Yamaha CA800ll SERVICE MANUAL

cA-800tr

CONTENTS

CIRCUITDESCRIPTIONS... 1 PARTIALDISASSEMBLY...

EXTERNAL

INTERNAL

VIEW . 2

VIEW

.

SPECIFICATIONS. 5

ADJUSTMENT PRINTED

FUNCTION

TONE CONTROL CIRCUIT BOARD

FILTE

MAIN AMP

CIRCUIT BOARD

R CI

VOLUMECIRCUITBOARDNAOG53I

POWER

ELECTROLYTIC

POWER

OPERATION

REAR

BLOCK DIAGRAM

OVERALL SCHEMATIC PARTIAL

PARTS

CIRCUIT BOARD NAO6679 CIRCUIT BOARD NAO6679

PANEL

CHANGES MADE ACCORDING

CATALOG

MAIN AMP

OF

CIRCUIT BOARD

CIRCUIT

NAO6623

BOABD

NAO6773

RCU

IT BOARD NAO6535 9

CIRCUIT

BOARD NAO654O

.......10

CIRCUIT

SWITCH CIRCUIT

CIRCUIT

BOARD

BOARD NAO6778

NAO6547

BOARD NAO6354

DIAGRAM

TO DESTINATION

10

11

12 13 15 17

1

4

6

8

9

CIRCUIT

Refer to

1.

2.

3. ACLASS AND B

I

4.

CA-1000's

CONTINUOUS LOUDNESS CI BCUIT SPECIAL

PROTECTION

SERVICE MANUAL

YAMAHA

TONE CONTROL SYSTEM

CLASS OPERATION

CIRCUITS

PARTIAI

Refer to CA-1000's SERVICE

MANUAL.

DESCRIPTIONS

DISASSEAABLY

cA-800II

FRONT

PANEL

EXTERINAT

VIEW

99I

ttt

lll

.ll,*l*

ln

Mruffi

'i

tl

l.

+a#l+ffi

T 1;

'le

,@

&,..H8

TT

tl

*:

I

[s

EJ+i,,"+i.-',,

[-:"'

lru

REAR

PANET

66

du-?

{.r

|

+.r{!+.

lrlMF

B(rcr

6

cA-800II

FRONT

BASS TONE

O

TREBLE TONE CONTRoL & TURN OVER SWITCH

O

MODE

€)

TAPE SELECTOB

O

FUNCTION

O

LoUDNESSCONTROL

o

BALANCE

O

VOLUME

€)

PANEL

CONTROL & TURN OVER SWITCH

SELECTOR

CONTROL

pOwER

G,

POWER

@

HEADPHONE JACK

O

(D

SPEAKERS SELECTOR

(D

A CLASS/B

(B

LOW FILTER SWITCH

(D

HIGH FILTER

(D

AUDIO

INDICATOR LAMP

SWITCH

CLASS OPERATION SWITCH

MUTING SWITCH

SWITCH

_r_

REAR

nux

O

eux

O

TUruER

@

PHONO

O

PHONO

O

TAPE

O

TAPE

o

PRE

€)

PANEL

2 INPUT

1

B CONNECTOR/JACKS

ACONNECTOR/JACKS

OUT/MAIN IN JACKS

JACKS

INPUTJACKS

2 INPUTJACKS

1 INPUTJACKS

SPEAKER TERMINALS

O

VOLTAGE SELECTOR

@

(D

PRIMARY FUSE

GROUND

@ (E

MICROPHONE

(D

COUPLER SWITCH

(D

AC

TERMINALS

CORD

JACKS

3

cA-

800

TOP

tr

INTERNAL VIE\,Y

VIEW

BOTTOftT VrEW

VOLUME CIRCUIT BOARD

O

FTLTER CTRCUTT BOARD

o

ELECTRoLYTIC

O

(NA06547)

ELECTROLYT|C CAPACTTOR

@

roruE

O

@

O O O

(E

CoNTRoL

UAIru AMP HEAT SINK FUNCTION

REAR PANE L

PoWER TRANSFoRMER

CAPACIToR

CIRCUIT

BOARD

(NA06531)

(NA06535)

CIRCUIT BoARD

(

1O,OOOtr/F/5oWV)

EOARD

(NAO654O)

(NA06623)

BoARD

(GA6o882)

(NA06773}

(NA06778)

powEn

O

HEADPHONE

O

SPEAKE E SE LECToR

O

opeRerroN swrrcH

OPERATION

O

VARIABLE

O

A1ooKf,) x

POWER

o

CHASSIS

o

POWER

0

SPEAKE R

@

swrrcH crRCUtr

RESISIOR

2)

TRANSISTOR

CIRCUIT

PROTECTION

BoARD

JACK

SWITCH CIRCUII BOARD

(Volume/Batance

BOARD

(N406679)

CIRCUIT RE LAY

(NA06687)

(NA06354)

Control:

(HC.2P

HB250KQX2

)

SPEGIFIGATIONS

cA-800II

POWER

AMP SECTION

CIRCUIT SYSTEM

DYNAMIC POWER

OUTPUT

2OHz

-2OkHz

Both Channels Driven

(Both

l kHz

{One

TOTAL

B

Class

B

HABMONIC DISTORTION

at Bated

at 1W

Class

A Class at Rated

(IHF,

8T2)

Channels Driven)

Channel Driven)

Output O.1%

Output O.O4o/o

Output O.1Yo

A Class at 1W

INTEBMODULATION

:

TkHz: 4:11

\7OHz

B Class at Bated B Class at lW less

A Class A Class at

POWER

(lHF,

B CIass

Bated Power

at

lW less

BANDWIDTH

Both Channels Driven

DISTORTION

Power

A Class

FBEOUENCY

B

Class

A

Class 2OHz-

INPUT

B

Class

A Class

RESPONSE

SENSITIVITV

INPUT IMPEDANCE

OUTPUT TERMINALS

Speaker Terminals

H eadphone

DAMPING

(1kHz,

S/N

RATIO

(lHF,A

Residual Noise

Jack

FACTOR

8f,)

)

Network)

{8f,I

Pre-Amp + Power

Switched

direct coupled

mentary

160W

B Class,

A Class, 8,f)

B Class, 8O 55W

Ai

B type all stage

pure

SEPP OCL

8,f)

A Class,Sf,) lOW x 2

B Class,8,f) 6OW

B Class,4O

A Class, 8f,)

o.o2%

O.1%

than 0.O5%

O.1%

than 0.O5%

0.5%

)

lAHz--lOkHz

10Hz

-100kHz

1

20Hz

775mV

345mV

1 00kQ

A,

4c)

70

100d8

0.8mV

B,

-

A+8,

*

00kHz

100kHz0+

160

Amp)

comple

circuit

5OW

iOW x 2

90W 10W

0t

?dB ?dB

INPUT SENSITIVITY AND IMPEDANCE

Phono

1 3mv/

Phono

2 3mv/50kf,)

Phono Maximum

Capacity

Tuner

x

2

Aux,1,2

PB

Tape

A, B

OUTPUT LEVEL AND

x

2

Tape Rec Out A, B l2OmV

Pre

Out 115mV lzk0

(at

lnpul

l kHz)

IMPEDANCE

30kf)

310mVrms

120mV/50kO

120mV/5OkC)

120mV/50kf,)

l2k0

soko

(87OmVp-p)

lookr)

FREOUENCY RESPONSE

(

Phono

RIAA equalization)

Tuner, Aux. Tape

TONE CONTROLS

Bass

Treble

(Turn

over

AUDIO MUTING

= 25OHzl

over

PB

= 2.5kHz)

30Hz-1SkHz

2OHz-20kHz+$r69

tl5dB

50Hz

25OHz,5OOHz

1OkHz

z,

2.5kH

-20d8

+l0dB

+

3dB

+0.2dB

FILTERS

Low

H igh

LOUDNESS

S/N RATIO

Phono Phono

Tuner,

AUXILIARY

Transistorized Speaker Protection Operation Tape Dubbing

CONTROL

{lHF,

i

2

Aux, Tape

CIRCUITS

Protector

Switch

Network)

A

Circuit

2OHz, TOHz

6k1z,12kHz

Continuous

be treated as

BOdB

80dB 90dB

(ASO

(Voltage

direction relay A Class/B Class switchover Tone

Jump

(-12

loudness

detection

Switch

dB/oct.)

(

6 dB/oct.)

control

curve

limiter system)

drive system)

to

Continuous Loudness GENE RAL

Power

Source

AC 1 10. 1 1't, 130,

220, 240V

50-6OHz

Power

Consumption Rated

E uropean

DIMENSIONS

WEIGHT

model

450W

436(W)x

kg

14.0

1 44(H

)x323

m/m(D)

PRE.AMP

SECTION

CIRCUIT SYSTEM

Equalizer

Tone

Amp

Control

Amp

Specifications

sub.iecr to change

without notice

cA-800Ir

ADJUSTAAENT

I

Turn the PrelMain

I

After the

minutes

a. Mid-Point Potential

Set the voltage to

0v

b.

B Class ldling

Set the

+0.01V

TP3

TP4 :

c.

A Class ldling

Set the

power

before

measuring,

between SP Out terminal

+0.01v

Operation

with V

Current Adjustment

voltage

between

with VR602.

(+)

:

(-)

Current Adjustment

Operation switch to Class A.

amp. coupler switch

switch is turned

to be

su.re of the most

Adjustment

.

R601

switch

to

TP3

Normal.

and

TP4 to 0.047V

OF AAAIN

BEFORE

Off.

wait

on,

3-4

and

E

AAAP

CIRCUIT

MEASUREMENT

stable operation.

r

Do not connect

tance

to the speaker terminals.

the voltage

Set

+o.obv

:

TP3

TP4 :

d. Repeat

each is within

Note

Turn the volume

Pay

point.

test

speakers or dummy load resis-

between

with VR6o3.

(+)

(-)

procedures

the allowable limits.

close

attention to the

BOARD

TP3 and TP4 to

a-c above several

gently

during adjustment.

polarity

times

of each

0.85V

until

mArN

150

()

R60r

4.7K

@ @@

,--

ovR6o2

vreo3

NAO6540

Pv

EiN EN

c60l

2,2468.P

A BC

#

o o

TP4

I1-5O-B+B

@

-"'mm

E oUT

oo

1+Lz)

Ym@

:7pu

oo

ELECTRONIC VOITMETER

oo

o

ELECTRONIC VOLTMETER

POINT

MID

POTENTIAL

ADJUSTMENT

(ov

o.olv: vR60l)

f

CURRENT

IDLING

AT"B" CLASS

(

o.o47v

to.o

AT,A'CLASS

(0.85V

fO,O5V;VR605)

1I!-199r4-

ADJUSTMENT

I v: vR6O2)

rRero

rR6rz

F60t

3.t5A 250V

L60t

3!H

6

cA- 800 tr

FUNCTION

REAR

TO

CIRCUIT

P'lR

:P'1L,

CIRCUIT BOARD

PANEL

BOARD

:P2L, F2R

PRINTED

NAO6623

CIRCUIT BOARD

TO FIEAR PANEL CIFICUIT

BOARD

-l

AO FILTER

CIRCUIT

BOARD:

#

5PC

TO TONE CONTROL

+B

CIRCUIT BOARD'LI, RI

rS

7

cA-aootr

TONE

CONTROI

CIRCUIT

o I'--t

oo

^co

-t=

+

9ol

O|.].l

>4

a

o

BOARD

FUNCTION

TO

CIRCUIT BOARD

NAO6773

TO VOLUME

CIRCUIT BOARD

,1'

OR 4

a

FIITER CIRCUIT BOARD NAO6553

TO VOLUME

CIRCUIT

(YE)

ffi-#

'tf

|

BOARD

TO TONECONTROL

CIRCUIT BOARD

(BR)

CIRCUIT

REAR

TO

0 4 a ronr4

PANEL

BOARD

€{}

sm*

@*m

trffiK

cA-800II

#

E

TIAIN

ATIP GIRCUIT BOARD NAO654O

TO POWER

CIRGUIT

,9E,1

TO ELECTROLYTIC

BOARD

BL

TO

POWER

T BOARD

REAR PANEL

TO

CIRCUIT

WH

(RE)

TONEJUMP

BOARD

MUTING

TO OPERATION

SW

.GY

(vl

CIRCUIT BOARD

9

cA-aoo

II

YO1UAAE

TO

CIRCUIT

TONE

CONTROL

TO FILTER CIRCUIT BOAHD

BI

: LI.

BOARD NAO653I

CIRCUIT

BOARD

I

Ro

Lo

ELECTROLYTIC CAPACITOR GIR.CUIT

FUNCTION

TO

CIRCUIT

TO MAIN

CIRCUIT BOARD

CIRCUIT

BOARD

AMP

TO

POWER

BOARD

TO

SPEAKER

TERMINAL

TO POWER

TRANSFOMER

BE

OR

RE

V/H

GY

OR

BOARD

NAO6547

*

::

{*

x,

{*

s

PO\i{ER

CIRCUIT BOARD l!{A0,6679

BL

RE

YE

GR

WH

BE

GY

BR

BL

.l

TO

PHONES JACK

TO ELECTROLYTIC

.

R

CAPACITOR

CIRCUIT BOARD

SELECTOR SWITCH

TO

SP

To MArN

crRCUrT BOARD

AMP

OUT

-]

TO SP SELECTOR

TO PHONES JACK L

TO POWER SWITCH

CIRCUIT

BOARD

SWITCH

I ro unrru nup

crncurr BoARD

_.1

ELECTROLYTIC CAPACITOR

TO

CIRCUIT BOARD

POWER TRANSFORMER

TO

.

B

to

cA-aooII

OPERATION SWITCH

T

r<P

or6

LO

-t

oo 1a

m

-{

o-t

5

,

;

=o

rc)<

oC> +-12

'@r

o5

in

0

eifrE

ESir-

oc)?

lrl

Eo-l

o>o

ilp

tr!-im

"{o,fi

ooi

"3d

CIRCUIT BOARD

NAO63s4

; ii,6

o

o-{

_;o

"s

se;

t

z

E}

*i

I

R.EAR PANEL

?Jj.:"-e

CIR.GUIT BOARD NAO6778

C)r

C)

-o

;-1

go

P<

:i>

sr

!-

--

g=

st

trs

rC2

o t

>-l Qo

cim

Th

o9 dd

-r<

8ri

n

o1

z,o

o

C,-T

=C,'2. E() o-l

>^

4=

It

cA-800II

EEE

XXZZr)()ZZXX JNS

+r{I

+BBB

momo

c!c

l@{

ULJ

J{

>H'B

mm

BLOCK

T-o

5

9

FUNCTION

TAPE SELECTOR

DIAGRATI

=

FUNCTION

5

I

EEE

SNr

r-l

8B8t

omom

cTc-o

-1tr-t(E

LJ

@>>>

{+

UT

mm

,{

r-___J

>-r

<o

aZ

m

o o

z

{

1 o

r

LOUDNESS

COUPLER SW ITCH

SPEAKER

a

! m

x

m

a

@

U''

!

m

A

m

,

a

E

>-r

<o

aZ

m

o

z

{

o

-

!

t

-t

m

{

o

SELECTOR

o

m

x

m

I

@

t2

cA-800II

PARTIAL CHANGES MADE

V

U.S.

& CANADIAN MODELS

V GENERAL

MODEL

ACCORDING

V

SOUTH

AFRICAN

V AUSTRALIAN MODEL

TO

MODEL

DESTINATION

.

RESISTOR

SYMBOL

A METALIZED OXIDATION

n

NO MABK

a

PART NAME

FUSE

RESISTOFI

CEMENT RESISTOR CAFIBON HESISTOR

MOLDED

CEMENT METALIZED

r,5AT25ove20

RESISTOB

BESISTOR

FI LM RESISTOR

.

CAPACITOR

SYMBUL

@

NO MAFIK

o

NO MAFIK

o a

PART NAME

MYLAF

CAPACITOR

CERAMIC

CAPACITOR POLYSTYRENE (BI.POLAFI)

CAPACITOR

LOW.NOISE

CAPACITOR TANTALUM

E LECTROLYTIC

ELECTROLYTIC

CAPACITOB

CAPACITOR

REMARKS

---+*-

.

WIRE COLOR

BL

Black

>

BR ) Brown

>

RE

Red

>

OR

Orange

YE )

Yellow

GR

Green

>

BE ) Blue

ABBBEVIATIONS

Vl > Violet

GY

Gray

I

White

WH >

GG > Light Green

Light Blue

SB > PK

Pink

>

t3

cA-800II

.ff:

tr

I

PARTS

LI

ST

I

t57

C

o

@@

57

22

20.21

cA-800II

57

33 34

35

58

20,21

I5

cA-8001I

heT.

No.

Pan

32 00:00 NA

1

32r00i00

42 00r00 HE 42 00 00

42 00 00i

42

00 HU

00

2i00;00 HU

42 00

i00

42

:00 :00

42 r00:00 HVr' l0:44:70

2100t00

42 00

:00

42 00i00 FP 12

42i00i00i

42 00i00

No

|

06

62: 9(

N,A

06i62i80

15182',20

HE

l5 84

HL

621,2A

131

4 54:74

4 71

HU

47r81

40:4417A

FD

19t35t0(

Ftl

18t41

71 0l

FP

13tUi7

FP

l5i6li0i

FPit6:6417(

Function

Low

7t

Metal

lvletalized Film

t5A

i80

Fuse

-do.-

Polystyrene

t8(

Tantalum Capcitor

Circuit Board #6524'l

-do.-

Resistor

(Hori.

Noise

do.-

Oxide Resistor

Hesistor(1l%)

do.-

-do.-

Resistor

Caprcitor

-do.-

Description

#62916

type) 220K

2.2K9 lW

470O

'l5K,f,

18KS)

47{l

47

(Vert.

type)

pF

10

1oWV

4.7!F 16WV

l

35WV

ttF

F

4.7p

50U/V

O

7.W

47OKA %W

%W

100mA

Q

!

2o/o SOOO?F

1

1% 1800OPF

7z)z?')=lz

:/-t

t1

-)4tw.li

m{t*EiEffi

#.R&tr-i4fi

Yt-/#,

7aA-)t =>+>+,

,>5)vHl+

))72t

U.S. model

(N406341

Except U.S. model

*U

U.S. model

tfi,

Except lH70nn1Fl

Seryrcrng 420000FP 1 56470

Remarks

#62914)

{H200015)

U.S. model

Common

Models

2

42r

3

42i00 00 KA

4

42i00r00i

5

2:00:00 LB

32 i 00r

42 00r00i

l2

6

i2

42r

2r00i00

42

42i00

00

00 MZ

00

i00

00

|

00: 00 HE

100

i00

00 HW

52

!60

30

90

20

Electrolytic

-do.-

Transistor

io.-

Rotary

Switch

do.-

5P

-do--

Function

Connector

Keying Pin

Tone Control Circuit

-do.-

Fuse

Resistor

do.-

F

J 2317417

F 251 Bzt 2

rC

l1r66i3

icil3i45i3

KA

s0i 02i 8(

50 02:ll

r60102180 6P Connector

LB

50r00r50

06: 35i 2r

r

LB

10i01

NA

i06 53 40

NA

i06 177

115182 70 Low Noise Resistor

HE

I5i83

t,20

l0i52i2o

Cap*itor

type) 47

{Vert.

22OpF

(Y

2SC

1 166

(D

2SC

1345

SRZ-O65

SRZ-SG

02145-6.A CIS-sP

Ass'y

Board

#

LC64O71

# 65120

270Kf,,

39OKt2

%W

22OQ 45mA 22OQ

45mA

pF

or GR) or E)

16WV

50WV

%W

E*=>r>1'7

t7/'/A'

E-,

u

-7,(

6P=irr-

P=*rr-

5 7z'22)=)=4

.yt2)t)

J 4

-V

&

a-./.(^fftfi.

l=t-lE,th

E

It

Servicing 420000

uervrcrng

420fi)Oic116510

{o--

ya

TAPE FUNCTION

Except

EUropean

{N406378 #62873}

U.S. model Except U.S. model

FJ

1 37470

European

moget

{H200014)

model

t6

42 00 42

00 00t FP

001

FP

il

tt4

r0

7t

Tantalum Capacitor

61 0

-do.

101l F

pF

1

6.3WV

25WV

(20%)

,>tJv

cA-800rr

10

11

12

Het.

No.

l3

Part

42i

00:00r

42r

00t 00i

42i00i001 42i00r00i

42i00i00i F Jl16t82l2(

42i00100i

42i00i00i

7

42i00i00i

I

2i00t00i 2i00100 rAl07l63l0(

2r00r00i

I

2t00:00

42iooiooi

32100i00i

32looiooi NA

42r00r00r

42100r00r HSrl2i04i2l

No.

i

F P

t61

62i 2

F P

l6t 64t 7

I

FJrl3iSlr0C

FJil4i7tr0(

FJ:16:73i3{

HSit2i04t6(

HSr12104r4{

rC:13r45t4(

i20r0t

KA KA

i50i02i9(

KA

i20ior i6(

i06i53i1

NA

i06l62it

r12i03i4l

HS

Tantalum Capacitor

ElectrolyticCapacitor

Variable

Transistor

-do--

r4(

LeverSwitch

-do.-

Volume

Variable

Description

pF

2.2

pF

-do.-

4.7

(Vert.type)

-do.-

*do.-

-do.-

Besistor

-do.-

Circuit Board

-do.-

Resistor

100K x 2 tiY/l1 100K

2SC1345 2SA 763

SLA 34301

SRZ

045

SLA

32301

#6m62

#65180

B20KS2 x

-{o.- |Z250KOx

50WV

100pF

pF

10

220[F

pF

33

x 2

WIl

(D

or E)

2 W/11 ctick

2, 10A100Kf,}

16WV

25WV 50WV

50WV clicks clicks

x 2

, >,

tba>i>1'

effia>7>rJ

FI3'E'L htt.,,h

t'->r7u

l,r\-71,y,

.f-Urt^>-t-

-rl.:?-7

Ery8fi.

t)

*;

>^HE'I*fi.ffi

)\,

l^.

a

-

fr

TREBLE

BASS

TURN

OVER

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Yamaha CA800ll SERVICE MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual