Philips MX3900D Service Manual page 64

M5705 Pins Descriptions
Pin Name Pin No. Description
Power Pins
AVDD5_DS 4 Analog Power +5V for Data Slicer part.
AVDD5_DA 14 Analog Power +5V for DAC part.
AVDD5_AD 26 Analog Power +5V for ADC part.
AVDD5_PL 168 Analog Power +5V for Data PLL part.
VDD 7,55,58, Power + 3.3V for digital core logic and pad.
76,115,
146,150,
162
AVSS_DS 1 Analog Ground for Data Slicer part.
AVSS_DA 16 Analog Ground for DAC part.
AVSS_AD 22 Analog Ground for ADC part.
AVSS_PL 170 Analog Ground for Data PLL part.
GND 28,42,61, Digital Ground for core logic and pad.
88,110,
130,138,
154,165
11-5
SP32721A Internal Block Diagram
62 61 60 59
AGC
DVDRFP 1
IMPUT
ATT
MUX
BIAS
DVDRFN
2
MUX
CDRF 63
4
2
SEL INT
ATT
INPUT IMP
2
SEL
INPUT IMP
FROM
SEL
S-PORT
DVD FROM
S-PORT
SUM
12dB is added
Amp.
@high gain mode
A 14 LPF GCA
B 13 LPF GCA
A + D
C 12 GCA
LPF
11 LPF GCA
D
3 0dB@normal
B + C
FROM
12dB@high gain
S-PORT
mode
3.5dB@ normal
15.5dB @high gain
PD1 3
mode
Buff
PD2 4 1
TOPHOLD
VCI
TOPHOLD
16
E
+14dB @high gain mode
F 15 1
CDTE 17
SUM
(A2+B2+C2+D2)
Comp.
A2 5 GCA EQ
PHASE
DETECTOR
B2 6 GCA EQ
C2 7 GCA EQ
PHASE
DETECTOR
8 GCA EQ
D2
12dB is added
@high gain mode 2
VC
3
FROM
S-PORT
APC SEL
DVD/CD
From S-port
LD H/L
Sink current
From S-port
DVDPD 21
Dual APC 2
CDPD 23
BOTTOM
ENVELOPE
25 24 22 40 39 34
11-5
52 51 54 53 57
AGC HOLD
FAST Attackoff
PROGRAMMABLE
EQUALIZER
FULL WAVE
FILTER
AGC
DIFFERENTIATOR RECTIFIER
CHARGE
OUTPUT INHIBIT
PUMP
FROM
S-PORT
FROM
S-PORT
5
Offset
LPF cansel
GCA
MUX
FROM
4 S-PORT
FROM
5
S-PORT
Focus sel
Offset
LPF cansel
MUX
BCA
TOPHLD
Buff DET
COMP
Focus sel
DAC
2
FROM
S-PORT
Buff
0dB@normal
8dB @high gain mode
+6dB Amp
Offset
cansel
4
FROM
S-PORT
LPF
&ATT
0 to -14dB
3
FROM
S-PORT
POLSEL
CEPOL
BUFF
-12dB
SUB
MUX
Offset
LPF AMP
GCA
cansel
4
2
FROM
FROM
CP/CN
DVD CEFDB S-PORT
S-PORT
Low Imp
VCI2 for servo input
VCI for servo output
VC
CONTROL
Signals
To each block
SERIAL PORT
Mirr gain
REGISTER
From S-port
Comp
Disk det &
2 Mirr LPF hys & offset
Input Imp
From S-port
From S-port
From S-port
2
MIRR
INPUT
COMP
BUFF
PEAK/
Internal
BOTTOM
FDCHG
HOLD
35 33 30 31 32 29 58 28
49
56 BYP
55 RX
+6dB Amp
42 FE
+6dB Amp
36 PI
38 TPH
37 DFT
64
CDRFDC
43 CE
LCP
45
44 LCN
9 CP
10
CN
+6dB Amp
DPD
41
RST TE
DPD
Defect ON
18 VCI2
27
VCI
26
VC
48 SDEN
47 SDATA
46
SCLK
50 20