General Information; Diagnosis; Troubleshooting - Pioneer MJ-D508 Service Manual

7. GENERAL INFORMATION

7.1 DIAGNOSIS

7.1.1 TROUBLESHOOTING

7 The power of the system does not turn to ON. Display does not light up.
START POWER ON
Display
No
lights UP ?
Yes
Detal of Display No
is normal ?
Yes
OK
¶ IC201(Protector) is open.
¶ Transformer temperrature fuse is open.
¶ IC201(SYSTEM CONTROL µCOM) is broken.
Check for connection of Transformer to MAIN UNIT ASSY and
connection of DISPLAY UNIT ASSY to MAIN UNIT ASSY.
Display is dark
or Display flickers
" SIO Error "
Message shown
on the display
D202(Zener diode) is short-circuited or open.
¶ Connection of DISPLAY UNIT ASSY to MAIN
UNIT ASSY or Connection of MD MECHANISM
ASSY to MAIN UNIT ASSY is wrong.
¶ IC301(Protector) is open.
¶ IC305(Protector) is open.
Refer to "DETAILS OF ERROR DISPLAY" (next page).
MJ-D508
49