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CA-201

ClassPO

WERAMPLIFIER

SERVICEMAN

UAL

v1.0

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Index

Mechanica

lAssembly

3

PCBoards

18

TestingProcedures

26

Diagrams

29

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CA-201

M

ECHANICA

L

ASSEMBLY

C

lass-3

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1 HDW SPAENAUR R3100-31(Retaining Ring)

2 DDM BUSHR1 (Plastic Bushing)

3 HDW 94369 (Spring)

4 DDM PSWL1 (Power Switch Knob)

5 L033XR01

1

2

3

4

CA-201FACE PLATE ASSEMBLY

Class - 4

CA-201

5

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1 MPFU-0804

2 L02CXR02

3 L033XR01

Class - 5

1

2

SIDE VIEW

3

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1 L034XR01

2 B-336

Class - 6

1

2

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1 HEATSINK

2 SS-185

3 N-281

Class - 7

1

3

2

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CA-201HEATSINK ASSEMBLY

Class - 8

SIDE VIEW

1 8-32X1/2 BHCS

2 L031XR07

1

2

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CA-201CHASSIS REAR VIEW

1 NEU NC3FPB-1

2 BZO 4-40x3/8 FHCS

3 FUSE PLASTIC NUT

4 FUSE RUBBER GASKET

5 FUSE HOLDER

6 BZO 6-32x3/8 BHCS

7 SWI EAC-310

8 HDW #6 LK WASHER

9 HDW 6-32 NUT

5

4

3

6

7

9

8

1

2

Class - 9

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CHASSIS REAR VIEW

1 RCA NUT

2 RCA GROUND LUG

3 RCA FLAT PLASTIC WASHER

4 RCA SHOULDER PLASTIC WASHER

5 A/D AD3505FP (RCA jack)

6 BINDING POST

7 B. POST SPACER

8 B. POST WASHER

9 B. POST NUTS

1

2

3

4

5

Class - 10

CA-201

7 8

9

6

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CA-201HEATSINK

1 L038XR02

2 L036XR01

3 L037XR03

4 L036XR01

5 1740.

6 10-32X1/2 BHCS

Class - 11

1

2 43

6

TOP VIEW

FRONT VIEW

5

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CA-201L BAR

Class - 12

1

2

3

4

5

7

8

6

6 3104.

7 B032XR05

8 727.

9 MPS2222

10 DELTA BOND (blue glue)

1 MS-2147

2 W-311

3 TRANSISTOR

4 K4-04

5 L038XR02

TOP VIEW

SIDE VIEW

910

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CA-201CHASSIS

1 PLA CAPFR1

2 HDW #8 FLAT WASHER

3 BZO 8-32x3/4 BHCS

4 L031XR07

Class - 13

1

2

3

4

TOP VIEW

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CA-201PARTIAL ASSEMBLY

1 B035X

2 B032X

3 B037X

4 B01CX

Class - 14

4

3 2

1

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Class - 15

CA-201PARTIAL ASSY

1 B036X

2 6689-X0-03

3 T-P 5.5

1

3

2

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CA-201PARTIAL ASSEMBLY

Class - 16

1 L03CXR00

2 N-280

3 SS-185

1

3

2

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CA-201SHIPPING AREA - FINAL ASSY

Class - 17

1 HX-2003

2 L032XR03

1

2

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CA-201

PCBOARDS

C

lass-18

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CA-201B036XR03 CAPACITOR

Class - 19

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CA-201B037XR05 CONTROL

Class - 20

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CA-201B035XR02 INPUT

Class - 21

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CA-201B034XR06 TOGGLE

Class - 22

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Class - 23

CA-201B032XR05 DEVICE (X2)

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Class - 24

CA-201B033XR05 MAINBOARD

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Class - 25

CA-201B01CXR00 POWER SWITCH

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CA-201

TESTING

PROCEDURE

S

Class-26

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Class-27

CA-201

START-UP

1.Checkallmechanicalandelectroniccomponents.

2.Checkallwiresposition.

3.Connectthejumpersand/or

wiresfor120volt.

4.Turnthebiastrimpotallway

down.(bias=ov)

5.Connecttheunitinbypassm

ode.

6.Connecttheunitwithvariabletransformer.

1.Apply10vA.C.fromvariable

transformerandmeasure

therailanddriver

voltage.Ifthisvoltageisno

tokthenturnofftheunita

ndtherechecktheunit.

2.If

therailanddrivervoltageoktheincreasethelinevoltageandcheckrailand

drivervoltageuptolinevoltagewas120v.

3.Thenremovebypassmode.

4.Turnonunitandcheckther

ails,driversandoffsetvoltagesforallchannels.

A

lsocheckthesequenceof

relayclicking.NEXT119

5.Adjustthebiasandoffset.(Someunitbiasisfixed.)

6.Checkthevoltageforrelays

andothersupplyvoltage.

7.Checkprotectioncircuitfora

llchannels.

8.CheckIR(in/out)and/orpho

nejack.

9.Connecttheloadandinputsignal.Checktheoutputa

ndmeasurethepower

w

ith4^and8^loadforallfo

llowingcondition:

R

egularstereo

R

egularmono

B

alancestereo

B

alancemono

10.I

ntheendcheckbias+offsetagain.

11.C

hecknoise.

12.P

uttheunitonburn-inbench.

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CA-201

FIN

ALTEST

Class-28

1.

B

eforefinaltestunitwas4daysonburn-in-benchwithm

usic.

2.

Taketheunitfromburn-in-b

enchtoQ.Candplayitim

mediately.Keeptheline

120VA.C.

3.

C

heckphysicallyandcheck

thecomponents.

-Checkallcapacitoranddevicesdirection.Capacitorstanduprightwayi.e.

checkco-solder.

-checkanymissingparts.

-checkallfusesockets.

-checkmainboardtightupw

ithscrewandwasher.

-checkanyscrewmissing.

-checkbalancelockworking

smoothly.

-checkalloutputtransistorspositionwithpad.

-checkmaintransistorspositionwithpad.

-checkmaintransformertigh

tverywell.

4.

A

djustbias26mVforeveryo

utputdevicesforbothchannels.Wait7to8minutes

aftereachadjustment.Alsoadjustoffsetto0mV.

5.

M

easurerailandpre-drivervoltage.

6.

M

easureA.Cvoltageforbrid

ge.

7.

M

easuresupplyvoltagefor

relays.+15Vand15Vforbothchannels.+12Vand

12V.

8.

M

easurereferencevoltage8

.1Vonbothchannels.

9.

M

easurereferencevoltageforprotection78V.

10.

A

ftersettingthebias,connectloadandinputsignal.Ch

eckoutputsignal.Check

phasewithinputsignal.

11.

M

easurefrequencyrespons

e,slewrate,gain,signaltonoiseratio.

12.

C

hecktheoutputsignalfrom

20Hzto20KHwithloadinfollowingcombination.

A

lsomeasuretheoutputpow

er.

R

egegur-stereo

B

alance-stereo

R

egegur-mono

B

alance-mono

13.

C

heckphone-jack.

14.

C

heckprotectiononbothchannels.

15.

C

hecknoisewithspeaker.

16.

P

utthejumpersandvaristor

forrequiredA.Cvoltage.

17.

P

lugunitagainandcheckrailandpre-drivervoltage.

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CA-201

DIAGRAMS

Class-29

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CA-201CONTROLLER - B037XR05 (1)

Class - 30

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CA-201

Class - 31

CONTROLLER - B037XR05 (2)

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CA-201

Class - 32


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CA-201

Class - 33


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CA-201CAPACITOR - B036XR03

Class - 34

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CA-201INPUT - B035XR02

Class - 37

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CA-201TOGGLE SWITCH - B034XR06

Class - 38

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Documents

CA-201