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12
MZ-R900
888
003 V1.000
Microcomputer
version
display
Destination code
002 : Except US, Canadian models
003 : US, Canadian models
All off
All lit
BASS12
C830
+
L801
C809
+
C813
C801
1112241
51048
316
7229
9419
189596
22827
341521
381723
401628
262025
4224113
513031
453635
475044
534959
565455
615762
5860
68
63
81
137
65
70
135
67
77
133
74
79
3
1
667376
4
0
3
IC801
SL801
(TEST)
– MAIN Board (Conductor Side) –
2 In the normal mode, turn on the [HOLD] switch. While press-
ing the [VOL --] key press the following order:
> t > t . t . t > t
. t > t . t X t X
SECTION 4
TEST MODE
Operation in Setting the Test Mode
• When the test mode becomes active, first the display check mode
is selected.
• Other mode can be selected from the display check mode.
• When the test mode is set, the LCD repeats the following dis-
play.
Remote commander LCD display
• When the X key is pressed and hold down, the display at that
time is held so that display can be checked.
Caution: On the set having the microcomputer version 1.000,
some adjusted values were set in the manual mode at
the shipment, but these data will be cleared when the
NV is reset. Therefore, on the set having the micro-
computer version 1.000, change the adjusted values
following the Change of Adjusted Values immediately
after the NV was reset (see page 17).
Releasing the Test Mode
For test mode set with the method 1:
Turn off the power and open the solder bridge on SL801 (TEST)
on the MAIN board.
Note: Remove the solders completely. Remaining could be shorted with
the chassis, etc.
For test mode set with the method 2:
Turn off the power.
Note: If electrical adjustment (see page 17) has not been finished com-
pletely, always start in the test mode. (The set cannot start in nor-
mal mode)
Outline
• This set provides the Overall adjustment mode that allows CD
and MO discs to be automatically adjusted when in the test mode.
In this overall adjustment mode, the disc is discriminate between
CD and MO, and each adjustment is automatically executed in
order. If a fault is found, the system displays its location. Also,
the manual mode allows each individual adjustment to be auto-
matically adjusted.
• Operation in the test mode is performed with the set. A key
having no particular description in the text, indicates a set key.
• For the LCD display, the LCD on the remote commander is
shown, but the contents of LCD display on the set are same.
Setting Method of Test Mode
There are two different methods to set the test mode:
1 Short SL801 (TEST) on the MAIN board with a solder bridge
(connect pin 3 of IC801 to the ground). Then, turn on the
power.