Sanyo DC-DVD888 Service Manual page 51

IC BLOCK DIAGRAM & DESCRIPTION
IC131 PCM1723(D/A CONVERTER)
No. Name I/O DESCRIPTION
1 XT1 - 27 MHz x'tal oscillate input or external oscillator
2 SCKO O System clock output
3 VCP - PLL power source
4 NC - N.C
5 MCKO O Master clock buffer output
6 M L I
Software control latch
7 MC I
Software control clock
8 MD I
Software control data
9 RSTB I
Reset
10 ZERO O Zero data flag output
11 VOUTR O Rch. Analogue power output
12 GNDA - Analogue ground
13 VCA - Analogue power source +5V
14 VOUTL O Lch. Analogue power output
15 CAP - Output amplifier common
16 BCKIN I
Bit clock input for data
17 DIN I
Data input
18 LRCIN I
Basic sampling clock input
19 NC - N.C
20 RSV - N.C
21 VDD - Digital power source 5V
22 GNDD - Digital ground
23 GNDP - PLL ground
24 XTO - Crystal oscillator
IC136,504 TC7SHU04FU(INVERTER)
NC
1
IN A 2
GND
3
IC112,113 74VHC244MTC (LINE DRIVER)
LOGIC DIAGRAM
A1
2
A2 4
A3 6
A4 8
DATA
INPUTS
B1 11
B2 13
B3
15
B4 17
OEA 1
OUTPUT
ENABLES
OEB
19
FUNCTION TABLE
INPUTS
OEA, OEB A, B
L L
L H
H X
V
5
CC
OUT Y
4
18
YA1
16 YA2
14 YA3
12 YA4
NONINVERTING
OUTPUTS
9 YB1
YB2
7
5 YB3
3 YB4
OUTPUTS
YA, YB
L
H
Z
IC132 NJM4560(OP AMP)
A: OUT 1
A: -IN
2
A: +IN
3
4
V
EE
IC130 BMR-0302E(RESET)
IC133,135,137 NC7SZ08P5(2 INPUT AND GATE)
PIN ASSIGNMENT
OEA 20 Vcc
1
A1 2 19 OEB
YB4 3 18 YA1
B4
A2 4 17
YA2
YB3 5 16
A3 6 15 B3
YB2 YA3
7 14
A4 8 13 B2
9 12
YB1 YA4
GND 10 11 B1
- 57 -
A B
GND
V0
VCC
IN B V
1
5 CC
IN A 2
OUT Y
GND
3 4
8 Vcc
B: OUT
7
6 B: -IN
5
B: +IN