Dell E773c Series Service Manual page 18

6-5 ABNORMAL HORIZONTAL DEFLECTION
1. ABNORMAL HORIZONTAL WIDTH OF VIDEO
READJUST H-WIDTH FUNCTION
OK
CHECK FBT B+ VOLTAGE
ABOUT 62V AT FH=31KHz
OK
CHECK THE HV OF
CRT ABOUT 24.5KV
2. ABNORMAL HORIZONTAL VIDEO CENTER
CHECK IC401 PIN5,12
RELATIVE CIRCUIT
3. ABNORMAL HORIZONTAL LINEARITY
CHECK L401 AND C430 OR R456
RELATIVE CIRCUIT
NG
NG
CHECK THE RELATIVE CIRCUIT
OF Q404, Q405, & Q406
CHECK THE RELATIVE
CIRCUIT OF SMPS.
18