Sharp MZ-80P5 Service Manual page 17

(For CPU board check)
Check IC26
Check chip select circuit.
(IC22 : ROM 1)
(IC25: ROM 2)
(For CPU board Check)
Check IC27
Check IC26
Check IC26
Check chip select circuit.
(IC14 : RAM 1)
(IC18: RAM 2)
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Check IC26
Check IC27
Check IC26
Check IC26
Z-80A
74LS32
Z-80A
Z-80A
Z-80A
74LS32
Z-80A
Z-80A