Lexicon MPX550 Service Manual

345678

REVISIONS

DESCRIPTIONREV

1 CHANGED PER DCR 010316-00

INPUT AMPLIFIER

D

+15VA

J10

321

4

J11

LEFT INPUT

4

1
6
5
2

3

C

J13

J12

321

4

1
6
5
2

4

3

B

RIGHT INPUT

A

FB10

C49

150PF

C50

150PF

FB11

FB12

C51

150PF

C52

150PF

FB13

C98

10/25

C103

10/25

C129

10/25

C134

10/25

R71

13.0K
1%

R72

13.0K
1%

R98

13.0K
1%

R99

13.0K
1%

R69

13.0K

R74

13.0K

R96

13.0K

R101

13.0K

8

4580

5

+

7

6

-

U10

1%

1%

1%

C97

47PF -15VA

R68

1.50K

CW

CW

10K

R102

R95

1.50K

10K

C102

47PF

C128

47PF

INPUT

TRIM

R102

INPUT

TRIM

1%

C133

47PF

4

R70

10.0K

C96

1%

33PF

1%

3

2

1

C101

33PF

R73

8

4

-15VA

8

4

-15VA

8

4

-15VA

4580

U10

4580

U27

C127

33PF

C132

33PF

4580

U27

10.0K
1%

1

7

R97

10.0K
1%

R100

10.0K
1%

1

+15VA

2

-

3

+

+15VA

5

+

6

-

1%

7

6

5

+15VA

2

-

3

+

R65

1.00K
1%

R67

1.00K
1%

R92

1.00K
1%

R94

1.00K
1%

R64

174

1%

R66

174

1%

R91

174

1%

R93

174

1%

C94

47/16

C95

47/16

C125

47/16

C126

47/16

+5VA

+5VA

C106

2200PF

R63

10.0K
1%

R60

10.0K
1%

C112

2200PF

R90

10.0K
1%

R87

10.0K
1%

R61

1.00K
1%

R62

1.00K
1%

BIAS

C93C92

10/16 .1/25

R88

1.00K
1%

R89

1.00K
1%

BIAS

C123C124

10/16 .1/25

C109

10/16

C113

C115

10/16

.1/25

A/D CONVERTER

+5VA

FB15

C110

10/16

C111 C105

23

VA

4

AINL+

5

AINL-

1

VREFL+

C108

.1/25

2

C107

.1/25

GNDL

3

VCOML

26

VCOMR

28

VREFR+

C114

.1/25

27

GNDR

AINR+

25
24

AINR-

22

AGND

21 9

BGND CAL

20

TEST

8

DGND

45678

AK5383

SMODE2
SMODE1

C104

10/16

.1/25.1/25

VD

ZCAL

FSYNC

HPFE

DFS

SDATA

LRCK
SCLK
MCLK

RST/

7
6
16
19
11
12
18

15
13
14
17

10

U21

+5VA

NC

AD_DATA

R76

100

CK_64FS/

CK_FS/

AD_DATA
CK_FS/
CK_64FS_I/
CK_256FS_C

AD_CAL/

R75

47K

[3/B7]
[3/B7]
[3/B7]
[6/B2]

[4/C2]

32

2 CHANGED PER DCR 010515-00

CHANGED PER DCR 010829-00

3

4

CHANGED SHTS. 2, 4 & 7 PER DCR 010924-00

NOTES

1 UNLESS OTHERWISE INDICATED, RESISTORS ARE 1/10W
2 UNLESS OTHERWISE INDICATED, RESISTORS ARE 5%
3 UNLESS OTHERWISE INDICATED, CAPACITORS ARE UF/V

DIGITAL

4

GROUND
5 [XX/XX] DENOTES [SHEET NUMBER/SECTOR]
6 LAST REFERENCE DESIGNATORS USED: C134, D29, FB15, J20, Q1,

R102, RP13, SW4, U27, W2, Y2

7 COMPONENTS MARKED WITH ARE NOT POPULATED.

SHEET

REVISION

1 OF 8

8

2 OF

8

3 OF

8

4 OF

8

5 OF

8

6 OF

8

7 OF
8 OF

8

© 2001 Lexicon, Inc.

CONTRACT
NO.

DRAWN
CHECKED
Q.C.
ISSUED

RWH 3/2/01

ANALOG
GROUND

DOCUMENT CONTROL BLOCK: #060-14559

4

INPUT
DAC

4

LEXICHIP3, DRAM

3
4

uPROC, ROM/RAM, CS, RESET

3

ENCODERS

3

MIDI, DIGITAL AUDIO OUT

4

DISPLAY DRIVER

3

POWER SUPPLY

exicon

DATEAPPROVALS

JV

3/12/01

CW

3/14/01

JM

3/7/01

CHASSIS
GROUND

*

TITLE

TITLE

SCHEM, MAIN,MPX550

SIZE

B

FILE NAME

12

DRAFTER
CHECKER

RWH

3/16/01

JV

3/16/01

RWH

6/15/01

JV

6/26/01

RWH

9/7/01

ECM

9/11/01

RWH

9/28/01

ECM

9/28/01JM10/2/01

CHASSIS
SCREW

3 OAK PARK
BEDFORD, MA 01730

INPUT

NUMBERCODE

060-14559

.

114559-4 1

SHEET

Q.C.

AUTH.

CW

3/19/01

JM

3/16/01

CW

6/26/01

JM

6/18/01

CW

9/10/01

JM

9/7/01

JV

10/2/01

POWER
GROUND

OF

1

REV

4
8

D

C

B

A

3-12-2002_16:30

345678

REVISIONS

DESCRIPTIONREV

1 CHANGED PER DCR 010316-00

2 CHANGED PER DCR 010515-00

D

3 CHANGED PER DCR 010829-00

4

CHANGED PER DCR 010924-00

12

DRAFTER
CHECKER

RWH

3/16/01

JV

3/16/01

RWH

6/15/01

JV

6/26/01

9/7/01

ECM

9/11/01

RWH

9/28/01

ECM

9/28/01

Q.C.

AUTH.

CW

3/19/01

JM

3/16/01

CW

6/26/01

JM

6/18/01

CWRWH

9/10/01

JM

9/7/01

JV

10/2/01

JM

10/2/01

D

D/A CONVERTER

+5VA

FILTER / NON-INVERTING DRIVER

INVERTING DRIVER

R29

1

5.1

10/16 10/16

C43

C

.1/25

AK4393

2

CK_256FS_C

[6/B2]

AD_CAL/

[4/C2]

CK_64FS_O/

[3/B7]

DA_DATA

[3/B7]

CK_FS/

[3/B7]

DA_DATA

B

VD+

4

PD

5

BICK

6

SDATA

7

LRCK

8

SMUTE

9

DFS

10

DEM0

11

DEM1

12

DIF0

13

DIF1

14

DIF2

115

DGND BGND

C38C42

C40

.1/25

VA+

VREFHMCLK

AOUTL+

AOUTL-

CKS2
CKS1
CKS0

P/S

VCOM

AOUTR+

AOUTR-

AGND

VREFL

18
173
23
22
28
27
26
25
24
21
20
19
16

U6

R34

47

C41

.1/25

C39 C37

C48

3300/16

10/16.1/25

R28

2.15K
1%

R27

2.15K
1%

R40

2.15K
1%

R39

2.15K
1%

R21

R25

T

R26

C31

10.0K

4700PF

T

C30

4700PF

1%

R23

10.0K
1%

715
1%

R24

715
1%

T

T

C29

330PF

C28

330PF

5
6

+15VA

8

+

-

4

-15VA

4580

7

U4

DAL

R22

10.0K
1%

2
3

R20

10.0K
1%

+15VA

8

-

+

4

-15VA

C24

18PF

4580

1

U4

270

1/4W

R19

270

1/4W

FB6

FB7

C23 C25

150PF150PF

R32

R37

T

R38

C47

10.0K

4700PF

T

C45

4700PF

1%

R35

10.0K
1%

715
1%

R36

715
1%

T

T

C46

330PF

C44

330PF

5
6

+15VA

8

+

-

4

-15VA

4580

7

U5

DAR

R33

10.0K
1%

2
3

R31

10.0K
1%

+15VA

8

-

+

4

-15VA

C34

18PF

4580

1

U5

270

1/4W

R30

270

1/4W

FB8

FB9

C32 C33

150PF150PF

3

4

2

7

J6

1
6
5
2

3

J7

LEFT OUTPUT

4

1

3

4

2

7

C

J9

1
6
5
2

3

J8

B

RIGHT OUTPUT

4

OF

REV

4
8

A

3-12-2002_16:30

A

45678

32

CONTRACT
NO.

DRAWN
CHECKED
Q.C.
ISSUED

exicon

DATEAPPROVALS

3/2/01RWH

3/12/01JV

CW 3/14/01

3/7/01JM

3 OAK PARK
BEDFORD, MA 01730

TITLE

SCHEM, MAIN,MPX550

SIZE

B

FILE NAME

.

DAC

NUMBERCODE

060-14559

214559-4 2

SHEET

1

345678

+5VD

LXA0

NC
NC

WE

RAS

OE

UCAS

LCAS

NC
NC

GND
GND
GND

17

A0

LXA1

18

A1

LXA2

19

A2

LXA3

20

A3

LXA4

23

A4

LXA5

24

A5

LXA6

25

A6

LXA7

262

A7D0

LXA8

27

A8

LXA9

28

A9

16

NC

15

NC

13
14
29
30
31

NC

11

NC

12
22

37
42

LXA[9:0]

63 110RP1
27RP1 110

81 110RP1

+5VD

21

VCC

6

VCC

1

NC

VCC

3

D1

4

D2

5

D3

7

D4

8

D5

9

D6

10

D7

33

D8

34

D9

35

D10

36

D11

38

D12

39

D13

40

D14

41

D15

32

NC
70NS

1MX16

LXD[11:0]

D

+5VD +5VD +5VD

3

4

RP2

RP2
10K 10K 10K

6

5

2

RP2

7

+5VD

1

8

RP2
10K

LXD0
LXD1
LXD2
LXD3
LXD4
LXD5
LXD6
LXD7
LXD8
LXD9
LXD10
LXD11

1 CHANGED PER DCR 010316-00

2 CHANGED PER DCR 010515-00

3 CHANGED PER DCR 010829-00

U8

10

23 41 60 71 90

LXD0
LXD1
LXD2

5%

[6/C2]

LXD3
LXD4

LXD5
LXD6
LXD7

LXD8
LXD9
LXD10
LXD11

R47
680

ZD0
ZD1
ZD2
ZD3
ZD4
ZD5
ZD6
ZD7

C

+5VD

R53
10

C76

C78

.01/25

10/16

MIDI_IN

[5/D6][6/D5]

MIDI_OUT/THRU

[6/D5]

CK_FS_SP/

[6/B4]
[1/B2]

[2/C8]
[1/B2]
[2/C8]
[6/A4]
[6/B2]
[4/D6]

CK_FS/
AD_DATA
DA_DATA
CK_64FS_I/
CK_64FS_O/
CK_64FS_SP/
CK_256FS
LEX_SDIN1

[1/B2,2/C8]

B

24C32

1

A0

2

A1

3

A2

4

GND

4KX8

VCC

WP
SCL
SDA

U9

+5VD

8
7

6
5

+5VD +5VD

10K

1/10W

5%

R46R45

10K

1/10W

5%

EEPROM

[4/D3,4/A6,6/A8,7/B7]

+5VD

5

10K

1

RP11

8

RP10

4

ZD3

3

RP10

6

CONFIGURATION
RESISTORS

[4/C8,7/B7]

A

ZD[7:0]

ZD7 ZD6 ZD5 ZD4 ZD2 ZD1 ZD0

4

3

2

RP11

RP11

5

RP11

6

7

[4/A7]

2

RP10

7

45RP4 110
36RP5 110

54 110RP5
72 110RP5

18RP4 110

63 110RP4

RDBUF_LEXI3/
RESET/

1

RP10
10K10K10K10K10K10K10K

8

1N914

D6

+5VD

8

10K
RP3

1

100

C77 R50 10K

.01/25

R51

1/10W

EEPROM_DATA

NC

256FS48

NC

NC

NC

NC

1

XD_0

2

XD_1

3

XD_2

4

XD_3

5

M_A

(PIOA_0, XD_4)

6

M_B

(PIOA_1, XD_5)

7

M_C

(PIOA_2, XD_6)

9

M_D

(PIOA_3, XD_7)

11

M_E

(ADCMP_0,ADMX_0,XD_8)

12

M_F

(ADCMP_1,ADMX_1,XD_9)

13

M_G

(ADCMP_2,ADMX_2,XD_10)

14

M_H

(ADCMP_3,ADMX_3,XD_11)

15

M_J

(ADDIS, FSQOUT/)

75

(CLK_IN)

XTI

74

XTO

79

PLL_VDD

80

PLL_TSTVCO

81

PLL_VSS

82

PLL_TSTCP

77

M_MC

(MC_IN, MC_OUT)

84

(MIDI_IN,MCX2_IN, PLL_TSTRN)

M_T

85

(MIDI_THRU/, MIDI_OUT/, PLL_SYSCLK)

M_W

86

M_WC/

87

M_SDIN0

88

M_SDOUT0

89

M_X

(SCLK0, FS64OUT)

93

256FS_OUT

91

M_Y

(PIOB_0, SCLK1, ADCMP_3, FS128OUT)

94

M_Z

(PIOB_1, SFR1, FS256INB)

95

M_AA

(PIOB_2, SDIN1, ZREG3/)

97

M_AC

(PIOB_3, DO_CBL, XA_10)

98

M_AD

(PIOB_4, DO_U, DO_C, XA_11, 512FSIN)

53

M_Q

(PIOB_6,RP_1, ZBK_1, PCLK1)

54

M_R

(PIOA_6, ZBK_2, RP_2, ZREG2/)

55

M_S

(PIOA_7, FS256INB, ZBK_3, ZDEC2/)

56

ZD0

57

ZD1

59

ZD2

61

ZD3

62

ZD4

63

ZD5

64

ZD6

65

ZD7

100

MRST/

ROM_A17 ROM_A17
ROM_A16 ROM_A16

VCC VCCVCC VCC VCCVCC

LEXICHIP-3B

(PIOA_4, XA_9)

(PIOA_5, XCAS1/)

(WCIN/, WCOUT/)
(SDIN0, PLL_TSTCLK)
(SDOUT0, PLL_TSTOUT)

(ZDEC1/, SFR0, ADCMP_3)

(RP0, PCLK0, ZBK_0)

(RP3)
(RP4)
(RP5)
(RP6)
(RP7)

(ZCLK_IN, ZCLK_OUT)

(PIOB_7, DO_C, DO_U, SDOUT1, ZREG0/)

GND GND GND GND GND GND

82139587392

3

RP3

10K 10K

6

(PIOB_5, DIG_OUT, ZREG1/)

2

RP3

7

XA_0
XA_1
XA_2
XA_3
XA_4
XA_5
XA_6
XA_7
XA_8

M_K

M_L

XCAS0/

XRAS/

XWE/

ZA0
ZA1
ZA2
ZA3
ZA4
ZA5
ZA6
ZA7
ZA8

ZA9
ZA10
ZA11
ZA12
ZA13
ZA14
ZA15

ZDEC0/

M_N
M_P

M_ZRD/

M_ZWR/

M_ZMREQ/

M_ZIORQ/

M_ZM1/

ZINT/

ZWAIT/

ZRST/

M_ZCLK

M_AB
M_AE

LXA0

16

LXA1

17

LXA2

18

LXA3

19

LXA4

25

LXA5

26

LXA6

27

LXA7

28

LXA8

29

LXA9

30
31

NC
20
22
24

32

ZA0

33

ZA1

34

ZA2

35

ZA3

36

ZA4

37

ZA5

38

ZA6

40

ZA7

42

ZA8

43

ZA9

44

ZA10

45

ZA11

46

ZA12

47

ZA13

48

ZA14

49

ZA15

R44

1/10W

50

ROM_EN/ ROM_EN/

51

RAM_EN/ RAM_EN/

52

ROM_A15 ROM_A15

+5VD

10K

1/10W

1/10W

5%

ZRD/

66

ZWR/

67

ZMREQ/

68

ZIORQ/

69

ZM1/

70

ZINT/

78

ZWAIT/

83
76

72
96

99

10K

10K

+5VD+5VD

5

10K

R52R49R48

10K

1/10W

RP3

4

5%

5%

5%

U15

XREF1=[4/B6]

45678

32

ZA[15:0]

ZCTRL

ZRST_LEXI3/
ZCLK_LEXI3
CTL_REG/

SPDIF_OUT

[4/C8,7/B7]

[4/B6]
[4/B4]
[4/B6]

[4/B8,7/C7]

[4/A7]
[4/A7]
[4/C4]

[4/D8]

[4/B6]

CONTRACT
NO.

DRAWN
CHECKED
Q.C.
ISSUED

exicon

CW 3/14/01

REVISIONS

DESCRIPTIONREV

SPARES

45RP1 110

NC NC

27RP4 110

DATEAPPROVALS

3/2/01RWH

3/12/01JV

3/7/01JM

TITLE

SIZE

B

FILE NAME

14559-4 33

81 110RP5

SCHEM, MAIN,MPX550

12

DRAFTER
CHECKER

RWH

3/16/01

JV

3/16/01

RWH

6/15/01

JV

6/26/01

9/7/01

ECM

9/11/01

NCNC
NCNC

3 OAK PARK
BEDFORD, MA 01730

LEXICHIP3, DRAM

NUMBERCODE

060-14559

.

SHEET

Q.C.

AUTH.

CW

3/19/01

JM

3/16/01

CW

6/26/01

JM

6/18/01

CWRWH

9/10/01

JM

9/7/01

OF

1

REV

3
8

D

C

B

A

3-12-2002_16:30

345678

REVISIONS

74HC273

3

ZD0

1D

4

ZD1

2D

7

ZD2

3D

8

ZD3

4D

13

ZD4

5D

14

ZD5

74VHCT244

SPDIF_OUT

[3/A2]

SPDIF_MCLK

D

[6/B4]
[6/B4]

SPDIF_SDTO

11 9

A1 Y1

13

A2

15
17
19

Y2

A3

Y3

A4

Y4

G

7
5
3

NC

R54 120

U16

ENC_[7:0]

[5/B4]

74VHCT244

[6/A4]

SPDIF_ERF

218

A1 Y1

4

A2

6

A3

8

A4

1

G

ZD6

16

NC

Y2

14

NC

Y3

12

NC

Y4

U16

74VHCT32

READ_BUF/

[4/A6]

[3/C3,7/B7]

C

[3/A8,7/B7]

ZA[15:0]

ZD[7:0]

ZA2

1

3

2

U7

SPDIF_OUT_B
SP_MCLK
LEX_SDIN1

ENC_0
ENC_1
ENC_2
ENC_3
ENC_4
ENC_5
ENC_6
ENC_7

ZA0

2
3
4
5
6
7
8
9
1

19

[6/C8]
[6/B4]
[3/B7]

74HC541

A1
A2
A3
A4
A5
A6
A7
A8
1G
2G

[3/A2]

RESET/

CTL_REG/

[3/B7,4/A6,6/A8,7/B7]

ZA1

2
3
4
5
6
7
8
9
1

19

74HC541

A1
A2
A3
A4
A5
A6
A7
A8
1G
2G

18

ZD0

Y1

17

ZD1

Y2

16

ZD2

Y3

15

ZD3

Y4

14

ZD4

Y5

13

ZD5

Y6

ZD6

12

Y7

ZD7

11

Y8

U11

ZD0

18

Y1

ZD1

17

Y2

ZD2

16

Y3

ZD3

15

Y4

ZD4

14

Y5

ZD5

13

Y6

ZD6

12

Y7

ZD7

11

Y8

[7/D4]
[7/D4]
[7/B2]

FOOT_TAP/
FOOT_BYPASS/
PROGA
PROGB

U26

ZA3

10

CTL_REG/

74VHCT32

9

U7

8

ZD6
ZD7

ZD0
ZD1
ZD2
ZD3
ZD4
ZD5
ZD6
ZD7

17
18
11

1

11

1

6D
7D
8D
CLK
CLR

74AC273

CLK

CLR

2

1Q

5

2Q

6

3Q

9

4Q

12

5Q

15

6Q

16

7Q

19

8Q

U25

23

1Q1D

54

2Q2D

67

3Q3D

98

4Q4D

1213

5Q5D

1514

6Q6D

1617

7Q7D

1918

8Q8D

U22

LCD0
LCD1
ADJ12_SELECT/
ADJ34_SELECT/
CLK_SEL0
CLK_SEL1
DPOT_U/D
DPOT_CS

R80 270
R79 270
R78 270
R85 270
R86 270
R77 270

10KR81

1/10W

5%

[4/A7]
[4/A7]
[5/C8]
[5/A8]
[6/B4]
[6/B4]
[7/C8]
[7/C8]

DPOT_INC/
TAP_LED/
LOAD_LED/
BYPASS_LED/
EDIT_LED/
SYSTEM_LED/
STORE_LED/
AD_CAL/
SWITCH_SELECT/

[7/C8]
[7/C5]
[7/C5]
[7/C5]
[7/B5]
[7/B5]
[7/C5]
[1/B2,2/C8]
[7/B5][7/B2]

1 CHANGED PER DCR 010316-00

2 CHANGED PER DCR 010515-00

3 CHANGED PER DCR 010829-00

CHANGED PER DCR 010924-004

DESCRIPTIONREV

12

DRAFTER
CHECKER

RWH

3/16/01

JV

3/16/01

RWH

6/15/01

JV

6/26/01

RWH

9/7/01

ECM

9/11/01

RWH

9/28/01

ECM

9/28/01

Q.C.

AUTH.

CW

3/19/01

JM

3/16/01

CW

6/26/01

JM

6/18/01

CW

9/10/01

JM

9/7/01

JV

10/2/01

JM

10/2/01

D

C

+5VD

Z80C-10

10MHZ

6
ZA0
ZA1
ZA2
ZA3
ZA4
ZA5
ZA6
ZA7
ZA8
ZA9
ZA10
ZA11

+5VD

ZA12
ZA13
ZA14
ZA15

ZCLK

B

[4/A6]
[4/A6]

ZRST/

ZINT/
ZWAIT/

28
29
30
31
32
34
35
36
37
38
40
41
42
43
44
22
13

1

23
12

21
26

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
BUSREQ
NMI

CLK

RST
INT

WAIT
GND

D0
D1
D2
D3
D4
D5
D6
D7

NC
NC
NC
NC

RFSH

BUSACK

HALT

M1

MREQ

IORQ

RD

WR

VCC

27

9
10
7
3
2
4
5
8

11
17
33
39
25
20
14

24
15
16
18
19

U14

NC
NC
NC
NC
NC
NC
NC

ZD0
ZD1
ZD2
ZD3
ZD4
ZD5
ZD6
ZD7

ZM1/

ZMREQ/

ZIORQ/

ZRD/

ZWR/

[3/B2]
[3/A2]
[3/A2]

[3/B2]

ROM_A15
ROM_A16
ROM_A17

ROM_EN/

+5VD

R43

0

R42

0

*

+5VD

ZA0
ZA1
ZA2
ZA3
ZA4
ZA5
ZA6
ZA7
ZA8
ZA9
ZA10
ZA11
ZA12
ZA13
ZA14

ZRD/

12
11
10

27
26
23
25

28
29

30

31
24
22
16

9
8
7
6
5

4

3
2

1

27C020

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17

256KX8

NC1
WR
OE
CE
GND

VCC
DQ0

DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7

70NS

32
13

14
15
17
18
19
20
21

U13

+5VD

ZD0
ZD1
ZD2
ZD3
ZD4
ZD5
ZD6
ZD7

[3/B2]

RAM_EN/

ZA0
ZA1
ZA2
ZA3
ZA4
ZA5
ZA6
ZA7
ZA8
ZA9
ZA10
ZA11
ZA12
ZA13
ZA14

ZWR/
ZRD/

43256

10

A0

9

A1

8

A2

7

A3

6

A4

5

A5

4

A6

3

A7

25

A8

24

A9

21

A10

23

A11

2

A12

26

A13

1

A14

27

WE

20

CE

22

OE

14

GND

VCC

+5VD

28

11
12
13
15
16
17
18
19

32KX8
70NS

ZD0
ZD1
ZD2
ZD3
ZD4
ZD5
ZD6
ZD7

D0
D1
D2
D3
D4
D5
D6
D7

SPARES

U2

NC

U12

74VHCT14

74VHCT32

4
5

1011

NC

6

B

U7

74VHCT32

12

11

13

NC

U7

[3/B3,7/C7]

A

ZCTRL

+5VD

R13

1K

C12

22/16

PBRESET+

D2

1N914

U2

74VHCT14

+5VD

NC

GAL16V8R-25

2

I

VCC

3

I

4

I

5

I

6

I

7

I

8

I

9

I

11

OE

1

CK

10

GND

20
12

I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

U23

NC
13
14
15
16
17
18
19

ZCLK

89

[3/A2]
[4/D3]
[4/D3]

[3/A2]
[3/B7]

[6/C2]

ZIORQ/
ZCLK_LEXI3
LCD0
LCD1

ZRST_LEXI3/
RDBUF_LEXI3/

256FS48

RESET/

CK_3MHZ
SEL_LCD1
SEL_LCD2
SEL_LCD3
ZCLK
ZRST/
READ_BUF/

ZRESET/

RESET GENERATOR

[3/B7,4/D3,6/A8,7/B7]

[7/B7]
[7/B7]
[7/B7]
[7/B7]
[4/B8]
[4/B8]
[4/C8]

OF

REV

4

A

3-12-2002_16:30

CONTRACT
NO.

DRAWN
CHECKED
Q.C.
ISSUED

45678

32

exicon

DATEAPPROVALS

3/2/01RWH

3/12/01JV

CW 3/14/01

3/7/01JM

3 OAK PARK
BEDFORD, MA 01730

TITLE

SCHEM, MAIN,MPX550

uPROC, ROM/RAM, CS, RESET

SIZE

B

FILE NAME

NUMBERCODE

060-14559

.8

414559-4 4

SHEET

1

345678

REVISIONS

DESCRIPTIONREV

1 CHANGED PER DCR 010316-00

2 CHANGED PER DCR 010515-00

D

PROGRAM EDIT 1

6

7

1

1

2

2

3

4

4

8

5

C

D24 1N914
D26 1N914

D25 1N914
D27 1N914

+5VD

2

3

4

RP12
10K 10K 10K 10K

5

RP12

6

RP12

7

1

RP12

8

ENC_0
ENC_1
ENC_2
ENC_3

3 CHANGED PER DCR 010829-00

12

DRAFTER
CHECKER

RWH

3/16/01

JV

3/16/01

RWH

6/15/01

JV

6/26/01

9/7/01

ECM

9/11/01

Q.C.

AUTH.

CW

3/19/01

JM

3/16/01

CW

6/26/01

JM

6/18/01

CWRWH

9/10/01

JM

9/7/01

D

SW4

+5VD

ADJ12_SELECT/

3

RP13

6

2

RP13

7

1

RP13
10K10K 10K10K

8

ENC_4
ENC_5
ENC_6
ENC_7

ENC_0
ENC_1
ENC_2
ENC_3

ENC_0

ENC_1

ENC_2

ENC_3

ENC_4

ENC_5

ENC_6

1N914

D11

1N914

D10

1N914

D9

1N914

D29

1N914

D28

1N914

D8

1N914

D7

TAP_SWITCH/

LOAD_SWITCH/

BYPASS_SWITCH/

EDIT_SWITCH/

SYSTEM_SWITCH/

STORE_SWITCH/

BANK_SWITCH/

[7/C5]

[7/B5]

[7/B5]

[7/A5]

[7/A5]

[7/B5]

[7/B5]

C

B

PROGRAM EDIT 2

C

6

7

1

1

2

2

3

4

4

8

5

C

D20 1N914
D22 1N914

D21 1N914
D23 1N914

4

RP13

5

SW3

ADJ12_SELECT/

[4/D3]

PROGRAM EDIT 3

6

7

SW2

1

1

2

2

3

4

4

8

5

C

D16 1N914
D18 1N914

D17 1N914
D19 1N914

B

ADJ34_SELECT/

PROGRAM EDIT 4

6

7

1

1

2

2

3

4

4

8

5

C

D12
D14

1N914
1N914

D13
D15

1N914
1N914

SW1

ADJ34_SELECT/

[4/D3]

A

ENC_4
ENC_5
ENC_6
ENC_7

ENC_[7:0]

45678

[4/D7]

CONTRACT
NO.

DRAWN
CHECKED
Q.C.
ISSUED

exicon

DATEAPPROVALS

3/2/01RWH

3/12/01JV

CW 3/14/01

3/7/01JM

TITLE

SIZE

B

FILE NAME

32

3 OAK PARK
BEDFORD, MA 01730

SCHEM, MAIN,MPX550

ENCODERS

NUMBERCODE

060-14559 3

.

SHEET

1

A

REV

8

514559-4 5

OF

3-12-2002_16:30