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NAD T515AH Service Manual

Manual is about: dvd video player

Summary of T515AH

  • Page 1

    Ser vice manual ser vice manual t515ah/ t515aht models : t515ah/t515aht ser vice manual © nad 2007 nad electronics international toronto t515ah/t515aht dvd video pla yer t515ah/t515aht dvd video pl a yer dvd video player.

  • Page 2

    Contents section 1 . . . .Summary section 2 . . . .Cabinet & main chassis section 3 . . . .Electrical section 4 . . . .Replacement parts list.

  • Page 3: Section 1

    Section 1 summary contents product safety servicing guidelines for video products ........................... 1-3 servicing precautions .................................................................................................. 1-4 • general servicing precautions • insulation checking prodedu...

  • Page 4

    1-3 caution : do not attempt to modify this product in any way, never perform customized installations without manufac- turer’s 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 shoul...

  • Page 5: Servicing Precautions

    1-4 servicing precautions caution : before servicing the dvd covered by this service data and its supplements and addends, read and follow the safety precautions. Note : if unforeseen circum- stances create conflict between the following servicing pre- cautions and any of the safety precautions in t...

  • Page 6

    1-5 service information for eeprom power on dvd logo status (no disk status) remotecontrol pause key-->1-->4-->7-->2 in order. Press number 0~9, press charater a~f (1~6 for a while) use arrow key ( ) to move to approprite position and make changes press pause key once change will be applied when pow...

  • Page 7: Specifications

    1-6 specifications • general power requirements power requirements: ac 120v, 60 hz ntsc region 1, 200-240 50/60 hz pal region 2 power consumption 10 w dimensions (approx.) 435 x 45 x 250 mm (w x h x d) with feet and rca plugs weight (approx.) 2 kg (4.4 lb) operating temperature 5 °c to 35 °c (41 °f ...

  • Page 8: Section 2

    2-1 2-1 section 2 cabinet & main chassis contents exploded views .....................................................................................................................2-2 1. Cabinet and main frame section ...................................................................................

  • Page 9: Exploded Views

    2-2 exploded views 1. Cabinet and main frame section a42 a43 a49 a47 a00 a44 a46 283 280 452 452 cn902 p101 cable90 463 465 465 463 463 250 463 463 467 260 261 261 300 320 463 notes) the exclamation point within an equilateral triangle is intended to alert the service personnel to the presence of im...

  • Page 10

    2-3 2. Deck mechanism section(dp-10) 001 002 003 020 439 018 013 017 015b 015a 440 019 012 015 012 432 030 010 439 431 435 021 430 024 025 036 012a 012a 026 016 435 014 a01 a02 a03 a00

  • Page 11

    2-4 3. Packing accessory section battery 808 packing sheet 804 packing optional parts 803 806 820 owner’s manual rf cable 810 cable set ass’y 801 remocon 900 box carton 802 packing 803 811 812 plug ass’y 1way(yellow) plug ass’y 1way(black) plug ass’y 2way disc 832.

  • Page 12: Section 3

    3-1 section 3 electrical contents electrical troubleshooting guide ......................................................................3-2 1. Power check flow............................................................................................................3-2 2. System operation flow ......

  • Page 13

    3-2 electrical troubleshooting guide 1. Power check flow no 3.4va. No 3.4va is 3.4va section working? Is 3.4v present at emitter of q121? Replace q121. Replace ic101. Is there a dc voltage at cathode of d105 or d107? Check fr101 no 5v is 3.4va section working? Replace q126. Is 5.6v present at collec...

  • Page 14

    3-3 2. System operation flow no no no yes no yes yes yes power on 1. 186 cpu initializes servo,dsp & risc registers 2. Write risc code to sdram 3. Reset risc show logo tray closed ? Tray close to closed position sled at inner side ? Sled moves to inner position 1. Judge whether have disc and disc ty...

  • Page 15

    3-4 3. Test & debug flow test check the ac voltage power pcba(110v or 220v) yes switch on the power pcba yes is the dc voltage outputs ok? (5v, 3.3v, 12v, 5.6v motor) yes make sure the main pcba don't short on vccs and switch it on. Yes is 3.3v outputs normal on main pcba? Yes connect to pc rs232 ca...

  • Page 16

    3-5 no no yes yes yes yes yes yes yes yes yes no no no no no no no a reset or power on. Flash memory operates properly? Show logo? Does tray move inside when it is not at closed position? B check connection lines between flash & zr336888 and the flash access time whether is suitable or not. Sdram wo...

  • Page 17

    3-6 b motor driver mute pin is high? Does the sled move to inner side when it is at outter position? Do not put in disc and tray close. Optical lens has movements for searching focus? C no no yes yes yes yes yes yes check the connection line of mute signal. No is sled_s dc level higher than 1.65v? C...

  • Page 18

    3-7 c ld_dvd or ld_cd output properly? Laser turns on when reading disc? Put disc in? Disc id is correct? Does spindle rotate? D no no no no yes yes yes yes yes yes check the laser power circuit on zr36888 and connecting to power transistor. No collector voltage of power transistor is ok? Check the ...

  • Page 19

    3-8 d proper signals on a,b,c,d of zr36888 focus on ok? Track on ok? Disc is play ? E no no no yes yes yes yes yes check connections between zr36888 and pick-up head. No check fe signal on zr36888 yes check the focus_s connection on zr36888 and motor driver. No check focus_s signal on zr36888 yes ye...

  • Page 20

    3-9 e audio dac received correct data stream? Normal audio output when disc playback? Normal ir.Vfd & front panel key functions? Test end no no yes yes yes yes check connection between zr36888 & audio dac. No normal audio dac out? Yes check the related circuit of audio dac. No check audio filter, am...

  • Page 22

    3-11 details and waveforms on system test and debugging 1. System 27mhz clock, reset signal 1) zr36882 main clock is at 27mh(x601) fig 1-1 3.1v,27mhz 2) zr3682 reset is low active fig 1-2 reset time 3.3va pwr_ctl reset.

  • Page 23

    3-12 2. Sdram clock 1) sdram clock is at 143mhz fig 2-1 ic603 pin38 clk=143mhz,vp-p=3.3v 3. Tray open/close signal 1) tray open/close waveform fig 3-1 open open close close lm- lm+.

  • Page 24

    3-13 2) tray open waveform fig 3-2 3) tray close waveform fig 3-3 open close lm- lm+ open close lm- lm+.

  • Page 25

    3-14 4. Sled control related signal(no disc condition) fig 4-1 5. Lens control related signal(no disc condition) fig 5-1 focus_s focus+ focus- sled_s drvsb sled+ sled-.

  • Page 26

    3-15 6. Laser power control related signal(no disc condition) fig 6-1 7. Disc type judgement waveform fig 7-1(dvd) dclk = 128mhz, vp-p=2.2, vmax=2.7v fact+ fe sbad vr_cd dvd_ld cd_ld.

  • Page 27

    3-16 fig 7-2 (dvd) fig 7-3 (cd) fact+ fact+ fe fe sbad sbad.

  • Page 28

    3-17 fig 7-4 (cd) 8. Focus on waveform fig 8-1 (dvd) fe foso fact+ fact- fact+ fe sbad.

  • Page 29

    3-18 3-18 fig 8-2 (cd) 9. Spindle control waveform(no disc condition) fig 9-1 (dvd) focus fact+ spindle_s sp+ sp- fe fact-.

  • Page 30

    3-19 10. Tracking control related signal(system checking) fig 10-1 (dvd) fig 10-2 (cd) te track_s tact+ tact- te track_s tact+ tact-.

  • Page 31

    3-20 11. Rf waveform fig 11-1 12. Zr36888 audio optical and coaxial output(spdif) fig 12-1 rfo spdif.

  • Page 32

    3-21 13. Zr36888 video output waveform 1) full colorbar signal(cvbs) fig 13-1 2) y fig 13-2 jk701 pin3 jk701 pin9.

  • Page 33

    3-22 14. Audio output from audio dac 1) audio l/r fig 14-1 3) c fig 13-3 jk701 pin10 jk702 pin2, 4 1khz 0db.

  • Page 34

    3-23 2) audio related signal fig 14-2 aout0 abck alrclk.

  • Page 35: Block Diagrams

    3-24 block diagrams 1. Overall block diagram m m disc sp indl e motor load in g motor deck mechanism dvd : a ,b ,c,d ,rf cd : a, b,c ,d, e, f,rf pick up b/ p b ic 604 fl ash rom memadd[0:2 0] memrd memwr cvbs r/pr g/y ic605 at24c08a ee pro m l oad[+,-] f ocu s[+,-] t rack [+,-] m ot s p dl [+,-] sl ...

  • Page 36

    3-25 2. Power(smps) block diagram 8v 3.2v filter switching ic trans feed b. 3.4va recti f ie r(5.6v) recti f ie r(9.5v) lpf recti f ie r(14v) lpf 12v pwr ctl 5v 5.6v(m) / 5.6va recti f ie r(3.4v) lpf ac100~240v rectifier reg. T/ w.

  • Page 37

    3-26 ic201 am5869s motor dr iver dvd: a, b,c ,d, rfo cd: a ,b ,c,d , e, f,rf o sp+, sp- m/d pick up x601 ic601 zr36888 dvdplayer one chi p ope n ,c los e ,s l e d_ s,spind l e_ s, fo cus _ s ,track_ s , drvsb sp dl _sens + , 1 .8 va fact+, f a ct- tact+, t a ct- sl e d + , sl e d - load+, load- 27 m...

  • Page 38

    3-27 4. Mpeg & memory block diagram ic605 ee prom ic601 (mpeg + dsp + rf) zr36888 ic604 flas h memory (1 6 m ) video inter fa ce aud io inter fa ce ic901 led dri v e i c ic603 sdram 64 m ra ma d[00:11] ,ramc ke pclk ,r am ba,ra mcs 1 ra mdqm ,ram we ram ca s ram ra s ra mdat [00:15] x601 27mhz c _ y...

  • Page 39

    3-28 5. Video & audio block diagram ic701 video 6db amp ic702 audio da c (2ch ) ic703 (op amp) lpf&buffer cvbs comp onent (r.G.B) / (y.Pb. P r ) sup e r video (y/ c) (s y_pr_out,y_ou t ,sc_pb_ou t ) (c_y/s_y) amclk abck al r c k a/ v jack mpeg m peg audio "l" audio "r" aout3 ml.

  • Page 40

    3-29 3-30 circuit diagrams 1. Power(smps) circuit diagram important safety notice when servicing this chassis, under no cir- cumstances should the original design be modified or altered without permission from the nad electronics corporation. All components should be replaced only with types identic...

  • Page 41

    3-31 3-32 2. System(main) circuit diagram a 1 2 3 4 5 6 7 8 9 10 11 12 b c d e f g h i j k l m n o p q r s t.

  • Page 42

    3-33 3-34 a 1 2 3 4 5 6 7 8 9 10 11 12 b c d e f g h i j k l m n o p q r s t 3. Servo circuit diagram.

  • Page 43

    3-35 3-36 4. Av/jack circuit diagram a 1 2 3 4 5 6 7 8 9 10 11 12 b c d e f g h i j k l m n o p q r s t.

  • Page 45

    3-39 3-40 6. Timer circuit diagram a 1 2 3 4 5 6 7 8 9 10 11 12 b c d e f g h i j k l m n o p q r s t.

  • Page 47

    • circuit voltage chart (play) +/a (play) -/k mode condenser c686 4.89 0.00 c214 5.69 0.00 c201 4.90 0.00 c217 1.79 0.00 c208 3.25 2.37 c6e6 3.25 0.00 c223 3.25 0.00 c6b2 12.06 0.00 c6b3 5.52 0.00 c209 3.25 3.12 c6k2 4.88 0.00 c6a4 3.25 0.00 c6f7 3.26 0.00 c6j1 3.25 0.00 c6a2 3.25 0.00 c6a7 1.78 0.0...

  • Page 48

    3-45 3-46 printed circuit diagrams 1. Main p.C.Board ( top view ) ( bottom view ).

  • Page 49

    3-47 3-48 2. Key p.C.Board 3. Timer p.C.Board ( top view ) ( bottom view ) ( top view ) ( bottom view ).

  • Page 50

    3-49 3-50 4. Smps p.C.Board notes) warning notes) parts that are shaded are critical notes) with respect to risk of fire or notes) electricial shock..

  • Page 51

    Location part number description quantity 1 3300r-0547a plate 3 2 5016h-1016b magnet 3 3 4860r-0021a clamp 3 10 6850r-jw24y cable,ffc 3 12 5040r-0083a damper 2 13 4400r-0010a belt 3 14 4470r-0154a gear 3 15 4681r-a015a motor,unclassified 3 16 6871r-4067a pcb assembly 3 17 4470r-0176a gear 3 18 4974r...