Failure Diagnosis Of The Scanning Ic; Failure Diagnosis Of The Common Board (X Drive) - Pioneer PRO-1410HD Field Service And Training Manual

Failure diagnosis of the Scanning IC

Check with a tester the resistance value between any pins indicated as NEGA and POSI of the
connector in the photos below. If a positive and a negative pin of the connector on the Scanning
Relay PKGs are short-circuited and remains short-circuited even after the connectors on the
Scanning PKG and Scanning Relay PKG are disconnected, the Scanning IC on the Scanning Relay
PKG is in failure.
Scanning PKG
NEGA NEGA
POSI POSI
Check points

Failure diagnosis of the Common Board (X Drive)

Glass fuses (F1 and F2) at
the upper-right corner of
the Common PKG
Failure diagnosis of the Power HIC on the Common Board
Scanning Relay PKG
(upper connector)
Between any pins of
NEGA and POSI blocks
OK: Short-
circuited,
NG: Open
D
E
F
G
H
I
PH2311
Scanning PKG
POSI POSI
NEGA NEGA
OK: k Ω or more,
NG: Short-circuited
Fusible resistor (R101) at the
lower-right corner of the Common
PKG: Approx. 2.2 Ω (1 W)
(58~62)
(53~56)
(47~51)
PH2311
(rear view)
(42~45)
(37~40)
(32~35)
Check points
Between A and B
Between B and H
Between C and I
Between D and E
Between F and G
Note: A and D are ground.
27
Scanning Relay PKG
(lower connector)
OK: Short-
circuited,
NG: Open
1
9
11
A
(13~16)
20
B
(23~26)
C
(28~31)
Result:
OK: k Ω or more,
NG: Short-circuited