Nad T 512 Service Manual

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CONTENTS SECTION 1 . . . . SUMMARY SECTION 2 . . . . CABINET & MAIN CHASSIS SECTION 3 . . . . ELECTRICAL SECTION 4 . . . . MECHANISM SECTION 5 . . . . REPLACEMENT PART LIST

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2-4 EXPLODED VIEWS 1. Cabinet and Main Frame Section 463 463 A48 463 463 463 463 A46 250 300 A43 283 280 452 465 465 467 467 275 A00 332 260 PBT00 NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock. A 5 4 3 2 1 BCD

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2-5 2. Packing Accessory Section BATTERY 808 PACKING SHEET 804 PACKING OPTIONAL PARTS 803 806 813 OWNER'S MANUALRF CABLE 810 CABLE SET ASS'Y 801 REMOCON 900 BOX CARTON 802 PACKING 803 811 812 PLUG ASS'Y 1WAY PLUG ASS'Y 2WAY

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3-3 Replace IC301. Refer to Front Part Check short Reconnect it. 2. µ-COM Circuit A. No Power Does Logo appear on the screen? Is oscillation of X501 normal? Are IC503 Pins 193, 80 and 81 normal? Does no DISC appear? Does Hello appear at FLD? Is P5901 connected normally? Is P5901 Pin 23 normal? The waveform on AD(00~21) of IC501 normal? Are IC301 Pins 5, 26 normal? Replace Main B/D. Check the oscillation Check short. OK Replace IC501 Check power. (Refer to power) If power is normal OK POWER ON 1 1 YES YES YES YES YES YES YES YES ANO NO NO NO NONO NONO NONO A

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B. Audio abnormal D. Open/Close abnormal Check the connection of P5901. Check IC301 Pins 3, 4. Check Audio jack. YES (If OK) YESNO NO YESYES (If OK) YESYES (If OK) YES (If OK) YES (If OK) Check MPEG_CLK Signal of MPEG part. Refer to Audio part. Refer to MPEG part. Replace B/D. Check Front. Reconnect it. Refer to SERVO part. Check the connection of MD. AUDIO ABNORMAL OPEN/CLOSE ABNORMAL C. Video abnormal Check Video jack. YES (If OK) YES (If OK) YES (If OK) Refer to Video part. Refer to MPEG part. Replace B/D. VIDEO ABNORMAL 3-4

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Power is on Does Logo appear on the screen? Does the moving picture of the DVD Disc play on the screen normally? Is MPEG data signal normal? Is error signal normal? Is MPEG data signal normal? Is Clock normal? Does the audio sound output from MPEG decoder? Does the moving picture of the video CD play on the screen normally? Does the audio sound output normally? END Check power & clock. Check CD/DVD DSP output signal. Check MPEG Decoder input signal. Check CD/DVD DSP output signal. Check MPEG Decoder input signal. Check CD/DVD DSP output signal. Check MPEG Decoder input signal. Check clock signal Check clock signal YES YES YES YESYES YES YES YES YESYES NO NONO OKOK OK OK NO NO NO NO NO 3. MPEG Circuit _ OPTION _ If included VCD function. 3-6

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3-7 NO NO NO START Does remote control work normally? Do all the buttons work normally? Check waveform of IC901 Pin 14. Check waveform of IC901 Pin 18, 19. Is Digitron on normally? LED ON? Check waveform of IC901 Pin 7. Is oscillation of X901 normal? Is waveform of IC901 Pin 21 normal? Check waveform of IC901 Pin 14. Does pulse waveform of RC901 Pin 1 appear? Is IC901 Pin 17 connected to RC901 Pin 1 ? Is RC901 Pin 2 5V? Power on. Check and replace R903,R912, R904, R905, R941, R906, R907. Solder defective parts again. Solder defective parts Replace IC901. Solder Key part. Check Power. Replace IC902. Replace IC901. Replace LED913. Replace RC901. Re-solder. Recheck Replace IC901. Complete repairing Front B/D. NO NO NO NO NO NO NO NONO YES YES YES YES YES YESYES YES YESYES YES YES YES YES YES YESCD 4. Front Circuit (Digitron & key)

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5-5 S AL LOCA.NO PART NO(LG)ABCDDESCRIPTION SPECIFICATION REMARKS C2M3 0CH1472K562OOOOCAPACITOR,CHIP[CERAMIC M/L HD 4700PF 50V K X7R(X) 1608 R/TP C2M4 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2M5 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2M6 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2M7 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2M8 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2M9 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2N1 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C2N3 0CH1223K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.022UF 50V Z Y5V(F) 1508 R/TP C2N4 0CH1225F944OOOOCAPACITOR,FIXED CERAMIC(Temp.c 2.2UF 16V 80%,-20% Y5V(F) 3216 C301 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C302 0CH1225F944OOOOCAPACITOR,FIXED CERAMIC(Temp.c 2.2UF 16V 80%,-20% Y5V(F) 3216 C303 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C304 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C305 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C306 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C307 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C308 0CE4764F638OOOOCAPACITOR,ELECTROLYTIC 47M SRA/SS 16V M FM5 TP(5) C309 0CH1225F944OOOOCAPACITOR,FIXED CERAMIC(Temp.c 2.2UF 16V 80%,-20% Y5V(F) 3216 C314 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C316 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C317 0CE4764F638OOOOCAPACITOR,ELECTROLYTIC 47M SRA/SS 16V M FM5 TP(5) C318 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C319 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C320 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C3F1 0CH1225F944OOOOCAPACITOR,FIXED CERAMIC(Temp.c 2.2UF 16V 80%,-20% Y5V(F) 3216 C3F2 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C401 0CE2264F638OOOOCAPACITOR,ELECTROLYTIC 22M SRA 16V M FM5 TP(5) C402 0CE2264F638OOOOCAPACITOR,ELECTROLYTIC 22M SRA 16V M FM5 TP(5) C403 0CE2264F638OOOOCAPACITOR,ELECTROLYTIC 22M SRA 16V M FM5 TP(5) C404 0CE2264F638OOOOCAPACITOR,ELECTROLYTIC 22M SRA 16V M FM5 TP(5) C405 0CE4764F638OOOOCAPACITOR,ELECTROLYTIC 47M SRA/SS 16V M FM5 TP(5) C406 0CN1040K948OOOOCAPACITOR,FIXED TUBULAR(High d 0.1UF D 50V 80%,-20% F(Y5V) TA C408 0CE1064F638OOOOCAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C409 0CE2274C638OOOOCAPACITOR,ELECTROLYTIC 220M SRA 6.3V M FM5 TP(5) C410 0CN2710K518OOOOCAPACITOR TUBULA(HIGH DIELE) 270P 50V K B TA26 C411 0CN1020K518OOOOCAPACITOR TUBULA(HIGH DIELE) 1000P 50V K B TA26 C412 0CN2710K518OOOOCAPACITOR TUBULA(HIGH DIELE) 270P 50V K B TA26 C413 0CE1064F638OOOOCAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C414 0CN1040K948OOOOCAPACITOR,FIXED TUBULAR(High d 0.1UF D 50V 80%,-20% F(Y5V) TA C415 0CE1064F638OOOOCAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C416 0CN1020K518OOOOCAPACITOR TUBULA(HIGH DIELE) 1000P 50V K B TA26 C417 0CN2710K518OOOOCAPACITOR TUBULA(HIGH DIELE) 270P 50V K B TA26 C418 0CN3920F668OOOOCAPACITOR TUBULA(HIGH DIELE) 3900P 16V M X TA26 C419 0CE2264F638OOOOCAPACITOR,ELECTROLYTIC 22M SRA 16V M FM5 TP(5) C420 0CN3920F668OOOOCAPACITOR TUBULA(HIGH DIELE) 3900P 16V M X TA26 C421 0CE2264F638OOOOCAPACITOR,ELECTROLYTIC 22M SRA 16V M FM5 TP(5) C422 0CE1064F638OOOOCAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C423 0CN2710K518OOOOCAPACITOR TUBULA(HIGH DIELE) 270P 50V K B TA26 C424 0CN1040K948OOOOCAPACITOR,FIXED TUBULAR(High d 0.1UF D 50V 80%,-20% F(Y5V) TA C501 0CE4764F638OOOOCAPACITOR,ELECTROLYTIC 47M SRA/SS 16V M FM5 TP(5) C503 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C504 0CE1064F638OOOOCAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C506 0CH1225F944OOOOCAPACITOR,FIXED CERAMIC(Temp.c 2.2UF 16V 80%,-20% Y5V(F) 3216 C507 0CE4764F638OOOOCAPACITOR,ELECTROLYTIC 47M SRA/SS 16V M FM5 TP(5) C508 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C509 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C510 0CH1104K942OOOOCAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP

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3-23 3-24 4. MPEG CIRCUIT DIAGRAM Optical/Coaxial out CVBS Y/Pb/Pr(Componet) Y/C(S-VHS) WAVEFORM