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Kenwood KRC-X838, Service Manual

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Kenwood KRC-X838 Service Manual Download Page 13

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PC BOARD (Component Side View)

ELECTRIC UNIT

Refer to the schematic diagram for the values of resistors and capacitors.

13

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ELECTRIC UNIT
(X25-923X-XX)

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5

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3

F

3

4

K

4

5

H

3

6

I

4

7

H

4

8

H

4

0

1

I

3

1

1

I

3

2

1

H

3

4

1

G

3

6

1

I

5

0

2

G

4

1

2

G

4

2

2

J

5

5

2

G

6

6

2

F

5

2

K

5

4

F

3

5

F

3

6

F

3

0

1

F

4

1

1

F

4

2

1

F

3

3

1

F

3

4

1

I

5

6

1

I

3

7

1

I

3

9

1

H

4

0

2

H

3

2

2

I

3

3

2

I

3

4

2

F

3

6

2

J

5

0

3

I

5

2

3

H

4

4

3

G

4

5

3

G

3

7

4

I

6

8

4

I

6

1

5

J

6

2

5

G

2

1

0

1

H

6

6

7

4

K

5

2

0

6

F

3

3

0

6

F

3

5

0

6

F

3

X25-923X-XX (J74-1330-22)

C6

C16

C17

1

3

34

45

48

50

C18

C19

1

2

4

3

EQ

SA

4

6

5

RST

AT

T

SRC

FM

AM

DISP

TI

3

2

1

IC3

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

S13

S14

S15

S16

S17

S18

S19

S20

ED1

S-METER

NOISE

CLK

DATA

L

IFC-OUT

TEST

GND

RST

BU5

Lch

Rch

C9

C1

C11

C13

C15

C22

C23

C24

C29

C33

C32

C40

C49

C60

C63

C8

C114

C115

C116

C142

C143

C920

C6

C5

C3

C609

C606

L7

R45

C34

C36

C627

C61

C57

C76

C67

C68

C69

C77

C56

C79

C78

C82

C81

C85

C86

C94

C93

C96

C95

C100

C99

C101

C102

C106

C105

C107

C108

C117

C118

C119

C120

C129

L1

L2

X3

C601

C608

C607

C47

W9

C62

C46

C51

C58

C59

C50

C52

C53

R811

CP7

C130

C26

C28

C37

C43

C42

W14

C16

C144

C863

R7

R11

R14

R28

W10

R24

R37

R38

R43

R162

R161

R172

R171

R182

R181

R242

R303

X1

C7

C27

C25

C141

L14

R6

R8

R10

R13

R15

R19

R27

C30

R31

R30

C31

R32

R41

R42

R48

R50

R55

R114

R152

R178

R168

R167

R177

R188

R187

R230

R231

R814

R810

C620

C132

C80

CP1

C855

R1

R815

C862

W100

R817

C813

C814

C812

C801

R608

L6

VR1

R604

R75

R69

R66

CP3

R58

R808

R813

CP6

R91

R92

R81

R87

R85

CP9

R18

R9

X2

CP2

CP5

C45

C54

R33

CP8

R103

C136

C134

R140

R144

R143

R607

C19

R127

R812

W7

W8

R803

R802

R801

R203

CP4

R624

C624

C623

R606

R623

R622

R605

C622

R621

R80

R625

C203

VR2

1

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8

1

16

9

22

12

11

1

44

34

33

23

15

14

28

1

4

5

8

1

4

5

8

1

4

5

8

1

4

5

8

1

7

8

14

1

4

5

8

1

7

1

4

5

8

8

14

10

1

30

21

31

40

11

20

31

50

30

1

100

81

80

51

1

2

3

4

1

13

14

25

8

5

4

1

1

11

12

1

1

3

2

8

E

1

2

19

20

B

EB

EB

EB

B E

EB

EB

EB

E

B

E

B

EB

EB

E

B

E

B

E

B

EB

EB

EB

E

B

E

B

E

B

E

B

1

3

1

24

EB

B

E

E

B

E

B

E

B

E

B

G

R

C64

2

1

25

24

1

1

6

3

1

5

1

E

B

5

2
4

B

E

10

2

9

1

8

1

9

2

1

16

A1

CN2

CN8

CN6

CN5

D1

D6

D9

D10

D22

D23

D24

J1

S1

CN3

CN4

CN7

D15

D16

D17

P1

Q4

Q10

Q16

Q26

CN9

Q476

IC4

D25

D801

Q602

Q24

CN1

CN10

D51

D62

D61

D60

D802

D803

D804

D59

D58

D57

D56

D55

D54

D53

D52

IC25

IC22

D5

D8

D13

D34

D33

D35

D36

D39

D40

D63

IC1

IC2

IC3

F/E

IC5

IC6

IC7

IC8

IC14

IC16

IC20

IC21

Q5

Q12

Q30

Q35

D14

D20

D101

D2

IC10

IC11

IC12

Q6

Q11

Q13

Q14

Q20

Q19

Q23

Q22

Q17

Q32

Q52

Q101

Q48 Q47

Q2

D601

Q605

Q51

D805

IC26

Q603

D603

D11

Q34

D21

D7

SWITCH UNIT
(X16-1682-71)

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X16-1682-71 (J74-1327-22)

SWITCH UNIT

w w w . x i a o y u 1 6 3 . c o m

Q Q 3 7 6 3 1 5 1 5 0

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9

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2

9

8

T E L

1 3 9 4 2 2 9 6 5 1 3

9

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0

5

1

5

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Q

Q

TEL  13942296513  QQ  376315150  892498299 

TEL  13942296513  QQ  376315150  892498299 

Summary of Contents for KRC-X838

Page 1: ...anel assy A64 2653 11 KRC Z965 Front glass B10 4215 01 Panel assy A64 2652 11 X838 Antenna adaptor T90 0523 0534 0552 05 Screw set N99 1723 05 KRC Z965 Screw set N99 1656 05 Lever D10 4674 04 x2 Mounting hardware assy J21 9823 03 Plastic cabinet assy A02 2712 13 Remote controller assy A70 2026 05 Escutcheon B07 3050 02 DC cord E30 6063 05 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 1394229...

Page 2: ...1 8V PRE 4469mV 1254mV 1781mV 2041mV 4 5V PRE SUB M SUB M 251mV 215mV 1200mV AUX 1200mV TAPE 388mV CH F E FM B PLL B AM B BUFF E VOL MI COM DECODER RDS ISO AMP OEM EJECT LED DSI DISP 4 5V PRE DC DC 2WAY MUTE ACC DET DIMMER TEL MUTE ACC DIMMER POWER IC PRE AMP PRE OUT SP OUT MUTE DRIVER NOISE BUFFER P CON P CON IF B CASSETTE MECHA EQ DOLBY AUX SW OP AMP E S SPEANA AGC OP AMP MUTE 4 5V BU DET BACK U...

Page 3: ... Amplifier for the spectrum analyser and generation of Vref 1 2Vcc voltage IC10 NJM4565M TE2 Op amp Amplifier for the front pre outputs IC11 NJM4565M TE2 Op amp Amplifier for the non fader pre outputs IC12 NJM4565M TE2 Op amp Amplifier for the rear pre outputs IC14 TDA7479D RDS decoder IC16 S 80837ANNP Reset IC When BU 5V voltage is less than 3 7V IC outputs Lo IC20 BA3121F Isolation amplifier AUX...

Page 4: ...ting Q39 DTC143TUA or UN5216 Audio mute SW Non Fader L When Q39 s base goes Hi Pre output is muting Q40 DTC143TUA or UN5216 Audio mute SW Non Fader R When Q40 s base goes Hi Pre output is muting Q41 DTC143TUA or UN5216 Audio mute SW Rear R When Q41 s base goes Hi Pre output is muting Q42 DTC143TUA or UN5216 Audio mute SW Rear L When Q42 s base goes Hi Pre output is muting Q43 DTC124EUA or UN5212 F...

Page 5: ...Reset release 35 XT1 Sub clock resonator connection terminal Not used Pull down to GND lines 36 XT2 Sub clock resonator connection terminal Not used N C 37 REGC Capacitor connection terminal for regulator inside microprocessor 38 X2 Main clock resonator connection terminal 39 X1 Main clock resonator connection terminal 40 VSS Ground connection terminal Connected to GND lines 41 VDD Positive power ...

Page 6: ...tput with IC2 IC5 and IC25 8 IC2 SCL I O Clock input output with IC2 IC5 and IC25 9 EVDD Positive power supply connection terminal Connected to BU 5V lines 10 EVSS Ground connection terminal Connected to GND lines 11 PAN RESET O Reset output to the panel MI COM Lo Reset or Momentary power down detected 12 BEEP O BEEP output 13 REMO I Data input from the wired remote control 14 SVR O SVR output Not...

Page 7: ...PE0 I IC2 setting terminal 0 Lo Initial value Default 56 IC2TYPE1 I IC2 setting terminal 1 Lo Initial value Default 57 P ON I O SW14V control output Hi Z POWER OFF mode Hi POWER ON mode 58 BVDD Positive power supply connection terminal Connected to BU 5V lines 59 BVSS Ground connection terminal Connected to GND lines 60 TYPE I Destination type setting terminal Lo E type Hi M type 61 E2PDET I EEPRO...

Page 8: ...RDS decoder IC Except RDS model Not used Pull down to GND lines 94 CH REQC I Communication request input from changers Lo Request 95 EJECT I EJECT key detection input Lo When EJECT key is pressed 96 SC REQ I Communication request input from the panel MI COM Hi Request 97 CH DATAC I Data input from changers 98 CH DATAH O Data output to changers 99 CH CLK I O Clock input output with changers 100 SC ...

Page 9: ...t 1 and Preset 3 keys reset the unit 2 How to exit from the test mode Reset the unit ACC OFF power OFF and Panel detached Note The test mode cannot be terminated by momentary power down 3 Initial status in the test mode Sources ALL OFF Display All segments are lit Volume 10 dB displayed as 30 Loudness OFF CRSC OFF regardless of the presence of switching function SYSTEM Q Flat BEEP When pressing an...

Page 10: ... security code after EEPROM Tuner Unit Ass y replacement Code security model 1 Enter the test mode See 1 How to enter the test mode 2 Press the PLAY PAUSE key to enter the Menu mode 3 When the message Security is displayed press and hold the Track Up Down key for 1 second to enter the security registration mode 4 Enter the code using the FM AM Track Up Track Down keys FM key Number up AM key Numbe...

Page 11: ...VR2 R 388mV a LEVEL CN10 X25 6dBm ADJUSTMENT Set the controls and switches as follows BALANCE center position BASS center position LOUD OFF DOLBY NR OFF FADER center position TREBLE center position FWD REV VR1 Lch VR2 Rch AC Voltmeter a 388mV L G R CN10 F E X25 b AZIMUTH CASSETTE MECHANISM CASSETTE DECK SECTION 11 KRC Z965 X838 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 ...

Page 12: ...de View 12 DAUGHTER UNIT X89 2532 71 J74 1332 12 1 19 20 2 CN1 DAUGHTER UNIT X89 2532 71 J74 1332 12 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 15 1 2 16 S1 J1 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 ...

Page 13: ...2 R41 R42 R48 R50 R55 R114 R152 R178 R168 R167 R177 R188 R187 R230 R231 R814 R810 C620 C132 C80 CP1 C855 R1 R815 C862 W100 R817 C813 C814 C812 C801 R608 L6 VR1 R604 R75 R69 R66 CP3 R58 R808 R813 CP6 R91 R92 R81 R87 R85 CP9 R18 R9 X2 CP2 CP5 C45 C54 R33 CP8 R103 C136 C134 R140 R144 R143 R607 C19 R127 R812 W7 W8 R803 R802 R801 R203 CP4 R624 C624 C623 R606 R623 R622 R605 C622 R621 R80 R625 C203 VR2 1...

Page 14: ... Q8 Q21 Q18 Q27 Q28 Q36 Q44 Q46 D28 D29 D27 D602 D12 Q103 D18 D4 D19 D3 SWITCH UNIT X16 1682 71 O N f e R s s e r d d A C I Q 1 O 5 2 O 5 4 O 5 5 O 4 1 O 6 2 O 6 3 O 5 4 O 4 6 O 6 7 O 6 8 O 6 9 O 6 0 1 O 6 Refer to the schematic diagram for the values of resistors and capacitors 15 16 PC BOARD Foil Side View ELECTRIC UNIT X25 923X XX O N f e R s s e r d d A C I Q 3 S 5 7 U 3 8 U 3 5 1 R 5 8 1 R 4 ...

Page 15: ... 95 94 96 100 97 98 99 91 89 88 81 80 R88 2 2K C45 1000P R86 2 2K R84 1K 4 7Kx2 CP5 72 71 70 R69 470 R810 100K R64 100K R63 100K R59 100K R56 100K 1Kx2 CP1 100Kx2 52 51 53 54 CP14 1Kx2 CP3 67 66 69 68 0 1 C620 78 79 77 64 CP12 100x2 CP2 1Kx2 32 7680kHz 20 000MHz X1 22K R18 C44 1 X2 R807 100 0 01 C852 1K R35 CP4 4 7Kx2 R50 1K 24P C42 C43 24P 48 49 50 45 33 32 31 C19 0 1 47K R9 47u6 3 C40 0 01 C41 4...

Page 16: ...0u16 A OUT 1 C103 2200P R180 82 W10 C99 470 R171 22K 5 6 R178 10u16 C101 7 8 82 R179 22u16 22u16 470 R181 R182 470 R186 R184 2 2K R183 2 2K 10K R185 10K R190 C108 R188 22K R187 10u16 C107 B OUT B IN B IN A IN V 4 A IN 2 3 5 6 A OUT 1 8 7 V R189 82 C109 C110 2200P 2200P 22K 10u16 82 C105 C106 PFL PFR PRR PRL PNR PNL W5 W6 0 022 C30 56K R27 47 R29 7 5K R26 47 R25 2 7K R24 2 2 C27 2 2 C28 22u16 C29 4...

Page 17: ...V 3 3V S20 S11 S4 S14 Q6 Q3 Q4 Q2 Q1 Q8 Q7 Q9 Q10 D10 D11 S1 TAR5S33 RS 171 IC4 IC1 IC2 TC74HC4050AFT BA3830F IC3 DA204U D1 2 15 16 IC5 D10 11 MA8056 M UPD703032GFA04 D3 5 9 13 14 FTZ6 8E DTA144EUA or Q1 D12 Q3 9 10 DTC114YUA or MA8062 L Q2 DTA114EUA or DTC114YK or Q6 Q4 2SC4081 DTC114EUA or Q7 8 J1 D2 D12 3 6 FM 2 5 1 4 SA EQ TI AM ATT DISP SRC RESET D1 X16 168X XX A B LINE GND LINE SIGNAL LINE 3...

Page 18: ... N19 2139 08 f2x2 5 WASHER M2x13 f2x3 M2x3 WASHER WASHER WASHER WASHER WASHER 58 56 57 52 53 54 CM1 CM2 25 76 21 24 45 23 65 65 66 66 67 67 10 11 1 31 30 9 9 HD1 17 15 4 22 12 12 20 5 6 7 26 48 48 49 27 94 91 93 92 95 94 891 D N G H C C F B E E E E B G H N D Ax2 Ax2 K J J www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 3763...

Page 19: ...x2 213 260 280 RC1 X16 1682 71 250 268 X89 2532 71 D Bx2 B 253 251 223 226 222 221 786 785 205 763 740 L 762 225 249 CL1 227 755 224 227 261 229 252 E 754 X25 G G G F F K F 701 743 738 795 X25 798 796 X25 792 X25 K K K 739 234 N F1 X25 923X XX K 739 739 W9 X25 793 X25 797 X25 232 233 K 245x2 245x2 K 235 245x2 Ax2 Ax2 245x2 764 Kx2 744 794 X25 Fx2 Fx3 Kx2 741 277 276 708 203 215 214 273 270 272 274...

Page 20: ... FIXTURE H25 0329 04 PROTECTION BAG 280X450X0 03 M1 H25 0337 04 PROTECTION BAG 180X300X0 03 H25 1111 04 PROTECTION BAG 280X450X0 03 E H54 2326 03 ITEM CARTON CASE M1 H54 2327 03 ITEM CARTON CASE E 260 1C J21 9823 03 MOUNTING HARDWARE ASSY 261 3C J21 9831 04 MOUNTING HARDWARE ASSY 268 2C K24 3837 04 KNOB OPEN 270 2C K24 3850 04 KNOB SKIP UP 271 2C K24 3851 04 KNOB SKIP DOWN 272 2C K25 1417 13 KNOB ...

Page 21: ...GUE IC IC2 TC74HC4050AFT MOS IC IC3 RS 171 ANALOGUE IC IC4 BA3830F ANALOGUE IC IC5 UPD703032GFA04 MI COM IC Q1 DTA144EUA DIGITAL TRANSISTOR SWITCH UNIT X16 1682 71 Q1 UN5113 DIGITAL TRANSISTOR Q2 DTC114YUA DIGITAL TRANSISTOR Q2 UN5214 DIGITAL TRANSISTOR Q3 DTA114EUA DIGITAL TRANSISTOR Q3 UN5111 DIGITAL TRANSISTOR Q4 DTC114EUA DIGITAL TRANSISTOR Q4 UN5211 DIGITAL TRANSISTOR Q6 DTC114YK DIGITAL TRAN...

Page 22: ...103K CHIP C 0 010UF K C141 CC73GCH1H331J CHIP C 330PF J C142 143 C90 5435 05 ELECTRO 10UF 10WV C144 CK73GB1H103K CHIP C 0 010UF K C145 146 CC73GCH1H100D CHIP C 10PF D C201 202 CK73GB1H332K CHIP C 3300PF K M1 C203 CK73GB1H104K CHIP C 0 10UF K C204 CK73GB1H103K CHIP C 0 010UF K C205 206 CK73GB1H104K CHIP C 0 10UF K M1 C601 C90 5435 05 ELECTRO 10UF 10WV C602 605 CC73GCH1H471J CHIP C 470PF J C606 608 ...

Page 23: ...4 RK73GB2A104J CHIP R 100K J 1 10W R55 RK73GB2A472J CHIP R 4 7K J 1 10W R56 RK73GB2A104J CHIP R 100K J 1 10W R58 RK73GB2A103J CHIP R 10K J 1 10W R59 RK73GB2A104J CHIP R 100K J 1 10W R61 RK73GB2A223J CHIP R 22K J 1 10W R63 RK73GB2A104J CHIP R 100K J 1 10W E R64 RK73GB2A104J CHIP R 100K J 1 10W M1 R65 RK73GB2A473J CHIP R 47K J 1 10W R66 RK73GB2A102J CHIP R 1 0K J 1 10W R67 RK73GB2A472J CHIP R 4 7K J...

Page 24: ... R 20K J 1 10W R616 619 RK73GB2A243J CHIP R 24K J 1 10W R620 RK73GB2A333J CHIP R 33K J 1 10W R621 RK73GB2A473J CHIP R 47K J 1 10W R622 626 RK73GB2A104J CHIP R 100K J 1 10W R627 RK73GB2A473J CHIP R 47K J 1 10W M1 R628 631 RK73EB2E5R6J CHIP R 5 6 J 1 4W R632 RK73GB2A102J CHIP R 1 0K J 1 10W R801 RK73EB2E102J CHIP R 1 0K J 1 4W E R802 804 RK73EB2E471J CHIP R 470 J 1 4W E R807 RK73GB2A101J CHIP R 100 ...

Page 25: ...TRANSISTOR Q35 DTC124EUA DIGITAL TRANSISTOR Q35 UN5212 DIGITAL TRANSISTOR Q36 40 DTC143TUA DIGITAL TRANSISTOR E Q36 40 UN5216 DIGITAL TRANSISTOR E Q36 42 DTC143TUA DIGITAL TRANSISTOR M1 Q36 42 UN5216 DIGITAL TRANSISTOR M1 Q43 DTC124EUA DIGITAL TRANSISTOR Q43 UN5212 DIGITAL TRANSISTOR Q44 CPH3105 TRANSISTOR Q45 DTC124EUA DIGITAL TRANSISTOR Q45 UN5212 DIGITAL TRANSISTOR Q46 CPH3105 TRANSISTOR Q47 48...

Page 26: ...8 SLIDER 65 2A B09 0522 08 CAP 66 2A G01 2963 08 COMPRESSION COIL SPRING 67 2A D03 0314 08 REEL DISK ASSY 76 2A J19 5025 08 CORD CLAMPER 91 3A J26 4043 08 PRINTED WIRING BOARD ASSY 92 3A E39 0424 08 FLAT CABLE 93 3A J69 0511 08 ADHESIVE DOUBLE COATED TAPE 94 2A T95 0245 08 PHOTO COUPLER 95 2A E39 0425 08 LEAD WIRE A 3A N09 4324 08 MACHINE SCREW B 2A N19 2136 08 FLAT WASHER C 2B N09 4325 08 MACHINE...

Page 27: ...t Consumption 10A Installation Size W x H x D 180mm x 50mm x 159mm Weight 1 4kg KENWOOD follows a policy of continuous advancements in development For this reason specifications may be changed without notice Manufactured under license from Dolby Laboratories Dolby and the double D symbol are trademarks of Dolby Laboratories KENWOOD ELECTRONICS ITALIA S p A Via G Sirtori 7 9 20129 Milano Italy KENW...

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