Pioneer PRA-BD11, Service Manual

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PRA-BD11
55
5 6 7 8
5 6
7
8
C
D
F
A
B
E
You can check operations of the PRA-BD12 in detail by connecting an RS-232C jig to the PRV-LX1 with the PRA-BD12
mounted.
2-1. Connection between the PRA-BD12 and an RS-232C jig
Remove the bonnet of the PRV-LX1 on which the PRA-BD12 has been mounted, and connect an RS-232C jig
(GGF1348) and the PRA-BD12 as shown in the figure below.
Using the VDA1681 cable, connect between CN8610 (DOOB) and the GGF1348 RS-232C jig (DVD interface jig for
servicing).
2-2. RS-232C signals
From the PRA-BD12, only TxD RS-232C signals are output continuously:
Bits/sec (baud rate) : 57600
Data bit
: 8
Parity : None
Stop bit : 1
Flow control : None
2-3. Output data indications
The data on the version of the firmware, status of the FFC cable to be connected with AVIB, and operational status of
each IC are displayed, as shown below, after the power is turned on:
From the first to the fourth line, the indications are fixed, except for the firmware (Xilinx) version indication.
The data on the fifth line change in real time, according to actual statuses.
An asterisk (*) is displayed at the left of each figure on the fifth line if the operation of the corresponding
device is not normal.
In such a case, the corresponding LED(s) for checking operations flash(es) twice in succession.
2. Diagnosis using an RS-232C jig
PRA-BD12
DOOB ST.Mon
Xilinx
Ver 1.00
Format AVIB I/F AK4103 GS9023 GS7032
NTSC 316 210 * 470 001
CN8610
RS232C
PC
VDA1681
RS-232C jig
(GGF1348)