Sony NHF800 service manual Section Servicing Notes, Unleaded Solder

MZ-NH700/NHF800

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick- up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

•Unleaded solder melts at a temperature about 40 °C higher than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to about 350 °C.

Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful!

•Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

•Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

Providing the required system environment

System requirements

The following system environment is required in order to use the SonicStage/MD Simple Burner software for the MD Walkman.

Computer	IBM PC/AT or Compatible
	• CPU: Pentium II 400 MHz or higher (Pentium III 450 MHz or higher
	is recommended.)
	• Hard disk drive space: 200 MB or more (1.5 GB or more is
	recommended) (The amount space will vary according to Windows
	version and the number of music files stored on the hard disk.)
	• RAM: 64 MB or more (128 MB or more is recommended)
	Others
	• CD drive (capable of digital playback by WDM)
	• Sound Board
	• USB port (supports USB (previously USB 1.1))
Operating	Factory installed:
System	Windows XP Media Center Edition 2004/Windows XP Media Center
	Edition/Windows XP Professional/Windows XP Home Edition/
	Windows 2000 Professional/Windows Millennium Edition/Windows
	98 Second Edition
Display	High Color (16bit) or higher, 800 ⋅ 600 dots or better (1024 ⋅ 768 dots
	or better is recommended)
Others	• Internet access: for Web registration, EMD services and CDDB
	• Windows Media Player (version 7.0 or higher) installed for playing
	WMA files

This software is not supported by the following environments:

•OSs other than the indicated above

•Personally constructed PCs or operating systems

•An environment that is an upgrade of the original manufacturer-installed operating system

•Multi-boot environment

•Multi-monitor environment

•Macintosh

Notes

•We do not ensure trouble-free operation on all computers that satisfy the system requirements.

•The NTFS format of Windows XP/Windows 2000 Professional can be used only with the standard (factory) settings.

•We do not ensure trouble-free operation of the system suspend, sleep, or hibernation function on all computers.

•For Windows 2000 Professional users, install Service Pack 3 or later version before using the software.

OPERATION CHECK WHEN THE LID IS OPEN

In making an operation check with the MAIN Board removed from the set, short the SL894 (OPEN/CLOSE) of the MAIN Board with the solder before starting the operation check.

Note: Be sure to remove the solder used for shortcircuit after the repaire completed.

– MAIN Board (Conductor Side) –

SL894

(OPEN/CLOSE)

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