![background image](http://html.mh-extra.com/html/sony/hcd-m90/hcd-m90_service-manual_420804088.webp)
88
HCD-M90
6-54.
IC PIN FUNCTION DESCRIPTION
•
RF-240 BOARD IC001 SP3728AC (DVD/CD RF AMP, FOCUS/TRACKING ERROR AMP)
Pin No.
Pin Name
I/O
Description
1, 2
RFIP, RFIN
I
RF signal input
3
CP
—
Tracking LPF terminal
4
WIN
I
Wobble detection signal input terminal Not used
5
WPP
O
Wobble push-pull signal output terminal Not used
6
CN
—
Tracking LPF terminal
7 to 10
A2 to D2
I
Photo detector interface input (AC coupled input for the DPD and wobble)
11 to 14
D to A
I
Photo detector interface input (main)
15 to 18
E to H
I
Photo detector interface input (sub)
19
VC
O
Reference voltage (+2.5V) output terminal
20
VPB
—
Power supply terminal (+5V) (servo block)
21
DVDPD
I
DVD APC signal input
22
CDPD
I
CD APC signal input
23
VNB
—
Ground terminal (servo block)
24
LDSELO
O
APC LD select signal output
25
DVDLD
O
DVD APC signal output
26
CDLD
O
CD APC signal output
27
LDON
I
APC LD output control signal input terminal
28
MEVO
O
Envelope signal output terminal for mirror
29
MIN
I
RF signal input terminal for mirror
30
MP
—
Mirror top hold terminal
31
MB
—
Mirror bottom hold terminal
32
MLPF
—
Mirror LPF terminal
33
MIRR
O
Mirror detect signal output to the servo DSP
34
BYP2
—
Servo AGC gain control terminal
35
PII
I
Pull-in signal input
36
PI
O
Pull-in signal output
37
TZC
O
Tracking zero crossing signal output to the servo DSP
38
DFT
O
Defect signal output to the servo DSP
39
VCI
I
Reference voltage input terminal
Tracking zero crossing signal input
Tracking error signal output to the servo DSP
Focusing error signal output to the servo DSP
Monitor signal output to the servo DSP
Serial data output to the servo DSP
Serial data input from the servo DSP
Serial clock signal input from the servo DSP
48
SDEN
I
Serial data enable signal input from the servo DSP
49
V33
—
Power supply terminal (+3.3V) (CMOS output buffers)
50
RX
I
Reference resistor input terminal
51
TPA
—
RF top hold terminal
52
MEV
—
RF bottom envelope terminal
53
VNA
—
Ground terminal (RF block and serial port)
54, 55
FNN, FNP
O
Differential filter normal signal output
56, 57
DIP, DIN
I
Analog signal input terminal for RF single buffer
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299