PIONEER VSX74TXVIS
Manual de Servicio

1

2

3

4

Step 3: HDMI
A

Step 3-2: CLK, DATA

Step 3-3: Tx

U
IC101 (pins 1-3, 121) VIDEO No Check the soldering of IC101. If soldering has not been done correctly, replace IC101.

W
D381 (Cathode) HPD No Check the soldering of D381. If soldering has not been done correctly, replace D381.

Is there a clock ?

Is the voltage "H" (5 V)?

U
B

Yes

X

Yes DDC_TX No Check the soldering of IC301. If soldering has not been done correctly, replace IC301.

IC101 (pins D0-D23) No Check the soldering of IC101. If soldering has not been done correctly, replace IC101.

IC301 (pins 19, 20)

Is there a data ?

Is there a signal ?

U

Yes AUDIO (DVD) No Check the soldering of IC101. If soldering has not been done correctly, replace IC101.

Y

Yes

IC101 (pins 78, 88) Are there clock and data?
C

Q353 (pins 3, 6) Are signals the No Check the soldering of Q353. same as those at Pins 4 and 1 but whose voltage If soldering has not been done has been converted correctly, replace Q353. from 3V to 5V detected? Yes Yes

V

Yes IC201 (pin 11)

Z
Is there a data ? Yes Check the INTERFACE Assy and DIGITAL MOTHER Assy.
D

No

Check the soldering of IC201. If soldering has not been done correctly, replace IC201.

IC301 (pins 26, 27, 29, 30, 32, 33, 35, 36) TMDS_TX

Do signals (approx. 0.5 Vp-p) run in all the lines? Yes

No Check the soldering of IC301. If soldering has not been done correctly, replace IC301.

U
IC101 (pins 81-88) Are there clock and data? Yes AUDIO (DVD-AUDIO/Multi ch)

CN301

Is soldering of No Check the soldering of IC101. If soldering has not been done correctly, replace IC101. CN301 OK? Yes Replace CN301

No

Solder the CN301correctly.

V
E

IC201 (pins 12-18) Are there clock and data? Yes Check the INTERFACE Assy and DIGITAL MOTHER Assy. No Check the soldering of IC201. If soldering has not been done correctly, replace IC201.

F

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VSX-74TXVi
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