Nad L 55 Service Manual 2
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Extracted text from Nad L 55 Service Manual 2 (Ocr-read)
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SERVICE MANUAL L55 DVD/VIDEO CD/CDPLAYER DVD/VIDEO CD/CD PLAYER L55
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1-2
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1-3 PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURERS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM A.C. LINE SHOCK. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : FIRE & SHOCK HAZARD 1. BE SURE THAT ALL COMPONENTS ARE POSITIONED INSUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANSPORTED TO AND FROM THE REPAIR SHOP. 2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED. 3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD SOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES. 4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION TO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGED INSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS. 5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PROTRUDING METAL SURFACES MUST BE AVOIDED. 6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS. 7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C.LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HANDLE AND SCREWS) TO BE SURE THE SET IS SAFETY TO OPERATE WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLTMETER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, IN THE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD, 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT : GRAPHIC SYMBOLS SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS. 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED DANGEROUS VOLTAGE WITHIN THE PRODUCTS ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE. A.C. VOLTMETER PLACE THIS PROBE ON EACH EXPOSED METAL PART GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC 10 WATT 1500 OHM 0.15uF
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2-14 IC2A1 33P3721 RF Signal Processor IC206 DVDSP-3301 CD/DVD DSP DVD SERVO DRAM 256K x 16bit IC2M1 KA3032 SpindleMotor,LoadingMotor, Actuator Driver PICK UP DVD:A,B,C,D, FE,TE,PI,SBADDSENS,FOK,SLD_FG, MSDATO,DEFECT,DSP_SENSE SQSO,SQCK,SCOR XLAT,S_CLK,S_DATA DSP_CS,/WR,/RD DO[0:7] AO[0:5] DVD_DATA[0:7]MCK UCOM I/F MPEG I/F UCOM I/F M/D DVD/CD RF MIRR,TZC ICADDR[0:8] ICDATA[00:15] MON,MDP FDO,TDO,FMO Spindle focus,tracking,loading,sled SPINDLE_FG Load open/close(loading control) CD:A,B,C,D/E,F 4 45 3 3 3 8 6 8 8 2 4 9 16 3. RF/CD DSP/DVD DSP/DVD SERVO Block Diagram
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2-30 2-31 6. µ-com/ Expander FLASH ROM DRAM MAIN CPU EXPANDER EEPROM CPLD OPEN OPEN '00 03. 28 R10537B DVD3351ND'S Audio output is unstable Servo will not operate X501 No Power on Video output level is unstable Open, Close Error Servo will not operate FLD Error
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3-5 C2M1 0CH8107F611 CAPACITOR , CHIP [AL. E 100UF 16V M 85STD(CYL) R/TP R2A1 , R2D6 0RH0912C622 RESISTOR , CHIP 91 OHM 1 / 16 W 1608 5% D R/TP R2D7 0RH0472C622 RESISTOR , CHIP 47 1/16W 5 D.R/TP R2A6 , R2B3 0RH1001C622 RESISTOR , METAL 1KOHM 1 / 16 W 1608 5.00% D R2C2 , R2C3 0RH1001C622 RESISTOR , METAL 1KOHM 1 / 16 W 1608 5.00% D R2D0 0RH1001C622 RESISTOR , METAL 1KOHM 1 / 16 W 1608 5.00% D PMD04 6630R3S006F CONNECTOR (CIRC) GT200 LG CABLE 5PIN 2MM STRAIG R201 ~ R204 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R239 ~ R242 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R244 , R278 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R279 , R2A5 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R2A9 , R2B2 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R2C6 , R2C7 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R2D1 , R2D4 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R2D5 , R2E6 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP C240 , C2A2 0CH1222K562 CAPACITOR , CHIP[CERAM 2200PF 50V K X7R(X) 1608 R/TP C2C1 ~ C2C3 0CH1222K562 CAPACITOR , CHIP[CERAM 2200PF 50V K X7R(X) 1608 R/TP C201 , C224 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C226 ~ C228 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C238 , C239 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C242 , C245 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C255 , C2A0 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C2A1 , C2A3 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C2A5 , C2A8 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C2B8 , C2B9 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C2C5 , C2D0 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C2D6 , C2D7 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C2M8 0CH1104K942 CAPACITOR , CHIP [CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP R219 , R220 0RH1002C622 RESISTOR , CHIP 10K 1/16W 5 D.R/TP R2A0 , R2N8 0RH1002C622 RESISTOR , CHIP 10K 1/16W 5 D.R/TP R2Q1 0RH1002C622 RESISTOR , CHIP 10K 1/16W 5 D.R/TP IC201 0IHY258010C IC , HYUNDAI GDC25D801D 208 QFP BK DSP+SERV PMD02 6630R-FB02W CONNECTOR (CIRC) , FFC 04-6232-123-008-800 ELCO 23PIN IC301 0ICU410000A IC , C-CUBE ZIVA4.1 QFP BK MPEG DECORDER IC302 0IGS721616C IC , LG SEMICONDUCTOR GM72V161621ET-7 50TSOP TP 16MS IC371 0ISH205000A IC , SHARP PQ20WZ5U 20WZ51 TP REGULATOR V X301 6202R-BL01A CRYSTAL , SMD -49/SM5H KONY CHIP 27MHZ 20P L306 6200HJC102A FILTER(CIRC) , EMI HB-1M2012-102JT CERATECH TP 3K R351 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R3K1 0RH0000C622 RESISTOR , CHIP 0 1/16W 5 D.R/TP R315 ~ R322 0RH0332C622 RESISTOR , CHIP 33 1/16W 5 D.R/TP R326 0RH0332C622 RESISTOR , CHIP 33 1/16W 5 D.R/TP R334 , R335 0RH1000C622 RESISTOR , CHIP 100 1/16W 5 D.R/TP R302 0RH1001C622 RESISTOR , METAL 1KOHM 1 / 16 W 1608 5.00% D R306 , R307 0RH1002C622 RESISTOR , CHIP 10K 1/16W 5 D.R/TP R309 , R311 0RH1002C622 RESISTOR , CHIP 10K 1/16W 5 D.R/TP R313 , R371 0RH1002C622 RESISTOR , CHIP 10K 1/16W 5 D.R/TP R340 0RH1181C422 RESISTOR , CHIP 1.18K OHM 1 / 16 W 1608 1% D R R373 0RH3901C622 RESISTOR , CHIP 3.9K 1/16W 5 D.R/TP R303 0RH4701C622 RESISTOR , CHIP 4.7K 1/16W 5 D.R/TP R372 0RH7501C622 RESISTOR , CHIP 7.5K 1/16W 5 D.R/TP C335 , C336 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C371 , C380 0CH1104K942 CAPACITOR , CHIP[CERAM 0.1UF 50V Z Y5V(F) 1508 R/TP C375 0CH8107F611 CAPACITOR , CHIP [AL. E 100UF 16V M 85STD(CYL) R/TP LOAD No. PART No. DESCRIPTIONREMARKS