SERVICE MANUALDigital Video Recorderwith Multiplexer FunctionDSR-3506(Product Code : 175 811 21) (without HDD)(Product Code : 175 811 39) (80GB)(Product Code : 175 811 31) (160GB)(Product Code : 175 811 32) (300GB)(U.S.A.)(Canada)FILE NO.REFERENCE No. SM5310583L8HBE/US, US2, US3, US4, XENOTE : 1. Parts order must contain model number, part number, and description.2. Substitute parts may be supplied as the service parts.3. N. S. P. : Not available as service parts.4. Regardless from the unit's specification the HDD may have a differentcapacity or there might be more than one HDD installed.Even with the same product number the HDD installed might have a differentcapacity, or there might be either one or two HDD installed.Design and specification are subject to change without notice.CONTENTSSAFETY PRECAUTIONS ................................................ 2NOTES ON HANDLING INTERNAL HDDCOMPONENTS ................................................ 4SPECIFICATIONS ........................................................... 51. RESETTING THE USE TIME ...................................... 62. DISASSEMBLY ............................................................63. CHECKING THE HARD DISK DRIVE ......................... 74. OVERWRITING THE FIRMWARE ............................... 95. PARTS LIST ............................................................... 13CIRCUIT DIAGRAM & PRINTED WIRING BOARDS ... C1DSR-3506P(Product Code : 175 811 29) (without HDD)(Europe)(Australia)