FSC B15-1A Service Manual
29
8.2 Trouble Shooting
8.2.1 Main Board
1.NO SCREEN APPEAR
Note: 1. if Replace “
MAIN-BOARD
” , Please re-do “DDC-content” programmed & “WHITE-Balance”.
2. if Replace “
Power Board
” only, Please re-do “ WHITE-Balance”
Measured U021 pin 2 =2.5 V?
Measured U202 pin 2= 3.3V?
Measured CN201pin 2 = 3.3V?
Ch
eck Correspondent component.
Is there any shortage or cold
Yes, all DC level exist
Disconnected the Signal cable( Loose the
Signal cable ),Is the screen show “No
Signal go to sleep
?
Replace U601
MCU
No, nothing is show
Connected the Signal cable again,
Check LED status.
Check Power switch is in
Power-on status , and check if
Power switch had been stuck ?
Led Orange
OK, Keyboard no stuck
Led orange
Led Green
Check the Wire-Harness from CN503
Measured RGB (R301,R302,R303)
H,V Input at R310,R311 was there
have signal ?
C
heck
Correspondent
component
short/open
( Protection Diode )
and Signal cable bad ?
NG
OK ,Wire tight enough
Check Panel-Power Circuit Block
OK, Panel Power
Check U401 Data-output Block
OK, U203 data OK
Replace Power board and Check
Inverter control relative circuit
Re-do White balance
OK , Input Normal
Measured Crystal X401(14.318MHz)
OK, clock normal
Replace U401 (MST8011B)
OK
No LED
Summary of Contents for FSC B15-1A
Page 14: ...FSC B15 1A Service Manual 14...
Page 17: ...FSC B15 1A Service Manual 17 5 3 Electrical Block Diagram 5 3 1 Main Board...
Page 18: ...FSC B15 1A Service Manual 18 5 3 2 Inverter Power Board Inverter Block Diagram...
Page 19: ...FSC B15 1A Service Manual 19 Power Block Diagram...
Page 25: ...FSC B15 1A Service Manual 25 7 PCB Layout 7 1 Main Board 715L1225 C...
Page 26: ...FSC B15 1A Service Manual 26...
Page 27: ...FSC B15 1A Service Manual 27 7 2 Inverter Power Board 715L1063 1A...
