Onkyo CR-305X SCHEMATIC DIAGRAM (AMPLIFIER SECTION)

CR-305X

A B C D E F G

SCHEMATIC DIAGRAM (AMPLIFIER SECTION)

P34

5-G

P34 3-G

P34

5-G

P30

1-H

P30 2-H

P34

3-G

P33

4-C

P29

5-B

P29

5-A

CR-305X

Contents

Main CD RECEIVER MODEL CR-305X TABLE OF CONTENTS Ref.NO.3654 082000 Silver models CAUTION ON REPLACEMENT OF OPTICAL PICKUP SPECIFICATIONS AMPLIFIER CD PLAYER TUNER PROTECTION OF EYES FROM LASER BEAM DURING SERVICING CR-305X WARNING!! Laser Diode Properties LASER WARNING LABEL SERVICE PROCEDURE 1. Replacing the fuses Bottom side 3. Safety-check out 2. To initialize the unit FRONT PANEL VIEW Asian and European models U.S. and Canadian models REAR PANEL VIEW REMOTE CONTROLLER : U Enables you to select the PRESET stations. Enables you to mute the sound temporarily. W MICROPROCESSOR CONNECTION DIAGRAM KEY SWITCH Q701 MICROPROCESSOR MPD78045FGF-119-3B9 RI C703 MICR OPR OCESSOR TERMINAL DESCRIPTION IC BLOCK DIAGRAM AND DESCRIPTIONS Q101:CXA1992BR (RF Signal Processing Servo Amplifier) Block Diagram Terminal description Q301:CXD2589Q (CD Digital Signal Processor) Bloch Diagram Terminal description Q401:TC9273N-007 (Analog function switch) Q402:TC9162AF Analog function switch 15 16 Q102:LA6541D (4-channel ridge Driver for Compact Dizcs) Q180:BU1923 (RDS Decoder( MUX VREF VDD1 Truth table A Y L H H L 28 6 7 Q751 : 10BT-167GK (FL TUBE) CD MECHANISM EXPLODEE VIEW(1) CD MECHANISM EXPLODEE VIEW(2) pickup drive unit The mechanical parts with no part number in the exploded views are not supplied. REPLACEMENT OF OPIAL PICKUP CHASSIS EXPLODED VIEW PARTS LIST (Fig-3) (2) CD Mechanism (Fig2) CHASSIS EXPLODED VIEW WIRING VIEW BLOCK DIAGRAM AC INPUT P33 CD MACHANISM PRINTED CIRCUIT BOARD VIEW PARTS LIST SCHEMATIC DIAGRAM (AMPLIFIER SECTION) PRINTED CIRCUIT BOARD VIEW 1 SCHEMATIC DIAGRAM (CD & MICROPROCESSOR SECTION) PRINTED CIRCUIT BOARD VIEW 2 U3 U8 PRINTED CIRCUIT BOARD VIEW 3 U4 U8 U9 39 40 CD ADJUSTMENT PROCEDURES CLOCK ADJUSTMENT PROCEDURES Display reqency counter F 12 ASSEMBLING OF PAD Pad and Pad(S) are combined. Pad Pad(s) Completed bottom view Pad(S) is folded. Pad is folded.