Figure 6 shows that section, which include three more BSS84 MOSFETs.įigure 6 This section contains circuits for the tone generator and for the test-result LEDs. The hole in the board is for the rubber pushbutton. Contains the test-result LEDs-short, miswire, reversw, split pair- as well as the tone generator. The section of the board below the ♜ (bottom section in Figure 1 ). The cables I used in my tryout lacked shields.įigure 5 D1 corresponds to RJ-45 pins 1&2, D2 covers pins 3&6, D3 indicates the status on pins 4&5, and D4 indicates pins 7&8. While Figure 4 shows three of the five LEDs on the main unit. The same pin also connects to U2 pin 5.įigure 4 A 74HC4351D connects to the RJ-45 and selects wires on the cable under test. That seems odd to be designated U3 given that all other diodes are designated with “D.” The via between R17 and R18 runs to capacitor C1. U3 appears to be an MMBD1501A diode based an a search of the A11 marking. Devices U1 and U2 are SRV05-4 transient voltage suppressors that protect the circuits from transients and ESD on LAN cables. The eight 100 Ω resistors connect to the mux to limit current. This device most likely is used to select and push test current to the four pairs of lines from the RJ-45 connector. Moving toward the RJ-45 connector, we see a 74HC4351D 8-line mux ( Figure 4 ). Q5 (also used in other places) is a BSS84 MOSFET.įigure 3 The DC/DC converter consists of a low-dropout regulator and filtering capacitors, among other components. D11 is a BZX84 series Zener diode across the LDO's output and is in parallel with C5 and C2. A 220♟ type AHA capacitor (C5) filters the regulator's output.
U5, marked “OE HH” is a ELM1117HH or similar, a 1 A, low dropout (LDO) voltage regulator that drops the battery voltage down to 5 V. The corner of the board holds the power circuits ( Figure 3 ). The I/O pins can source and sink enough current to drive LEDs directly. It stores 2048 words in flash memory had has up to 25 I/O pins. The heart of the LANSeeker is a PIC16F722A-I/SO microcontroller from Microchip. With the case open, the single board ( Figure 2 ) is accessible.įigure 2 The main unit's PCB connects the the cable under test and to a 9 V battery. Peeling back the base unit's label ( Figure 1 ) revealed two screws, but not the third.įigure 1 Screws are located under the labels. Still, you can't open it without leaving evidence of tampering because the main unit's three screws and the remote unit's single screw are hidden under their front labels.
#Nero 2014 platinum tools driver
It's mostly a microcontroller, some LEDs, driver components, and a DC/DC converter.Īt first look, you might be tempted to assume that the LANSeeker's case snaps shut and can't be opened without damaging the case. Having recently reviewed the TP500 LANSeeker from Platinum Tools, I figured it's time to take it apart.