KENWOOD KRC-578R Service Manual

EJECT

PWR OFF

LOUD

VOL ADJ

DISP NAME.S

SCAN B.S/RDM REP

D.SCN

M.RDM

DISC

PROG/PTY

DAB

AUD

KRC-578R

45W 4

EJECT

PWR OFF

LOUD

VOL ADJ

DISP NAME.S

SCAN B.S/RDM REP

D.SCN

DISC

PROG/PTY

DAB

AUD

B NR

MTL/M.RDM

KRC-680R

45W 4

KRC-578R/RY KRC-680R

CASSETTE RECEIVER

SERVICE MANUAL

2000-3 PRINTED IN KOREA

B51-7598-00 ( K ) 2202

Front glass assy (B10-3206-08)

Escutcheon assy (B07-2195-08)

Panel assy (A64-2087-08)

Lever (D10-4514-08)

Mounting hardware assy (J21-9585-08)

DC cord assy (E30-4862-08) : KRC-680R only

Plastic cabinet assy (A02-1494-08)

The CASSETTE MECHANISM OPERATION DESCRIPTION is the same model D40-1122-05. Please refer to the service manual for model D40-1122-05(B51-7452-00).

Stay (J54-0611-08) : KRC-680R only

Escutcheon (B07-2186-08) : KRC-680R only

Screw set (N99-1689-08) : KRC-680R only

Screw set (N99-1688-08)

KRC-680R

KRC-578R

Panel assy (A64-2087-08)

Front glass assy (B10-3207-08)

Escutcheon assy (B07-2195-08)

DC cord assy (E30-4863-08) : KRC-578R/RY

ANT adapter (T90-0523-05) : KRC-578R/RY

Remote controller assy (A70-0883-05) : KRC-680R only

Size AAA battary (Not supplied) : KRC-680R only

40%

TUNER

ANT

SGS-IC

E PROM

E-VOL

TDA7400D

NOISE AMP

POWER IC TDA7386

EQ-AMP

UPD784217AGF503

u-COM

CD-CH

RST

LCD-Dr

LC75883E

REMO

KEY MATRIX

LCD

BU 5V

SW 5V

PNL 5V

AUDIO 8V SW 14V

MOTOR 14V

ILL 11V

BU 14V

TDA7479D

RDS DETECTOR

SERVO 14V

CXA2560Q MS. B/NR

CXA2559Q

MOTOR-Dr

BA6219BFP-Y

(D40-1141-08)

CASSETTE MECHA

TU100

IC200

IC300

IC150

IC1

IC250

IC500

Q610

Q621

Q616

Q612

Q618

Q622

IC900

REAR

FRONT

REAR

FRONT

BU 5V

SW 5V

PNL 5V

SERVO 14V

MOTOR 14V

ILL 11V

CASS

CD-CH

FRONT

10K

REAR

FRONT

REAR

AIDIO 8V

KRC-680R/578R/RY

USED

KRC-680R/578R/RY/508S/688

KRC-680R KRC-508S

KRC-578R/RY

KRC-688

E: KRC-578R/RY

KRC-508SK: KRC-680R/688M:

CASS

AM(E)

AM(K,M)

FM(E)

FM(K,M)

CD-CH

310mV

(E)

(K,M)

(E)

(K,M)

1200mV

FM(K,M)

CASS

FM(E)

CD-CH

FM(K,M)

CASS

FM(E) AM(K,M) AM(E)

CD-CH

FRONT

REAR

CD-CH

CASS

AM(E)

AM(K,M)

FM(E)

FM(K,M)

: 730mV

: 560mV

: 1280mV

: 1660mV

: 2900mV

: 1490mV

: 400Hz 40KHz Dev

: 400Hz 75KHz Dev

: 1KHz 0dB

: 400Hz 30% Mod : 1KHz 0dB

: 1370mV

: 670mV

: 1180mV

: 2650mV

: 510mV

: 1530mV

: 1370mV

: 1180mV : 670mV

: 1530mV : 510mV

: 170mV

: 350mV

: 150mV : 140mV

: 2900mV

: 1660mV : 1280mV : 560mV

: 1490mV

: 730mV

AM(K,M) CASS

AM(E) CD-CH

FM(E)

FM(K,M)

KRC-578R/RY,680R

BLOCK DIAGRAM

KRC-578R/RY,680R

MICROCOMPUTER'S TERMINAL DESCRIPTION

784217AGF503(504)(IC1 : MAIN UNIT)

Pin Pin Name Signal Name I/O Purpose Operation Description

1 P60/A16 ST_TYPE1 I E-VOL setting selection input DEFAULT:LO 2 P61/A17 ST_TYPE2 I E-VOL setting selection input DEFAULT:LO

3 P62/A18 JS_TYPE1 I 4 P63/A19 TYPE1 I Destination type switching input 1

5 P64/RD TYPE2 I Destination type switching input 2 6 P65/WR TYPE3 I Destination type switching input 3 7 P66/WAIT NC O Not used 8 P67/ASTB NC O Not used 9 Vdd - Positive power supply pin

10 P100/TI5/TO5 AMP_SVR O Power IC reset control Power ON: Lo. 11 P101/TI6/TO6 AMP_STBY O Power IC standby control 12 P102/TI7/TO7 AMP_MUTE O Power IC muting control Muting ON: Lo. Muting OFF: Hi.

13 P103/TI8/TO8 NC O Not used 14 P30/TO0 ACC_DET I Acc detection input ACC OFF:HI ACC ON:LO 15 P31/TO1 BU_DET I B-U detection input B-U down: Hi. B-U normal: Lo. 16 P32/TO2 SMALL I Small input Dimmer ON: Lo. Dimmer OFF: Hi. 17 P33/TI1 P_CONT O Power control ON:HI OFF:LO 18 P34/TI2 P_ANT O Power antenna control TUNER: Hi. Other sources: Lo. 19 P35/TI00 REMO I Remote control input 20 P36/TI01 P_ON O Internal power control ON:HI OFF:LO 21 P37 ILL_ON O LED lighting control output Lighting ON: Hi. Lighting OFF: Lo. 22 TEST - IC test pin 23 P90 IC2_SDA I/O E-VOL/E's + data input/output 24 P91 IC2_SCK O E-VOL/E' + clock output 25 P92 MUTE O Muting control Muting ON: Hi. Muting OFF: Lo. 26 P93 SW5V O SW 5 V control ON:LO OFF:HI 27 P94 F/E_DATA I/O IC3 data input/output 28 P95 F/E CLK O IC 3 clock output 29 P120/RTP0 CH_CON O CH control ON:HI 30 P121/RTP1 CH_REQH O CH send request output Requested: Lo. 31 P122/RTP2 NC O Not used 32 P123/RTP3 NC O Not used 33 P124/RTP4 C-MAIN_M O C-mechanism main motor control ON:HI OFF:LO 34 P125/RTP5 C-SUB_M+ O C-mechanism loading motor control 35 P126/RTP6 C-SUB_M- O C-mechanism loading motor control 36 P127/RTP7 NC O Not used 37 Vdd - Positive power supply pin 38 X2 - Main system clock oscillator pin 39 X1 - Main system clock oscillator pin 40 Vss - GND pin 41 XT2 - Sub-system clock oscillator pin 42 XT1 - Sub-system clock oscillator pin 43 RESET I System reset input pin 44 P00/INTP0 NC O Not used 45 P01/INTP1 RDS_CLK I RDS clock input 46 P02/INTP2/NMI CH_REQC I CD-CH send request input Requested: Lo. 47 P03/INTP3 LCD_DATAL I Data input from LCD driver 48 P04/INTP4 C-MODE_1 I C-mechanism mode detection 1 input 49 P05/INTP5 C-MODE_2 I C-mechanism mode detection 1 input 50 P06/INTP6 C-MODE_3 I C-mechanism mode detection 1 input

Genuine/generally-marketed identification

input.

DEFAULT:LO

Standby canceled: Hi. Standby mode: Lo.

KRC-578R/RY,680R

MICROCOMPUTER'S TERMINAL DESCRIPTION

784217AGF503(504)(IC1 : MAIN UNIT)

Pin Pin Name Signal Name I/O Purpose Operation Description

51 AVdd - A/D analog power pin 52 AVref0 - A/D reference voltage input pin

53 P10/ANI0 PHONE I PHONE detection input 54 P11/ANI1 NC I Not used

55 P12/ANI2 NOISE I FM noise detection input 56 P13/ANI3 S-METER I FM S-meter input 57 P14/ANI4 NC I Not used 58 P15/ANI5 NC I Not used 59 P16/ANI6 REEL_S I C-mechanism supply reel detection 60 P17/ANI7 REEL_T I C-mechanism take-up reel detection 61 AVss - A/D and D/A GND pin 62 P130/ANO0 NC O Not used 63 P131/ANO1 NC O Not used 64 AVref1 - D/A reference voltage input pin 65 P70/RxD2/SI2 CH_DATAC I Data input from CD-CH 66 P71/TxD2/SO2 CH-DATAH O Data output to CD-CH 67 P72/ASCK2/SCK2 CH_CLK I/O CD-CH clock input/output 68 P20/RxD1/SI1 LCD_DATAL I Data input to LCD driver 69 P21/TxD1/SO1 LCD_DATAS O Data output from LCD driver 70 P22/ASCK1/SCK1 LCD_CLK O Clock output to LCD driver 71 P23/PCL NC O Not used 72 P24/BUZ BEEP O Beep output 73 P25/SI0 NC O Not used 74 P26/SO0 PNL_DET1 I Panel detection 75 P27/SCK0 NC O Not used 76 P80/A0 LCD_INH O Reset output to LCD driver 77 P81/A1 LCD_CE O CE output to LCD driver 78 P82/A2 SRT_SW1 I SRT position detection input 79 P83/A3 SRT_SW2 I SRT position detection input 80 P84/A4 NC O Not used 81 P85/A5 NC O Not used 82 P86/A6 NC O Not used 83 P87/A7 C-MSC O EQ amp FF/PLAY control PLAY:HI OFF:LO 84 P40/AD0 C-F/R O Tape transport direction switching FWD:LO REV:HI 85 P41/AD1 C-MUTE O Tape muting control MUTE:HI 86 P42/AD2 C-MS_IN I Inter-music pulse detection 87 P43/AD3 C-MTL O MTL ON/OFF control ON:HI OFF:LO 88 P44/AD4 C-NR O Dolby ON/OFF control ON:HI OFF:LO 89 P45/AD5 NC O Not used 90 P46/AD6 NC O Not used 91 P47/AD7 RDS_DATA I Data input from RDS decoder 92 P50/A8 RDS_QUAL I Quality input from RDS decoder

93 P51/A9 AFC O PLL high-speed lock-up pin 94 P52/A10 FM/AM_SD I FM/AM SD input Station detected: Hi.

95 P53/A11 IF_COUNT I Not used 96 P54/A12 NC O Not used 97 P55/A13 AM+B O AM power control ON:HI 98 P56/A14 FM+B O FM power control ON:HI 99 P57/A15 NC O Not used

100 Vss - GND pin

<1 V: PHONE. >

2.5 V: Navigation muting.

During reception: Hi. During search: Lo.

KRC-578R/RY,680R

TEST MODE

(1) How to enter the test mode

While holding the FM and Preset 6 keys simultaneously, reset the unit. All indicators and display segments are ON at the start of test mode.

(2) How to exit from the test mode

Reset the unit. (Note) The test mode cannot be canceled by turning Acc OFF, power OFF or momentary power down.

(3) (return to beginning)

Pressing the Track Down key jumps to the previous track to the track being played.

(4) Test mode specification of the tape

o The Blank Skip is initially OFF.

(5) Audio

o The volume is -10 dB (displayed as 30). o LOUD is OFF, and CRSC is also OFF whether the

function is provided or not.

o With the Bass/Treble and Balance/Fader controls,

pressing the Up/Down key switch the setting alternately to: Full Boost => Full Cut => Full Boost, Full Right -> Full Left => Full Right, or Full Front ~> Full Rear => Full Front.

o With the high-pass filter, pressing the Up key sets it to

Through/100 Hz/200 Hz and pressing the Down key sets it to 200 Hz/100 Hz/Through.

o Other adjustments function in the same way as normal

mode.

(6) Backup current measurement

When the unit is reset (backup turned on) while Acc is OFF or when Acc is turned OFF in test mode, the MUTE terminal goes on in 2 seconds, instead of 1.5 second. (The panel, CD, C and MD mechanisms are not activated at this time.)

Example: To enter "3510",

- Press the Preset 1 key 4 times.

- Press the Preset 2 key 6 times.

- Press the Preset 3 key 2 times.

- Press the Preset 4 key once.

7. Press and hold the DISPLAY key for 3 seconds to display "APPROVED".

8. Quit the test mode (See (2) How to exit from the test mode.)

(8) How to clear the simple security code (K type only)

1. While the code is requested, press and hold the DISP key and press and hold the VOL Up key for 3 seconds. ("----" disappears.)

2. Enter "KCAR" from the remote control unit. (Same operation as the '98 model)

- Press numeric key 5 twice then press the Track Up key. (This enters "K".)

- Press numeric key 2 three times then press the Track Up key. (This enters "A".)

- Press numeric key 2 once then press the Track Up key. (This enters "A".)

- Press numeric key 7 twice then press the Track Up key. (This enters "R".)

3. The security is canceled and the unit enters the TUNER mode.

(9) Other

o The DNPP/SBF key of the remote control unit (RC-510)

functions as the menu mode ON/OFF key.

o The OPEN/CLOSE key of the remote control unit (RC-

510) functions as the audio adjustment mode ON/OFF key.

o The menu is displayed by displaying only the required

features.

o Message such as "CODE OFF" is not displayed when

power is turned ON.

o The contrast can be adjusted only to 0/5/10 using the

Up/Down keys.

(7) Security code registration after E2PROM replacement

servicing (E/M type only)

1. Enter the test mode. (See (1) How to enter the test mode.)

2. Press the SRC key to set All OFF.

3. Press and hold the AUDIO key for 1 second to enter menu mode.

4. Press the FM/AM key to select "SECURITY".

5. Press and hold the Track Up/Down for 2 seconds.

6. Enter the code by pressing the Preset 1, 2, 3 and 4 keys.

tongue

Turn 4 times.

End of Roller ass’y

FPC

KRC-578R/RY,680R

No ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

TUNER

(RECEIVER)

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR FIG.

CASSETTE DECK SECTION

[1] AZIMUTH

TCC-153

10kHz

Connect a

AC voltmeter

to SP OUT

TAPE PLAY

Head Azimuth

Screw

Adjust the azimuth for each

Lch/Rch or FWD/RVS

becomes maximum

[2]

PLAY BACK

LEVEL

TCC-130

Connect a

AC voltmeter

to CN200

TAPE PLAY

VR200A (L) VR200B (R)

300mV (a)

F/E

CASSETTE MECHANISM

VR200B

VR200A

Rch

Lch

CN200

L G R

(a) 300mV

AC voltmeter

ADJUSTMENT

ATTENTION OF ASSEMBLY

Assembly of FPC(Flexible PC board) onto Roller ass'y Turn Roller ass'y by 4 times. Hook the end of Roller ass'y to the tongue. Insert the FPC into the slit of Roller ass'y then release the end of Roller ass'y and the tongue.

+ 13 hidden pages