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9. Maintenance Service and Trouble Shooting
1 TROUBLESHOOTING PROCESS
Check to see if
Fuse3 is normal
No light and sound
Abnormal
Check VD504, C507,
V513, etc.
Check to see if the
collector voltage of
VD554 is 18V
Check
N701,N101
Check to see
if , 9v,
5v is normal
Check the control
voltage of V552 or
CPU power
The failure of
horizontal unit or
N101
Normal
Normal
Normal
Abnormal
Check to see 103V
etc. voltage is normal
Test to see all terminal
Resistance of load
Is normal
Check switch
power unit
Check to see if
rectifying tube
is normal
Change
rectifying tube
Check the
Loader
Abnormal
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Maintenance Service and Trouble Shooting
Summary of Contents for HTN20R15
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Page 26: ...PCB Diagram 3 PCB Diagram ...