Error Handling; Command Mode Interface; Host Decoder Tests [01] - Marantz SA12 Service Manual

5.3.2

ERROR HANDLING

Each nucleus returns an error code. This code contains six
numerals, which means:
[ XX YY ZZ ]
Figure 5-7
The nucleus group numbers and nucleus numbers are the
same as above.
5.3.3

COMMAND MODE INTERFACE

Set-up physical interface components
Hardware required:
• Service PC
• one free COM port on the Service PC
• special cable to connect DVD player to Service PC
The service PC must have a terminal emulation program
(e.g. OS2 WarpTerminal or Procomm) installed and must
have a free COM port (e.g. COM1). Activate the terminal
emulation program and check that the port settings for the
free COM port are: 19200 bps, 8 data bits, no parity, 1 stop
bit and no flow control. The free COM port must be connected
via a special cable to the RS232 port of the DVD player. This
special cable will also connect the test pin, which is available
on the connector, to ground (i.e. activate test pin).
Code number of PC interface cable: 3122 785 90017
Activation
Switch the player on and the following text will appear on the
screen of the terminal (program):
Figure 5-8
The first line indicates that the Diagnostic software has been
activated and contains the version number. The next lines
are the successful result of the SDRAM interconnection test
and the basic SDRAM test. The last line allows the user to
choose between the three possible interface forms. If
pressing C has made a choice for Command Interface, the
prompt ("DD>") will appear. The diagnostic software is now
ready to receive commands. The commands that can be
given are the numbers of the nuclei.
Command overview
The tables below give an overview of the commands.
Startup
[xx yy] Nuclei
Number
startup Test the UART of the host decoder by sending a
string to the UART.
Error code
Nucleus number
Nucleus group number
CL 06532152_013.eps
CL 06532152_014.eps

Host Decoder Tests [01]

[xx yy]
Number
100
101
102
051200
103
104
105
106
051200
107
108
109
110
111
112
113
114
16
Nuclei
Checksum Flash Checks the FLASH checksum.
Flash Write Access 1 Checks whether the first
FLASH can be written. Check if Write enable pin
of flash is high. The set must be switched off to
restart DSW.
Flash Write Access 2 Checks whether the sec-
ond FLASH can be written. Check if Write enable
pin of flash is high. The set must be switched off
to restart DSW.
Flash Write Read Checks whether we can write
to the FLASH. This test is non-destructive. How-
ever, this test should be used with great caution.
Potential danger exists when power loss occurs
when the test is being executed. The contents of
the NVRAM are changed during the test and are
restored after the test. However, power loss may
occur before the original contents are restored.
Therefore, this test is not included in scripts.
Check if Write enable pin of flash is high. The set
must be switched off to restart DSW.
SdRam Write Read The following three individual
memory tests will be executed: a data bus test,
an address bus test, and a device test. The first
two test for electrical wiring problems and im-
properly inserted chips, while the third is intend-
ed to detect missing chips and catastrophic
failures. As an unintended consequence, the de-
vice test will also uncover problems with the con-
trol bus wiring.
SdRam Write Read Fast The following two indi-
vidual memory tests will be executed: a data bus
test, and an address bus test. The two test for
electrical wiring problems and improperly insert-
ed chips.
Dram Write Read The following three individual
memory tests will be executed: a data bus test,
an address bus test, and a device test. The first
two test for electrical wiring problems and im-
properly inserted chips, while the third is intend-
ed to detect missing chips and catastrophic
failures. As an unintended consequence, the de-
vice test will also uncover problems with the con-
trol bus wiring. Because the DRAM is not
mounted in commercial sets, this test will result in
a failure.
Dram Write Read Fast The following two individ-
ual memory tests will be executed: a data bus
test, and an address bus test. The two test for
electrical wiring problems and improperly insert-
ed chips. Because the DRAM is not mounted in
commercial sets, this test will result in a failure.
Version Displays the version number of the
Sti5505.
Mute On Switches the audio mute of the mono-
board on.
Mute Off Switches the audio mute of the mono-
board off.
De-Emphasis On Switches the audio de-empha-
sis filter in the Sti5505 on.
De-Emphasis Off Switches the audio de-empha-
sis filter in the Sti5505 off.
Centre-On-Stereo Pin On Sets the PIO-pin
Centre_on_stereo to '1'.
Centre-On-Stereo Pin Off Sets the PIO-pin
Centre_on_stereo to '0'.