Radio Shack TRS-80 - Page 66

YES
SOLDER
SHORT?
CPU
ClK SOURCE
BAD
POWER·UP
CLEAR
lOGIC
DEFECTIVE
CHECK SWITCH
S·2 AND
RESET lOGIC
OPEN PCB ETCH?
NO
NO
NO
NO
YES
MAY NOT BE
CPU PROBLEM····
SECTION ISOLATE
REPLACE
240
(CPU)
CAS/RAS
lOGIC
FIGURE 17. CPU Flowchart
65