Hitachi VIV-E553LE - Vcr Section Adjustment

3. VCR SECTION ADJUSTMENT
3.1 Test Equipment and Alignment Tapes
Necessary for Adjustment
Test Equipment
Digital Voltmeter (DVM)
Color Video Monitor
DC Power Supply (DC 0 - 7V/3A)
DC Power Supply (DC 5V/1A)
Alignment Tape, etc.
Adjustment Floppy Disk
Personal Computer
Personal Computer 9-pin or 25-pin (RS232C) Cable
DSP-R Jig
DSP AV Output Jig
ODC DC Cord
Alignment Tape
Blank Tape
3.2 Adjustment Condition
1. Check that the camera, LCD monitor and EVF sections
has been adjusted correctly before adjusting the VCR
section.
2. Connect this unit, a power supply and a color video
monitor as shown in Fig. 1-1.
3. Use the 10:1 probe of the oscilloscope when other not
specified.
4. When "Record mode" is specified, load a blank tape and
set the 8mm video camera/recorder to the record mode
by the following procedure.
1) Set the CAM/OFF/VCR switch to the CAM position.
2) Press the REC START/STOP button on the unit (or
REC START/STOP button on the remote control).
5. Earth of test equipment: Pre-Amp Shield (GND).
Caution:
1. This camera/recorder will not perform the eject operation
unless the LCD monitor is open. To set it to the eject
state with the case dismantled, short PG905 pins 1 and 2
on the VCA board with a shorting clip, etc., and then
press the EJECT button.
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3.3 Preset Positions of Switches and
Controls During Adjustment
CAM/OFF/VIDEO switch ------+-+-+++++ "VCR" position
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3.4 Check After Replacing Major
Components in the VCR Section
After replacing major components, perform checks, referring
to the table below.
The following table shows the minimum adjustments
required after major components are placed.
The table below may not apply when several components
are replaced, depending on the symptom of the defect.
Caution: After replacing the parts, check each adjustment.
If you find the items necessary to be adjusted,
remove the corresponding laser trimming
resistors and replace them with variable resistors
for adjustment.
NAME OF MAJOR COMPONENTS
VCA
Circuit
ITEM] NAME OF
ADJUSTMENT
Board
SYSTEM CONTROL/SERVO CIRCUITS ADJUSTMENT
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level Adjustment
(2) |Head Switching
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