XV-Z9000E (serv.man3). Service Manual - Part 2 - Troubleshooting (32-48) - Sharp Projector Service Manual (repair manual). Page 17

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48
XV-Z9000U/E
YES
YES
YES
NO
Checking the 
Component and RGB 
Inputs
Are there signals at pins 
(34), (36) and (38) of 
IC2505?
Check the line from 
Q2525 through Q2523 to 
Q2524 and its peripheral 
circuits.
Check the line between 
Q2518 and Q2520 and its 
peripheral circuits.
Check the board-to-board 
connections or the 
circuits that follow the PC 
board.
NO
YES
Are there signals at pins 
(56/26), (58/28) and 
(60/30) on the board-to-
board section of P3580?
NO
There are no RGB colors.
NO
Check the signal input 
circuit or IC2505 and its 
peripheral circuits.
Check the circuit of the 
color that fails to appear.
YES
NO
Are there signals at pins 
(3), (5) and (6) of IC2507?
YES
There are no RGB colors.
NO
Check the line between 
Q2509 and Q2517 and its 
peripheral circuits, or 
IC2507.
Check the circuit of the 
color that fails to appear.
Are there signals at pins 
(49/19), (51/21) and 
(53/23) on the board-to-
board section of P3580?
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