) input from the optical pickup detector
I
Signal (D) input from the optical pickup detector (AC input)
I
I-V converted RF signal (IY) input from the optical pickup detector
I
I-V converted RF signal (IX) input from the optical pickup detector
I
I-V converted RF signal (JX) input from the optical pickup detector
I
I-V converted RF signal (JY) input from the optical pickup detector
I
Signal (A) input from the optical pickup detector
I
Signal (A) input from the optical pickup detector (AC input)
I
Signal (B) input from the optical pickup detector
—
Connect terminal to the external capacitor for TON hold
Connect terminal to the external capacitor for the low-pass filter of NPP divider
—
denominator
Connect terminal to the external capacitor for the low-pass filter of CSL divider
—
denominator
I
Light amount monitor input terminal (non-invert input)
I
Light amount monitor input terminal (invert input)
O
Light amount monitor output terminal
O
ADIP duplex FM signal (22.05kHz 1kHz) output to the system controller (IC801)
—
Power supply terminal (+2.3V) (digital system)
I/O
SSB serial data input/output with the system controller (IC801)
I
SSB serial clock signal input from the system controller (IC801)
I
Reset signal input from the system controller (IC801) "L": reset
I
Off track signal input from the system controller (IC801)
—
Ground terminal (digital system)
Bottom hold signal output of the light amount signal (RF/ABCD) to the system controller
O
(IC 801)
Peak hold signal output of the light amount signal (RF/ABCD) to the system controller
O
(IC 801)
—
Connect terminal to the external capacitor for the internal reference voltage
O
Middle point voltage (+1.2V) generation output terminal
—
Connect terminal to the external capacitor for TPP/WPP low-pass filter
O
Playback EFM RF signal output to the system controller (IC801)
—
Ground terminal (analog system)
—
Connect terminal to the external capacitor for the RF equalizer
—
Power supply terminal (analog system) (+2.3V)
—
Connect terminal to the external capacitor for RF AC coupling
O
Light amount signal (ABCD) output to the system controller (IC801)
O
Focus error signal output to the system controller (IC801)
O
Servo signal monitor output to the system controller (IC801)
I
ADIP duplex FM signal (22.05kHz 1kHz) input terminal (not used in this set)
Description
MZ-R900
33