Service manual

2 ST70 Service Manual
COMMERCIAL IN CONFIDENCE
For information only
For information only
COMMERCIAL IN CONFIDENCE
3. With the Diagnostics menu displayed, use
< or > to select the About
display option, then press
ENTER . Note that the:.
• Temperature should be in the range -30°C to +70°C
• Volts should be in the range 9 V to 16 V
• Peak Volts should be in the range 9 V to 16 V
• Current and Peak Current should be not greater than 220 mA
4. Make a note of any data you need then press
ENTER:
• If you have seen all the available data the display shows the
Diagnostics
menu.
• If there is more data to be displayed, the next page of About Display data is displayed. Repeat step 4
until the display shows the Diagnostics menu.
Self test
The self test function checks basic display, button and buzzer functions. Note that messages displayed during
self test are in Hungarian, to enable production staff to use the test.
To run a self test, ensure the product is switched on, then:
1. With the instrument switched on, press
MENU to display the Main Menu,
then use
< or > to select the Diagnostics option.
2. Press
ENTER to display the Diagnostics menu.
3. Use
< or > to select the Self Test option.
You are now about to start the self test. The initial stages of the self test occur
automatically, so ensure you are ready to observe them.
When you are ready:
1. Press
ENTER to initiate the self test. Check that the following tests run successfully:
i. NVM test. Screen message is Memoria Teszt NVM Teszt.
Shows either PASS or FAIL.
ii. Flash test. Screen message is Memoria Teszt FLASH Teszt.
Shows either PASS or FAIL.
iii. RAM test. Screen message is Memoria Teszt RAM Teszt.
Shows either PASS or FAIL.
2. After the above tests, a button test screen is displayed as follows. Press each front panel button in turn and
check that a tick is displayed for each button pressed.If this occurs, the display shows a pass.
Note: If the buttons are not pressed, this screen times out and shows FAIL , after approximately 15 seconds.
3. Press MENU. Ensure that the next screen is all RED. If there are any black dots, pixels are missing and the
LCD screen should be replaced.
4. Press
ENTER. Ensure that the screen changes to all BLUE. If there are any black dots, the are missing and
the LCD screen should be replaced.
5. Press
ENTER. Ensure that the screen changes to all GREEN. If there are any black dots, pixels are miss-
ing and the LCD screen should be replaced.
6. Press
ENTER. Ensure that the screen comprises vertical black and white lines. If there are any black dots
or missing lines, the LCD screen should be replaced.
7. Press
ENTER. Ensure that the screen comprises horizontal black and white lines. If there are any black
dots or missing lines, the LCD screen should be replaced.
8. Press
ENTER. The screen shows the color palette.
9. Press
ENTER. Ensure that the screen comprises a black screen with a white border. Check that the dis-
play is symmetrical and is square within the display aperture.
10.Press
ENTER. Ensure the buzzer sounds.
11. Press
ENTER. Check that the screen brightness increases in steps, from black to full brightness.
12.Press
ENTER to complete the self test and return to the Diagnostics menu.
13.Press
CANCEL to return to the Main Menu.
14.Press
CANCEL to return to the operational page.
About Display
Press ENTER to select
D10097-1
Run Time
Software Ver.
Bootcode Ver.
Hardware Ver.
Temperature
Volts
Peak Volts
Current
Peak Current
V0.20
V2.00
V0.10
35.20 C
12.16 V
12.26 V
180 mA
195 mA
125.75
D10095-1
Press ENTER to select.
Main Menu
Diagnostics
ENTERCANCEL
MENU