NEC AS120-1 User Manual

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3. NO RASTER
NO VIDEO
(POWER INDICATOR
GREEN or AMBER)
CHECK
POWER INDICATOR
GREEN or AMBER ?
CHECK
SCREEN CONTROL
KNOB OF FBT
CHECK
VOLTAGE AT
D924/D926 CATHODE (190V)
D923/D929 CATHODE (80V)
IC904 OUT (12V)
D921 CATHODE
(6.3V)?
CHECK
IC401 (MICOM) PIN 6
5V (HIGH), IC801 PIN 10
12V (HIGH)?
ROTATE SCREEN
CONTROL KNOB TO
CLOCKWISE or
COUNTER CLOCKWIES
TROUBLE IN
IC401 (MICOM),
IC801
TROUBLE IN
CDT SOCKET, BOARD
TROUBLE IN PRIMARY
CIRCUIT OF T901
TROUBLE IN
P302 SIGNAL CABLE
AMBER
GREEN
OK
YES
NO
YES
NO

NEC AS120-1 Specifications

General

Brand	NEC
Model	AS120-1
Category	Monitor
Language	English