Harman Kardon HK3500 Manual de usuario

The

Harman

Kardon

Model

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

NOTE:

All

adjustments

should

made

under

the

following

conditions

unless

otherwise

noted.

Power

Supply

Voltage

AC120V

for

units

(220V

for

units).

Doiby

Switch

OFF

position.

Test

Tone

Switch

OFF

position.

Selector

Switch

LOW

NOISE

position.

Bias

Selector

Switch

LOW

NOISE

position.

Record

Mute

Switch

OFF

position.

Tape

Mon

Switch

TAPE

position.

Subsonic

Filter

Switch

OFF

position.

Power

Switch

position.

Bias

Trim

NORMAL

position.

Microphone

Level

Output

Level

10.

Signal

Source

connected

INPUT

LOW.

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

DOLBY

5kHz

200mV

V.T.

V.M.

SMT

Vcore

Line

Level

and

SMT

Vcore

V.T.

V.M.

TP2

and

Gnd.

CONOARWN

—

WNAO

Adj.

for

23.5mV

V.T.

V.M.

V.T.

V.M.

neg.

VR11

Adjust

that

output

Dolby

side

C47

and

Gnd.

+8dB

than

output

Dolby

off.

V.7T.

V.M.

neg.

side

C247

and

Gnd.

V.T.V.M.

TP7

and

Gnd.

VR211

—

5kHz

TP5

and

Gnd.

Play

——-

Adjust

input

for

59mV

VR10

(L)

Adj.

output

that

output

Dolby

—8dB

than

output

Dolby

off.

Adj.

input

for

59mV

V.T.

V.M.

VR210

(R)

Adj.

output

that

output

Dolby

—8dB

than

output

Dolby

off.

5kHz

TP6

and

Gnd.

AUTO

SHUTOFF

V.T.V.M.

and

TP8&

Frequency

Counter

TM905

(On

Auto

Shutoff

Bd.)

and

Gnd.

Frequency

reading

counter

should

between

154Hz

232Hz.

(If

not

within

spec.

change

C907

higher

lower

value]

Confirm

stopping

within

2.5

sec.

after

the

tape

stops.

ALIGNMENT

PROCEDURES

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

MPX

FILTER]

1kHz

200mV

Line

19kHz

(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

Adj.

output

for

775mV

V.T.

V.M.

LEVEL

Doiby

Test

Tape

and

Gnd.

Vion.

rear

panel)

(MTT-150)

and

Gnd.

rear

panel)

V.T.V.M.,

(L)

Confirm

that

output

1.5V

£1.5dB.

ae!

400Hz

V.T.V.M.

TP9

Play/Tape

Adj.

for

1.2V

V.T.

V.M.

Dolby

Test

Tape

and

Gnd.

Mon.

VR502

(L)

(MTT-150)

V.T.V.M.

TP10

VR602

(R)

and

Gnd.

VR504

(L)

Adj.

for

meter.

boo

vR604

(Fi)

Source

1kHz

200mV

Adj.

for

meter.

200mv —20dB

VR504

(L)

Adj.

for

—20

meter.

1kHz

200mV

VR502

(L)

Adj.

for

meter.

(Repeat

steps

and

obtain

correct

meter

readings).

1kHz

200mV

Adj.

for

meter.

200mV

—20dB

VR604

(R)

Adj.

for

—20

meter.

1kHz

200mV

VR602

(R)

Adj.

for

meter.

(Repeat

steps

and

obtain

correct

meter

readings).

V.T.V.M.

and

Source

Play

Line

Level

Adj.

for

meters.

Frequency

Counter

Line

Out

Dolby

Filter

(L)

L202

(R)

Line

Level

Adj.

for

meters.

Confirm

that

16kHz

output

than

—1dB

1kHz

output.

Confirm

that

19kHz

output

less

than

—30dB

the

1kHz

output.

Adj.

for

minimum

output.

ALIGNMENT

PROCEDURES

SIGNAL

MEASUREMENT

;

iTEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

TEST

TONE

Source

VR3

(L)

Adj.

for

meter.

Test

Tone

Sw.

400Hz

VRb5

(R)

VR4

(L)

VR6

(R)

Source

Test

Tone

Sw.

8kHz

PEAK

1kHz

200mV

Source

Line

Level

Adj.

for

meters.

INDICATOR

1kHz

200mV

+2dB

Adj.

for

—20

meter.

VR503

(L)

that

peak

LED

input

level

+2.5dB

and

off

+1.5dB.

VR603

(R)

PLAYBACK

MTT216,

V.T.V.M.

Play

Tape

VR7

(L)

High

Adj.

meet

specifications.

(Fig.

FREQUENCY}

MTT116U

Line

Outputs

Mon.

VRQ

(L)

Middle

CHARAC-

MTT217C

Bias

;

TERISTIC

EO-LN

VR207

(L)

High

VR209

(R)

Middle

PLAYBACK

V.T.V.M.

PlayTape

Confirm

that

the

curve

meets

FREQUENCY

Line

Outputs

Mon.

specification.

(Fig.

A).

CHARAC-

Bias

Cr02

TERISTIC

Cr02

MTT116K

(CrO2)

Set

variable

resistors

(VR19,

20,

22,

23)

for

bias

adj.

center,

BIAS

Frequency

counter

Adj.

for

105kHz

Frequency

Counter.

FREQUENCY

PT13

and

Gnd.

AND

TRAP

Confirm

105kHz

=3kHz

when

switch

any

position.

Adj.

for

minimum

output.

V.T.

V.M.

Line

Rec/Play

Output

Tape

Mon.

L203

(R)

ALIGNMENT

PROCEDURES

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

ADJUST

INSTRUCTIONS

ree

V.T.V.M.

TP13

(L)

and

Gnd.

V.T.V.M.

TP15

204

(R)

and

Gnd.

V.T.

V.M.to

TP11

(L)

and

Gnd.

V.T.V.M.

TP12

L205

(R)

and

Gnd.

BIAS

TRAP

(REC.)

Adj.

for

maximum

output.

Adj.

for

minimum

output.

BIAS

LEVEL

Adj.

for

10mV

V.T.

V.M.

V.T.V.M.

TP13

VR22

(L)

and

Gnd.

VR23

(R)

V.T.

V.M.

TP15

and

Gnd.

Test

Tone

V.T.V.M.

Line

Rec/Play

VR17

(L)

Adj.

for

same

level

both

source

and

400Hz

(Maxell

Output

Bias

{on

front

tape

mon,

positions.

UDXLI)

EQ-LN

panel)

Test

Tone

Sw.

400Hz

VR217

(R)

(on

front

panel)

V.T.V.

Line

Rec/Play

Adj.

for

—20

meters.

Output

Tape

Mon.

Bias

Trim

Note

the

line

output

level

when

obtaining

maximum

output.

(Return

bias

trim

pot.

center

detent).

VR23

(L)

VR22

(R)

Increase

bias

level

that

the

fine

level

output

drops

2.5dB

below

the

maximum

line

output

level

from

step

V.T.V.M.

TP13

Rec.

VR19

Adj.

bias

level

for

+2dB

than

the

bias

and

Gnd.

Bias-FeCr

level

Low

noise

position.

6.3kHz

200mV

VR20

Adj.

bias

level

for

+4dB

than

the

bias

Cr02

—

low

noise

position.

BIAS

FREQUENCY

AND

TRAP

V.T.V.M.

TP13

Rec.

Bias

Trim

and

Gnd,

V.T.V.M.

TP15

and

Gnd.

Cr02

Confirm

bias

frequency

and

bias

trap

adjustment.

BIAS

TRIM

Confirm

that

bias

level

changes

from

—30%

(max.

—45%)

+30%

(max.

+45%

ALIGNMENT

PROCEDURES

ADJUST

INSTRUCTIONS

SIGNAL

MEASUREMENT

ITEM

SOURCE

CONNECTION

REC

LEVEL

1kHz

200mV

V.T.V.M.

Line

Level

Adj.

for

meters.

(LN)

Out.

Rec/Play

VR17

(L)

(on

Adj.

for

meters.

Mon.

front

panel)

VR217

(R)

(on

front

panel)

Adj.

for

meters.

(FeCr)

VR14

(L)

VR214

(R)

(Cr02)

VR16

(L)

WAVE

1kHz

20mV

Rec/Play

VR18

(L)

(square

wave)

VR218

(R)

Adj.

for

meters.

Oscilloscope

Line

Output

Adj.

for

obtaining

minimum

tilt

and

maximum

rise

time.

LIN

Acceptable

Unacceptable

REC/PLAY

1kHz

200mV

V.T.

V.M.

Line

Adj.

for

meters.

all

FREQUENCY

Line

Out

CHARAC-

(Low)

TERISTIC

(LN)

20Hz

kHz

Rec/Play

VR12

(L)

Adj.

meet

specifications

(Fig.

200mV

30dB

Mion.

EO-LN

VR212

(R)

Bias

Rec/Play

Mon.

FeCr

Bias

FeCr

VR13

{L)

VR213

(R)

Same

above

(Fig.

Rec/Play

Mon

Cr02

(Cr02)

Bias-Cr02

SQUARE

WAVE

VR15

(L)

VR215

(R)

Same

above

(Fig.

4).

Confirm

square

wave

test.

When

adjusting

again,

confirm

Rec/Play

frequency

characteristic.

ALIGNMENT

PROCEDURES

MECHANICAL

ADJUSTMENTS

REC/PLAY

READ

ADJUSTMENT

(1)

Adjust

screw

(A)

that

the

chip

the

head

gauge

(M-300)

does

not

touch

the

tape

guide

shown

figure

(2)

Make

the

mechanical

assembly

stand

and

adjust

screw

(B)

shown

figure

NOTE:

Never

fail

confirm

the

above

adjustment

(1)

when

adjusting

screw

(B).

(3)

Connect

VTVM

line

output

jacks

and

play

back

kHz

test

tape

(TEAC

MTT114).

Adjust

screw

(C)

that

the

output

the

VTVM

will

maximum

and

have

little

level

change

(less

than

dB)

both

channels.

NOTE:

Never

fail

confirm

the

above

adjustments

(1)

(2)

when

adjusting

screw

(C).

(4)

Repeat

steps

through

until

being

able

confirm

above

all

adjustment

without

adjustment.

LON

(c)

R/P

HEAD

()

FIGURE

TAPE

GUIDE

90°

CHIP

FIGURE

ALIGNMENT

PROCEDURES

ERASE

HEAD

TENSION

ADJUSTMENT

Adjust

location

(1,

hooked

coil

spring

that

the

tension

erase

head

may

30g

when

keeping

apart

erase

head

from

special

boss.

(Figure

and

5).

SPECIAL

FIGURE

PINCH

ROLLER

TENSION

ADJUSTMENT

Bend

the

adjustment

point

hooked

coil

spring

the

arrow

directions

that

the

tension

pinch

roller

may

400g

40g

when

keeping

apart

pinch

roller

from

capstan

(about

0.5mm)

and

returning

rotate.

(Figure

6).

ADJUSTMENT

POINT

FIGURE

ALIGNMENT

POINTS

FIG

A—

PLAY

FREQUENCY

CHARACTERISTIC

+4dB

+3dB

31.5Hz

14Hz

+3dB

+2dB

+208

+1dB

OdB

0dB

—1dB

—2dB

+~2dB

—3dB

~3dB

—4dB

FIG

—PLAY/REC

FREQUENCY

CHARACTERISTIC

+44B+

20Hz 40Hz

W7KH2

+-44dB

20Hz

40Hz

15kHz 17kHz

15kHz

17kHz

ALIGNMENT

POINTS

VR604

VR20

VR502

VR503

VR603

VRG02

VR215

VR213

VR22

VR212

VR23

R4———

T201

VR3

VR214

VR15

VR5

VR13

VR210

VR12

VR6

VR10

VR216

R211.

aaa

L204

VR207

VR209

|VR218

VR9I-

L202

VR11

VR18

=40.—

oma

wren

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