Sony cdx gt 250 m service manual
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Extracted text from sony cdx gt 250 m service manual (Ocr-read)
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2 CDX-GT250M If the optical pick-up block is defective, please replace the whole optical pick-up block. Never turn the semi-fixed resistor located at the side of optical pick-up block. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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, ob- serve from more than 30 cm away from the objective lens. Notes on Chip Component Replacement -Never reuse a disconnected chip component. -Notice that the minus side of a tantalum capacitor may be dam- aged by heat. SERVICE NOTES This label is located on the bottom of the chassis. TEST DISCS This set can playback CD-R and CD-ROM discs. The following test discs should be used to check the capability: CD-R test disc TCD-R082LMT (Part No. J-2502-063-1) CD-RW test disc TCD-W082L (Part No. J-2502-063-2) CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. This compact disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the exterior. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. optical pick-up semi-fixed resistor GeneralOutputs: Audio outputs terminal (sub/rear switchable) Power antenna relay control terminal Power amplifier control terminal Inputs: Telephone ATT control terminal Remote controller input terminal Antenna input terminal AUX input jack (stereo mini jack) Tone controls: Low: ±10 dB at 60 Hz (XPLOD) Mid: ±10 dB at 1 kHz (XPLOD) High: ±10 dB at 10 kHz (XPLOD) Power requirements: 12 V DC car battery (negative ground) Dimensions: Approx. 178 × 50 × 179 mm (w/h/d) Mounting dimensions: Approx. 182 × 53 × 161 mm (w/h/d) Mass: Approx. 1.2 kg Supplied accessories: Parts for installation and connections (1 set) Card remote commander: RM-X151 Design and specifications are subject to change without notice. US and foreign patents licensed from Dolby Laboratories.
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3 CDX-GT250M z 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 viscous (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. EXTENSION CABLE AND SERVICE POSITION When repairing or servicing this set, connect the jig (extension cable) as shown below. -Connect the MAIN board (CNP301) and the SERVO board (CN2) with the extension cable (Part No. J-2502-076-1). -CD playback You can play CD-DA (also containing CD TEXT*), CD-R/CD- RW (MP3/WMA files also containing Multi Session and ATRAC CD (ATRAC3 and ATRAC3plus format). Type of discs Label on the disc CD-DA MP3 WMA ATRAC CD *A CD TEXT disc is a CD-DA that includes information such as disc, artist and track name. SERVO BOAR D CN2 MAIN BOARD CNP301 J-2502-076-1