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CASSETTE RECEIVER
KRC-778R/RV/RY/RYV,
878R, PS978R
SERVICE MANUAL
The CASSETTE MECHANISM OPERATION DESCRIPTION is the same model D40-1122-05.
Please refer to the service manual for model D40-1122-05(B51-7452-00).
KRC-PS978R
Front glass
(B10-3095-01)
Escutcheon assy
(B07-2146-03)
KRC-878R
Front glass
(B10-3096-01)
Escutcheon assy
(B07-2139-03)
KRC-778R
Front glass
KRC-778R/RY :
(B10-3097-01)
KRC-778RV/RYV :
(B10-3098-01)
Escutcheon assy
(B07-2139-03)
Lever
Torsion coil spring
(D10-4301-14)
(G01-2924-04)
(D10-4302-14)
DC cord
Plastic cabinet assy
KRC-PS978R,878R,778R/RY :
(A02-1489-03)
(E30-4788-05)
KRC-778RV/RYV :
(E30-4789-05)
KRC-PS978R
.
/
/
KRC-878R
B.S/
MTL/
KRC-778R
B.S/
MTL/
Antenna adaptor
Remote controller assy
(T90-0523-05)
(A70-0886-15)
Mounting hardware assy
(J21-9491-03)
2000-2 PRINTED IN KOREA
C
B51-7589-00 ( K ) 1889
DISP
DISP
Screw set
(N99-1683-05)
Remote controller assy
(A70-0874-05)
Panel assy
(A64-1854-02)
Panel assy
(A64-1855-02)
Panel assy
KRC-778R/RY :
(A64-1856-02)
KRC-778RV/RYV :
(A64-1952-02)
40%
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Table of Contents
Related Manuals for Kenwood KRC-778R
Summary of Contents for Kenwood KRC-778R
- Page 1 (B07-2146-03) KRC-878R Panel assy (A64-1855-02) KRC-878R Front glass (B10-3096-01) Escutcheon assy DISP B.S/ MTL/ (B07-2139-03) KRC-778R Panel assy Front glass KRC-778R/RY : KRC-778R KRC-778R/RY : (A64-1856-02) (B10-3097-01) KRC-778RV/RYV : KRC-778RV/RYV : (A64-1952-02) (B10-3098-01) DISP B.S/ MTL/ Escutcheon assy (B07-2139-03) Lever...
- Page 2 (X13- ) DRIVER SW5V REMO Q57-62 IC1,2 RST SW DIMMER DC/DC (FOR 4.5V PRE) G/A SW DRIVER Q41,42 MAIN MOT KRC-PS978R KRC-778RV/RYV Q33,40,44 KRC-888 ILL AVR KRC-878R VLCD KRC-PS988R KRC-708 Depeds on the model. KRC-778R/RY Refer to the parts list. KRC-X858...
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Page 3: Microcomputer Terminal Description
KRC-778R/RV/RY/RYV,878R,PS978R MICROCOMPUTER TERMINAL DESCRIPTION UPD784217GC103(105) (IC1: X14-618X-XX) System MicroComputer Pin Name Signal Name Purpose Operation Description P120/RTP0 CHCON Changer control terminal. ON:Hi, OFF:Lo P121/RTP1 CH_MUTE Muting input to changer. ON:Hi, OFF:Lo P122/RTP2 REQH Handshake request to changer. P123/RTP3 DIMMER Small detection. - Page 4 KRC-778R/RV/RY/RYV,878R,PS978R MICROCOMPUTER TERMINAL DESCRIPTION UPD784217GC103(105) (IC1: X14-618X-XX) System MicroComputer Pin Name Signal Name Purpose Operation Description 52 P84/A4 WIDE K2I Forced Wide output. H:Forced Wide 53 P85/A5 NARROW I/O K2I Forced Narrow output. H:Forced Narrow During reception: Hi 54 P86/A6 Noise detection time constant SW /During search: Lo.
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Page 5: Test Mode
KRC-778R/RV/RY/RYV,878R,PS978R TEST MODE 2000 MODEL 3. Press and hold the AUDIO key for 1 second to enter the menu mode. (1) How to enter the test mode 4. Press the FM/AM key to select "SECURITY". Reset the set while holding the FM and preset 6 keys 5. - Page 6 KRC-778R/RV/RY/RYV,878R,PS978R TEST MODE (12.2) Procedure for canceling the MASK key (13) Other request (when the set is reset or the back-up o Automatic panel closing when the TAPE/CD/MD is power is turned off while the MASK key is inserted is disabled.
- Page 7 KRC-778R/RV/RY/RYV,878R,PS978R 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 TUNER OUTPUT ALIGNMENT ITEM INPUT SETTINGS (RECEIVER) ALIGN FOR FIG. SETTINGS POINTS SETTINGS FM SECTION 98.1MHz...
- Page 8 PC BOARD (Component side view) (Foil side view) X13-9720-10 (J74-0984-12) X13-9720-10 (J74-0984-12) ILL+B ILL+B L CLK L CLK L DATAL L DATAL REMO REMO DGND DGND DIMMER DIMMER LOCK SW LOCK SW RESET RESET ILL G ILL G Refer to the schematic diagram for the value of resistors and capacitors.
- Page 9 PC BOARD (Component side view) X14-618X-XX Ref.No. Address Ref.No. Address Ref.No. Address Ref.No. Address X14-618X-XX A/2 (J74-0986-22) IC10 IC11 R120 IC12 R121 IC13 IC14 C190 IC15 R122 C100 IC13 X14 B/2 R162 C137 R115 C136 R294 R342 C191 C157 R292 R304 R337 R318...
- Page 10 PC BOARD (Foil side view) (Component side view) (Foil side view) X14-618X-XX Ref.No. Address Ref.No. Address Ref.No. Address Ref.No. Address X14-618X-XX A/2 (J74-0986-22) IC10 IC11 IC12 C100 IC13 R120 IC14 R121 IC15 X87-301X-XX (J74-0985-12) X87-301X-XX (J74-0985-12) C190 R122 IC13 R162 C137 X14 B/2 R294...
- Page 11 CAP+ DGND KRC-PS978R C26 56P 4.0V C136 2-70 10.4V KRC-PS988R C19 0.1 4.0V AGND 120P KRC-878R C143 C21 0.1 4.0V KRC-778R/RY C118 4.0V 1u50 C157 0.01 DOLBY CREF C156 KRC-778RV/RYV : 0.4V DOLBY C22 0.1 4.0V 0-11 CAP- VOUT 0.018 0.027...
- Page 12 L DATAS NC 3 CONSTANT SW R335 DGND DGND 0Vor5.0V C256 NOISE IC11 RESET R337 GND OUT DEMODULATOR L CE R338 RST IC L CLK KRC-PS987R/PS988R (1/2) KRC-878R/858/888/708 (1/2) ILL-G KRC-778R/RY/RV/RYV (1/2) ILL+B 9 10 11 12 17 18 KRC-778R/RV/RY/RYV,878R,PS978R...
- Page 13 IC2 : LC75878W DTC114TK 2SD2114K B LINE IC3 : RS-171 KRC-X858 DTC114YK KRC-708 Q1,2 : DTA114EK or KRC-888 0-10 B38-1034 DTC114YUA UN2111 KRC-778R Q3,4 : 2SD2114K KRC-778RY DTC124EK Q5-7 : KRC107S KRC-PS988R 5.0V KRC-PS978R 0-21 B38-1035 : 2SC2412K or DTC144EK 2SD601A...
- Page 14 For continued protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. KRC-778R/PS988R/X858/778RVY/PS978R/878R/708/888/778R/778RY (2/2) KRC-778R/RV/RY/RYV,878R,PS978R...
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Page 15: Exploded View (Mechanism)
KRC-778R/RV/RY/RYV,878R,PS978R EXPLODED VIEW (MECHANISM) Parts with exploded numbers larger than 700 are not supplied. -
Page 16: Exploded View (Unit)
KRC-778R/RV/RY/RYV,878R,PS978R EXPLODED VIEW (UNIT) (X13-978) FPC1 (X13-978) (X13-978) (X13-978) (X13-972) (X13-972) (X13-972) (X13-972) (X13-978) FPC2 (X13-972) (X14) (X13-972) X13-9720-20 X14-6182-XX (X14) X87-301X-XX (A/2) X14-6182-XX (X92) (B/2) N83-3008-46 (X13-978) N83-3005-46 FPC2 M2x3 (BLK) N38-2030-45 M2x2 (BLK) N09-4184-05 M2x3 (BLK) N35-2003-45 2x8 (BLK) -
Page 17: Parts List
Teile ohne Parts No. werden nicht geliefert. Dest Dest Ref.No. Parts No. Description Ref.No. Parts No. Description inati inati D13-1302-64 GEAR ASSY KRC-778R/RV/RY/RYV, 878R, PS978R D13-1306-24 GEAR A02-1489-03 PLASTIC CABINET ASSY D13-1403-03 GEAR A10-4315-04 CHASSIS CALKING ASSY D13-1404-04 GEAR A10-4317-04 CHASSIS CALKING ASSY... -
Page 18: Switch Unit (X13-972X-Xx)
CHIP R 2.2K 1/10W C19 -22 CK73FB1C104K CHIP C 0.10UF E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV... - Page 19 CHIP C 0.47UF C136 CC73FCH1H121J CHIP C 120PF E63-0854-05 PIN JACK E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV...
- Page 20 RK73EB2B101J CHIP R 1/8W R174 RK73FB2A272J CHIP R 2.7K 1/10W E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV...
- Page 21 1/10W MA3075-M ZENER DIODE R303 RK73FB2A184J CHIP R 180K 1/10W E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV...
- Page 22 DIGITAL TRANSISTOR 2SD601A TRANSISTOR DTC124EK DIGITAL TRANSISTOR 2SB1565F(E,F) TRANSISTOR KRC103S TRANSISTOR E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV...
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Page 23: Dolby Noise Reduction Unit (X87-301X-Xx)
E39-0306-08 FLAT CABLE(FFCM4) R92-2052-05 CHIP R 1/10W T95-0245-08 PHOTO COUPLER E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV... - Page 24 PLAYBACK HEAD N19-2138-08 FLAT WASHER(2.1X3.5) N09-4327-08 SCREW N19-2139-08 FLAT WASHER(2.1X4.0) E : KRC-PS978R E3 : KRC-778RV E: Europe K: North America M: Other Areas E1 : KRC-878R E4 : KRC-778RY indicates safety critical components. E2 : KRC-778R E5 : KRC-778RYV...
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Page 25: Specifications
Weight 1.7kg 1.7kg 1.7kg 1.7kg KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. KENWOOD CORPORATION 14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo, 150-8501 Japan KENWOOD SERVICE CORPORATION KENWOOD ELECTRONICS ITALIA S.p.A. P.O. Box 22745, 2201 East Dominguez Street, Via G.