Digital Control Error - NEC MultiSync 3D JC-1404HME Service Manual

4. DIGITAL CONTROL ERROR
(4-1) DIGITAL CONTROL ERROR
CHECK +5V, +12V
NG
OK
+5V REG, +12VREG FAILURE
REFER TO ITEM (2-2-1)
CH ECK H. SYNC
MEASURE CN-M 3
pin
NG
NG
OK
SUB UNIT
FAILURE
_fl_J1_
·FREQ . . . . . . . 15kHz"'41kHz
• POLARITY ...... POSITIVE
·VOLTAGE LEVEL .. TTL level
·NO NOISE
__ffil;_
CHECK V. SYNC
MEASURE CN-M 4
pin ·FREQ . . . . . . . . . . 40~100Hz
·POLARITY ..... NEGATIVE
OK
Tu
·VOLTAGE LEVEL ..
nu .. ,,
-ijSENG
CHECK INPUT SIGNAL ID CODE
NG
OK
SUB UNIT
FAILURE
DIGITAL CONTROL CIRCUIT FAILURE
(IC151~IC156, etc.)
M5 M6
PA2 PA3
1AN1t'o<
(HP)
1 0
1 0
0 0
0 1
0 1
0
-
0
-
0
0
1
-
0
-
1
-
1
1
1 1
0 0
0
-
0
-
0 0
0 1
0 1
-35-
M7
MS
PA4 PA5
(VP) (HE
0 1
1 1
1 1
0 1
1 1
- -
- -
0
1
- -
-
1
-
1
0
1
1
1
0 1
-
1
-
-
1 1
0 1
1 1
. :: "'' :1
j;
;: . ; i·
:p~'
M9 M10 M3 M4 +-CN CONNEC
PA6
PA7
(VE) (MODE) FH Fv
1 0
-
0 CGA
1 0
-
0 EGA
1 0
(i)
0 VGA 350
1 0
(i)
0 VGA400
1 0
(i)
0 VGA480
-
0
-
1 8514A
0 0
-
0 MACil
1
0
(ii)
0
800•600(1)P.P
-
1
-
0 MDA
0 0
(i)
0 PGC
0 0
-
0 TTL C.S.
1 0
-
0 TTL N.P.
1 0
-
0 TTL N.N
1 0
(i)
0 ANALOG(1)P.P
0 0
(ii)
0 ANALOG(2)C.S
-
1
-
0 USER
1 0
(ii)
0 800•600(2)
1 0 (ii) 0 800•600(3)
1 0 (ii) 0 800•600(4)
{
(i)
15kHz ~33kHz
FH
(ii)
33kHz~40kHz
40~75Hz
75~100Hz
TOR