Sanyo HV-DX3E Service Manual page 7

TROUBLESHOOTING
2. SYSTEM CIRCUIT
A. LED DISPLAY
No LED display.
NO
Is 5V obtained at IC701
Check R588, D857, L503, L860
pin #9, 25?
YES
NO
Oscillation at IC701pin #1? Exchange IC701.
YES
Specific GRID/SEG doesn t function.
YES
NO
Check IC 701 pin #22~24, 27,
GRID output at PORT of IC701?
28, 30, 31.
YES
NO
SEG output at PORT of IC701?
Check IC 701 pin #10~12, 14~21.
Exchange IC701.
6