background image

VCD

M1127-6.00

BLANK SIZE=14.150 X 7.350"

C212

63V

1U

EY1

J17

J32

ZD202

22V

D211

1N4148

R217

10R

C1

D206

1N4004

C213

25v

470u

C214A

220P

Q208

A06

Q203

BC550

R237

1M

U201

33078

J3

C201A

16V 33U

J25

1

R230

0.5W

2R2

TP10

.

5R0

PART#6489

C203

63v

4u7

D213

1N4004

WC2

RED

WC3

YEL/GND

WC4

EY10

WC6

RED

WC7

WC8

WC3B

BLK

WC10

J31

J35

WC13

WC14

GREY

J30

WC17

WC18

GREY

DUMMY

J34

J38

J33

R244

220K

J36

J37

EY2

EY4

EY5

EY6

EY3

EY7

R240

10K

R242

47K

R236

8K2

R226

22K

R235

8K2

R209

1K5

R208

1K5

R207

4K7

R206

10K

J22

C1

C2

NO2

NO1

-

+

REL2

1A(SPST-NO)

RELAY

C204

22N

J28

C206

100U 25V

R225

470R

R227

220R

R215

1K

R216

1K

R203A

10K0

R201A

10K0

R211

220K

R210

10K

R202A

10K0

R204A

10K0

R204B

10K0

R202B

10K0

R203B

10K0

R201B

10K0

R234

4K7

ZD205

20V

ZD206

33v

ZD207

4V7

ZD201

20v

ZD210

4V7

ZD208

18V

ZD209

18V

D207

4148

D212

4148

D218

4148

D210

1N4148

D204

4148

D205

1N4148

D202B

4148

D202A

4148

D201B

4148

D201A

4148

R218

10R

J9

J2

J21

D215

1N4004

D214

1N4004

DUMMY

D203

1N4004

NO

NC

C

REL1

AROMAT_RELAY

C205

100U 25V

J26

C210

63V

470u

C209

63V

470u

C208

63V

470u

C207

470u

63V

Q201

A06

Q202

2N5401

C201B

16V

33U

C202B

33U

16V

C202A

33U

16V

R245

1M

R243

27K

R219

7K5

B

E

Q205

MJF6668

-18V

B

E

Q207

MJF6388

FAN

J12

J4

J20

J11

J10

C214B

220P

J16

1

TP4

TP3

TP2

TP1

TP7

TP8

TP6

TP5

B

E

Q204

MJF6388

+18V

Q210

2N5401

CSA

EY12

.

5R0

PART#6489

EY9

EY11

J7

V

T

R

J29

J19

J18

J27

J15
J14

J24

J13

J8

J6

1

R214

0.5W

8K2

TP9

R238

200K

V

T

R

V

T

R

V

T

R

V

T

R

V

T

R

C216

100U

25V

WC17B

GREEN

11

10

9

8

7

6

5

4

3

2

1

#

DESCRIPTION OF CHANGE

VER#

DATE

MODEL(S):-

N

N

PC#5695_ADD_TP9,10_THICKEN_TRACKS

->22K_ZD212->JUMPER_ZD210_6V2->4V7

V

V

6.00

.

D

D

OCT/27/99

.

PC#5797_R235/R236_10K->8K2_ZD202_27K-

5.10

JUL/15/98

MAR/27/98

.

.

JAN/21/98

DEC/12/97

.

.

NOV/25/97

NOV/13/97

.

OCT/97

5.00

.

.

4.00

3.00

.

.

2.00

1.01

.

1.00

PC#5649_ADD_SURGISTORS_DELETE_R233

ADD_DUMMY_TABS_FOR_CE_XFMR

R229,R230_PC#5579_REDO_AC_FOR_4N7

PC#5578_CORRECT_SPACING_FOR_R228,

UPDATE_FOR_AP4040

-072->33078

2R0->10R_ZD208/209_20V->18V_U201_TL

PC#_____DELETE_TRIAC_ADD_RELAY_R233

PC#5514_R232_270R->470R

R232_150R->270R_R233_10R->2R

FIRST_PRODUCTION

AP4020

M1127.PCB_DATABASE_HISTORY

D216

1N4004

Q240

A06

Q241

BC550

R213

0.5W

8K2

J39

ZD211

20V/1W

C215

63v

4u7

D240

4004

R228

0.5W

2R2

C2

4N7

250V

R229

0.5W

2R2

LVGND

ACT

RNFB

-55

-55

PRTCT

RTSENS

LCLIM

+18

LREF

RCLIP

RCLIP

+55

+55

LSIG

RCLIM

LNFB

ROSIG

LOSIG

RSIG

LCLIP

LCLIP

RREF

-100

-100

+100

+100

RDRV

LDRV

ROG

ROG

LOG

LOG

LTSENS

-18

16

15

14

13

12

2  ADD RTV UNDER RELAY

M1127 AP4020

RTV

PCB

RELAY

BEND LEADS FLAT TO PCB

AND 680N FOR EURO.

FOR NORTH AMERICAN

1  FOR C1 USE 22N

BLANK SIZE=14.150 X 7.350"

PRODUCTION NOTES:

VER 6.00

BLACK/AC

AP4020

M1127

TOP AMP

TO

TO BOTTOM

AMP

BLACK

RED

BLUE

YEL

WHITE

BLK

FAN

FAN

RED

SHEAR FIRST

SHEAR FIRST

SHEAR THIS WAY

SHEAR THIS WAY

TO TRANS PRIM

TRANS/PRIM

FROM TB1

GREEN/CHASS.GND

WHITE/AC

DUMMY FOR CE

P:\1127V60.PRN

Summary of Contents for Professional AP4020

Page 1: ...Schematic M1126 PCB layout 4 Service Kit M1146 m1126 5 Power Amp Module AP4020 U S A Yorkville Sound Inc 4625 Witmer Industrial Estate Niagara Falls New York 14305 USA Voice 716 297 2920 Fax 716 297 3689 WORLD HEADQUARTERS CANADA Yorkville Sound 550 Granite Court Pickering Ontario L1W 3Y8 CANADA Voice 905 837 8481 Fax 905 837 8746 Quality and Innovation Since 1963 Printed in Canada WEB www yorkvil...

Page 2: ... 1 3821 HEYCO 1200 STRAIN RELIEF 1 4835 1 4W 56K 5 T R RES 4 6433 1N5257B 33V0 0W5 ZENER 5 T R 3 3638 12 CIR CABLE HOLDER 098 1 4836 1 4W 68K 5 T R RES 4 5101 BC550C TO92 NPN TRANS T R 14 3676 8 CIR CABLE HOLDER 098 2 4838 1 4W 100K 5 T R RES 2 5102 BC560C TO92 PNP TRANS T R 14 8701 4 40 KEPS NUT ZINC 20 6120 1 4W 100K 5 MINI T R RES 2 5103 MPSA06 TO92 NPN TRANS T R 3 8793 4 40 HEX NUT ZINC 3 4851...

Page 3: ...iting the audio signal at U2 The charging attack and discharging release times of the limiter are 80mS and 3 5 seconds respectively Resistors R50 and R7 provide the charging path and resistor R51 provides the dis charge path The limiter can be defeated by placing the limiter switch S2 in the in position which disconnects Q5 and the charging discharging circuitry from V The activity LED circuit con...

Page 4: ...ction of D19A D20A and D23A The signal at the junction of R61A and R62A drives the succeeding current amplifier Current Amplifier Section The current amplifier receives a high voltage audio signal from the voltage amplifier and provides the current drive necessary to drive speaker cabinets The current amplifier is a two tier complimentary output driver design controlled by a complimentary darlingt...

Page 5: ...uced to about 6 volts measured dri ving an 8 ohm load Zener ZD8 protects the gate source junction of Q11 and also pro vides a supply current path through R29 for the floating battery NOTE The Power supply voltages given are those when the amplifier is not driving a speaker load This will allow yo to check the tier switching with the cover of the amplifi er off and the amplifier therefore running c...

Page 6: ... occurs With the voltage amplifiers now disabled there is no signal driving the output transistors Q13 to Q28 The current limit circuit protecting the output transistors Q13 to Q28 turns off and D204 and or D205 are not forward biased and Q202 turns off Through Q203 and Q201 the relay is turned back on and the voltage amplifiers are now active again dri ving the output transistors If current limit...

Page 7: ...n cables have been cut or pinched through their insulation If the fan is running at full speed at power up this usually indicates a problem with the fan circuitry on the M1127 board but it can also be caused by M1126 cir cuit problems A damaged AS35 temperature sensor located under the M1126 heatsinks can cause erratic fan behavior No output on either or both channels could be caused by intermitte...

Page 8: ... R8 10K R7 3V0 1N5225B D1 GREEN R_ACTIVITY LD2 GREEN L_ACTIVITY LD1 220R R55A 8M2 R5 470K R4 470K R3 15v 220n C22 15v 220n C21 220p C2 220p C1 100K R2 100K R1 50V 100n C127 25V 100n C126 25V 47n C3 25V 47n C4 50V 330P C41 50V 330P C40 22K R43 1K2 R136 GRN LD4 RED LD3 PRTCT 18V GND 18V RCLIP LCLIP 10 9 8 7 6 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE MODEL S D D D D D D D APR 22 98 OCT 97 V V V V V V...

Page 9: ...D PC 5736_TRACES_CHANGED_POT_SUPPORT CHANGED_FOR_PROTECT_CIRCUIT PC 5664_RIBBON_CABLE_CONNECTIONS FIRST_PRODUCTION AP 4020 M1128 PCB_DATABASE_HISTORY C40 330P R46 22K J9 J12 J1 14 PIN SOCKET C22 220n D2 4V7 P22 STYLE J4 C25 16V 33u C26 16V 33u D3 3V0 C39 330P Q2 A63 J10 LD8 6859 NSL 28AA C36 16v 22u Q4 BC560 Q5 BC560 Q6 BC560 C38 220p U2 33078P D9 4148 R43 22K J5 LD3 RED PROTECT LD6 RED L_CLIP J14...

Page 10: ...K54 R11 9K760 R16 1K54 R13 10 9 8 7 6 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE MODEL S D D D D APR 22 98 DEC 02 97 D NOV 12 97 OCT 97 V V V V 2 10 2 00 V 2 00 1 00 N N N N SWITCH_FOR_BRPRTCT LVGND 28 PC 5694_ADD_CONNECTIONS_AT_BRIDGE CHANGED_C27 C28 C29 C30_TO_150N AND_MADE_VALUE_CHANGES_FOR_AP2020 REVERSED_INPUT_POLARITY FIRST_PRODUCTION AP4020 M1129 SCH_DATABASE_HISTORY 10K0 R37 10K0 R38 9K760 R...

Page 11: ... 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE MODEL S D D D JUL 01 98 APR 16 98 DEC 02 97 D D NOV 97 OCT 97 V V V 4 00 3 00 2 00 V V 2 00 1 00 N N N ISOLATE_PIN_OF_SWITCH_S3 TO_BRIDGE_SWITCH PC 5694_PINS_10 12_OF_MC2_CONNECTED CHANGE_C27_C28_C29_C30_TO_150N SWAP_INPUTS_TO_BE_NONINVERTING RSPRE_WITH_LSPRE_AT_14PIN_CONNECTOR SWITCH_RREF_WITH_LREF_AND FIRST_PRODUCTION AP4020 4040 2020 VX1200 2400 2402 M1...

Page 12: ... Q208 15AMPS A06 Q201 100u 25v C206 100u 25v C205 470U 63v C210 470U 63v C209 470U 63v C208 470U 63v C207 4v7 500mW ZD210 18V 500mW ZD208 18V 500mW ZD209 BC550 Q203 35AMP BR2 3 4 1 2 35AMP BR1 3 4 1 2 YSL 1300 120VAC 1KVA TYPE_H TR1 1M R237 4u7 63v C203 2N5401 Q202 MC33078 1 2 4 V 8V U201 6 5 7 MC33078 1 2 4 V 8V U201 2 3 1 7 8 9 10 3 2 6 5 4 1 33U 16V C201A 33U 16V C201B 16V 33U C202B 16V 33U C20...

Page 13: ...01 CSA EY12 5R0 PART 6489 EY9 EY11 J7 V T R J29 J19 J18 J27 J15 J14 J24 J13 J8 J6 1 R214 0 5W 8K2 TP9 R238 200K V T R V T R V T R V T R V T R C216 100U 25V WC17B GREEN 11 10 9 8 7 6 5 4 3 2 1 DESCRIPTION OF CHANGE VER DATE MODEL S N N PC 5695_ADD_TP9 10_THICKEN_TRACKS 22K_ZD212 JUMPER_ZD210_6V2 4V7 V V 6 00 D D OCT 27 99 PC 5797_R235 R236_10K 8K2_ZD202_27K 5 10 JUL 15 98 MAR 27 98 JAN 21 98 DEC 12...

Page 14: ...1 BP2 16v 500mW ZD7 MR854 D20 TP4 TP5 TP7 TP6 TP9 TP10 TP1 D9 TP8 18K R70 4uH L1 5R6 5W R63 3K3 R68A 47K R205 10u 120v BC550 Q20A BC560 Q21A 3K3 R69A 10K R67A 6800U 63V C22 6800U 63V C23 6800U 63V C24 FP 39R 16v 1W FP 1R 1W R49 FP 1R 1W R33 YS6910 Q21 YS6909 Q20 YS6910 Q28 YS6909 Q18 YS6910 Q26 YS6909 Q16 0R1 5W 0R1 5W YS6910 Q24 YS6909 Q14 YS6909 Q13 YS6909 Q19 YS6909 Q17 YS6909 Q15 YS6910 Q23 MR...

Page 15: ... 2K R50A 4K7 R51A 1K5 1 HOLDER 3676 R53A 2K R43A 3K R56A 17K8 EY8 R58A 39R J12 R1 39R R62A 39R J25 C18A 22U 16V C19A 22U 16V 3894 Q15A MJE350 C26A 4U7 10V C22 5895 63V 6800u R73 2K R74 330R Q31 AS35 D14A 4148 D13A 4148 R40A 220R D16A 4148 D18A 4148 R46 1K J1 D19A 4148 D23A 4148 D22A 4148 Q14A BC560 Q17A BC550 J4 R61A 39R C29A 330U 16V Q12A 2N5551 Q13A 2N5401 R19 249R R83 200R R60A 150K 2W C27A 10u...

Page 16: ...te for one s lack of electronic capability Before starting look at the board for repair and locate the version number It is very important that you follow the procedure for the appropriate circuit board version number A complimentary service manual for the AP4020 power amplifier is sup plied with this M1146KIT STEP 1 Locate the assembly drawing for the version number printed on the M1146 or M1126 ...

Page 17: ... there is still a damaged part on the board instantly turn ing it on could blow up the board and you would be back where you started Connect the power wires and ground to the power supply Connect a digi tal multimeter to test pins 8 and 9 to measure the bias quiescent current and place a scope probe on the speaker output Be sure to turn the quies cent current trimpot RT1 fully counter clockwise No...

Page 18: ...1146 KIT 1N5242B 1N5242B 6450 6450 M1146 KIT 6854 5113 5114 5260 5260 5102 5102 5102 5102 5102 5101 5101 5101 5101 5101 5101 6444 MAC224 4 4749 0R15 5 WATT 4749 0R15 5 WATT 4745 0R1 5 WATT 4745 0R1 5 WATT 4745 0R1 5 WATT 4745 0R1 5 WATT 6990 MJL3281A 6989 MJL1302A 6874 6873 MJE350 MJE340 4974 4973 4607 4607 4645 4645 6201 6201 6201 4911 4911 4804 4804 4973 4977 4977 4982 4982 4591 4593 4593 4606 4...

Page 19: ... D5 350V 2N6517 Q7 2K2 R21 330R R74 2K R73 MT1 MT2 G TRIAC_MAC224 Q30 20K R35A 16v 10u C21 33K R64 10R R65 39R R32 39R R48 1R 0 5W R28 1R 0 5W R44 120v 220n C11 120v 220n C14 20K R40B 3R9 2W R62 150v 10n C19 BP1 BP2 16V 500mW ZD7 MR854 D20 TP4 TP5 TP7 TP6 TP9 TP10 TP1 D9 TP8 18K R70 4uH L1 5R6 5W R63 3 3K3 R68A 47K R205 10u 120v BC550 Q20A BC560 Q21A 3K3 R69A 10K R67A 4700U 80V C22 4700U 80V C23 4...

Page 20: ...2A 4148 Q14A BC560 Q17A BC550 J4 R61A 47R C29A 330U 16V Q12A MPSA42 Q13A MPSA92 U2 4N35 R83 200R R60A 220K 2W C27A 10u 160V C28A 160V 10u Q18A MJE340 Q19A MJE350 C23A 500V 10P C22A 500V 10P TP5A D21A 4148 J26 HS2 3894 HS1 3894 EY8 EY7 EY4 1 1 2 2 JB2 EY6 C31 22N R34 270R JZD3 R17 249R J5 R57A 150R C30A 33u 16V R72A 33R R53A 2K C31A 33u 16V EY1 R45A 3K6 5WATT J34 1 1 2 2 JB3 R12 39R J19 R55A 21K5 R...

Page 21: ...M1127 5 00 R E D G R EY G R EY AP4020CE AC WIRING OCT 24 2000 GREEN YELLOW 1196E 680n N L 4 17 17 15 17 WHITE BLACK GREY YELLOW RED RED GREY SHOWN WIRED FOR 230V BROWN BLACK BROWN BLUE ...

Page 22: ...M1127 5 00 R E D G R EY G R EY AP4020CE AC WIRING OCT 24 2000 GREEN YELLOW 1196E 680n N L 4 17 17 15 17 WHITE BLACK GREY YELLOW RED RED GREY SHOWN WIRED FOR 245V BROWN BLACK BLUE BROWN ...

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