Digital Control Error; User Control Error; Memory Access Error - NEC MultiSync 3D JC-1404HME Service Manual

(4-2) USER CONTROL ERROR
NG
+5V REG. FAILURE
CHECK +5V
1----------~-----1~
REFER TO ITEM (2-2-1)
OK
CHECK USER CONTROL ID CODE NG CONTROL PWB FAILURE
1 - - - - - - ~ " " 1
OK
REFER TO DIGITAL CONTROL ERROR
(Cf). If two switches are pushed at the same time, the monitor
will be disabled, and the user controls will not function when
pressed simultaneously.
(4-3) MEMORY ACCESS ERROR
NG
CHECK +5V
l
+5V REG. FAILURE
REFER TO ITEM (2-2-1)
+oK
NG
CHECK CPU MODE CODE
-
-
CONTROL PWB FAILURE
·.r;: ..
C1 C2 C3
PDQ PD1 PD2
(CS0) (CS1) (CS2)
0 0 0
-
0 0 1
BRIGHT
0 1 0
CONT
0 1 1
H.POSI
1 0
0 H.SIZE
1
0 1 V.POSI
1 1
0 V.SIZE
1 1
1 DISABLE
C4 CS
PD3
PD4
1 0 UP
0 1 DOWN
1 1
DISABLE
i
OK
REFER TO DIGITAL CONTROL ERROR
C6 C7
PD6 PD7
(Cf). If two different signals are put into the same memory location, the most
recent signal will be written to this memory and the previous signal erased.
Therefore, an error could occur when the microprocessor will have the
same ID code for two different signals.
MDA ..... TTL, MODE
SW ➔
ON
PGC ..... ANALOG, COMPOSITE SYNC. MODE
SW ➔
OFF
MACII ..... ANALOG, SYNC ONG, MODE
SW ➔
OFF
-36-
0 0 USER CONTROL MODE
0 1 FACTORY ADJ. MODE
0 DATA LOAD
1 FACTORY DATA WRITINC