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Kenwood AR-304 Service Manual

Audio video surround receiver
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AUDIO VIDEO SURROUND RECEIVER
AR-304/KRF-A4020/
A4020E/A4020W
SERVICE MANUAL
Knob
Indicator
(K29-7365-12)
(B12-0334-14)
KENWOOD badge
(B43-0302-04)
AV SURROUND RECEIVER
STANDBY
ON / STANDBY
-
POWER
ON
OFF
PHONES
Phone jack (3P)
Knob
(E11-0295-05)
(K27-2185-04)
Slide switch
(S62-0034-05)
75 s
DE-EMPHASIS
FM 100kHz
CHANNEL
AM 10 kHz
SPACE
50 s
FM 50kHz
AM 9kHz
AM
PLAY IN
PLAY IN
GND
FM
L
75Ω
R
PHONO
AUX
Phono jack
(E63-0068-15)
Lock terminal board
Phono jack
(E70-0080-05)
(E63-0173-05)
Please check the tuner PCB number before change C42,43 and X1 with new one .
Front glass
(B10-3475-02)
DIMMER
SPEAKERS
TAPE2/
SOURCE
A
B
MUTE
BASS BOOST
MONITOR
DIRECT
BALANCE
Knob
(K29-7365-12)
Metallic cabinet
Miniature phone jack
(A01-3533-01)
(E11-0347-05)
SYSTEM CONTROL
REC OUT
PLAY IN REC OUT PLAY IN
SL16
SUBWOOFER
TAPE2/
MD / TAPE1
(XS 8)
MONITOR
PRE OUT
Phono jack
(E63-1016-05)
Slide switch
(S62-0034-05)
Knob
(K29-7310-03)
P.CALL
BAND
P.CALL
AUTO
MEMORY
MULTI CONTROL
INPUT SELECTOR
SOUND
Knob
(K29-7307-14)
Slide switch
(S62-0001-05)
AC 220 -
AC 110 -
120V
240V
SPEAKERS
R
L
A
+
-
-
+
+
-
-
+
B
R
L
Lock terminal board
(E70-0068-05)
Illustration is KRF-A4020 Mtype.
© 1999-1/B51-5501-00 (K/K) 3390
Panel
Knob
(A60-1585-01)
(K29-7306-14)
TRAIT
VOLUME CONTROL
DOWN
UP
Foot
(J02-1167-03)
AC power cord
(E30-2592-15)
Power cord bushing
(J42-0083-05)
AC 110 -
AC 220 -
120V
240V
SWITCHED TOTAL
150W MAX
AC 110 -120V/220 -240V '
50/60HZ
AC outlet
(E03-0149-05)

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  Summary of Contents for Kenwood AR-304

  • Page 1 AUDIO VIDEO SURROUND RECEIVER AR-304/KRF-A4020/ A4020E/A4020W SERVICE MANUAL © 1999-1/B51-5501-00 (K/K) 3390 Knob Indicator Front glass Knob Panel Knob (K29-7365-12) (B10-3475-02) (B12-0334-14) (K29-7310-03) (A60-1585-01) (K29-7306-14) KENWOOD badge (B43-0302-04) TRAIT AV SURROUND RECEIVER VOLUME CONTROL STANDBY DIMMER P.CALL BAND P.CALL AUTO...
  • Page 2: Table Of Contents

    AR-304/KRF-A4020 CONTENTS / ACCESSORIES / CAUTIONS Contents CONTENTS/ACCESSORIES/CAUTIONS....2 SCHEMATIC DIAGRAM ..........11 CIRCUIT DESCRIPTION ..........3 EXPLODED VIEW .............21 ADJUSTMENT ............6 PARTS LIST...............22 WIRING DIAGRAM ............7 SPECIFICATIONS .............28 PC BOARD ..............8 Accessories indoor antenna AM loop antenna (1) (T90-0833-05) AC plug adaptor (1)
  • Page 3: Circuit Description

    AR-304/KRF-A4020 CIRCUIT DESCRIPTION 1. BACK UP DATA AND INITIAL STATE (2) TUNER • BAND ........FM 1-1 BACK UP • PRESET CHANNEL....."- - " (1) AMP • FREQUENCY.......LOWER LIMIT VALUE • POWER........STANDBY K1 .........FM:87.50MHz/AM:530kHz • INPUT SELECTOR ....TUNER E1/E3 ......FM:87.50MHz/AM:531kHz • BALANCE ......CENTER Q1 .........FM:65.00MHz/AM:531kHz...
  • Page 4: Circuit Description

    AR-304/KRF-A4020 CIRCUIT DESCRIPTION 4. Microprocessor CXP82840-163Q, CXP82832-162Q (X09, IC51) 4-1 Microprocessor periphery block diagram diagram FL DISPLAY ED51 10-BT-216GK MATRIX X09, IC54 RDS IC SAA6579/R 16SEGMENT (PHILIPS) 10GRID E/T/Q TYPE ONLY X05, IC2 (STANDBY) TUNER LC72131 POWER RELAY SPEAKER A RELAY...
  • Page 5 AR-304/KRF-A4020 CIRCUIT DESCRIPTION 4-2 Pin descriptions Pin No. Pin name Description Active G9,G10 FL grid control (9,10). Unused. RDS,CK RDS IC clock input control. (E/T/Q type only) RDS,DT RDS IC data input control. (E/T/Q type only) Unused. VOL.ENC.A Volume encoder A (CW) signal.
  • Page 6: Adjustment

    AR-304/KRF-A4020 ADJUSTMENT OUTPUT RECEIVER ALIGNMENT N o . I T E M INPUT SETTINGS ALIGN FOR F I G . S E T T I N G S S E T T I N G S P O I N T S...
  • Page 7 TUNER UNIT DISPLAY UNIT (X05-XXXX-XX) (X09- ) (B/8) Lch 1 AR-304 (X09-6310-10) PHONO DESTINATION UNIT No. Rch 2 AR-304 (X05-5050-10) KRF-A4020E (X05-4982-71) COUNTRY ABB. DESTINATION DESTINATION U.S.A. UNIT No. UNIT No. FM75 0-10 COUNTRY ABB. COUNTRY ABB. CANADA U.S.A. EUROPE...
  • Page 8: Pc Board

    PC BOARD(Component side view) TUNER UNIT X05-498X-XX/X05-505X-XX TUNED ANTENNA Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 9 PC BOARD(Component side view) AUDIO UNIT AC OUTLET MONITOR MD/TAPE SPEAKERS PRE OUT PLAY IN REC OUT REC OUT PLAY IN PLAY IN PHONO PLAY IN SYSTEM CONTROL X09-6310-10 A/8 R151 R152 R128 R104 R105 C119 R126 R103 R203 R125 R199 W140 R200...
  • Page 10 TUNER UNIT (X05-XXXX-XX) FM TUNING LEVEL C40 2P 10uH 0.01 3.6V 330P [0.6V] 14.4V FM/AM/MPX SYSTEM IC 10u16 0.01 DETECT 100K BUFFER 4.2V 10u16 2.8V EMPHASIS 75uS: ON 50uS: OFF DECODER 50uS ANTI-BIRDIE [75uS] RF.AMP P-DET STEREO BUFF MUTE AM IF (K,P,M,X) TYPE PILOT 304KHz...
  • Page 11: Parts List

    AR-304 (X05-5050-10) DESTINATION R15,29, R27, R72, C8,35, C30, C70,71,77, UNIT No. : LC72131 36,82 74,89,90 79,80,82 COUNTRY ABB. U.S.A. 0-10 3.3K 7.5K 470P 0.022 0.033 Q1,3,4,6,7 : 2SC4081(R,S) or CANADA 2SC4116(Y,GR) or DESTINATION W82, 2SD1819A(Q,R) CF1,2 L4-7 COUNTRY ABB. Q2,12,14...
  • Page 12 AUDIO UNIT (X09-6XXX-XX) (A/8) 30 29 28 27 26 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 +5.6V +5.6V W155 S LEVEL +15V +15V STEREO R ch C122 0.01 14.7V X05- INPUT SELECTOR L ch 14.2V +15V...
  • Page 13 AR-304 (X09-6310-10) X09-B/8 DESTINATION R53, R65,66, R71, R99, R114, R151, C1,2,17-26,31,32, C65, C96, C125, W1,2,64,155, W3,4,6,65,88, CN2,6,13, -CN9 UNIT No. WH1,2 L1,2 205,206 67,68,71-74,135,136 156,165,166 167-170 14,17,18 COUNTRY ABB. (X09-6XXX-XX) U.S.A. 56.5V 58.3V (A/8) 0-10 8.2K 4700u75 CANADA 1.3V 47 1/4W...
  • Page 14 DISPLAY UNIT (X09-6XXX-XX) (B/8) KRF-A4020E (X09-6142-70) AR-304 (X09-6310-10) ED51 DESTINATION R503,504, C503,521, C529,530, W28, W72,114, D503, D505, DESTINATION R503, R504, C503,521, C529, W28, W114, D503-505, UNIT No. UNIT No. R509 S505 S511 S513 Q502 IC51 S505 S511 S513 Q502 IC51 COUNTRY ABB.
  • Page 15 P.CALL P.CALL BAND AUTO MEMORY S505 S511 S513 S504 S510 S515 SPEAKERS BASS TAPE 2 SOURCE MALTI INPUT VOLUME MONITOR BALANCE SOUND CONTROL SELECTOR CONTROL MUTE BOOST DIRECT S512 S501 S507 S509 S506 S503 S514 S502 S518 S517 S516 AR-304/KRF-A4020...
  • Page 16 Parts No. Description Ref. No Ref. No Parts No. Description ress Parts nation marks ress Parts nation marks H50-3256-04 ITEM CARTON CASE AR-304/KRF-A4020/A4020E/A4020W J02-1167-03 FOOT ETQE1 A01-3533-01 METALLIC CABINET J02-1167-03 FOOT A09-1123-08 BATTERY COVER J02-1405-03 FOOT (D=46,H=14.5,T) A60-1584-01 PANEL J19-5787-04...
  • Page 17 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 18 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 19 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 20 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 21 China England Europe Germany Korea Malaysia Ref. No Parts No. Description MODEL Parts nation marks ress ABB. M62492FP MOS-IC AR-304 TC9164AN MOS-IC NJM4565L-D ANALOGUE IC KRF-A4020 IC51 CXP82832-162Q MI-COM IC KPMX KRF-A4020E IC51 CXP82840-163Q MI-COM IC ETQE1 KRF-A4020W IC52 X24C02...
  • Page 22: Specifications

    Weight (Net) ..........8.0 kg (17.6 lb) Notes: 1. KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. 2. The full performance may not be exhibited in an extremely cold location (under a water-freezing temperature).
  • Page 23 Frequency response (30 Hz ~ 15kHz) ..+0.5 dB ~ –3.0 dB Notes: 1. KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. 2. The full performance may not be exhibited in an extremely cold location (under a water-freezing temperature).
  • Page 24 Av. Moema, 170-17˚, Andar-Cobertura “B”, Ed. Maximum Service Center, 04077-020 Moema, São Paulo-SP-Brasil KENWOOD ELECTRONICS U.K. LIMITED KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB., United Kingdom KENWOOD ELECTRONICS BELGUM N.V. Meachelsesteenweg 418, B-1930 Zaventem, Belgium KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrücker Str.

This manual is also suitable for:

A4020eKrf-a4020A4020w