PN-2955H-A
- 9 -
TROUBLESHOOTING
B/U 5V line(IC505)
ACC DET line(Q513)
Power does not turn on
B/U,ACC
Power Supply
1
CHECK ITEM
CHECK POINT
B/U DET line(IC506)
RESET IC(IC404)
System
Reset
2
X401:10MHz
Microcomputer
Clock
3
SYS-ON signal of IC402 (pin 9)
SYS 5V line(Q508)
System
Power Supply
4
Output wave form of pins 17(M-CAN RX) and
18(M-CAN TX) of IC 402
IC403
Display line
5
M-CAN
Trancever
6
TUN 9V(Q105)
TUN 5V(IC101)
Radio does not work
CD player does not work
Tuner
Power Supply
1
CHECK ITEM
CHECK POINT
Pins 5-11 of BL101
DSP Line
2
Pins 13,14,28 and 29 of BL101
Output
of Tuner
3
Parameter adjustment
(with special jig)
Parameter
of DSP
4
Pins 38,39,43 and 44 of IC301
Output
Wave Form
5
Pins 11,12,14 and 15 of IC504
Input of
power IC
6
Power-IC IC504
Output of
power IC
7
Around power IC(IC504)
8
Pins 11,12,14 and 15 of IC504
Input of
power IC
Power-IC IC504
Output of
power IC
Around power IC(IC504)
Pins 33 and 34 of IC301
CD mechanism
line
2
CHECK ITEM
CHECK POINT
Pin 8 of J201
CD-SPDIF
Output
3
CD 9V line(IC202)
CD 3.3V line(IC201)
CD mechanism
Power Spply
1
Pins 38,39,43 and 44 of IC301
Output
wave form
of DSP
4
5
6
7
(9) Audio ON mode
Power off
Turn on power while pushing the "2" key and "4" key
at the same time.
(6) Fail safe mode
Acc on
Fail safe mode (Key lock)
When a key is pressed for two minutes or more,
it becomes the key lock.
* The key lock is recorded (4-2 Key error record mode)
* The steering wheel remote control key also
(7) Changer mode
Changer mode
* Mode release: Acc-off
Power off
Audio ON mode
* Audio operates normally even if the indicator is removed.
* Mode release: Acc-off
Power on
Push the AUDIO key for ten seconds.
(8) Loud flat mode
Loud flat mode
* Mode release: Acc-off
Click the VOL key 30 times right and left while pressing
"3" key.
