Sony KDE-50XBR950 / KDE-P50MRX1 / KE-50MR2 / KE-P50MRX1 Service Manual ▷ View online
31
Fuse Resistance(R20)
Fuse Resistance (R12)
R20 OK : About1.0ohm(1/4W)
NG: Open
NG: Open
R2 OK : About2.2ohm(1/4W)
NG : Open
Fuse Resistance (R2)
R12 OK : About1.0phm(1W)
NG : Open
R20
R12
R2
High Voltage PKG
Tester Check 3
32
Data IC
OK: Open
NG: Short
OK: Open
NG: Short
Check between No 1 or No 2 pin and GND.
Check between No 1 or No 2 pin and GND.
(1)
Remove each CN8 of each Data relay PKG (R-T,R-B),
and. Check between No 1, or No. 2 pin and GND of each
connector with tester.
and. Check between No 1, or No. 2 pin and GND of each
connector with tester.
(2)
When short, Since there is a certain possibility data IC
connected to Data relay PKG is failure. Remove the heat
sink on data IC and check whether there are any
abnormalities, such as destructive sign in the surface.
connected to Data relay PKG is failure. Remove the heat
sink on data IC and check whether there are any
abnormalities, such as destructive sign in the surface.
CN8
CN8
Data Relay PKG (R-T,R-B)
No 1 or No 2 pin of each CN8
(
Vd Line of Data IC)
Tester Checking 4
33
PH2301
Parts Location
High Voltage PKG
Tester Check 5
34
Power HIC
PH2301 on the back of High Voltage PKG
Check point
A – C
I – J
P – R
B – F
J – K
Q – R
C – D
K – L
S – T
C – E
M – U
T – U
G – T
N – P
U – V
H – N
O – P
L
F G
H
M
E
D
C
B
A
Judgment
OK : Diode characteristic
NG : Except above
I
K
J
N
O
P
Q
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
(Cautions) D, E, F, G, I, and R are GND.
A
(1)
V
(112)
C
(9-14)
B
(3-7)
E
(21)
G
(32)
H
(44)
I
(52)
J
(57-60)
K
(62-65)
L
(67-70)
M
(72-75)
N
(80-83)
O
(85)
P
(87-90)
Q
(91)
R
(94-97)
S
(99-102)
T
(104)
U
(106-109)
56
D
(16-20)
F
(27-28)
Tester Check 6
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