Yamaha TF5 Service Manual page 142

TF5/TF3/TF1
7-2-6. ETHER
[Contents]
Inspect the connection between Ether circuit and
CPU(IC905).
[Procedure]
<GUI>
Connection of ETHER established?
FAIL
Since popup dialog as shown in the above fi gure is displayed
on the screen, check whether connection of Ether is
established and select [FAIL] or [PASS].
<Display of inspection log>
In the case of PASS, "PASS : ETHER".
In the case of FAIL, "FAIL : ETHER".
7-2-7. BATT
[Contents]
The voltage of a backup battery is inspected.
[Procedure]
Insert a battery in the socket in advance.
In the power up of the fi rst time after battery insertion, it
cannot inspect correctly.
That inspection is performed after turning on the power
of two or more times. Moreover, inspect by carrying out a
power supply reclosing after the time more than 10 seconds
after turning off fi rst-time.
<GUI>
Automatic judgment
<Display of inspection log>
In the case of PASS, "PASS : BATT".
In the case of FAIL, "FAIL : BATT".
142
PASS
7-3. CPLD
When you conduct the following inspections after these
CPLD inspections, by the time it executes the following
examination command from the completion of an inspection,
please vacate the interval of 7 seconds or more.
7-3-1. CPLD_CONNECT
[Contents]
Inspect the I2C bus connection between CPU (IC905) and
CPLD (IC802) by reading CPLD version number from CPU.
[Procedure]
<GUI>
Automatic judgment
<Display of inspection log>
In the case of PASS, "PASS: CPLD_CONNECT".
In the case of FAIL, "FAIL: CPLD_CONNECT".
7-3-2. CPLD_CLK
[Contents]
The inspection of the internal clocks is judged by reading of
FS count register of CPLD.
[Procedure]
<GUI>
Automatic judgment
<Display of inspection log>
In the case of PASS, "PASS: CPLD_CLK".
In the case of FAIL, the contents of failure are returned like
"FAIL: ICK45 ICK49".
ICK45 The clock connected to ICK45 (58
(IC802)
ICK49 The clock connected to ICK49 (55
(IC802)
th ) port of CPLD
th ) port of CPLD