Kenwood RDVH-7 Service manual

673

606

610

652

671

621

607 672 616

620

605

eject

on/standby

mode

stereo amplifier/tuner/CD RD-VH7

standby timer

phones

tuning

band

demo

auto

/mono

p.call enter

input

stop

multi control

609 664 J1 J5 J2 J1

J2J3J4A1631

STEREO AMPLIFIER/TUNER/CD PLAYER

70%

RD-VH7

SERVICE MANUAL

(VH-600/700)

Knob(EJECT) * (K29-)

Indicator (B12-0360-04)

Dressing panel * (A21-)

Dressing panel (A21-3761-02)

Dressing panel (A21-3760-02)

Knob (K29-7556-04)

Escutcheon (B07-2452-13)

Panel (A60-1647-11)

Front glass (B10-3488-03)

Insulator assy (J02-1444-24)

Knob(POWER) (K29-7554-04)

Side plate (A50-1326-02)

Power cord bushing (J42-0083--05)

Oscillating module (W02-1114-15)

AC power cord * (E30-)

In compliance with Federal Regulations, following are reproductions of labels on, or inside the product relating to laser product safety.

Lock terminal board (E70-0052-05)

Screw terminal board (E70-0111-05)

Rectangular receptacle (E08-0311-05)

KENWOOD-Corp. certifies this equipment conforms to DHHS Regulations No. 21 CFR 1040. 10, Chapter 1, Subchapter J.

DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.

Phono jack (E63-0164-05)

Phono jack (E63-1089-05)

Phono jack (E63-1088-05)

*Refer to parts list on page 31.

Phono jack (E63-1082-05)

TIMERSLEEP

POWER

REPEAT

123

456

789

+10 0 +100

RANDOM

P.MODE

CHECK

CLEAR

MUTE

CDMDTAPE

INPUT

AUTO/MONO TUNER/BAND

DISPLAY MEMORY TONE

REMOTE CONTROL UNIT

RC-RP0702

N.B.

TAPE MD

P.CALL

O.T.E.

TIMERSLEEP

POWER

REPEAT

123

456

789

+10 0 +100

RANDOM

P.MODE

CHECK

CLEAR

MUTE

CDMDTAPE

INPUT

AUTO/MONO TUNER/BAND

DISPLAY MEMORY

TA/NEWS PTY

TONE

REMOTE CONTROL UNIT

RC-RP0702E

N.B.

TAPE MD

P.CALL

O.T.E.

AM loop antenna (1) (T90-0842-05)

Remote control unit (1) (A70-1282-05) : RC-RP0702 Battery cover (A09-1148-08)

Remote control unit (1) (A70-1283-05) : RC-RP0702E Battery cover (A09-1148-08)

Batteries (R6/AA) (2)

Replacement front feet (2) (J02-0130-05)

Front feet replacement tool (Allen wrench) (1) (W01-0084-05)

FM indoor antenna (1) (T90-0841-05)

RD-VH7

Operation to reset

The microcomputer may fall into malfunction (impossibility to operate, erroneous display, etc.) when the power cord is unplugged while power is ON or due to an external factor. In this case, execute the following procedure to reset the microcomputer and return it to normal condition.

RD-VH7 Unplug the power cord from the wall AC outlet and, while holding the “7 stop” key depressed, plug the power cord again.

÷If a CD has been loaded in the unit, it will be

ejected automatically.

÷ Please note that resetting the microcomputer

clears the contents stored in it returns it to condition when it left the factory.

CONTENTS / ACCESSORIES

CONTENTS / ACCESSORIES .................................. 2

DISASSEMBLY FOR REPAIR....................................3

BLOCK DIAGRAM......................................................4

CIRCUIT DESCRIPTION............................................5

CD MECHANISM DESCRIPTION ............................11

ADJUSTMENT..........................................................14

Accessories

PARTS DESCRIPTIONS..........................................15

PC BOARD ...............................................................16

SCHEMATIC DIAGRAM...........................................19

EXPLODED VIEW ....................................................29

PARTS LIST..............................................................31

SPECIFICATIONS ......................................Back cover

SPEAKER

System configuration

SYSTEM CD CASSETTE

NAME RECEIVER DECK VH-600 RD-VH7 - LS-VH7 VH-700 RD-VH7 X-VH7 LS-VH7

DISASSEMBLY FOR REPAIR

1x2x4

(X14) (A/6)

MAIN PCB (X09)

8x3

5x3

5x2

(X09) (B/4)

REMOVE CD MECHANISM

After remove insulator ass'y, then remove some LR side board. Next remove the top and the bottom boards.

1) Remove the 6 screws1, then remove the front panel.

2) Remove the 6 screws23, then remove the CD mechanism. When assemble the front panel, insert the phone jack with taking care4.

RD-VH7

ELECTRIC CHECK

After assemble the sub panel and the front panel.

1) Remove the 8 screws 5, 6, then remove PCB(X09:B/4), PCB(X14:A/6).

2) Remove the 2 screws 7, the 3 PC supports8, then remove the CD mechanism.

3) After assemble PCB (X09:B/4) on the main PCB with the rear panel. then connect GND between the rear panel , the antenna and the CD mechanism with 3 alligator clip wires(0).

★ Remove the MULTI CONTROL knob with a string(wires etc)-.

HEADPHONE

12V AVR

TUNER

PACK

AM,FM

ANTENNA

FAN

X-Y POSITION

N.B. BASS TRE.

THERMAL SW

BIAS Cont.

LEVEL SENSOR

PROTECTION

(TILT)SENSOR

STK499-090 MAIN AMP .

Cont.

SYSTEM

TAPE PLAY

MD REC

TAPE REC

T.MUTE

TONE

SELECTOR

REC OUT

Q1-3

IC2

ATT

INPUT

VOLUME

MASTER

IC3

BU4066BCF

A.MUTE

IC1

Q1,2

Q7,8

IC8

Q5,6,10

PH1-4

M30622MC-570FP

MAIN u-COM

LED

TACT KEY

M.C/ENCODER

REMOCON

SENSOR

S2-13

D11,12

DISPLAY u-COM

HD6433297A17F

LCD ASS'Y

IC4

IC5

-13V AVR

-10V AVR

FAN+B

AVR

+6.3V

AVR

+5V AVR

+5.6V

AVR

+5.6V

AVR

MUTE

Q12

CD MECHA DRIVER

FAN

LCD

MUTE

BIAS CHANGE

TUNER PACK

AUDIO

CD MECHA SENSOR

LCD DISPLAY u-COM LED

u-COM

AMP. +B AMP. -B

Q20

Q33

Q17

Q23-26

IC10

IC6

Q22

Q28

DSP/DAC

SERV0

RF AMP

5ch BTL

DISC SENSOR

D10

D11

D18

T1 BACK UP TRANS.

MAIN TRANS.

DIGITAL

ANALOG

IC400

IC401

IC402

PICKUP

MOTOR

DISC

SLED

MOTOR

D1-4,Q1-4

CD SLOT IN MECHANISM (CDM-34)

200mV/100

REC OUT

200mV/47K

INPUT

9.5V/6

SP.OUTPUT (2CH)

S.W. OUT

SPEAKER

LC75396NE

IC403

MD PLAY

AUX

OPTICAL

OUT

(+5V)

RDS

AC IN

MOTOR

A-D

RD-VH7

(X14) (X09)

(X14)

RD-VH7

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

RD-VH7

1. INITIAL SETTING

1-1 INITIAL CONDITIONS

(1) AMP POWER OFF PROTECTION NO DETECTED MUTE OFF SELECTOR TUNER VOLUME 15 BALANCE CENTER NB 2 BASS 0 TREBLE 0 MD INPUT 0 (-6dB) TAPE INPUT 0 (-6dB) AUX INPUT 0 (-6dB) MULTI WINDOW AUTO

(2) TUNER BAND FM Pch MEMORY REFER TO (5) LAST Pch – – LAST FREQ. LOWER LIMIT VALUE OF

EACH BANDS AUTO/MONO AUTO AUTO PRESET (MEMORY) – E ON THRUST RECEIVING MODE

OFF RDS DISPLAY PS

(3) CLOCK, TIMER CLOCK STOP, AM 12:00 PROG. 1,2 ON TIME AM12:00 OFF TIME AM12:00 PLAY MODE PLAY SOURCE TUNER Pch 01ch REC MODE TAPE O. T. T. OFF (AM7:00) TIMER OPERATION MODE OF F SLEEP TIMER OFF(5) A. P. S. OFF

(4) CD PLAY MODE TRACK REPEAT OFF RANDOM OFF OPERATION MODE STOP TIME DISPLAY SINGLE TIME

(5) TUNER PRESET FREQUENCY

E1 K1 E3

1 FM 97.5MHz FM 97.5MHz FM 97.5MHz 2 FM 87.5MHz FM 87.5MHz FM 87.5MHz 3 FM 89.1MHz FM 89.1MHz FM 89.1MHz 4 FM 108.0MHz FM 108.0MHz FM 108.0MHz 5 FM 90.0MHz FM 90.0MHz FM 90.0MHz 6 FM 87.5MHz FM 87.5MHz FM 87.5MHz 7 FM 87.5MHz FM 87.5MHz FM 87.5MHz 8 FM 87.5MHz AM 1610KHz FM 87.5MHz

9 AM 1602KHz AM 1700KHz AM 1602KHz 10 AM 999KHz AM 1000KHz AM 999KHz 11 AM 630KHz AM 630KHz AM 630KHz 12 AM 1440KHz AM 1440KHz AM 1440KHz 13 FM 106.0MHz FM 106.0MHz FM 106.0MHz 14 AM 531KHz AM 530KHz AM 531KHz 15 FM 87.5MHz FM 87.5MHz FM 87.5MHz 16 FM 98.0MHz FM 98.0MHz FM 98.0MHz 17 FM 98.5MHz FM 98.5MHz FM 98.5MHz 18 FM 87.5MHz FM 87.5MHz FM 87.5MHz 19 AM 990KHz AM 990KHz AM 990KHz 20 FM 97.7MHz FM 97.4MHz FM 97.7MHz 21 AM 531KHz AM 530KHz AM 531KHz 22 FM 87.5MHz FM 87.5MHz FM 87.5MHz 23 FM 87.5MHz FM 87.5MHz FM 87.5MHz 24 FM 87.5MHz FM 87.5MHz FM 87.5MHz 25 FM 87.5MHz FM 87.5MHz FM 87.5MHz 26 FM 87.5MHz FM 87.5MHz FM 87.5MHz 27 FM 87.5MHz FM 87.5MHz FM 87.5MHz 28 FM 87.5MHz FM 87.5MHz FM 87.5MHz 29 FM 87.5MHz FM 87.5MHz FM 87.5MHz 30 FM 106.0MHz FM 106.0MHz FM 106.0MHz 31 FM 87.5MHz FM 87.5MHz FM 87.5MHz 32 FM 87.5MHz FM 87.5MHz FM 87.5MHz 33 FM 87.5MHz FM 87.5MHz FM 87.5MHz 34 FM 87.5MHz FM 87.5MHz FM 87.5MHz 35 FM 87.5MHz FM 87.5MHz FM 87.5MHz 36 FM 87.5MHz FM 87.5MHz FM 87.5MHz 37 FM 87.5MHz FM 87.5MHz FM 87.5MHz 38 FM 87.5MHz FM 87.5MHz FM 87.5MHz 39 FM 108.0MHz FM 108.0MHz FM 108.0MHz 40 AM 999KHz AM 1000KHz AM 999KHz

TUNER DESTINATION

2. BACKED UP ITEMS

AC POWER OFF (1) AMP POWER BACK UP PROTECTION CANCELLED MUTE OFF SELECTOR BACK UP VOLUME BACK UP BALANCE BACK UP

RD-VH7

CIRCUIT DESCRIPTION

NB 2 BASS BACK UP TREBLE BACK UP MD INPUT BACK UP TAPE INPUT BACK UP AUX INPUT BACK UP MULTI WINDOW BACK UP

(2) TUNER BAND BACK UP Pch MEMORY BACK UP LAST Pch BACK UP LAST FREQ. BACK UP AUTO/MONO BACK UP AUTO PRESET (MEMORY) BACK UP E ON THRUST RECEIVING MODE

BACK UP

RDS DISPLAY PS

(3) CLOCK, TIMER CLOCK POWER FAILURE MODE PROG. 1, 2

ON TIME BACK UP OFF TIME BACK UP PLAY MODE BACK UP SOURCE BACK UP Pch BACK UP

REC MODE BACK UP O. T. T. BACK UP TIMER OPERATION MODE BACK UP SLEEP TIMER OFF A. P. S. BACK UP

(4) CD PLAY MODE TRACK REPEAT OFF RANDOM OFF OPERATION MODE STOP TIME DISPLAY SINGLE TIME

3. CONDITIONS ACCORDING TO THE

DESTINATION

( ) SIGNIFIES PIN NUMBER OF u-COM(X09, IC4)

u-COM

DESTI-

NATION

J J 0 1 0 FM 76.0MHz~ 87.5MHz 100kHz -10.7MHz 25kHz

K,P K1 0 0 0 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz

M E1 0 0 1 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz

E,T E3 1 1 0 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz

RDS AM 531kHz~1602kHz 9kHz +450kHz 9kHz

DSW

(72PIN)1(71PIN)0(70PIN)

RECEIVING

BAND

FREQUENCY RANGE SPACE

87.5MHz~108.0MHz 50kHz -10.7MHz 25kHz

AM 531kHz~1629kHz 9kHz +450kHz 9kHz

AM 530kHz~1700kHz 10kHz +450kHz 10kHz

AM 531kHz~1602kHz 9kHz +450kHz 9kHz

CHANNEL

IF RF

4. LCD INDICATION

PARTS OFF LCD INDICATION

A PART

B PART

C PART D PART E PART

PROG 1 2 OTT APS RADIO T

5. How to Set the Test Modes

5-1 AUX(MD/TAPE/AUX)

Setting: Insert the power cord to the wall outlet with pressing the MODE key. Cancel: Press any key of operation. A part A of display shows destination(✽).

"standby" LED lights orange and green color alternately in this test mode. A part E of display shows as follows after selecting MD mode.

selector display E display A MD MD##TEST ✽-TYPE#### TAPE TAP#TEST ✽-TYPE#### AUX AUX#TEST ✽-TYPE####

5-1-1 Display Contrast Setting

Display contrast is available in LED and all segments of display lighting Contrast is set to initialization if cancel test mode.

key remarks FF contrast min. skip up initialization play/pause contrast max.

5-1-2 Mute Setting

Muting function is available by pressing AUTO/MONO key.

5-1-3 AUX IN Level Setting

Select the level of aux input from +3, 0, or -6 by pressing the FB key. Multi control knob is available for same setting after mode key is pressed.

5-1-4 Noise Blanker Setting

Select the level of NB from NB1,NB2 or NB OFF by pressing the SKIP DOWN key.

5-1-5 BASS/TREBLE setting

Select the level of tone from tone max, tone flat or tone min by pressing the BAND key. Display shows as follows.

display A display B

tone max. BASS/TER## #######MAX +8 +8 tone min. BASS/TER## #######MIN -8 -8 tone flat BASS/TER## ####CENTER 0 0

Multi control knob is available for same setting after mode key is pressed.

#=space

bass treble

value value

CIRCUIT DESCRIPTION

RD-VH7

5-1-6 Balance Setting

Select the level of balance from L-ch, max, R-ch max or center by pressing the MODE key. Multi control knob is available for same setting after mode key is pressed.

5-2 TUNER

Setting: Insert the power cord to the wall outlet with pressing the BAND key. Cancel: Press any key of operation. A part E of display shows RADIO T. "standby" LED lights orange and green color alternately in this test mode.

5-2-1 Dimmer Setting

Dimmer is available in LED and all segments of display lighting Select the on/off of dimmer from dimmer on or dimmer off by pressing the CD/PLAY/PAUSE key. Dimmer is set to OFF if cancel test mode.

5-2-2 P.CALL Setting

Select the step of p.call from 10,20, --- 40 or 01(10steps) by pressing the MODE key.

5-2-3 P. CALL Up/Down Setting

This setting is available by P.CALL UP/DOWN key.

5-2-4 Normal Mode (AUX/TUNER)

This setting is available by pressing MODE key for 1.5 secs . CD eject works except tuner mode.

5-3 Sub Clock Oscillation Check

Setting: Insert the power cord to the wall outlet with pressing the INPUT key. Cancel: Press any key of operation. However continue tuner test mode. Display lights if oscillation and period are ok. Display shows ERR1(oscillation) or ERR2(period) and stop to check after 5 time checks.

5-4 CD

Setting: Insert the power cord to the wall outlet with pressing the PLAY key. Cancel: Press any key of operation. However a part B of display is only cancel. A part A of display shows mechanism sensors. Disc loading sensor/8cm sensor/12cm sensor/down switch in order. Display shows "-" at first time. A part B of display shows CD-TEST LED is blanking.

5-4-1 Mechanism Sensor Check

Display shows from "-" to "0" or "x" after loading the disc. "0" means sensor works. "x" not works.

5-4-2 Adjusting

key description

CD PLAY/ tracking servo on/off PAUSE display B shows 05✽✽:✽✽ if servo on

display B shows 03--:-- if servo off

skip up horizontal or vertical position choice

display B shows 05V✽✽:✽✽ in horizontal mode (servo gain and tracking bias)

5-4-3 Pickup Movement

key description

FF pickup travels outwards and display B

shows OUTSIDE.

FB pickup travels inwards and display B

shows INSIDE.

5-4-4 Initialization in Test Mode

CD stop to playback. Display B shows 0100:00

5-5 Factory Test Check

5-5-1 Initial Operation

Setting: Insert the power cord to the wall outlet with pressing the AUTO/MONO key. Cancel: Turn power off.

1. Check sub clock oscillation. Display lights for 2 secs. If no problem.

2. Display A shows destination.

3. Display A shows sensor's condition with H or L after any key is pressed.

5-5-2 Display Check

Display's dots light on or off by pressing MODE key. Back light is always on.

5-5-3 Slot Check

key description

FF slot in operation. Display B shows LOAD FB slot out operation. Display B shows UNLOAD.

6. Initialization

Setting: Insert the power cord to the wall outlet with pressing the STOP key. Initialize amplifier section(preset,time reset and RAM) after CD mechanism initialization. Turn unit to standby mode. Display shows INITIALIZE for check time. Display shows CD EER if any trouble.

7. Cancel of Test Mode

Initialized and cancel test mode if pulling out power cord. Not initialized and cancel test mode if the power switch turns off. Turn normal mode if pressing STOP key in stop condition of CD test mode.

8. Common Operation in Test Mode

1. Volume level is 40 at every test mode start up.

2. No muting with switching test mode. But muting-on if power switch on/off.

3. AUX test mode is available for selecting MD,TAPE, or AUX

4. Initialize setting value or condition if pull out the power cord.

5. AUX IN LEVEL is initialized to +3(0dB).

6. Input key is available for switching test mode item,tuner,cd, MD, tape and aux.

RD-VH7

CD ASP LA9241M

CD MECHA. CDM-34

TUNER UNIT (RDS DECODER) E/T ONLY

RELAY (PWER, SP, HP)

DISPLAY u-COM HD6433297A17F

SL16

LCD DRIVER SED1565

LCD

REM BACK UP

FAN BIAS

MUTING PROTECTION REC OUT SEL LED KEY

CD DSP LC78628E

SYSTEM IC LC75396NE

X09, IC400 X09, IC401 X09, IC2

X09, IC4

X09, IC5

M30622MC-570FP

ENCODER AUDIO LEVEL DESTINATION TILT SENSOR

HEADPHONES DETECTOR

VOLTAGE

0.000

1.061

1.726

2.437

3.156

3.827

4.586

KEY1

89PIN

MODE POWER KEY

OFF

KEY2

90PIN STOP

SKIP DOWN

PLAY/PAUSE INPUT BAND KEY

OFF

KEY3

91PIN

SKIP UP EJECT

TUNING UP

TUNING DOWN

AUTO/MONO KEY

OFF

CIRCUIT DESCRIPTION

9. Common Operation in AUX/TUNER Test

9-2 FAN Operation

Mode

9-1 Bias and Main Volume Level

Set unit to aux or tuner test mode. Select the proper value with CD PLAY/PAUSE or CD STOP key.

volume bias display D

0 pure A low PURE#A#L

1 pure A low PURE#A#L 20 pure A mid PURE#A#M 40 pure A high PURE#A#H 80 pure B low PURE#B#L

Multi control knob is available for same setting after mode key is pressed.

10. MICROPROCESSOR ; M30622MC-570FP(X09,IC4)

10-1 MICROPROCESSOR PERIPHERY BLOCK DIAGRAM

Display C shows fan condition.

FAN Display C

off FAN#OFF#

low FAN#low#

high FAN#Hi##

KEY MATRIX

* REFERENCE VOLTAGE: 5.0V

CIRCUIT DESCRIPTION

10-2 MICROPROCESSOR PIN DESCRIPTION

Pin No. Pin Name I/O Descriptin

1 RELAY HP O Headphones relay control terminal. 2 RELAY SP O Speaker relay control. 3 DISP_RST O Reset for communication between display u-COM and u-COM(IC4). 4 DISP CE O Chip enable for communication between display u-COM and u-COM(IC4). 5 DISP OUT O Data out for communication between display u-COM and u-COM(IC4). 6 DISP IN I Data In for communication between display u-COM and u-COM(IC4). 7 DISP CLK O Clock for communication between display u-COM and u-COM(IC4). 8 BYTE I Connected to ground.

9 CNVSS I Connected to ground. 10 XCIN I Clock (32.768kHz). 11 XCOUT O Clock (32.768kHz). 12 RESET I Reset terminal of microprocessor. 13 XOUT O Main clock. 14 VSS - Ground. 15 XIN I Main clock. 16 VCC - Power supply(+5V). 17 NMI I Connected to power supply(+5V). 18 REMOCON I Remocon signal Input. 19 DQSY I Text data reading permission signal Input. 20 WRQ I Q code reading permission signal Input. 21 NC O Unused. 22 DIMMER O LCD back light dimmer. 23 COIN O Output terminal of u-COM data. 24 TGL I Change-over for tracking gain. 25 NC O Unused. 26 FSEQ I EMF synchronism signal Input. 27 NC O Unused. 28 CQCK O Clock output. 29 SQOUT I Sub code Q Input.

30,31 NC O Unused.

32 SRDT I Text data Input. 33 SCLK O Clock for text data. 34 SDA O Unused. 35 SCL O Unused.

36,37 NC O Unused.

38 CD_RST O Reset signal output. 39 DRF I Focus OK signal Input. 40 RWC O Read/write control output. 41 SL- O Moves the sled slightly toward the Inner position of disc. 42 SL+ O Moves the sled slightly toward the outer position of disc. 43 LOADING O Change-over for mechanism loading(+/-). 44 LOAD MUTE O Change-over for mechanism loading(ON/OFF). 45 NC O Unused. 46 LOAD_SW I Detection terminal for disc.

47,48 NC O Unused.

49 12DISC_SW I 12cm disc detection terminal. 50 DOWN_SW I Control port of down motor for mechanism.

RD-VH7

CIRCUIT DESCRIPTION

Pin No. Pin Name I/O Descriptin

51 BACK_UP I Detection port for backup mode. 52 NC O Unused.

53,54 ENC1/2 I Rotary encoder1/2 Input.

55 SL16 DATA I/O SL16 data input/output. 56 SL16 BUSY I/O SL16 busy input/output. 57 STBYLED O LED3 standby(red). 58 ON LED O LED2 standby(grn). 59 EJECTLED O LED1 (eject). 60 MD REC SEL O Control terminal for MD rec. 61 TAPE REC SEL O Control terminal for TAPE rec. 62 VCC - Power supply. 63 TILT SENS I Detection terminal of FL lenght and breadth conditions. 64 VSS - Ground. 65 NC O Unused. 66 A-MUTE O Audio muting control. 67 -10V CONT. O Control terminal for LCD power supplly(-10V). 68 BIAS HIGH O Bias control(HIGH). 69 BIAS MID O Bias control(MID).

70~72 DSW0~2 I Discrimination of model destination(SW0~2).

73 STEREO I Detection terminal of stereo signal for TUNER. 74 SD I Detection terminal of SD signal for TUNER. 75 RDS CLK I RDS clock Input.(E/T version only) 76 RDS DATA I RDS data Input.(E/T version only) 77 PLL DO I PLL IF count Input. 78 CE O Chip enable to LC75396(IC2) and LC72131(tuner pack IC2). 79 DATA O Data to LC75396(IC2) and LC72131(tuner pack IC2). 80 SCLK O Clock to LC75396(IC2) and LC72131(tuner pack IC2). 81 T_MUTE O TUNER muting control. 82 (EMPHASIS) O DE-EMPHASIS control. 83 CD ON/OFF O Unused. 84 NC O Unused. 85 FAN _H/L O Fan H/L change-over. 86 FAN ON/OFF O Fan ON/OFF control. 87 POWER RE O Power relay control. H = ON L = OFF 88 PROTECT I Detection terminal of protection. H =protection ON

89~91 KEY1~3 O Key A/D Input 1~3.

92,93 PT4,3 I Detection terminal of 8cm disc.

94 A LEVEL I Audio level Input(A/D). 95 RDS SLEVEL I RDS signal level Input(A/D). (E/T version only) 96 AVSS - A/D ground. 97 PROTECT TEMP I Detection terminalfor temperature compensating. 98 VREF - A/D reference voltage. 99 AVCC - A/D power supply(+5v).

100 HP_IN I Headphones detection terminal.

+ 22 hidden pages

Kenwood RDVH-7 Service manual

CONTENTS / ACCESSORIES

Contents

Accessories

System configuration

DISASSEMBLY FOR REPAIR

REMOVE CD MECHANISM

ELECTRIC CHECK

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

1. INITIAL SETTING

2. BACKED UP ITEMS

4. LCD INDICATION

5. How to Set the Test Modes

6. Initialization

7. Cancel of Test Mode

8. Common Operation in Test Mode

10. MICROPROCESSOR ; M30622MC-570FP(X09,IC4)