Pioneer PDP-505PU Service Manual page 29

5
• Voltages
CN4001 (R1) < ⇔ POWER SUPPLY UNIT >
No. Signal Name I/O
1 6.5V I +6.5V power supply
2 6.5V I +6.5V power supply
−
3 Vcc_GND GND
−
4 Vcc_GND GND
5 STB3.3V I Power supply +3.3V input of module UCOM at panel side
−
6 STB_GND GND
7 STB3.3MUTE O Standby control (+3.3V mute)
8 AC_DET I Primary power supply (AC) state input at panel side
CN4002 (R2) < ⇔ MEDIA RECEIVER >
No. Signal Name I/O
1 MR_ST_B I
Connection state detecting signal with MR
UART communication transmission data with the main UCOM (external PC)
2 MRXD O
at MR side
3 P_ST_B O
Connection state output for the MR
4 ACT3V O Power supply +3.3V output of module UCOM at panel side
5 AC_OFF O Primary power supply (AC) state output at panel side
−
6 GND GND
7 REQ O
Communication request to the main UCOM (external PC) at the MR
8 STB3V I
Standby power supply (+3.3V) input from the MR
9 KEY_B O Function key code signal output at panel side
10 MR_ST_B' I Connection state detecting signal with the MR
UART communication receive data with the main UCOM (external PC) at
11 MTXD I
the MR side
−
12 GND
GND
13 AUDIO_R I R ch audio signal input
14 REM_B O Remote control code signal output
15 STB_MT I Standby control input
−
16 GND GND
−
17 NC Not connected
18 FIELD I
FIELD control signal
−
19 GND GND
20 AUDIO_L I L ch audio signal input
CN4003 (R3) < ⇔ MEDIA RECEIVER >
No. Signal Name I/O
1 RX2- I DVI signal
2 RX2+ I DVI signal
−
3 GND GND
−
4 N.C
Not connected
−
5 N.C Not connected
6 DDC_SCL I I2C signal for DDC
7 DDC_SDA I I2C signal for DDC
−
8 N.C
Not connected
9 RX1- I DVI signal
10 RX1+ I DVI signal
−
11 GND GND
−
12 N.C Not connected
−
13 N.C
Not connected
14 DDC_+5V I I2C power supply for DDC
−
15 GND GND
16 HPD O Hot plug detection
17 RX0- I DVI signal
18 RX0+ I
DVI signal
−
19 GND GND
−
20 N.C
Not connected
−
21 N.C Not connected
5
6
Signal Description
Signal Description
Signal Description
PDP-505PE
6
7
Voltages at NTSC Signal Input
+6.8VDC
+6.8VDC
+3.3VDC
+3.3 VDC
+3.0VDC
Voltages at NTSC Signal Input
0VDC
0-3.3V amplitude square wave
0VDC
+3.3VDC
0VDC
0-3.3V amplitude square wave
+3.3VDC
0-3.3V amplitude square wave (at key
operation)
0VDC
0-3.3V amplitude square wave
Audio R signal
0-3.3V amplitude square wave (at remocon
code transmission)
0VDC
−
0VDC
Audio L signal
Voltages at NTSC Signal Input
DVI differential signal (-)
DVI differential signal (+)
−
−
0-5V amplitude square wave
0-5V amplitude square wave
−
DVI differential signal (-)
DVI differential signal (+)
−
−
+5VDC
+5VDC
DVI differential signal (-)
DVI differential signal (+)
−
−
7
8
A
B
C
D
E
F
27
8