2. No Raster
No Raster
Is CRT | No |
heater |
|
Yes
Turn the Brightness
&Contrast control to set Maximum
| Yes |
| |
Is whole | No | ||
screen bright? |
| ||
| |||
| Yes |
| |
|
| ||
Check | No | ||
G1 voltage about | |||
| |||
| |||
| Yes |
| |
|
| ||
|
|
| |
Is CRT
G2 (screen) voltage No about 500V?
| Yes |
|
Is 80V DC | No | |
line normal? |
| |
Yes
Does
turning the Brightness No control counterclockwise 
make screen
bright?
Yes
Trouble in FBT
Is Heater
Voltage (CRT PWB)
about 6V?
Yes
Trouble in power supply circuit
Trouble in power supply circuit
Trouble in G1 line of Main PWB
Trouble in FBT
Trouble in 80/ 120V DC line of power supply unit
High Voltage trouble in FBT
No |
| Trouble in |
|
| CRT |
|
|
|
Refer to trouble in power supply unit.
Refer to trouble in P,S,U
16
