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blink
Joined: 28 Oct 2017
Posts: 3
Location: Nigeria
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 Posted: Sat Oct 28, 2017 3:11 pm Post subject: Samsung LA32D450 - no picture but sound ok |
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Samsung 32inch lcd tv
model LA32D450
I have this Samsung tv with display problem, the soun is fine and I can see the pictures with touch light rays from the back it seems the back light is faulty . I try to check voltages from power board to inverter board the two voltage high and low is present I could not measure any voltage after the transformer and I don't know how to read the transformer ,
who can help me out |
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JTS1957
Joined: 21 Jan 2009
Posts: 2394
Location: Far, Far Away
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| Posted: Sat Oct 28, 2017 7:51 pm Post subject: |
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| Power, Inverter & Main board part numbers? |
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blink
Joined: 28 Oct 2017
Posts: 3
Location: Nigeria
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| Posted: Wed Nov 01, 2017 11:49 pm Post subject: samsung lcd 32 tv no picture sound ok |
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| JTS1957 wrote: | | Power, Inverter & Main board part numbers? |
samsoung 32" lcd tv faulty baCK LIGHT
MODEL LA32D450
INVERTER BOARD CM32T-BHS
MAIN BOARD BN44_00438E
FROM MAIN BOARD WHAT SHOULD BE THE VOLTAGE TO THE TWO INVERTER TRANSFORMER |
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JTS1957
Joined: 21 Jan 2009
Posts: 2394
Location: Far, Far Away
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| Posted: Thu Nov 02, 2017 12:39 am Post subject: Re: samsung tv no pic but sound ok |
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| blink wrote: | samsoung 32" lcd tv faulty baCK LIGHT
MODEL LA32D450
INVERTER BOARD CM32T-BHS
MAIN BOARD BN44_00438E |
POWER SUPPLY http://www.shopjimmy.com/samsung-bn44-00438a-power-supply-unit.htm
Between CN1801 & AC Input is CN1801 Pinout. Voltage legend is further in board from CN1801.
The actual MAIN BOARD would be the board with Inputs and Tuner.
| blink wrote: | | FROM MAIN BOARD WHAT SHOULD BE THE VOLTAGE TO THE TWO INVERTER TRANSFORMER |
(Transformer OUTPUT may be too large to safely measure) (Comparative resistance readings should tell if likely good or bad). |
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blink
Joined: 28 Oct 2017
Posts: 3
Location: Nigeria
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| Posted: Mon Nov 13, 2017 6:27 am Post subject: Re: samsung tv no pic but sound ok |
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| JTS1957 wrote: | | blink wrote: | samsoung 32" lcd tv faulty baCK LIGHT
MODEL LA32D450
INVERTER BOARD CM32T-BHS
MAIN BOARD BN44_00438E |
POWER SUPPLY http://www.shopjimmy.com/samsung-bn44-00438a-power-supply-unit.htm
Between CN1801 & AC Input is CN1801 Pinout. Voltage legend is further in board from CN1801.
The actual MAIN BOARD would be the board with Inputs and Tuner.
| blink wrote: | | FROM MAIN BOARD WHAT SHOULD BE THE VOLTAGE TO THE TWO INVERTER TRANSFORMER |
(Transformer OUTPUT may be too large to safely measure) (Comparative resistance readings should tell if likely good or bad). |
new inverter board was replaced ,still not working two transistor 5n52u bad it was also replaced now I have 32v on pin 1 high to gnd why pin 3 low has 18v to gnd but between pin 1 and 3 no output but there is voltage before c1826 capacitor = 424j 400v but no voltage after this capacitor c1826.
what else am I getting wrong kindly help me out. |
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