Manuale d’uso / di manutenzione del prodotto L400 del fabbricante Dell
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www .dell.com Dell™ Latitu de™ L400 SERVICE MANUAL.
Notes , Notice s, an d Cautio ns Thro ughout t his guide, bloc ks of te xt ma y be ac companied b y an i con and prin ted in bold type or in it al ic t y pe.
v Contents Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Prep arin g to Wor k Insid e Yo ur Com pu ter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Screw Identif ication and Ti ghtening .
vi Figu re 6 . Hard- Disk Dr ive A sse mbly R emo val . . . . . . . . . . . . . . . . . . . . . . . 7 Figu re 7 . Keyb oar d Be zel Rem oval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 8 . Displa y As semb ly R emov al . .
suppor t.del l.co m Dell L atitude L40 0 Ser vice Manu al 1 Dell™ Latitude™ L400 Service Manual Th is manual pro vides instr uctions f or removi ng and replacing field-r eplaceable components, assemblies, and subassemblie s in your Dell Latitu de com puter .
2 Dell Lati tude L40 0 Se r vi ce Manu al R e commended T ools Most of the procedures in this manual require the use of one or more of th e f ollo wing tools: • #0 and #1 magnetiz ed Phillips- head .
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 3 Fi gure 2. M ain Battery Assembly R emoval 9. Ground y ourself b y touc hing the unpainted metal surface of an I/ O connector on the bac k of the computer . NOT ICE: While you wo rk, per iodical ly touch the I/ O pane l to dissipa te any s tatic ele ctricit y that mi ght harm compone nts.
4 Dell Lati tude L40 0 Se r vi ce Manu al When you are remo ving and replacing components, photocop y the T able 1 placement mat as a tool to lay out and k eep trac k of the component scre ws.
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 5 ZIF Connectors Some of the computer ’ s interf ace connectors are z ero inserti on fo rce (ZIF) connectors. The se connectors are not remov able, but the y must be released to disc onnect a cab le from them (see Figure 4).
6 Dell Lati tude L40 0 Se r vi ce Manu al R e moving Fi eld-R eplaceable P arts and Assemblies Fi gure 5. Exploded View—Computer display assemb ly keyb oa r d palm rest assemb ly sy stem bo ard asse.
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 7 T he foll owing subsec tions pro vide instr uctions f or remov ing and replacin g field-repl aceable part s and assembl ies.
8 Dell Lati tude L40 0 Se r vi ce Manu al Ke y b o a r d B e z e l Figure 7. K eyboard Bezel Removal NOTICE: T o avoid damagi ng t he syst em b oard, you mu st rem ove the main batte ry before you service the computer . NOTICE: T o avoid dama ging the m icrophon e, d o not put a ny objects into the microp hone hole (s ee Fig ure 7).
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 9 Display Assembly Fi gure 8. D isplay Assembly Removal NOTICE: T o avoid dam aging the syste m board, you mus t remove the battery before you servic e the computer . 1 . Re mov e the ke yboard bez el.
1 0 Dell Latit ude L4 00 Ser vice M anual 6. T urn the c omputer right -side up. 7 . Open the displ ay . 8. R emov e the lef t and ri ght hinge c ov ers. NO TE: When replacing the displ ay assembly , the lef t hinge cov er must go o ver the lef t hinge and the right hin ge cov er m ust go ov er the right hinge.
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 1 1 7 . R einstall the two M2 x 4-mm scre ws in t he bac k of t he computer that secure th e display asse mbly to the bac k of the bot tom case. 8. Tighten the two scre ws that you ins t alled in step 6.
1 2 Dell Latit ude L4 00 Ser vice M anual NOTICE: T o avoid damagi ng t he syst em b oard, you mu st rem ove the main batte ry before you service the computer .
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 1 3 T o replace the displa y-assembl y latc h, perfor m the foll owing steps: 1 . Carefu lly place the latc h spring o ver t he post on the displa y-assembly t op co ver . Y ou may need to use a small flat- blade scre wdriv er to place the spring o ver the post.
1 4 Dell Latit ude L4 00 Ser vice M anual 2. R emov e the ke yboard bez el. 3. R emov e the displa y assembly . 4. R emov e the displa y assembly bez el. 5. R emov e the four M2 x 3.5-mm sc rews on the lef t and right sides of the displa y assembly that secure the LCD panel t o the top cov er (see Figu re 1 1).
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 1 5 b. Lo wer the bot tom end of the LCD panel into the top co ver , making sure the LCD fle x cable lines up with the openi ng that is to the right of the lef t hinge.
1 6 Dell Latit ude L4 00 Ser vice M anual Ke y b o a r d A s s e m b l y Figure 12. K eyboard Assembly Removal T o remo ve t he k eyboar d assembly , perf orm the f ollo wing steps . NOTICE: T o avoid da magin g the syste m board, y ou must rem ove the main batt ery before you servic e the computer .
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 1 7 NOT ICE: The key caps on the k eyboard are fragile, easily dislodged, and time - consu ming to replace. Be carefu l when rem oving and handli ng the k eyboard. 6. R emov e the ke yboard a ssembly .
1 8 Dell Latit ude L4 00 Ser vice M anual Memory Module Figure 13. Memory Module Removal NOTICE: T o avoid damagi ng t he syst em b oard, you mu st rem ove the main batte ry before you service the computer . 1 . R emov e the ke yboard bez el. 2. R emov e the ke yboard assembly .
support .dell .com Dell Latitude L 40 0 Ser v ice Ma nual 1 9 3. Piv ot the memor y module down unt il it clic ks into place. If y ou do not hear a clic k as eac h end of the memor y module snaps into the tabs, remov e the memor y m odule and reinstall it (see Figure 1 3).
20 Dell Lati tude L40 0 Ser vice Ma nual 7 . R emove th e four blac k M2 x 4-mm screws across the top of the computer (see Figu re 1 5). Figure 15. R emovi ng the Palmrest Assembl y T op Screws 8.
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 21 T o replace the palmres t assembly , perf orm the foll owing st eps: 1 . Place the palmres t assembly on the bot tom assembly .
22 Dell Lati tude L40 0 Ser vice Ma nual 2. R emov e the displa y assembly . 3. R emov e the ke yboard assembly . 4. R emov e the palmrest assembly . 5. R emov e the three M2 x 3.5-mm screws tha t secure the touc h pad assembly t o the palmr est assembly (see Figure 16 ).
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 23 R eserve Battery Figure 18. R eserve Battery Removal NOT ICE: The reserve battery provid es power to the computer's RTC and nonvolat ile random -access me mory (NVR AM) when th e com- puter is turned off.
24 Dell Lati tude L40 0 Ser vice Ma nual Mode m Fi gure 19. Modem Removal 1 . R emov e the ke yboard bez el. 2. R emov e the displa y assembly . 3. R emov e the ke yboard assembly .
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 25 T o replace the modem, perf orm the follo w ing steps: 1 . Connect the modem cable to the connect or on the syst em board. 2. Align t he connector on the bot tom of the modem with the co nnector on the sy stem board, and careful ly press the modem onto the sys tem board.
26 Dell Lati tude L40 0 Ser vice Ma nual 4. R emov e the palmrest assembly . 5. Carefull y disconnect the f an wire connector from the syst em board (see Figure 20) . T he male connector on the f an w ire is k ey ed to fit in to the f emale connector one w ay only .
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 27 Speaker Figure 21. Speaker Remova l 1 . Re mov e the ke yboard bez el. 2. R emov e the displa y assembly .
28 Dell Lati tude L40 0 Ser vice Ma nual NOT ICE: The audio EMI shield is att ached to the USB conn ector hous ing wi th two - side d ta pe. T o avoid bend ing the a udio E MI shie ld, care must be tak en when separating the audio EMI shield from t he USB connect or housing .
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 29 7 . R einstall the palmrest assembly . 8. R einstall the ke yboard assembly . 9. R einstall the displa y assembly . 1 0. Rei nstall the ke yboard bez el. System B oard Assemb ly 6 Figure 22.
30 Dell Lati tude L40 0 Ser vice Ma nual NOTICE: T o avoid damagi ng t he syst em b oard, you mu st rem ove the main batte ry before you service the computer . NOT ICE : The proce ssor is not r eplacea ble. Do not attempt to remove the th erma l cool ing soluti on.
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 31 1 3. Remo ve the modem retainer brac ket fr om the bot tom case assembly . 1 4. Disconnect the speak er wire from the connector on the sy stem board assembly . 1 5. Disconnect the fan wire fr om the connector on the sy stem board assembly .
32 Dell Lati tude L40 0 Ser vice Ma nual One of the M2 x 3.5-mm scre ws passes t hrough the h ard-disk dri ve EMI clip (see Figure 23) . 9. R einstall the audio EMI shield. a. Carefull y position the audio EMI shiel d so the section with the two-sided tape is ov er the USB connector housing.
support .dell .com Dell Latitude L4 0 0 Ser v ice Ma nual 33 1 . Re mov e the ke yboard bez el. 2. R emov e the displa y assembly . 3. Remo ve the ke yboard. 4. R emov e the palmrest assembly . 5. Remo ve the sy stem board. NOTICE: The tabs on the release button are plast ic.
34 Dell Lati tude L40 0 Ser vice Ma nual T o replace the APR doc king doors, pe rfo rm the f ollow ing steps. NO TE: On the under side of the doors, a small F is printed on the front door and a smal l B is printed on the bac k door .
Index 1 Inde x A APR docking doors removal , 33 B bottom assembly components, 22 illus trated, 22 D display ass embly bezel remov al, 11 hinge removal, 15 latch re mova l, 12 rem oval, 9 F fan r emova.
2 Dell Lati tude L40 0 Se r vi ce Manu al R rese rve batte ry re mov al, 23 S screw ident ificatio n and tigh tening, 3 speaker r emoval, 27 system board assembly removal , 29 T tools, 2 touch pad rem.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Dell L400 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Dell L400 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Dell L400 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Dell L400 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Dell L400, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Dell L400.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Dell L400. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Dell L400 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
