Jvc Ks-fx834r User manual

SERVICE MANUAL

CASSETTE RECEIVER

No.49571

Sep. 2000

KS-FX834R

Area Suffix

E ---- Continental Europe

Contents

Safety precaution

Disassembly method

Adjustment method

Description of major ICs

This service manual is printed on 100% recycled paper.

1-2

1-3

1-10

1-14

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KS-FX834R

1-2

!

CAUTION

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.

Safety precaution

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KS-FX834R

1-3

Disassembly method

Removing the front panel unit (See Fig.1)

1.

2.

Remove the two screws Aattaching the front

chassis.

Insert a screwdriver to the two joints aon the side

of the front chassis, two joints bon the right side

and one joint cfrom upside, then detach the front

chassis toward the front side.

1. Press the release switch and remove the front

panel unit in the direction of the arrow.

Removing the front chassis (See Fig.2~3)

Removing the heat sink (See Fig.4)

1. Remove the three screws Battaching the heat sink

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

sink.

b

a

b

c

A

B

Heat sink

Fig.2

Fig.1

Fig. 3

Fig. 4

Front chassis

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KS-FX834R

1-4

Removing the bottom cover

(See Fig.5)

1.

2.

Turn the body upside down.

Insert a screwdriver to the two joints dand two

joints eon both sides of the body and the joint fon

the back of the body, then detach the bottom cover

from the body.

Removing the rear panel

(See Fig.6 )

1.

2.

3.

4.

Remove the front chassis.

Remove the heat sink.

Remove the bottom cover.

Remove the five screws Battaching the rear panel

and one screw Cattaching the pine jack on the

back of the body.

Removing the main amplifier board

assembly

(See Fig.7)

1.

2.

3.

4.

5.

Remove the front chassis.

Remove the bottom cover.

Remove the rear panel.

Remove the two screws Dattaching the main

amplifier board assembly on the top cover.

Disconnect connector CP701 on the main amplifier

board assembly from the cassette mechanism

assembly.

d

e

f

Bottom cover

Fig. 5

Fig. 6

Fig. 7

B

C

B

D

CP701

Main board assembly

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KS-FX834R

1-5

Cassette mechanism assembly

F

FF

Top cover

Fig. 8

GG

Fig. 9

Fig. 10

LCD & Key control board

F

Removing the Cassette mechanism

assembly (See Fig.8)

1.

2.

3.

4.

Remove the front chassis.

Remove the bottom cover.

Remove the main amplifier board assembly.

Remove the fore screws Fattaching the cassette

mechanism assembly from the top cover.

Removing the control switch board

(See Fig.9 and 10 )

1.

2.

3.

Remove the front panel unit from the main body.

Remove the five screws Gattaching the rear cover

on the back of the front panel unit.

Remove the control switch board from the front

panel unit.

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KS-FX834R

1-6

For the 6pin harness extending from connector

CN402 on the mecha control P.W.B, disconnect it

from the head relay P.W.B.

Disconnect the card wire from connector CN403 on

the mecha control P.W.B.

Remove the screw A attaching the mecha control

P. W. B .

Move the tab a as shown in Fig.2 and remove the

mecha control P.W.B. while moving it in the direction

of the arrow.

1.

2.

3.

4.

Removing the mecha control P.W.B.

(See Fig.1 and 2)

Disconnect the 6pin harness from connector CN402

and the card wire from CN403 on the mecha control

P.W.B. (Refer to Fig.1 and 2).

Remove the four screws B on the bottom of the

cassette mechanism.

1.

2.

Removing the cassette mechanism

assembly (See Fig.1 to 3)

Fig.1

Cassette mechanism ass’y

Head relay

P.W.B.

6pin

harness

CN402 CN403

CN402

Mecha control P.W.B.

Fig.2

Tab a

Mecha control P.W.B.

Fig.3

Cassette mechanism ass’y

B

A

Mecha control P.W.B.

CN403

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KS-FX834R

1-7

Unsolder the soldering b on the head relay P.W.B.

Remove the screw C attaching the head relay P.W.B.

Remove the head relay P.W.B. in the direction of the

arrow while releasing the two joints c.

1.

2.

3.

Removing the head relay P.W.B.

(See Fig.4)

Remove the E washer attaching the load arm using

a pincette or something like that and remove the

spring d.

Move the part of the load arm marked upwards to

release it from the axis of rotation. Then rotate the

load arm in the direction of the arrow to remove it

from the cach.

1.

2.

Removing the load arm (See Fig.5)

Prior to performing the following procedure, remove

the head relay P.W.B.

Remove the screw D attaching the sub chassis.

Push the tab e in the direction of the arrow to detach

the one side of the sub chassis. Then release the

sub chassis from the tab f.

*

1.

2.

Removing the sub chassis (See Fig.6)

Prior to performing the following procedure, remove

the head relay P.W.B., the load arm and the sub

chassis.

Remove the screw E attaching the reinforce bracket.

Remove the reinforce bracket.

Push the tab g fixing the cassette holder in the

direction of the arrow and open the cassette holder

and the holder arm upward until they stop at an

angle of 45 degrees. Move the two joints h to the

side and remove the cassette holder and the holder

arm from the shaft.

*

1.

2.

3.

Removing the cassette holder and the

holder arm in the eject mode

(See Fig.7 and 8)

Fig.4

CSoldering b Joint c

Fig.6

Tab f

D

Tab e

Cach

Head relay P.W.B.

Fig.7

Reinforce bracket

Reinforce

bracket

E

Cassette holder

Sub chassis

Head relay

P.W.B.

Joint h

Holder arm

Load arm

Joint h

tab g

Fig.5

Spring d

Load arm E washer

Cassette mecha chassis

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KS-FX834R

1-8

Prior to performing the following procedure, remove

the head relay P.W.B.and the sub chassis.

Remove the two screws F attaching the play head

(The spring under the play head comes off at the

same time).

*

1.

Removing the play head (See Fig.9)

Prior to performing the following procedure, remove

the head relay P.W.B. and the sub chassis.

Push each tab i in the direction of the arrow and pull

out the pinch rollers on both sides.

*

1.

Removing the pinch roller ass’y

(See Fig.9)

Unsolder the soldering j on the reel disc P.W.B.

Push the seven tabs k on the bottom of the cassette

mechanism assembly in the direction of the arrow.

1.

2.

Removing the reel disc P.W.B.

(See Fig.10)

Unsolder the two soldering l of the motor and the sub

motor.

Release the sub motor from the three tabs m. Push

the sub motor upward and pull out it.

Remove the belt on the bottom of the cassette

mechanism assembly and remove the two screws G

attaching the motor.

1.

2.

3.

Removing the motor and the sub motor

(See Fig.10 and 11)

The motors can be detached before

removing the load arm.

ATTENTION:

Fig.8

Cassette holder

and holder arm

Joint h

Shaft

Joint h

Fig.9

Tab i

Pinch roller ass’yPinch roller ass’y

F

Play head

Spring

Fig.11

Sub motor

Tab m

Load arm

Motor

Soldering l

Tab m

Soldering l

Tab m

Soldering j

Pinch roller ass’y

Tab i Tab i

Tab i

Fig.10

Cassette mechanism ass’y

Tabs k

Reel disc P.W.B.

Soldering j

Tabs k

G

Motor Belt

Flywheel

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KS-FX834R

1-9

Prior to performing the following procedure, remove

the head relay P.W.B, the load arm, the sub chassis,

the cassette holder, the holder arm and the reel disc

P. W. B .

Remove the belt on the bottom of the cassette

mechanism ass’y.

Remove the slit washer attaching the flywheel on the

upper side of the cassette mechanism ass’y and pull

out the flywheel downward. Then remove another

flywheel in the same way.

1.

2.

3.

Removing the flywheel

(See Fig.10 and 12)

Prior to performing the following procedure, remove

the head relay P.W.B, the load arm, the sub chassis,

the cassette holder and the holder arm.

Disengage the part n inside of the reel driver which

engages with the shaft, using a pincette or

something like that. Then remove the reel driver from

the shaft.

Remove the reel driver spring and the reel table.

*

1.

2.

Removing the reel disc ass’y( )

(See Fig.12 to 14)

When reassembling, make sure to use

a new slit washer.

ATTENTION:

Fig.10

Cassette mechanism ass’y

Tab k

Reel disc P.W.B.

Soldering j

Tab k

G

Motor Belt

Flywheel

Fig.12

Plate

The part n

Reel driver

Reel disc ass’y( )

Push aside

the gear

Tabs o

Reel disc

ass’y( )

The part n

Reel driver

Tab o

Fig.13

Reel driver

Shaft

The part n

Fig.14

Reel driver spring

Reel table

Slit washer

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KS-FX834R

1-10

Adjustment method

Test instruments required for adjustment

1. Digital oscilloscope(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)

Measuring conditions(Amplifier section)

Power supply voltage .............. DC14.4V (10.5 - 16V)

Load impedance ........... 4 (2 Speakers connection)

Line out............................................................ 20k

Standard volume position

Balance and Bass,Treble volume .Fader

:Center(Indication"0")

Loudness,Dolby NR,Sound,Cruise:Off

following conditions. Playback the test tape VT721.

AM mode 999kHz/62dB,INT/400Hz,30%

modulation signal on receiving.

FM mono mode 97.5MHz/66dB,INT/400Hz,22.5kHz

deviation pilot off mono

FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev.

Output level 0dB(1 V,50 /open terminal)

MC-109C For TAPE CURL confirmation

(without Pad type)

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KS-FX834R

1-11

Head section view

Cassette mechanism

(Surface)

Arrangement of adjusting & test points

Motor assembly

Tape speed adjust

Playback head

Azimuth screw B

(Reverse)

Azimuth screw B

(Reverse)

Azimuth screw A

(Forward)

Azimuth screw A

(Forward)

Playback Head

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KS-FX834R

1-12

EXTKSRT002-18P

Information for using a car audio service jig

1. 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 : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly

and main board assembly.

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

Disassembly method

1. Remove the bottom cover.

2. Remove the front panel assembly.

3. Remove the top cover .

4. Install the front panel.

5. Confirm that current is being carried by connecting

an extension cord jig.

Note

Available to connect to the CP701 connector when in-

stalling the front panel.

Cassette mechanism

to Main board

to Cassette mechanism

Front panel assembly

Main board

Extension cord

EXTKSRT002-18P

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KS-FX834R

1-13

Mechanism adjustment section

Item Adjusting & Confirmation Methods Adjust Std. Value

1.Check to see if the reading of the frequency counter & W ow

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 built-

in 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/

10kHz and -4+2dB at 1kHz/63Hz.

3.When 10kHz is out of specification, it will be necessary to

read adjust the azimuth.

Phase

045

Built-in

volume resistor Tape Speed

2940-3090Hz

Wow&Flutter

Less than

0.35%

(JIS RMS)

Speaker out

1kHz/10kHz

: 0dB 3dB,

63Hz/1kHz

: -4dB+2dB,

1. Tape running

adjustment

2. Azimuth

adjustment

confirmation

a) At forward play mode, make adjustment of peak of Lch / Rch

output with Azimuth screw A.

* For Oscilloscope litharge corrugation, set 45 as standard.

b) At Reverse play mode, make adjustment of peak of Lch / Rch

output with Azimuth screw B.

* For Oscilloscope litharge corrugation, set 45 as standard.

c) With AC volt meter confirm the difference of output for 4ch

between Lch / Rch at forward play mode and Lch / Rch

Reverse play mode being within 3.0dB.

d) After operation, make confirmation of Lch / Rch azimuth

output being within 1.0dB from adjustment value.

a) At Forward playmode, using mirror tape, make adjustment

with Azimuth screw A and Azimuth screw B, without curl of 4

parts of head tape guide.

b) At Reverse play mode, using mirror tape, make adjustment

with Azimuth screw A and Azimuth screw B, without tape

curl of 4 parts of head guide.

c) At Forward / Reverse play mode, make confirmation of no

tape curl of 4 parts of head tape guide.

2.Tape Speed and

Wow & Flutter

3.Playback

Frequency

response

Azimuth

screw A

Azimuth

screw B

HEAD

Tape guide

OK

HEAD TAPE

Tape curl NG

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KS-FX834R

1-14

2. Pin function

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

PBTC1

PBOUT1

OUTREF1

TAPEIN1

Vcc

NC

LINEOUT1

TCH1

NC

MSLPF

G2FB

G1FB

MSTC

MSOUT

NC

NRSW

MUTESW

TAPESW

DRSW

MSMODE

MSSW

NC

TCH2

LINEOUT2

Pin No. Symbol

-

O

I

-

O

-

O

-

I

-

O

Playback equalizer amplifier

capacitance

Playback equalizer amplifier

output

Output reference

TAPE input

Power supply

Line output

Time constant for the HLS

Cut-off frequency adjustment

of the music sensor LPF

Music signal interval detection

Time constant for detecting

music signal interval

Music sensor out

No use

Dolby NR control

Mute function control

Playback equalizer amplifier

control

Head select control

Music sensor mode control

Music sensor control

Time constant for the HLS

Line output

I/O Function

Pin No. Symbol

I/O Function

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

DIREF

GND

TAPEIN2

OUTREF2

PBOUT2

PBTC2

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

-

I

O

-

I

-

I

O

I

-

I

Resistance for setting the

reference

Ground

TAPE input

Output reference

Playback equalizer amplifier

output

Playback equalizer amplifier

capacitance

Playback equalizer amplifier

feedback

Playback equalizer amplifier

input

Playback equalizer amplifier

ground

Playback equalizer amplifier

input

Center

Playback equalizer amplifier

reference

Playback equalizer amplifier

input

Playback equalizer amplifier

ground

Playback equalizer amplifier

input

Playback equalizer amplifier

feedback

PBFB2

PBRIN2

PBGND

PBFIN2

VCT

PBREF

PBFIN1

PBGND

PBRIN1

PBFB1

MSMODE

DRSW

TAPESW

MUTESW

NRSW

MSOUT

MSTC

G1FB

G2FB

PBTC2

PBOUT2

OUTREF2

TAPEIN2

GND

DIREF

LINEOUT2

TCH2

NC

MSSW

PBTC1

PBOUT1

OUTREF1

TAPEIN1

Vcc

NC

LINEOUT1

TCH1

NC

MSLPF

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31

32

33

34

35

36

37

38

39

40

7k/12k

300k

F2

F1

30k

45k

300k

7k/12k

F3

OFF/B

100k

T1

-

+

-

70 /120 70 /120

x1

x1 T2

100k OFF/B

NR

BIAS

MUTE

TAPE EQ

FWD/RVS

LPF +

-DET

Vcc

MS MODE

NR MODE

MS ON/

OFF

-

+

NC

+

-

1.Pin layout & block diagram

CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp.

Description of major ICs

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

KS-FX834R

1-15

12 34 56 78 9101112

BA4905-V3 (IC901) : Regulator

1.Terminal layout

2.Block diagram

EXT

EXT ACC AUDIO 9V CTRL ILM 10V GND

RESET

RESET COMP VDD 5.7V CD 8V VCC AJ

1 2 3 4 5 6 7 8 9 10 11 12

37K

5K

REGULATOR

Overvoltage

protection circuit

Pin no. Symbol Function

RESET

EXT output

COMP output

ACC

VDD output

AUDIO output

CD output

CTRL

VCC

ILM output

AJ

GND

1

2

3

4

5

6

7

8

9

10

11

12

If VDD voltage becomes 4V or less.RESET output becomes low level.

This output voltage is approximately 0.5V lower than VCC. and max

output current is 300mA.

A voltage supply for ACC block. This output voltage is approximately

0.7V lower than VDD'S. The max output current is 100mA.

Control of the COMP output by inputting voltage.

This output voltage is 5.7V, and max output current is 100mA.

This voltage supply is for microcomputer. Whenever back up voltage

supply is connected, the output keeps on running.

This output voltage is 9.0v, and max output current is 500mA.

This voltage supply for AUDIO.

This output voltage is 8.0V, and max output current is 1A.

This voltage supply for CD.

Output selector of CD. AUDIO, ILM and EXT.

To be connected with the BACK UP of car.

This output voltage is 10V, and max output current is 500mA.

Output voltage is adjustable.

Putting a resistance between ILM and AJ or between AJ and GND

makes ILM output voltage adjustable.

Ground.

3.Pin function

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

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KS-FX834R

1-16

Pin No. Port Name I/O Descriptions

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

33

34

35

36

37

38

39

40

KEY 0

KEY 1

KEY 2

LEVEL

SM

SQ

LCDCE

LCDDA

LCDSCK

BUSI/O

OPEN

BUSSI

BUSSO

BUSSCK

NC

INLOCK

NC

GNDPORT

VDDPORT

NC

AFCK

MONO

FM/AM

SEEK/STP

NC

IFC

VDDPLL

FMOSC

NC

GNDPLL

AMEO

FMEO

IC

SD/ST

STAGE0

NC

MOTOR

I

O

I

O

I/O

-

O

I

-

I

-

O

-

I

-

O

Key input 0

Key input 1

Key input 2

Level meter input

S.meter level input

S.Quality level input

CE output to LCD driver

Data output to LCD driver

Clock output to LCD driver

I/O selector output for J-BUS, H : OUT, L: INPUT

Door open detect input

J-BUS Data input

J-BUS Data output

J-BUS Clock in/output

Non connect

Port GND

Port Vdd

Non connect

AF check output, L: AF check

Monaural on /off selecting output, H:mono on

FM/AM switching output L : FM H : AM

Auto seek /stop selecting output, H: Seek, L:Stop

Pulse signal input port for Cruise control

FM/AM midle frequency counter input

PLL Vdd

FM/AM limited generator frequency input

None connect

PLL GND

AM error out output

FM error out output

GND

Station detector, Stereo signal input, H:Find Station, L:Stereo

Pull up

Non connect

Main motor output

UPD178018AGC-551 (IC701) : Main system control CPU

1. Pin layout

2. Pin function

1

20

60

41

21 ~ 40

80 ~ 61

~

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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KS-FX834R

1-17

Pin No. Port Name I/O Descriptions

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

FF/REW

F/R

DOLBY

MSIN

I2CCLK

I2CDAO

I2CDAI

REEL

SUBMO1

SUBMO2

MODE

TAPEIN

STANDBY

NC

BEEP

MUTE

PCNT

TELMUTE

DIMIN

DIMOUT

ENC1

ENC2

ACCDET

POWER

RDSSCK

RDSDA

REMOCON

DETACH

J-BUSINT

REGCPU

GND

X2

X1

REGOSC

VDD

RESET

I

O

I

O

I

O

I

O

I

-

O

I

O

I

O

I

-

I

-

Output for input signal level switching for MS L : FF,REW H : PLAY

FWD,REV running direction switch signal input

Dolby on "H" output

MS input

I2C information clock output

I2C information data output

I2C information clock input

Switch for detecting tape end position

Sub motor clock direction input

Sub motor clock opposite detection drive output

Mechanism mode position detection input

Cassette in detection input H : cassette in L : cassette out

Standby position detection input H : eject side L : operation side

Non connect

Touch tone output

Mute output , L : mute on

Power ON /OFF switching output , H : power on

Telephone mute signal detection input

Dimmer signal detection input L : dimmer

Dimmer control output , Dimmer off L output

Rotary volume signal 1 input Power save : L

Rotary volume signal 2 input

Power save 1 Working together ACC Power save : L

Power save 2, Working together Back up by H input, stop mode

Clock input for RDS

RDS data input

Remocom input

Detach signal input H : Power save

Cut-in input for J-BUS signal

Regulator for CPU power supply, Connect the GND with0.1 F.

Ground

Connecting the crystal oscillator for system clock

Regulator for oscillator circuit.Connect the GND with 0.1 F.

Vdd

Pull up

UPD178018AGC-551

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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KS-FX834R

1-18

HA13158A (IC301) : Power amp

1. Pin layout

2. Block diagram

IN1

IN2

IN3

IN4

STBY

2

1

11

13

23

10

TAB

PROTECTOR (ASO

SURGE, TSD)

INPUTBUFFER1

INPUTBUFFER2

INPUTBUFFER3

INPUTBUFFER4

AMP1

AMP2

AMP3

AMP4

MUTE

PVCC1PVCC2

INVCC

+

-

+

-

+

-

+

-

12 22

14 18 6

3

4

5

7

8

9

15

16

17

19

20

21

1 ~ 23

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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KS-FX834R

1-19

Vcc Vcc

Input

See Function Table

1A

2A

3A

4A

1C

2C

3C

4C

1Y

2Y

3Y

4Y

Output

Sample as Load Circuit 1

1k

S1

CL

Inputs Outputs

C

L

H

A

X

L

H

Y

Z

H

L

1

2

3

4

5

6

7

14

13

12

11

10

9

8

HD74HC126FP-X (IC801) : Buffer

1. Pin layout

3. Block diagram

2. Function

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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KS-FX834R

1-20

AMP

AGC

Detector

BPF

I/V

conversion

PD

Vcc

Comp

22k

ohm

magnetic shield

Vcc

Rout

GND

for

trimming

circuit

RPM6938-SV4 (IC602) : Remote control receiver

1 2 3 4 5 6 7 8 9

10

GND OUT1 P1 VZ IN1 IN2 VCC1 VCC2 P2 OUT2

Input Output Mode

IN1 IN2 OUT1 OUT2

Brake

0 0 0 0

1 0 1 0

0 1 0 1

1 1 0 0

CLOCKWISE

COUNTER-CLOCKWISE

Brake

LB1641 (IC402) : DC Motor Driver

1. Pin Layout 2. Pin Functions

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

JVC KS-FX834R User manual

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