Pdp No Sound - Vizio VP50HDTV10A Service Manual

PDP N
O SOUND

PDP NO SOUND

Start
Audio power DC power ok?
Check audio AMP U19 has output?
U32 has output signal?
Check U32 input
CONFIDENTIAL – DO NOT COPY
No
Check F2 output has +24V?
Yes
No
Check U19.8 and U19.9
input siganl?
Check Audio AMP U19
has output?
speaker fail
No
Appstest 90 1 0x14 0x3540
(Gprobe 5.0)
Is there 1KHz output?
Check U27,U28 output
No
R326,R328 Digital HD2,AV1
R372~R379 R332,R334 Digital HD1,AV2
R348,R351 Analog HD1,VGA
R356,R358 Analog HD2
No
Audio power fail
No
Check C436,C430
Yes
No
Block 3
Yes
No
U32 Fail
Check U27,U28
No
+5V power
Pin 8,24,4
-5V power
Pin 25
Check U27,U28 I2C bus
U27 SDA=R344,SCL=R345
U28 SDA=R359,SCL=R360
Check Q35 MSTR2_SCL
Q37 MSTR2_SDA
Is there signal?
No
Check U29's power
+5V_SW Pin 8
Yes
Yes
Check U29 output
-5V_N pin 5
No
No
U29 fail
No Yes
Check U13
No
U13 fail
Q35,Q37 fail
Page 9-21
File No. SG-0219