Kenwood C-V751 Service Manual
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Kenwood C-V751 Service Manual

Kenwood C-V751 Service Manual

Stereo integrated amplifier/tuner
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STEREO INTEGRATED AMPLIFIER/TUNER
C-V751

SERVICE MANUAL

Indicator
Front glass
(B12-0311-04)
(B10-2350-14)
Knob
(K29-6665-02)
ON/STANDBY
TAPE 2
PHONES
INPUT
/ MONITOR
Phone jack
Knob
(E11-0280-05)
(K29-6665-02)
Metallic cabinet
Lock terminal board
(A01-3702-01)
(E70-0052-05)
AM
ANTENNA
FM 75Ω
GND
FRONT
L
CONNECT
WITH
POWER AMPLIFIER
R
Rectangular receptacle
Phono jack
(E58-0018-05)
(E63-1084-05)
Caution : No connection of ground line if disassemble the unit.
Please connect the ground line on rear panel, PCBs, Chassis and some
others.
TIMER
DIGITAL
SET UP
SOUND
INPUT MODE
SET
REC
RDS
TIMER
CLOCK
MODE
DISPLAY
PTY
TA/NEWS
Knob
(K29-6666-12)
Phono jack
(E63-0093-05)
Phono jack
(E63-0094-05)
VIDEO
REC
PLAY
PLAY
6CH.INPUT
PRE OUT
VIDEO 1
VIDEO 2
SURROUND CENTER
SUB WOOFER
REC
PLAY
PLAY
PLAY
Phono jack
(E63-0136-15)
© 1999-8/B51-5566-00 (K/K) 1992
LISTEN
CIRCLE
DIGITAL
DTS
MULTI.CONTROL
SURROUND
MODE
A.MEMO
AUTO
BAND
PTY SELECT
Knob
(K29-7591-02)
Optical receiving module
(W02-1181-05)
Phono jack
(E63-0199-05)
CD
DVD
(OPTICAL 1)
(COAXAL)
SYSTEM
CONTROL
DVD/
MONITOR
DIGITAL IN
DIGITAL IN
OUT
DVD/6CH.INPUT
CD
MD/TAPE1
TAPE 2/MON
FRONT
SURROUND CENTER
REC
PLAY
REC
PLAY
Phono jack(6P)x2
Phono jack
(E63-0139-15)
(E63-1084-05)
* Refer to parts list on page 33.
Front glass
Panel
(B10-2351-14)
(A60-1686-01)
LEVEL
TUNING
VOLUME CONTROL
OPEN/CLOSE
DOWN
Knob
Knob
(K29-6665-02)
(K29-6660-04)
Miniature phone jack
(E11-0293-05)
Power cord bushing
(J42-0083-05)
UNSWITCHED
SUB WOOFER
AC power cord *
(E30-)
UP
AC outlet *
(E03-)
70%

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  • Page 1: Service Manual

    STEREO INTEGRATED AMPLIFIER/TUNER C-V751 SERVICE MANUAL © 1999-8/B51-5566-00 (K/K) 1992 Indicator Front glass (B12-0311-04) (B10-2350-14) Front glass Panel (B10-2351-14) (A60-1686-01) Knob (K29-6665-02) LISTEN CIRCLE TIMER DIGITAL DIGITAL MULTI.CONTROL SURROUND MODE SET UP SOUND INPUT MODE LEVEL TIMER A.MEMO AUTO BAND...

  • Page 2: Table Of Contents

    C-V751 CONTENTS / ACCESSORIES Contents CONTENTS / ACCESSORIES ........2 SCHEMATIC DIAGRAM .......... 15 DISASSEMBLY FOR REPAIR........2 EXPLODED VIEW ............32 CIRCUIT DESCRIPTION ..........3 PARTS LIST..............33 ADJUSTMENT ............7 PARTS DESCRIPTIONS ..........39 WIRING DIAGRAM .............8 SPECIFICATIONS ........Back cover PC BOARD ..............9...

  • Page 3: Circuit Description

    C-V751 CIRCUIT DESCRIPTION 1. Conditions according to the destination • Sub-clock oscillation diagnosis function The oscillation diagnosis(existence oscillation and measurement of peri- TUNER destination table od) of a sub-clock is performed before the test mode is RECEIVING TUNER SW DESTIN-...
  • Page 4 C-V751 CIRCUIT DESCRIPTION 4. Microprocessor: CXP740010-107Q(X08,IC16) 4-1 Port description of microprocessor ACTIVE Pin No. Pin Name I/O Description AMUTE Audio muting control. Mute:ON Mute:OFF POWER Power ON/OFF relay control. Power:ON Power:OFF POWER Power amplifier relay control. Power:ON Power:OFF F RLY Front speaker relay control.
  • Page 5 C-V751 CIRCUIT DESCRIPTION ACTIVE Pin No. Pin Name I/O Description Detection port of error. ERROR Detection port of dolby digital. FREQ1 Detection port 1 of sampling frequency. FREQ0 Detection port 0 of sampling frequency. CODEC DIN Data input. ABQOT2 I/O ABOOT output/INTREQ input port.
  • Page 6 C-V751 CIRCUIT DESCRIPTION 5. FL driver: UPD16311(X14,IC1) 6-1-2 Audio selector IC(X11,IC5) S1 L/R S2 L/R S3 L/R S4 L/R S5 L/R S6 L/R S7 L/R S8 L/R 5-1 Port description of FL driver VIDEO1 VIDEO2 INPUT INPUT INPUT TAPE2 TAPE2...

  • Page 7: Adjustment

    C-V751 ADJUSTMENT INPUT OUTPUT TUNER/AMP ALIGNMENT ITEM ALIGN FOR FIG. SETTING SETTING SETTING POINTS SELECTOR : FM Connect a DC voltmeter to CN2 L31 (T) DISCRIMINATOR 98.0MHz MONO on tuner MONO L4(E,X) 1kHz, ±40kHz dev PCB. 98.0MHz 60dBu (ANT INPUT)
  • Page 8 : AC230V~ 50Hz (T,E) CONNECT WITH POWER AMPLIFIRE (X05-5082-70) : (E,X) TYPE (X05-4680-51) : (T) TYPE (X14- ) (D/4) MAIN VR (E,X) TYPE ONLY (X14- ) (B/4) (X14-7022-70) (A/4) FM75 POWER SW (TACT) (X14- ) (C/4) AM ANT DOOR MECHA (D40-1555-02) C-V751...

  • Page 9: Pc Board

    BOARD(Component side view) X05-5082-70 (J70-1353-01) AM STEREO MPX.FIL. FM IF AM RF FM DET MPX R32/W60 C31 C79 C40/R90 Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 10 PC BOARD(Component side view) X14 D/4 X14-7022-70 A/4 (J70-1333-21) X14 B/4 X14 C/4 Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 11 PC BOARD(Component side view) X08-2992-70 (J70-1334-21) POWER SUPPLY IC33 C204 R236 R238 C210 IC30 OESL R313 R314 C307 R315 C209 R354 C213 R325 C205 R291 C217 R290 R289 R284 R288 R285 R287 R286 C14 C13 4.332MHz C319 C318 C336 C211 IC32 CODEC IC31...
  • Page 12 PC BOARD(Component side view) X11 C/5 X11 D/5 PHONES X11-3862-70 A/5 (J70-1323-11) WH2(RED) WH1(WHT) T1.6A L 250V DGND IRGND UGND CN12 DGND UCOM+B UGND UCOM W126 MUTE MUTE W142 POWER SUPPLY W146 S-MUTE HP AMP 20dB C410 C408 R412 R410 W145 W131 R305...
  • Page 13 R45 3.3K PLL CE 470P R48 1K PLL DO CH.SPACE C-V751 (1/5) C-V751 MODULATION The DC voltage is an actual reading measured with a high impedance type voltmeter as the AM/FM signal generator is specified to MODE CARRIER ANT INPUT...
  • Page 14 DISCRI (X05-4680-51) : (T) TYPE 2.2K DETECTOR:BUFFER DET OUT:AMP 7.7V MW: 0V LM: 0.7V 3.6V 3.0V 2.4V +11V +11V 1.5K 0.01 1.9V 3.6V 3.7V 3.7V 3.7V L61 1uH +11V (1.8V) (1.4V) (0.4V) (3.6V) (3.6V) (3.6V) 2.9V 3.4V 11.0V 9.2V FM FRONT END A1 (W02-2584-05) 3.7V 9.1V...
  • Page 15 R102 SYSTEM Q103 X08- STEREO MUTE DRIVE +15V +15V MUTE -15.1V -15V ON :0.4V OFF :4.7V T.MUTE 7.0V (3.9V) (0.2V) PLL-DATA (2.3V) 7.0V PLL-CLK ON:FM PLL-CE OFF:AM PLL-DO (0.6V) MONO 14.5V 8.1V +15V 150 1W +11V C-V751 C-V751 (2/5) Y05-3942-70...
  • Page 16 (X08-299X-XX) 4.8V OPTICAL IN 10uH 2.2K R282 4.7K COAXAL IN DIGITAL INPUT SELECTOR C318 47u10 3.3V 1000P IC1,4 : TC74VHCT574AF : 27C04090JC1AHA IC3,29 : TC7WU04FU : CS492505-CLR : CS492604-CLR IC7,18 : uPC29M33HF : TA8409S AUDATA1 SCLKN2 IC10,11,30-33 : TC7WT241FU AUDATA0 SDATAN2 IC12 : SAA6579T/R...
  • Page 17 (X08-299X-XX) R44 220 R224 C196 1000P 4.9V IC29 2.4V 12.288MHz 3.3V 1.1V SDIN1 C198 R227 SDOUT2 1000P 3.3V 5.5V 1.5V 2.4V AOUT2 IC18 SDOUT1 2.4V 3.3V AOUT1 3 STATE R247 100 6.9V BUFFUR AGND1 2.4V R248 100 2.4V C37 0.022 C335 R323 10 IC15...
  • Page 18 (X08-299X-XX) 5.0V R201 R197 +15V +15V 14.8V 14.8V IC27 Lch MIX AMP. R153 (2/2) R139 C129 +15V +15V +15V +15V 4.7u35 C188 14.8V IC20 10u16 LSch R165 R143 IC13 (1/2) R137 27K R167 R156 C189 10u16 (1/2) 2.2K R171 R173 R179 C163 2.2K...
  • Page 19 AD-Lch D.REC-L TUNNER Lch TUNNER Rch D.REC-R 6ch IN-SR 6ch IN-SL 6ch IN-SW 6ch IN-C C-V751 (X08-299X-XX) CAUTION: For continued safety, replace safety critical com- DESTINATION R261, R262, ponents only with manufacturer's recommended parts (refer UNIT No. R305 R306 R335 COUNTRY ABB.
  • Page 20 X08- (X11-386X-XX) (A/4) X08- +15V +15V R101 VIDEO1 INPUT SELECTOR R102 R105 VIDEO1 PLAY R106 C163 R113 220P VIDEO2 PLAY C232 150P R114 +15V +15V TAPE2 14.8V R117 IC6(1/2) MONITOR C203 BUFFER C209 10u50 10u50 -15.1V PLAY R118 Rch 4 C210 10u50 C204...
  • Page 21 CS-RELAY +5.6V R392 47K 1/4W C139 100P C382 R390 14.0V 47u25 2.4K MUTE C140 100P R168 PROTECTION : AC240V~ 50Hz IC10(2/2) C141 100P : AC230V~ 50Hz C-V751 (T,E) RELAY+12V +12v +14.2v +14.2v +14.2V 1/4W R172 RELAY SW Y05-3942-70 C-V751 (4/5)
  • Page 22 X08- LEVEL MODE SOUND TUNING KEY2 CONT KEY3 KEY4 C-V751 (5/5) GND LINE TUNING LEVEL B LINE CONT B LINE +6.2V CAUTION: For continued safety, replace safety critical components only with manufacturer's recom- The DC voltage is an actual reading measured with a high impedance mended parts (refer to parts list).
  • Page 23 (B/4) PHONES (27P) (B/5) (D/4) (25P) DIGITAL TIMER INPUT MODE SET UP SOUND MODE DIGITAL CIRCIE MULTI.CONTROL SURROUND LEVEL MODE TAPE2 OPEN/ VOLUME TIMER PTY SELECT INPUT MONITOR MODE CLOCK DISPLAY PTY TA/NEWS A.MEMO AUTO BAND TUNING CLOSE CONTROL C-V751...
  • Page 24 Description Parts No. Parts No. Description Ref. No Parts nation marks ress ress Parts nation marks H50-3440-04 ITEM CARTON CASE C-V751 J02-1188-13 FOOT A01-3702-01 METALLIC CABINET 1C,2C J19-3732-04 UNIT HOLDER A09-1139-08 BATTERY COVER J19-5833-05 LEAD HOLDER A46-0303-11 REAR COVER J19-5919-05...

  • Page 25: Parts List

    C-V751 PARTS LIST New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Desti- Parts No. Parts No. Parts No.
  • Page 26 C-V751 PARTS LIST New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Desti- Parts No. Parts No. Parts No.
  • Page 27 C-V751 PARTS LIST New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Desti- Parts No. Parts No. Parts No.
  • Page 28 C-V751 PARTS LIST New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Desti- Parts No. Parts No. Parts No.
  • Page 29 C-V751 PARTS LIST New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Desti- Parts No. Parts No. Parts No.

  • Page 30: Parts Descriptions

    C-V751 PARTS DESCRIPTIONS...

  • Page 31: Specifications

    Stereo separation (DIN, 1 kHz) ........36 dB Frequency response ..... 30 Hz~15 kHz, + 0.5 dB, – 3.0 dB 1. KENWOOD follows a policy of continuous advancements in development. For reason specifications may be changed without notice. Notes Notes 2.

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