Sallen-Key subwoofer filter schematic as a 389 KB PDF, with a source tag in the file name.

Duplicate of the Spanish lesson on CDMA and FSK, numbered 5 and 474 KB in PDF format. It covers code division multiple access and frequency shift keying, two key…

Datasheet for the ENE KB9012 embedded controller, document revision 0.9, supplied as a 3.65 MB PDF.

Nokia 6820 schematics in a small 447 KB PDF. The name gives only the model with no revision or page count, so the set may be limited and should be checked against the…

Spanish course section 3.4 on the microscope, a brief 114 KB PDF from the workshop equipment chapter of a mobile repair series. No microscope brand or model is stated.

Nokia 6200 schematic diagrams provided as a 946 KB PDF. Only the model name is given, with no board code or revision, so compare the PCB markings against the sheets.

PDF repair guide for the ASUS UX31E, catalogued under schematics. Asus repair guides typically contain block diagrams, power sequence notes, troubleshooting flowcharts…

Small 23.4 KB PDF for the 2SK2660 transistor. The 2SK designation comes from the Japanese JIS system for N-channel FETs, so the file is most likely a brief datasheet…

PDF schematic for the IBM ThinkPad R31, around 1022 KB. No board number, revision or hardware variant appears in the name, so identification rests on the model alone.

A 113 KB PDF for the 2SA1887, a PNP bipolar transistor in the JIS 2SA numbering series.

Single-component sheet for the 1SV291, saved as a 73.7 KB PDF and tagged as a schematic.

Repair guide in PDF form for the ASUS EeeBook E402SA notebook, stored in a 761 KB RAR and catalogued alongside schematics.

Schematic set for the LG B2050 mobile phone in a 709 KB PDF. These drawings let a technician follow the charging and battery circuits, trace power rails, and check…

Circuit diagram set for the Lenovo ThinkPad E390, delivered as a 1.49 MB PDF. No board number or revision appears in the name, so check the title block inside against…

Spanish document about coils, the file name meaning inductors, a 1.17 MB PDF. No device or board is mentioned, so it is general material on how inductors work, how they…

Schematic package for the Nokia 6600 smartphone, presented as a 3.25 MB PDF. The diagrams cover the circuitry that a repair technician needs for board-level work: power…

Repair guide in PDF for the ASUS K43L laptop, listed under schematics. The name gives no revision, so check which board versions it covers.

Schematic diagram set for the Alcatel One Touch OT-710 handset, packed as a 524 KB RAR archive.

Circuit diagram for the Samsung GT-S7500, provided as a 4.66 MB PDF, with no board revision stated.

Circuit diagram for the Samsung SM-S5303 handset, provided as a 2.73 MB PDF. The name gives no board number or revision.

Nokia 6070 schematics in a 1.03 MB PDF document. The name identifies the model but provides no board version or revision details.

Very small at 26.8 KB, this PDF is identified only as 2SC4826, a JIS transistor code in which 2SC marks an NPN type.

Preamplifier schematic, the file name being the Romanian word for preamp, delivered as a 574 KB PDF with no model or brand stated.

Schematic for the HP ProBook 440 G4 built on Quanta board DA0X81MB6E0, project X81, revision E.

Repair guide in PDF for the ASUS Q552UB notebook, stored in a compact 1.04 MB RAR archive and indexed under schematics.

Combined schematic for the Nokia 6610 and 7210 phones, in an 816 KB PDF; the name uses the word skemat for schematic.

Service schematic for the Nokia 6120 mobile phone, supplied as a 788 KB PDF. The name gives no board revision or issue number, so compare the diagram against the PCB…

Spanish training PDF on identifying the parts of a smartphone, describing the main components and modules found inside a typical handset.

Lenovo A516 phone schematic diagram and service manual, supplied in a 548 KB RAR archive.

Schematic in PDF format for the Foxconn G31MX desktop motherboard, an Intel G31 chipset board, catalogued with the ECS brand tag.

Nokia 1255 schematics in a compact 413 KB PDF. The name lists only the model, with no board code or version, so treat it as a general service reference for this handset.

Foxconn-designed Lenovo laptop schematic identified by the project name S04, with no model number or revision stated.

Repair guide in PDF form for the ASUS X541UV notebook, packed into an 819 KB RAR and indexed under schematics.

Schematic drawings for the Nokia 2600 phone, a 1.03 MB PDF whose name ends in 1, hinting that it may be the first file of a split set.

Schematic diagram set for the Nokia 2280 phone, stored as a 926 KB PDF. No board revision or version is stated in the name.

Schematic for the Sony MBX-202 motherboard under ODM project code M790, packed as a 777 KB RAR archive.

Repair guide in PDF format for the ASUS X540LJ, 849 KB, catalogued with schematics. ASUS repair guides of this kind usually summarise the power-up sequence, key voltage…

Schematic set for the Xiaomi Mi 5s Plus, codename natrium, compressed into an 869 KB 7-Zip archive. Unpack it with any 7z-capable tool to view the circuit pages.

Service schematic for the Samsung M120 mobile phone, supplied as a 279 KB PDF. The name gives no board revision, so compare the layout against the handset before…

Nokia E61 service schematic supplied as a PDF of 317 KB; the trailing number 2 in the name suggests it is a second part or an alternate version of the diagram set rather…