Pioneer PDP-614MX Service Manual page 23

2. Points of failure diagnosis for a Board Assy (PKG)
The fuses and/or fusible resistors shown in the photos below may be blown by electric
surges caused by a failure. In such a case, replace the corresponding PKG.
Failure diagnosis of the Scanning PKG
Fusible resistor (R12) located
at the upper-left corner of the
Scanning PKG: Approx. 1.0 Ω
(1/2 W)
Fusible resistor (R29) located
at the upper-left corner of the
Scanning PKG: Approx. 4.7 Ω
(1/4 W)
Fusible resistor (R108A)
located at the lower-right corner
of the Scanning PKG: Approx.
2.2 Ω (1 W)
Fusible resistor (R113) located
at the lower-right corner of the
Scanning PKG: Aapprox. 4.7 Ω
(2 W)
Failure diagnosis of the Power HIC on the Scanning PKG
PH2311
PH2312
Glass fuses (F1 and F2)
located at the upper-left
corner of the Scanning
PKG
OK: Short-
circuited,
NG: Open
Fusible resistor (R111) located
at right center of the Scanning
PKG: Approx. 10 Ω (1 W)
OK: Short-
circuited,
NG: Open
D
(58~62)
E
(53~56)
F
(47~51)
PH2311(rear view)
G
(42~45)
H
(37~40)
I
(32~35)
Note: A, D, and E are ground.
A
(59~62)
B
(54~57)
52
49
C
PH2312(rear view)
(46)
D
E (43)
(42)
F
(40)
G
(38)
H
(35)
I
(34)
J
(32)
Note: C and G are ground.
7-2
OK: Short-
circuited,
NG: Open
OK: Short-
circuited,
NG: Open
1
Check points
9
Between A and B
11
13 Between B and H
A
(14~15)
Between C and I
20
Between D and E
B
Between F and G
(23~26)
C
(28~31)
Result:
OK: k Ω or more,
NG: Short-circuited
Check points
1
Between A and B
Between C and D
8
Between E and F
11
Between G and H
Between I and J
Result:
27
OK: k Ω or more,
30
31 NG: Short-circuited