
2008-03-14
LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
115
42” TROUBLESHOOTING TABLE
Power unit operation check.
↓
LINE_FILTER_UNIT:
↓
YES
POWER_UNIT
↓
YES
↓
YES
↓
YES
↓
YES
↓
YES
Are the power cord and harness in the unit properly connected?
NO
Connect the power cord and harness properly, and turn on the
power.
Is F901/F902 normal?
NO
LINE_FILTER_UNIT:
Isn't RV901,C901,L901,C904,C902,C903,L902,RV903, etc. out
of order? Moreover, whether the short-circuit with the
circumference circuit is checked.
POWER_UNIT:
BD901, FB905, C910, etc. out of order?
Moreover, whether the short-circuit with the circumference circuit
is checked.
Is BD901 (+320V) output? (Set the main power SW to OFF.)
Does the PFC circuit operate normally?
(L906, Q901, D902, D903, IC901 and etc. And, the circuit around
the protection circuit etc. is checked.)
NO
Is a voltage of +5V applied to pin (12,13) of connector (CN902)?
(Set the main power SW to OFF.)
Does the switching circuit operate normally?
Check circuit around the primary side (T901, IC931, Q931,
ZD931, ZD930, ZD980, ZD981, etc.), the secondary side (D935,
L980, etc.), the AC_DET circuit (IC932, IC982, etc.), and the
protection circuit.
NO
Are +24V output as for the power on/off switch when it is on?
NO
Does the inverter circuit operate normally?
Check circuit around the primary side (T902,Q951,Q952,IC951,
D951,D952, etc.), the secondary side (D955, C943, etc.), and the
protection circuit.
Similarly, is +12V output as for the power on/off switch when it is
on?
NO
Check +12V circuit of D962, L931, etc.
Are +88V output as for the power on/off switch when it is on?
NO
Does the inverter circuit operate normally?
Check circuit around the second side (L907, Q991, D985, IC902,
Q903 etc.)
Summary of Contents for LC-19LE320
Page 142: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 142 ...
Page 324: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 324 4 19 PACKING PARTS ...
Page 326: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 326 4 22 PACKING PARTS ...
Page 328: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 328 26 PACKING PARTS ...
Page 330: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 330 32 PACKING PARTS ...
Page 332: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 332 37 PACKING PARTS ...
Page 334: ...LC 19LE320 LC 22LE320 LC 26LE320 LC 32LE320 LC 37LE320 LC 42LE320 334 42 PACKING PARTS ...
Page 337: ... ...
Page 338: ... 01 2 2 2 3 3 2 4 156 78 4 4 156 78 4 4 4 2 2 9 2 2 2 2 2 2 9 2 2 2 2 53 2 2 2 2 2 2 2 2 2 2 ...
Page 339: ... 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...
Page 340: ... ...
Page 341: ... 01 2 2 2 3 3 2 4 156 78 4 4 156 78 4 4 4 2 2 2 9 2 2 2 2 2 2 ...
Page 342: ... 9 2 9 2 2 2 2 2 2 53 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...
Page 343: ... 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...
Page 344: ... 0 ...
Page 345: ... 0 0 123 4 0 4 0 4 0 5 6781 9 5 5 67 1 9 0 272 2 5 5 0 5 ...
Page 346: ... A ...
Page 347: ... 0 12 3 1 4 ...
Page 348: ... 5 6 78 9 ...
Page 349: ... 6 0 6 0 6 0 6 0 6 0 6 0 6 0 6 0 6 0 ...
Page 350: ... ...
Page 351: ... ...
Page 352: ... ...
Page 353: ... A A A ...
Page 354: ... 0 0 1 2 3 ...
Page 355: ... 4 0 5 6 6 78 9 6 ...
Page 356: ... 6 6 6 6 6 6 6 6 6 5 5 5 5 5 5 5 5 5 ...
Page 357: ... 6 6 6 6 6 6 6 6 6 6 6 6 ...
Page 358: ... 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 ...
Page 359: ... 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 ...
Page 360: ... 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 A A A ...
Page 361: ... 0 1 2 ...
Page 362: ... 3 4 5 6 6 78 9 6 ...
Page 363: ... 6 6 6 6 6 6 6 6 6 5 A B 5 B 5 A B 5 A B 5 A B 5 B 5 A B 5 A B 5 B ...
Page 364: ... 6 6 6 6 6 6 6 6 6 6 6 CC5A 6 ...
Page 365: ... 6 6 6 6 6 6 6 6 6 6 D 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 ...
Page 366: ... 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 ...
Page 367: ... 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 E E E ...