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5

4

3

2

1

D

D

J2 XLR FEMALE J1 PHONO

2 5 4 1 3 6 1 2

R1 1M

1

2

J24 CON2 R2 619 D1 MMSZ5242 +16.5V 6 4 8 6 4 8 +12V1 11 13 11 13 1 R11 169 K1 TX2-12V 3 16 D4 MMBD914 R14 619 K2 TX2-12V 1 PHASE1 1 9 1 3 16 C6 47uF/63VZ D6 MMBD914 + R12 10K D5 MMSZ5242 +12V1 D3 MMSZ5242 C5 220pF 4 13 2 C3 47uF/63VZ + R3 10K D2 MMSZ5242 5 +16.5V R4 4.99K J22 CON2 1 2 R5 10 2 C1 100uF/25V R8 100 C2 100pF R9 100 EQ1A EQ1B C4 100pF

+48V

6 5 4 3 2 1 SW1 MTH-2U

R6 169

R7 6.81K/0.1%

R10 6.81K/0.1%

3

+ -

11 U1 SSM2017S

3 1

Q1A 2N5564/65/66 +16.5V R13 169 TP1 TESTPOINT 3 5 2 Q1B 2N5564/65/66 4 R21 121 1 R16 20K

4

C7 100uF/63V

7 15

9

+16.5V R15 301 4 + 11 1 U2A MC33079 0% 7 R17 1K R18 301K 5 6 + 11

-16.5V

7 U2B MC33079 0% 10 R19 1K

6

PAD1

C

TP2 TESTPOINT R22 10K

-16.5V 8 C9 0.47uF/25V

C

-16.5V RV1C B10K/C10K C10 0.47uF/25V R23 1K -16.5V -16.5V 11 9 11

VR1 LM317LZ

RV1D B10K/C10K 12 R24 1K R29 1M

RV2 100/10T ADJ VOUT 2 R25 243 +12V1 C11 10uF/25V 3

2

+16.5V

3

VIN

R26 10

C12 100uF/25V

9 10 R30 1M C13 0.47uF/25V

4

+16.5V +16.5V

J3 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD1 PHASE1

B

Presence
-16.5V -16.5V EQ1A C17 47pF -16.5V 11 R36 78.7K R32 100 C15 0.01uF 1 2 3 4 5 3 6 R35 200K RV1A B10K/C10K 1 0% R38 4.99K R42 3.32K C18 0.1uF C16 0.1uF R33 4.99K R34 4.99K 7 8 -16.5V 2 3 2 R39 1K R37 26.7K +16.5V -16.5V 4 U3B TL084 7 Q3 MMBT3904 3 2 1 R41 1M 3 -16.5V C20 47pF 11 +16.5V C21 0.1uF GND R46 150K -16.5V C33 47pF +16.5V C27 0.1uF C28 10uF/25V C29 0.1uF C30 10uF/25V C31 0.1uF C32 10uF/25V C22 10uF/25V C23 0.1uF C24 10uF/25V C25 0.1uF C26 10uF/25V +16.5V 11 R40 20K 1 U3A TL084 4 EQ1B

4

Positive Limit

SW2 SPUJ12L-2

Negative Limit

R43 10K

U3C TL084 4

11

R44 10K

-16.5V +16.5V R47 10K R45 2K 14 U3D TL084

1

A

ANTI-LOG Generator

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C19 0.1uF

9 10

2

Q2 MMBT3904

13 12

Title

DIGIMAX Microphone Pre-Amp Channel 1
Size C Date:
3 2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

+

+

-16.5V

14

-

R28 1.91K

8

11 13 12 R31 1M

U2C MC33079

R27 1M -

1

U2D MC33079

C14 0.47uF/25V

B

+

A

Rev A Sheet 1 of 9

5

4

3

2

1

D

D

J5 XLR FEMALE J4 PHONO

2 5 4 1 3 6 1 2

R48 1M

1

2

J25 CON2 R49 619 D7 MMSZ5242 +16.5V 6 4 8 6 4 8 +12V2 11 13 11 13 1 R58 169 K3 TX2-12V 3 16 D10 MMBD914 R61 619 K4 TX2-12V 1 PHASE2 1 9 1 3 16 C39 47uF/63VZ D12 MMBD914 + R59 10K D11 MMSZ5242 +12V2 D9 MMSZ5242 C38 220pF 4 13 2 C36 47uF/63VZ + R50 10K D8 MMSZ5242 5 +16.5V R51 4.99K J23 CON2 1 2 R52 10 2 C34 100uF/25V R55 100 C35 100pF R56 100 EQ2A EQ2B C37 100pF

+48V

6 5 4 3 2 1 SW3 MTH-2U

R53 169

R54 6.81K/0.1%

R57 6.81K/0.1%

3

+ -

11 U4 SSM2017S

3 1

Q4A 2N5564/65/66 +16.5V R60 169 TP3 TESTPOINT 3 5 2 Q4B 2N5564/65/66 4 R68 121 1 R63 20K

4

C40 100uF/63V

7 15

9

+16.5V R62 301 4 + 11 1 U5A MC33079 0% 7 R64 1K R65 301K 5 6 + 11

-16.5V

7 U5B MC33079 0% 10 R66 1K

6

PAD2

C

TP4 TESTPOINT R69 10K

-16.5V 8 C42 0.47uF/25V

C

-16.5V RV3C B10K/C10K C43 0.47uF/25V R70 1K -16.5V -16.5V 11 9 11

VR2 LM317LZ

RV3D B10K/C10K 12 R71 1K R76 1M

RV4 100/10T ADJ VOUT 2 R72 243 +12V2 C44 10uF/25V 3

2

+16.5V

3

VIN

R73 10

C45 100uF/25V

9 10 R77 1M C46 0.47uF/25V

4

+16.5V +16.5V

J6 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD2 PHASE2

B

Presence
-16.5V -16.5V EQ2A C50 47pF -16.5V 11 R83 78.7K R79 100 C48 0.01uF 1 2 3 4 5 3 6 R82 200K RV3A B10K/C10K 1 0% R85 4.99K R89 3.32K C51 0.1uF C49 0.1uF R80 4.99K R81 4.99K 7 8 -16.5V 2 3 2 R86 1K R84 26.7K +16.5V -16.5V 4 U6B TL084 7 Q6 MMBT3904 3 2 1 R88 1M 3 -16.5V C53 47pF 11 +16.5V C54 0.1uF GND R93 150K -16.5V C66 47pF +16.5V C60 0.1uF C61 10uF/25V C62 0.1uF C63 10uF/25V C64 0.1uF C65 10uF/25V C55 10uF/25V C56 0.1uF C57 10uF/25V C58 0.1uF C59 10uF/25V +16.5V 11 R87 20K 1 U6A TL084 4 EQ2B

4

Positive Limit

SW4 SPUJ12L-2

Negative Limit

R90 10K

U6C TL084 4

11

R91 10K

-16.5V +16.5V R94 10K R92 2K 14 U6D TL084

1

A

ANTI-LOG Generator

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C52 0.1uF

9 10

2

Q5 MMBT3904

13 12

Title

DIGIMAX Microphone Pre-Amp Channel 2
Size C Date:
3 2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

+

+

-16.5V

14

-

R75 1.91K

8

11 13 12 R78 1M

U5C MC33079

R74 1M -

1

U5D MC33079

C47 0.47uF/25V

B

+

A

Rev A Sheet 2 of 9

5

4

3

2

1

D

D

J7 XLR FEMALE 1 2

3

R95 619 6 5 4 8 3 2 1 SW5 MTH-2U C73 100uF/63V R103 6.81K/0.1% 11 13 9 1 R104 169 K5 TX2-12V 3 16 D17 MMBD914 R108 619 1 C72 47uF/63VZ + R105 10K +12V3 R99 169 R100 6.81K/0.1% 6 4 C69 47uF/63VZ + R96 10K

D13 MMSZ5242 +16.5V 13 2

+16.5V R97 4.99K R98 10 5 2 C67 100uF/25V R101 100 C68 100pF R102 100 EQ3A EQ3B C70 100pF

+48V

D14 MMSZ5242 C71 220pF 4

+ -

11 U7 SSM2017S

3 1

Q7A 2N5564/65/66 +16.5V R106 169 TP5 TESTPOINT 3 5 2 Q7B 2N5564/65/66 4 R114 121 TP6 TESTPOINT R115 10K 2 C75 0.47uF/25V 9 R116 1K -16.5V 1 R109 20K

7 15

D15 MMSZ5242

+16.5V 4 R107 301 4 + 11 1 U8A MC33079 0% 7 R110 1K R111 301K 5 6 + 11

D16 MMSZ5242

-16.5V

7 U8B MC33079 0% 10 R112 1K

6

PAD3

C

-16.5V 8

C

-16.5V RV6C B10K/C10K C76 0.47uF/25V 11

VR3 LM317LZ

RV6D B10K/C10K 12 R117 1K R122 1M

RV5 100/10T ADJ VOUT 2 R118 243 +12V3 C77 10uF/25V 3

+16.5V

3

VIN

-16.5V 11 R119 10 C78 100uF/25V 11 13 12 R124 1M C80 0.47uF/25V 4 +16.5V +16.5V + U8C MC33079 8 R120 1M 9 10 R123 1M C79 0.47uF/25V 4 + U8D MC33079 14

1 R121 1.91K

-16.5V

J8 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD3

B

Presence
-16.5V -16.5V EQ3A C83 47pF -16.5V 11 R129 78.7K R125 100 C81 0.01uF 1 2 3 4 5 3 6 R128 200K RV6A B10K/C10K 1 0% R131 4.99K R135 3.32K C84 0.1uF C82 0.1uF R126 4.99K R127 4.99K 7 8 -16.5V 2 3 2 R132 1K R130 26.7K +16.5V -16.5V 4 U9B TL084 7 Q9 MMBT3904 3 2 1 R134 1M 3 -16.5V C86 47pF 11 +16.5V C87 0.1uF GND R139 150K -16.5V C99 47pF +16.5V C93 0.1uF C94 10uF/25V C95 0.1uF C96 10uF/25V C97 0.1uF C98 10uF/25V C88 10uF/25V C89 0.1uF C90 10uF/25V C91 0.1uF C92 10uF/25V +16.5V 11 R133 20K 1 U9A TL084 4 EQ3B

B

Positive Limit

Negative Limit

R136 10K

U9C TL084 4

11

R137 10K

-16.5V +16.5V R140 10K R138 2K 14 U9D TL084

1

A

ANTI-LOG Generator

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C85 0.1uF

9 10

2

Q8 MMBT3904

13 12

3

+

SW6 SPUJ12L-2

A

Title

DIGIMAX Microphone Pre-Amp Channel 3
Size C Date:
2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 3 of 9

5

4

3

2

1

D

D

J9 XLR FEMALE

1

2

3

R141 619 R145 169 5 4 8 3 2 1 SW7 MTH-2U C106 100uF/63V R149 6.81K/0.1% 11 13 9 1 R150 169 K6 TX2-12V 3 16 D22 MMBD914 R154 619 1 C105 47uF/63VZ + R151 10K +12V4 R146 6.81K/0.1% 6 4 C102 47uF/63VZ + R142 10K

D18 MMSZ5242 +16.5V 13 2

+16.5V R143 4.99K R144 10 2 C100 100uF/25V R147 100 C101 100pF R148 100 EQ4A EQ4B C103 100pF

+48V

6

D19 MMSZ5242 5 D20 MMSZ5242 C104 220pF 4

+ -

11 U10 SSM2017S

3 1

Q10A 2N5564/65/66 +16.5V R152 169 TP7 TESTPOINT 3 5 2 Q10B 2N5564/65/66 4 R160 121 TP8 TESTPOINT R161 10K 2 C108 0.47uF/25V 9 R162 1K -16.5V 1 R155 20K

7 15

+16.5V 4 R153 301 4 + 11 1 U11A MC33079 0% 7 R156 1K R157 301K 5 6 + 11

D21 MMSZ5242

-16.5V 6

7 U11B MC33079 0% 10 R158 1K

PAD4

-16.5V 8

C

-16.5V RV8C B10K/C10K C109 0.47uF/25V 11

C

VR4 LM317LZ

RV8D B10K/C10K 12 R163 1K R168 1M

RV7 100/10T ADJ VOUT 2 R164 243 +12V4 C110 10uF/25V 3

+16.5V

3

VIN

-16.5V 11 R165 10 C111 100uF/25V 11 13 12 R170 1M C113 0.47uF/25V 4 +16.5V +16.5V + U11C MC33079 8 R166 1M 9 10 R169 1M C112 0.47uF/25V 4 + U11D MC33079 14

1 R167 1.91K

-16.5V

J10 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD4

Presence
-16.5V -16.5V EQ4A C116 47pF -16.5V 11 R175 78.7K R171 100 C114 0.01uF 1 2 3 4 5 3 6 R174 200K RV8A B10K/C10K 1 0% R177 4.99K R181 3.32K C117 0.1uF C115 0.1uF R172 4.99K R173 4.99K 7 8 -16.5V 2 3 2 R178 1K +16.5V R176 26.7K -16.5V 4 U12B TL084 7 Q12 MMBT3904 3 2 1 R180 1M 3 -16.5V C119 47pF 11 13 12 R185 150K -16.5V C132 47pF +16.5V GND C126 0.1uF C127 10uF/25V C128 0.1uF C129 10uF/25V C130 0.1uF C131 10uF/25V +16.5V C120 0.1uF C121 10uF/25V C122 0.1uF C123 10uF/25V C124 0.1uF C125 10uF/25V +16.5V 11 R179 20K 1 U12A TL084 4 EQ4B
B

B

Positive Limit

Negative Limit

R182 10K

U12C TL084 4

11

R183 10K

-16.5V +16.5V R186 10K R184 2K 14 U12D TL084

1

ANTI-LOG Generator
A

A

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C118 0.1uF

9 10

2

Q11 MMBT3904

3

+

SW8 SPUJ12L-2

Title

DIGIMAX Microphone Pre-Amp Channel 4
Size C Date:
2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 4 of 9

5

4

3

2

1

D

D

J11 XLR FEMALE

1

2

3

R187 619 R191 169 5 4 8 3 2 1 SW9 MTH-2U C139 100uF/63V R195 6.81K/0.1% 11 13 9 1 R196 169 K7 TX2-12V 3 16 D27 MMBD914 R200 619 1 C138 47uF/63VZ + R197 10K +12V5 R192 6.81K/0.1% 6 4 C135 47uF/63VZ + R188 10K

D23 MMSZ5242 +16.5V 13 2

+16.5V R189 4.99K R190 10 2 C133 100uF/25V R193 100 C134 100pF R194 100 EQ5A EQ5B C136 100pF

+48V

6

D24 MMSZ5242 5 D25 MMSZ5242 C137 220pF 4

+ -

11 U13 SSM2017S

3 1

Q13A 2N5564/65/66 +16.5V R198 169 TP9 TESTPOINT 3 5 2 Q13B 2N5564/65/66 4 R206 121 TP10 TESTPOINT R207 10K 2 C141 0.47uF/25V 9 R208 1K -16.5V 1 R201 20K

7 15

+16.5V 4 R199 301 4 + 11 1 U14A MC33079 0% 7 R202 1K R203 301K 5 6 + 11

D26 MMSZ5242

-16.5V 6

7 U14B MC33079 0% 10 R204 1K

PAD5

-16.5V 8

C

-16.5V RV10C B10K/C10K C142 0.47uF/25V 11

C

VR5 LM317LZ

RV10D B10K/C10K 12 R209 1K R214 1M

RV9 100/10T ADJ VOUT 2 R210 243 +12V5 C143 10uF/25V 3

+16.5V

3

VIN

-16.5V 11 R211 10 C144 100uF/25V 11 13 12 R216 1M C146 0.47uF/25V 4 +16.5V +16.5V + U14C MC33079 8 R212 1M 9 10 R215 1M C145 0.47uF/25V 4 + U14D MC33079 14

1 R213 1.91K

-16.5V

J12 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD5

Presence
-16.5V -16.5V EQ5A C149 47pF -16.5V 11 R221 78.7K R217 100 C147 0.01uF 1 2 3 4 5 3 6 R220 200K RV10A B10K/C10K 1 0% R223 4.99K R227 3.32K C150 0.1uF C148 0.1uF R218 4.99K R219 4.99K 7 8 -16.5V 2 3 2 R224 1K +16.5V R222 26.7K -16.5V 4 U15B TL084 7 Q15 MMBT3904 3 2 1 R226 1M 3 -16.5V C152 47pF 11 13 12 R231 150K -16.5V C165 47pF +16.5V GND C159 0.1uF C160 10uF/25V C161 0.1uF C162 10uF/25V C163 0.1uF C164 10uF/25V +16.5V C153 0.1uF C154 10uF/25V C155 0.1uF C156 10uF/25V C157 0.1uF C158 10uF/25V +16.5V 11 R225 20K 1 U15A TL084 4 EQ5B
B

B

Positive Limit

Negative Limit

R228 10K

U15C TL084 4

11

R229 10K

-16.5V +16.5V R232 10K R230 2K 14 U15D TL084

1

ANTI-LOG Generator
A

A

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C151 0.1uF

9 10

2

Q14 MMBT3904

3

+

SW10 SPUJ12L-2

Title

DIGIMAX Microphone Pre-Amp Channel 5
Size C Date:
2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 5 of 9

5

4

3

2

1

D

D

J13 XLR FEMALE

1

2

3

R233 619 R237 169 5 4 8 3 2 1 SW11 MTH-2U C172 100uF/63V R241 6.81K/0.1% 11 13 9 1 R242 169 K8 TX2-12V 3 16 D32 MMBD914 R246 619 1 C171 47uF/63VZ + R243 10K +12V6 R238 6.81K/0.1% 6 4 C168 47uF/63VZ + R234 10K

D28 MMSZ5242 +16.5V 13 2

+16.5V R235 4.99K R236 10 2 C166 100uF/25V R239 100 C167 100pF R240 100 EQ6A EQ6B C169 100pF

+48V

6

D29 MMSZ5242 5 D30 MMSZ5242 C170 220pF 4

+ -

11 U16 SSM2017S

3 1

Q16A 2N5564/65/66 +16.5V R244 169 TP11 TESTPOINT 3 5 2 Q16B 2N5564/65/66 4 R252 121 TP12 TESTPOINT R253 10K 2 C174 0.47uF/25V 9 R254 1K -16.5V 1 R247 20K

7 15

+16.5V 4 R245 301 4 + 11 1 U17A MC33079 0% 7 R248 1K R249 301K 5 6 + 11

D31 MMSZ5242

-16.5V 6

7 U17B MC33079 0% 10 R250 1K

PAD6

-16.5V 8

C

-16.5V RV12C B10K/C10K C175 0.47uF/25V 11

C

VR6 LM317LZ

RV12D B10K/C10K 12 R255 1K R260 1M

RV11 100/10T ADJ VOUT 2 R256 243 +12V6 C176 10uF/25V 3

+16.5V

3

VIN

-16.5V 11 R257 10 C177 100uF/25V 11 13 12 R262 1M C179 0.47uF/25V 4 +16.5V +16.5V + U17C MC33079 8 R258 1M 9 10 R261 1M C178 0.47uF/25V 4 + U17D MC33079 14

1 R259 1.91K

-16.5V

J14 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD6

Presence
-16.5V -16.5V EQ6A C182 47pF -16.5V 11 R267 78.7K R263 100 C180 0.01uF 1 2 3 4 5 3 6 R266 200K RV12A B10K/C10K 1 0% R269 4.99K R273 3.32K C183 0.1uF C181 0.1uF R264 4.99K R265 4.99K 7 8 -16.5V 2 3 2 R270 1K +16.5V R268 26.7K -16.5V 4 U18B TL084 7 Q18 MMBT3904 3 2 1 R272 1M 3 -16.5V C185 47pF 11 13 12 R277 150K -16.5V C198 47pF +16.5V GND C192 0.1uF C193 10uF/25V C194 0.1uF C195 10uF/25V C196 0.1uF C197 10uF/25V +16.5V C186 0.1uF C187 10uF/25V C188 0.1uF C189 10uF/25V C190 0.1uF C191 10uF/25V +16.5V 11 R271 20K 1 U18A TL084 4 EQ6B
B

B

Positive Limit

Negative Limit

R274 10K

U18C TL084 4

11

R275 10K

-16.5V +16.5V R278 10K R276 2K 14 U18D TL084

1

ANTI-LOG Generator
A

A

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C184 0.1uF

9 10

2

Q17 MMBT3904

3

+

SW12 SPUJ12L-2

Title

DIGIMAX Microphone Pre-Amp Channel 6
Size C Date:
2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 6 of 9

5

4

3

2

1

D

D

J15 XLR FEMALE

1

2

3

R279 619 R283 169 5 4 8 3 2 1 SW13 MTH-2U C205 100uF/63V R287 6.81K/0.1% 11 13 9 1 R288 169 K9 TX2-12V 3 16 D37 MMBD914 R292 619 1 C204 47uF/63VZ + R289 10K +12V7 R284 6.81K/0.1% 6 4 C201 47uF/63VZ + R280 10K

D33 MMSZ5242 +16.5V 13 2

+16.5V R281 4.99K R282 10 2 C199 100uF/25V R285 100 C200 100pF R286 100 EQ7A EQ7B C202 100pF

+48V

6

D34 MMSZ5242 5 D35 MMSZ5242 C203 220pF 4

+ -

11 U19 SSM2017S

3 1

Q19A 2N5564/65/66 +16.5V R290 169 TP13 TESTPOINT 3 5 2 Q19B 2N5564/65/66 4 R298 121 TP14 TESTPOINT R299 10K 2 C207 0.47uF/25V 9 R300 1K -16.5V 1 R293 20K

7 15

+16.5V 4 R291 301 4 + 11 1 U20A MC33079 0% 7 R294 1K R295 301K 5 6 + 11

D36 MMSZ5242

-16.5V 6

7 U20B MC33079 0% 10 R296 1K

PAD7

-16.5V 8

C

-16.5V RV13C B10K/C10K C208 0.47uF/25V 11

C

VR7 LM317LZ

RV13D B10K/C10K 12 R301 1K R306 1M

RV14 100/10T ADJ VOUT 2 R302 243 +12V7 C209 10uF/25V 3

+16.5V

3

VIN

-16.5V 11 R303 10 C210 100uF/25V 11 13 12 R308 1M C212 0.47uF/25V 4 +16.5V +16.5V + U20C MC33079 8 R304 1M 9 10 R307 1M C211 0.47uF/25V 4 + U20D MC33079 14

1 R305 1.91K

-16.5V

J16 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD7

Presence
-16.5V -16.5V EQ7A C215 47pF -16.5V 11 R313 78.7K R309 100 C213 0.01uF 1 2 3 4 5 3 6 R312 200K RV13A B10K/C10K 1 0% R315 4.99K R319 3.32K C216 0.1uF C214 0.1uF R310 4.99K R311 4.99K 7 8 -16.5V 2 3 2 R316 1K +16.5V R314 26.7K -16.5V 4 U21B TL084 7 Q21 MMBT3904 3 2 1 R318 1M 3 -16.5V C218 47pF 11 13 12 R323 150K -16.5V C231 47pF +16.5V GND C225 0.1uF C226 10uF/25V C227 0.1uF C228 10uF/25V C229 0.1uF C230 10uF/25V +16.5V C219 0.1uF C220 10uF/25V C221 0.1uF C222 10uF/25V C223 0.1uF C224 10uF/25V +16.5V 11 R317 20K 1 U21A TL084 4 EQ7B
B

B

Positive Limit

Negative Limit

R320 10K

U21C TL084 4

11

R321 10K

-16.5V +16.5V R324 10K R322 2K 14 U21D TL084

1

ANTI-LOG Generator
A

A

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C217 0.1uF

9 10

2

Q20 MMBT3904

3

+

SW14 SPUJ12L-2

Title

DIGIMAX Microphone Pre-Amp Channel 7
Size C Date:
2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 7 of 9

5

4

3

2

1

D

D

J17 XLR FEMALE

1

2

3

R325 619 R329 169 5 4 8 3 2 1 SW15 MTH-2U C238 100uF/63V R333 6.81K/0.1% 11 13 9 1 R334 169 K10 TX2-12V 3 16 D42 MMBD914 R338 619 1 C237 47uF/63VZ + R335 10K +12V8 R330 6.81K/0.1% 6 4 C234 47uF/63VZ + R326 10K

D38 MMSZ5242 +16.5V 13 2

+16.5V R327 4.99K R328 10 2 C232 100uF/25V R331 100 C233 100pF R332 100 EQ8A EQ8B C235 100pF

+48V

6

D39 MMSZ5242 5 D40 MMSZ5242 C236 220pF 4

+ -

11 U22 SSM2017S

3 1

Q22A 2N5564/65/66 +16.5V R336 169 TP15 TESTPOINT 3 5 2 Q22B 2N5564/65/66 4 R344 121 TP16 TESTPOINT R345 10K 2 C240 0.47uF/25V 9 R346 1K 1 R339 20K

7 15

+16.5V 4 R337 301 4 + 11 1 U23A MC33079 0% 7 R340 1K R341 301K 5 6 + 11

D41 MMSZ5242

-16.5V 6

7 U23B MC33079 0% 10 R342 1K

PAD8

-16.5V 8

C

-16.5V RV15C B10K/C10K C241 0.47uF/25V 11

C

VR8 LM317LZ

RV15D B10K/C10K 12 R347 1K R352 1M

RV16 100/10T ADJ VOUT 2 R348 243 +12V8 C242 10uF/25V +16.5V +48V -16.5V C8 47uF/25VZ C41 47uF/25VZ -16.5V 1 2 3 4 J26 CON4

+16.5V

3

VIN

-16.5V -16.5V 11 R349 10 C243 100uF/25V 11 13 12 R354 1M + U23C MC33079 8 R350 1M 9 10 R353 1M C244 0.47uF/25V 4 U23D MC33079 14 3

1 R351 1.91K

+16.5V +16.5V

J18 CON9 1 2 3 4 5 6 7 8 9 +16.5V PAD8

4

B

-16.5V -16.5V EQ8A C248 47pF -16.5V 11 R359 78.7K R355 100 C246 0.01uF 1 2 3 4 5 3 6 R358 200K RV15A B10K/C10K 1 0% R361 4.99K R365 3.32K C249 0.1uF C247 0.1uF R356 4.99K R357 4.99K 7 8 2 3 2 R362 1K +16.5V R360 26.7K -16.5V 4 U24B TL084 7 Q24 MMBT3904 3 2 1 R364 1M 3 -16.5V C251 47pF 11 13 12 R369 150K -16.5V C264 47pF +16.5V GND C258 0.1uF C259 10uF/25V C260 0.1uF C261 10uF/25V C262 0.1uF +16.5V C252 0.1uF C253 10uF/25V C254 0.1uF C255 10uF/25V C256 0.1uF +16.5V 11 R363 20K 1 U24A TL084 4

Positive Limit

Negative Limit

R366 10K

U24C TL084 4

11

R367 10K

-16.5V +16.5V R370 10K R368 2K 14 U24D TL084

1

ANTI-LOG Generator
A

A

4

5

4

-

+

+

-

6

8

-

+

5

+16.5V C250 0.1uF

9 10

2

Q23 MMBT3904

3

2

+

C245 0.47uF/25V

Presence
EQ8B
B

-16.5V

+

SW16 SPUJ12L-2

C257 10uF/25V

C263 10uF/25V

Title

DIGIMAX Microphone Pre-Amp Channel 8
Size C Date: Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 8 of 9

5

4

3

2

1

D

D

C

C

J19 CON4 1 2 3 4 R371 1.5K R372 1.5K R373 1.5K

D43 L-1154GD

D44 L-1154GD

D45 L-1154GD

B

B

A

A

Title

DIGIMAX Sample Rate Indicators
Size C Date:
5 4 3 2

Document Number 400-DMAXMAIN Tuesday, August 22, 2000
1

Rev A Sheet 9 of 9