Marantz SA17S1 Service Manual page 21

Super audio cd player
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Analog Pins
Name
Type
Description
BYP
The RF AGC integration capacitor CBYP, is connected between BYP and VPA.
CP
DIFFERENTIAL PHASE TRACKING LPF PIN: The external capacitance is connected between CN.
CN
DIFFERENTIAL PHASE TRACKING LPF PIN: The external capacitance is connected between CP.
LCP
LENS SHIFT OFFSET CANCEL LPF PIN: The external capacitance is connected between LCN.
LCN
LENS SHIFT OFFSET CANCEL LPF PIN: The external capacitance is connected between LCP.
MP
MIRR TOP HOLD PIN: The external capacitance is connected to VPB.
MB
MIRR BOTTOM HOLD PIN: The external capacitance is connected to VPB.
MEV
RFDC BOTTOM ENVELOPE PIN: The external capacitance is connected to VPA.
MLPF
MIRROR LPF PIN: An external capacitance is connected to VPB.
TPH
PI TOP HOLD PIN: An external capacitance is connected to VPB.
VC
REFERENCE VOLTAGE OUTPUT: This pin provides the DC bias reference voltage (VPB/2). Output impedance is less
than 50 Ω.
V125
REFERENCE VOLTAGE OUTPUT: DC bias voltage output and it is also used for servo output reference. (V25/2)
RX
REFERENCE RESISTOR INPUT: An external 12.0 k&, 1 % resistor is connected from this pin to ground to establish a
precise PTAT (proportional to absolute temperature) reference current for the fi lter.
Q101 : CXD1881R
1
DVDRFP
AT T
2
MUX
DVDRFN
RFS I N
6 3
2
ATT
I NPUT
I NPUT I MP
SEL
SEL
A
W / LPF
A
1 2
GCA
B
W / LPF
CD_ A
1 6
GCA
C
W / LPF
B
1 1
GCA
D
W / LPF
CD_ B
1 5
GCA
MUX
C
1 0
GCA
CD_C
1 4
GCA
D
9
GCA
CD_D
1 3
GCA
1 2 dB i s a d d e d
CD / DVD
@ h i g h g a i n mo d e
6 dB i s a d d e d
@ h i g h g a i n mo d e
CD_ E
1 8
GCA
CD_ F
1 7
GCA
3
FROM
S - PORT
3
A 2
GCA
EQ
4
B 2
GCA
EQ
C2
5
GCA
EQ
D2
6
GCA
EQ
3
3
FROM
S - PORT
1 2 dB i s a d d e d
@ h i g h g a i n mo d e
APC SE L
DVD / CD
F r om S - p o r t
LD H / L
2 3
DVDPD
Du a l APC
2 4
CDPD
2 6
2 2
6 2
6 1
6 0
5 9
AGC
PROGRAMMAB L E
I NPUT
B I AS
D I F FERENT I ATOR
4
2
I NPUT I MP
SEL
SSOUT
C l amp
& E n v
2
L e v e l
S I GDET
DAC
B +D
SUM
4 d B
Amp .
GCA
A +C
1 2 dB i s a d d e d
@ h i g h g a i n mo d e
A +D
B +C
TOPHOLD
3
FROM
TOPHOLD
S - PORT
+ 3 d B
4 d B
GCA
4
FROM
S - PORT
Comp .
PHASE
DETECTOR
PHASE
DETECTOR
VC
M i r r g a i n
S i n k c u r r e n t
F r om S - p o r t
F r om S - p o r t
2
I n p u t l mp
2
F r om S - p o r t
P l l
2
AGCO
BOT TOM
I NPUT
ENVELOPE
BUF F
MUX
2 1
5 0
3 2
3 1
5 3
5 2
5 5
5 4
5 7
EQUA L I ZER
FUL L WAVE
F I L TER
RECT I F I ER
OUTPUT I NH I B I T
FROM S - PORT
AGCO
FROM
S - PORT
5
7 0 k H z
O f f s e t
L PF
c a n s e l
FROM
4
S - PORT
FROM
5
S - PORT
7 0 k H z
O f f s e t
L PF
c a n s e l
BCA DET
TOPHLD
DAC
FROM
2
S - PORT
Bu f f
- 6d B @ n o r ma l
O f f s e t
GCA
c a n s e l
6 dB
6 d B , 4 b i t
4
Amp
FROM
P I
S - PORT
FE
TE
CE
V2 5
V1 2 5
V2 5 / 3
LPF
3
CE - AT T
ATT
Po l s e l .
CEPOL
b u f f ( -12 d B )
MUX
SUB
O f f s e t
L PF
c a n s e l
6
FROM
CD / DVDCP / CN
CEFDB
S - PORT
L ow l mp
f o r s e r v o o u t p u t r e f .
V C I f o r s e r v o i n p u t
CONTROL
S i g n a l s
T o e a c h b l o c k
SER I A L PORT
Comp
REG I STER
D i s k d e t &
h y s & o f f s e t
F r om S - p o r t
M i r r L PF
F r om S - p o r t
M I RR
COMP
PEAK /
L I NKEN
BOT TOM
HOLD
I n t e r n a l
FDCHG
3 0
2 8
2 9
3 3
2 7
31
AGC HOLD
FAST A t t a c k o f f
AGC
CHARGE
PUMP
5 6
BYP
4 9
RX
6 d B , 4 b i t
GCA
4 0
FE
P l l
3 8
P I
3 5
TPH
COMP
SE L
3 4
DF T
6 1
RFDC
4 1
CE
4 2
MNTR
MNTR
Cn t r l
4 4
LCP
4 3
LCN
SE L
HLDEN
7
CP
8
CN
TE
GCA
3 9
TE
RST
3
FROM
S - PORT
3 7
V 2 5
V2 5 /2
3 6
V 1 2 5
VC=VPB / 2
2 0
VC
4 8
SDEN
4 7
SDATA
4 6
SCL K
V 3 3 f o r
4 5
V 3 3
o u t p u t b u f f
5 8
1 9
5 1
2 5

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