LL-T2010W (serv.man15). Troubleshooting - Sharp Monitor Service Manual (repair manual). Page 2

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LL-T2010W
TROUBLE SHOOTING
4 – 2
(No)
(Yes)
Is D23 cathode at DC+3.3V?
Check the DC+3.3V power line and the 
IC21 peripheral circuits. 
Check the DC+2.5V power line and the 
IC22 peripheral circuits. 
Check the POWER_CTL signal and 
IC18 peripheral circuits. 
Check the RESET circuit in the 
peripheral of IC16. 
Check the peripheral circuits of IC24 
X1.
Check the clock circuit in the peripheral 
of IC6 X2. 
Check the analog signal cable and CN1 
(CN2).
Check the peripheral circuits of IC3 and 
IC4.
Execute      . Microcomputer circuit 
check/GM5060
Check the peripheral circuits of IC2. 
Check the peripheral circuits of Q7.
Check the MAINPW signal and wiring 
between CN5 the main SW on the SW 
PWB.
(No)
(Yes)
Is D25 cathode at DC+2.5V?
(No)
(Yes)
Is the voltage across the fuse F4 
DC+12.0V?
(No)
(Yes)
Is the positive side (no connection of part) 
of C145 at H level (DC+5V)?
(No)
(Yes)
Is the FB15 level changed by turning 
on/off the POWER SW?
(No)
(Yes)
Is the output level of Q7 (connected with 
R35) at L level (DC+0V)?
(No)
(Yes)
Is IC15-21PIN oscillating?
(No)
(Yes)
Is X3's PIN on C111 side oscillating?
(No)
(Yes)
Are the signal waveforms of R35 and R37 
(R25, R28) normal?
(No)
(Yes)
Is the signal waveform of R45 (R34) 
normal?
(No)
(Yes)
Are the signal waveforms of R74 and R76 
normal?
When R94 and R95 are disconnected, 
are the waveforms on IC8 side normal?
Check the DCLK  DEN line. 
(No)
Replace IC8. 
(No)
Are the signal waveforms of R94 and R95 
normal?
(Connect the cable of CN10 and CN11.)
(No)
(Yes)
(Yes)
(Yes)
Are the signal waveforms of test pins 
TP22 and TP23 normal? (The cable of 
CN10 and CN11 at the back can be 
disconnected.)
Continued from
2
5

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