Hitachi 46W500 Training page 117

(8) DVD PWB Ass'y Operation Check
b)DVD Control Check
Apply 3.3Vp/p 500Hz square wave to pn 16, 18, 19
and 21 of PPA1 connector.
Is there 3.3V p/p +/-20% 500Hz square wave at
pins 6, 7, 9 and 10 of PVS1 connector?
Apply 3.3Vp/p 500Hz square wave to
pin 4 of PVS1 connector.
Is there 3.3V p/p +/-20% 500Hz square wave at
pin 22 of PAA1 connector?
Apply 3.3V, 0V and open to pin 17 of PAA2
connector sequentially with 1s interval.
Does the voltage vary 3.3V, 0V and 1.7V with 20%
tolerance sequentially at pin 1 of PVS1 connector?
Apply 3.3Vp/p 500Hz square wave to
pin 1 of PAA2 connector.
Is there 3.3V p/p +/-20% 500Hz square wave at
pin 3 of PVS2 connector?
(8) DVD PWB Ass'y Operation Check
c)DVD Audio/Video Check
1
Yes
Yes
Yes
Yes
2
16 = Enable
18 = Data
19 = PWRCON
21 = Clock
No
IU02 defective
Level Shifter
No
IU02 defective
Level Shifter
Open = No Connection
Pin 17 = Aspect
No
Aspect circuit path defect
DU07, RU14, RU15, RU16, DU19
Pin 1 = SPDIF
SPDIF circuit path defect
No
DU11, DU12, RU13, CU43, QU07,
RU76, DU17, DU18, RJ19, LU06
DP-33W
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