Samsung DP14LS Service Manual page 30

6-2-6 Invariable H_Size
Are D414, Q411 and Q412 OK?
Yes
Does the PWM duty of IC201's Pin
22 vary, pressing H_Size button?
No
Is paravola waveform on
8
IC401's Pin 24?
Yes
Check and replace Q409, Q410, L402.
6-2-7 Abnormal H_Size
Check if R441 are right
as CRT differential items?
Does PWM duty of IC201's
Pin 22 vary with different timings?
(Low freq. : narrow duty
High freq. : wide duty)
Yes
Does the FBT B+ voltage on T501's
Pin 2 vary with different timings?
Yes
Adjust horizontal minimum size with
softjig. (Refer to 5-2-1)
DP14L*/DP15L*
No
Replace it.
Yes
Is Q409 OK?
Replace IC201.
No
Replace IC401.
No
Check and replace IC201 and some
parts around it.
No
Refer to 6-2-12 High Voltage Failure.
No
No
6 Troubleshooting
Check and replace
Q409.
WAVEFORMS
8 1.12 V (IC401, #24)
CH1 P-P = 1.12 V CH1 RMS = 3.094 V
6-11