Sanyo DP26648 Service Manual - Page 38

Troubleshooting Flow Charts

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NO POWER TROUBLESHOOTING FLOW CHARTS Is Yes fuse open? Check: Power Unit No Is the voltage to "5V_STBY" line supplied? No Check: Power Unit Yes Is the voltage to all lines supplied? No: All 0V (except '5V_STBY' line) Check: arround CPU (IC800), IC (IC801), Crystal (X801), Power Unit Yes (or the voltage to some lines is not supplied.) After a few seconds, the set will be switched off. Check 'Power Failure' Circuit. Power Failure Line CPU (IC800) 32pin Q810, Q811 Diod D1671 D6052/D6053 D1620/D1621 D1662 D1653 D1679 Detected Voltage 9V 3.3V D3.3V 5V 6.5V AUDIO_POW CPU (IC800) 23pin Diod D1683 - 38 - Detected Voltage LVDS_P OW

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TROUBLESHOOTING FLOW CHARTS
NO POWER
No
Yes
Yes
Yes
No
(or the voltage to some lines is not supplied.)
After a few seconds, the set will be switched off.
Check 'Power Failure' Circuit.
No:
All 0V
(except '5V_STBY' line)
Is
the voltage to all lines
supplied?
Is
the voltage
to "5V_STBY" line
supplied?
Is
fuse open?
Check: arround
CPU (IC800), IC (IC801),
Crystal (X801), Power Unit
Check: Power Unit
Check: Power Unit
Diod
Detected Voltage
Diod
Detected Voltage
D1671
9V
D6052/D6053
3.3V
Power Failure Line
CPU (IC800) 32pin
D1620/D1621
D3.3V
D1662
5V
D1653
6.5V
D1679
AUDIO_POW
Q810, Q811
LVDS_POW
D1683
CPU (IC800) 23pin