Lenovo C52 manual Troubleshooting, Servicing, Signal Connector Information

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TROUBLESHOOTING

If your monitor fails to operate functionally, it may be possible to correct the problem by making simple checks as follows:

Problem

Check & Adjust

 

 

 

Blank screen

 

Monitor power switch,

(* note.)

 

power cord, signal cable,

 

 

or connector

 

 

PC power switch

 

 

Brightness & contrast

 

 

controls

 

 

 

Display position

 

Vertical centering &

off-center

 

horizontal phase controls

 

 

 

Display too small

 

Vertical & horizontal size

or too large

 

controls

 

 

 

Display too bright

 

Brightness & contrast

or too dim

 

controls

Refer to the operation instructions for your computer/ video adapter to ensure that you have the correct signal output source for the monitor. Ensure that the switches on the video adapter are set correctly for operation with this monitor.

If the above steps fail to correct the problem contact your dealer for servicing by qualified service personnel.

Please remember that the monitor should be returned for servicing together with the power cord.

*Note: You can easily distinguish the problem is on the monitor or on the computer by using the monitor’s built-in selftest function.

With the monitor power ON, disconnect the signal cable from monitor. If there is no image on the monitor screen, disconnect the signal cable. If a full-white image is diaplayed on the screen, the monitor is function properly, and the problem is at PC side, or signal cable.

SERVICING

Refer all servicing to qualified service personnel.

Serious shock hazards exist within the covers of this monitor.

Do not open the covers under any circumstances- there are no serviceable parts inside.

SIGNAL CONNECTOR INFORMATION

15

 

 

 

15

 

 

 

 

Pin

Function

Pin

Function

 

 

 

 

1

Red signal

9

NC

 

 

 

 

2

Green signal

10

Digital ground

 

 

 

 

3

Blue signal

11

Ground

 

 

 

 

4

Ground

12

SDA (DDC1/DDC2B)

 

 

 

 

5

* (Note)

13

Horizontal

Synchronization

 

 

 

 

 

 

 

6

Red return

14

Vertical synchronization

& VCLK (DDC1)

 

 

 

 

 

 

 

7

Green

15

SCL (DDC 2B)

return

 

 

 

 

 

 

 

8

Blue return

 

 

 

 

 

 

*Note : This pin is used for self test detection; at PC side, this pin has to be connected to ground.

N O SIGN AL

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Contents Information to Users Instruction to UsersRemarks Power Saving IntroductionInstall Monitor Power CordUser Controls and Indicators Using the ON-SCREEN Menu Adjustment screen example horizontal position adjustmentIndividual Adjustment DISP. Freq Input frequency display Color selectionLanguage selection Servicing TroubleshootingSignal Connector Information Technical Specifications R IPreset Modes