User manual TASCAM 246 PORTASTUDIO SCHEMATICS

[. . . ] The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. Important Safety Precautions IMPORTANT (for U. K. Customers) TO THE USER DO NOT cut off the mains plug from this equipment. If the plug fitted is not suitable for the power points in your home or the cable is too short to reach a power point, then obtain an appropriate safety approved extension lead or consult your dealer. If nonetheless the mains plug is cut off, remove the fuse and dispose of the plug immediately, to avoid a possible shock hazard by inadvertent connection to the mains supply. [. . . ] The trimmer potentiometers by each connector may be turned counterclockwise or clockwise to cut or boost respectively the level of the signal sent from these connectors. The maximum cut achievable (relative to nominal) is ­7 dB and the maximum boost is +4 dB. As shipped, the trimmers are set to the standard +4 dBu level. OFF (up) ON (down) When O F F, digital signals received at either [32] or [34] are not directly retransmitted. When the switch is set to O N, received digital signals are retransmitted directly from the digital outputs [33] and [35]. to take place using multiple MD-801 units "daisy-chained" together. D-IN NORMAL 4 [41] WORD SYNC IN This BNC connector accepts a 44. 1 kHz word clock (impedance 75 ) at 44. 1 kHz (±6%). [44] KEYBOARD connector This connector is used to connect a PS/2-type computer keyboard which can be used for the direct alphanumeric entry of titles, etc. as well as for controlling playback operations. Depending on the setting of MODE SET bank DIP switch 1 [43], either a US-type or a Japanese-type keyboard can be used. See 6, "Use of a keyboard with the MD-801" for details of keyboard-based operations. [42] WORD SYNC THRU This self-terminating BNC connector echoes the word clock signal received at [41]. [43] MODE SET DIP switch bank This switch bank allows the setting of various local parameters. OFF (up) JA PA N K B D [45] REMOTE (SERIAL) connector This RS-232 interface allows control by a computer or by other serial controllers. ON (down) Allows the selection of a Japanese (106-key) keyboard (JA PA N K Y B D) or an American-style (101key) keyboard (U S K B D) to be connected to [44] for titling, etc. When set O F F, all front panel operational controls are enabled. When set O N, only the S TO P key on the front panel are enabled when the MD-801 is playing as the result of e command received from an external controller (RC-801, etc. ). When O F F, any word clock signals received at [41] are not used, and the unit uses its own internal clocking. The default is off, which means that when playback is stopped, it will start at the beginning of the disc, unless a track number is explicitly specified. This function, when on, changes the function of the STOP key [5]. When the resume function is on, and the STOP key is pressed in play mode, the MD-801 enters play ready mode. If the STOP key is pressed once again, the MD-801 enters stop mode. After the menu has been opened with the SHUTTLE wheel, the display changes: RESUME> OFF 3. 8 EOM track EOM TRACK ? The EOM track is similar to the EOM disc function, as described above. The EOM tally signal is transmitted before the end of a track playback, and this menu allows the time before the end to be set, or the disabling of this function (default off). When this message is transmitted, the E O M indicator flashes in the display. After the menu has been opened with the SHUTTLE wheel, the display changes: EOM TRK> OFF The options available are on and off. The time may be set from 1 to 99 seconds, in 1 second steps, or set to off. 3. 7 EOM disc EOM DISC ? 3. 9 Timer-controlled playback TIMER PLAY ? This menu item affects the output of the MD-801 to a device attached to the parallel port (see 7. 1, "REMOTE (PARALLEL) connector". When set on, an "EOM DISC" tally signal is transmitted from the parallel port when the end of the disc is reached in playback (or recording, in the case of the MD-801R). When this message is transmitted, the E O M indicator flashes in the display. In this menu, it is possible to select how many seconds before the end of the disc this message is to be sent, or to turn the message off completely. [. . . ] An error occurred while loading the flash start buffer from disc (see 6. 3, "Flash start"). If this error persists, try with another disc and check the installation of the optional BU-801 RAM buffer. This resulted in the recording process being stopped. Eject the disc and try again, or try with a different disc. [. . . ]