Sony Scd-1 Service Manual

41
¥ IC Block Diagrams
Ð AUDIO Board Ð
IC101, 201 CXA8042AS
IC302 CXD8594Q
123456789
10
11
121314
28272625242322212019
1817
1615
SWITCHING
CIRCUIT
CONSTANT
CURRENT
CIRCUITREFERENCE
VOLTAGE
CIRCUIT
CONTROL
CIRCUIT
I01+IN2–
IN2+
NC
IN1+
IN1–
NC
C4
C3
GND2
VEE2
VEE1
C6
C5
CIREF I02–
NC
I01–
I02+
NC
VCC2
C2
C1
VCC1
VREF
VCNT
GND1
RIREF
CLOCK
BUFFERSYNC
NC
52
IFSEL
53
NC54
DVSS55
64
51
MUTE
50
DVDD
43
DVDD
42
VSS2
63 VSS2
62 L1(+)61 VSS60 L1(-)59 VDD58 VDD257 SUB(C)56 SUB(D)
1024Fs CLOCK BUFFER
XVDD
XOUT
XIN...

42
Ð MAIN Board Ð
IC503, 505 BA5912AFP-YE2
IC713, 714, 715 TLC2932IPW-E20 IC1501 MC14053BDTR2
+
–+
–+
–+
–
+ –
+
–
+
–
+ –
GND
MUTE1
REF1
POW VCC1
OUT1–
OUT1+
GND
OUT2+
OUT2–
POW VCC2
PRE VCC
REF2
MUTE2OP2-IN+ OP2-IN– OP2-OUT IN1 IN1’
BIAS
GND
OP1-IN+
OP1-IN–
OP1-OUT
IN2’ IN2
125 24 23 22 21 20 19 18 17 16 15 14
2REF1
SWITCHLEVEL SHIFT
VREF2 VREF1LEVEL SHIFTCH2
MUTE
REF2
SWITCH CH1
MUTE
345 6 7 8 910111213
1234567
141312111098
PFD 1/2 DIVIDER
VCO
LOGIC
VDDSELECTVCO
OUTFIN-A FIN-BPFD
OUTLOGIC
GND
VCO
VDDR...

43
7-24. IC  PIN  FUNCTION  DESCRIPTION
· MAIN BOARD  IC701  HD6413002F16 (CPU)
Pin No. Pin Name I/O Description
1 VCC —
Power supply terminal (+5V)
2 SSSD I/O
Two-way data bus with the SACD/CD RF AMP (IC001)
3 SSI CLK O
Serial data transfer clock signal output to the SACD/CD RF AMP (IC001)
4 PWM O
PWM signal output to the loading motor drive (IC515)
5 JIG CTR I/O
Two-way data bus with the RS-232C (for check)
6 DF LT O
Latch signal output to the digital filter (IC301)
7 DCMF LT O
Not used (open)
8 DATA...

44
Pin No. Pin Name I/O Description
45 A8 O
46 A9 O
47 A10 O
48 A11 O
49 A12 O
50 A13 O
51 A14 O
52 A15 O
53 A16 O
54 A17 O
55 A18 O
Address signal output to the flash memory (IC716)
56 A19 O
Address signal output terminal     Not used (open)
57 VSS —
Ground terminal
58 WAIT I
Wait signal input from the ARP (IC702)
59 EEP SIO I/O
Two-way data bus with the EEPROM (IC735)
60 EEP SCL O
clock signal output to the EEPROM (IC735)
61 CLK O
System clock output terminal    Not used (open)
62 STBY I
Hardware...

45
Pin No. Pin Name I/O Description
87 ARPINT I
Interrupt signal input from the ARP (IC702)
88 SDSCS O
Chip enable signal output to the servo digital signal processor (IC512)
89 SDSACK I
Chip enable signal input from the servo digital signal processor (IC512)
90 CS1 O
Chip enable signal output to the S-RAM (IC717, 718)
91 CS0 O
Chip enable signal output to the flash memory (IC716)
92 VSS —
Ground terminal
93 SHR RDY I
Ready signal Input from the DSD decoder (IC703)
94 IFREQ O
Request signal output to the...

46
· MAIN BOARD  IC711  CXD1095R (EXPANDER)
Pin No. Pin Name I/O Description
1 AK1 O
2 AK2 O
3 MON3 O
4 MON4 O
Monitor signal output terminal    Not used (open)
5 MON5 O
6 MON6 O
7 MON7 O
8 VSS —
Ground terminal
9 WADCE O
Watermark signal output to the RF AD (IC708)
10 TEST O
Test signal output to the DSD decoder (IC703)     “H”:active
11 WMGC0 O
RF gain control for watermark signal output to the RF AD (IC708)
12 WMGC1 O
RF gain control for watermark signal output to the RF AD (IC708)
13 SHR RST O
Reset...

47
Pin No. Pin Name I/O Description
44 A0 I
45 A1 I
Address signal input from the CPU (IC701)
46 A2 I
47 REM CODE O
Remote category signal output terminal    “L”:CD2    “H”:CD1
48 — I
Not used (open)
49 NC —
Not used (open)
50 — I
Not used (open)
51 — O
Not used (open)
52 DF INIT O
Initial signal output to the digital filter (IC301)
53 MODE O
SACD/CD mode signal output to the digital filter (IC301)
54 A FILE O
Filter signal output terminal
55 VSS —
Ground terminal
56 VDD —
Power supply terminal (+5V)
57...

48
· MAIN BOARD  IC712  CXD1095R (EXPANDER)
Pin No. Pin Name I/O Description
1 STBL DTC I
Stabilizer detect signal input from the stabilizer detect sensor (IC009)
2—I
Not used (open)
3—I
Not used (open)
4 LD SW1 I
Loading panel close signal input from the close switch (S004)
5 LD SW0 I
Loading panel open signal input from the open switch (S003)
6 SLD SW1 I
Sled motor (out) signal input from the out switch (S001)
7 SLD SW0 I
Sled motor (in) signal input from the in switch (S001)
8 VSS —
Ground terminal
9...

49
Pin No. Pin Name I/O Description
47 — I
Not used (open)
48 — I
Not used (open)
49 NC —
Not used (open)
50 FCSDWN I/O
Two-way data bus with the SACD/CD RF AMP (IC001)
51 SDPREK O
SDPREK signal output to the sled motor drive (IC503)
52 SACDLDON O
Load signal output to the SACD/CD RF AMP (IC001)
53 TILT OUT O
Tilt out signal output to the tilt motor drive (IC505)
54 A ERR O
Not used (open)
55 VSS —
Ground terminal
56 VDD —
Power supply terminal (+5V)
57 TILT/H O
Tilt error signal output to the tilt error...

50
(1) GENERAL  (SCD-1)
SECTION  8
EXPLODED  VIEWS
Les composants identifiŽs par une
marque 0 sont critiquens pour la
sŽcuritŽ.

portant le numŽro spŽcifiŽ. The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified. ¥ Items marked Ò*Ó are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
¥ The mechanical parts with no reference num-
ber in the exploded views are...