IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, the products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such com- pliance, it is equally important to implement the following precautions when a set is being serviced.
SAFETY CHECK AFTER SERVICING Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. •...
SPECIFICATIONS DVD VIDEO PLAYER Power supply AC 110~240V, 50/60Hz(T531B, T531C) AC 120V, 60Hz(T531AH) Power consumtion Mass 3.0kg(6.6lbs) External dimensions 435 x 88 x 247 mm (W x H x D) Signal system PAL 625/50, NTSC 525/60 Laser Semiconductor laser, wavelength 650nm...
DISASSEMBLY CAUTION BEFORE STARTING SERVICING Electronic parts are susceptible to static electricity and may easily and damaged, so do not forget to take a proper grounding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw driver in servicing.
CIRCUIT BOARD DISASSEMBLY Note: Before removing the main circuit board, be sure to shortcircuit the laserdiode output land. After replacing the main circuit board, open the land after inserting the flexible connector. (Refer to Mechanism Disassembly) 1. Disassembling of Main Circuit Board and Interface Board 2.
ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) Circuit No 5V_D No VF+ or 5V_A . Is 5.2VA section working? Is 5.2VA section working? Is oscillation present at the Is oscillation present at the anode of D109? Base of Q108? No 5.2VA. Replace D109. Replace Q108.
2. µ-COM Circuit A. No Power POWER ON Does Hello appear at FLD? Is P5901 Does no DISC appear? connected normally? Reconnect it. Does Logo appear Check power. on the screen? (Refer to power) If power is normal Is P5901 Pin 23 normal? Refer to Front Part Is oscillation of waveform on A[00:21]...
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B. Audio abnormal C. Video abnormal AUDIO ABNORMAL VIDEO ABNORMAL Check Audio jack. Check Video jack. YES (If OK) YES (If OK) Check MPEG_CLK Signal Refer to Video part. of MPEG part. YES (If OK) YES (If OK) Refer to Audio part. Refer to Encoder part.
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E. Picture abnormal PICTURE ABNORMAL Check the disc. Refer to Servo part If OK Check MPEG_CLK Signal of MPEG part YES (If OK) Check DSP YES (If OK) Check MPEG YES (If OK) Replace B/D F. Disc Error DISC ERROR Check Disc YES (If OK) Refer to Servo part...
3. MPEG Circuit Power is on Does Logo appear Check power & clock. on the screen? Does the Check CD/DVD DSP output moving picture of the DVD Disc Is MPEG data signal normal? play on the screen signal. normally? Check MPEG Decoder input signal.
4. Front Circuit (Digitron & key) START Power on. Is oscillation of Check Power. LED ON? X901 normal? Check waveform Is Digitron on normally? Replace IC902. of IC901 Pin 6. Do all the Is waveform of IC901 Check waveform buttons work Pin 40 normal? of IC901 Pin 22.
5. RF/Servo Circuit CHECK POINT(General) Does signal goes "High" to IC201 Pin194 when the power is on? Does signal pulse Check "2.µ-COM Part". input to IC201 Pins 58, 59 when the power is on? Does Does Replace X301 or IC304 TTL pulse output to 33.8688MHz clock input IC201 Pins 140, 142?
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No disc Power on Check loading Part. Push Pick-up to inner track to Does tray open or close? the end by hand. Does DECK assembly is defective. PMD03 Pin 13 change (Limit sw) high to low? Pressing the open/close key repeatedly, check the voltage of IC2M1 check µ-COM Part.
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DISC IN OPEN/CLOSE Fig.3. FOCUS ERROR waveform Check Check IC2A1 Pin 11,12,13,14 the focus error moving the FOCUS ON? lens up and down. in DVD Mode (IC2A1 Pin 42) IC201 no output : Pick-up is defective. Does the TTL level change at IC201 Replace IC201.
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CHECK A Fig.5. RF waveform Check RF Eye-Pattern. Check IC2A1 Pins 5, 6, 7, 8. No signal: Pick-up is defective RF : 1.5-1.6V(IC2A1 Pin 57) Does the sawtooth waveform emit Is the eye-pattern vivid? Does the 1.6V emit? Replace IC2A1. at IC2A1 Pin 41? Replace IC201.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- with specified part number. CUMSTANCES SHOULD THE ORIGINAL DESIGN BE 1. POWER(SMPS) CIRCUIT DIAGRAM (T531B, T531C ONLY) FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode.
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2. Voltages are DC-measured with a digital voltmeter MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE NAD ELECTRONICS CORPORATION. ALL PERFORMANCE IMPROVEMENT CHANGES INTO COMPONENTS SHOULD BE REPLACED ONLY WITH THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR- LITERATURE IS PRINTED.
2. DVD DSP CIRCUIT DIAGRAM IC203 is defective. AD Converter Error - No tracking/Focus control IC204 is defective. Scratched CD Audio abnormal. TRACKING LOOP SLED LOOP WAVEFORM FOCUS LOOP SPINDLE LOOP 3-23 3-24...
3. DRIVE & RF CIRCUIT DIAGRAM Q2A1, Q2A2 are defective. IC2A2 is defective. CD/DVD LD will not be on. No fucus & tracking control. TRACKING LOOP SLED LOOP WAVEFORM FOCUS LOOP SPINDLE LOOP 3-25 3-26...
4. MPEG CIRCUIT DIAGRAM • NO 2CH AUDIO OUT • NO 2CH AUDIO OUT • NO VCD SCREEN DISPLAY. • NO CD SOUND OUT. • NO DVD SCREEN DISPLAY IC302, IC303 are defective. A/V out bad. WAVEFORM 3-27 3-28...
5. AUDIO DM CIRCUIT DIAGRAM IC403 is defective. Audio bad. Q401 is defective. 2CH Audio out bad. IC402 is defective. 2CH Audio out bad. IC401 is defective 2CH Audio out bad ’01.09.10 R10674A 2CH L SIGNAL 2CH R SIGNAL 3-29 3-30...
6. µ-COM/EXPANDER CIRCUIT DIAGRAM Servo will not operate FLASH ROM DRAM FLD Error MAIN CPU Video output level is unstable CPLD Open, Close Error EEPROM X501 No Power on Servo will not operate 3-31 3-32...
• CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.
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MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. IC402 NJM4580 0.00 0.00...
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MODE MODE MODE Emitter Base Collector PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PLAY PLAY PLAY 1.30 1.34 -21.60 -22.00 4.58 4.57 S E R V O 1.00 1.10 -22.90 -21.60 2.24 2.24 Q2M1 0.00 0.00 4.98 4.98 0.00 0.00 0.00...
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DECK MECHANISM DISASSEMBLY HOLDER CLAMP PLATE CLAMP CLAMP ASSEMBLY DISC TRAY DISC MAGNET CLAMP CLAMP UPPER (S1) (S1) HOLDER CLAMP BASE MAIN (Fig. A) EMERGENCY EJECT HOLE BASE MAIN (L1) LEVER (L1) HOLDER CLAMP BASE MAIN BOTTOM SIDE VIEW Fig. 4-1 Fig.
DECK MECHANISM ADJUSTMENT 1. Tools and Fixtures for SVC • For SVC Program Down-Load Fig.1. Printer Cable Fig.2. FFC Cable (15 pin) Fig.3. Jig Board Fig.4. Deviation Disc (0.8mm) • For T-Skew and R-Skew Adjustment Fig.5. L-Wrench(3mm) Fig.6. RCA Jack Fig.7.
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DECK MECHANISM ADJUSTMENT M E M O CURRENT PICK UP POSITION ERROR RATE SIZE SECTOR : 200145 ERROR RATE (HEXADEAMAL) 0045 0065 AVERAGE ERROR RATE Fig.11. Adjusting Screen Display 3. Adjustment Procedure 1. Insert Disc(Only Open/Close Key Pressing) 2. Wait Until the Sector Display is about 200,000 (Fig.11) 3.
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SECTION 5 REPLACEMENT PARTS LIST MODEL : A:T531B , B:T531C , C:T531AH (NAD) RUN DATE : 01.11.07 . Mechanical Section NSP : Not Service Part AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS ASSEMBLY SECTION 6721R-0322A O O O DECK ASSY,VIDEO...
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3890R-H762Q DVN4021E AA2DNN SW3-A 0.952 1 3890R-H763Z DVN4021P AA3SNN SW3-A 0.952 1 3920R-E037A O O O PACKING,CASING DVN4021N(NAD) 0.02 85 EPS 10 9 3858R-S001A O O O SHEET (MECH) LDPE 600M 630MM 0.5 VCR_DVD 534-008C O O O BATTERY AAAM(R03) 1.5V 1PAIR(LOCAL)
. Electrical Section NSP : Not Service Part AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS CAPACITOR C100 0CE1064K638 CAPACITOR,FIXED ELECTROLYTIC 10M SRA 50V M FM5 TP(5) C101 624-088L O O O CAPACITOR,DRAWING 435D SUNIL ELECTRONICS 0.1UF/2 C102 624-088L CAPACITOR,DRAWING 435D SUNIL ELECTRONICS 0.1UF/2...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS C275 0CE1064F638 O O O CAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C276 0CE1064F638 O O O CAPACITOR,ELECTROLYTIC 10M SRA 16V M FM5 TP(5) C277 0CH1225F944 O O O CAPACITOR,FIXED CERAMIC(Temp.c 2.2UF 16V 80%,-20% Y5V(F) 3216 C278 0CE1064F638...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS C305 0CH1104K942 O O O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C306 0CH1104K942 O O O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C307 0CH1104K942 O O O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C308...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS C502 0CH1104K942 O O O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C503 0CH1104K942 O O O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C504 0CH1104K942 O O O CAPACITOR,CHIP[CERAMIC M/L HD 0.1UF 50V Z Y5V(F) 1508 R/TP C506...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS D116 0DR104000AA O DIODE,RECTIFIERS RZ1040 BK SANKEN DO41 40V 30A D2A1 0DS202009CA O O O DIODE,SWITCHING DAN202K TP ROHM KOREA SOT23 80 D2A2 0DS202009CA O O O DIODE,SWITCHING DAN202K TP ROHM KOREA SOT23 80 D601 0DD133009AA DIODE,SWITCHING...
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O O O CONNECTOR (CIRC),FFC/FPC 00-6232-020-006-800 ELCO 20 PI PROGRAM IC502 6957R-015AA O O PROGRAM DV4751E LG 5LANG IC502 6957R-015BB PROGRAM DVN 4021P NAD A3 CHINA SVC TRANSISTOR Q101 0TR130050AB O TRANSISTOR KSE13005F BK SAMSUNG TO220F ST Q102 0TR319809AC O TRANSISTOR KTC3198-TP-BL (KTC1815)KEC...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS Q401 0TR126709AC O O O TRANSISTOR KTA1267-GR MINI TP KEC Q402 0TR126709AC O O O TRANSISTOR KTA1267-GR MINI TP KEC Q403 0TR319909AF O O O TRANSISTOR,BIPOLARS KTC3199-BL MINI TP KEC Q404 0TR319909AF O O O TRANSISTOR,BIPOLARS...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS R240 0RH0000C622 O O O RESISTOR,METAL GLAZED(CHIP) 0 OHM 1 / 16 W 1608 5.00% D R241 0RH0000C622 O O O RESISTOR,METAL GLAZED(CHIP) 0 OHM 1 / 16 W 1608 5.00% D R242 0RH0000C622 O O O RESISTOR,METAL GLAZED(CHIP)
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS R2N6 0RH0000C622 O O O RESISTOR,METAL GLAZED(CHIP) 0 OHM 1 / 16 W 1608 5.00% D R2N8 0RH1002C622 O O O RESISTOR,METAL GLAZED(CHIP) 10K OHM 1 / 16 W 1608 5.00% D R2N9 0RH1002C622 O O O RESISTOR,METAL GLAZED(CHIP)
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS R409 0RD8201F608 O O O RESISTOR,FIXED CARBON FILM 8.2K OHM 1/6 W 5.00% TA26 R411 0RD8201F608 O O O RESISTOR,FIXED CARBON FILM 8.2K OHM 1/6 W 5.00% TA26 R412 0RD6801F608 O O O RESISTOR,FIXED CARBON FILM 6.8K OHM 1/6 W 5.00% TA26 R413...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS R606 0RD1001F608 O O O RESISTOR,FIXED CARBON FILM 1K OHM 1/6 W 5.00% TA26 R607 0RD1001F608 O O O RESISTOR,FIXED CARBON FILM 1K OHM 1/6 W 5.00% TA26 R608 0RD1001F608 O O O RESISTOR,FIXED CARBON FILM 1K OHM 1/6 W 5.00% TA26 R609...
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AL LOCA.NO PART NO(LG) A B C DESCRIPTION SPECIFICATION REMARKS R999 0RD1002F608 O O O RESISTOR,FIXED CARBON FILM 10K OHM 1/6 W 5.00% TA26 REMOTE CONTROL RECEIVER RC901 6712R1938GA O O O REMOTE CONTROLLER RECEIVER TSOP2838WE1 TEMIC 19MM 37.9KHZ SWITCH SW601 6600R-SH02A SWITCH,SLIDE...
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