1400 HD (250-3505) Specifications Faxback Doc. # 1051 DIMENSIONS: 3.5 X 12.5 X 14.5(HxWxD) WEIGHT: 12.8 lbs. PROCESSOR: NEC V-20 (8088 equivalent) CPU SPEED: 8/4.77 MHz Switchable FCC CLASS: B, UL Listed Hard Drive: 20MB # OF SLOTS: (1) Modem slot ADD. DEVICE EXP: N/A MTBF: N/A STD. MEMORY: 768K OP. SYS: MS-DOS MAX. MEMORY: 768K VIDEO: Backlit LCD MEM CACHE: No cache, RAMDISK HEAT OUTPUT: N/A POWER SUPPLY: 15VDC 700 mA,4.8V 4400 MAh STD. PORTS: AC Adapter KEYBOARD: Full Size 76 Keys Parallel Printer-(DB-25) MATH CO.: 8087-2 Intel 8 MHz Serial-(DB-9) FLOPPY: (1) 720K 3.5" RGB Monitor(DB-9) ENVIRONMENT: Operating: 41 to 95 F External Disk Drive(DB-37) Storage: -4 to 140 F External Keyboard(5-Pin DIN) Humidity: 20 to 80 % Battery: 4.8V 4400mAh Nickel-Cadmium CURRENT BIOS ROM Version: 01.08.00 Utilities Version: N/A AC Adapter: Input: 105-135 AC 60Hz Output: 12V 2.2A DC Polarity: Center Positive (jej-05/10/94) --------------------------------------------------------------------------- 1400 HD (250-3505) Setup Utility Faxback Doc. # 1456 Press all at the same time to enter the Setup: Key Definition Current Setting F1 : Set time for Standby Mode 3:00 F2 : LCD/CRT LCD-CRT F3 : Internal/External Keyboard INT-EXT F4 : COM1/COM2 Setup RS/MODEM-MODEM/RS F5 : Direct Modem/Acoustic Coupler DIRECT-ACOUS F6 : Internal/External Screen Controller INT-EXT F7 : CPU Clock (MHz) 8.00-4.77 F8 : Date (MM-DD-YYYY) 03-28-1992 F9 : Time (HH:MM:SS) 19:35:37 Press ESC to Exit This display lets you decide on certain hardware options and indicate your choice to the 1400 FD/1400 HD. In Setup mode, the function keys perform as follows: F1 Lets you enter the time you want to elapse between the last time you use the computer and its automatic shut off. F2 Lets you choose between using the built-in display or an external monitor. F3 Lets you choose between using the built-in keyboard or an external one. F4 Lets you choose either COM port 1 or COM port 2 for an internal modem board and the RS-232C port. F5 If you are using and internal modem board, lets you choose between using a direct modem connection or an acoustic coupler connection. F6 Lets you choose between using the internal display controller or an external color monitor controller. F7 Lets you choose between an internal clock speed of 8.0 MHz or 4.77 MHz. F8 Lets you set the date of the real time clock. F9 Lets you set the time of the real time clock. (jej/tmc-12/02/95) --------------------------------------------------------------------------- 1400 HD (250-3505) Battery Information Faxback Doc. # 1054 Use Battery Pack 25-3521. Your Tandy 1400 HD comes with a custom battery pack that allows portable operation of your system. Using the battery, you can operate the Tandy 1400 HD two hours under the following conditions: * No options installed * Internal disk drives run no more than 10% of the operation time. * The battery is fully charged. When the battery drains below normal operation requirements, the LOW BATT indicator lights up and sounds two beeps. The computer will run for approximately 30 minutes longer. If the battery drains further, the indicator starts to blink, and five beeps sound. Plug in the AC adapter immediately. If you continue to use the battery, the computer's memory contents will be lost. If you can not charge the battery immediately, refrain from using the system. The battery charging time depends on the amount that the battery has been exhausted. If the battery is almost fully discharged, it takes approximately 15 hours to completely charge it with the system power turned off. With the system turned on, it takes longer to charge the battery. The computer provides a Standby mode to avoid unnecessary consumption of battery power. The computer automatically enters the Standby mode if it receives no key input from you for a preset time. When you press any key, the Standby mode is released and the previous screen appears. You can adjust the time that elapses before the unit enters the Standby mode. Press to enter Setup mode. Press F1, and set the desired time length. You can select from one minute to three hours, 59 minutes, in one-minute increments. While the computer is in the Standby state, the Standby indicator on the upper right of the keyboard is lit. Fully charged battery can retain the memory contents for approximately 11 hours. As in the normal operation mode, the LOW BATT indicator lights when the battery can then retain the memory contents for approximately one more hour, we suggest that you plug in the AC adapter. CAUTION: As in the normal operation mode, the LOW BATT indicator eventually begins blinking and sounds five beeps. If the battery becomes completely exhausted, the memory contents will be lost. NOTES: * Using an AC adapter other than the one supplied will cause the battery of the system unit components to fail. * When you do not intend to either use the system via the AC adapter or recharge the batter, unplug the AC adapter from the wall outlet. The average life of the battery pack is normally three years. However, if you leave the battery completely discharged or overcharge them, the battery wears down prematurely. Replacing the Battery: 1. Turn the power switch off and unplug the AC adapter. Disconnect all peripherals. 2. Remove the battery cover on the left top of the unit. 3. Pull on the ribbon to lift our the battery pack. 4. Unlock the latch on the connector and detach the old battery pack. 5. Push the cable from the new battery pack onto the connector until you hear a click. 6. Store the new battery pack in the compartment. CAUTION: Before closing the battery cover, be sure that the battery cords are neatly stuffed between the battery pack and the rear panel, not routed over the battery pack. 7. Replace the battery cover. 8. Reconnect all the peripherals.