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VL-A111S/H/E/AH131S/H/E
VL-AH151S/H/E
5-5. Battery shutoff voltage adjustment
1) Supply power to the main unit, using the variable-voltage DC power supply (range of 2.5V to 5.0V).
2) Set the CAM/OFF/VCR SW to CAM to switch to the camera mode.
3) Load a recordable tape and set the main unit to CAM REC. PAUSE.
4) Set the main unit to TEST mode No. 3, and start recording.
5) Measure voltage between TL2911(+) and TL2914(GND), and adjust the supply voltage to 3.1V.
6) The adjustment is complete if "BATTERY" is displayed on the monitor screen for a second when the PLAY key of operation unit
is pressed.
7) The adjustment is regarded as proper if the auto shut-off is actuated after the warning is displayed when the TEST mode is cancelled.
* In case of automatic adjustment of shut-off voltage, adjustment is impossible if voltage is above 3.1V ± 0.2V.
If the adjustment is made at 2.9V or below, the low-voltage operation may become unstable.
5-4. TEST mode
TEST No. Title Contents
1 Sensor Off All the sensors are off except for the cassette control switch, DEW sensor, and battery
sensor.
2 Mecha Adjustment mode ATF sampling is restricted to the central part.
3 Shut Off Adjustment Shutoff voltage value is written in E
2
PROM.
4 Error Display —
5 PASS mode Track shift (1/4 shift)
6 Cam Adjustment mode —
7 VCR Adjustment mode —
8 Head Switching Point ADJ. If “TEST 8” is selected for normal tape playback, Head Switching Pint is automatically
adjusted.
Note: If “T-03” is selected in the CAM mode while a recordable tape is loaded, the unit starts recording automatically.
T-01
1 Select No with “FF” or “REW” key.
2 Confirm with “PB” key.
• Measuring instruments:
*Color monitor TV set *Oscilloscope *DC cable (AC adapter accessory)
*Digital voltmeter *Frequency counter *Video extension cables
*DC power supply *Signal generator *Vector scope
*Audio generator (CR oscillator) *AV output cable (accessory) *AC adapter
*Alignment tape (JiGWR5-5CSP) *Video recording tape
(JiGWR5-8CSE) (For Y/C, audio and servo adjustments)
5-6. VCR section adjustments
5-6-1. VCR section adjustments jigs
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