JVC KS-T807 Bedienungsanleitung

SERVICE MANUAL

2004/2

CASSETTE RECEIVER

MA06920042

KS-T807,KS-T707

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

CHANGING the STANDARD PLATE

KS-T807EE KS-T707EE

Area suffix

EE --------- Russian Federation

KS-T707

KS-T807

1-2 (No.MA069)

SPECIFICATION

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 45 W per channel

Rear 45 W per channel

Continuous Power Output (RMS) Front 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Rear 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Load Impedance 4 Ω(4 Ωto 8 Ωallowance)

Tone Control Range Bass ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 2.0 V/20 kΩload (250 nWb/m)

TUNER SECTION

Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz

FM3 65.00 MHz to 74.00 MHz

AM (MW) 522 kHz to 1 620 kHz

(LW) 144 kHz to 279 kHz

[FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

Capture Ratio 1.5 dB

[MW Tuner] Sensitivity 20 µV

Selectivity 35 dB

[LW Tuner] Sensitivity 50 µV

CASSETTE DECK SECTION

Wow & Flutter 0.11% (WRMS)

Fast-Wind Time 100 sec. (C-60)

Frequency Response 30 Hz to 16 000 Hz (Normal tape)

Signal-to-Noise Ratio 56 dB

Stereo Separation 40 dB

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0ºC to +40ºC

Dimensions (W ×H ×D) Installation Size (approx.) 182 mm ×52 mm ×150 mm

Panel Size (approx.) 188 mm ×58 mm ×12 mm

Mass (approx.) 1.5 kg (excluding accessories)

(No.MA069)1-3

SECTION 1

PRECAUTION

1.1 Safety Precautions

!Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

1-4 (No.MA069)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA069)1-5

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front panel assembly

(See Fig.1)

(1) Push the detach button in the lower right part of the front

panel assembly and remove the front panel assembly.

Fig.1

3.1.2 Removing the bottom cover

(See Fig.2)

(1) Turn the main body up side down.

(2) Insert a screwdriver under the joints to release the two

joints aon the left side, two joints bon the right side and

joint con the back side of the main body, then remove the

bottom cover from the main body.

Note:

When releasing the joints using a screwdriver, do not damage

the main board.

Fig.2

3.1.3 Removing the front chassis assembly

(See Fig.3 and 4)

• Prior to performing the following procedures, remove the front

panel assembly and bottom cover.

(1) Remove the two screws Aon the both sides of the main

body. (See fig.3.)

(2) Remove the two screws Bon the front side of the main

body. (See fig.4)

(3) Release the two joints dand two joints eon the both sides

of the main body, then remove the front chassis assembly

toward the front. (See fig.3.)

Fig.3

Fig.4

Front panel assembly

Detach button

Bottom cover

Joint a

Joint b

Joint a

Joint b

Joint c

Joint d

Joint d Front chassis assembly

Joint e

Front chassis assembly

1-6 (No.MA069)

3.1.4 Removing the side panel

(See Fig.5)

• Prior to performing the following procedure, remove the front

panel assembly as required.

(1) Remove the two screws Cand screw Dattaching the side

panel on the left side of the main body, and remove the side

panel.

Fig.5

3.1.5 Removing the rear bracket

(See Fig.6)

• Prior to performing the following procedure, remove the bottom

cover.

(1) Remove the two screws E, screw Fand three screws Gat-

taching the rear bracket on the back side of the main body.

(2) Remove the rear bracket.

3.1.6 Removing the main board

(See Figs.6 and 7)

• Prior to performing the following procedures, remove the front

panel assembly, bottom cover and side panel.

• Remove the front chassis assembly as required.

(1) Remove the two screws Eattaching the rear bracket on the

back side of the main body. (See Fig.6.)

(2) Remove the two screws Hattaching the main board. (See

Fig.7.)

(3) Disconnect the connector CP401 on the main board from

the main body and take out the main board with the rear

bracket. (See Fig.7.)

Reference:

Remove the rear bracket from the main body as required. (See

“3.1.5 Removing the rear bracket”.)

Fig.6

Fig.7

Side panel

CCD

Rear bracket

Main board

CP401

(No.MA069)1-7

3.1.7 Removing the cassette mechanism assembly

(See Fig. 8)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, side panel, rear bracket and

main board.

• Remove the front chassis assembly as required.

(1) Remove the four screws Jattaching the cassette mecha-

nism assembly on the top chassis.

(2) Take out the cassette mechanism assembly.

Fig.8

3.1.8 Removing the mecha control board

(See Fig.9)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, side panel, rear bracket, main

board and cassette mechanism assembly.

(1) Disconnect the wire from the connector CN402 on the

mecha control board.

(2) Disconnect the card wire from the connector CN403 on the

mecha control board.

(3) Remove the screw Kattaching the mecha control board.

(4) Bend the hook f in direction of the arrow 1 and move the

mecha control board in the direction of the arrow 2.

(5) Remove the mecha control board from the mecha bracket

(L) of the top chassis. Fig.9

J J

Top chassis

Cassette mechanism assembly

CN402

CN401 CN403

Mecha control board

Hook f

Mecha bracket (L)

1-8 (No.MA069)

3.1.9 Removing the front board

(See Figs.10 to 12)

• Prior to performing the following procedures, remove the front

panel assembly.

(1) Remove the four screws Lon the back side of the front

panel assembly. (See Fig.10.)

(2) Release the ten joints gand remove the rear cover. (See

Fig.11.)

(3) Take out the front board from the front panel assembly.

(See Fig.12.)

Caution:

Take care not to lose the springs.

Fig.10

Fig.11

Fig.12

Rear cover

Joints g

Joints g Joints g

Front board

Spring

Front panel assembly

(No.MA069)1-9

3.2 Cassette mechanism assembly

REFERENCE:

Prior to performing the following procedures, turn the mode

gear on the bottom of the body until the respective part comes

to the EJECT position (Refer to Fig.1).

Fig.1

3.2.1 Removing the cassette guide

(See Fig.2)

(1) Turn the mode gear to set to RVS play or subsequent

mode.

(2) Remove the cassette guide from the main chassis while re-

leasing each two joint tabs ain the direction of the arrow.

Fig.2

3.2.2 Removing the load arm

(See Fig.3)

(1) Remove the E-washer attaching the load arm.

(2) Move the load arm in the direction of the arrow and release

the joint bon the cassette catch.

Fig.3

Mode gea

Cassette guide

Tab a

Load arm

E-washer

Joint b

1-10 (No.MA069)

3.2.3 Removing the cassette hanger assembly / cassette holder

(See Fig.4 to 7)

(1) Check the mode is set to EJECT. Push down the front part

of the cassette holder and move in the direction of the ar-

row to release the joint c.

(2) Move the rear part of the cassette hanger assembly in the

direction of the arrow to release it from the two joint bosses

(3) Release the holder stabilizer spring from the hooks eand

f, then pull out from the cassette hanger assembly.

(4) Bring up the rear side of the cassette hanger assembly to

release the joint gand h.

(5) Pull out the cassette catch from the cassette hanger as-

sembly.

Fig.4

Fig.5

Fig.6

Fig.7

Cassette holder assembly

Side bracket

Joints c

Cassette holder assembly

Cassette hanger

assembly

Boss d

Cassette hange

assembly

Cassette stabilizer spring

Hook f

Hook e

Cassette hanger

assembly

Hook h

Hook g

Cassette holder

assembly

Cassette holder assembly

Cassette hanger assembly

Cassette catch

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