Minolta Di 620 Manual page 268

C0400, C0420
Step
1 Has Exposure Lamp FL1 blackened?
2 Does the Exposure Lamp turn ON when
"Exp. Lamp Check" of "Function (I.R.)"
under "I.R. & EDH Check" available from
the Tech. Rep. mode is run?
3 Does "NG" appear when "Address Adjust"
of "Function (I.R.)" under "I.R. & EDH
Check" available from the Tech. Rep. mode
is run?
4 Does "NG" appear when "Scanning Check"
of "Function (I.R.)" under "I.R. & EDH
Check" available from the Tech. Rep. mode
is run?
5 Is the voltage across PJ9C-7B on PWB-C
and GND DC24V?
C14A0, C14A1, C14A2, C14A3
Step
1 Is the resistance across PJ3UN10-1 and
PJ3UN10-2 on UN10 about 30 ohms?
2 Does the voltage across PJ7A-6A on PWB-
A and GND go LOW when the Power
Switch is turned ON?
3 Does the value for "IR Thermistor" shown
on the I/O Check screen change when the
Power Switch is turned ON?
Check Item
Check Item
Result
YES Change FL1.
NO Check PWB-IE and check step 4 and
onward.
YES Check the optical path to the CCD for
possible obstruction.
YES Change PWB-IB or UN10.
YES Change PWB-A.
NO Change PWB-C.
Result
NO Change UN13 or PWB-IE.
NO Change PWB-A.
NO Change PWB-A or UN10.
T-53
Action
Action