Kenwood KRFV 8881 D Service Manual

Page 2

JKRF7V7771D(K)COVER(98t12t818:58 y [w 3
KRF-V7771DN8881D/VR-2080/2090

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+

CONTENTS / ACCESSORIES / CAUTIONS

Contents
CONTENTS / ACCESSORIES / CAUTIONS.
CONTROLS ....................................................
DISASSEMBLY FOR REPAIR.
BLOCK DIAGRAM ...................
CIRCUIT DESCRIPTION.
ADJUSTMENT .................

Accessories
Check that the following accessories are present.

WIRING DIAGRAM.
PC BOARD ..........

SCHEMATIC DIAGRAM.
EXPLODED VIEW ..........
PARTS LIST .........
SPECIFICATIONS

Remote control unit (1) :" ' AM loop antenna (1) (TQOVOSSSVOS) """""" I AC plug adapter (1)
(A7071191705) I Loop antenna stand (1) (E0370115705)
(J1973645705)

(Rch0907)
Battery cover(A0970378708)

BatterieisG/AA) (4)

FM Indoor antenna (1)
(Tgorosssrom

I @fl

Use to adapt the plug on the power cord
to the shape of the wall outlet. (Accessory
only for regions where use Is necessary.)

Cautions
How to reset the microcomputer

The microcomputer may malfunction (impossibility at operation,
erroneous display, etc.) when the power cord is unplugged and
plugged in again while the unit is in ON mode with the I/d) key
pressed or due to other external causes. In this case, execute the
procedure on the right to reset the microcomputer and return the
unit to the normal condition.

0 Resetting the microcomputer clears the memow you entered and
returns it to the initial condition when the unIt left the factory.

USA. and Canada

0 Unplug the power cord from the wall outlet.
9 While holding the l/L') (ON/STANDBY) key depressed, plug the
power cord into the wall outlet again.

Expect for USA. and Canada

OWith the power cord plugged in, turn the POWER key OFF.
9 Whill holding down the ON/STANDBV key, press POWER key.

Memory backup function

Please note that the following items will be deleted from
this units memory if the power cord is disconnected
from the AC outlet for approximately three days.

0 The input selection is cleared and the Tuner" input Is selected.

0 The volume setting is cleared and the volume is set to -65 dB".

0 The receIVIng band setting is cleared and the FM band Is
selected.

o The frequency setting is cleared and 87.5 MHZ Is selected.
0 The preset station memory is cleared.
o The surround setting is cleared and reset to the initial condition.

Page 55

LL

* New Pans

Parts Without Parts Nor are not suppIied.

%

* New Parts

Parts Without Pans No. are not supplied.

Les articles non mentionnes dans Ie Parts No, ne sent pas fournis. @ Les articles non mentionnes dams )9 Parts Nor ne sent pas fournis. @
TeiIe ohne Parts Nor werden nicht geIiefert. TeiIe chne Pans No. warden mcm geliefen
Add» New . . D s(- R - Add- New . . D s". R .
m No ms M Puts Mo. Dascummn mffio' "3, R21. No MS MS Pans Na. Description mffio'" mi,
D41 ,42 HSS104 DIODE IC1 NJM4580ED ANALOGUE IC
D41 ,42 158133 DIODE IC11,12 SN761200N ANALOGUE IC K2P2M2
D43 HZ55.15(52) ZENER DIODE IC11,12 SN761200N ANALOGUE IC M10102
D43 RD5.1J5(BZ) ZENER DIODE IC13 TC74HC4051 AP IC(ANALOG MULTIPLEXER) K2P2
D44 ,45 MA111 DIODE IC21 NJM2058D |C(OP AMP X4)
D48 HZS16N(52) ZENER DIODE M2C2 IC23 TC9162AF MOS-IO
D48 HZS18N(B) ZENER DIODE KP1Y1 IC51 SN761200N ANALOGUE IC
D48 HZS18N(5) ZENER DIODE K2P2 IC52 MC14577CF MOS-IC
D48 HZS18N(B) ZENER DIODE M1C1 IC53 NJU3713D MOS-IO
D48 RD16E5(52) ZENER DIODE M2C2 IC61 UPD780204-034 MI-COM IC
D48 RD18E5(B) ZENER DIODE KP1Y1 IC81 NJM4558D ANALOGUE IC
D48 RD18E5(B) ZENER DIODE K2P2 A IC82 TA790055 IC(VOLTAGE REGULATOR/ >5V)
D48 RD18E5(B) ZENER DIODE M1C1 A IC82 UPC7905AHF IC(VOLTAGE REGULATOR/ -5V)
D49 HZS10N(52) ZENER DIODE KP1Y1 A IC83 TA78055 ANALOGUE IC
D49 HZS10N(52) ZENER DIODE K2P2 A IC83 UPC7805AHF ANALOGUE IC
D49 HZS10N(52) ZENER DIODE M1 C1 A IC84 SI-3082V ANALOGUE IC
D49 HZS15N(52) ZENER DIODE M2C2 IC90 * EA7645N IC
D49 RD10J5(52) ZENER DIODE KP1Y1 IC91 NJM4580L ANALOGUE IC
D49 RD10J5(52) ZENER DIODE K2P2 01 >6 25C4213(5) TRANSISTOR K2P2
D49 RD10J5(52) ZENER DIODE M1C1 012 25C4081(R5) TRANSISTOR K2P2M2
D49 RD15E5(52) ZENER DIODE M2C2 012 25C4081(R,S) TRANSISTOR M1C102
D55 ,56 DA204K DIODE 014 25C4081(RS) TRANSISTOR K2P2M2
D57 HZS24N(B) ZENER DIODE K2P2 014 25C4081(R5) TRANSISTOR M1 C1 ()2
D57 RD24E5(B) ZENER DIODE K2P2 015 ,16 25C4213(5) TRANSISTOR
D58 -60 MA111 DIODE 017 25C4213(5) TRANSISTOR K2P2
D61 HZS3.3N(B) ZENER DIODE 030 ,31 25C4081(RS) TRANSISTOR K2P2M2
D61 RD3.3E5(B) ZENER DIODE 030 ,31 25C4081 (RS) TRANSISTOR M1 C1 ()2
D62 HZS2.7N(B) ZENER DIODE 032 DTC113ZUA DIGITAL TRANSISTOR K2P2
D62 RD2.7E5(B) ZENER DIODE 032 UN5219 DIGITAL TRANSISTOR K2P2
D74 ,75 MA111 DIODE 052 25C4081(RS) TRANSISTOR
D77 HZS5.15(52) ZENER DIODE 053 DTA113ZUA DIGITAL TRANSISTOR
D77 RD5.1J5(52) ZENER DIODE 053 UN5119 DIGITAL TRANSISTOR
D78 MA111 DIODE 054 DTC124EUA DIGITAL TRANSISTOR
D81 ,82 1 B4541 DIODE 054 UN5212 DIGITAL TRANSISTOR
D83 ,84 HZS15N(B) ZENER DIODE 055 25C4213(5) TRANSISTOR
D83 ,84 RD15E5(B) ZENER DIODE 081 25C2458(Y,GR) TRANSISTOR
D85 HZS5.15(52) ZENER DIODE 081 25C3311A(Q,R) TRANSISTOR
D85 RD5.1J5(52) ZENER DIODE 082 25A1048(Y,GR) TRANSISTOR
D86 S5688B DIODE 082 25A1309A(Q,R) TRANSISTOR
D87 HZS11N(B) ZENER DIODE A 083 2551370 TRANSISTOR
D87 RD11J5(B) ZENER DIODE A 084 25D2061 TRANSISTOR
D88 D3SBA20F03 DIODE A 085 2551370 TRANSISTOR
D89 HZS11N(B) ZENER DIODE A 086 25D2061 TRANSISTOR
D89 RD11J5(B) ZENER DIODE 0301 -304 25A992(F,E) TRANSISTOR
D90 ,91 MA111 DIODE 0305-308 25C2631(RS) TRANSISTOR
D92 -95 DA204K DIODE K2P2M2 0309,310 25A1123(RS) TRANSISTOR
D92 -95 DA204K DIODE M1C102 0311,312 25A1586(Y,GR) TRANSISTOR
D96 MA111 DIODE K2P2M2 0351-354 25A992(F,E) TRANSISTOR
D96 MA111 DIODE M1C1C2 0355-358 25C2631(RS) TRANSISTOR
D901 ,902 MA111 DIODE C2 0359,360 25A1123(R,S) TRANSISTOR
D901 ,902 MA111 DIODE K2P2M2 0361 ,362 25A1586(Y,GR) TRANSISTOR
D998 HZS15N(B) ZENER DIODE 0401 ,402 25A992(F,E) TRANSISTOR
D998 RD15E5(B) ZENER DIODE 0403404 2502631 (RS) TRANSISTOR
D999 MA111 DIODE 0405 25A1123(RS) TRANSISTOR
ED1 =11 16-MT-62GK INDICATOR TUBE 0406 25A1586(Y,GR) TRANSISTOR
L: Scandinavia K : USA P : Canada I : Mexico 0 : China I : MalaySIa L : Scandinavia K : USA P : Canada R : Maxim C 2 China I : MaIaysia
V: PXIFarEasI, HawaH) T: Europa E : Europe G : Germany V : China (Shanghai) V: PXIFarEasK, Hawaii) T: Europe E: Eurupa G : Germany V 2 China (Shanghai)
V : AAFESIEumpa) X : AustraIIa [1: Russia H : Kurea M : Other Areas A Indlnatas safety crincaI Eumpunems V : AAFESIEurupe) X : AusUaIia I] : Russia H : Korea M 2 Other Areas A indicates safely ClIlIEaI compunenls,

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