Sky-Watcher SynScan V4 Hand Controller - Manual (Page 44)

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APPENDIX II : SYNSCAN SELF-DIAGNOSIS
The SynScan hand control contains a built-in self-diagnosis program. To run a full test, users
should prepare a “Loop-Test Plug” by referring to Appendix 3 and the following instructions:
• Short the pin-2 (TX_RS232C) and pin-5 (RX_RS232C) of a RJ-12 plug.
Here are the diagnosis steps:
1. Insert the “Loop-Test Plug” to the RJ-12 port of the SynScan hand control.
2. Press “ 2 ” and “ 5 ” simultaneously and power on the hand control.
3. The hand control will display “ SynScan B.I.T. ” for a short time.
4. The LCD will display “LCD CONTRAST x-yy“, press ENTER button to continue.
5. The LCD screen will become fully black and then fully clear for a while for the purpose of
checking the LCD display.
6. If there is any problem for the RS-232C function on multi-purpose port (the RJ-12 outlet)
or no Loop-Test Plug connected to the multi-purpose port, the screen will display “ COM1
ERROR ”. Press ENTER to continue.
7. Ignore “ COM2 ERROR ” message and press ENTER to continue.
8. If everything is fine, the testing will go to Step 9 ; Otherwise, the SynScan hand control will
show “ EEPROM ERROR ” or “ Flash ERROR ”. Press ENTER to continue in such case.
9. Check keypad and other features:
• The screen will display “ Key= ” in the top row. If a key is pressed, the name of the key
will be displayed.
• The power voltage will be displayed on the bottom row of the screen.