Sharp VL-AX1S/H Service Manual page 25

[Making adjustments]
Adjusting the servo system controller and related parts
1. Setting the system codes
Replacement of IC705 E 2 PROM requires the following data to be set in this order.
[Procedure]
Set the unit to the VCR mode and set the data for each address.
Code 1. Model code 2. Destination code 3. Specifications code
Address 01 09 02
Data 00 FF 01
When replacing the IC705 E
(1) Electromagnetic conversion
Address 27 28 2B *105
Data 40 90 90 80
* The address uses only when replacing the IC302.
• Manual adjustment
Mode VCR ADJ mode
Procedure 1) Set the CAM/OFF/VCR selection switch to VCR.
2) Press "CONTINUE" → "VCR adjustment" on the remote controller to set the VCR adjustment mode.
(At this time an indication "VCR ADJ" appears at the left lower side.)
Enter a setting corresponding to the address.
<Setting method>
3) Adjust the address by moving up and down the blinking numeral with the FF and REW key, and fix the address
by pressing the PB key.
4) Adjust to the setting by moving up and down the blinking numeral with the FF or REW key, and set data by
pressing the PB key.
5) Press the STOP key to set the address set state.
6) Repeat the operations 3), 4) and 5) as much as input addresses. After completion of input of all items hold
down the "CONTINUE" key to cancel the VCR adjustment mode.
7) Set the CAM/OFF/VCR selection switch to OFF.
Examples • During E 2 PROM (IC705) replacement.
2. HSWP adjustment
Mode VCR ADJ mode
Procedure 1) Play back the alignment tape in the video mode.
2) Press the "CONTINUE" and "HSWP ADJ" keys on the adjustment remote control in this order.
→ This executes the HSWP adjustment.
When the adjustment is successful, the LCD lights up [OK] and the cassette is automatically ejected. If not
properly adjusted, the LCD lights up [NG].
Examples • During mechanism replacement. • During E
3. SHUT OFF adjustment
Mode VCR ADJ mode
Procedure 1) Load a recordable tape, and set the camera mode.
2) Press the "CONTINUE" and then the "TEST SEL" on the remote control for adjustment to enter the TEST mode (T-01 blinks).
3) Select T-03 with the FF or REW key and then press the PB key. (By the remote control)
4) Observing the power voltage from TL900(-), set it so that TL904(+) obtains 6.00V ± 50mV.
5) Press the playback key on the main unit. Turn off the power and the adjustment is completed.
Examples • During microcomputer (IC704) or E
0A 03 0B
FE 1C D3
2
PROM, first make the following settings and then start the adjustments.
25 26
40 90
2
PROM (IC705) replacement.
4. Menu selection code 5. Software switching code 6. Calendar switching
04 0C 05
00 FF 00
2
PROM replacement (IC302 inside the head amplifier circuit board).
25
VL-AX1S/H/E/EW/EX
0D 07 0F
FF 01 FE