Fostex ADDA-2 PCB Manuale operativo

Service Manual Supplement

DigitalMasterRecorder

ADDA-2 PCB

for

Model D-25/D-30

SAFETY INSTRUCTIONS

Read instructions - All the safety and operating instruc-

tions should be read before the appliance is operated.

Retain instructions - The safety and operating instructions

should be retained for future reference.

Heed warnings - All warnings on the appliance and in the

operating instructions should be adhered to.

Follow instructions - All operating and use instructions

should be followed.

Water and Moisture - The appliance should not be used

near water - for example, near a bathtub, washbowl,

kitchen sink, laundry tub, in a wet basement, or near a

swimming pool, and the like.

Carts and Stands - The appliance should be used only

with a cart or stand that is recommended by the manufac-

turer.

An appliance and cart combination should be moved with

care. Quick stops, excessive force, and uneven surfaces

may cause the appliance and cart combination to over-

turn.

Wall or Ceiling Mounting - The appliance should be

mounted to a wall or ceiling only as recommended by the

manufacturer.

Ventilation - The appliance should be situated so that its

location or position does not interfere with its proper ven-

tilation. For example, the appliance should not be situ-

ated on a bed, sofa, rug, or similar surface that may block

the ventilation openings; or, placed in a built-in installa-

tion, such as a bookcase or cabinet that may impede the

flow of air through the ventilation openings.

Heat - The appliance should be situated away from heat

sources such as radiators, heat registers, stoves, or other

appliances (including amplifiers) that produce heat.

Power Sources - The appliance should be connected to a

power supply only of the type described in the operating

instructions or as marked on the appliance.

Grounding or Polarization - The precautions that should

be taken so that the grounding or polarization means of

an appliance is not defeated.

Power Cord Protection - Power supply cords should be

routed so that they are not likely to be walked on or

pinched by items placed upon or against them, paying

particular attention to cords at plugs, convenience recep-

tacles, and the point where they exit from the appliance.

Cleaning - The appliance should be cleaned only as rec-

ommended by the manufacturer.

Nonuse Periods - The power cord of the appliance should

be unplugged from the outlet when left unused for a long

period of time.

Object and Liquid Entry - Care should be taken so that

objects do not fall and liquids are not spilled into the en-

closure through openings.

Damage requiring Service - The appliance should be ser-

viced by qualified service personnel when:

Servicing - The user should not attempt to service the ap-

pliance beyond that described in the operating instruc-

tions. All other servicing should be referred to qualified

service personnel.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

TO PREVENT ELECTRIC SHOCK, MATCH

WIDE BLADE OF PLUG TO WIDE SLOT,

FULLY INSERT.

POUR ÉVITER LES CHOCS ÉLECTRIQUES,

INTRODUIRE LA LAME LA PLUS LARGE DE

LA FICHE DANS LA BORNE CORRE-

SPONDANTE DE LA PRISE ET POUSSER

JUSQU' AU FOND.

CAUTION:

ATTENTION:

The exclamation point within an equilateral

triangle is intended to alert the user to the

presence of important operating and mainte-

nance (servicing) instructions in the literature

accompanying the appliance.

The lightening flash with arrowhead symbol,

within an equilateral triangle, is intended to

alert the user to the presence of uninsulated

“dangerous voltage” within the product's en-

closure that may be of sufficient magnitude to

constitute a risk of electric shock to persons.

“WARNING”

“TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOIS-

TURE.”

The power supply cord or the plug has been damaged;

Objects have fallen, or liquid has been spilled into the

appliance; or

The appliance has been exposed to rain; or

The appliance does not appear to operate normally or

exhibits a marked changed in performance; or

The appliance has been dropped, or the enclosure

damaged.

10.

11.

12.

13.

14.

15.

16.

17.

D-25/D-30 ADDA-2

TABLE OF CONTENTS

1. ADJUSTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1. DA Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2. AD Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. PATTERN DRAWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D-25 USA/CND : 0200407 and onwards

EUR : 0600407 and onwards

UK : 0700191 and onwards

D-30 USA/CND : 0920866 and onwards

EUR : 0920881 and onwards

UK : 0920901 and onwards

NOTES

Adjustment procedures, parts list, pattern drawing and circuit diagrams are given in this manual to assist

the service technician in maintaining the D-25 / D-30 withADDA-2 PCB assy.

For your information, the followings are the serial number of D-25 / D-30 with ADDA-2 PCB assy.

D-25/D-30 ADDA-2

1. ADJUSTING PROCEDURES

5030

BAL IN

(XLR) UNBAL OUT

(RCA)

D-25 / D-30

VOLTMETER

AUDIO OUT (XLR)

CH 1 CH 2 CH 1 CH 2

Fig. 1

1-1. DA Level Adjustment

Set up the D-25/D-30 as follows.

Sampling Frequency : 44.1kHz

REF Marker position : -12dB

Connect the Model 5030 input (XLR) to the D-25/D-30 audio output CH 1 and CH 2 and an AC volt meter

to the Model 5030 (RCA) as shown in Fig. 1.

Playback the 1kHz, 0dB section (PROG NO. 1) of SONY test tape TY-7551.

Adjust R192 (CH 1) and R292 (CH 2) on theADDA-2 PCB so that theAC volt meter reading is +2dBV. By

this adjustment, a 1kHz, +16dBm sine wave should appear at the D-25/D-30 audio output.

Adjusting points : R192 (for CH 1) on ADDA-2 PCB

R292 (for CH 2) on ADDA-2 PCB

D-25/D-30 ADDA-2

VOLTMETER

CH 1 CH 2

CH 1

CH 2

D-25 / D-30

AUDIO OUT

(XLR)

AUDIO IN

(XLR)

5030

BAL OUT BAL IN

UNBAL

OUT

UNBAL

CH 1

CH 2

OSC

1-2. AD Level Adjustment

Fig. 2

Set up the D-25/D-30 as follows.

REF Marker position : -12dB

Sampling Frequency : 44.1kHz

A1, A2 INPUT MONITOR Key : ON position

Connect the sine wave oscillator, Model 5030, and AC volt meter with D-25/D-30 as shown in Fig. 2.

Output a 1kHz, +4dBm sine wave signal from the sine wave oscillator. Under this setting, a 1kHz, +4dBm

sine wave signal will be applied to the D-25/D-30 audio input terminal.

Adjust R191 (CH 1) and R291 (CH 2) on theADDA-2 PCB so that the AC volt meter reading is -10dBV.

Adjusting points : R191 (for CH 1) on ADDA-2 PCB

R291 (for CH 2) on ADDA-2 PCB

D-25/D-30 ADDA-2

3. PARTS LIST

8274121000 PCB Assy, ADDA-2, D-25/D-30

ICs

Ref. No. Part No. Description

U001 8236540301 ST, AN, REGULATOR, NJM78M05D

U002 8236561004 ST, DG, 74HCU04

U003-006 8236570101 ST, DG, DRIVER, DTC114EK

U007-013 8236570401 ST, DG, DRIVER, DTA114EK

U021 8236502700 ST, DA, ADC, AK5340

U022 8236560074 ST, DG, 74HC74

U023 8236560000 ST, DG, 74HC00

U051 8236505300 ST, DA, DAC, AK4320

U052 8236720700 ST, AN, NJM4560M

U081 8236720700 ST, AN, NJM4560M

U101, 201 8236720700 ST, AN, NJM4560M

U102, 202 8236505011 ST, AN, OP AMP, NJM2115M(TEI)

U141, 241 8236720700 ST, AN, NJM4560M

TRANSISTORs

Ref.No. PartNo. Description

Q101, 201 8234143403 TR, VT, NPN, 2SC2878-A/B

Q102, 202 8234143403 TR, VT, NPN, 2SC2878-A/B

Q103, 203 8234143403 TR, VT, NPN, 2SC2878-A/B

Q104, 204 8234143403 TR, VT, NPN, 2SC2878-A/B

Q141, 241 8234143403 TR, VT, NPN, 2SC2878-A/B

Q142, 242 8234143403 TR, VT, NPN,. 2SC2878-A/B

Q143, 243 8234143403 TR, VT, NPN, 2SC2878-A/B

Q144, 244 8234143403 TR, VT, NPN, 2SC2878-A/B

Q181, 281 8234143403 TR, VT, NPN, 2SC2878-A/B

DIODEs

Ref.No. PartNo. Description

D001, 002 8234502800 D, ST, DAN202K

D101, 201 8234502800 D, ST, DAN202K

D102, 202 8234502800 D, ST, DAN202K

D103, 203 8234502800 D, ST, DAN202K

D104, 204 8234502800 D, ST, DAN202K

D141, 241 8234502800 D, ST, DAN202K

D142, 242 8234502800 D, ST, DAN202K

D143, 243 8234502800 D, ST, DAN202K

D144, 244 8234502800 D, ST, DAN202K

D181, 281 8234502800 D, ST, DAN202K

RESISTORs

Ref. No. Part No. Description

R001 8230112101 H, METAL, 1W, 100, 5%, F1

R002-005 8230500103 ST, CARBON, 1/10W, 10K, 5%

R006-013 8230500104 ST, CARBON, 1/10W, 100K, 5%

R021 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R022 8230500112 ST, CARBON, 1/10W, 1.1K, 5%

R023 8230500100 ST, CARBON, 1/10W, 10, 5%

RESISTORs

Ref. No. Part No. Description

R101, 201 8230500123 ST, CARBON, 1/10W, 12K, 5%

R102, 202 8230500473 ST, CARBON, 1/10W, 47K, 5%

R103, 203 8230500103 ST, CARBON, 1/10W, 10K, 5%

R104, 204 8230500103 ST, CARBON, 1/10W, 10K, 5%

R105, 205 8230500183 ST, CARBON, 1/10W, 18K, 5%

R106, 206 8230500332 ST, CARBON, 1/10W, 3.3K, 5%

R107, 207 8230500392 ST, CARBON, 1/10W, 3.9K, 5%

R108, 208 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R109, 209 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R110, 210 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R111, 211 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R112, 212 8230500103 ST, CARBON, 1/10W, 10K, 5%

R113, 213 8230500103 ST, CARBON, 1/10W, 10K, 5%

R114, 214 8230500272 ST, CARBON, 1/10W, 2.7K, 5%

R115, 215 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R116, 216 8230500122 ST, CARBON, 1/10W, 1.2K, 5%

R117, 217 8230500473 ST, CARBON, 1/10W, 47K, 5%

R118, 218 8230500105 ST, CARBON, 1/10W, 1M, 5%

R119, 219 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R120, 220 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R121, 221 8230500103 ST, CARBON, 1/10W, 10K, 5%

R122, 222 8230500472 ST, CARBON, 1/10W, 4.7K, 5%

R123, 223 8230500103 ST, CARBON, 1/10W, 10K, 5%

R124, 224 8230500103 ST, CARBON, 1/10W, 10K, 5%

R125, 225 8230500331 ST, CARBON, 1/10W, 330, 5%

R126, 226 8230500331 ST, CARBON, 1/10W, 330, 5%

R127, 227 8230500102 ST, CARBON, 1/10W, 1K, 5%

R128, 228 8230500102 ST, CARBON, 1/10W, 1K, 5%

R141, 241 8230500103 ST, CARBON, 1/10W, 10K, 5%

R142, 242 8230500272 ST, CARBON, 1/10W, 2.7K, 5%

R143, 243 8230500103 ST, CARBON, 1/10W, 10K, 5%

R144, 244 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R145, 245 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R146, 246 8230500122 ST, CARBON, 1/10W, 1.2K, 5%

R147, 247 8230500473 ST, CARBON, 1/10W, 47K, 5%

R148, 248 8230500105 ST, CARBON, 1/10W, 1M, 5%

R149, 249 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R150, 250 8230500103 ST, CARBON, 1/10W, 10K, 5%

R151, 251 8230500103 ST, CARBON, 1/10W, 10K, 5%

R152, 252 8230500472 ST, CARBON, 1/10W, 4.7K, 5%

R153, 253 8230500182 ST, CARBON, 1/10W, 1.8K, 5%

R154, 254 8230500103 ST, CARBON, 1/10W, 10K, 5%

R155, 255 8230500101 ST, CARBON, 1/10W, 100, 5%

R156, 256 8230500103 ST, CARBON, 1/10W, 10K, 5%

R157, 257 8230500183 ST, CARBON, 1/10W, 18K, 5%

R158, 258 8230500332 ST, CARBON, 1/10W, 3.3K, 5%

R159, 259 8230500392 ST, CARBON, 1/10W, 3.9K, 5%

D-25/D-30 ADDA-2

CAPACITORs

Ref. No. Part No. Description

C101, 201 8232145106 VT, ALU, 35V, 10µF, 20%

C103, 203 8233500100 ST, CER, 50V, 10PF, 5%

C104, 204 8232144476 VT, ALU, 25V, 47µF, 20%

C105, 205 8232145106 VT, ALU, 35V, 10µF, 20%

C106, 206 8233504472 ST, CER, 25V, .0047µF, 10%

C107, 207 8233504822 ST, CER, 25V, .0082µF, 10%

C109, 209 8233500100 ST, CER, 50V, 10PF, 5%

C110, 210 8232144476 VT, ALU, 25V, 47µF, 20%

C111, 211 8233504103 ST, CER, 25V, 0.01µF, 10%

C112, 212 8233504103 ST, CER, 25V, 0.01µF, 10%

C113, 213 8232143476 VT, ALU, 16V, 47µF, 20%

C114, 215 8233500101 ST, CER, 50V, 100PF, 5%

C117, 217 8233500220 ST, CER, 50V, 22PF, 5%

C118, 218 8233504103 ST, CER, 25V, 0.01µF, 10%

C119, 219 8232143106 VT, ALU, 16V, 10µF, 20%

C120, 220 8232143106 VT, ALU, 16V, 10µF, 20%

C121, 221 8233500152 ST, CER, 50V, .0015µF, 5%

C122, 222 8232143106 VT, ALU, 16V, 10µF, 20%

C123, 223 8233504103 ST, CER, 25V, 0.01µF, 10%

C141, 241 8232143476 VT, ALU, 16V, 47µF, 20%

C143, 243 8233500681 ST, CER, 50V, 680PF, 5%

C144, 244 8233504472 ST, CER, 25V, .0047µF, 10%

C145, 245 8233504822 ST, CER, 25V, .0082µF, 10%

C147, 247 8233500100 ST, CER, 50V, 10PF, 5%

C148, 248 8233504103 ST, CER, 25V, 0.01µF, 10%

C149, 249 8233504103 ST, CER, 25V, 0.01µF, 10%

C150, 250 8232143476 VT, ALU, 16V, 47µF, 20%

C152, 252 8233500100 ST, CER, 50V, 10PF, 5%

C153, 253 8232144476 VT, ALU, 25V, 47µF, 20%

C182, 282 8233500100 ST, CER, 50V, 10PF, 5%

C183, 283 8232145106 VT, ALU, 35V, 10µF, 20%

MISCELLANEOUS

Ref. No. Part No. Description

B101 8251515000 Plain PCB, ADDA-2, D-25/D-30

J001 8245053029 CONN, PI, JACK, 8263, 9P, RED

J002 8245272025 CONN, PI, JACK, FPC, 25P

J003 8245171113 CONN, PI, JACK, 8283, 13P, WHT

J004 8245171113 CONN, PI, JACK, 8283, 13P, WHT

J005 8245171106 CONN, PI, JACK, 8283, 6P, WHT

J006 8245171107 CONN, PI, JACK, 8283, 7P, WHT

L001 8242135001 COIL, 50µH, SKP-2-30

L021 8242196223 COIL, PVT, 22µH, 5%, LF5.0S

L051 8242196223 COIL, PVT, 22µH, 5%, LF5.0S

Y1601 8207006102 Spacer, MPS-04

RESISTORs

Ref. No. Part No. Description

R160, 260 8230500562 ST, CARBON, 1/10W, 5.6K, 5%

R161, 261 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R162, 262 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R163, 263 8230500222 ST, CARBON, 1/10W, 2.2K, 5%

R181, 281 8230500331 ST, CARBON, 1/10W, 330, 5%

R182, 282 8230500103 ST, CARBON, 1/10W, 10K, 5%

R183, 283 8230500103 ST, CARBON, 1/10W, 10K, 5%

R184, 284 8230503471 ST, CARBON, 1/2W, 470, 5%

R185, 285 8230500101 ST, CARBON, 1/10W, 100, 5%

R186, 286 8230500104 ST, CARBON, 1/10W, 100K, 5%

R191, 291 8231014472 R-TRIM, H, CARBON, 4.7K, 637A

R192, 292 8231014472 R-TRIM, H, CARBON, 4.7K, 637A

CAPACITORs

ALU = Electrolytic

CER = Ceramic type

Ref. No. Part No. Description

C001, 002 8232145106 VT, ALU, 35V, 10µF, 20%

C003, 004 8232145106 VT, ALU, 35V, 10µF, 20%

C005 8232144476 VT, ALU, 25V, 47µF, 20%

C006 8233504103 ST, CER, 25V, 0.01µF, 10%

C007 8232142107 VT, ALU, 10V, 100µF, 20%

C008 8232144476 VT, ALU, 25V, 47µF, 20%

C009 8233502104 ST, CER, 50V, 0.1µF, +80

C010 8233502104 ST, CER, 50V, 0.1µF, +80

C011 8232144476 VT, ALU, 25V, 47µF, 20%

C012 8233504103 ST, CER, 25V, 0.01µF, 10%

C021 8232143106 VT, ALU, 16V, 10µF, 20%

C022, 023 8233504103 ST, CER, 25V, 0.01µF, 10%

C024~027 8233504103 ST, CER, 25V, 0.01µF, 10%

C028 8232143106 VT, ALU, 16V, 10µF, 20%

C029 8232146475 VT, ALU, 50V, 4.7µF, 20%

C030, 031 8233504103 ST, CER, 25V, 0.01µF, 10%

C032 8232143106 VT, ALU, 16V, 10µF, 20%

C033 8233504103 ST, CER, 25V, 0.01µF, 10%

C034 8233504103 ST, CER, 25V, 0.01µF, 10%

C035 8233504103 ST, CER, 25V, 0.01µF, 10%

C036 8233502104 ST, CER, 50V, 0.1µF, +80

C037 8232143106 VT, ALU, 16V, 10µF, 20%

C038 8233504103 ST, CER, 25V, 0.01µF, 10%

C051 8233504103 ST, CER, 25V, 0.01µF, 10%

C052 8233504103 ST, CER, 25V, 0.01µF, 10%

C053 8232143106 VT, ALU, 16V, 10µF, 20%

C054 8233502104 ST, CER, 50V, 0.1µF, +80

C055 8232143106 VT, ALU, 16V, 10µF, 20%

C056 8233502104 ST, CER, 50V, 0.1µF, +80

C057 8232143476 VT, ALU, 16V, 47µF, 20%

C058 8233502104 ST, CER, 50V, 0.1µF, +80

C060~063 8233504103 ST, CER, 25V, 0.01µF, 10%

C064, 065 8233504103 ST, CER, 25V, 0.01µF, 10%

C081, 082 8233504103 ST, CER, 25V, 0.01µF, 10%

D-25/D-30 ADDA-2

L1 C201

Q202

Q102

C204

C104

R212 R291

R191

C203

R208

R207

R206

R205

R217

R216 C207

C206

R208

R207

R206

R205

Q103

Q281

Q142

C153

C253

Q143

Q243

Q242

Q244

R260

R259

R258

R257

R160

R159

R158

R157

U81

Q181

R284

C181

C281

R254

R255

R250

C247 C246

C146

R247

R246

R244

C244

C245

C248 C249

C243

R242

U52

C242

C142

C143

C241

C57

L51

C55

C141

C250

R252

R152

C150

U241

R292

Q241

C56

C54

C53

U51

R142

Q141

R192

U141

C282

R281

R181

R184

C283

C183

Q201

Q101

R285

R185

Q144

C101 E

U201 U202

U102

U21

U2 U22

D204

D104

D101

D102

D103

D201

D202

D203

D281

D181

D144

D143

D142

D244

D243

D242

D241

D141

R27

R10

R11

C24

R12

C25

R13

C26

R283

R145

R211

R115

R110

R209

R215

C83

R162

R161 C63

C62

C61

C60

U10

U11

U12

U13

U23

L21

15 888

111

C210

C110

U101

C211C212 R223

R225

C30

R23 C36 C38

C37

25 1

C29

R226

R126

R125

C28

R123

C222

C213

C122C113

C205

C105

R201

C102

R101

17 1

ANALOG I/O CH1

ANALOG I/O CH2

POWER

PHONES

C1 C2 C3 C4

C11

C202

C215

R221

R222

C115

R122

R224

C217

C221C121

C216

R124

C117

C116

R230

R229C219 C220

R130

R129C119 C120

C32

C21

R109R163

R262 R111

C12

C22

R2R4

R21

C214

C114

C208

R219

C209

R220

R119

C109

R120

Q204

R203

Q104

R103

C103

R112

R117

R116 C107

C106

C108

R189

R263

R261

R245

R210

R291 : AD LEVEL CH2

R191 : AD LEVEL CH1

R292 : DA LEVEL CH2

R192 : DA LEVEL CH1

R154

R155

R250

C247

R247

R246

R244

C144

C145

PARTS SIDE VIEW

4. PATTERN DRAWING

D-25/D-30 ADDA-2

C37 L21

C29 C28 C119

C120

C219

C222 C213

C220

C21

C35

C34

R227

R218

Q204 B

C210

Q201

Q202

Q203

R214

R213

R202

C204

R204

C205

C122 C113

R291

C201

Q101

BQ102

Q103

Q242

Q243

Q244

Q142

Q143

Q144

C112

C111

R114

R113

R102

C104

R286

R282

C82

R182 C81

R186

C11

C1 C2 C3 C4

C10

R104

C105

C252

R251

R151

C149

R249

R248

R149

R148

C251

C152

C151

C66

C148

R256

R156

R253

R153

R191

C253

C153

Q181

Q281

C283

C183

R292

C250

Q241

C150

Q141 R192

C201

R118

Q104 B

C110

R228C39

C223 C218

R127

R128

C123 C118

C31

C32

C59

C51

C53

C52

C58

R241

C64

C65 R243

R141

R143

C55

CL51

C57

C241

C141

R22

C33

FOIL SIDE VIEW

D-25/D-30 ADDA-2

A+24

AGND

8283-13P

ANALOG I/O 1 AGNDO

AGNDO1

A-24 A-18

A+18

AGNDO

MOUT1

AGNDI1

AIN1

AGNDO1

AOUT1

LINEMUTE

A-18

AGND

A+18

A-24

AGNDO

A+24

AGND

8283-13P

ANALOG I/O 2

8283-6P

INPUT VOLUME

8283-7P

PHONES AMP

8263-9P(RED)

AGNDO

AGNDO2

A-24 A-18

A+18

AGNDO

MOUT2

AGNDI2

AIN2

AGNDO2

AOUT2

LINEMUTE

A-18

AGND

A+18

A-24

AGNDO

A+24

AOUT2

AGNDO

AOUT1

PHONESMUTE

A-24

AGNDO

A+24

VLIN2

AIN2

AGNDI2

VLIN1

AIN1

AGNDI1

A+24

A-24

A+24

A+18

AGND

A-18

A-24

A+5

DGND1

VCCD+5

GNDDGND

AGNDO

10/16

100(1W)

50µH

47/25

47/25 C9

0.1 C10

0.1 C11

47/25 C12

0.01

0.01 C7

100/10

NJM78M05FA

3IN

OUT 1

10/16

AGNDO

AOUT1

AGNDO1

AOUT2

AGNDO2

A+18

A-18

A+18

A-18

A+5

DGND1

A+5

DGND1

MSCK

DAAD

BCK

LRCK

L-20

L-18

L-12

/RST_ADDA

DA_DATA

EMPHA

MSCK

BCK

LRCK

L-18

L-12

L-10

RST_ADDA

AD_MUTE

AD_DATA

EMPHA

VLIN1

AGNDI1

VLIN2

AGNDI2

A+18

A-18

A+18

A-18

A+5

DGND1

A+5

DGND1

D+5

DGND

D+5

DGND

AOUT1

AOUT2

MONIMUTE

A+18

A-18

A+18

A-18

MOUT1

MONITOR

AGNDO1

MOUT2

AGNDO2

MONITOR

MUTDRV

DGND

D+5

A-18

AGND

A+18

A-24

AGNDO

A+24 8370-25P

CN-BOARD

LVL1

LVL2

LVL3

LVL4

/EMPHA

/MONIMUTE

/LINEMUTE

AD_MUTE

RST_ADDA

LRCK

BCK

DA_DATA

AD_DATA

/RST

DGND

1U2A U2B

LINEMUTE

MONIMUTE

PHONESMUTE

BCK_ADDA

/RST_ADDA

RST_ADDA

LRCK_ADDA

U2C 74HCU04

74HCU04

DTC114EK

DGND

A+5

DTC114EK

DTA114EK

DAN202K

DTA114EK

U10

DTA114EK

U11

DTA114EK

U12

DTA114EK

U13

DTA114EK

MUTDRV

10k

R6 100k

R7 100k

R8 100k

R9 100k

R10 100k

R11 100k

R12 100k

R13 100k

A-18

LINEMUTE

MONIMUTE

PHONESMUTE

EMPHA

LVL4

LVL3

LVL2

LVL1

10k

DTC114EK U6

DTC114EK

U2D

U2E

U2F

23 4

5698

11 10

13 12

MSCK

128FS

FOSC

5. CIRCUIT DIAGRAMS

ADDA2, ROOT

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