*Q1243
1
2
34
5
6
*Q1242
1
2
34
5
6
*Q1241
1
2
3 4
5
6
*R1246
C1248
100p/50
R1247
22k
R1248
22k
C1247
100p/50
C1250
100p/50
R1249
22k
R1250
22k
C1249
100p/50
R1252
22k
C1251
100p/50
C1252
100p/50
R1251
22k
GND
GND
*R1243
*R1244
*R1241
*R1242
C1254
0.1u/10
C1253
0.01u/16
*R1245
P1243
FSMD075
12
JA1241
CKB1113
1
2
3
4
5
6
7
8
R1256
NM
R1254
NM
R1255
0
R1253
0
L1292
VTL1126-A
L1293
VTL1126-A
L1294
VTL1126-A
L1296
VTL1126-A
L1297
VTL1126-A
L1295
VTL1126-A
R1284
0
1608
L1298
GND
3P/O
RL
SWR
GND
RR
GND
FL
FR
SWL
2P/O
3P/O
3P/O
A
NM
PREOUT
- No sounds and display output of external unit (the condition when the fuse is blown (poly switch is working))
This product may receive excessive current if the power line connection of the external product is incorrect, such as Ground
connection failure.
The poly switch P1243 on TUNER AMP UNIT is used to protect this product from this excessive current.
Even though poly switch is working to cut the circuit, the sounds of Pre-out output and AUX input are output properly and also
other functions work correctly.
However, you cannot turn on the external product connected to this product as the power is not supplied if the poly switch is
working to cut the circuit.
(The symptom in this case is the sounds of external product are not output on this product when the external product is
connected on a vehicle.)
If you find the symptoms above, check whether or not the poly switch is working to cut the circuit.
If there is any problem (you cannot turn on the power of external unit), check the power connection (Ground) of external unit.
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