Setting Of The Adjust 1 Menu; Adjustment Of Oscillator Frequency; Adjustment Of Vf Y Analog Signal Level - Hitachi SK-HD1300-S3 Service Manual

4 - 2．Setting of the ADJUST 1 menu
No. Item
1 74.175824M
(Oscillator freq.
adjustment
(for 59.94Hz))
2 74.250000M
(Oscillator freq.
adjustment
(for 50Hz))
3 VF(D/A) LEV
(VF Y analog
signal level
adjustment)

Adjustment of oscillator frequency

Adjustment of VF Y analog signal level

Terminal
VIDEO unit 74.175700MHz
TP1
～74.175900MHz
(*1)
VIDEO unit 74.249900MHz
TP1
～74.250100MHz
(*1)
VF connector The level of
(*2) 100% in the color
VIDEO OUT bar:
:1 pin 700mV ± 20mV
GND ( 100% ± 3% )
:5 pin
Spec
Position the cursor to the 74.175824M.
Make sure the output format is 1080/59.54i.
Adjust frequency to the specified value after an
image is stable.
Position the cursor to the 74.250000M.
Make sure the output format is 1080/50i.
Adjust frequency to the specified value after an
image is stable.
Position the cursor to the VF (D/A) LEV.
Adjust the VF level to the specified value with
an oscilloscope (75Ω terminated).
Push the MENU button to hide the characters.
(the characters show up as the MENU button is
pushed again)
Procedure
4-7