Abnormal Horizontal Deflection - HP D8904 Service Manual

1. ABNORMAL HORIZONTAL WIDTH OF VIDEO
READJUST H-WIDTH FUNCTION
OK
CHECK FBT B+ VOLTAGE
ABOUT 60V AT FH=31KHz
CHECK THE HV OF
CRT ABOUT 25KV
2. ABNORMAL HORIZONTAL RASTER CENTER
CHECK D418, D419, R457, R458, L404
3. ABNORMAL HORIZONTAL VIDEO CENTER
CHECK IC401 PIN 4, 7
RELATIVE CIRCUIT
4. ABNORMAL HORIZONTAL LINEARITY
CHECK L401, L403, Q426, RY401
AND IC101 PIN 28, 29

6-5 ABNORMAL HORIZONTAL DEFLECTION

NG
CHECK THE RELATIVE CIRCUIT
OF Q404, Q405, & Q406
CHECK THE RELATIVE
CIRCUIT OF SMPS.