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ELECTRICAL ADJUSTMENTS
Method of using Jig remote controller.
Most of the video circuits and deflection circuit of this set can be adjusted by using the jig remote controller [RC-AVC01].
The jig remote controller RC-AVC01 has two operating modes. One is the "Normal" and the other is the "Test" mode. Either the 'Normal' mode or 'Test' mode can be selected by shot-circuiting or opening the shorting land of the printed foil pattern.
The 'Test' mode of the jig remote controller is used for adjusting the set.
The 'Normal' mode and 'Test' mode are selected as described below.
Disassemble the jig remote controller and locate the shorting land [J1] & [J2] on the foil pattern of the printed circuit board.
Normal Mode => (J1) shorted. (J2) open.
Test mode => {J1} open. {J2} shorted.
When the remote controller enters the 'Test' mode, its 'Repeat' key becomes the 'Test' key, and the 'Caption' key becomes the 'Finish' key. All keys other than the above two keys are (disabled), so that the remote controller will not operate even if any other key than those keys is pressed.
When the word the TEST key or FINISH key is written, it means that the REPEAT key must be pressed instead of the TEST key, and CAPTION key must be pressed instead of FINISH key respectively on the actual jig remote control.
AGING MODE
To enter aging mode, press 'Test' key.
- When this set enters the aging mode, the Auto Power Off function that runs Off the main power when the input signal is disconnected, is disabled.
- The aging mode is used for aging of the set before starting the CRT adjustment.
- When this set enters aging mode, the following will be the display.
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AGING : AFT OK : 0000H : US21
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Here;
US21 = Destination of the distinction switch.
0000H = CRT operating hours.
AFT = AFT S-Curve Status.
ACCUMULATIVE OPERATING HOURS OF [CRT ON]
The operating hours of CRT On are accumulated in units of hour and are displayed in hexadecimal notation. For example:
1234H = (1x16x16x16) + (2x16x16) + (3x16) + (4) = 4660 Hours.
When accumulating operating hours exceed (7FFFH) ie [32768 Hours], the display returns to (0000H).
DISTINCTION SWITCH DESTINATION SETTING
The destination and picture size setups that are set in this set are displayed.
TO CHECK AND SET THE DISTINCTION SWITCH
- Press the 'Test' key to enter aging mode.
- Press 'Display' key to let the "distinction" switch appear on screen.
- Check that "1: US21" is shown in Red among US 21 to 6: TW 25. If "1:US 21" is not shown in red, press the numeric ten key "1" on the key board so that "1 : US21"is shown in Red.
- Check the data contents of the address from 0 to F. Confirm that the data contents of the addresses from 0 to F are identical what are shown in the illustration, select the data that you want to correct using "Ch Up / Ch Dn" key and change the value (0 to 1) of selected data using the "Vol Up / Vol Dn" key.
- When data input is complete, press the "Finish' key.
- If pressing the 'Finish' key the message "Initializing" appears on the screen. This set enters the standby state in eight seconds. When does this operation, channel presetting etc: are initialized. If 'Test' key is pressed, without the initialize being done the 'Aging' mode ends.
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1 : US 21
2 : TW 21
3 : NH 21
4 : NH 25
5 : US 25
6 : TW 25
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0
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