Switch Unit Buttons - Sony KLV-28R412B Service Manual

3-12. Switch Unit Buttons

Switch Unit NOT FUNCTIONING
Check Wire Harness
And Connector
Connectivity?
OK
Check 3.3V
in Pin2, CN1
(Switch Unit)
OK
*Check
Pin 1 Voltage Level
in CN1
OK
Change B-board
NG
Change Wire Harness
And connect properly
NG
Check 3.3V in Pin 7,
CN9900 on
B-board
OK
NG
Change Switch Unit
NG
R410/412/413/420/422/423/424/425/426/427/428/430/433/435/
450/453/455/470/472/473/475/477/478/480/483/485/M5/M10B
*VOLTAGE LEVEL FOR EACH PRESSED BUTTON
KEY Voltage Voltage range
(average)
-
0.000
0.00000 – 0.82353
+
1.114
0.83451 – 1.37255
CH/Input
1.693 1.383529 – 2.03137
No Input
2.420
2.04235 – 2.80000
B*Board Type:
Size
28"
32"
40"
48"
ITC3
CHASSIS
B* Board Type
PAN ASIA, CHINA EUROPE, AMERICA
BIS -
BIS BIL
BIS BIL
BIS BIL
51