Service Manual ORDER NO. RRV1946 STEREO CD RECEIVER XC-L7 THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). Type Model Power Requirement Remarks XC-L7 KUXJ/CA ‡ AC120V CONTENTS 1. SAFETY INFORMATION ...................................... 2 2. EXPLODED VIEWS AND PARTS LIST ................ 3 3. SCHEMATIC DIAGRAM ..................................... 10 4. PCB CONNECTION DIAGRAM .......................... 26 5. PCB PARTS LIST ............................................... 38 6.
XC-L7 1. SAFETY INFORMATION This service manual is intended for qualified service technicians ; it is not meant for the casual do-ityourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
XC-L7 2. EXPLODED VIEWS AND PARTS LIST NOTES: ¶ Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. mark found on some component parts indicates the importance of the safety factor of the part. ¶ The Therefore, when replacing, be sure to use parts of identical designation. ¶ Screws adjacent to mark on the product are used for disassembly. 2.
XC-L7 2.
XC-L7 G 51 19 Refer to "2.
XC-L7 • MAIN SECTION PARTS LIST Mark No. Description Part No.
XC-L7 2.3 DISPLAY UNIT DU-L7 11 10 12 11 4 6 4 8 2 1 3 5 9 7 • DISPLAY SECTION PARTS LIST Mark No. Description 1 2 3 4 5 CD FLDP Unit CD CNB Unit CD DPKEY Unit Leg Display Button AWU7003 AWZ8988 AWZ8989 AEB7090 AAD7409 Top Button Window FL Filter Display Panel Rear Cover AAD7430 AAK7461 AEC7117 AMB7458 AMC7013 6 7 8 9 10 Part No. Mark No. 11 12 Description Screw Screw Part No.
XC-L7 2.
XC-L7 • SINGLE MECHANISM ASSY PARTS LIST Mark No. Description Part No. Lever Switch(S601) Screw Rubber Belt Motor Pulley Tray Black V DSK1003 PBA1048 PEB1193 PNW1634 PNW2455 6 7 8 9 10 Float Base Drive Gear 2 Gear Pulley Clamper Base Clamp Cam PNW2032 PNW2369 PNW2034 PNW2375 PNW2364 11 12 13 14 15 DC Motor/0.75W Float Rubber B Float Rubber G Screw Screw PXM1010 REB1287 REB1288 BPZ26P080FMC Z39 - 019 16 17 18 19 20 Screw Pinion Gear DC Motor (CARRIAGE) D.C.
1 2 3 4 XC-L7 3. SCHEMATIC DIAGRAM 3.
5 6 7 8 XC-L7 Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS AND PARTS LIST" or "PCB PARTS LIST".
1 2 3 4 XC-L7 3.
5 6 7 8 XC-L7 CN3611 A AF AMP B AF AMP REGULATOR C PLL D 5 6 7 A 8 13
1 2 3 4 XC-L7 3.
XC-L7 • WAVEFORMS OF CD MAIN UNIT Note: The encircled numbers denote measuring points in the schematic diagram. 2 TP1- Pin 1 : PLAY MODE (RF) ∗1 50T-JUMP: After switching to the pause mode, press the manual search key. ∗2 FOCUS-IN: Press the play key without loading a disc. 19 IC1301- Pin 52 : 5 IC1201- Pin 3 : Pin 3 : 8 IC1202TRACK SEARCH H : 1msec/div MODE (CADR) PLAY MODE (1kHz) (PCMD) H : 200msec/div H : 500nsec/div PLAY MODE (FODR) H : 500nsec/div 0.5Vp-p 5Vp-p 5Vp-p 1.
1 2 3 4 XC-L7 3.4 MECHANISM BOARD ASSY AND CD MAIN UNIT(1/2) SERVO MECHANISM ASSY SL (AXA7017) (FS) (FS) A (TS) (SM) (SM) PICKUP ASSY (PEA1291) 7 (FS) (TS) (CD) 5 (FS) (FS) (SM) (TS) 2.
5 6 7 8 XC-L7 SIGNAL ROUTE (CD) (FS) (TS) 2 (CD) (TS) 23 24 (SM) : SPINDLE MOTOR ROUTE :CD AUDIO SIGNAL ROUTE (CM) : CARRIAGE MOTOR ROUTE : FOCUS SERVO LOOP LINE : TRACKING SERVO LOOP LINE A 3 (TS) (CD) 4 (FS) (TS) (FS) C 2/2 5V 2.5V (FS) (FS) (CD) B 9 24 23 (TS) (TS) (CM) C 2/2 (CM) 33 (SM) C 0.01 YB 53 (CD) (CD) 0.01 YB C1322 0.
1 2 3 4 XC-L7 3.5 CD MAIN (2/2), CD KEYB1 AND CD KEYB2 UNITS C 1/2 A IC6101 PD4843B B SYSTEM CONTROL (PB) NO CONNECTION 5V (REC OUT) (PB) CN6201 C (TX) (TX) (AUX) DC 4.5V DC 4.5V -12V (AUX) (PB) A (REC OUT) D STBY : 0V ON : -12V (TX) (CD) C 1/2 DC 4.
5 6 7 8 XC-L7 SIGNAL ROUTE G : LCH AUDIO SIGNAL ROUTE CN5703 -28V (AUX) : AUX AUDIO SIGNAL ROUTE (PB) A : DECK PB SIGNAL ROUTE ATX1012 L114 (REC OUT) 5.
1 2 3 4 XC-L7 3.6 CD FLDP, CD CNB AND CD DPKEY UNITS A C 2/2 CN6801 C5712 0.047 C5711 0.047 5V C5704 0.22 C5710 0.047 100/6.
5 6 7 8 XC-L7 A CD FLDP UNIT S5755 : CHARACTER S5756 : MENU S5757 : CANCEL ( ) S5758 : − ( ) S5759 : + ( ) S5760 : SET FM/AM/STATION CD DPKEY UNIT S5751 : STANDBY/ON S5752 : FUNCTION (PLAY) S5753 : VOLUME S5754 : DC -22V C5722 1/50 C5721 1/50 DC -22V B GND DISP GND DISP C DPKEY UNIT H CD (AWZ8989) D 5 6 7 F H 8 21
1 2 3 4 XC-L7 3.7 POWER AF AND POWER HP UNITS A C 2/2 CN6102 L+R DC 0V DC 4.5V (AUX) (TX) (AUX) (TX) (CD) (PB) B DC 0V (REC OUT) (CD) (PB) DC4.5V DC 4.5V 5V (REC OUT) (TX) CN6103 (CD) C 2/2 C FUNCTION VR TONE SUBWOOFER LEVEL CONT. (PB) DC 4.
5 6 7 8 XC-L7 A J LPF POWER HP UNIT (AWU7006) (HP) (HP) (HP) (HP) (HP) 3.9k 3.9k B (HP) 4.5V HP AMP VRIC Vref AL 0.22 / 50 HPF 4.7k 4.7k 0.047 C AL 0.22 / 50 SIGNAL ROUTE D (TX) : LCH AUDIO SIGNAL ROUTE (AUX) (PB) (REC OUT) 5 : TUNER AUDIO SIGNAL ROUTE (CD) : AUX AUDIO SIGNAL ROUTE : DECK PB SIGNAL ROUTE : CD AUDIO SIGNAL ROUTE (HP) : DECK REC SIGNAL ROUTE : H.
1 2 3 4 XC-L7 3.8 POWER AMP, POWER TRANS AND POWER SPTB UNITS L A POWER TRANS UNIT (AWU7148) AC POWER CORD C13,C14 : 4700 / 35 29V T1 POWER TRANSFORMER ATS7216 10(F) DISPLAY at Connect : -30V Not Connect : 0V C21 100/35 10(F) REK1078 (2A 125V) -29V H1,H2 : AKR1003 B IC2,IC3 : AEK7017 (3.5A 125V) C1,C2 : 10000p/250 -58V 2.2M • NOTE FOR FUSE REPLACEMENT CAUTION - FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY.
5 6 7 8 XC-L7 SIGNAL ROUTE K : LCH AUDIO SIGNAL ROUTE POWER AMP UNIT(AWZ8990) (AUX) : AUX AUDIO SIGNAL ROUTE A : SUBWOOFER OUTPUT C 2/2 (AUX) CN6101 (AUX) FAN DRIVE ASR7007 DC 4.5V ASR7007 (AUX) STANDBY : 0V POWER ON : -29V STK401-030 SATELITE SP AMP 560 (AUX) B 10 / 50 10 / 50 RY3431 (3/3) ASR7007 82k 560 YB 0.047 10 / 50 ZA 10 / 50 ZA 82k ASR7007 RY3331 (3/3) ASR7007 SATELITE AMP STANDBY CONTROL SUBWOOFER AMP 29V OVER LOAD DET.
XC-L7 4. PCB CONNECTION DIAGRAM NOTE FOR PCB DIAGRAMS : 1. Part numbers in PCB diagrams match those in the schematic diagrams. 2. A comparison between the main parts of PCB and schematic diagrams is shown below. Symbol In PCB Diagrams Symbol In Schematic Diagrams B C E B C E Connector B C E B C SIDE A E Transistor with resistor B C E D G S D G S Field effect transistor Resistor array 3-terminal regulator 26 Capacitor Transistor B C E D G S Part Name 3.
1 2 3 4 XC-L7 4.
1 2 3 4 XC-L7 4.
5 6 7 8 XC-L7 A CN6201 A IC3901 IC3902 K CN101 B D CN6201 Q3901 Q3902 C G CN5703 (ANP7209-C) I CN3002 D SIDE A 5 6 7 C 8 29
1 2 3 4 XC-L7 A IC3601 Q3601 B C CD MAIN UNIT Q3905 Q6102 Q3903 Q6101 Q3904 IC6101 C Q6103 (ANP7209-C) D SIDE B 30 C 1 2 3 4
5 6 7 8 XC-L7 A IC1101 IC3601 B C IC1301 Q1342 Q1541 Q1544 Q6001 Q6004 D SIDE B 5 6 7 C 8 31
1 2 3 4 XC-L7 4.
1 2 3 4 XC-L7 H CD DPKEY UNIT A D CD KEYB1 UNIT F CD FLDP UNIT B SIDE B C E CD KEYB2 UNIT D (ANP7209-C) 1 2 3 D E F H 4 33
1 2 3 4 XC-L7 4.
5 6 7 8 XC-L7 C CN6103 I POWER AF UNIT A Q3041 B C CN6102 C FAN MOTOR M POWER SPTB UNIT K POWER AMP UNIT D Q51 IC53 Q61 Q52 IC31 IC62 Q71 Q72 Q53 Q62 Q73 (ANP7210-B) SIDE A 101 5 6 7 I K M 8 35
1 2 3 4 XC-L7 I A POWER AF UNIT IC3201 IC3011 IC3041 Q3532 IC3071 IC3501 Q3531 Q3533 B C M POWER SPTB UNIT (ANP7210-B) K POWER AMP UNIT SIDE B D 36 I K M 1 2 3 4
5 6 7 8 XC-L7 L POWER TRANS UNIT A J POWER HP UNIT B C Q3481 5 Q3393 Q3392 Q3712 Q3381 Q3711 Q3701 Q3731 Q3741 Q3752 D Q3391 Q3383 Q3721 Q3722 SIDE B 6 7 J K L 8 37
XC-L7 Mark No. Description Part No. 5. PCB PARTS LIST Mark No. Description Part No. NOTES: ¶Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. mark found on some component parts indicates the importance of the safety factor of the part. ¶The Therefore, when replacing, be sure to use parts of identical designation. ¶When ordering resistors, first convert resistance values into code form as shown in the following examples. Ex.
XC-L7 Mark No. Description C6220, C6226, C6242, C6256 C6225 Part No. CKSQYF223Z50 CKSQYF473Z50 RESISTORS R6280 R6413, R6416, R6418, R6906, R6909 R6401 VR6201(10kΩ) Other Resistors RD1/4PU101J RS1/8S0R0J RS1/8S470J PCP1029 RS1/10S&&&J OTHERS BN6202 4P ANTENNA TERMINAL X6202 CRYSTAL RESONATOR (456kHz) X6201 CRYSTAL RESONATOR (7.
XC-L7 Mark No. Description Part No. Mark No.
XC-L7 Mark No. Description Part No. Description Part No. CEAT100M50 CEAT1R0M50 CEYA470M10 CFTLA683J50 CKSQYB102K50 D25, D3381, D3701 D3721, D3722, D3731 D31 D11 D23 1SS254 1SS355 D2SBA20(B) D3SBA20(B) MTZJ33A C3042, C3046 C3050, C3053 C3223 C3031, C3032, C3035, C3036 CKSQYF103Z50 CKSQYF473Z50 CQMA333J50 CQMA682J50 D24 D51, D61 TH3791,TH3792 MTZJ6.
XC-L7 Mark No. L Description Part No. POWER TRANS UNIT SEMICONDUCTORS IC2, IC3 AEK7017 COILS AND FILTERS L1 ATF-151 CAPACITORS C1, C2(10000pF/AC250V) C4–C6 C7 ACG7020 CKSQYB473K50 CQMA103J50 RESISTORS R2 (2.
XC-L7 6. ADJUSTMENT 6.1 TEST MODE 6.1.
XC-L7 6.2 TUNER SECTION 6.2.1 FM TUNER SECTION • Set the mode selector to FM BAND. • Connect the wiring as shown in Fig. 1. Step No. Adjustment Title FM SG (1kHz, ± 75kHz dev.) Frequency (MHz) Level (dBµV) Reception Frequency Display Adjustment Location Specifications Adjust so that the DC voltage between the IC6201pin 20 and GND becomes at maximum level. 1 Front End Sensitivity 98 0-30 98MHz L6402 T6401 2 TUNED IND.
XC-L7 6.3 CD SECTION 6.3.1 PREPARATIONS Jigs and Measuring Instruments 8-cm DISC (With at least about 20 minutes recording) CD TEST DISC (YEDS-7) Precise screwdriver screwdriver (small) screwdriver (medium) 39 kΩ 0.001µF Ball point hexagon wrench (size: 1.5mm) GGK1002 screwdriver (large) Low-frequency oscillator Dual-trace oscilloscope (10 : 1 probe) Low pass filter (39 kΩ + 0.
XC-L7 Adjustment Locations (REAR) SIDE A CD MAIN UNIT W6102 TEST MODE Short Point W6103 ADJUSTMENT SCREW (Radial tilt direction) PICKUP ASSY TP1 (CN1102) ADJUSTMENT SCREW (Tangential tilt direction) TP1 CN1102 VR1102 (FOCUS GAIN) VR1101 (TRACK GAIN) 6 5 4 3 2 1 6. FE 5. FIN 4. VC 3. TIN 2. TE 1.
XC-L7 Check and Adjustment 1. Focus Offset Check • Test mode DC voltage 0 ± 50mV Check • None disc If not = repair CH1 (X) START CH2 (Y) Oscilloscope DC Mode V : 5mV/div H : 10mSec/div Player TP1 (CN1102) Probe(10:1) 6 4 FE VC GND CD MAIN UNIT 2.
XC-L7 3. Pickup Radial/ 1 2 Tangential Direction Tilt Adjustment 1 Test mode FOCUS servo SPDL servo TRKG servo → CLOSE → CLOSE → CLOSE 2 TEST DISC NG GGK1002 2 1 8cm DISC PLAY Remove lock tight. Eye pattern CH1 (X) CH2 (Y) Oscilloscope AC Mode V : 20mV/div H : 200nSec/div Player START OK (Smooth) TP1 (CN1102) Probe(10:1) 1 4 RF VC GND CD MAIN UNIT 4. RF Level Check Test mode FOCUS servo → CLOSE SPDL servo → CLOSE TRKG servo → CLOSE 1.2Vp-p ± 0.
XC-L7 5. Focus Servo Loop Gain Adjustment Test mode FOCUS servo → CLOSE → CLOSE SPDL servo → CLOSE TRKG servo YEDS-7 R=35mm VR1102 PLAY Lissajous Waveform CD MAIN UNIT Oscilloscope X-Y Mode X : 20mV/div Y : 5mV/div TP1 (CN1102) FE FIN VC CH2 (Y) Low-frequency oscillator 1.2kHz 1Vp-p Player Probe(10:1) 6 5 4 Probe(10:1) GND START CH1 (X) 100kΩ GND TEST DISC CD MAIN UNIT 6.
XC-L7 7. GENERAL INFORMATION 7.1 PARTS 7.1.1 IC • The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
XC-L7 ¶ Pin Function No.
XC-L7 No.
XC-L7 7 PD4843B (CD MAIN UNIT : IC6101) • SYSTEM CONTROL UCOM ¶ Pin Function No. Mark Pin Name I/O Function No. Mark Pin Name I/O Function 1 P15/ANI5 S.THERMO I A/D input for Sub-thermistor 41 P65/WR ROMUTE I MUTE request of CD R ch O 2 P16/ANI6 J/EX I Destination switch input H:J, L:EX 42 P66/WAIT LOMUTE I MUTE request of CD L ch O 3 P17/ANI7 S.
XC-L7 7.1.
XC-L7 7.2 DIAGNOSIS 7.2.
XC-L7 (2) CD MAIN UNIT, POWER AF UNIT AND FM/AM TUNER MODULE 2 3 4 5 6 7 Disassembly : 1 Assembly : 7 6 5 4 3 2 1 CN3501 CD MAIN Unit 3 5 1 ×3 POWER AF Unit FM/AM Tuner Module 6 4 ×2 2 POWER AF Unit 7 FM/AM Tuner Module Top Barrier CD Main Unit 56 ×2
XC-L7 (3) SINGLE MECHANISM ASSY AND POWER AMP UNIT 2 3 4 5 6 7 8 Disassembly : 1 Assembly : 8 7 6 5 4 3 2 1 1, 2 2 5, 6 ×4 1 Rear Panel 5 3, 4 6 Single Mechanism Assy 6 3 6 6 POWER AMP Unit 4 ×5 POWER AMP Unit 7, 8 8 7 8 ∗ Discharge C13, C14, C31 and C32 with several ohms. (Microfuse and so on will be damaged when short-circuit the circuit before discharge.) It is possible to diagnose each PCB Unit in this state.
XC-L7 7.2.
XC-L7 7.3 BLOCK DIAGRAM • POWER SUPPLY BLOCK 34 + AUXIN TONE 33 36 40 13 Power Supply for TC 1,42 LPF IC3201 (1/2) PB IN 7 11 E+5.
XC-L7 8.
XC-L7 DISPLAY UNIT DU-L7 9 REMOTE D SENSOR 0 - 5 FUNCTION (PLAY) STANDBY/ON 8 VOLUME 7 @ ! ~ = 6 SET 4 3 ¢ FM/AM/STATION DISPLAY UNIT DU-L7: Roles of common operation buttons vary depending on the input function currently selected, as follows: During Tuner Operation 4 : Frequency and station – (down) button. ¢ : Frequency and station + (up) button. SET 3 : FM/AM/STATION button. FM/AM/STATION During CD Operation 4 : Reverse track search button. ¢ : Forward track search button.
XC-L7 ~ 2 button ! CANCEL button @ MENU button DIRECT PLAY ¶ Roles of buttons 3, 4, 5, 6, and ~ vary depending on the input function currently selected, as follows: 1 MENU ! ~ = CANCEL 7 4 - 3 ¡ @ 4 5 6 ¢ SET 1 AUX SOUND POWER : Station + (up) button DISPLAY 7 VOLUME : Station - (down) button 8 ¶¶D : Frequency up button ROMOTE CONTROL UNIT 0 During Tuner Operation : Frequency down button 9 REMOTE CONTROL UNIT During CD Operation 1 CD Play/Pause button : Forward track se
XC-L7 • SPECIFICATIONS Stereo CD Receiver: XC-L7 Compact Disc Section Type .......................... Compact disc digital audio system Usable discs ............................................. Compact discs Channels .......................................................... 2 (stereo) Frequency Response .................................. 4 Hz–20 kHz Signal-to-Noise Ratio ................................ 110 dB (EIAJ) Wow and Flutter ............................ Limit of measurement (0.