Experts, Learning and Guidance

Ask an Expert Forum Want to replace resistors myself, but need an advice

Experts, Learning and Guidance requires membership for participation - click to join

Actions

Forum Thread Details

State Suggested Answer
Replies 9 replies
Answers 1 answer
Subscribers 238 subscribers
Views 1034 views
Users 0 members are here

Related

See a helpful answer?

Be sure to click 'more' and select 'suggest as answer'!

If you're the thread creator, be sure to click 'more' then 'Verify as Answer'!

Want to replace resistors myself, but need an advice

weiyann83 10 months ago

based on documentation it show 2.2 1/2W J, not sure which resistor i need to replace? any expert can guide me?

Thanks

elektrotanya.com/.../download.html

Top Replies

anniel747 10 months ago +1 suggested

It' a common 2.2Ω 1/2W 5% fusible resistor.

Parents

0 weiyann83 10 months ago

The original resistor appears as shown, and I have observed that it consistently burns R7914 and cracks IC7905. Additionally, I have replaced the 3x power boards over the past four years.

rio
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 robogary 10 months ago in reply to weiyann83

The resistor is likely the victim of another problem. This is the IC7905 spec.

https://www.mouser.com/datasheet/2/328/tny263_268-1512708.pdf

JWx has good ideas. Maybe it needs troubleshooting with a scope to see spikes or maybe one of the surrounding diodes has failed open.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 weiyann83 10 months ago in reply to robogary

Ic i able to find from element14, but fusible resistor same spec i cant find from the element14 any alternative resistor fusible we can use?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Reply

0 weiyann83 10 months ago in reply to robogary

Ic i able to find from element14, but fusible resistor same spec i cant find from the element14 any alternative resistor fusible we can use?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Children

0 acdc90 10 months ago in reply to weiyann83

please check on the secondary of the transformer for shorts across diodes etc

it sounds like each board is less than a year old ( so not warranty)
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel