Repairing CRT Monitor G2 Problems

 

Jaketronics Computers & Electronics Repair Services
Jaketronics Computers & Electronics Repair Services

Technicians Report Log

TRL No.

0902-1

TRL.Blank.doc

Name

Department

Date / Time

Yanjuan

Savlon Security Services

Sat. 14/02/09 12:39pm

Job Description:

Monitor no display problem.

Equipment Description:

Pecom NH570 15” CRT Colour Monitor (Black)

Diagnosis:

-Arc welding was in progress outside when monitor became faulty.

-User noticed a change in colour to yellowish display and then blank (no display).

Troubleshooting:

-Switched on. High voltage present. Heard and felt static on monitor glass.

-. Green power led blinking.

-No display while connected to desktop

-Opened cover to check for burnt components. Nil.

-Checked G2 voltage. Zero.

-Removed G2 line from CRT board and checked voltage. 299VDC.

 

Fault:

Power surge caused blue resin coated High Voltage ceramic capacitor (103, 2KV) to short out.

 

Remedy / Recommendations:

-Voltage check on CRT board and G2 circuit.

-Direct replace blue resin coated High Voltage ceramic capacitor (103, 2KV)

-Powered on monitor and connected to Desktop. Windows xp logo displayed.  Problem Solved.

Date / Time Accomplished:

Sat. 14/02/09 1:00pm

 

Note:  Thanks to Jestine Yong www.jestineyong.com I was able to fix this monitor.

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Published by

Jakeman's 10-20

"When the power of love overcomes the love of power, the world will know peace." - Jimmy Hendrix (1942 - 1970)

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