Side Buttons Malfunction - Sony KDL-42W800A Service Manual

Troubleshooting

3-7. SIDE BUTTONS MALFUNCTION

HUS button
malfunction malfunction
Change HUS
NG?
■ Execute SIDE BUTTONS
i.Start Side Key check with diag sidekey_check.
ii.Push Side Key : CH+
when [MESSAGE] PLEASE PUSH [ CH+ ] KEY is displayed.
iii.Push Side Key : CH- iii P h Sid K CH
when [MESSAGE] PLEASE PUSH [ CH- ] KEY is displayed.
iv.Check that diag sidekey_check result OK is returned.
 When this check result is NG.
Check Harness on HUS and
B* Board properly connected
NG
Loose harness 
connect properly
↓
Check Harness pin Assignment
According to circuit.
OK
NG
Change Harness
B* Board Type
Size
OTHERS JAPAN
42 BA2S
47 BA2S
55 BA2S
W800A/W801A/W802A/W804A/W805A/W806A/W807A/W808A/W809A
Probe at Key_AD line and y_
check the signal
OK
Change B* Board
G* Board Type
CHINA ASIA AMERICA EUROPE JAPAN
BA2W GL2S GL2S GL2E(CH) GL2E(ID)
BA2W GL2S GL2S GL2E(CH) GL2E(ID)
BA2W GL2E(CH) GL2E(ID) GL2E(CH) GL2E(ID) GL2E(ID)
RB1G CHASSIS
OK
GL2S
GL2S
202