Kenwood KRC-225 Service Manual
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Kenwood KRC-225 Service Manual

Cassette receiver
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See also: Instruction Manual
CASSETTE RECEIVER
KRC-225/235
KRC-265/S
SERVICE MANUAL
KRC-225
Escutcheon
(B07-2124-02)
KRC-265/S
Escutcheon
(B07-2124-02):KRC-265
(B07-3049-02):KRC-265S
Plastic cabinet assy
(A02-1486-13)
DC cord
(E30-4783-05):KRC-225/235
Panel assy
(A64-2506-02)
Panel assy
(A64-2507-02):KRC-265
(A64-2634-02):KRC-265S
Lever
(D10-3031-04)x2
DC cord
(E30-4784-05):KRC-265/S
© 2001-11 PRINTED IN KOREA
B51-7854-00 (K) 1748
KRC-235
Escutcheon
(B07-2124-02)
Screw set
(N99-1610-15)
Screw set
(N99-1719-05)
Panel assy
(A64-2505-02)
Mounting hardware assy
(J21-9491-13)

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Summary of Contents for Kenwood KRC-225

  • Page 1 CASSETTE RECEIVER KRC-225/235 KRC-265/S SERVICE MANUAL © 2001-11 PRINTED IN KOREA B51-7854-00 (K) 1748 KRC-235 KRC-225 Panel assy Panel assy Escutcheon Escutcheon (A64-2506-02) (A64-2505-02) (B07-2124-02) (B07-2124-02) KRC-265/S Panel assy Escutcheon (A64-2507-02):KRC-265 (B07-2124-02):KRC-265 (A64-2634-02):KRC-265S (B07-3049-02):KRC-265S Mounting hardware assy Plastic cabinet assy...
  • Page 2 MAIN TAPE :1681mV Q370,371 CD/MD-CH :3529mV ANT-CONT. ANT-CONT. EQ. AMP. SW5V SW 5V BU5V P-CONT. B.U.5V PACK IN TAPE Q301 Q320 KRC-225/235 55.6mV PAN 5V P-CONT. Q54-57 /ANT-CONT. COM +B Q350-353 (X16-) Q58-61 P-CONT. ILLUMI. T-MUTE (FF/REW) Q51,52 B.U. DET.

  • Page 3: Component Description

    KRC-225/235/265/265S COMPONENT DESCRIPTION ¶ SWITCH UNIT(X16-1490-XX) Ref.No. Component Name Application/Function Operation/Condition/Compatibility LC75853NE LCD driver with key-matrix DTA114EK or UN2111 Key-matrix permission SW Ready on key-matrix or KRA102S ¶ SYNTHESIZER UNIT(X14-6850-XX) Ref.No. Component Name Application/Function Operation/Condition/Compatibility LC72366-9592 System MI-COM. System control TDA7461ND E-VOL.
  • Page 4 KRC-225/235/265/265S COMPONENT DESCRIPTION ¶ SYNTHESIZER UNIT(X14-6850-XX) Ref.No. Component Name Application/Function Operation/Condition/Compatibility DTC114YK or UN2214 Q260 When Q260's base becomes Hi, Q261 is turned on. or KRC107S Motor +B SW Q261 2SB1443 Works during TAPE mode. Q301 DTA144EK or UN2113 Changer reset SW When a base becomes Lo, Q301 is turned on.

  • Page 5: Microcomputer's Terminal Description

    KRC-225/235/265/265S MICROCOMPUTER'S TERMINAL DESCRIPTION ¶ Terminal Description ( IC1 : X14-6850-XX) Pin No. Pin Name Description Processing Operation Main clock resonator connection terminal TEST terminal 2 Connected to GND lines. L DATA L Data input from the LCD driver IC...
  • Page 6 KRC-225/235/265/265S MICROCOMPUTER'S TERMINAL DESCRIPTION ¶ Terminal Description ( IC1 : X14-6850-XX) Pin No. Pin Name Description Processing Operation ACC DET ACC detection input Hi : ACC ON Hi : When momentary power down detected or B.U. DET Momentary power down detection input B.U.

  • Page 7: Test Mode

    KRC-225/235/265/265S TEST MODE 1. How to enter the test mode 3. Audio adjustment • Reset the unit while holding the FM key and preset 6 • Set the volume level to -10dB (which is shown as key. "30" on the display).
  • Page 8 KRC-225/235/265/265S ADJUSTMENT Set the controls and switches as follows. BALANCE : center position BASS : center position LOUDNESS : OFF FADER : center position TREBLE : center position OUTPUT RECIEVER ALIGNMENT ITEM TAPE ALIGN FOR SETTINGS SETTINGS POINTS CASSETTE DECK SECTION...
  • Page 9 PC BOARD (Foil side view) X14-6850-xx (J74-1317-12) W101 C600 10 9 W113 (X14-6850-xx) W112 Ref. No Address R404 C400 R453 R452 D403 D409 R154 R351 D411 D370 D402 Q370 D371 W200 D401 W119 D350 D404 D400 Q350 D405 C350 R372 R405 C451 R451...
  • Page 10 PC BOARD Component side view Foil side view X16-1490-xx (J74-1298-02) X16-1490-xx (J74-1298-02) (X16-1490-xx) Ref. No Address Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 11 R350 R410 4.7K 4.7K R409 4.7K D350 R402 10 C402 0.47u50 DC CORD R408 1K (E30-4783-05) R351 R400 4.7 C400 22u6.3 KRC-225/235 (K) 1/2W R407 4.7K R406 4.7K R405 100K P-CON. R404 100K 14.4V Q353 R403 100 D408 D409 14.4V...
  • Page 12 REMO R114 22K R105 R129 22K R131 10K EQUALIZER AMPLIFIER D100 L CE L CLK ACC DET L DATA S KRC-225/235/265/265S (1/2) B.U. DET X16- L DATA L R138 S METER C102 PANEL C103 (X14-6850-XX) MODEL NAME UNIT NO. R120...
  • Page 13 DATA S ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ KRC-225/235/265/265S (2/2) CAUTION: For continued safety, replace safety critical components 2SA1037K KRA102S LA3161 2SB1565 DTA114EK DTC144EK 2SB1548 2SB1277 only with manufacturer's recommended parts (refer to parts list). KRC104S...

  • Page 14: Exploded View(Mechanism)

    KRC-225/235/265/265S EXPLODED VIEW(MECHANISM) Parts with exploded numbers larger than 700 are not supplied.

  • Page 15: Exploded View(Unit)

    KRC-225/235/265/265S EXPLODED VIEW(UNIT) (X14-) (X14-) (X14-) (X14-) (X14-) CME1 (X14-) (X14-) M3x4 : N30-3004-46 (X14-) φ3x5 : N83-3005-46 (X14-) φ3x10 : N35-3010-46 φ3x8 : N80-3008-46 (X14-) φ3x20 (X14-) : N83-3020-46 φ2.6x6 (X14-) : N86-2606-46 M3x8 : N30-3008-46 Depends on the modle.
  • Page 16 KRC-225/235/265/265S EXPLODED VIEW(UNIT) φ2x6 : N80-2006-46 φ1.5 : N29-0205-04 φ2x8 (BLK) : N80-2008-45 (X16-) (X16-) (X16-) (X16-) (X16-) (X16-) (X16-) Parts with exploded numbers larger than 700 are not supplied.

  • Page 17: Parts List

    KNOB (REW) C351 CK73GB1C683K CHIP C 0.068UF 3E ✽ K25-1387-03 KNOB (AUTO,CLK) C352 C90-2602-05 ELECTRO 0.10UF 50WV 3E ✽ K25-1389-03 KNOB (FMAM,SEEK,AUD) C400 CE04CW0J220M ELECTRO 22UF 6.3WV KM1M5 indicates safety critical components. K: KRC-235 K1: KRC-225 M1: KRC-265 M5: KRC-265S...
  • Page 18 R409,410 RK73EB2E472J CHIP R 4.7K 1/4W KM1M5 R411,412 RK73EB2E101J CHIP R 100 J 1/4W KM1M5 R121,122 RK73GB2A473J CHIP R 1/10W M1M5 R413 RK73GB2A104J CHIP R 100K 1/10W KM1M5 indicates safety critical components. K: KRC-235 K1: KRC-225 M1: KRC-265 M5: KRC-265S...
  • Page 19 ANALOGUE IC Q260 UN2214 DIGITAL TRANSISTOR Q261 2SB1443 TRANSISTOR TDA7386 ANALOGUE IC M1M5 Q301 DTA144EK DIGITAL TRANSISTOR LA3161 IC(PREAMP X2) Q301 UN2113 DIGITAL TRANSISTOR 2SC2412K TRANSISTOR Q320 2SA1037K TRANSISTOR indicates safety critical components. K: KRC-235 K1: KRC-225 M1: KRC-265 M5: KRC-265S...
  • Page 20 FLAT WASHER (0.85X2) RK73GB2A563J CHIP R 1/10W T42-1025-08 MOTOR ASSY R20 ,21 RK73EB2E130J CHIP R 1/4W T31-0229-08 PLAYBACK HEAD MA3062-M ZENER DIODE LC75853NE MOS-IC DTA114EK DIGITAL TRANSISTOR KRA102S DIGITAL TRANSISTOR K: KRC-235 K1: KRC-225 M1: KRC-265 M5: KRC-265S indicates safety critical components.

  • Page 21: Specifications

    1.3kg(2.9lbs. ) 1.3kg(2.9lbs. ) 1300g 1300g 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.

This manual is also suitable for:

Krc-235Krc-265/s

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