RP-U200
RP-U200
6
●
Starting DIAG
While the opening message appearing at the power ON is on display, press the “DSP” key 3 times; quickly at
the first and second times and keep pressing it at the third time until the DIAG function is started.
●
Display when DIAG function is started
First, “DIAG” appears on the FL display of the main unit, followed by the version of the
microcomputer for 1 second (e.g., 1.223f), the checksum of the microcomputer for 2 seconds
(e.g., 83B3) and finally the DIAG menu (e.g., 1: ALL). Also, all the function LED segments light
up.
Version of the microcomputer
Checksum of microcomputer
D I A G
1 . 2 2 3 f
8 3 B 3
1 :
A L L
1 second
later
2 seconds
later
DIAG started
(*1) If a protection function history has been recorded, the type of
the protection function recorded last is displayed.
When there is no protection history (*1)
Some seconds
later
DIAG menu
If the protection function activates after DIAG has been
started and the power is turned off ;
When the protection function (*2) activates, the protection function
history appears on the display and the power turns off. Repair the
faulty parts according to the displayed history.
(*2) When any other faulty condition is found with the power source
etc., the protection function forces the power to turn off.
PT
PS
display
(When the power is turned on without this abnormality corrected, the
protection function activates to shut off the power relay. Display may not
light if there is an abnormality with the power supply for the display.)
Cause: There is an abnormality in the power supply section (voltage).
Supplementary information: As the power from the following sources is
detected, it is possible to determine where an abnormality exists.
Stabilizing power source
±
15A, +9V, +5A, +5D SW, -VP
+12V(Tuner), Vcc(for power IC)
Besides the above possible causes, the cause may be disconnection of
the connector or around the CPU.
●
Protection history
When the protection function has activated, its history is stored in
memory with a memory backup. Even when no abnormality is noted
while the unit is being serviced, an abnormality which has occurred
previously can be defined as long as the backup data has been stored.
The protection history should always be cleared before returning the
unit from service.
The protection history is cleared when DIAG is canceled by selecting
“MEMORY” (memory initialization) from the setting items of the DIAG
menu No.7 INT or when the backup data is erased.