Sanyo DC-TS765KR Service Manual page 29

IC BLOCK DIAGRAM & DESCRIPTION
IC471,491 KIA2058,NJM4558M(Operational Amplifier)
A OUTPUT 1
A
2
A INPUT
3
A +INPUT
V+ 4
5
B+INPUT
6
B INPUT
B
7
B OUTPUT
IC462,472 LM1876 (Dual 20W audio Power Amplifier)
15 Vcc B
14 Standby B
13 + In B
12 - In B
11 Mute B
10 GND B
9 Standby A
8 + In A
7 - In A
6 Mute A
5 GND A
4 V
EE
3 Out A
2 V
CC
1 Out B
IC482 LM4700TF (30w audio Power Amplifier)
11 STANDBY
10 V
9 V
8 MUTE
7 GND
6 NC
5 NC
4 V
3 OUTPUT
2 NC
1 V
IC483 LM3876TF (56w audio Power Amplifier)
11 NC
10 V
9 V
8 MUTE
7 GND
6 NC
5 NC (+)
4 V-
3 OUTPUT
2 NC
1 V+
14
D OUTPUT
D
D INPUT
13
12 D+INPUT
V
11
10 C+INPUT
C INPUT
9
C
8 C OUTPUT
Vcc
A
2
+In A 8
Amp A
-In A 7
4 5
A
V GND
EE
A
Vcc
+
IN
1
-
IN
V + 10
IN
3
V - 9
IN
EE
4 7
CC
V GND
EE
V+
+
IN
1
-
IN
V + 10
IN
V - 9
IN
7 4
GND V-
IC601 PT6315 (VFD Driver/Controller)
7
DIN
Serial
DOUT 6
Data
CLK
8
Interface
STB 9
OSC 5 OSC
LED1 1
LED
2
LED2
Driver
3
LED3
LED4 4
Pin Name
LED1 to LED4
OSC
DOUT
3 Out A
DIN
(Schmitt Trigger)
CLK
(Schmitt Trigger)
STB
(Schmitt Trigger)
K1 to K2
VSS
VDD
SG1/KS1 to SG16/KS16
VEE
SG17/GR12 to SG24/GR5
GR4 to GR1
OUTPUT
3 OUTPUT
- 29 -
Control
Display Memory
(24 bits x 17 Words)
TI~inc Generator
Key Moter Memory
Driving Circuit
10 11 13 30
K1 K2 VDD GND VEE
I/O Description
O LED Output Pin
Oscillator Input Pin
I A resistor is connected to this pin to
determinc the oscillation frequency
Data Output Pin (N-Channel, Open-Drain)
O This pin outputs scrial data at the falling
cdge of the shift clock (starting from the lower bit)
Data Input Pin
I This pin inputs serial data at the rising cdge
of the shift clock (starting from the lower bit)
Clock Input Pin
I This pin reads serial data at the rising cdge
and outputs data at the falling cdge.
Serial Interface Strobe Pin
The data input after the STB has fallen is
I
processed as a command.
When this pin "HIGH",CLK is ignored,
Key Data Input Pins
I The data inputted to these pins are fatched
at the end of the display cycle.
- Logic Ground Pin
- Logic Power Supply
High-Voltage Segment Output Pins
O
Also acts as the Key Source
- Pull-Down Level
O High Voltage Segment/Grid Output Pins
O High-Voltage Grid Output Pins
14 SG1/KS1
15
SG2/KS2
SG3/KS3
16
17 SG4/KS4
18 SG5/KS5
19 SG6/KS6
Segment 20 SG7/KS7
Driver
21 SG8/KS8
22 SG9/KS9
Grid
23
Driver SG10/KS10
24
SG11/KS11
Key Scan
25 SG12/KS12
Output
26 SG13/KS13
27 SG14/KS14
28 SG15/KS15
30
SG16/KS16
31 SG17/GR12
32 SG18/GR11
33
SG19/GR10
34
SG20/GR9
35 SG21/GR8
36 SG22/GR7
37 SG23/GR6
38 SG24/GR5
42 GR1
41 GR2
Grid
Driver
40 GR3
39 GR4
Pin No.
1 to 4
5
6
7
8
9
10, 11
12, 44
13, 43
14 to 29
30
31 to 38
39 to 42