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Samsung LA32D450 - no picture but sound ok    
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blink



Joined: 28 Oct 2017
Posts: 3
Location: Nigeria

PostPosted: Sat Oct 28, 2017 3:11 pm    Post subject: Samsung LA32D450 - no picture but sound ok Reply with quote

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: 2347
Location: Far, Far Away

PostPosted: Sat Oct 28, 2017 7:51 pm    Post subject: Reply with quote

Power, Inverter & Main board part numbers?
blink



Joined: 28 Oct 2017
Posts: 3
Location: Nigeria

PostPosted: Wed Nov 01, 2017 11:49 pm    Post subject: samsung lcd 32 tv no picture sound ok Reply with quote

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
JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Thu Nov 02, 2017 12:39 am    Post subject: Re: samsung tv no pic but sound ok Reply with quote

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).
blink



Joined: 28 Oct 2017
Posts: 3
Location: Nigeria

PostPosted: Mon Nov 13, 2017 6:27 am    Post subject: Re: samsung tv no pic but sound ok Reply with quote

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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