Difference between revisions of "Philips HPL-N"

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Philips HPL-N (view source)

Revision as of 23:22, 23 September 2021

86 bytes added ,  23:22, 23 September 2021
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→‎Durability and Repair-ability
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== Durability and Repair-ability ==
== Durability and Repair-ability ==
The mediocre plastic quality of most of the chassis means that cracks of internal plastic screw stands as well as entire cracks of the display's casing and bottom parts are extremely common, making disassembly and assembly operations quite difficult, with screws that are difficult to remove or tighten. Access to the hard-drive is convenient, requiring a single screw removal. Optical drives and floppy drives can be easily interchanged, if needed. Another advantage is that the laptop has two RAM slots, giving plenty configuration options.
Generally, mercury vapour lamps were very durable but more modern products were released with lower typical lifetimes. This is mainly due to the fact that upto the 70s, even into the early 80s, manufacturers focused on better performing lamps but this was detrimental to sales. Many installations were left as is with extremely old lamps that were still working, despite very low light outputs, since they were not turned off and repairing them cost more than leaving them as is. Also, keep in mind that electricity was very cheap at that time.


Another major plus for these models is that the TFT LCDs lamp is mounted horizontally and relatively easy to replace due to a simple mounting system that does not require only partial screen disassembly. The case's fragility is, however, a real issue with drops likely to be fatal to integrity despite the laptop's look and finish of plastic components that suggest durability. Another coomon failure point is due to internally leaking NimH batteries or the poor LVDS cable connectors that leave glitches or even cease to operate, especially on the more modern CPi models.
Compared with modern LED lamps, mercury vapour lamps fare very poorly, as they have noticeable light output and quality degradation over 10.000 hours. However, they do have advantages. Hot or cold air affects them very little and they can survive direct operation in free-standing position, meaning with the lamp suspended on wires, even for their entire operational life. Ballast can survive tens of years if properly protected against direct rain or snow exposure. A very simple circuit means that lamp servicing is straightforward and risks are similar to mains voltage operation. 125 and 250 watt lamps are very well built and they were highly popular.


== Greatest features & flaws ==
== Greatest features & flaws ==
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