Daewoo 14q2 ユーザーズマニュアル

40

CHECK MAIN B+(+123V/+110V) LINE

NORMAL

NORMAL

NORMAL

ABNORMAL

ABNORMAL

ABNORMAL

ABNORMAL

ABNORMAL

ABNORMAL

ABNORMAL

ABNORMAL

NORMAL

NORMAL

NORMAL

NORMAL

CHECK / REPLACE I701

CHECK / REPLACE

I802(TDA8138)

I803(KA7808)

CHECK / REPLACE

D813     (BYV95C)
D814     (BYV95C)

R824         (2W 43)

Q802 (KTC 3198Y)
Q803 (KTC 3198Y)
T801 (TSM-4245A)

CHECK VOLTAGE AT 

(+) OF C807(220

µ

F 400V)

310Vdc AT AC 220V

CHECK / REPLACE F801

FUSE(T4A 250V)

CHECK / REPLACE 

D801~D804(1S1888X4)

R803(10W 3.3OHM)

CHECK / REPLACE 

I801(STR-S5707)

& PERIPHERAL

COMPONENT

CHECK /REPLACE 

I804(PC817)

D812(BYW 95C)

R814(2W 56K)

CHECK POWER SWITCHING
VOLTAGE AT PIN 43 OF I701

*POWER ON; HIGH

*STAND-BY ; LOW

CHECK VOLTAGE(+5V DC)

AT PIN 11 & PIN 37 OF I701

CHECK SDA(PIN 3) 

& SCL(PIN4)

WAVEFORM OF I701

CHECK / REPLACE 

X701(20MHz, 18MHz)

CHECK / REPLACE 

R410(1/4W 3.9)

1401 (2SD1207)

T401 (TD-10A2)

Q402 (2SD2499)

CHECK / REPLACE 

T402 F.B.T

& CRT

OK

OK

CHECK HEATER VOLTAGE, 

VIDEO B+(200V) LINE,

16.5V & 48V LINE

CHECK HORIZONTAL

DRIVE PULSE AT PIN 40

OF I501(TDA8374A)

[REFER TO WAVE 

FORM 

]

CHECK HORIZONTAL

Vcc(+8V DC) AT 

PIN  37 OF I501

CHECK SDA(PIN 8)

& SCL(PIN7)

WAVEFORM OF I501

CHECK / REPLACE

I501(TDA8374A)