Service manual

3) IPL from P-ROM via ER-A7RS
(1) Install the two master ROMs to the IC socket (IC12 , IC13) on the
ER-A7RS.
Master ROM -1 : VHI27801RAJxx
Master ROM -2 : VHI27801RAKxx
(2) Remove AC power from the ER-A770.
(3) Set the IPL switch of the ER-A7RS : Set the IPL SW to ON position.
(4) Install the ER-A7RS to the ER-A770. (The ER-A770 power should
be turned OFF.)
(5) Turned on the power of the ER-A770.
(6) The buzzer sounds intermittently during the running of IPL and the
program finishes after the buzzer gives five beeps at short inter-
vals.
(7) Turn OFF the power of the ER-A770.
(8) Remove the ER-A7RS from the ER-A770.
(9) Perform the Master reset.
3. ER-A770 Utility tools
1. Outline
This Specification document describes the explanation about "POSU-
TILITYTOOL.EXE and "02FD.EXE".
"POSUTILITYTOOL.EXE" and "02FD.EXE" works with Windows95/98
operating systems and have the following functions by connecting
ER-A770 via RS232.
POSUTILITYTOOL.EXE : IPL of ER-A770 Program Object
02FD.EXE : All RAM Data Upload/Download
(PC software tool instead of the current
ER-02FD.)
2. Environment
PC and ER-A770 are connected by RS232.
Connect the CH2 port of the ER-A770 to the RS-232 interface of the
PC.
RS232 Cable Connecting:
3. Procedure
3.1 POS UTILITY TOOL
NOTE : The screen layouts for the PC-based POS utilities may change without notice for improrement.
No Procedure on P.C. side No Procedure on ER-A770 side
1 Install "POSUTILITYTOOL.EXE" on the P.C.
2 Turn OFF the power.
3 Select "IPL Mode".
Set "IPL Switch" of ER-A770 to "ON".
4 Turn ON the power.
5 Starting of "IPL Mode".
ER-A770 shows
"IPL from Serial I/O"
6 Connect P.C. and ER-A770 (CH2) via RS232. (Fig 1)
IPL SW
OFF
ON
IC13 ROM2
IC12 ROM1
MASTER
P-ROM -2
MASTER
P-ROM -1
RS-232
PC
POS
CH2
Fig. 1 Connection between PC and ER-A770
[PC]
3 TXD 3 TXD
2 RXD 2 RXD
5 S.G. 5 S.G.
[ER-A770]
IPL SW
OFF
ON
IPL from Serial I/O
>>>>> USE FONT <<<<<
Helvetica/ Helvetica-Condensed/ Century-Schoolbook/ Symbol & OriginalFonts: (RingWorld2/RingFont2/Pa
Symbol/PartsCod)
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