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Sharp OZ-770PC Service Manual page 8

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4. EXPLANATION OF DIAGNOSTICS AND CHECK ITEMS
NO.
CHECK ITEM
1
Start
Power SW ON
Reset while Pressing ESC+D
2
LCD Check
Push 1 key
Push ENTER key
Push ENTER key
Push ENTER key
Push ENTER key
3
PCB Check
Push '2' key
Push ENTER
4
KEY Check
Push '3' key
Push all key
5
Backlight check
Push '4' key
6
Low Battery Check Push '6' key
Drop the operating Volt. 2.5V
Drop the operating Volt. 2.1V
Drop the operating Volt. 1.7V
7
H Send Check
Connect the OZ/ZQ-700
series unit to PC Push '7'
8
Uart Echo Check
Connect the OZ/ZQ-700
series unit to PC & run rest
Cradle PC program.
CHECK METHOD
(Diag Menu, Page 1 of 5)
1. LCD CHECK
2. PCB CHECK
3. KEY CHECK
4. BACKLIGHT CHECK
5. FINAL CHECK
6. LOW BATT. CHECK
7. H SEND CHECK
8. UART ECHO CHECK
ROM Ver. Vx,x
(Frame Pattern)
(Checked Pattern 1)
(Checked Pattern 2)
(Contrast Check)
Dark
Light
SRAM CHECK.....
ROM CHECK.....
ALARM TONE TEST.....
45 (hex) different characters and the no.
of keys are displayed.
BackLight is on & no indication
LOW BATTERY CHECK
LOW BATTERY CHECK (no change)
CAUTION!
IT IS LOW BATTERY.
FATAL WARNING.
IT IS NO BATTERY
HHHHH.......
HHHHH.......
:
:
UART CHECKING.......
Press CANCEL to quit
DISPLAY
Displayed Frame Pattern
Displayed Checked Pattern 1
Displayed Checked Pattern 2
Displayed Rain Drop Pattern 2
No Rain Drop
(Rain Drop)
Contrast changes smoothly to black out,
fades out, then returns to the initial level.
Time
Test OK should be seen, or a error alarm
tone would be heard.,
When push a key, one of corresponding
characters will be disappeared and the no.
of key will be decrement by one.
Keyboard will be OK only if all characters
had been disappeared after all keys had
been pressed.
on time...30sec
Press CANCEL to exit
Check 'H' displaying to PC Monitor
Test OK should be seen.
CRITERIA or NOTE

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