Toshiba DVR610 Service Manual - Page 34

FLOW CHART NO.10 Video E-E does not appear. Are the video signals inputted to each pin of IC2805? No IC2805 IC2805 8PIN 10PIN VIDEO-IN1 (REAR) VIDEO-IN2 (FRONT) Yes No Is the video signal ouputtted to Pin(20) of IC2805? Yes No Is the video signal inputted to Pin(30) of IC1301? Yes Check the line between video input terminal and each pin of IC2805, and replace P1 (BOARD MCV) if defective. IC2805 8PIN → JK2804 VIDEO-IN1 (REAR) IC2805 10PIN → JK1231 VIDEO-IN2 (FRONT) Are active level of Pin(22,23,24) of IC2805 become as shown below? INPUT LINE(REAR) LINE(FRONT) 22PIN 23PIN 24PIN H H L H L H Yes Replace P1 (BOARD MCV). No Check the line between Pin(22,23,24) of IC2805 and Pin(57,58,59) of IC1501, and replace P1 (BOARD MCV) if defective. Check the line between Pin(20) of IC2805 and Pin(30) of IC1301, and replace P1 (BOARD MCV) if defective. Is the C-SYNC signal outputted to Pin(25) of IC1301? Yes Is the C-SYNC signal inputted to Pin(50) of IC1501? No Is 5V voltage supplied to Pin(23) of IC1301? Yes No Check the line between Pin(25) of IC1301 and Pin(50) of IC1501, and replace P1 (BOARD MCV) if defective. Yes No Check the P-ON+5V(2) line and replace P1 (BOARD MCV) or P3 (BOARD POWER SUPPLY) if defective. Yes Is the serial data, clock and chip select signal supplied to Pin(53, 54, 55) of IC1301? No Replace P1 (BOARD MCV). Check the line between Pin(53,54,55) of IC1301 and Pin(19,20,21) of IC1501, and replace P1 (BOARD MCV) if defective. No Is the video signal inputted into Pin(1) of IC2101? Yes Is the video signal outputted to Pin(15) of IC2101? No Yes Continued to C on the next page. Check the line between Pin(26) of IC1301 and Pin(1) of IC2101, and replace P1 (BOARD MCV) if defective. Is the "H" pulese inputted to Pin(9, 10, 11) of IC2101? Yes No Is 5V voltage supplied to Pin(16) of IC2101? Is 5V voltage supplied to Yes Pin(7) of IC2101? No Replace P1 (BOARD MCV). Replace P1 (BOARD MCV). Check the AL+5V, AL-5V line, and replace P1 (BOARD MCV) if defective. 1-10-13 E9KGATR