Abnormal Horizontal Deflection - Acer AF715 Series Service Manual

6-5 ABNORMAL HORIZONTAL DEFLECTION

1. ABNORMAL HORIZONTAL WIDTH OF VIDEO
READJUST H-WIDTH FUNCTION
NG
OK
CHECK FBT B+ VOLTAGE
CHECK FBT B+ VOLTAGE AT Q408
GATE
ABOUT 60.0V AT FH=31KHz
OK
CHECK THE HV OF CRT ABOUT
CHECK THE HV OF
25KV
CRT ABOUT 26KV
2. ABNORMAL HORIZONTAL RASTER CENTER
CHECK T903, D926, D927, R964, R968
CHECK T405,D409,D410,R436,P401 AND
JUMPER
P403 AND JUMPER
3. ABNORMAL HORIZONTAL VIDEO CENTER
CHECK IC101 PIN 9, 10, IC401 PIN 18, 19
CHECK IC101 PIN10,11 IC401 PIN18,19
4. ABNORMAL HORIZONTAL LINEARITY
CHECK L401, Q407, R447, C448
CHECK T402,Q413,R448,C428 AND IC101 PIN19~23
AND IC101 PIN 20, 21, 22, 23
CS SWITCHER Q429~Q433 Q415~Q419
CS SWITCHER IC403, Q410, Q411, Q420
NG
19
CHECK THE RELATIVE CIRCUIT
CHECK THE RELATIE CIRCUIT OF
Q409
OF Q404, Q405, & Q406
CHECK THE RELATIVE
CHECK THE RELATIVE CIRCUIT OF
SMPS. Q408,IC401 PIN 4、5、6 ,VR902
CIRCUIT OF SMPS.
Q911, Q912, Q914, Q915 &
IC401 PIN 4, 5, 6, VR 902