Samsung SyncMaster 170T Service Manual page 12

5 Troubleshooting
5-2 No Video [Analog]
Check signal cable and connection.
Does the digital video signal appear
at the Pin 34, 35, 39, 40, 42, 43, 45 and 46 of IC601?
Yes
Is the output of Pin 1, 19 of IC602 High?
No
Check IC602 and related circuit.
No
Does the input signal appear at Pin of 76, 77, 78,
80 of IC601 (LDTGB, LVSYNCB, LHSYNCB, LCKBB)
No
Does the analog video signal appear at
R200,R201, R202? (BLUE, GREEN, RED)
Yes
Does the sync signal appear
at the output of Pin 18, 14 of IC 244 ?
5 6
Yes
Does the input signal appear at the Pin 40, 41 of
Yes
During power on-off, does the input signal
appear at the Pin29,30 of IC300?
Yes
Do the clock and sync signal appear at Pin115,
117 of IC 300?
A_MX_HSYNC) and does the digital video signal
appear at the output port PDA, PDB)?
Yes
During power on-off dose the input signal
appear at the R 410 and R 411 ?
5-2
15 16 17 18
1 2 3 4
(V_SYNC, H * V_SYNC)
IC 300?
7 8
(PLL H * V, MX - PDEN)
(AD - SDA, AD - SCL)
(A_DCLKAB,
9 10
(MX - SDA, MX - SCL)
Yes
Check TFT-LCD panel and Inverter.
Yes
replace IC601
No
Check PC Signal
No
Check IC244 and related circuit.
No
Check the related circuit
for these ports
No
Check IC501 and related circuit.
No
Check IC300 and related circuit.
No
Check IC501 and related circuit.
SyncMaster 170T/180T