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SDM-S51 SERVICE MANUAL US Model Canadian Model AEP Model SPECIFICATIONS LCD panel Input signal format Resolution Input signal levels Power requirements DC input Power consumption Operating temperature Panel type: a-Si TFT Active Matrix Picture size: 15.0 inch RGB operating frequency* Horizontal: 28 - 60 kHz Vertical: 48 - 75 Hz Horizontal: Max.1024 dots Vertical: Max.768 lines RGB video signal 0.7 Vp-p, 75 , positive SYNC signal TTL level, 2.2 k, positive or negative (Separate horizontal and vertical, or composite sync) 0.3 Vp-p, 75, negative (Sync on green) 100 - 240 V, 50 - 60 Hz, Max. 0.56A DC 12 V (supplied AC adapter) Max. 25 W 5 - 35 °C Dimensions (width/height/depth) Display (upright): Approx. 387 Ч 330 Ч 175 mm (15 1/4 Ч 13 Ч 7 inches) (with stand) Approx. 387 Ч 281 Ч 48 mm (15 1/4 Ч 11 1/8 Ч 1 15 /16 inches) (without stand) Mass Approx. 3.7 kg ( 8 lb 3 oz) (with stand) Approx. 2.9 kg (6 lb 5 oz) (without stand) Plug & Play DDC2B Accessories See page 7. * Recommended horizontal and vertical timing condition Horizontal sync width duty should be more than 4.8% of total horizontal time or 0.8 µs, whichever is larger. Horizontal blanking width should be more than 2.5 µsec. Vertical blanking width should be more than 450 µsec. Design and specifications are subject to change without notice. TFT LCD Color Computer DISPLAY SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer: 1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges. 2. Check the interboard wiring to ensure that no wires are "pinched" or contact high-wattage resistors. 3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely certain that you have replaced all the insulators. 4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement. 5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement. 6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer. 7. Check the B+ and HV to see if they are specified values. Make sure your instruments are accurate; be suspicious of your HV meter if sets always have low HV. 8. Check the antenna terminals, metal trim, "metallized" knobs, screws, and all other exposed metal parts for AC Leakage. Check leakage as described right. LEAKAGE TEST 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 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT5