Yorkville Sound 3400 service manual Right = Chan B, Left = Chan A

Page 13

RIGHT = CHAN B

-1dB 30Hz

+4dB 55Hz

FILTER

MUST BE BREAK BEFORE MAKE, #3436

S1

1 OUT 2

IN 3

1K

10K:1%

C3

C7

R15

R16

R5

R6

100p

16v

470n

R14

17K8:1%

470R

14K0:1%

C5

RIGHT = CHAN B

6

16v

68n

4M7

R7

33078

7

JB1

C1

R9

R10

R11

5

1/2

U3

2

10K:1%

17K8:1% 17K8:1%

5

C8

C9

2

470p

U1

1/2

BAL_IN

3

1

C6

7

16v

47n

16v 150n

5532

1

3

6

NUTRIX

C2

U1

16v

R17

R18

1

100n

1/2

R12

R13

82K5:1%

1K5

20KHz

470p

33078

C10

+2dB

R1

R2

R3

R4

5K6

7K5

16v

SIG_L

1K

10K:1%

14K0:1%

1R

C21

TO PIN 4 OF 5532

6n8

T8

REF_L

JB2

1

3

5

C4

100n

T7

100p

T6

SIG_R

CH_B_IN

IN = MONO

S

R

T

T5

REF_R

S2

S2

-1dB 30Hz

+4dB 55Hz

NO_GOLD

2

4

6

1

4

T4

+18

OUT

OUT

FILTER

NO_GOLD

2

4

6

2

5

+18

C23

T3

GND

IN

IN

CH_A_IN

S

R

T

3

6

MUST BE BREAK BEFORE MAKE, #3436

S1

4 OUT 5

IN 6

100n

T2

-18

JB3

1

3

5

C13

C17

R33

R34

T1

100p

16v

470n

C15

R32

17K8:1%

470R

C24

2

1K

10K:1%

14K0:1%

16v

68n

33078

4M7

1

-18

100n

JB4

R20

R21

R22

R27

R28

R29

3

1/2

U3

6

10K:1%

17K8:1% 17K8:1%

3

U2

C18

C19

2

C11

1/2

BAL_IN

3

7

C16

1

16v

47n

16v 150n

5532

1

470p

5

2

NUTRIX

U2

16v

R35

R36

C12

2

100n

1/2

R30

R31

82K5:1%

1K5

20KHz

LEFT = CHAN A

470p

33078

C20

+2dB

R25

R26

5K6

7K5

16v

GREEN WIRE TO

14K0:1%

1R

C22

TO PIN 4 OF 5532

6n8

EY2

GND

GROUND STRAP:

R23

R24

C14

100n

18Ga BLACK WIRE

WC1

TO M1011 GND

GND

1K

10K:1%

100p

DATE: SEP/19/94

MODELS:

AUDIO-PRO

SCH ISSUE: 0.00

GND

AP-3400

YORKVILLE

NAME: M1012A.SCH

PCB#&VER: M1012-2.00

TITLE: INPUT_&_FILTER

Image 13

Contents 3400 HIGH EFFICIENCY STEREO POWER AMPLIFIERQuality and Innovation Since CANADAPower Sources IMPORTANT SAFETY INSTRUCTIONSREFER SERVICING TO QUALIFIED SERVICE PERSONNEL Power CordCIRCUIT DESCRIPTION VOLTAGE AMPLIFIERSHUTDOWN CIRCUIT CIRCUIT DESCRIPTIONTHE SECOND TIER QUIESCENT CONDITIONDC Protection Current Limit Protection CircuitryConditions of test Fan Circuit EMS CircuitThermal Shutdown Circuit Identifying Defective Boards in the AP-3400STEP 3 POWER UP PROCEDURE WITHOUT M1002A BOARDS SPECIFICATIONSSTEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS POWERSTEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS STEP 3 POWER UP PROCEDURE WITHOUT M1002 BOARDSAP3400 Parts List 10/28/98 STEP 1 VISUAL INSPECTION OF FRONT PANEL AND FANM1002A.SCH DATABASE HISTORY M1011A.SCH DATABASE HISTORYM1013A.SCH DATABASE HISTORY MODELS - AP-3400 M1011A.SCH DATABASE HISTORYDATE VER# DESCRIPTION OF CHANGEMS2BOTTOMBAMP M1011ASHEAR SHEARM1011A.PCB DATABASE HISTORY M1011ALEFT = CHAN A RIGHT = CHAN BM1012 C8M1012SHEAR SHEARMPSA06 MJH110182N5551 B C E2N5551 MJH11018MPSA06 B C EAP-3400 M1013ACOPPER OZ SHEAR5WATT M1002A AP-3400@R55WATT Testing Repaired Circuit Board Quick Fix for M1002 and M1002A AP3000 AND AP3400 SERVICEYORKVILLE SOUND the M1002 or M1002A circuit board to be serviced If the AP-3400 M1002ASHEAR CHECKAP-3400CEXFMR WIRING NOV SHOWN WIRED FOR#1289 A C - W H I T EAP-3400CEXFMR WIRING NOV SHOWN WIRED FOR#1289 A C - W H I T E