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Thursday, July 16, 2020

DT 830D Digital Multimeter Fault Finding Pcb Component

DT 830D DIGITAL MULTIMETER CIRCUIT BOARD ALL COMPONENTS
dt830d digital multimeter circuit diagram

Fault 1 = If u connect probe each other in continuity mode buzzer sound on but when you release probe buzzer sound not off up to 30 - 40 second
 Ans - R 16 = 132 = 1300 ohms = 1.3K ohems
Fault 2 = When measure voltages without connecting say some voltages, If short probes then read zero
Ans = R5 1000 = 100 Ohms
Fault 3 =  On continuity  mode without connecting prove buzzer on, Voltage Measure mode read      negetive - voltage
Ans - R7 - 105 = 1M Ohms
Fault 4 = Values increase in Ohems mode and Voltages Mode -
Ans = R6 = 9000 = 900 Ohems
Fault 5= Ac Voltage not Measure
Ans - D1 - M7
Fault 6 = Ac voltage measure but not accurate
Ans = R1 = R2  = 514                R3 = 224
Fault 7 = On  Every mode values increase and decrease
Ans = R4 =224 = 220k Ohems




Front Image dt 830d image

DT 830D Digital Multimeter BACK SIDE

DT 830D Digital Multimeter  R17 R18 IMAGE
R17 = 9R00
R18 = R990

DT 830D Digital Multimeter R22 R23 IMAGE
R22 = 224
R23 = 224

DT 830D Digital Multimeter R15 R16 R19 R20 R21 D1 IMAGE  
R15 = 1006
R16 = 132
R19 = 9002
R20 = 3523
R21 =5483
D1 = M7

DT 830D Digital Multimeter R14 R13 R12 C5 IMAGE
C5 =
R12 = 2002
R13 = 101
R14 = 1003

DT 830D Digital Multimeter R7 R5 R6 R1 IMAGE
R1 = 514
R5 = 1000
R6 =
R7 = 105
C3 =

DT 830D Digital Multimeter R2 R3 R4 IMAGE
R2 = 514
R3 = 224
R4 = 224
DT 830D Digital Multimeter  R8 R9 R10 C4 R11 IMAGE
R8 = 1302
R9 = 3900
R10 = 1003
R11 = 1001
C4 =

DT 830D Digital Multimeter Back side pcb image

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3 comments:

  1. UnknownMarch 22, 2021 at 4:25 AM

    R6=9000

    ReplyDelete
  2. UnknownSeptember 10, 2021 at 7:05 PM

    thanks a lot

    ReplyDelete
  3. TOLDecember 4, 2022 at 9:37 PM

    Thank you for your work for the public good.
    I will add information on the capacitors that I soldered and measured.
    C1 = 0.1µF
    C3 = 0.1µF
    C4=100pF
    C5 = 0.1µF

    ReplyDelete

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