Kenwood KRF-V7771D Service Manual
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Kenwood KRF-V7771D Service Manual

Kenwood KRF-V7771D Service Manual

Audio video surround receiver
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AUDIO VIDEO SURROUND RECEIVER
KRF-V7771D/V7771DE

SERVICE MANUAL

(E,T type)
This manual is available for repair in the Europe and England markets.
Please refer to the original manual (B51-5426-00) if need the information in the USA and Canada and other
markets.
Indicator
(B12-0326-04)
ON/STANDBY
POWER
ON
OFF
Knob
Knob
(K29-6858-12)
(K27-2248-04)
Phono jack
(E63-1077-05)
Lock terminal board
Phono jack
(E70-0052-05)
(E63-1008-05)
PRE OUT
VIDEO4 6CH. INPUT
R
L
CENTER
FRONT
R
L
SURROUND
SURROUND
AM
CENTER
SUB
WOOFER
FRONT
REC
OUT
CD2 /
GND
TAPE 2
MONITOR
-
FM 75Ω
PLAY
IN
ANTENNA
REC
OUT
MD/
PHONO
TAPE 1
PLAY
IN
L
R
CD1
R
AUDIO
L
R
Phono jack
(E63-0139-15)x2
Phono jack
Phono jack
(E63-0200-05)
(E63-0136-15)x2
Knob
Led holder
(K29-6855-03)
(J19-5876-04)
CLIP INDICATOR
DOLBY DIGITAL
A
SPEAKERS
B
PHONES
Front glass
(B10-2418-03)
Phone jack
Indicator
(E11-0271-05)
(B12-0333-04)
Optical receiving module
(W02-1181-05)
Phono jack
(E63-1028-05)
SUBWOOFER
VIDEO
S VIDEO
VIDEO 2
VIDEO 3
VIDEO 4
CD 1
COAXIAL
COAXIAL
OPTICAL
OPTICAL
MONITOR
DIGITAL IN
OUT
PLAY
VIDEO 4
IN
PLAY
VIDEO 3
IN
PLAY
VIDEO 2
IN
REC
OUT
VIDEO 1
PLAY
IN
AUDIO
L
Cylindrical receptacle
(E56-0011-05)x2
Phono jack
(E63-0162-05)x2
Front glass
Knob
(B10-3455-03)
(K29-6855-03)
MPEG
Cinema Re-EQ
VOLUME
INPUT SELECTOR
MUTE
DISPLAY MODE
DOWN
UP
S VIDEO
Knob
(K29-6852-04)
Cylindrical receptacle
(E56-0012-05)
Miniature phone jack
Slide switch
(E11-0360-05)
(S62-0034-05)
Miniature Phone jack
(E11-0374-05)
( SL 16 )( XS 8 )
VIDEO 4
SL 16 XS 8
INPUT
6CH
SL 16
SYSTEM
2CH
TEXT
CONTROL
FRONT SPEAKERS
(4-16 Ω)
A
B
R
L
R
L
Screw terminal board
(E70-0095-05)
*Refer to parts list on page52~.
© 1999-1/B51-5498-00 (K/K) 1612
Panel
(A60-1580-12)
CD2 / TAPE2
MONITOR
AV AUX
V
L-AUDIO-R
Phono jack
(E63-1030-05)
Power cord bushing
(J42-0083-05)
AC outlet*
(E03-)
SWITCHED TOTAL
90W MAX.
SURROUND SPEAKERS
CENTER
(4-16 Ω)
SPEAKER
(4-16 Ω)
R
L
C
+
-
AC power cord*
(E30-)
Screw terminal board
(E70-0096-05)

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Summary of Contents for Kenwood KRF-V7771D

  • Page 1: Service Manual

    AUDIO VIDEO SURROUND RECEIVER KRF-V7771D/V7771DE SERVICE MANUAL (E,T type) © 1999-1/B51-5498-00 (K/K) 1612 This manual is available for repair in the Europe and England markets. Please refer to the original manual (B51-5426-00) if need the information in the USA and Canada and other markets.

  • Page 2: Table Of Contents

    KRF-V7771D/V7771DE CONTENTS / ACCESSORIES / CAUTIONS Contents CONTENTS / ACCESSORIES / CAUTIONS....2 WIRING DIAGRAM ............14 CONTROLS ..............3 PC BOARD ..............15 DISASSEMBLY FOR REPAIR........5 SCHEMATIC DIAGRAM ..........23 BLOCK DIAGRAM ............6 EXPLODED VIEW .............51 CIRCUIT DESCRIPTION ..........7 PARTS LIST...............52 ADJUSTMENT ............13 SPECIFICATIONS .............67...

  • Page 3: Controls

    KRF-V7771D/V7771DE CONTROLS MUTE indicator Multi-mode display MUTE TUNED Stereo indicator TUNED indicator Display CLIP INDICATOR DOLBY DIGITAL MPEG Cinema Re-EQ VOLUME INPUT SELECTOR SPEAKERS MUTE DISPLAY MODE ON/STANDBY DOWN POWER CD2 / TAPE2 MONITOR PHONES S VIDEO AV AUX L-AUDIO-R &...
  • Page 4 KRF-V7771D/V7771DE CONTROLS Note Note Perform “Model Type Setup” of the remote control before Main CD2/ Input Input ENTER using it. Menu Tape1 Tape2 Digital Analog Phono Tuner Remote The following menu display ap- Macro VOLUME Mode Video1 Video2 Video3 Video4...

  • Page 5: Disassembly For Repair

    KRF-V7771D/V7771DE DISASSEMBLY FOR REPAIR [Remove the bottom plate.] Make use of the changing final transistor etc. (1, 2) and PCB support, then 1. Remove the 19 screws remove the bottom plate. Fig. 1 [Check the vertical PCB] 1. (Exist bottom plate) Remove the hook of rear panel(1).
  • Page 6 SE-RLY RELAY D301-304 IC19 DRIVER (2/2) IC31 IC1(2/2), IC2(2/2) +5.6V u-COM AV AUX IN (FRONT) Q301 5ch SP. OUTPUT FINAL TR. KRF-V7771D(E,T) MD/TAPE1 RELAY 20.0V/4 DRIVER D251 REC OUT VIDEO1 (X25) (X07) FINAL TR. BUFFER (X25)(X07) PHONES 29dB POWER IC21...

  • Page 7: Circuit Description

    KRF-V7771D/V7771DE CIRCUIT DESCRIPTION 1. The back up item and initialization condition 1-1 Back up • SURROUND SP. : NORMAL/WIRED • POWER ON/OFF : OFF • SUB WOOFER : ON • VOLUME LEVEL : -66dB • SW Re-Mix : OFF • AUDIO INPUT • SELECTOR : TUNER •...
  • Page 8 KRF-V7771D/V7771DE CIRCUIT DESCRIPTION Push key I N P U T SELECTOR S P A S P B MUTE DISPLAY MODE P. CALL P. CALL AUTO/STEREO MANUAL/MONO TUNER STEREO DOWN (DOLBY DIGITAL LED : OFF TONE (TUNED) STEREO +10 (light on)
  • Page 9 PERFECT MACRO TV POWER DETECT L : TV POWER OFF, H : TV POWER ON VIDEO_STB VIDEO IC STROBE (NJU3713D) 9991_7771 TYPE SELECT L : KRF-V7771D, H : KRF-X9991D SEL_CLK ANALOG SW. CLOCK (TC9162-TC9164) VIDEO IC CLOCK (NJU3713D) 8_16 SERIAL SELECT...
  • Page 10 (1) TC9162/TC9163/TC9164 SW. CONTROL CD2/TAPE2 MONITOR:TAPE2 : ON ) (X25:IC23)TC9162AF (X11:IC4)TC9163AF (X11:IC1,2)TC9164AF INPUT TAPE2/ INPUT SURROUND SELECTOR L1 L2 L3 L4 L5 L6 L7 L8 R1 R2 R3 R4 R5 R6 R7 R8 L1 L2 L3 L4 L5 L6 L7 L8 R1 R2 R3 R4 R5 R6 R7 R8 MONITOR MODE MODE...
  • Page 11 KRF-V7771D/V7771DE CIRCUIT DESCRIPTION 6. Sub microprocessor uPD78056GC-A23 (X08 : IC5) 6-1 Microprocessor periphery block diagram (X08) IC25 (X08) IC30 CODEC MPEG/DSP MODE AC3/PROLOGIC CS4226 KQG DECODER CS492501 (X08) (X08) IC5 IC29 EX ROM MX27L2000MC-20 (X08) IC28 SUB uCOM ASIC KAG09...
  • Page 12 6-2 Pin description 6-3 PORT CONTROL 6-3-1 Pin3,5,6 EX ROM CONTROL CS492501 (x08 : IC30 ) CONDITION : BOOT Pin No. Name Description A15 (pin3) A16 (pin5) A17 (pin6) L : Transmitting data to CS4925 25/26 ASIC KAG09 CS4925/CS4226 SELECT AC-3 / PCM H : Transmitting data to CS4226 N.C.

  • Page 13: Adjustment

    KRF-V7771D/V7771DE ADJUSTMENT I N P U T OUTPUT RECEIVER ALIGNMENT I T E M ALIGN FOR F I G . N o . S E T T I N G S S E T T I N G S S E T T I N G S...
  • Page 14 UNIT No. COUNTRY ABB. WH11 VIDEO 1 CN12 105 C Lch 6 EUROPE 2-71 2 REC OUT Lch 2 KRF-V7771D (X07-294X-XX) (X07-) (H/8) 2ch/ VIDEO 3 VIDEO 2 DESTINATION Rch 5 UNIT No. (PLAY IN) PLAY IN COUNTRY ABB. TEMP.

  • Page 15: Pc Board

    PC BOARD(Component side view) X07-294X-XX A/8 (J70-1153-11) X07 B/8 X07 E/8 X07 F/8 X07 D/8 POWER Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 16 PC BOARD(Component side view) VIDEO4 INPUT sub DSP R391 R395 R445 R444 R396 R415 X08-2942-70 (J70-1250-11) R398 Format IC23 R393 R443 Converter R416 R394 IC22 R442 R302 R417 CN15 IC21 C172 CN13 sub u-com C179 R342 R338 R303 SYSTEM R346 R337 R388 R414...
  • Page 17 PC BOARD(Component side view) X11-3822-70 A/7 (J70-1251-11) R334 R328 R368 R342 R367 R327 R330 C212 R333 PRE OUT C210 C204 C148 R329 C144 W149 W161 R214 W308 W303 R331 R190 R228 C208 R204 R202 R378 C146 C346 C220 R206 C218 C216 R210 R332...

  • Page 18: Schematic Diagram

    PC BOARD(Component side view) X25 F/7 X25-6202-70 A/7 (J70-1292-11) C831 AUDIO W154 R828 W153 CN29 C829 PHONO R824 W275 R801 W256 R806 W280 R221 R821 R825 C208 W146 PHONO EQ C828 R804 W290 C811 C802 R462 C809 W115 VIDEO AVR R802 C801 W170...
  • Page 19 MODE CARRIER ANT INPUT X601 FREQUENCY DEVIATION R648 1K +15V 7.2MHz C688 98MHz 1kHz STEREO 67.5kHz 7.5kHz(Pilot) 60dB WH601 R647 3.3K 150P 1000(999)kHz 400Hz MONO 30% MOD 60dB R646 3.3K C644 470P R645 3.3K KRF-V7771D/V7771DE KRF-V7771D(E,T) (1/6) KRF-V7771DE(E2) (1/6) Y05-3862-70...
  • Page 20 CAUTION: For continued safety, replace safety critical components only with manufac- The DC voltage is an actual reading measured with a high imped- turer's recommended parts (refer to parts list). indicates safety critical components. ance type voltmeter with no signal input. The measurement value For continued protection against risk of fire, replace only with same type and rating may vary depending on the measuring instruments used or on the fuse(s).
  • Page 21 ROOM B SEL Rch INPUT SEL. ROOM B SEL Lch VIDEO1 REC Lch VIDEO1 REC Rch VIDEO2 REC Rch VIDEO2 REC Lch -17V +17V +17V +17V IC18 :SW ON) VIDEO ANALOG INPUT 6ch INPUT 2ch INPUT KRF-V7771D(E,ET) (2/6) KRF-V7771DE(E2) (2/6) KRF-V7771D/V7771DE Y05-3862-70...
  • Page 22 X25-B/7 SURROUND UNIT (X08-2942-70) (C/7) -E18 1000P VIDEO2 COAXIAL 1000P VIDEO3 COAXIAL R318 C180 DIGITAL 470P DIGITAL 100uH R326 R324 VIDEO4 OPTICAL R321 5.0V 0.8V 2.7V 2.5V IC26 C104 100uH DIGITAL R329 INPUT 4.7K SELECTOR IC27 OPTICAL INVERTER R320 R327 R328 DE-EMPH R1 100...
  • Page 23 (X08-2942-70) (C/7) IC26 INPUT SEL. DI/AI(PIN79) DSG(PIN78) DSB(PIN77) 14 DSA(PIN76) TYPE OUTPUT DIGITAL +7.4V +7.4V +7.4V +7.4V +7.4V EXCEPT C157 220u25 +3.3V +3.3V +3.3V R364 ANALOG VIDEO2 OPTION OPTION ONLY VIDEO3 VIDEO4 C134 100P VIDEO2 ANALOG VIDEO3 OPTION OPTION VIDEO4 IC31 VIDEO2 DIGITAL...
  • Page 24 WH10 (X08-2942-70) (C/7) CN19 CN15 11 10 11 12 13 14 15 CAUTION: For continued safety, replace safety critical components only with manufac- turer's recommended parts (refer to parts list). indicates safety critical components. CN12 5.0V IC55 REMOTE SLch For continued protection against risk of fire, replace only with same type and rating C265 C269 R485...
  • Page 25 R13 100 V.T DATA R12 100 SN761200N NJM4580L MC14577CF LM2940CT-5.0 V.T CLK R11 100 NJM4565M VOL STB R10 100 NJM4580ED TONE STB TC7W04FU +5.6V +5.6V R9 100 ROOM B FL F2 FL F1 X25-A/7 KRF-V7771D/V7771DE KRF-V7771D(E,T) (3/6) KRF-V7771DE(E2) (3/6) Y05-3862-70...
  • Page 26 CONTROL UNIT (X11-3822-70) (A/7) X11-C/7 -CN5 IC42 SELECTOR (DIRECT DAC LOW BOOST) (BYPASS TONE) VOL IN SR +17V +17V R541 VOL IN SL X11-B/7 VOL IN SW S-MUTE VOL IN C +17V VOL IN R IC42 (BOTTOM C531 R533 47u16 3.9K VOL IN L VIEW)
  • Page 27 (X11-3822-70) (A/7) +17V +17V +17V C117 10u50 IC21 E-VOL. LOUDNESS R121 C115 R129 R125 470K 220K 560P 8.2K R122 C116 220K 560P R127 470K C119 100P R347 470K C118 IC42 :SW ON) 10u50 , 27 10 19 11 18 C171 10u50 R348 470K...
  • Page 28 R216 C374 10u50 C148 C204 4.7u50 2.2K 10u50 C144 22u50 R210 2.2u50 2.2u50 IC31 2.2K IC26 (2/2) IC53 STAND BY:0V (2/2) (2/2) POWER ON:16.3V KRF-V7771D(E,T) (4/6) SWch 16.3V KRF-V7771DE(E2) (4/6) +17V +17V +17V +17V STAND BY:0V POWER ON:16.3V KRF-V7771D/V7771DE Y05-3862-70...
  • Page 29 -C/7 -CN7 ELECTRIC UNIT (X25-6202-70) (A/7) CN23 CN24 CN29 11 12 13 14 15 16 17.0V PHONO EQ AMP R17 10 (2/2) +17V +17V -A/7 1/4W 10u50 -CN3 10u50 0.01 220P 270K 100u10 0.012 3300P -A/7 PHONO -CN4 100u10 0.012 3300P 1000P 220P...
  • Page 30 1/4W D3SBA20F03 -3.2V R-GND IC81 C806 -17.8V (2/2) +31V +31V +31V +31V R825 1000P SE RELAY 4.7K -24.5V -25.2V P-CON -16.5V -17.2V CN82 CN81 FAN-H/L R806 30.1V FAN-ON/OFF 2.7 1/4W +31V +31V T1.6A L250V KRF-V7771D(E,T) (5/6) KRF-V7771D/V7771DE KRF-V7771DE(E2) (5/6) Y05-3862-70...
  • Page 31 (X25- ) (E/7) -A/7 POWER AMPLIFIER UNIT (X07-294X-XX) (A/8) Q11-14,51-54,101,102 CURRENT LIMIT 100 1/4W SRch Q1-10 1.0V A SP. FINAL TR. 54.4V ON/OFF 53.4V A SP. IDLE 47 1/4W TEST 3.3K SLch 150K 0.4V 0.33 0.33 (X07-) (B/8) 2.7 1W 1/4W FRONT SP.

  • Page 32: Parts List

    (X25-6202-70) (C/7) MUTE (X07- ) (E/8) AC230~ 50Hz TUNED KRF-V7771DE (X07-2942-71) DESTINATION CN25, W187 UNIT No. F7 COUNTRY ABB. EUROPE 2-71 E03-0149-05 KRF-V7771D (X07-294X-XX) DESTINATION CN25, UNIT No. W187 COUNTRY ABB. U.K. 0-51 E03-0310-05 EUROPE 2-71 E03-0149-05 (X07- ) (C/8) C282 6800P +5.6V...
  • Page 33 Push Rivet : N29-0216-05 (F/7) M3x8 : N89-3008-46 VOLUME (D/7) (D/8) POWER (B/7) (B/7) (C/7) (G/7) PHONO (1/2) X11-3822-70 (A/7) (D/7) (2/2) X25-6202-70 VIDEO AV AUX (F/7) (A/7) J 3 J 2 PREOUT INPUT SELECTOR SPEAKERS MUTE DISPLAY MODE KRF-V7771D (E)
  • Page 34 POWER TRANSFORMER L : Scandinavia K : USA P : Canada R : Mexico C : China I : Malaysia E,T1 : KRF-V7771D L : Scandinavia K : USA P : Canada R : Mexico C : China I : Malaysia...
  • Page 35 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 36 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 37 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 38 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 39 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 40 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 41 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 42 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. & Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 43 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 44 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. ™ ¡ Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 45 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. £ ¢ Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 46 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. § ∞ Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 47 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. ¶ • Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 48 New Parts Parts without Parts No. are not supplied. ª Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Add- Ref. No Parts No. Description ress Parts nation marks Q311, 312 2SA1586(Y,GR) TRANSISTOR...

  • Page 49: Specifications

    Input level / impedance / wave length Optical ....-15 dBm ~ -21 dBm, 600 nm ±30nm Coaxial ............0.5 Vp-p / 75 Ω 1. KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. Notes Notes...
  • Page 50 KENWOOD ELECTRONICS SINGAPORE PTE LTD. KENWOOD ELECTRONICS U.K. LIMITED No. 1 Genting Lane #02-02, KENWOOD Building, Singapore, 349544 KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB., United Kingdom KENWOOD ELECTRONICS (MALAYSIA) SDN BHD. KENWOOD ELECTRONICS BELGUM N.V. #4.01 Level 4, Wisma Academy Lot 4A, Jalan 19/1 46300 Petaling Jaya Selangor Darul Ehsan...

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