Jvc KS-F345 Service Manual

49783200303

KS-F345

SERVICE MANUAL

CASSETTE RECEIVER

KS-F345

Area Suffix

EE ---- Russian Federation

S.BASS

SEL

ISP

SSM

SCMMO

TABLE OF CONTENTS

1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

3 Adjustment method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

No.49783

2003/03

KS-F345

1.1 Safety Precautions

SECTION 1

Important 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.

1-2 (No.49783)

SECTION 2

Disassembly method

2.1 Main body

2.1.1 Removing the front panel assembly (See Fig.1)

(1) Press the release button and remove the front panel as-

sembly.

2.1.2 Removing the bottom cover (See Fig.2)

• Prior to performing the following procedure, remove the front

panel assembly. (1) Turn the body upside down. (2) Insert a screwdriver under the joints to release the two

joints a on the left side, the two joints b on the right side and the joint c on the back of the body, then remove the bottom cover from the body.

CAUTION:

When releasing the joint c using a screwdriver, do not damage the main board.

KS-F345

Front panel assembly

Release button

Fig.1

Bottom cover

Joint b

Joint a

2.1.3 Removing the front chassis (See Fig.3)

• Prior to performing the following procedure, remove the front

panel assembly and bottom cover. (1) Remove the screw A on each side of the body. (2) Release the two joints d and two joints e on the sides, then

remove the front chassis toward the front.

Joint a

Joint c

Fig.2

Joint d Joint e

Joint d

Front chassis

Fig.3

Joint e

Joint b

(No.49783)1-3

KS-F345

2.1.4 Removing the heat sink (See Fig.4)

• Prior to performing the following procedure, remove the front

panel assembly. (1) Remove the two screws B and two screws C attaching the

heat sink on the left side of the body, and remove the heat sink.

2.1.5 Removing the rear panel (See Fig.5 )

• Prior to performing the following procedure, remove the front

panel assembly and bottom cover. (1) Remove the two screws D, one screw E and three screws

F attaching the rear panel on the back of the body.

CB C

Heat sink

Fig.4

2.1.6 Removing the main board (See Fig.6)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink and rear panel. (1) Remove the two screws G attaching the main board on the

top chassis.

(2) Disconnect the two connectors CN901 and CN721 on the

main board from the cassette mechanism assembly.

CN721

Fig.5

Main board

CN901

Fig.6

1-4 (No.49783)

2.1.7 Removing the cassette mechanism assembly

(See Fig.7)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink, rear panel and main board. (1) Remove the four screws H attaching the cassette mecha-

nism assembly from the top chassis.

KS-F345

Cassette mechanism assembly

2.1.8 Removing the head amplifier board

(See Fig.8)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink, rear panel, main board and cassette mechanism assembly. (1) Disconnect the wire from CJ901 on the head amplifier

board.

(2) Remove the one screw J attaching the head amplifier

board.

(3) Move the head amplifier board in the direction of the arrow

to release the two joints f, the head amplifier board can be removed.

CJ901

joint f

To head relay board

Top chassis

Fig.7

Head amplifier board

joint f

Fig.8

(No.49783)1-5

KS-F345

2.1.9 Removing the relay board (See Fig.9)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink, rear panel, main board and cassette mechanism assembly. (1) Disconnect the wire from CP722 on the relay board. (2) Remove the one screw K attaching the relay board. (3) Move the relay board in the direction of the arrow to release

the joint g, the relay board can be removed.

Relay board

CP722

2.1.10 Removing the mecha bracket (See Fig.10)

• Prior to performing the following procedure, remove the front

panel assembly, bottom cover, front chassis, heat sink, rear panel, main board, cassette mechanism assembly, head amplifier board and relay board. (1) Remove the four screws L attaching the mecha bracket.

joint g

Fig.9

Mecha bracket

Fig.10

1-6 (No.49783)

2.1.11 Removing the switch (LCD & key) board

(See Fig.11~13)

• Prior to performing the following procedure, remove the front

panel assembly. (1) Remove the four screws M attaching the rear cover on the

back of the front panel assembly.

(2) Release the eleven joints h, the front panel and the rear

cover become separate.

(3) Remove the switch board from the rear cover.

M M

Fig.11

Joint h

KS-F345

Joint h

Fig.12

Switch (LCD & Key) board

Fig.13

(No.49783)1-7

KS-F345

2.2 Cassette mechanism assembly

• Prior to performing the following procedures, remove the head

amplifier board, the relay board and the mechanism bracket.

2.2.1 Removing the direction switch board (See Fig.1)

(1) Unsolder the three wires a on the direction switch board. (2) Remove the one screw A attaching the direction switch

board.

2.2.2 Removing the FF / REW lever assembly (See Fig.1)

(1) Remove the screw B attaching the FF / REW lever assem-

bly on the back of the cassette mechanism assembly.

(2) Remove the screw C on the upper side of the FF / REW

lever assembly.

(3) Lift and pull forward the FF / REW lever assembly to disen-

gage the joints b, c, d and e.

2.2.3 Reattaching the FF / REW lever assembly (See Fig.1)

(1) Reattach the FF / REW lever assembly to the joint c on the

back of the chassis.

(2) Reattach the pinch-roller shaft e, the change lever d and

the return link e to the chassis.

FF / REW lever assembly

Joint c

2.2.4 Removing the playback head (See Fig.2)

• Prior to performing the following procedure, remove the direc-

tion switch board and the FF / REW lever assembly. (1) Remove the screw D attaching the playback head. (2) Remove the C washer and pull out the FF roller. (3) Remove the S support plate, the A arm spring (a) and (b),

the playback head.

ATTENTION:

The A arm spring (a) differs from the A arm spring (b).

2.2.5 Removing the pinch-roller (R) and (F) assembly (See Fig.2)

• Prior to performing the following procedure, remove the direc-

tion switch board and the FF / REW lever assembly. (1) Remove the P arm spring (f) in the pinch-roller (F) assem-

bly from the chassis.

(2) Remove the P arm spring (r) in the pinch-roller (R) assem-

bly from the chassis.

(3) Draw out the pinch roller (F) and (R) assembly from the

shaft.

ATTENTION:

The P arm spring (f) differs from the P arm spring (r).

ATTENTION:

The pinch roller (F) assembly differs from the pinch roller (R) assembly.

Joint e

Joint d

Soldering a

Direction switch board

Fig.1

Pinch-roller (R) assembly

Shaft

Remove the P arm spring (r) from the chassis.

Joint b

C washer

A arm spring (b)

FF roller

S support plate

Playback head

Pinch-roller (F) assembly

A arm spring (a)

Shaft

Remove the P arm spring (f) from the chassis.

1-8 (No.49783)

P arm spring (r)

P arm spring (f)

Fig.2

KS-F345

2.2.6 Removing the cassette hanger / cassette holder (See Fig.3)

• Prior to performing the following procedure, remove the FF /

REW lever assembly. (1) From the rear of the unit, bend the two tabs f outwards and

disengage the two joints g in the direction of the arrow.

(2) Push the eject lever and remove the cassette holder from

the playback head. Disengage the two joints h of the cassette hanger / cassette holder and the eject lever in the direction of the arrow.

(3) Lift the cassette hanger / cassette holder and disengage

the joint i of the return link and the eject lever.

2.2.7 Removing the reel disc assembly (See Fig.4)

• Prior to performing the following procedure, remove the FF /

REW lever assembly and the cassette hanger / cassette holder. (1) Remove the C washer and pull out reel disc assembly.

ATTENTION:

Replace with a new C washer when reattaching.

Joint g

Cassette holder

Cassette hanger

Chassis

Tab f

C washer

Return link

Joint i

Eject lever

Joint h

Joint g

Fig.3

2.2.8 Removing the motor assembly (See Fig.5)

(1) Unsolder the two wires j on the motor assembly. (2) Turn over the cassette mechanism assembly and remove

the main belt and the sub-belt from the motor pulley.

ATTENTION:

The main belt can now be removed.

(3) Remove the two screws G attaching the motor assembly.

C washer

Flywheel (BF)

Fig.4

Main-belt

Reel disc assembly

Motor assembly

Sub-belt

Motor pulley

Soldering j

Flywheel (BR)

Reel base assembly

Fig.5

(No.49783)1-9

KS-F345

2.2.9 Removing the Flywheel (BF) and (BR) assembly (See Fig.4 and 5)

• Prior to performing the following procedure, remove the cas-

sette hanger / cassette holder. (1) From the upper side of the cassette mechanism assembly,

remove the C washer from each shaft of the flywheel (BF) and (BR).

(2) Turn over the cassette mechanism assembly and remove

the main belt. Pull out the flywheel (BF) and (BR) downward respectively.

C washer

Reel disc assembly

C washer

Fig.4

Main-belt

Motor assembly

2.2.10 Removing the reel base assembly (See Fig.5 and 6)

(1) Raise the part k of the reel base assembly slightly and re-

move the selector link (B) on the front side of the cassette mechanism assembly by turning it as shown in Fig.6.

(2) Remove the three screws E and the one screw F on the

underside of the cassette mechanism assembly.

ATTENTION:

The reel base assembly is not repairable. Handle with care.

Pinch-roller (R) assembly

Selector link (B).

Turn the selector link (B).

Fig.6

Inside of the reel base assembly

Flywheel (BF)

Flywheel (BR)

Sub-belt

Reel base assembly

Fig.5

Motor pulley

Soldering j

Fig.7

1-10 (No.49783)

KS-F345

2.2.11 Removing the mute switch board (See Fig.8)

(1) Unsolder the two wires l on the mute switch board on the

back of the cassette mechanism assembly.

(2) Remove the screw H attaching the mute switch board.

2.2.12 Removing the power switch (See Fig.9)

• Prior to performing the following procedure, remove the motor

assembly. (1) Unsolder the two wires m on the power switch on the side

of the cassette mechanism assembly.

(2) Remove the screw I attaching the power switch.

Cassette mechanism assembly

Soldering l

Fig.8

Soldering m

Cassette mechanism assembly

Power switch

Fig.9

Rower switch

Motor assembly

Mute switch board

(No.49783)1-11

KS-F345

3.1 Adjustment method

Test instruments reqired for adjustment Standard volume position

1. Digital oscilloscoe(100MHz)

2. Frequency counter meter

3. Electric voltmeter

4. Wow & flutter meter

5. Test tapes

VT724.......................for DOLBY level measurement

VT739............For playback frequency measurement

VT712....For wow flutter & tape speed measurement

VT703.....................For head azimuth measurement

6. Torque gauge...................Cassette type for CTG-N

(Mechanism adjustment)

SECTION 3

Adjustment

Balance and Bass, Treble volume, Fader

: Center(Indication"0")

Loudness, Dolby NR, Sound, Cruise : Off

Volume position is about 2V at speaker output with

following conditions, Playback the test tape VT721.

AM mode 999kHz/62dB, INT/400Hz, 30% modulation signal on recieving. FM mono mode 97.9MHz/66dB, INT/400Hz, 22.5kHz deviation pilot off mono FM stereo mode 1kHz, 67.5kHz dev.pilot 7.5kHz dev Output level 0dB (1 V,50 /open terminal)

Measuring conditions(Amplifier section)

Power supply voltage.............. DC14.4V(11V to 16V allowance)

Load impedance............ 4 (4 to 8 allowance)

Line out level/Impedance..............1.0V/20k load (250 nWb/m)

Frequency band

87.5 MHz to 108.0 MHz

65.0 MHz to 74.0 MHz

522 kHz to 1620 kHz

144 kHz to 279 kHz

Band

FM1/FM2

FM3

1-12 (No.49783)

Information for using a car audio service jig

1. For 1995 and 1996, we're advancing efforts to make our extension cords common for all car audio products.

Please use this type of extension cord as follows.

2. As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the

mechanism assembly after disassembly.

3. Extension cord : EXTKSRT002-6P ( 6 pin extension cord ) For connection between mechanism assembly

and main board.

4. Check for mechanism driving section such as motor ,etc..

Disassembly method

1. Remove the front panel assembly.

2. Remove the bottom cover.

3. Remove the front chassis.

4. Remove the two screws D of the rear panel. (Refer to Disassembly method.)

5. Remove the heat sink.

6. Reattach the heat sink with two screws B. (Refer to Disassembly method.)

7. Install the front chassis and front panel assmbly.

8. Confirm that current is being carried by connecting an extension cord jig.

Note

Available to connect to the CJ701 connector when installing the front panel.

KS-F345

CAUTION :

Be sure to attach a heat sink on the power amplifier IC of a main board when supplying the power.

If voltage is applied without attaching the heat sink, the power amplifier IC will be destroyed by heat.

Cassette mechanism

EXTKSRT002-6P

Extension cord : EXTKSRT002-6P

Main board

Front panel assembly

(No.49783)1-13

KS-F345

Arrangement of adjusting & test points

Cassette mechanism

(Surface)

Motor assembly

Tape speed adjust

Playback head

Azimuth screw

Head section view

Head azimuth screw

Playback head

Height adjusting screw

Fixed screw

Height adjusting screw

1-14 (No.49783)

Height adjusting screw

Mechanism adjustment section

Item Adjusting & Confirmation Methods Adjust Std. Value

1.Head azimuth

"Head Height Adjustment" Note

Adjust the azimuth directly. When you adjust the height using a mirror tape, remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment.

Head shield

KS-F345

A Line

1.Load the mirror tape ( SCC-1659 ). Adjust with height adjustment screw (a) and azimuth adjustment screw (b) so that line "A" of the mirror tape runs in the center between Lch and Rch in the reverse play mode.

2.After switching from REV to FWD then to REV, check that the head position set in procedure "1" is not changed. *If the position has shifted, adjust again and check.

3.Adjust the azimuth screw (b) so that line "B" of the mirror tape runs in the center between Lch and Rch in the forward play mode.

"Head Azimuth Adjustment"

1.Load the test tape ( VT724: 1kHz ) and play it back in the reverse play mode. set the Rch output level to maximum.

2.Load the test tape ( VT703: 10kHz ) and play it back in the forward play mode. Adjust the Rch and Lch output levels to maximum, with azimuth adjustment screw (b).

In this case, the phase difference should be within 45 .

3.Engage the reverse mode and adjust the output level to maximum, with azimuth adjustment screw (c). *The phase diff

erence should be 45 or more.

4.When switching between forward and reverse modes, the difference between channels should be within 3dB. *Between FWD Lch and Rch, REV Lch and Rch.

5.When the test tape ( VT721 : 315Hz ) is played back, the level difference between channels should be within 1.5dB.

The head is at low position during FWD.

B Line

Head shield

The head is at height position during REV.

Head azimuth screw

screw (c)

screw (b)

Phase

Fixed screw

screw (a)

2.Tape Speed and Wow & Flutter

3.Playback Frequency response

1.Check to see if the reading of the frequency counter & Wow flutter meter is within 2940-3090 Hz( FWD/REV ), and less than 0.35% ( JIS RMS ).

2.In case of out of specification, adjust the motor with a builtin volume resistor.

1.Play the test tape ( VT724 : 1kHz ) back and set the volume position at 2V.

2.Play the test tape ( VT739 )back and confirm 0

3dB at1kHz/

8kHz and -4+2dB at 1kHz/125Hz.

3.When 8kHz is out of specification, it will be necessary to readjust the azimuth.

Built-in volume resistor

Tape Speed 2940-3090Hz Wow&Flutter Less than

0.35% (JIS RMS)

Speaker out 1kHz/8kHz

: 0dB 3dB,

125Hz/1kHz : -4dB+2dB,

(No.49783)1-15

KS-F345

4.1 LC75823W (IC651) : LCD driver

• Pin Layout & Symbol

S8 S9

S10

S11 S12 S13 S14 S15 S16

SECTION 4

Description of major ICs

DATA

CLOCKCEOSC

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Vss

INH

VDD

COM3

COM2

COM1

S52

S51

S50

S49

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

S48 S47 S46 S45 S44 S43 S42 S41 S40 S39 S38 S37 S36 S35 S34 S33

S17

S18

S19

S20

S21

S22

S23

S24

S25

S26

S27

S28

S29

S30

S31

• Pin function

S32

Pin No. Symbol I/O Functions

1 to 7 -- Non connect

8 to 52 S8 to S52 O Common driver output pins. The frame frequency is given by : t0=(fosc/384)Hz.

53 S53 to S55 -- Power supply connection. Provide a voltage of between 4.5 and 6.0V.

57 INH

I Display turning off input pin.

="L" (Vss) ----- off (S1 to S52, COM1 to COM3="L"

INT INT="H" (VDD)----- on Serial data can be transferred in display off mode.

58, 59 Non connect

60 Vss -- Power supply connection. Connect to GND.

61 OSC I/O Oscillator connection.

An oscillator circuit is formed by connecting an external resistor and capacitor at this pin.

62 CE I Serial data interface connection to the controller. CE : Chip enable

63 CLOCK I Serial data interface connection to the controller. CL : Sync clock

64 DATA I Serial data interface connection to the controller. DI : Transfer data

1-16 (No.49783)

4.2 LC72362N-9B40 (IC701) : Micon

•Pin layout

24 - 1

KS-F345

41 - 64

• Pin functions

Pin No. Symbol I/O Function

1 XIN I Crystal oscillator

2GND-To GND

3 J BUS SI I Bus serial data input from CP751

4 J BUS SO O Bus serial data output to CP751

5 J BUS SCK O Bus serial clock output to CP751

6 J BUS I/O SEL O BUS I/O switch signal output

7 NC - Non connect

8 LCD SO O Serial data output to IC651

9 LCD SCK O Serial clock output to IC651

10 LCD CE O Chip enable output to IC651

11 NC - Non connect

12 E.VOL SO O Serial data output

13 E.VOL SCK O Serial clock output

14 CE O Non connect

15 TUNER ILLUM - Non connect

16 TAPE ILLUM - Non connect

17 CD ILLUM - Non connect

18 DIMMEROUT - Non connect

19 NC - Non connect

20 NC - Non connect

21 NC - Non connect

22 NC - Non connect

23 NC - Non connect

24 NC - Non connect

25 KS1 - Non connect

26 KS0 O Initializing output port

27 K3 I Initializing input port

28 K2 I Initializing input port

29 K1 - Non connect

30 K0 I Initializing input port

31 Vdd - Power supply

32 TEST I Test iput

33 NC - Non connect

34 SEEK/STOP O Output the "If signal request"

35 MONO O Monaural and stereo change

over output

36 R/T - Non connect

37 NC - Non connect

38 POWER CNT O Power control output

39 NC - Power supply

40 NC - Non connect

41 IF CONT - IFC control

Pin No. Symbol I/O Function

42 NC - Non connect

43 NC - Non connect

44 NC - Non connect

45 NC - Non connect

46 NC - Non connect

47 NC - Non connect

48 TAPE IN I H:RADIO L:TAPE

49 F/R SENCE I FORWARD/REVERSE switch

detector

50 TAPE MUTE I DIR.FF/REW.MUTE

51 SD/ST I Station detector and ST input

52 NC - Non connect

53 DETACH I Detection of Front Panel

54 NC - Non connect

55 J BUS INT - Non connect

56 REMOCON - TO GND

57 FM/AM I Change over the FM/AM iuput

58 DOLBY - Non connect

59 NC - Non connect

60 MUTE - The mute time is controlled by

the connected capacitor when changing over the FM/AM

61 MEMORY DET I Memory detector input

62 LEVEL METER I Non connect

63 SMETER I Signal meter input

64 KEY 2 I Momentary key input

65 KEY 1 I Momentary key input

66 KEY 0 I Momentary key input

67 ACCDET I ACC DET

68 SENS - To GND

69 NC - Non connect

70 FM/AM IF COUNT - AM/FM Frequency detection

71 NC - Non connect

72 NC - Non connect

73 Vdd - Power supply

74 AM OSC - Non connect

75 FM OSC I Input the local oscillator signal of

76 Vss - Connect to GND

77 NC O Non connect

78 EO O PLL Error signal output

79 TEST 1 - To GND

80 XOUT O Crystal oscillator

(No.49783)1-17

KS-F345

4.3 LC75421M-X (IC931): E. volume

• Pin layout

36 ~ 19

1 ~ 18

• Block diagram

CCB

INTERFACE

LVref

CONTROL

CIRCUIT

LOGIC

CIRCUIT

CONTROL

RVref

222120

1-18 (No.49783)

• Pin functions

Pin No Symbol Function

1 DI Serial data input terminal for control

2 CE Chip enable terminal

3 VSS GND

4 LROUT Rear Lch fader output terminal

5 LFOUT Front Lch fader output terminal

6 LFIN Front Lch input terminal

7 LOUT C & R connection terminal for super bass band

8 LSB C & R connection terminal for super bass band

9 LBASS2 C & R connection terminal for bass band

10 LBASS1 C & R connection terminal for bass band

11 LTRE Capacitor connection terminal for treble band filter

12 LIN Lch input terminal

13 LSELO Input selector output terminal

14 L5 input signal terminal

15 L4 input signal terminal

16 L3 input signal terminal

17 L2 input signal terminal

18 L1 input signal terminal

19 Vref Power supply for analog GND

20 R1 input signal terminal

21 R2 input signal terminal

22 R3 input signal terminal

23 R4 input signal terminal

24 R5 input signal terminal

25 RSELO Input selector output terminal

26 RIN Rch input terminal

27 RTRE Capacitor connection terminal for treble band filter

28 RBASS1 C & R connection terminal for bass band filter

29 RBASS2 C & R connection terminal for bass band filter

30 RSB C & R connection terminal for super bass band filter

31 ROUT C & R connection terminal for super bass band filter

32 RFIN Rch input terminal

33 RFOUT Front Rch fader output terminal

34 RROUT Rear Rch fader output terminal

35 VDD Power supply terminal

36 CL Serial clock output terminal for control

KS-F345

(No.49783)1-19

KS-F345

4.4 LA4743K (IC981) : Power amp.

• Block diagram

IN 1

TAB

IN 2

0.22 F

Vcc 1/2 Vcc 3/4

6 20

Protective

circuit

2200 F 0.022 F

OUT 1+

OUT 1-

PWR GND1

OUT 2+

OUT 2-

PWR GND2

ST BY

R.F

47 F

IN 3

PRE GND

IN 4

+5V ST ON

0.22 F

N.C

0.22 F

Stand by

Switch

Mute

Ripple

Filter

Mute

circuit

3.3 F

10K

OUT 3+

OUT 3-

Low Level Mute ON

PWR GND3

OUT 4+

OUT 4-

Protective

circuit

ON TIME C

1-20 (No.49783)

22 F

Muting &

ON Time Control

Circuit

PWR GND4

• Terminal layout

TAB

GND

FR-

STDBY

FR+

VP1

RR-

GND

RR+

RIPPLE

INRF

INRR

SGND

FLIN

RLIN

DNTIME

RL+

GND

RL-

VP3

FL+

MUTE

FL-

GND

• Pin function

Pin No. Symbol Function

1 TAB Header of IC

2 GND Power GND

3 FR- Outpur(-) for front Rch

4 STDBY Stand by input

5 FR+ Output (+) for front Rch

6 VP1 Power input

7 RR- Output (-) for rear Rch

8 GND Power GND

9 RR+ Output (+) for rear Rch

10 RIPPLE Ripple filter

11 RRIN Rear Rch input

12 FRIN Front Rch input

14 FLIN Front Lch input

15 RLIN Rear Lch input

16 ONTIME Power on time control

17 RL+ Output (+) for rear Lch

18 GND Power GND

19 RL- Output (-) for rear Lch

20 VP3 Power input

21 FL+ Output (+) for front

22 MUTE Muting control input

23 FL- Output (-) for front

24 GND Power GND

25 NC Non connection

KS-F345

(No.49783)1-21

KS-F345

4.5 AN80T05LF (IC781) : Regulator

• Pin layout & Block diagram

Reference Voltage

Thermal

Protection

ASO & Peak

Current Protection

Pre

Drive

Pre

Drive

AMP

Out

AMP

Out

Pre

Drive

123456789101112

ILL

MODE2 MODE1 STB VDD

10V

5.6V

AMP VCC ANT COM

8.7VAM8.7VFM8.7V

• Pin function

Pin No. Symbol Function

1 ILL 10V power supply for illumination.

2 MODE2 When 5V is input,becomes AM. and the antenna output is turned on.

3 MODE1 When 5V is input,becomes AM. and the output of FM is switched.

4 STB When 5V is input outputs to ILL,COM and AMP. It is 0V usually.

5 VDD 5.6V power supply.

6 AMP Power supply supply to remote amplifier

7 VCC Back up. connects with ACC with it.

8 ANT Power supply supply to auto antenna.

9 COM 8.7V power supply.

10 AM The power supply of 8.7V to AM.

11 FM The power supply of 8.7V to FM.

12 GND Ground

Pre

Drive

Pre

Drive

GND

4.6 UPC1228HA (IC901) : Head amp

• Pin layout & Block diagram • Pin function

Pin No. Symbol

1 Input 1

AMP1 AMP2

2 Negatice feed back 1

3 Output 1

4 Power supply; +Vcc

2345678

5 Ground

6 Output 2

7 Negative feed back 2

8 Input 2

1-22 (No.49783)

KS-F345

(No.49783)1-23

KS-F345

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.49783)

Printed in Japan

200303WPC

SCHEMATIC DIAGRAMS

CASSETTE RECEIVER

KS-F345

CD-ROM No.SML200303

KS-F345

Contents

Block diagram Standard schematic diagrams Printed circuit boards

S.BASS

SEL

DISP

SSM

SCMMO

Area Suffix

EE ---- Russian Federation

2-1 2-2 2-5,6

No.49783SCH

2003/03

KS-F345

Safety precaution

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.

Block diagram

DIRECTION BOARD

MAIN

MOTOR

MUTE SWITCH

TAPE/RADIO SW

CP722

RELAY

BOARD

CP721

CN721

TO SPEAKER CONNECTOR

CP981

LINE REAR OUT

CJ921

KS-F345

HEAD

PROG-SW

CJ901

Lch Front

Lch Rear

Lch Rear OUT

F/R

LCH

IC981

POWER AMP.

IC901

HEAD AMPLIFIER

Lch RearLch Front

IC931

E.VOLUME

TAPE L

CN901

CP901

ANT

TAPE IN PROG

TUNER L

CE DATA CLK

IC701

TU1

AM/FM TUNER PACK

SEEK/STOP, MONO, SD/ST, S METER, FM OSC, EO, BAND

SYSTEM CONTROL MICON

F/R

CJ701

DATA CLOCK CE

KEY0 - 2

CP701

LCH

HEAD AMP SECTION

LCD1

S3 - S47 COM1 - COM3

IC651

LCD DRIVER

KEY

S601 - S606

S608 - S612 S614 - S621

MAIN AMP SECTION

LCD & KEY CONTROL SECTION

AB CD E F G

2-1

+ 60 hidden pages