Using Rs-232C Commands - Pioneer PDP-5050SX Service Manual

1

6.6 USING RS-232C COMMANDS

A
For the PDP-4350SX and PDP-5050SX series Plasma Displays, the circuitry is structured as shown in the diagram below to
support the SR+ system. Controlling with either the SR+ system or RS-232C commands can be selected. As the SR+ system
is selected at shipment, to control with RS-232C commands in servicing it is necessary to switch the paths. After servicing, be
sure to return the setting to the SR+ system.
¶ Rough diagram of switching between SR+ and RS-232C
AV BOARD Assy
B
232C (DSUB_9P)
SR Assy
SR+ (SR out)
¶ How to switch from SR+ to RS-232C
Remote control unit
C
Enter the Service Factory mode
START
INFORMATION
VERSION
D
Tips: How to change the SR+/RS-232C setting without entering Service Factory mode
Hold the VOLUME
Then within 3 seconds after the key is released, hold the SPLIT key on the remote control unit pressed for 3-10 seconds.
Then within 3 seconds after the key is released, use the ENTER key on the remote control unit to set to RS-232C (the baud
rate last selected is chosen) or the HOME MENU key to set to SR+.
E
F
114
1
2
232C
Driver
SR+
Interface
SR+ → 232C / 232C → SR+
Select INITIALIZE mode
MUTING
INITIALIZE
SYNC DET
Select SR+ / 232C
INITIALIZE
UART
SR+ ↔ 232C
or key on the remote control unit pressed for 3-10 seconds during Standby mode.
2
3
TXD (EXT), RXD (EXT)
SR_EN_B
Left Right
PDP-5050SX
3
4
IC8702
(IF Microcomputer)
Select UART
INITIALIZE
UART SELCT
4
Up
Down