Pioneer PDP-4270XA Service Manual page 69

5
Pin Function
42E AUDIO Assy MAIN Assy
CN3752 (A2) CN4007 (M9)
Pin No. Pin Name
1 A_NG_B
2 GND
3 AUDIO_L
4 GND
5 AUDIO_R
6 GND
7 A_STBY_B
8 A_MUTE
9 SCL_AU
10 SDA_AU
11 PSW_A
42E AUDIO Assy POWER SUPPLY Unit
CN3751 (A1) (P5)
Pin No. Pin Name
1 +16.5V
2 GND_D
3 GND_D
42E AUDIO Assy
Speaker
CN3753 (A3)
Pin No. Pin Name
1 RH+
2 RL+
3 RH–
4 RL–
5 LL+
6 LH+
7 LL–
8 LH–
SIDE KEY Assy MAIN Assy
CN9501 (SW1) CN4010 (M8)
Pin No. Pin Name
1 GND
2 KEY_AD2
3 KEY_AD1
4 V+3.3V_STB
42 & 60 LED Assy MAIN Assy
CN9601 (L1) CN4006 (M5)
Pin No. Pin Name
1 LED–
2 LED_ON
3 LED_OFF
4 LED_REC
5 LED_MDM
6 LED–
LED IR Assy MAIN Assy
CN9701 (RE1) CN4010 (M8)
Pin No. Pin Name
1 V+5.1V_STB
2 REM
3 LED–
4 LED_REC
5 LED_MDM
6 GND
5
6
I/O
O DC detection, disconnection of cable detection
– GND for small signal
I Small signal L ch
– GND for small signal
I Small signal R ch
– GND for small signal
I MUTE ON/OFF signal for LA4625 IC internal circuit
I MUTE ON/OFF signal for LA4625 IC external circuit
I CLK of I2C for NJW1183GK1 IC
I/O DATA of I2C for NJW1183GK1 IC
I ON/OFF switch for 12 V regulator IC
I/O
– Power supply (16.5 V) for LA4625 IC
– Return GND for LA4625 IC
– Return GND for LA4625 IC
I/O
O Toweeter output R+
O Woofer output R+ (Speaker output R+)
O Toweeter output R–
O Woofer output R– (Speaker output R–)
O Woofer output L+ (Speaker output L+)
O Toweeter output L+
O Woofer output L– (Speaker output L–)
O Toweeter output L–
I/O
– GND
O KEY voltage 2
O KEY voltage 1
– Standby 3.3 V power supply
I/O
– LED signal return
I LED control for power ON
I LED control for standby
I LED control for REC
I –
– LED signal return
I/O
– Standby 5.1 V power supply
O Remote control signal
– LED signal return
I LED control for REC
I –
– GND
PDP-427XD
6
7
Function
Function
Function
Function
Function
Function
7
8
Remarks
L : Abnormal, H : Normal
–
–
–
–
–
L : Standby, H : ON
L : MUTE OFF, H : MUTE
–
–
L : OFF, H : ON
Remarks
–
–
–
Remarks
–
–
–
–
–
–
–
–
Remarks
–
–
–
–
Remarks
–
H : LED_ON, L : LED_OFF
H : LED_ON, L : LED_OFF
H : LED_ON, L : LED_OFF
–
–
Remarks
–
–
–
H : LED_ON, L : LED_OFF
–
–
69
8
A
B
C
D
E
F