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Kenwood KRC-666 Service Manual
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Kenwood KRC-666 Service Manual

Kenwood KRC-666 Service Manual

Cassette receiver
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Download this manual See also: Instruction Manual
CASSETTE RECEIVER
KRC-666/G/R
QQ
3 7 63 1515 0
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).
TE
L 13942296513
Mounting hardware assy
(J22-0011-03)
www
Lever
(D10-4589-04)x2
.
Panel assy
(A64-2846-02): KRC-666
(A64-2856-02): KRC-666G
DAB
Panel assy
(A64-2845-02): KRC-666R
DC cord
(E30-4790-05): KRC-666R
Antenna adaptor
(T90-0523-05): KRC-666R
x
ao
u163
y
i
2 9
8
Q Q
3
6 7
1 3
1 5
Escutcheon
(B07-3022-02): KRC-666R
DC cord
(E30-4784-05): KRC-666/G
Plastic cabinet assy
(A02-1486-13)
Screw set
(N99-1719-05)
co
.
9 4
2 8
© 2002-12 PRINTED IN JAPAN
B53-0016-00 ( N ) 484
DOLBY B NR
AUTO
AME
Escutcheon
(B07-3022-02): KRC-666
(B07-3054-02): KRC-666G
0 5
8
2 9
9 4
2 8
DOLBY B NR
Remote controller assy (RC-410)
(A70-2025-05): KRC-666/R
m
9 9
9 9
Screw set
(N99-1730-15)

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Summary of Contents for Kenwood KRC-666

  • Page 1 © 2002-12 PRINTED IN JAPAN B53-0016-00 ( N ) 484 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). Panel assy (A64-2846-02): KRC-666 (A64-2856-02): KRC-666G DOLBY B NR AUTO Escutcheon...
  • Page 2 KRC-666/G/R DISASSEMBLY FOR REPAIR 3 7 63 1515 0 How to remove the Volume Knob How to install the Volume Knob 1. Remove the rear cover of panel unit. 1. Remove the peeling paper of LIGHTING BOARD BOSS 2. Juck up as remove the switch unit (x16-) and Volume Knob side.
  • Page 3 3 7 6 3 1 5 1 5 0 MODE K,M-TYPE E-TYPE TAPE 1800mV 1800mV 1800mV 1372mV MP IN 600mV 855mV E-VOL TUNER 3600mV 3600mV LEVEL & AM+B SW5V PRE MUTE PRE OUT TAPE SW5V AUDIO OUT QUAL BUFFER DECODER BUFFER S-METER MUTE...
  • Page 4 KRC-666/G/R COMPONENTS DESCRIPTION 3 7 63 1515 0 SWITCH UNIT (X16-2030-21) Ref. No Purpose Function Operation/Condition/Compatibility ¡ LCD driver Drives LCD Remote control IC Controls the unit Q1,Q4 REMO ON switch The power supply of IC2 is turned on when base level goes "L"...
  • Page 5 KRC-666/G/R MICROCOMPUTER'S TERMINAL DESCRIPTION 3 7 63 1515 0 SYSTEM MICROCOMPUTER MN101C49HNA (IC1: X14-) Pin No. Name Module Description Processing Operation VREF- Power supply GND for A/D F REEL TAPE Reel pulse FWD Cassette mecha reel pulse output FWD Vth=2.5V...
  • Page 6 KRC-666/G/R MICROCOMPUTER'S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Name Module Description Processing Operation PLL CLK TUNER I/O Tuner I2C SCL PANEL 5V to PANEL I/O Panel 5V ON/OFF Attached the panel, ACC ON :L (Refer to "Truth table 5")
  • Page 7 KRC-666/G/R MICROCOMPUTER'S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Name Module Description Processing Operation FWD input :L TAPE O Tape EQ input switching REV input :H MODE except TAPE :keep the value NORMAL :H, METAL :L METAL TAPE...
  • Page 8 KRC-666/G/R TEST MODE 3 7 63 1515 0 1. How to enter the test mode 7. Test mode specifications of the cassette receiver • While holding the Preset 1 and Preset 3 keys, reset the unit. • BLANK SKIPP :OFF 2.

  • Page 9: Test Mode

    KRC-666/G/R TEST MODE 3 7 63 1515 0 11. Special display when the display is All ON Security Pressing the Preset keys while the power is All OFF • Forced Power ON mode (All models) displays the following information. Even when the security is approved, resetting the unit...
  • Page 10 KRC-666/G/R ADJUSTMENT 3 7 63 1515 0 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.
  • Page 11 KRC-666/G/R 3 7 63 1515 0 DTC143TUA PRE OUT ∗ UN5114 REAR FRONT (X14-9180-2x) UN5211 UN5216 C356 C357 ANT. 0.01 0.01 2SA1036K 52mH ∗ 2SA1576A R355 R356 R361 R362 RF GND Q351 Q352 Q355 Q356 FM ANT AM ANT OSC GND...
  • Page 12 KRC-666/G/R 3 7 63 1515 0 DC-IN SP OUT F1 10A FUSE POWER ANTENN DETECT R252 R254 1.5K C258 3300u16 D270 ∗ TEL MUTE 1u50 C256 C255 22u16 D269 0.01 0.47u50 R255 ∗ R33 47K ACC DETECTION POWER 4.7K 5.0V...
  • Page 13 5.0V L-CE R11 1K R REEL OUT2 EJECT 5.0V D-GND R12 1K RESET 6 L-DATAL OUT1 R13 1K 4.0V REMO NC10 ILL+B ILL-GND 3 TAKE UP PANEL-5V D-GND 1 EJECT TAKEUP REEL 0.01 10 11 KRC-666/G/R (1/2) u163 X14-9180-2x (3/3)
  • Page 14 KRC-666/G/R 3 7 63 1515 0 SWICTH UNIT (X16-2030-21) TP18 TP19 TP20 TP21 TP22 TP23 TP24 TP25 TP26 ESD-GND 0.01 TP13 TP27 FLIP DET AUTO RESET RESET VOL A ILL-GND 0.01 0.01 VOL B 1Kx4 ILL+B 1Kx4 TP11 R6 1K...
  • Page 15 3 7 63 1515 0 ED1(SEGMENT) ED1(COMMON) L 13942296513 KRC-666/R/G (2/2) u163 CAUTION : For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list). Indicates safety critical components. 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.
  • Page 16 KRC-666/G/R PC BOARD 3 7 63 1515 0 (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) X16-2030-21 (J74-1452-02) X16-2030-21 (J74-1452-02) FLIP DET VOL B VOL A REMO ILL +B ILL GND D GND L 13942296513 X16-2030-21 Ref. No address X89-2570-11 (J74-1450-02) X89-2570-11 (J74-1450-02)
  • Page 17 KRC-666/G/R 3 7 63 1515 0 PC BOARD (COMPONENT SIDE VIEW) L 13942296513 u163 X14-9180-2x Ref. No address Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 18 KRC-666/G/R PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 W102 R422 W103 R166 Q152 R257 C410 C111 R266 C408 C265 D251 C257 D257 R256 D253 D255 C262 R416 R417 C201 R261 R153 R420 R421 R162 C202 R411 R412...
  • Page 19 KRC-666/G/R EXPLODED VIEW (MECHANISM) 3 7 63 1515 0 L 13942296513 u163 Parts with the exploded numbers larger than 700 are not supplied.
  • Page 20 KRC-666/G/R EXPLODED VIEW (UNIT) 3 7 63 1515 0 CME1 N09-4368-05 M3x3.5 M2.6x8 N30-2608-46 φ 2x6 N80-2006-46 φ 2x8 N80-2008-45 φ 3x5 N83-3005-46 φ 2x5 N84-2005-45 φ 2.6x6 N84-2606-45 φ 3x8 N80-3008-46 φ 3x8 L 13942296513 N83-3008-46 φ 3x20 N83-3020-46 (X14-) Depends on the model.
  • Page 21 J22-0011-03 MOUNTING HARDWARE ASSY C111 CK73GB1H102K CHIP C 1000PF K C112,113 CC73GCH1H270J CHIP C 27PF K23-1072-13 KNOB (VOL) K24-4000-03 KNOB (EJECT) C114 CK73GB1H103K CHIP C 0.010UF K indicates safety critical components. M2 : KRC-666R M3 : KRC-666 M4 : KRC-666G...

  • Page 22: Parts List

    J 1/10W RK73GB2A563J CHIP R J 1/10W R157-159 RK73GB2A102J CHIP R 1.0K J 1/10W RK73GB2A104J CHIP R 100K J 1/10W R160 RK73GB2A222J CHIP R 2.2K J 1/10W indicates safety critical components. M2 : KRC-666R M3 : KRC-666 M4 : KRC-666G...
  • Page 23 Q351,352 DTC143TUA DIGITAL TRANSISTOR D157,158 MA4062-L ZENER DIODE Q351,352 KRC410 DIGITAL TRANSISTOR D160-162 MA4062-L ZENER DIODE Q351,352 UN5216 DIGITAL TRANSISTOR D163 MA8062 ZENER DIODE PTH9C42BE471Q POSITIVE RESISTOR indicates safety critical components. M2 : KRC-666R M3 : KRC-666 M4 : KRC-666G...
  • Page 24 R11 -13 RK73EB2E102J CHIP R 1.0K J 1/4W T31-0230-08 PLAYBACK HEAD S70-0871-05 TACT SWITCH u163 CASSETTE MECHANISM ASSY (D40-1147-05) A10-4630-08 CHASSIS ASSY D10-4375-08 SLIDER D13-1494-08 GEAR D13-1495-08 GEAR indicates safety critical components. M2 : KRC-666R M3 : KRC-666 M4 : KRC-666G...
  • Page 25 KRC-666/G/R PARTS LIST 3 7 63 1515 0 CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc.
  • Page 26 Weight 1.20kg 1.20kg KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. Manufactured under license from Dolby Laboratories."Dolby" and the double-D symbol are trademarks of Dolby Laboratories. KENWOOD CORPORATION 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo 192-8525, Japan KENWOOD ELECTRONICS ITALIA S.p.A.

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Krc-666gKrc-666r