I2C communication wave form
CH1: CLK
CH1: DATA
VIDEO PCB faulty.
B
Extend the DIGITAL PCB using the jig.
Check power supply voltage and I2C control signal of
video selector IC. (IC511)
V+3.3V
: J5043
V-5V
: J5042
I2C(SCL)
: J5046
I2C(SDA)
: J5047
(VIDEO PCB)
Power supply IC (IC513) flaw.
SIDE CNT PCB(BN28B) flaw.
Video selector IC (IC511) faulty.
The circuit between IC511 are faulty.
Defective the soldering IC (IC511) or IC (IC511) flaw.
Check the signal input to video selector IC. (IC511)
V
: C5107
OMPONENT-Y
: J5010
COMPONENT-Cb : J5007
COMPONENT-Cr
: J5006
(VIDEO PCB)
Check the signal output from video selector IC. (IC511)
(VIDEO PCB) to MONITOR to DIGITAL PCB
V
: J5019 BN21B-17pin
OMPONENT-Y
: J5021 BN21B-15pin
COMPONENT-Cb : J5028 BN21B-13pin
COMPONENT-Cr
: J5029 BN21B-11pin
MONITOR OUT
Output terminal (JK511 or JK513) or pattern flaw.
HDMI OUT
Defective connection of FRONT CNT PCB (BN21B) or
FRONT CNT PCB pattern flaw.
NO
NO
NO
YES
YES
YES
YES
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