Flange Back Adjustment (Using Mini Pattern Box) - Sony DCM-M1 Service Manual

4. Flange Back Adjustment (Using mini pattern box)

The flange back adjustment of the inner focus lens is carried out automatically.
If deviated, auto focus and manual focus will be disordered.
Mini pattern box with ND filter
Subject
Siemens star chart (Note 1)
Measurement point Check operation on monitor TV
Measuring instrument (Camera-through screen)
Adjustment page 0F
Adjustment address 24 – 29, 36 – 3D
Note 1: Darker Siemens star chart
Note 2: The mini pattern box is used for the flange back adjustment only.
For other adjustments, use the pattern box (PTB-450).
Note 3: For the data display, the data at the time when address was set is displayed, and it is not updated.
Check data variation while repeating address change and resetting (change address from "02" to "01", and then return it to "02").
Preparation for adjustment
Install the mini pattern box as shown below.
Note 4: The attachment is not used.
Specified voltage: Variable depending on the mini pattern box.
Therefore, set the voltage given on the sheet
attached to the mini pattern box.
Adjusting method
Page Address
Steps
1
2
3
4
5 06 02
6 06 01
7 06 01
8 06 02
Processing after completion of adjustment
Page Address
Steps
1 06 01
2
Data
Install the mini pattern box so that it is located within 3 cm from the lens front surface.
Adjust the height of mini pattern box.
Check that the output voltage of regulated power supply is the specified voltage
± 0.01 Vdc.
With the zoom lens at TELE end and WIDE end respectively, check that the center of the
shot image screen concurs with the center of Siemens star frame.
Check that the data is "00".
Press the y key.
13
Press the y key.
27 (The flange back adjustment is carried out, and the data are automatically entered to
page: F, address: 24 – 29 and 36 – 3D.)
Check that the data becomes "01". (Note 3)
Data
00 Press the y key.
Perform "Flange Back Check".
Mini pattern box
Specified voltage ( 0.01 Vdc)
Output current over 3.5 A
Red (+)
Black (–)
Yellow (SENS +)
White (SENS –)
Black (GND)
Fig. 7-3-12
Work Description
Work Description
– 11 –
Within 3 cm
Set
Camera
base
Regulated power supply
No connection