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SERVICE MANUAL
CD RECEIVER
4 200 MA0 463
KD-LH401
Area suffix
E ----------- Continental Europe
EX --------------- Central Europe
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . .
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SPECIFICATION AUDIO AMPLIFIER SECTION Maximum Power Output Front 50 W per channel Rear 50 W per channel Continuous Power Output (RMS) Front 19 W per channel into 4 Ω , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear 19 W per channel into 4 Ω , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load Impedance 4 Ω (4 Ω to 8 Ω allowance) Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz,, 1 kHz, 2.4 kHz, 6 kHz, 12 kHz Level ±10 dB Frequency Response
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SECTION 1 PRECAUTION 1.1 Safety Precautions Burrs formed during molding may be left over on some parts of the chassis. Therefore, ! pay attention to such burrs in the case of preforming repair of this system. Please use enough caution not to see the beam directly or touch it in case of an ! adjustment or operation check. (No.MA063)1-3
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1.2 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repair
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1.5 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam. procedures other than those specified here in may result in 3.CAUTION : There are no serviceable parts inside the hazardous radiation exposure. Laser Unit. Do not disassemble the Laser Unit. R
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SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MA063)
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SECTION 3 DISASSEMBLY 3.1 Main body section 3.1.1 Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower right part of the front Front panel assembly panel assembly. (2) Remove the front panel assembly. Detach button Fig.1 3.1.2 Removing the heat sink (See Fig.2) (1) From the left side of the main body, remove the two screws A and three screws B attaching the heat sink. AA B Heat sink Fig.2 (No.MA063)1-7
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3.1.3 Removing the top chassis assembly (See Figs.3 to 6) • Prior to performing the following procedures, remove the heat Bottom chassis assembly sink. Reference: Remove the front panel assembly as required. (1) From the bottom side of the main body, remove the two screws C attaching the top chassis assembly to the bottom chassis assembly. (See Fig.3.) (2) From the both and rear sides of the main body, remove the four screws D attaching the top chassis assembly to the C bottom chassis assembly.
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3.1.4 Removing the front chassis (See Figs.7 and 8) • Prior to performing the following procedure, remove the front Top chassis assembly panel assembly, heat sink and top chassis assembly. (1) From the both sides of the top chassis assembly, remove the two screws E attaching the front chassis. E Front chassis Fig.7 Top chassis assembly E Front chassis Fig.8 3.1.5 Removing the mechanism control board (See Fig.9) • Prior to performing the following procedures, remove the front Mechanism control
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3.1.6 Removing the CD mechanism assembly (See Fig.10) • Prior to performing the following procedures, remove the front Top chassis panel assembly, heat sink and top chassis assembly. G Reference: Remove the mechanism control board as required. (1) From the inside of the top chassis assembly, remove the three screws G attaching the CD mechanism assembly. (2) Take out the CD mechanism assembly from the top chas- sis. CD mechanism assembly G G Fig.10 3.1.7 Removing the main board (See Figs.11 and
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3.1.8 Removing the rear bracket (See Fig.13) • Prior to performing the following procedures, remove the front Wire Main board panel assembly, heat sink, top chassis assembly and main board. Wire Wire holder (1) From the rear side of the main board, remove the wires from the rear bracket in the direction of the arrow. (2) Remove the two screws K and screw L attaching the rear Rear bracket bracket to the main board. Slots Rear bracket K L K Fig.13 3.1.9 Removing the gear bracket unit (See Fig.14
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3.1.10 Removing the front board (See Figs.15 to 18) • Prior to performing the following procedures, remove the front panel assembly. P P Rear cover assembly (1) From the rear side of the front panel assembly, remove the four screws P attaching the rear cover assembly to the front panel assembly. (See Fig.15.) (2) Release the twelve joints c of the front panel assembly and remove the rear cover assembly. (See Fig.16.) (3) From the left side of the front panel assembly, pull out the knob in the d
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3.2 CD Mechanism section 3.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the four screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover A backward to release the two joints a. Top cover Joints a A A Fig.1 Joints a Top cover Fig.2 (No.MA063)1-13
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3.2.2 Removing the connector board Wires (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-circuit point on the pickup. B (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direction of the arrow to release the two joints b. Connector board (5)
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3.2.3 Removing the DET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) Unsolder the DET switch wire if necessary. DET switch Connector board Pickup Fig.6 Tab c DET switch DET switch wire Tab c Feed sw. holder Fig.7 (No.MA063)1-15
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3.2.4 Removing the chassis unit (See Figs.8 and 9) • Prior to performing the following procedure, remove the top Chassis unit cover and connector board. Suspension spring (L) Suspension spring (R) (1) Remove the two suspension springs (L) and (R) attaching the chassis unit to the frame. Frame CAUTION: • The shape of the suspension spring (L) and (R) are dif- ferent. Handle them with care. • When reassembling, make sure that the three shafts on the underside of the chassis unit are inserted to t
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3.2.5 Removing the clamper assembly (See Figs.10 and 11) • Prior to performing the following procedure, remove the top cover. (1) Remove the clamper arm spring. Clamper arm spring (2) Move the clamper assembly in the direction of the arrow to release the two joints d. Chassis rivet assembly Joint d Clamper assembly Joint d Fig.10 Clamper arm spring Clamper assembly Joint d Joint d Chassis rivet assembly Fig.11 (No.MA063)1-17
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3.2.6 Removing the loading / feed motor assembly (See Figs.12 and 13) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor as- sembly in the direction of the arrow to remove it from the chassis rivet assembly. (2) Disconnect the wire from the loading / feed motor assembly if necessary. CAUTION: When reassembling, connect the wire from the loading / feed motor assembly to the flame as shown
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3.2.7 Removing the pickup unit Pickup unit (See Figs.14 to 18) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from the pu. shaft. Part e (2) Remove the screw E attaching the feed sw. holder. (3) Move the part e of the pickup unit upward with the pu. shaft and the feed sw. holder, then release the joint f of the feed sw. holder in the direction of the arrow. The joint g of the pickup
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3.2.9 Removing the trigger arm Joint k (See Figs.19 and 20) • Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release Trigger arm the joint k and pull out upward. CAUTION: When reassembling, insert the part m and n of the trigger arm into the part p and q at the slot of the chassis rivet assembly respectively and join the joint k at a time. Chassis rivet assembly Fig.19 Part p Trigger
