NEC N9902-1 User Manual

CHECK
U301 PIN 1, PIN 2
H/V SYNC
NO RASTER
CHECK
B+
TROUBLE IN
MCU U701
YES
YES
TROUBLE IN
Q315,Q318,T301,D320,
D321,Q325,Q305,Q306,T302
CHECK Q315
COLLECTOR ABOUT
1050Vp-p
CHECK G1
VOLTAGE ABOUT
-45~65V
TROUBLE IN
G2 VOLTAGE
YES
YES
TROUBLE IN
Q331, Q323, Q329, R394,
D314, T302, C328, U701
NO
NO
CHECK
T302 PIN 3 VOLTAGE
57V AT 31.5KHz, 172V
AT 93.7KHz
TROUBLE IN
U301,Q312,D317,D111,R387,
R312, Q307, Q308
OR DEFLECTION YOKE
YES
NO
CHECK
U301 PIN 26, 28
H/V SYNC
TROUBLE IN
U301
YES
YES
NO
NO
POWER SUPPLY
CHECK
NO
YES
CHECK
U701 PIN 31 IS LOW
NO
5. NO RASTER
22

NEC N9902-1 Specifications

General

Brand	NEC
Model	N9902-1
Category	Monitor
Language	English