Onkyo CR-305TX Service Manual
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SERVICE MANUAL
CD RECEIVER
CR-305TX
MODEL
STANDBY/ON
MEMORY FM MODE
DISPLAY
CLEAR
PHONES
Silver model
UDD,UDT
UGT,UGR,
UPP
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
TUNING/PRESET
INPUT
120V AC, 60Hz
220-230V AC, 50Hz
230-240V AC, 50Hz
ON THE
CR-305TX
Ref. No. 3723
062002
REMOTE CONTROLLER
STANDBY/ON
INPUT
TIMER
ENTER
RANDOM
CD
MEMORY REPEAT
SCROLL
MD
PLAY MODE
REPEAT
SLEEP
A.PRESENCE
VOLUME
CLOCK
CALL
MUTING
CDR
PLAY MODE REPEAT
TAPE
TUNER
PRESET
RC-421S
RC-421S

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Summary of Contents for Onkyo CR-305TX

  • Page 1 COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE...
  • Page 2: Laser Warning Label

    CR-305TX SERVICE PROCEDURES-1 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING This set employs a laser. Therefore, be sure to follow Laser Diode Properties carefully the instructions below when servicing. Material: GaAS/GaAlAs WARNING!! Wavelength: 780nm Laser output: max. 0.5mW* SERVICE WARNING : DO NOT APPROACH THE Emission Duration: continuous LASER EXIT WITH THE EYE TOO CLOSELY.
  • Page 3 CR-305TX SERVICE PROCEDURES-2 SERVICE PROCEDURES 1. Replacing the fuses This symbol located near the fuse indicates that the fuse used is show operating type, For continued protection against fire hazard, replace with same type fuse , For fuse rating, refer to the marking adjest to the symbol.
  • Page 4 CR-305TX PANEL VIEW REAR PANEL Do not connect the AC power cord (mains lead) to the wall outlet (the mains) until you have completed all the other connections including the connections on page 7, and the speaker connections on page 8.
  • Page 5: Exploded View

    CR-305X EXPLODED VIEW P901 P901 (PP type) P352 (DD,DT type) P303 P351 P302 P778 Q557 Q558 Q557A Q559 Q557B Q560 T901 P701 F901...
  • Page 6: Exploded View Parts List

    CR-305TX EXPLODED VIEW PARTS LIST-1 REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION 252157 1.25A-UL/T-237, Fuse <DD, DT> 3217210171000 FRAME FRONT F901 838130088 3TTB+8B, Self tapping screw 252083 0.4A-SE-EAW, Fuse <PP,GR, GT> 3200210996000 MAIN CHASSIS P302 2009990500 NSAS-10P0654, Socket...
  • Page 7 CR-305TX EXPLODED VIEW PARTS LIST-2 REF NO. PART NO. DESCRIPTION 7028061541010 PCB AUDIO ASSY 7028061542010 PCB SUPPLY ASSY <DD, DT> 7028061542030 PCB SUPPLY ASSY <PP> 7028061542040 PCB SUPPLY ASSY <GT,GR> 7028061543010 FRONT PCB ASSY 7028061546010 AMP BOARD ASSY 7028061544010 SPEAKER BOARD ASSY <DD>...
  • Page 8 CR-305TX EXPLODED VIEWS OF MECHANISM-1 CD MECHANISM:WSL-2130CCM NCD-170S Model No. CD Mechanism CR-305X NCD-170S CR-305TX WSL-2130CCM NCD-170S and WSL-2130CCM consist of almost same parts. ---Different parts to NCD-170S The parts which constitute NCD-170S can use it as substitution parts. Refer to "EXPLODED VIEWS OF MECHANISM-2"...
  • Page 9: Parts List

    CR-305TX EXPLODED VIEWS OF MECHANISM-2 CD MECHANISM:WSL-2130CCM (CD DRIVE UNIT) PARTS LIST REF. NO. PART NO. DESCRIPTION X2625-877-1 Motor chassis ass'y X2625-769-1 Motor gear ass'y 2626-908-01 Sled shaft 24810023 Gear (A) (S) 7621-255-15 P2 x 3, Screw 24840008 Leaf switch...
  • Page 10: Block Diagram

    CR-305TX BLOCK DIAGRAM Q403,Q404 POWER AMPLIFIER ACOUSTIC PRESENCE CONTROL Q401 INPUT SELECTOR TC9273N-007 VOLUME TAPE R425 PLAY P551 Q603,Q405 SPEAKERS MUTING Q601,Q602 PLAY AMP. MUTE +12V Q402 13 ST USA & Canadian models only CK 14 PLAY ACOUSTIC PRESENCE Excluding...
  • Page 11 CR-305TX SCHEMATIC DIAGRAMS-1 AMPLIFIER AND POWER SUPPLY SECTION P400 R401 C409 NJM4565MD C429 2.2K R403 22/16 R463 (REC) 22/16 Q403 R404 R402 2.2K Q403 NJM4565M 2.2K C419 TAPE R455 R405 R407 R443 R445 Q401 TC9273N-007 R433 C425 C423 (PLAY) R406...
  • Page 12 CR-305TX R491 To NAETC-6882 JL405B R493 Q557 560 (1W) JL405A 2SC3851-O,-Y 22.2 UDD type only (1/2W) (1/2W) Q553 21.1 2SC2235-O,-Y 20.4 21.1 Q515 R565 5.6 20.4 SPEAKERS Q509 2SA1015GR (1/2W) Q503 Q501 L551 C513 R529 2SC1622 C501 2SC1622 S-1.3C 10/16...
  • Page 13: Schematic Diagrams

    CR-305TX SCHEMATIC DIAGRAMS-2 (CD AND MICROPROCESSOR SECTION) NAETC-6883 CONNECTOR PC BOARD FOCUS GAIN ADJUST R832 R128 C119 R845 SL_P R833 0 R131 SL_M15 C106 474 R831 TDFCT SL_O16 220K C105 103 ISET17 R132 R847 R842 ATSC VCC18 4.7K Q101 LOCK19...
  • Page 14 CR-305TX NAAR-6875 CD CIRCUIT PC BOARD C352 103 3.3K R356 C351 0.47/50 C360 R361 1K C362 1K EGND PCMD VSS2 VDD1 PCMDI 42 R363 1K BCK 43 XLON BCKI 44 R736 SPOB VSS3 45 R364 1K SSTOP SPOA VDD2 46...
  • Page 15 CR-305TX PC BOARD CONNECTION DIAGRAM...
  • Page 16: Printed Circuit Board Parts List

    CR-305TX PRINTED CIRCUIT BOARD PARTS LIST-1 U1:AUDIO PC BOARD (NAAF-6874) U2:POWER SUPPLY PC BOARD (NAPS-6878) CIRCUIT NO. PART NO. DESCRIPTION CIRCUIT NO. PART NO. DESCRIPTION Q401 TC9273N-007 22241072 Q901 222780125 78M12HF Q402 22240981R2 TC9162AF Q903 222780565 78M56 Q403,Q404 NJM4565M-D 22241383R2...
  • Page 17 CR-305TX PRINTED CIRCUIT BOARD PARTS LIST-2 U3:FRONT PC BOARD (NADIS-6879) U5:SPEAKER PC BOARD (NAETC-6881) CIRCUIT NO. PART NO. DESCRIPTION CIRCUIT NO. PART NO. DESCRIPTION Coils FL Tube L551,L552 231176S S-1.3C Q751 212141 10BT-167GK Resistors Remote sensor R565,R566 453530564 5.6ohm+/-5%, 1/2W, Metal oxide...
  • Page 18 CR-305TX PRINTED CIRCUIT BOARD PARTS LIST-3 U8:CD PC BOARD (NAAR-6875) CIRCUIT NO. PART NO. DESCRIPTION CIRCUIT NO. PARTS NO. DESCRITION Resistor Q101 22241499R3 CXA1992BR R123 5210263 N06HR20KBC, Trimming resister Q102 22241247 LA6541D Sockets Q103 22240239 TA7291S JL903A 25051087 NSCT-3P874 Q180 22241302 BU1923 <PP>...
  • Page 19: Packing View

    SET FRONT PARTS LIST [NOTE] REF.NO. PART NO. DESCRIPTION REMARKS <DD> : USA & Canadian model only 6007210450000 BOX GIFT CR-305TX <PP> : European Model only 6230210504000 CUSHION SNOW EPS 29095835 Sheet 0.515 x 650 x 550 29110149 Tape 29110141...
  • Page 20 Sales & Product Planning Div. : 2-1, Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPAN Tel: 072-831-8111 Fax: 072-833-5222 ONKYO U.S.A. CORPORATION 18 Park Way, Upper Saddle River, N.J. 07458, U.S.A. Tel: 201-785-2600 Fax: 201-785-2650 E-mail: onkyo@onkyousa.com ONKYO EUROPE ELECTRONICS GmbH Industriestrasse 20, 82110 Germering, GERMANY Tel: 089-849-320 Fax: 089-849-3265 E-mail: info@onkyo.de...

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