Samsung VP-A12, Service Manual, Page: 41 / 163

Alignment and adjustment
5-2 Samsung Electronics
5-2 Camera Section Adjustment
Note :
1. This system has
1) EVR (Electronic Variable Resistor) control method by D/A converter instead of VR control method.
2) EEPROM to store the confirmed adjustment data.
3) DSP (Digital Signal Process ; ICP05 - Main board) chip to process the signal of camera parts.
4) One test point for the frequency adjustment of DSP main clock (P. CLK).
5) The special mode for camera adjustment using remote control card.
2. Keep in mind
1) Readjustment is needed when the EEPROM (ICA07 of Main board) is replaced.
The reason is that EEPROM stores confirmed adjustment value of each adjustment step.
2) All adjustment steps should be performed using the remote control card.
3) Be sure to perform the adjustment under installing all Assy-Main, CCD, Audio, Front, P.AE, Rear, Terminal
board with the unit because remote module is on Front board.
5-2-1 Preparations
1. Equipments to be used
1) DC Power supply
2) Oscilloscope
3) Frequency counter
4) Vectorscope
5) Waveform monitor
6) Colour monitor or TV
7) Various charts
- Colour bar chart
- Gray-scale chart, etc...
8) Alignment tape (Lion pattern)
9) Remote control card (Part No.: AD59-10379A)
2. Composition of camera P.C.Boards
1) Main PCB 2) CCD PCB
3) EVF PCB 4) CVF PCB
3. Adjustment preparations
1) Remote control card is used as a camera adjust
tool.
2) Press the confirm button when each manual
adjustment step is completed to write the
adjustment data to the EEPROM.
3) After each adjustment step is completed, OSD
shows ÒOK!Ó.
4) To cancel the adjustment mode, remove the power
source.
4. Remote control
The following is a chart explaining the use of each button :
Using Button
START/STOP(CONFIRM)
REW (DATA DOWN)
FF (DATA UP)
STILL (MODE UP)
DISPLAY (MODE DOWN)
STOP (FAR )
PLAY (NEAR)
ZOOM (WIDE)
(TELE)
Adjustment
Data store after finishing adjustment by DATA UP/DOWN button.
When changing data value of adjust state.
Mode change.
Focus adjustment.
Used for manual focus adjustment.