Circuit Description - Kenwood DV-502 Service Manual

2-4 DC Motor Driver : KA8082(ICM21)
Pin No. Pin Name I/O
1 GND -
2 VO1 O
3 VCTL I
4 VIN1 I
5 VIN2 I
6 SVCC -
7 PVCC -
8 VO2 O
2-5 HEX Inverter (Single Stage) : M74HCU04(IC501)
Pin No. Pin Name I/O
1,3,5,9
A0 to A5 I
11,13
2,4,6,8
Q0 to Q5 O
10,12
7 GND -
14 VCC -
2-6 Flash Memory : M29W800AT(IC401)
Pin No. Pin Name
25, 24~16, 8~1 A0~A18
29,31,33,35
DQ0~DQ7
38,40,42,44
30,32,34,36
DQ8~DQ14
39,41,43
45
26
28
11
12
15 RY/BY
47
37
27,46

CIRCUIT DESCRIPTION

Description
Ground
Output 1
Motor speed control
Input 1
Input 2
Supply voltage (Signal)
Supply voltage (Power)
Output 2
Description
Data Inputs
Data Outputs
Ground
Positive Supply Voltage
I/O
I Address Inputs
I/O Data Input/Outputs, Command Inputs
I/O Data Input/Outputs
DQ15 I/O Data Input/Outputs or Address input
CE - Chip Enable
QE - Output Enable
WE - Write Enable
RP - Reset/Block Temporary Unprotect
O Ready/Busy/Output
BYTE - Byte/Word Organization
VCC - Supply Voltage
VSS - Ground
DV-502/503/DVF-3050/3550
Internal Block Diagram
GND 1
DRIVER OUT
VO1 2
PRE DRIVER
VCTL 3
LOGIC SWITCH
VIN1 4
Truth Table
A
L
H
Description
8 V02
7 PVCC
TSD BIAS 6 SVCC
5 VIN2
Q
H
L
9