Sharp VL-SW50U Service Manual page 47

1. Adjustment of fixed data writing
ADD
DATA
(l)Before starting Y/C adjustment, be sure to write the
23
00
25
00
26
DO
*
2. Adjustment of input Y level
Measuring instrument Oscilloscope
, Mode
VCR STOP
. Input signal
Color bar
Measuring point
TL801 or TL8826
Adjustment address 32
Adjustment level
500 mVp-p & 20 mVp-p
specific data in the addresses listed left.
If the data listed left is written after Y/C adjustment,
adjusting values may deviate.
Before starting Y/C adjustment, write 00 to the address
31
At the end of Y/C and LCD adjustment, write FF to the
address
31.
LCD OPEN +TL801
LCD CLOSE-+TL8826
(1)lnput the color bar signal into the video input/output terminal in the VCR STOP mode.
(2)Enter the VCR adjustment mode with an adjustment remote control, and select the address 32.
Select the address, using the FF or REW key, and fix it with the PB key.
(3)Make an adjustment so as to get 500 mVp-p between SYNC TIP and WHITE PEAK on TL801 or TL8826.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 32.
3. Adjustment of playback Y level
Measuring instrument Oscilloscope
Mode PB
Playback signal
Color bar (JiGWR5-5NSP)
Measuring point TL801 or TL8826
Adjustment address 27
Adjustment level
500 mVp-p & 20 mVp-p
LCD OPEN +TL801
LCD CLOSE+TL8826
(l)Set the color bar tape for adjustment (JiGWR5-SNSP).
(2)Enter the VCR adjustment mode with an adjustment remote control, and select the address 27.
Select the address, using the FF or REW key, and fix it with the PB key. (It will automatically set the playback mode.)
(3)Make an adjustment so as to get 500 mVp-p between SYNC TIP and WHITE PEAK on TL801 or TL8826.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 27.
4. Adjustment of Y-FM carrier f0
Measuring instrument Frequency counter
Mode
VCR STOP
Input signal
No input
Measuring point TL7401
Adjustment address 33
Adjustment level
4.20 + 0.02 MHz
(1)input the no-signal into the video input/output terminal in the VCR STOP mode.
At this time, do not pull out the jack on the Viewcam side.
(2)Enter the VCR adjustment mode with an adjustment remote control, and select the address 33.
Select the address, using the FF or REW key, and fix it with the PB key.
(3)Make an adjustment so that the frequency counter indicates 4.2 MHz on TL7401.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 33.
69
I