IC BLOCK DIAGRAM & DESCRIPTION
IC471,491 KIA2058,NJM4558M(Operational Amplifier)IC601 PT6315 (VFD Driver/Controller)
14SG1/KS1
15SG2/KS2
16SG3/KS3
Control17SG4/KS4
A OUTPUT 114D OUTPUT
DIN 718SG5/KS5
DOUT 6Serial19SG6/KS6
ADDataCLK 8Segment20SG7/KS7
InterfaceDisplay Memory
Driver
(24 bits x 17 Words)21SG8/KS8
A INPUT 213D INPUTSTB 9
Grid22SG9/KS9
Driver23SG10/KS10
24SG11/KS11
Key Scan
Output25SG12/KS12
A +INPUT 312D+INPUTOSC 5OSCTI~inc Generator26SG13/KS13
27SG14/KS14
28SG15/KS15
30SG16/KS16
V+ 411V31SG17/GR12
Key Moter Memory
32SG18/GR11
33SG19/GR10
34SG20/GR9
B+INPUT 510 C+INPUT35SG21/GR8
36SG22/GR7
LED1 137SG23/GR6
LED2 2LED38SG24/GR5
Driver
B INPUT69 C INPUTLED3 3
LED4 442GR1
BCGrid41GR2
Driving CircuitDriver40GR3
39GR4
B OUTPUT 78C OUTPUT
10111330
K1K2VDD GND VEE
IC462,472 LM1876 (Dual 20W audio Power Amplifier)
Pin NameI/ODescriptionPin No.
LED1 to LED4OLED Output Pin1 to 4
Vcc
15Vcc B
AOscillator Input Pin
14Standby BOSCIA resistor is connected to this pin to5
13+ In B2determinc the oscillation frequency
12- In B
Data Output Pin (N-Channel, Open-Drain)
11Mute BDOUTOThis pin outputs scrial data at the falling6
10GND B+In A 8cdge of the shift clock (starting from the lower bit)
9Standby A
8+ In AAmp A3Out ADINData Input Pin
7- In A(Schmitt Trigger)IThis pin inputs serial data at the rising cdgeof the shift clock (starting from the lower bit)7
6Mute A-In A 7
LM18765GND AClock Input Pin
4VEECLKIThis pin reads serial data at the rising cdge(Schmitt Trigger)and outputs data at the falling cdge.8
3Out A45
2VCC ASerial Interface Strobe Pin
1Out BVEEGNDSTBThe data input after the STB has fallen isI9
A(Schmitt Trigger)processed as a command.
When this pin "HIGH",CLK is ignored,
Key Data Input Pins
K1 to K2IThe data inputted to these pins are fatched10, 11
IC482 LM4700TF (30w audio Power Amplifier)at the end of the display cycle.
VSS-Logic Ground Pin12, 44
VDD-Logic Power Supply13, 43
SG1/KS1 to SG16/KS16OHigh-Voltage Segment Output PinsAlso acts as the Key Source14 to 29
11STANDBY
VccVEE-Pull-Down Level30
10VIN+
1
9VIN-SG17/GR12 to SG24/GR5OHigh Voltage Segment/Grid Output Pins31 to 38
8MUTEGR4 to GR1OHigh-Voltage Grid Output Pins39 to 42
7GNDVIN+ 10
6NC3OUTPUT
5NC
VIN- 9
LM47004VEE
3OUTPUT
2NC
47
1VCC
VEEGND
IC483 LM3876TF (56w audio Power Amplifier)
11NCV+
10VIN+1
9VIN-
8MUTE
7GNDVIN+ 10
6NC3OUTPUT
5NC (+)VIN- 9
LM38764V-
3OUTPUT
2NC74
1V+GNDV-
- 29 - |
ACEC
SANYO
