Ic Block Diagrams; Ic Pin Function - Sony HST-471 Service Manual

HST-471

4-11.IC BLOCK DIAGRAMS

IC302 LC7822 IC310 LC7824
1 30
1
IN 2 29 IN
IN 2
28
3
3
OUT 4 27 OUT
OUT 4
5 26
5
IN 6 25 IN
IN 6
7 24
7
OUT 8 23 OUT
OUT 8
22
9
9
IN IN
IN
IN
10 21
10
OUT 11 20 OUT
OUT 11
LEVEL SHIFT
12 19 VDD
VEE 12
VEE
CE 13 LATCH 18 RESET
CE
13
DI 14 17 S
DI
14
SHIFT RESISTOR
16 VSS
CL 15
CL 15
IC304 LV1016
24 23 22 21 20 19 18 17 16 15
ADM
VDD
ADM-CONT SRAM
+
+
L+DELAY R+DELAY
A
B
OUT-FILTER
–
IN-FILTER (7k/5k)
(40kHz) L–R
+
L+R
(–6dB)
B-NR
DEC
2 3 5 6 7 9 10
1 4 8
IC332 LB1641
T.S.D O.C.P
MOTOR MOTOR
DRIVE DRIVE
FWD/REV/STOP
CONTROL LOGIC
1 2 3 4 5 6 7 8 9 10
— 36 —
IC303 LA2786
BPF1 1 NOISE
BPF2 2 FILTER
30
IN
29
VREF 3 V REF
28
27 OUT
S-CH DC OUT 4
26
C-CH DC OUT
5
25 IN L-CH DC OUT 6
R-CH DC OUT 7
24
VREF 8
23 OUT
L-IN 9
22
IN IN
21
R-IN 10
20 OUT
LEVEL SHIFT
19 VDD
V SS 11
LATCH 18 RESET
17 S
SHIFT RESISTOR
16 VSS
14 13
L-BPF1 12
L-BPF2 13
L-BPF3 14
15
DC CUT
INV-PHASE
DC CUT 16
R RECT 17
L RECT 18
VOL/MUTE VLR-TH 19
DC-OUT
VLR-1 20
S-TRIM VLR-2 21
IC305, IC306 TDA7315
DIG OUT
SCL SDA GND LEFT
11 12 20 19 18
VOL/LOUD
SERIAL BUS DECODER/LATCH
VOL/LOUD
SUPPLY
1 2 3
IN (R) VS A GND TREBLE
LPF
NOISE
CH
42 CLK
NOISE
GENERATOR 41 DATA
BALANCE
40 ENABLE
CONTROL
DIVIDER OSC 39 OSC1
VR
CONTROL
38 V CC
VR 37 L-OUT
VR 36 R-OUT
S-OUT
VCA VCA 35
VCA VCA
34
C-OUT
VCA VCA 33 CMODE-CAP.
32 C-TRIM DC CUT
VCA VCA
LPF 31 R-BPF1
LPF
30 R-BPF2
29 R-BPF3
– +
RECT RECT RECT RECT 28 DC CUT
27 DC CUT
26 L-R RECT
25 L+R RECT
24 VCS-TH
LOG LOG
23 VCS-1
DIFF DIFF
22 VCS-2
OUT B OUT B IN B OUT B IN
RIGHT (R) (R) (L) (L) L
17 16 15 14 13 12 11
SPEAKER
BASS TREBLE
ATT
SPEAKER
BASS TREBLE
ATT
4 5 6 7 8 9 10
TREBLE R LOUD N.C LOUD N.C
(L) (R) (R) (L)
— 37 —

4-12. IC PIN FUNCTION

• IC701 SYSTEM CONTROL (µPD780204GF-024-3A)
Pin No. I/O Description
Pin Name
1 Vdd — 5V
2 ST MUTE O TUNER MUTE, H: ON.
3 ST STEREO I TUNER STEREO
4 ST TUNED I TUNER TUNED, L: TUNING.
5 ST CF O TUNER PLL latch (LC72130).
6 ST DI I TUNER PLL data in (LC72130).
7 ST DO O TUNER PLL data out (LC72130).
8 ST CLK O TUNER PLL clock (LC72130).
9 TC LINE MUTE O TC line mute, H: ON.
10 RESET I Reset signal input
11 X2 O X' tal (5MHz)
12 X1 I X' tal (5MHz)
13 1C — Ground
14 XT2 — OPEN.
15 VOLUME B I Encoder input B.
16 Vdd — 5V
17 VOLUME A I Encoder input A.
18 TA CLK O FUNCTION/PRO-LOGIC/DELAY/SW clock.
19 TA DATA O FUNCTION/PRO-LOGIC/DELAY/SW data out.
20 FUNC CE O FUNCTION (LC72130) latch.
21 PROG/DELAY CE O PROG (LA2786)/DELAY (LV1016) latch.
22 SW CE O S. WOOFER (LC7824) latch.
23 TC B TRG O Trigger motor control.
24 TC A TRG O Trigger motor control.
25 AVss — Ground
26 B HALF I B DECK half input.
27 A SHUT I A DECK reel pulse input.
28 B SHUT I B DECK reel pulse input.
29 KEY 4 I Key input.
30 KEY 3 I Key input.
31 KEY 2 I Key input.
32 KEY 1 I Key input.
33 MODE I Destination model identification input, H: E model.
34 AVdd — 5V.
35 AVdd — 5V.
36 IC MUTE O IC MUTE, L: ON.
37 TC REC/PB/PASS O TC REC/PB/PASS output. (HA12203NT).
38 POWER SENSE I POWER ON/OFF, H: ON.
39 SIRCS I SIRCS input.
40 Vss — Ground
41 SCL O Volume IC (TDA7315) clock.
42 SDA 2 I/O Volume IC (TDA7315) data. (REAR/CENTER).
43 SDA 1 I/O Volume IC (TDA7315) data. (BASS/TRE).
44 FRONT - RY O FRONT RELAY, H: ON.
45 SUR - RY/BRIDGE - RY O SURROUND/BRIDGE RELAY, H: ON.
46 Vdd — 5V.
47 H.P - RY O HEAD PHONE RELAY, H: ON.
48 S.W MUTE LED O S. WOOFER MUTE LED ON/OFF, H: ON.
49 PROG LED O PRO-LOGIC LED, H: ON.
50 LINE MUTE O LINE MUTE, L: ON.
— 38 —