Burned resistors R5-4.7?; R6-470?; R7-1k? and R8-0.68?. Of course, I replaced them and additionally I replaced the 2SK3567 transistor. The charger is still not charging.

There is no voltage to the UC3842BN. Capacitors and diodes are functional.

Sure, I'm curious what a miracle you haven't checked, for example R7, R8 is just for the look

Because the topic is not closed, let me add that in addition to the above. components must be replaced with UC3842. I had the same case. And the reason was the dried 82uF / 400V capacitor. The topic can be closed.

Hitachi UC18YG Charger Issues: Replaced Burned Resistors and 2SK3567 Transistor, Still Not Charging

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#1 16436897 25 Apr 2017 22:42

mekoy mekoy

Level 13

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Post #1
16436897 25 Apr 2017 22:42

Burned resistors R5-4.7?; R6-470?; R7-1k? and R8-0.68?. Of course, I replaced them and additionally I replaced the 2SK3567 transistor. The charger is still not charging.
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#2 16448119 01 May 2017 17:24

mekoy mekoy

Level 13

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Post #2
16448119 01 May 2017 17:24

There is no voltage to the UC3842BN. Capacitors and diodes are functional.
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#3 16459167 06 May 2017 18:44

TONI_2003 TONI_2003

Moderator

» | Helpful post? (+3)

Post #3
16459167 06 May 2017 18:44

mekoy wrote:
Capacitors and diodes are functional
Sure, I'm curious what a miracle you haven't checked, for example R7, R8 is just for the look
#4 17338012 19 Jul 2018 13:14

worys worys

Level 12

» | Helpful post? (+2)

Post #4
17338012 19 Jul 2018 13:14

TONI_2003 wrote:

mekoy wrote:
Capacitors and diodes are functional
Sure, I'm curious what a miracle you haven't checked, for example R7, R8 is just for the look

Because the topic is not closed, let me add that in addition to the above. components must be replaced with UC3842. I had the same case.
And the reason was the dried 82uF / 400V capacitor.
The topic can be closed.
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Hitachi UC18YG Charger Issues: Replaced Burned Resistors and 2SK3567 Transistor, Still Not Charging

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