HR-MB3
7 – 2
Startup (AC adaptor)
The LOADING screen does not go to the initial
screen at startup.
Is voltage applied to TL415 ?
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
No
Startup (battery)
The charging mode starts.
The LOADING screen does not go to the initial
screen at startup. ?
No
Yes
The initial screen starts.
No
Check voltage on all pins of IC400.
Check voltage on all pins of IC400.
Is voltage applied to pin 3 of IC404 ?
Check peripheral circuits of IC404
Yes
Check peripheral circuits of IC401.
Yes
Check peripheral circuits of IC403.
Is voltage applied to pin 15 of IC400 ?
Is voltage applied to TL412 ?
Perform checks with the ENTER key pressed.
Yes
Is voltage applied to pin 15 of IC400 ?
No
Check Q403, D402, and D404~D406.
Yes
Is voltage applied to pin 3 of IC404 ?
No
Check peripheral circuits of IC404.
Check peripheral circuits of IC401.
Yes
Is voltage applied to TL415 ?
Is voltage applied to TL412 ?
No
Yes
Is voltage applied to TL414 ?
Yes
Check peripheral circuits of IC100, IC500.
Check voltage on all pins of D401.
Is voltage applied to pin 3 of IC401 ?
No
No
Is voltage applied to pin 3 of IC403 ?
Is voltage applied to TL414 ?
No
Yes
Is voltage applied to pin 3 of IC403 ?
Yes
Check peripheral circuits of IC403.
Check peripheral circuits of IC100, IC500.
No
Summary of Contents for HR-MB3
Page 13: ...HR MB3 5 4 MEMO ...
Page 38: ...HR MB3 8 9 MEMO ...