Poor Focus; Sound (For Audio Model Only) - Tatung VM7K9 Service Manual

READJUST FOCUS CONTROL
ADJUST VOLUME CONTROL
OK
ENSURE THE SOUND SOURCE
IS POWER ON
OK
ENSURE THE SOURCE CABLE
CONNECTION

6-8 POOR FOCUS

NG
6-9 NO SOUND (FOR AUDIO MODEL ONLY)
OK
CHECK FOCUS CONTROL UNIT, FOCUS
LEAD WIRE, CRT SOCKET & CRT
CHECK IC501
PIN 14 ABOUT 14V
NG
OK
CHECK IC501
NG
OK
SPEAKER FAILURE
CHECK POWER
SUPPLY CIRCUIT
IC501 FAILURE