Harman kardon 800+ User manual

The Harman-Kardon

Model

800+

AM/Stereo FM

Multichannel Receiver

·· Technical Manual

harman/ kardon

ALIGNMENT

PROCEDURES

Step

1

2

3

4

5

6

7

8

9

10

11

12

13

FM IF & RF

ALIGNMENT

INSTRUMENTS:

FM

S.S.G.,

modulator

with

400Hz

at

100%, V.T.V.M., Oscilloscope, and Distortion Meter.

NOTE: Set TONE

control

to

flat response (or mechanical

center

of

both

of

BASS control and TREBLE control)

Set FUNCTION selector

to

FM.

SIGNAL

SOURCE

OUTPUT

METER

ADJUST

FOR

Check mechanical zero center

of

TUNING

indicator,

M101 at POWER

switch

OFF.

Adjust

it if

necessary.

None (FM

ANTENNA

TUNING

indicator,

Zero

or

center

indication

ON

terminals opened).

Tuning

connect oscilloscope TOP adjuster

of

T101

TUNING

indicator

M101

control

at no signal. and

V.T.V.M.

to

(or

RAT

CAN)

observing noise

output

with

TAPE

OUT.

output

meter.

Same

as

above. Same

as

above.

Bottom

adjuster

of

T101.

Maximum

noise

output

on

V.T.V.M.

Same

as

above.

Same

as

above. TOP and

bottom

ad-

Same

as

above.

justers

of

'IF'

in

FRONT-END

Connect

SSG

to

FM

ANT

terminal,

with

no

signal Same

as

above. Readjust TOP adjuster Zero

or

center

indication

ON

(or

SSG

OFF).

Tuning

of

T101.

TUNING

indicator,

M101.

control

at no signal.

Set

SSG

output

to

88MHz,

Same

as

above. LO, LR and

LA

in

Maximum

noise

output

on

Tune radio

to

88MHz

of

FRONT-END.

V.T.V.M.

SSG.

Set

SSG

output

to

106MHz,

Same

as

above. TCO,

TCR

and

TCA

in

Same

as

above.

and

tune

radio

to

106MHz.

FRONT-END.

Repeat step 6 and 7

for

best sensitivity.

Use

very weak signals

of

Same

as

above.

LA

and

LR.

Zero

or

center

indication

of

88MHz.

TUNING

indicator

M101.

Tune

radio

to

88MHz.

Use

very weak signals

of

Same

as

above.

TCA

and

TOR.

Same

as

above.

106MHz.

Tune radio

to

106MHz.

Repeat step 3

through

5

for

best setting

under

SSG

connected

but

no

signal.

Use

98MHz,

1

mV

signals

Minimum

harmonic

distortion

from

SSG

modulated

with

Connect

distortion

Bottom

adjuster

of

on

distortion

meter keeping

400Hz

at 100%.

Tune

radio meter,

V.T.V.M.

and

T101.

noise

output

to

3V

on

to

98MHz.

(Note:

If

oscilloscope

to

V.T.V.M.

(adjust

VOLUME

another signal exists, SPEAKER

out.

CONTROL

VR301 through

shift

to

quiet

point)

VR601,

if

necessary).

Observe

output

waveform

with

oscilloscope

at

S/N =

20

to

30dB.

Observed

waveform

will

be

(1), (2)

or

(3), below:

(1)

~

No,se

121

\ (3)

~

MODU-

LATING

FREQ.

400Hz.

Same

as

above. Same

as

above.

UNACCEPTABLE

ACCEPTABLE

Wave

form

(1) and (2)

will

result

from

misalignment.

(1)

To

correct,

carefully

adjust

two

adjusters

of

IF

on the

FRONT-END

and

bottom

adjuster

of

T101.

(2) Check

TUNING

meter zero center again under

no

signals

of

SSG.

If

necessary, adjust the zero

point

with

TOP

adjuster

of

T101.

(3)

For

ANTENNA

input

of

1

mV

from

SSG,

distortion

shall

be

adjusted

with

bottom

adjuster

of

T101,

if,

necessary.

-2-

l

I

r

)

AM ALIGNMENT PROCEDURE

INSTRUMENTS: SSG,

modulated

with

400Hz

at

30%, V.T.V.M.,

AM

IF

Sweep

Generator, and Oscilloscope.

NOTE:

Set

FUNCTION selector

to

AM.

Connect

signal source

to

a

loop

placed

to

radiate signals

into

AM

ANT

LOOP STICK.

SIGNAL

SOURCE

CONNECT

OUTPUT

Step

OUTPUT

METER

TO

DIAL

SETTING

ADJUST ADJUST FOR

1

455kHz

of

sweep

V.T.V.M.

& oscillo- Quiet

point

near

T162

(Black)

Maximum

and

-generator scope

to

TAPE

OUT

1600kHz

symmetrical

2

T161,

input

side pattern on SCOPE

>---

3

T161,

output

side

4 Repeat step 1 through 3

for

best sensitivity and symmetrical pattern on oscilloscope.

5

525kHz

of

S.S.G.

V.T.V.M.

to

TAPE

Gang

fully

closed

L162

(Black)

OUT

1 and

distortion

meter together

with

Maximum

output

6

1700kHz

of

S.S.G. oscilloscope

to

Gang

fully

opened

AM

oscillator

speaker

out

trimmer

7 Repeat step 5 and 6

for

best sensitivity

8

600kHz

of

S.S.G.

600kHz

AM

ANT

LOOP

Same

as

above

STICK

Same

as

above

9

1400kHz

of

S.S.G.

1400kHz

AM

ANT

trimmer

10 Repeat step 8 and 9

for

best sensitivity.

SIDE CHAIN ALIGNMENT FOR MUTING & STEREO THRESHOLD

Step

SIGNAL

SOURCE

OUTPUT

METER

11

ADJUST ADJUST FOR

14 Repeat 1, 2 and 3

for

optimum

setting.

15

STEREO

THRESHOLD

1.50V

on

DC

voltmeter

VR012.

-Connect

SSG

to

FM

ANT

D.C.

Voltmeter

16

terminal.

from

ground

to

L101 and

SSG

output.

Maximum

on DC

voltmeter;

Quiet

point

near

98MHz.

R141.

keep

DC voltage

to

1.50V

SSG

set on

CW

by adjusting

SSG

output.

TUNING

indicator,

M101

must indicate zero center

all times.

17 Same

as

above,

but

set

MUTING

ADJUSTER,

Finally,

audio

output

must

SSG

output

to

26dB.

VR

101. drop

by

3dB

with

FM

(or

20

µ.V)

MUTING

switch ON.

18 Check again zero center on

TUNING

INDICATOR,

M101

with

no

signal.

-3-

MPX

ALIGNMENT

PROCEDURE

Step

1

f----

2

-3

f----

4

5

6

7

8

9

10

11

INSTRUMENTS: S.S.G., Stereo Generator,

V.T.V.M.,

Oscilloscope, Oscilloscope

of

low

input

capacitance, and

Distortion

Meter

L + R = 90%,

PILOT=

9%,

modulation

NOTE: Set

TONE

control

to

flat

response (or mechanical center

of

both

of

BASS

control

and

TREBLE

control).

Set

FUNCTION

selector

to

FM

STEREO.

SIGNAL

SOURCE

OUTPUT

METER

ADJUST

FOR

L102

For

maximum

on

scope

connected

to

T.P.

at

Connect

SSG

modulated

Connect

low

input

L103

minimum

resistance

(or

with

MPX

Generator

to

capacitance osci

11

oscope

extreme

counter

clock-

FM

ANT

terminals.

to

TEST

POINT

TP.

L104

wise)

of

VR101

and

Output

level: 1

mV

Connect

oscilloscope

maximum

resistance

(or

Pilot

level: 6%

to

TAPE

OUT

of

extreme

clockwise

of

both

channels.

VR102.

VR101

Adjust

VR101

until

STEREO

INDICATION

lights.

The

INDICATION

will

go

out

for

the

Pl

LOT

level

of

lower

than

6%.

Same

as

above,

but

PILOT

LEVEL:

9%,

L102

For

maximum

stereo

only

RIGHT

channel separation.

is

modulated

with

main

signal

of

1

kHz.

Change

main

signal

For

maximum

stereo

modulation

to

LEFT

L102

separation.

channel.

Repeat step 5

and

6,

and

if

unbalance

of

stereo separation between

LEFT

and

RIGHT

exists,

correct

it

with

VR102.

Check

PILOT

level

that

STEREO

INDICATION

liglits

at

5.5%

to

6.5%

of

PILOT

LEVEL

andthat

the

INDICATION

does

not

light

at

1%

of

P.L.

Return

Pl

LOT

LEVEL

to

9% and

check

stereo separation

at

1

00Hz

and

1

0kHz.

At

32dB

(40µV)

of

SSG

output,

adjust

STEREO

THRESHOLD,

VR012

for

STEREO

INDICATION

ON.

Remove oscilloscope

from

test

point,

TP and

adjust

again L

104

for

best stereo

separation.

POWER AMP.

UNIT

(Alignment

of

Idle current of output transistors).

INSTRUMENTS:

High sensitivity D.C.

voltmeter

or

synchroscope.

NOTE: Set

VOLUME

control

to

minimum

output.

No

signal.

Step

CONNECT

M.S.

VOLTMETER

TO

ADJUST

FOR

1 Across

emitter

of

0347

and

collector

of

0348.

VR341

5.5mV

on

voltmeter.

2 Across

emitter

of

0447

and

collector

of

0448.

VR441

Same

as

above.

3 Across

emitter

of

0547

and

collector

of

0548.

VR541

Same

as

above.

4 Across

emitter

of

0647

and

collector

of

0648.

VR641

Same

as

above.

-4-

CD-4 ALIGNMENT

PROCEDURE

If

a frequency counter

is

available:

1.

Set

the

function switch

to

the

"Phono"

position and

put

shorting plugs

in

the

phono inputs and connect the counter

to

the

test

point

near

IC

102 and Ground.

2. Connect power and turn

the

unit on. Allow a 5 minute warm-up time.

3. Adjust

VR

105

to

obtain a free running frequency of

30.0

kHz.

4. Repeat using

the

test

point

near

IC

202 and

VR

205.

5. Disconnect power and remove measuring equipment.

In the

absence

of

a counter, an accurate source

of

30kHz

signal

at

a level

of

1-2m

V

is

required,

or

a CD-4 record may

be

used,

according to the followingprocedure:

The following adjustment sets

the

center frequency

of

the demodulation phase locked loop

to

30kHz:

1. Connect a clip lead from

the

cathode

of

CR

302

to

Ground. (This disables the muting circuit).

2. Connect a 100µf capacitor from Pin 2

of

IC

102

to

ground (the foil

on

the

perimeter of the board).

If

a polarized

capacitor

is

used,

the

positive lead

is

connected

to

the

IC.

DO

NOT SOLDER DIRECTLY TO THE

IC.

3. Turn

the

"CD-4 Separation" controls fully counterclockwise.

4. Set

the

Function switch

to

"Phono"

position, and the Mode switch

to

"Mono."

5. Connect

the

signal generator

or

a turntable with a CD-4 cartridge and record

to

the

input.

6. Connect a speaker

to

the

left

front

speaker terminals and turn on the speaker switches on the front panel. Or, connect a

set of headphones

to

the

front

headphone jack.

7. Connect power and turn it on. Allow it

to

warm-up for 5 minutes.

8. Set

the

signal generator

to

30kHz

at

1mV. If a signal generator

is

not

available, a Harman/Kardon test record or

other

CD-4 record may be used

as

a source of 30kHz signal. It

is

essential

that

an UNMODULATED signal be used. The test

record

is

ideal

in

this regard, since long passages of unmodulated carrier are available for channel balancing. On a

commercial disc,

the

grooves between selections may be used.

9. Adjust

the

volume so

that

a beat note can be heard.

NOTE: A beat may

not

be heard if

VR

105

is

already adjusted for zero beat

or

if

the

beat

is

out

of

the audible

range.

If

a beat

is

not

heard when rocking

VR

105 through its extremes, there

is

a problem with the unit.

10. Adjust

VR

105 for zero beat.

NOTE: Within a small range

of

this adjustment the beat will disappear. This

is

due

to

the phase locked loop

locking

to

the

input. Set

VR

105

to

the

approximate center of this range.

11.

Disconnect power and remove

the

1

OOµf

capacitor and jumpers.

12. Repeat this procedure, substituting:

VR

205 for 105,

IC

202 for 102.

NOTE: L101 and 201 are factory set and need

not

be adjusted.

If

they

are misadjusted by mistake, they can

be

set

approximately 1 turn above

the

top

of

the form.

-5-

CD-4 ANRS ALIGNMENT

PROCEDURE

This procedure must be

performed

if

any

components in the

ANRS

are replaced.

1.

Unsolder

the

jumper on

the

bottom

of

the board

that

connects

to

the negative lead of C 139.

2.

Connect an audio oscillator through an attenuator and a 1Oµf, 25 volt capacitor

to

the

test point

at

the jumper

in

Step

1.

The positive lead

of

the

capacitor connects

to

the

CD-4

board.

3. Connect a clip lead from

the

cathode

of

CR

302

to

Ground. (This disables the muting circuit.)

4. Place the function switch

in

the

"Phono"

position.

5. Connect power

to

the

unit and turn it on. Allow it

to

warm-up

at

least 1 minute.

6.

Set

the

AN

RS

controls as follows: VR 101, 102

at

center, VR 103 fully clockwise,

VR

104 fully counterclockwise.

7.

Set

the

frequency

of

the oscillator

to

30Hz and

the

level

to

140mV

(-15dBm)

and observe the

output

level

at left front

tape

output.

It should be 200mV

(-12dBm)

±2dB.

This level

is

a reference

to

which the

following

readings are compared:

Step To Obtain

at

No. Set Frequency

To

Set

Level

To Adjust Tape

Output

8 4kHz 125mV

(-1db)

VR

102

-1

+2dB

-1dB

9 4kHz 31mV

(-13dB)

VR

104

-21

±1dB

10 Repeat 8 & 9 until no further improvement

is

noticed.

11

4kHz 55mV

(-8dB)

Check

-11

±1dB

12 4kHz 14mV

(-20dB)

Check

-32

±2dB

13

If

11

and 12 are

not

within limits, return

to

Step 8.

14 630Hz 31mV

(-13dB)

VR

103

-20

±1dB

15 630Hz 140mV (0dB)

VR

101

0 ±1dB

16 Repeat 14 & 15 until

no

further improvement

is

noticed.

17 630Hz 63mV

(-7dB)

Check

-10

±1dB

18 630Hz 14mV

(-20dB)

Check

-30

±2dB

19 Repeat Steps 8

thru

18 until no further improvement

is

noticed.

20 Disconnect power and oscillator

21

Remove

the

clip lead from

CR

302

to

Ground

22 Reconnect

the

jumper

that

connects

to

C139.

23 Repeat, substituting: C239 for 139,

VR

201

for 101,

VR

202

for 102,

VR

203 for 103,

VR

204 for 104, Right for Left.

NOTE: L102 and

202

are factory set and do

not

require adjustment.

If

they are misadjusted by mistake, set them about

1/3

of

the

way from the top.

-6-

SQ

ALIGNMENT

PROCEDURE

INSTRUMENTS:

AF

Oscillator, 2-V.T.V.M.,

and

Oscilloscope

NOTE:

Set

MODE

selector

to

ENHANCE

STEREO.

Keep

AF

oscillator

output

to

1.0V

at

1

000Hz

during

alignment.

Step

SIGNAL

SOURCE

OUTPUT

METER

ADJUST

FOR

1

Connect

AFO

to

LT.

Connect

scope

and

VR201

1.0Von

V.T.V.M.

to

LF

2

Same

as

above.

Connect

scope

and

VR202

1.0V

on

V.T.V.M.

to

LB

3

Connect

AFO

to

RT

Connect

scope

and

VR203

1.0V on V.T.V.M.

V.T.V.M.

to

RF

4

Same

as above.

Connect

scope

and

VR204

1.0V on V.T.V.M.

V.T.V.M.

to

RB

CHANGING

THE

STEREO/QUAD

(4-CH) SWITCH

The

receiver

operates

22W x 4-CH

when

the

switch

is

set

QUAD (4-CH) side

and

44W

x 2-CH

when

the

switch

is

set

STEREO

side

at

rated

power.

The

switch

is

set

at

QUAD (4-CH) side.

If

you

want

more

output

with

stereo

signal, please change

the

switch

setting

from

QUAD (4-CH) side

to

STEREO

side.

To

change

the

switch

setting,

remove

the

black

screw

at

left side

of

the

switch

and

remove

a black plate

for

fitting

the

switch

knob.

When

the

unit

operates

in

STEREO

mode, signal

output

comes

only

to

LEFT

FRONT

and

RIGHT

FRONT

speaker

terminals

(No signal

at

LEFT

BACK

and

RIGHT BACK terminals).

STEREO

4-CH (QUAD)

---------

----------------

Black Plate

CAUTION:

WHEN

IN

STEREO

OUTPUT

MODE (2-CH)

SPEAKERS

CANNOT

UTILIZE

A COMMON

GROUND.

SWITCH LEGEND

S1

FUNCTION

S7

HIGH CUT

S2

MODE

SB

CONTOUR

S3

LOW CUT

S9

DOLBY

S4

FM

MUTING S10 SPEAKERS

MAIN

S5 TAPE MONITOR

S11

STEREO

QUAD

S6

SPEAKERS REMOTE

S01

POWER

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Harman Kardon 800+ User manual

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