Read Sony HCD-GX750 / HCD-RG551 / HCD-RX550 / MHC-GX750 / MHC-RG551S Service Manual online
22
HCD-GX750/RG551/RX550
SECTION 5
DIAGRAMS
5-1. IC PIN DESCRIPTIONS
• IC101 CXD3059AR (RF AMP) (BD81A BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
MIRR
I/O
Mirror signal input/output Not used in this set. (Open)
2
DFCT
I/O
Defect signal input/output Not used in this set. (Open)
3
FOK
I/O
Focus OK signal input/output Not used in this set. (Open)
4
VSS
—
Internal digital ground pin
5
LOCK
I/O
GFS is sampled at 460Hz; when GFS is high , this pin outputs a high signal
If GFS is low eight consecutive
6
MDP
O
Spindle motor servo control signal output
7
SSTP
I
Disc innermost detection signal input
8
IOVSS1
—
I/O digital ground pin
9
SFDR
O
Sled drive signal output
10
SRDR
O
Sled drive signal output
11
TFDR
O
Tracking drive signal output
12
TRDR
O
Tracking drive signal output
13
FFDR
O
Focus drive signal output
14
FRDR
O
Focus drive signal output
15
IOVDD1
—
I/O digital power supply pin (+3.3 V)
16
AVDD0
—
Analog power supply pin (+3.3 V)
17
AVSS0
—
Analog ground pin
18
NC
—
Not used. (Open)
19
E
I
E signal input
20
F
I
F signal input
21
TEI
I
Tracking error signal input
22
TEO
O
Tracking error signal output
23
FEI
I
Focus error signal input
24
FEO
O
Focus error signal output
25
VC
O
Center voltage output
26
A
I
A signal input
27
B
I
B signal input
28
C
I
C signal input
29
D
I
D signal input
30
NC
—
Not used. (Open)
31
AVDD4
—
Analog power supply pin (+3.3 V)
32
RFDCO
O
RFDC signal output Not used in this set. (Open)
33
PDSENS
I
Reference voltage pin for PD Connect to ground in this set.
34
AC_SUM
O
RFAC summing amplifier signal output
35
EQ_IN
I
Equalizer circuit signal input
36
LD
O
APC amplifier signal output
37
PD
I
APC amplifier signal input
38
NC
—
Not used. (Open)
39
RFC
I
Equalizer cut-off frequency adjustment pin
40
AVSS4
—
Analog ground pin
41
RFACO
O
RFAC signal output
42
RFACI
I
RFAC signal input or EFM signal input
43
AVDD3
—
Analog power supply pin (+3.3 V)
44
BIAS
I
Asymmetry circuit constant current signal input
45
ASYI
I
Asymmetry comparator voltage signal input
46
ASYO
O
EFM full-swing signal output (Low=VSS, High=VDD)
47
VPCO
O
Wide-band EFM PLL charge pump signal output Not used in this set. (Open)
48
VCTL
I
Wide-band EFM PLL VCO2 control voltage signal input
49
AVSS3
—
Analog ground pin
50
CLTV
I
Multiplier VCO1 control voltage signal input
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