Table of Contents
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1
2
U15
74LCX2245
DLY1D[23]
18
2
BDLY1D[23]
B[1]
A[1]
DLY1D[22]
17
3
BDLY1D[22]
B[2]
A[2]
DLY1D[21]
16
4
BDLY1D[21]
B[3]
A[3]
DLY1D[20]
15
5
BDLY1D[20]
B[4]
A[4]
DLY1D[19]
14
6
BDLY1D[19]
+3
B[5]
A[5]
DLY1D[18]
13
7
BDLY1D[18]
B[6]
A[6]
DLY1D[17]
12
8
BDLY1D[17]
B[7]
A[7]
DLY1D[16]
11
9
BDLY1D[16]
B[8]
A[8]
A
20
10
VCC
GND
DIR
G
U16
74LCX2245
DLY1D[15]
18
2
BDLY1D[15]
B[1]
A[1]
DLY1D[14]
17
3
BDLY1D[14]
B[2]
A[2]
DLY1D[13]
16
4
BDLY1D[13]
B[3]
A[3]
DLY1D[12]
15
5
BDLY1D[12]
B[4]
A[4]
DLY1D[11]
14
6
BDLY1D[11]
B[5]
A[5]
DLY1D[10]
13
7
BDLY1D[10]
B[6]
A[6]
DLY1D[09]
12
8
BDLY1D[09]
B[7]
A[7]
DLY1D[08]
11
9
BDLY1D[08]
B[8]
A[8]
20
10
VCC
GND
DIR
G
U17
74LCX2245
DLY1D[07]
18
2
BDLY1D[07]
B[1]
A[1]
DLY1D[06]
17
3
BDLY1D[06]
B[2]
A[2]
DLY1D[05]
16
4
BDLY1D[05]
B
B[3]
A[3]
DLY1D[04]
15
5
BDLY1D[04]
B[4]
A[4]
DLY1D[03]
14
6
BDLY1D[03]
B[5]
A[5]
DLY1D[02]
13
7
BDLY1D[02]
B[6]
A[6]
DLY1D[01]
12
8
BDLY1D[01]
B[7]
A[7]
DLY1D[00]
11
9
BDLY1D[00]
B[8]
A[8]
20
10
VCC
GND
DIR
G
L1W {2-A8}
L1CAS {2-A8}
DLY1D[23:00] {2-A8}
U18
DLY2D[23:00] {2-A8}
74LCX2245
DLY2D[23]
18
2
BDLY2D[23]
B[1]
A[1]
DLY2D[22]
17
3
BDLY2D[22]
B[2]
A[2]
DLY2D[21]
16
4
BDLY2D[21]
B[3]
A[3]
DLY2D[20]
15
5
BDLY2D[20]
B[4]
A[4]
DLY2D[19]
14
6
BDLY2D[19]
B[5]
A[5]
+3
DLY2D[18]
13
7
BDLY2D[18]
B[6]
A[6]
DLY2D[17]
12
8
BDLY2D[17]
B[7]
A[7]
DLY2D[16]
11
9
BDLY2D[16]
B[8]
A[8]
20
10
VCC
GND
DIR
G
C
U19
74LCX2245
DLY2D[15]
18
2
BDLY2D[15]
B[1]
A[1]
DLY2D[14]
17
3
BDLY2D[14]
B[2]
A[2]
DLY2D[13]
16
4
BDLY2D[13]
B[3]
A[3]
DLY2D[12]
15
5
BDLY2D[12]
B[4]
A[4]
DLY2D[11]
14
6
BDLY2D[11]
B[5]
A[5]
DLY2D[10]
13
7
BDLY2D[10]
B[6]
A[6]
DLY2D[09]
12
8
BDLY2D[09]
B[7]
A[7]
DLY2D[08]
11
9
BDLY2D[08]
B[8]
A[8]
20
10
VCC
GND
DIR
G
U20
74LCX2245
DLY2D[07]
18
2
BDLY2D[07]
B[1]
A[1]
DLY2D[06]
17
3
BDLY2D[06]
B[2]
A[2]
DLY2D[05]
16
4
BDLY2D[05]
B[3]
A[3]
DLY2D[04]
15
5
BDLY2D[04]
B[4]
A[4]
DLY2D[03]
14
6
BDLY2D[03]
B[5]
A[5]
DLY2D[02]
13
7
BDLY2D[02]
B[6]
A[6]
D
DLY2D[01]
12
8
BDLY2D[01]
B[7]
A[7]
DLY2D[00]
11
9
BDLY2D[00]
B[8]
A[8]
20
10
VCC
GND
DIR
G
L2W {2-A8}
L2CAS {2-A8}
DLY1A[09:00] {2-A8}
DLY2A[09:00] {2-A8}
1
2
DSP Board–DRAM 3/5V Addr/Data Buffers (3 of 5)
3
4
RP1
47
DLY1D[23]
8
1
BDLY1D[23]
DLY1D[22]
7
2
BDLY1D[22]
DLY1D[21]
6
3
BDLY1D[21]
DLY1D[20]
5
4
BDLY1D[20]
DLY1D[19]
8
1
BDLY1D[19]
DLY1D[18]
7
2
BDLY1D[18]
DLY1D[17]
6
3
BDLY1D[17]
DLY1D[16]
5
4
BDLY1D[16]
RP2
47
DLY1A[09:00]
RP3
47
DLY1D[15]
8
1
BDLY1D[15]
DLY1D[14]
7
2
BDLY1D[14]
DLY1D[13]
6
3
BDLY1D[13]
DLY1D[12]
5
4
BDLY1D[12]
DLY1D[11]
8
1
BDLY1D[11]
DLY1D[10]
7
2
BDLY1D[10]
DLY1D[09]
6
3
BDLY1D[09]
DLY1D[08]
5
4
BDLY1D[08]
RP4
47
RP5
47
DLY1D[07]
8
1
BDLY1D[07]
DLY1D[06]
7
2
BDLY1D[06]
DLY1D[05]
6
3
BDLY1D[05]
DLY1D[04]
5
4
BDLY1D[04]
DLY1D[03]
8
1
BDLY1D[03]
DLY1D[02]
7
2
BDLY1D[02]
DLY1D[01]
6
3
BDLY1D[01]
DLY1D[00]
5
4
BDLY1D[00]
RP6
47
RP7
47
DLY2D[23]
8
1
BDLY2D[23]
DLY2D[22]
7
2
BDLY2D[22]
DLY2D[21]
6
3
BDLY2D[21]
DLY2D[20]
5
4
BDLY2D[20]
DLY2D[19]
8
1
BDLY2D[19]
DLY2D[18]
7
2
BDLY2D[18]
DLY2D[17]
6
3
BDLY2D[17]
DLY2D[16]
5
4
BDLY2D[16]
RP8
47
RP9
47
DLY2D[15]
8
1
BDLY2D[15]
DLY2D[14]
7
2
BDLY2D[14]
DLY2D[13]
6
3
BDLY2D[13]
DLY2D[12]
5
4
BDLY2D[12]
DLY2D[11]
8
1
BDLY2D[11]
DLY2D[10]
7
2
BDLY2D[10]
DLY2D[09]
6
3
BDLY2D[09]
DLY2D[08]
5
4
BDLY2D[08]
RP10
47
RP11
47
DLY2D[07]
8
1
BDLY2D[07]
DLY2D[06]
7
2
BDLY2D[06]
DLY2D[05]
6
3
BDLY2D[05]
DLY2D[04]
5
4
BDLY2D[04]
DLY2D[03]
8
1
BDLY2D[03]
DLY2D[02]
7
2
BDLY2D[02]
DLY2D[01]
6
3
BDLY2D[01]
DLY2D[00]
5
4
BDLY2D[00]
RP12
47
The resistor packs are not used for +3.3V DRAM.
The 74LCX2245s are not used for 5.0V DRAMs.
74LCX245s cannot be substituted for 74LCX2245s.
3
4
5
6
U21
74LCX2245
DLY1A[09]
18
2
BDLY1A[09]
B[1]
A[1]
DLY1A[08]
17
3
BDLY1A[08]
B[2]
A[2]
DLY1A[07]
16
4
BDLY1A[07]
B[3]
A[3]
DLY1A[06]
15
5
BDLY1A[06]
B[4]
A[4]
DLY1A[05]
14
6
BDLY1A[05]
B[5]
A[5]
DLY1A[04]
13
7
BDLY1A[04]
B[6]
A[6]
DLY1A[03]
12
8
BDLY1A[03]
B[7]
A[7]
DLY1A[02]
11
9
BDLY1A[02]
B[8]
A[8]
20
10
VCC
GND
DIR
G
+3
U22
74LCX2245
DLY1A[01]
18
2
BDLY1A[01]
B[1]
A[1]
DLY1A[00]
17
3
BDLY1A[00]
B[2]
A[2]
DLY2A[09]
16
4
BDLY2A[09]
R72
B[3]
A[3]
DLY2A[08]
15
5
BDLY2A[08]
1K
B[4]
A[4]
DLY2A[07]
14
6
BDLY2A[07]
B[5]
A[5]
DLY2A[06]
13
7
BDLY2A[06]
B[6]
A[6]
DLY2A[05]
12
8
BDLY2A[05]
B[7]
A[7]
DLY2A[04]
11
9
BDLY2A[04]
B[8]
A[8]
20
10
VCC
GND
DIR
G
U23
74LCX2245
DLY2A[03]
18
2
BDLY2A[03]
B[1]
A[1]
DLY2A[02]
17
3
BDLY2A[02]
B[2]
A[2]
DLY2A[01]
16
4
BDLY2A[01]
B[3]
A[3]
DLY2A[00]
15
5
BDLY2A[00]
B[4]
A[4]
14
6
BSPR[05]
B[5]
A[5]
TP1
13
7
BSPR[04]
B[6]
A[6]
TP2
12
8
BSPR[03]
B[7]
A[7]
TP3
11
9
BSPR[02]
B[8]
A[8]
TP4
20
10
VCC
GND
DIR
G
U24
74LCX2245
18
2
BSPR[01]
B[1]
A[1]
TP5
17
3
BSPR[00]
B[2]
A[2]
TP6
16
4
L1CAS {2-A8}
L1CAS {2-A8}
B[3]
A[3]
BL1CAS {4-A1}
15
5
L1RAS {2-A8}
L1RAS {2-A8}
B[4]
A[4]
BL1RAS {4-A1}
14
6
L1W {2-A8}
B[5]
A[5]
BL1W {4-A1}
13
7
L2CAS {2-A8}
L2CAS {2-A8}
B[6]
A[6]
BL2CAS {4-B1}
12
8
L2RAS {2-A8}
L2RAS {2-A8}
B[7]
A[7]
BL2RAS {4-B1}
11
9
L2W {2-A8}
B[8]
A[8]
BL2W {4-C1}
20
10
VCC
GND
DIR
G
R71
1K
5
6
Kurzweil K2600 Series Service Manual
7
BDLY1D[23:00] {4-A8}
BDLY2D[23:00] {4-B8}
BDLY1A[09:00]
BDLY1A[09:00] {4-B1}
BDLY2A[09:00]
BDLY2A[09:00] {4-D1}
RP13
47
DLY1A[09]
8
1
BDLY1A[09]
DLY1A[08]
7
2
BDLY1A[08]
DLY1A[07]
6
3
BDLY1A[07]
DLY1A[06]
5
4
BDLY1A[06]
DLY1A[05]
8
1
BDLY1A[05]
DLY1A[04]
7
2
BDLY1A[04]
DLY1A[03]
6
3
BDLY1A[03]
DLY1A[02]
5
4
BDLY1A[02]
RP14
47
RP15
47
DLY1A[01]
8
1
BDLY1A[01]
DLY1A[00]
7
2
BDLY1A[00]
DLY2A[09]
6
3
BDLY2A[09]
DLY2A[08]
5
4
BDLY2A[08]
DLY2A[07]
8
1
BDLY2A[07]
DLY2A[06]
7
2
BDLY2A[06]
DLY2A[05]
6
3
BDLY2A[05]
DLY2A[04]
5
4
BDLY2A[04]
RP16
47
RP17
47
DLY2A[03]
8
1
BDLY2A[03]
DLY2A[02]
7
2
BDLY2A[02]
DLY2A[01]
6
3
BDLY2A[01]
DLY2A[00]
5
4
BDLY2A[00]
RP18
47
8
1
BL1CAS {4-A1}
7
2
BL1RAS {4-A1}
6
3
L1W {2-A8}
BL1W {4-A1}
5
4
BL2CAS {4-B1}
8
1
BL2RAS {4-B1}
7
2
L2W {2-A8}
BL2W {4-C1}
6
3
5
4
RP19
47
+3
+3
+3
+3
+3
C83
C85
C72
C74
C76
.1uF
.1uF
.1uF
.1uF
.1uF
YOUNG CHANG CO., LTD.
Reproduction without the express written consent
+3
+3
+3
+3
+3
of Young Chang Co., Ltd. is prohibited.
C84
C86
C73
C75
C77
K2600 DSP Engine
.1uF
.1uF
.1uF
.1uF
.1uF
DRAM 3/5V Address/Data Buffers
Filename:
021205C0
Eng:
Mfg:
Doc:
021205
7
8
A
B
C
D
Date:
8/4/99
By:
Mike Richmond
Sht
03
of
05
Rev:
RCV0
8
7-13
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