Service manual
6-3
VL-H870U
VL-H875U
VL-H890U
VL-H870U
VL-H875U
VL-H890U
6-3-2-2. Setting up the VCR section adjustment mode (camera section adjustment)
• Select adjustment items by using addresses. Rewrite the adjustment data to change the settings.
Below shown the adjustment procedures and on-screen display.
Procedural steps
1 Turn up or down the flashing hexadecimal number with the FF or REW key to select the V ADJ
address of a desired adjustment item. (Initial address: 00H)
Note: The addresses change as follows. 01FE 01FF 0000 0001 0002
2 Press the PB key to read the data of the selected address. V ADJ
002C A3
3 Turn up or down the data setting with the FF or REW key. The data display starts flashing. V ADJ
002C
4 Press the PB key again to write the data setting into the selected address. V ADJ
002C 72
5 Press the STOP key in the above step 2 or 4, and the screen returns back to the step 1. V ADJ
Display
( : flashing)
When the FF or REW key is held down for 0.3 second or longer, the address selection is repeated in cycles of 100 msec. The data
setting changes by ± 4 by holding the key down for 2 seconds or longer.
• Below discussed are these seven test modes.
1 [TEST No. 1] 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.
2 [TEST No. 3] Automatic battery alarm adjustment
Used to automatically adjust the voltage level which makes the “battery” appear on the LCD display.
3 [TEST No. 4] Battery alarm check/error display
• The difference between the preset battery alarm voltage and the current supply voltage is displayed as follows.
• A past error is displayed at the right of the current battery alarm error.
4 [TEST No. 5] PASS mode
Used to adjust the tape travelling condition. The tracking is shifted by 1/4 from the center to make the tape
running-related RF envelope fluctuations easier to observe.
5 [TEST No. 6] Camera adjustment mode
Used to adjust the camera section. (For details, see Servicing the Camera Section.)
6 [TEST No. 7] VCR adjustment mode
Used to adjust the VCR section. (For details, see Servicing the VCR Section.)
7 [TEST No. 8] Automatic switching point adjustment
Used to automatically adjust the playback switching point. (For details, see Automatic Adjustment of the
Playback Switching Point.)
TEST No. Sensor on/off
• Types of test modes
Title
Contents
1 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.
1 Sensors off All sensors but the cassette controller switch, dew sensor and
battery sensor stay off.
3 Automatic battery sensor Battery sensor’s input voltage put in memory.
adjustment
4 Battery adjustment error Battery sensor’s adjustment errors are displayed at the right of All sensors on
display the “past errors” area. All but sensors
on
5 PASS mode Track shift mode (1/4 shift) All sensors on
6 Camera adjustment mode Camera adjustment mode [VCR
interrupted]
7 VCR adjustment mode VCR adjustment mode
8 Automatic switching point Play standard tape and call this mode. Switching point is
adjustment (STOP ADJ) automatically adjusted.
V ADJ
0000 00
T-07
Enlarged view
(CAM ADJ) camera
V ADJ VCR, LCD
0000 00
(Address) (Data)