Sony MDS-M9, Руководство по обслуживанию

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— 5 —
Forced Reset Switch
The switch on the power board (S101) is the forced reset switch for
IC201.
Press it for about one second after turning on the power after
disassembling and assembling the unit again.
• Parts Location
[POWER BOARD] — Component side —
Note for replacement of IC121 and IC171 on the BD board
IC121 on the BD board of this unit has modified from CXD2535AR to CXD2535BR due to an improvement.
Some contents of nonvolatile memory in the IC171 are modified according to this modification. When replacing IC171, the previous contents
for IC121 (CXD2535AR) are written as an initialized value from the system control IC. (When replacing IC171, turn the power on once to
write an initialized value.)
In case the IC171 on the BD board is replaced, which uses CXD2535BR to IC121, see the following procedure to rewrite the contents of
nonvolatile memory. As for replacement of IC121, use CXD2535BR to rewrite the contents of IC171.
CXD2535BR
93
1A
1A
CXD2535AR
90
33
33
ADDRESS
15
2D
2E
How to rewrite the nonvolatile memory
1
Press the
p
button, EDIT/NO button and REPEAT button at the same time when the POWER of set is turned OFF (Be sure to release
the three buttons at the same time.)
2
Turn the SELECTOR knob to be displayed “EEP MODE”.
If the ENTER/YES button is pressed, the display will be changed to “EEP
∗∗
@@”.
(
∗∗
: Address, @@ : data)
3
Turn the SELECTOR knob to be displayed “EEP 15 @@”.
4
If the SELECTOR knob is pressed, “EEP 15 @@ > @@” will be displayed. So turn the SELECTOR knob to be displayed “EEP 15 @@
> 93”.
5
Pressing the ENTER/YES button, “Complete!” is displayed once, “EEP 15 93” is displayed, and the data is rewritten.
6
As for the address 2D and 2E, rewrite each of them to “1A” following the steps
3
to
5
as well.
7
After the all modification are complete, press the EDIT/NO button to be displayed “EEP MODE”.
8
Press the REPEAT button. In case a disc is unloaded, the display “STANDBY” will be go on and off, then unplug the power plug. In case
a disc is loaded, “STANDBY” is displayed once and the disc is ejected. After that, unplug the power plug from an outlet to be out from the
EEP rewriting mode.
Note : The modification in the contents of nonvolatile memory is not reflected if the power is not turned off once.
Table Comparison between CXD2535AR and CXD2535BR
regarding the contents of nonvolatile memory
CN104
S101
CN102