TEAC GF-600 Service manual

SERVICE MANUAL

GF-600

Compact Hi-Fi Stereo System

NOTES CONTENTS

● PC boards shown are viewed from parts side.

● Parts marked with * require longer delivery time.

● The parts with no reference number or no parts number in the

exploded views are not supplied.

1 SAFETY INFORAMTION…………………………

2 SPECIFICATIONS…………………………………

3 ADJUSTMENT AND CHECKS…………………..

3-1 AMPLIFIER SECTION……....…………………. 4

2

3

4

● As regards the resistors and capacitors, refer to the circuit

diagrams contained in this manual.

●

components. They must be replaced with identical

components – refer to the appropriate parts list and

ensure exact replacement.

● Parts of [] mark can be used only with the version designated.

● [US]:U.S.A.[C]:CANADA[SA]:SOUTH AMERICA

Parts marked with this sign are safety critical

3-2 TUNER SECTION…………………….………… 5

3-3 CD PLAYER SECTION……………...…………. 7

3-4 CASSETTE DECK SECTION…………………. 8

3-5 TURNTABLE SECTION……………………..…. 10

4 EXPLODED VIEWS AND PARTS LIST…………

5 PC BOARDS AND PARTS LIST…………………

6 WIRING DIAGRAM………………………………..

11

21

28

GF-600

1 SAFETY INFORMATION

SAFETY INFORMATION

This product has been designed and manufactured according to FDA regulations “title 21, CFR, chapter 1, subchapter J based

on the Radiation Control for Health and Safety Act of 1986” and is classified as class 1 laser product. There is no hazardous

invisible laser radiation during operation because invisible laser radiation emitted inside of this product is completely confined in

the protective housings. The label required in this regulation is shown below.

● CAUTION

USE OF CONTROLS OR ADJUSTMENT OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HERE

IN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Optical pickup:

Type : SLD104u

Manufacturer : SONY Corporation

Laser output : Less than 0.5mV on the objective lens

Wavelength 760 – 800 nm

2

GF-600

2 SPECIFICATIONS

AMPLIFIER Section

Output Power…………………...………………….……..15W+15W

Input Sensitivity………………..…………….………….…….220mV

Frequency Response………………………...….…50 to 20,000 Hz

TUNER Section (FM)

Frequency Range………………………..…...87.50 to 108.00 MHz

Sensitivity (S/N30dB)………..……………….………...……20dBµV

TUNER Section (AM)

Frequency Range…………………………….……530 to 1710 kHz

Sensitivity (S/N20dB)………..………………..…….....…60dBµV/m

CD PLAYER Section

SPEAKER SYSTEM Section

Type.…………………………….……………….2-way bass reflex

Impedance…………….……………………….……….…..6 ohms

GENERAL

Power Requirements…..…120V, 60Hz (U.S.A./Canada model)

Power Consumption………...……………..……..……..……50W

Dimension ( W x H x D )

Main Unit…………………….……..…….395 x 379 x 277 mm

(15-9/16” x 14-15/16” x 14-13/16”)

Speaker….…20 x 172 x 377 mm (7-7/8” x 6-3/4 x 14-13/16”)

Weight

Main Unit………………..…………………...11.6 kg (25-1/2 lb)

Speaker………………..…………..….…2.8 kg (6-3/16 lb ) x 2

120V/230V AC, 50-60Hz (General export model)

Frequency Response…………………...…20 to 20,000Hz (±1dB)

Signal-to-Noise Ratio……….………….……………….…….. 55dB

Wow and Flutter……………………………...……...Unmeasurable

CASSETTE DECK Section

Track System……………..……………..4 track, 2 channel Stereo

Tape Speed…………………….….……..…..…………..4.8cm/sec

Wow and Flutter……………….…………….….….0.35% (WRMS)

Frequency Response……………..…………....….100 to 8,000 Hz

Signal-to-Noise Ratio………..………………………….……...35dB

RECORD PLAYER Section

Motor…………………………………………..….…DC servo motor

Drive System………………………………..…….….……Belt Drive

Speed….………..………………..……33-1/3 rpm, 45 rpm, 78 rpm

Standard Accessories

Remote Control Unit (RC-905) x 1

45 RPM adaptor x 1

Owner’s Manual x 1

Warranty Card x 1

● Design and specifications are subject to change without

notice.

● Illustrations may differ slightly from production models

Wow and Flutter….……………………....less than 2.5% (WRMS)

S/N ratio…………….……………….............…......More than 50dB

Cartridge type…………………….…..…Ceramic Stereo Cartridge

3

GF-600

r

3 ADJUSTMENT AND CHECKS

● 0 dB is referenced to 1.0V.

● Load impedance:

SPEAKERS: 6 ohm (40W or more)

PHONES: 1k ohm (1/4W)

● Specified input level: -3dB (AUX)

● VOLUME position: VOL 20

● Unless specified otherwise,measurements are made in PHONES jack

Oscillator

AUX IN

L

R

Fig.3-1 Basic test setup

3.1 AMPLIFIER SECTION

GF-600

PHONES

SPEAKERS

6 ohm

1k ohm

Oscilloscope

Distorion Analyze

S1

AC voltmeter

ITEM

1.AUX input sensitivity 1KHz /-3dB -4 +/-3dB Reference output level

2.Harmonic distortion 1KHz /-3dB 1.0% or less

3.Frequency response 40Hz,100Hz,20kHz

4.S/N ratio No signal

5.Maximum output power 1KHz THD:10% or less VOLUME: MAX

INPUT SIGNAL

(AUX IN)

SPECIFICATIONS REMARKS

40Hz: 9 +/-3dB

100Hz: 7 +/-3dB

20kHz: 3 +/-3dB

50dB or better

Reference level:1kHz

Ratio of reference output

level to noise

4

3-2 TUNER SECTION

GF-600

SPEAKER

JK2

SW1

IC6

JK1

AUX INPUT

GF-600 MAIN PCB

IC5

IC7

IC

IC2

L4

L

T

2

L2

C304

L1

IC1

A M

A N T

C303

Q31

IC3

VR1

L3

T

4

L8

3-2-1 AM TUNER

ITEM

1.Voltage

adjustment

2.IFT

adjustment

3.Tracking

adjustment

5

SIGNAL GENERATOR SETTING

Audio Modulation Frequency Output

1kHz 30% 600kHz 76 dBuV 600kHz L4

1kHz 30% 600kHz 76 dBuV 600kHz Ant coil

1kHz 30%

FIG 3-2 Adjustment locations

GF-600 ADJUSTMENTS

1710kHz L5 VT 8.0V

530kHz Check VT 0.9V

1400kHz 76 dBuV 1400kHz

TC2 Repeat

step 3

MEASURING

POINTS,RESULT

Maximum output level

GF-600

r

AM signal generator

3-2-2 FM TUNER

60cm

AM

AM Loop

Antenna

GF-600

PHON

Fig.3-3

1k ohm

AC voltmete

S1

ITEM

1.Voltage

adjustment

2.IFT

adjustment

3.Tracking

adjustment

FM signal generator

6

SIGNAL GENERATOR SETTING

Audio Modulation Frequency Output

1kHz 22.5kHz 90.1MHz 22.5 dBuV 90.1MHz L1

1kHz 22.5kHz 90.1MHz 76 dBuV 90.1MHz L3

1kHz 22.5kHz 106.0MHz 76 dBuV 106.0MHz

GF-600 ADJUSTMENTS

108.0MHz L2 VT 8.0V

87.5MHz Check VT 2.4V

GF-600

FM

75 ohm

Fig.3-4

PHONES

TC4 Repeat

step 3

1k ohm

MEASURING

POINTS,RESULT

Maximum output level

AC voltmete

S1

GF-600

J

3-3 CD PLAYER SECTION

3-3-1 ADJUSTMENT

● Set all of the adjustment volumes to the center position.

● Use an oscilloscope that has a bandwidth greater than 40MHz.

● Use MCD-111 test disc.

A. EF balance adjustment

1. Connect the probe to P1 or J126(TE) and the probe ground to P2 or J154(VC).

2. In the search mode,and adjust VR101 so that the upper and lower.

amplitudes of the waveform become equal above and below 0V.

B. RF level adjustment

1. Connect the probe to P3 or J143(RF) and the probe ground to P2 or J154(VC).

2. In the play mode,and adjust VR102 so that the waveform on the oscilloscope

becomes maximum.

IC10

VR101

IC10

P3

126

P1

IC10

7

A

0V A=B

B

Maximum

IC105

VR102

143

154

IC10

P2

GF-600

3-3-2 Audio performance

ITEM

TRACK No. FREQUENOY/LEVEL

DISC

SPECIFICATIONS REMARKS

1.Output level 2 1KHz/0dB 6 ±3dB

2.Harmonic

distortion

3.Frequency

response

4.S/N ratio 7 -∞dB 50dB or better

2 1KHz/0dB 0.5% or less

4,6 100Hz,20KHz/0dB +1, -3dB

Reference level:

1KHz

3-4 CASSETTE DECK SECTION

Before performing adjustments and checks clean and demagnetize the entire tape path.

3-4-1 Mechanical performance

GF-600

ITEM TEST TAPE SPECIFICATIONS

8

1.Wow and flutter

(playback

method)

2.Tape speed

deviation

3.Tape speed

drifting

MTT- 111N

MTT-111N Within ±90Hz

0.35% or less

(JIS WTD)

3000 ±120Hz

(Adjustment

points: VR1)

PHONE

Frequency counter

Wow & Flutter Meter

L

R

Fig.3-6

GF-600

3-4-2 PLAYBACK PERFORMANCE

ITEM TEST TAPE

1.Head azimuth

adjustment

2.Playback output level

3.Playback frequency response

4.Playback S/N ratio

MTT-25702 8KHz Azimuth screw

MTT-25702 250Hz Check

MTT-150C

MTT-25702

MTT-5513

PLAYBACK

FREQUENCY

Dolby B type

tone

8KHz

Playback the

leader tape

portion

Oscilloscope

GF-600

(in phase)ter

PHONES

VER

HOR

S1

Fig.3-7 Test setup for azimuth check

3-4-3 Recording performance

ADJUSTMENTS

Check -4 ±3dB

Check ±5dB

Check 40dB min

AC voltmeter

MEASURING

POINTS,RESULT

Maximum output level at L/R-ch

Phase:within 45°

(Fig.3-8)

0°

(in phase)

Fig.3-8 Confirming phase relationship

REMARKS

45° 90° 135°

Fig.3-7

Reference output

level

Reference level:250KHz

Ratio of reference

level to noise

180°

(out of phase)

ITEM TEST TAPE

1.Bias osc frequency

2.Total harmonic

distortion

3.Overall frequency response

4.Overall

S/N Ratio

MTT-5513

MTT-5563

MTT-5513

MTT-5563

MTT-5513 NO signal Check 35dB min

INPUT SIGNAL

(AUX in)

400Hz/-6dB

8KHz/-28dB

ADJUSTMENTS

Check

Check 3.0% or less

Check +3 to 4dB

Check ±7dB

MEASURING

POINTS,RESULT

85KHz

REMARKS

Reference level:

250Hz

Ratio of reference level to noise

9