Repairing Missile Command PCB's

When the testing device / software application loads the test table for Missile Command, the hardware interface unit switches to the 6502 type microprocessor, and the various sections of circuitry which make up this game PCB can be examined and verified.

The tests begin with determining that the correct program is installed, by running a pre-determined set of routines to insure each one of the six ROMs match with the master data reference files. Any chip which fails this test is replaced. The 6 sockets are also tested, as the chips are examined and verified as they exist on the circuit board.

The next step in the testing procedure is to verify the integrity of the 8 dynamic rams. F4, H4, J4, K4, L4, M4, N4, and P4. Random data is written into these rams, read back, and compared. Error analysis determines the failing ram chip, if an error in detected. Further testing can reveal failing support chips in the circuit, eliminating unnecessary IC replacement.

Test are run to ensure all player 1and player 2 inputs work correctly. The track ball sense circuit is verified, and the output ports are each tested individually.

Item Name:   Missile Command PCB Repair Service
Item Number:   MCRS-1
Price:   $125.00

PayPal address = gls1electronics@yahoo.com

Contact me at greg@gls1electronics.com for more information.
	*Shipping Address*

	GLS1 Electronics
	238 North 10th Street #4
	Cottage Grove, OR 97424

      Payment by check is acceptable, please enclose check inside box with game PCB when shipping. When paying by check, please include return shipping of $12.00.
      All return shipping from this shop is done USPS priority mail, which usually means a 2-3 day delivery time.
     GLS1 Electronics will also consider non-working Missile Command PCB trade-ins as payment for repair services.  Email me at greg@gls1electronics.com for more information.   15% discount is offered on repair quantities of 10 boards or more.

Missile Command PCB Repair
Computer Aided Testing System