5.2.2 Visually Inspecting the Computer Consoles
As part of the preventive maintenance procedures visually inspect the
Computer Consoles for damage and abuse.
1. Inspect the Controller jacks and Peripheral jacks for broken or
bent pins.
2. Check RF cable for cracks in the insulation or bare (pinched)
areas.
3. Open Cartridge Door and check cover closed Interlock switch. With a
small blade screwdriver press the plunger down. Release plunger and
observe return to normal position.
4. Inspect Cartridge slot for foreign objects or damage.
5. Inspect power jack for bent or damaged pin.
If any damage is found repair the defective unit according to the
instructions outlined in the disassembly and assembly paragraphs of
this chapter.
5.3 SYSTEM CHECK-OUT
The following paragraphs detail the standard check-out procedures
used to determine the operational status of the 400/800 Computer
Consoles. Refer to Figure 5-1, System Check-Out Flowchart. which
depicts the typical paths followed by a service person. Figure 5-1
can be used as a guide in interpreting maintenance on the 400/800 C
omputer Consoles.
5.3.1 Memo Pad Test
This test is performed everytime the 400/800 Computer Console is
either powered up (turned ON) or when the System Reset switch is
depressed. This is a Console Self-Test contained in the Operating
System (10K ROM) of the 400/800 Computer Consoles.
After the Power ON/OFF switch is set to ON, the Operating System per-
forms a self-test and displays the ”ATARI COMPUTER - MEMO PAD” logo
to indicate a passing condition. If the system fails to respond with
the correct indication, repeat the System Power-Up sequence for a
second time, refer to Chapter 2 for instructions. If the system still
fails to display the Memo Pad Logo or if the screen displays any of
the following symptoms, refer to paragraph 5.4, Troubleshooting, for
instructions.
o Green Screen
o Black Screen ( Power Indicator ON)
o Power Indicator NOT ON.
o Random Characters appear on Screen
o Character begins scrolling across Screen
o Unit ‘Locks-Up’. Memo Pad Logo does not appear, Screen correct
color shade (not green, not black).
ATARI Personal Computers 5-3
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