SONY CFDS28L
Manual de Servicio

SECTION 1 SERVICENG NOTES
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the lid (CD), use Chuck Plate Jig. � Code number of Chuck Plate Jig: X-4918-255-1 HOW TO CHANGED THE CERAMIC FILTERS This model is used two ceramic filters of CF1 and CF2. You must used same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must changed two pieces together since it�s supply two pieces in one package as a spare parts.
Mark Center frequency

red
CF1, 2 mark

10.70 MHz 10.67 MHz 10.73 MHz 10.64 MHz 10.76 MHz

blue orange black

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. LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1. Turn ON the POWER button and press FUNCTION button to CD position. 2. Open the lid (CD). 3. Turn on S501 with screwdriver, etc. as following figure. 4. Press the CD � button. 5. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down three times for focus search.

white

S501

�3�