Sony hcd c 450 service manual
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Extracted text from sony hcd c 450 service manual (Ocr-read)
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2 HCD-C450 SELF-DIAGNOSIS Self-diagnosis Function (When letters/numbers appear in the display) The self-diagnosis function is activated to prevent the system from malfunctioning. In this case a five-character service number (e.g., C 13 00) with a combination of a letter and digits appears on the screen and the front panel display. Refer to the following table. C:13:00 First three characters of the service number C 13 C 31 E XX (xx is a number) Cause and/or Corrective Action The disc is dirty. ,Clean the disc with a soft cloth. The disc is not inserted correctly. ,Re-insert the disc correctly. To prevent a malfunction, the system has performed the self- diagnosis function. ,Contact your nearest Sony dealer or local authorized Sony service facility and give the 5-character service number. Example: E 61 10 CHANGE OF OPTICAL PICK-UP Optical Pick-up has been replaced from KHM-240AAA (TYPE A) to KHM-270AAA (TYPE B) from the middle of production. In parallel with that, certain parts of DVD board have been changed. TYPE A/B DISCRIMINATION PARTS LIST OF EACH MODEL DVD BOARD REF TYPE A TYPE B KHM-240AAA KHM-270AAA R076 1-216-837-11 METAL CHIP 22K 5% 1/10W No Mount R077 1-216-815-11 METAL CHIP 330 5% 1/10W 1-216-833-11 METAL CHIP 10K 5% 1/10W R079 1-216-801-11 METAL CHIP 22 5% 1/10W 1-216-845-11 METAL CHIP 100K 5% 1/10W SERVICING NOTE SILVER: KHM-240AAA (TYPE A) BLACK: KHM-270AAA (TYPE B) optical de vice Ver 1.3 2003. 05
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3 HCD-C450 SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Notes on chip component replacement -Never reuse a disconnected chip component. -Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing -Keep the temperature of soldering iron around 270˚C during repairing. -Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). -Be careful not to apply force on the conductor when soldering or unsoldering. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit. To Exposed Metal Parts on Set 0.15 µF 1.5 kΩAC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. 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 Carry out the S curve check in CD section adjustment and check that the S curve waveform is output several times. Ver 1.3 2003. 05 CHECKING OF OPERATIONS WITH REMOTE COMMANDERS OF DIFFERENT MODELS Some of the signal of remote commander vary between generation of player. Between DAV-S400/S500/S800/C450/C700/C900 and DAV-S550/ S880/C770/C900, remote commander signal codes of FUNCTION, BAND, ST/MONO and MEMORY are different. Take notice of the above when you check the operation with remote commanders of different models.