Harman kardon Hk3500 User manual

The

Harman

Kardon

Model

hk

3500

Stereo

Cassette

Deck

echnical

Manual

harman/kardon

ALIGNMENT

PROCEDURES

ELECTRICAL

ADJUSTMENTS

EQUIPMENT

REQUIRED

Audio

Signal

Generator

Frequency

Counter

V.T.

V.M.

Distortion

Meter

Oscilloscope

OF

WN

=

NOTE:

All

adjustments

should

be

made

under

the

following

conditions

unless

otherwise

noted.

Power

Supply

Voltage

is

AC120V

for

RV

units

(220V

for

MV

units).

Doiby

NR

Switch

is

at

OFF

position.

Test

Tone

Switch

is

at

OFF

position.

EO

Selector

Switch

is

at

LOW

NOISE

position.

Bias

Selector

Switch

is

at

LOW

NOISE

position.

Record

Mute

Switch

is

at

OFF

position.

Tape

Mon

Switch

is

at

TAPE

position.

Subsonic

Filter

Switch

is

at

OFF

position.

Power

Switch

is

at

ON

position.

Bias

Trim

is

at

NORMAL

position.

Microphone

Level

is

0.

Output

Level

is

10.

Signal

Source

is

connected

to

INPUT

LOW.

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

DOLBY

5kHz

200mV

V.T.

V.M.

to

SMT

Vcore

Line

Level

and

SMT

Vcore

V.T.

V.M.

to

TP2

and

Gnd.

CONOARWN

=

—

a

ae

ee

|

WNAO

1.

Adj.

for

23.5mV

on

V.T.

V.M.

V.T.

V.M.

to

neg.

VR11

|

2.

Adjust

so

that

output

at

Dolby

on

is

side

of

C47

and

Gnd.

+8dB

than

output

at

Dolby

off.

V.7T.

V.M.

to

neg.

side

of

C247

and

Gnd.

V.T.V.M.

to

TP7

and

Gnd.

VR211

—

5kHz

to

TP5

and

Gnd.

Play

——-

3.

Adjust

input

for

59mV

on

V.

T.

V.

M.

VR10

(L)

4.

Adj.

output

so

that

output

at

Dolby

on

is

—8dB

than

output

at

Dolby

off.

LS

5.

Adj.

input

for

59mV

on

V.T.

V.M.

VR210

(R)

6.

Adj.

output

so

that

output

at

Dolby

on

is

—8dB

than

output

at

Dolby

off.

a

5kHz

to

TP6

and

Gnd.

AUTO

SHUTOFF

V.T.V.M.

and

TP8&

Frequency

Counter

to

TM905

(On

Auto

Shutoff

Bd.)

and

Gnd.

1.

Frequency

reading

on

counter

should

be

between

154Hz

to

232Hz.

(If

not

within

spec.

change

C907

to

higher

or

lower

value]

2.

Confirm

stopping

within

2.5

sec.

after

the

tape

stops.

ALIGNMENT

PROCEDURES

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

MPX

FILTER]

1kHz

200mV

to

Line

In

19kHz

mv

to

(Low)

Line

1kHz

200mV

(Low)

Line

16kHz

200mV

(Low)}

Line

19kHz

200mV

(Low)

Line

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

PLAYBACK

400Hz

Play/

Tape

1.

Adj.

output

for

775mV

on

V.T.

V.M.

LEVEL

Doiby

Test

Tape

and

Gnd.

Vion.

rear

panel)

(MTT-150)

|

and

Gnd.

rear

panel)

|

V.T.V.M.,

to

(L)

2.

Confirm

that

output

is

1.5V

£1.5dB.

ae!

400Hz

V.T.V.M.

to

TP9

Play/Tape

1.

Adj.

for

1.2V

on

V.T.

V.M.

Dolby

Test

Tape

and

Gnd.

Mon.

VR502

(L)

(MTT-150)

V.T.V.M.

to

TP10

VR602

(R)

and

Gnd.

:

VR504

(L)

2.

Adj.

for

O

vu

on

meter.

boo

vR604

(Fi)

Source

1kHz

200mV

3.

Adj.

for

0

vu

on

meter.

200mv —20dB

VR504

(L)

4.

Adj.

for

—20

vu

on

meter.

1kHz

200mV

VR502

(L)

5.

Adj.

for

0

vu

on

meter.

(Repeat

steps

4

and

5

to

obtain

correct

meter

readings).

1kHz

200mV

6.

Adj.

for

0

vu

on

meter.

200mV

—20dB

VR604

(R)

(|

7.

Adj.

for

—20

vu

on

meter.

1kHz

200mV

VR602

(R)

8.

Adj.

for

0

vu

on

meter.

(Repeat

steps

7

and

8

to

obtain

correct

meter

readings).

V.T.V.M.

and

Source

Play

Line

Level

1.

Adj.

for

O

vu

on

meters.

Frequency

Counter

to

Line

Out

Dolby

On

w/

Filter

L2

(L)

L202

(R)

Line

Level

3.

Adj.

for

O

vu

on

meters.

4.

Confirm

that

16kHz

output

is

more

than

—1dB

of

1kHz

output.

5.

Confirm

that

19kHz

output

is

less

than

—30dB

of

the

1kHz

output.

2.

Adj.

for

minimum

output.

ALIGNMENT

PROCEDURES

SIGNAL

MEASUREMENT

;

iTEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

TEST

TONE

Source

VR3

(L)

1.

Adj.

for

0

vu

on

meter.

Test

Tone

Sw.

400Hz

VRb5

(R)

VR4

(L)

VR6

(R)

Source

Test

Tone

Sw.

8kHz

PEAK

1kHz

200mV

Source

Line

Level

1.

Adj.

for

O

vu

on

meters.

INDICATOR

1kHz

200mV

+2dB

2.

Adj.

for

—20

vu

on

meter.

VR503

(L)

2.

So

that

peak

LED

is

on

at

input

level

+2.5dB

and

off

at

+1.5dB.

VR603

(R)

PLAYBACK

MTT216,

V.T.V.M.

Play

Tape

VR7

(L)

High

Adj.

to

meet

specifications.

(Fig.

A)

FREQUENCY}

MTT116U

or

to

Line

Outputs

Mon.

VRQ

(L)

Middle

CHARAC-

MTT217C

Bias

-

LN

;

TERISTIC

-

EO-LN

VR207

(L)

High

VR209

(R)

Middle

PLAYBACK

V.T.V.M.

to

PlayTape

Confirm

that

the

curve

meets

FREQUENCY

Line

Outputs

Mon.

specification.

(Fig.

A).

CHARAC-

Bias

-

Cr02

TERISTIC

EO

-

Cr02

MTT116K

(CrO2)

1.

Set

variable

resistors

(VR19,

20,

22,

23)

for

bias

adj.

to

center,

BIAS

Frequency

counter

2.

Adj.

for

105kHz

on

Frequency

Counter.

FREQUENCY

to

PT13

and

Gnd.

AND

TRAP

3.

Confirm

105kHz

=3kHz

when

switch

is

at

any

position.

4.

Adj.

for

minimum

output.

V.T.

V.M.

to

Line

Rec/Play

Output

Tape

Mon.

L203

(R)

ALIGNMENT

PROCEDURES

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

Do

ee

a

ree

ae

a]

V.T.V.M.

to

TP13

L4

(L)

and

Gnd.

V.T.V.M.

to

TP15

204

(R)

and

Gnd.

V.T.

V.M.to

TP11

L5

(L)

and

Gnd.

V.T.V.M.

to

TP12

L205

(R)

and

Gnd.

BIAS

TRAP

(REC.)

1.

Adj.

for

maximum

output.

2.

Adj.

for

minimum

output.

BIAS

LEVEL

1.

Adj.

for

10mV

on

V.T.

V.M.

V.T.V.M.

to

TP13

VR22

(L)

and

Gnd.

.

VR23

(R)

V.T.

V.M.

to

TP15

and

Gnd.

Test

Tone

V.T.V.M.

to

Line

Rec/Play

VR17

(L)

2.

Adj.

for

same

level

at

both

source

and

400Hz

(Maxell

Output

Bias

-

LN

{on

front

tape

mon,

positions.

UDXLI)

EQ-LN

panel)

Test

Tone

Sw.

400Hz

VR217

(R)

(on

front

panel)

V.T.V.

M.

to

Line

Rec/Play

3.

Adj.

for

—20

vu

on

meters.

Output

Tape

Mon.

Bias

-

LN

Bias

Trim

4.

Note

the

line

output

level

when

obtaining

maximum

output.

(Return

bias

trim

pot.

to

center

detent).

VR23

(L)

VR22

(R)

5.

Increase

bias

level

so

that

the

fine

level

output

drops

2.5dB

below

the

maximum

line

output

level

from

step

4.

V.T.V.M.

to

TP13

Rec.

VR19

6.

Adj.

bias

level

for

+2dB

than

the

bias

and

Gnd.

Bias-FeCr

level

at

Low

noise

position.

6.3kHz

200mV

VR20

7.

Adj.

bias

level

for

+4dB

than

the

bias

Cr02

—

at

low

noise

position.

BIAS

FREQUENCY

AND

TRAP

V.T.V.M.

to

TP13

Rec.

Bias

Trim

and

Gnd,

V.T.V.M.

to

TP15

and

Gnd.

Cr02

Confirm

bias

frequency

and

bias

trap

adjustment.

BIAS

TRIM

Confirm

that

bias

level

changes

from

—30%

(max.

—45%)

to

+30%

(max.

+45%

ALIGNMENT

PROCEDURES

ADJUST

INSTRUCTIONS

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

REC

LEVEL

1kHz

200mV

V.T.V.M.

to

Line

Level

1.

Adj.

for

0

vu

on

meters.

(LN)

Out.

Rec/Play

VR17

(L)

(on

2.

Adj.

for

O

vu

on

meters.

Mon.

front

panel)

VR217

(R)

(on

front

panel)

3.

Adj.

for

O

vu

on

meters.

(FeCr)

VR14

(L)

VR214

(R)

(Cr02)

VR16

(L)

WAVE

1kHz

20mV

Rec/Play

VR18

(L)

(square

wave)

VR218

(R)

4.

Adj.

for

0

vu

on

meters.

Oscilloscope

to

Line

Output

2.

Adj.

for

obtaining

minimum

tilt

and

maximum

rise

time.

I~

LIN

Acceptable

Unacceptable

REC/PLAY

1kHz

200mV

V.T.

V.M.

to

Line

1.

Adj.

for

0

vu

on

meters.

all

_

FREQUENCY

|

to

Line

In

Out

CHARAC-

(Low)

TERISTIC

es

(LN)

20Hz

-

17

kHz

Rec/Play

VR12

(L)

.

Adj.

to

meet

specifications

(Fig.

2)

200mV

-

30dB

Mion.

EO-LN

VR212

(R)

Bias

-

LN

Rec/Play

Mon.

EQ

-

FeCr

Bias

-

FeCr

VR13

{L)

VR213

(R)

.

Same

as

above

(Fig.

3)

Rec/Play

Mon

EQ

-

Cr02

(Cr02)

.

Bias-Cr02

SQUARE

WAVE

VR15

(L)

VR215

(R)

4.

Same

as

above

(Fig.

4).

Confirm

square

wave

test.

When

adjusting

again,

confirm

Rec/Play

frequency

characteristic.

ALIGNMENT

PROCEDURES

MECHANICAL

ADJUSTMENTS

1.

REC/PLAY

READ

ADJUSTMENT

(1)

Adjust

screw

(A)

so

that

the

chip

of

the

head

gauge

(M-300)

does

not

touch

the

tape

guide

as

shown

in

figure

2.

(2)

Make

the

mechanical

assembly

stand

and

adjust

screw

(B)

as

shown

in

figure

3.

NOTE:

Never

fail

to

confirm

the

above

adjustment

(1)

when

adjusting

screw

(B).

(3)

Connect

VTVM

to

line

output

jacks

and

play

back

10

kHz

test

tape

(TEAC

MTT114).

Adjust

screw

(C)

so

that

the

output

on

the

VTVM

will

be

maximum

and

have

a

little

level

change

(less

than

1

dB)

at

both

channels.

NOTE:

Never

fail

to

confirm

the

above

adjustments

(1)

(2)

when

adjusting

screw

(C).

(4)

Repeat

steps

1

through

3

until

being

able

to

confirm

above

all

adjustment

without

adjustment.

LON

(c)

R/P

HEAD

()

FIGURE

1

TAPE

GUIDE

90°

CHIP

FIGURE

2

FIGURE

3

ALIGNMENT

PROCEDURES

2.

ERASE

HEAD

TENSION

ADJUSTMENT

Adjust

location

(1,

2

or

3)

hooked

by

coil

spring

so

that

the

tension

by

erase

head

may

be

30g

+

5g

when

keeping

apart

erase

head

from

special

boss.

(Figure

4

and

5).

SPECIAL

FIGURE

4

FIGURE

5

3.

PINCH

ROLLER

TENSION

ADJUSTMENT

Bend

the

adjustment

point

hooked

by

coil

spring

in

the

arrow

directions

so

that

the

tension

by

pinch

roller

may

be

400g

+

40g

when

keeping

apart

pinch

roller

from

capstan

(about

0.5mm)

and

returning

it

to

rotate.

(Figure

6).

:

ADJUSTMENT

POINT

FIGURE

6

ALIGNMENT

POINTS

FIG

A—

PLAY

FREQUENCY

CHARACTERISTIC

+4dB

+3dB

31.5Hz

14Hz

+3dB

+2dB

+

-

3

7

+208

+1dB

OdB

0dB

—1dB

—2dB

+

-

+~2dB

—3dB

~3dB

—4dB

FIG

B

—PLAY/REC

FREQUENCY

CHARACTERISTIC

+44B+

20Hz 40Hz

W7KH2

+-44dB

20Hz

40Hz

15kHz 17kHz

15kHz

17kHz

ALIGNMENT

POINTS

VR604

VR20

VR502

VR503

VR603

|

VRG02

VR215

T2

VR213

VR22

VR212

VR23

V

R4———

je

Or

ee

Se

T201

VR3

T1

VR214

VR15

VR5

VR13

VR210

VR12

VR6

L4

VR10

L6

VR216

L5

V

R211.

aaa

L204

L3

|

VR207

|

VR209

|VR218

VR9I-

L202

L2

L1

VR11

VR18

=40.—

oma

wren

SCHEMATIC

NOTES

AND

DIAGRAMS

—

Values

are

in

ohms.

k

=

1000

M=

1000

k

.

EQ

switch

is

in

low

noise

position.

oon

oor

WN

VOLTAGE

CHART

AC

120V

Volume

Control

at

Minimum

.

BIAS

switch

is

in

low

noise

position.

.

RECORD

MUTE

switch

is

in

off

position.

.

TAPE

MON

switch

is

in

source

position.

.

SUBSONIC

FILTER

switch

is

in

off

position.

No

Signal

Chassis

Ground

IC

ELEMENTS

VOLTAGE

CHART

IC1

NO.

OOAnN

OAP

WN

IC2,

202

PLAY

REC

NO.

OV

1

OV OV

2

OV

3

OV

4

5.0V

OV

5

OV

5.OV

6

OV

7

OV

8

OV

9

OV

10

OV OV

11

OV

5.0V

12

4.9V

OV

13

8.8V

14

15

16

17

18

iC901

PLAY

REC

PINNO.

PLAY

7.2V

1

14V

7.3V

7.2V

2

—

7.2V 7.2V

3

_

14.3V

14.2V

4

OV

0.5V

a)

OV

6

14V

13.0V

7

14V

13.0V

OV

0.5V

OV

7.1V

7.0V

7.1V

7.0V

PLAY

0.4V

6.4V

0.2V

6.0V

6.4V

6.1V

2.4V

6.5V

2.4V

6.0V

6.4V

6.1V

0.2V

6.5V

12,.7V

OV

ce

fy

(pee

.

All

resistors

are

1/4

watt,

+

5%,

unless

otherwise

noted.

REC

0.4V

6.4V

0.2V

6.0V

6.4V

6.0V

2.4V

6.5V

6.4V

2.4V

6.0V

6.4V

6.0V

0.2V

6.4V

6.5V

12.7V

OV

STOP

.

All

capacitor

values

are

in

MF

unless

otherwise

noted.

pF

=

MMF

.

DOLBY

NR

switch

is

in

off

position.

.

TEST

TONE

switch

is

in

off

position.

IC3

NO.

oOONnN

Oohwnr

-

PLAY

OV

15.2V

6.7V

15.2V

SCHEMATIC

NOTES

AND

DIAGRAMS

TRANSISTOR

ELEMENTS

VOLTAGE

CHART

Q1,

201

014,

214

Q15,

215

Q16,

216

Q17

Q18

Q19

Q20

021

Q501,

601

O502,

602

Q503,

603

0801

O802

Q901

Q902

BASE

PLAY

REC

0.5V

2.0V

0.6V

5.0V

1.7V

0.9V

0.6V

1.2V

1.1V

1.4V

1.1V

2.5V

0.6V

5.1V

13.9V

13.8V

2.5V

2.0V

OV

0.7V

OV

0.3V

OV

10.3V

OV

2.4V

OV

2.4V

3.7V

3.6V

13.1V—-13.0V

0.1V

OV

14.1V

15.5V

=

15.4V

BASE

PLAY

STOP

OV

COLLECTOR

PLAY

REC

2.0V

7.2V

5.0V

124V—-:12.3V

124V

12.3

1.9V

1.2V

7.0V

7.9V

5.9V

3.6V

5.1V

15.0V

=:

14.9V

9.8V

14.5V

14.4V

OV

0.006V

OV

10.3V

OV

11.8V

OV

5.9V

OV

5.9V

13.1V—-13.0V

6.7V

13.8V

-13.7V

14.9V

20.3V

=

19.8V

COLLECTOR

PLAY

STOP

14V

OV

14V

--

142

—

EMITTER

PLAY

REC

OV

1.3V

OV

4.3V

1.1V

0.2V

0.004V

0.6V

2.0V

OV

4.4V

145V

—-14.4V

1.9V

1.4V

OV

9.8V

OV

1.7V

~

OV

1.7V

3.3V

13.8V

13.7

0.03V

OV

13.3V

14.9V

=

14.9V

EMITTER

PLAY

STOP

OV

lam

ee

3

SCHEMATIC

DIAGRAM

LCH

MIC

fica

720

aay

ic2

1/2

-

A73

HA11221

270k

LCH

RE

Ly

ote

LCH

C4

aa

LINE

IN

HOs16V

55

LOW

(©

Ae

HIGH

(©

r

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