Sharp VL-SW50U Service Manual page 42

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Types of test modes
1 TEST No. 1 Title
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Contents 1 Sensor on/off 1
Sensors off All sensors but the cassette controller switch, dew sensor
and battery sensor stay off.
Automatic battery sensor Battery sensor's input voltage put in memory.
adjustment
Battery adjustment error Battery sensor's adjustment errors are displayed at the
display
right of the "past errors" area.
All sensors on
All but sensors
on
' 5 PASS mode
Track shift mode (l/4 shift) All sensors on
6 Camera adjustment mode Camera adjustment mode [VCR
interrupted]
7
8
VCR adjustment mode VCR adjustment mode
Automatic switching point Play standard tape and call this mode. Switching point is
adjustment (STOP ADJ)
automatically adjusted.
@ When the battery adjustment mode is selected from the camera adjustment mode with a cassette with the erase
protection tab, the VCR is automatically put in the REC mode.
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Below discussed are these seven test modes.
@ [TEST No. I] Sensors off mode
All the sensors, except for the cassette controller switch, dew sensor and battery sensor, stay off. This
enables to bring the VCR in the loading mode without tape. The VCR/camera performance can now
be checked with no tape inside.
@ [TEST No. 31 Automatic battery alarm adjustment
Used to automatically adjust the voltage level which makes the "battery" appear on the LCD display.
@ [TEST No. 41 Battery alarm check/error display
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The difference between the preset battery alarm voltage and the current supply voltage is displayed
as follows.
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A past error is displayed at the right of the current battery alarm error.
@ [TEST No. 51 PASS mode
Used to adjust the tape travelling condition. The tracking is shifted by l/4 from the center to make the
tape running-related RF envelope fluctuations easier to observe.
@ VEST No. 61
@ [TEST No. 71
0 [TEST No. 81
Camera adjustment mode
Used to adjust the camera section. (For details, see Servicing the Camera Section.)
VCR adjustment mode
Used to adjust the VCR section. (For details, see Servicing the VCR Section.)
Automatic switching point adjustment
Used to automatically adjust the playback switching point. (For details, see Automatic Adjustment of
the Playback Switching Point.)
6-l-4-2. Setting up the VCR section adjustment mode (camera section adjustment)
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Select adjustment items by using addresses. Rewrite the adjustment data to change the settings.
Below shown the adjustment procedures and on-screen display.
Enlarged view
(CAM ADJ) camera -----
V ADJ+VCR,?=bD
00
00
(Address) (Data)
---'--------________,
;VADJi
100 [
___________________a
T-07
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