MZ-N505
SECTION 4
TEST 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.
SETTING METHOD OF TEST MODE
There are three different methods to set the test mode:
1Short SL801 (TEST) on the MAIN board with a solder bridge (connect pin <zvn of IC801 to the ground). Then, turn on the power.
– MAIN Board (Conductor Side) –
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| C809 |
| SL801 |
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C815 | C821 |
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| C625 | (TEST) | ||||
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+ | + |
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| R823 | C816 |
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| R822 |
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| R824 | R857 |
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96 194 190 186 182 187 | 189 193 |
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98 192 209 184 183 185 | 191 197 195 |
| R858 | R825 |
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17 211 215 207 173 175 | 180 178 |
| R817 | C814 | FB801 |
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04 213 188 181 179 171 | 176 174 |
| R827 |
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| 177 169 | 172 170 |
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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.
Set LCD display
All lit
All off
Microcomputer version
display | V1.100 |
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•When the X key is pressed and hold down, the display at that time is held so that display can be checked.
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 or 3:
Turn off the power.
2In the normal mode, turn on the [HOLD] switch. While press- ing the [VOL
>t > t . t . t > t
. t > t . t X t X
3In the normal mode, turn on the [HOLD] switch. While pressing the x key, press the keys on the remote com- mander with the following order:
>t > t . t . t > t . t
>t . t X t X
Note: If electrical adjustment (CD and MO overall adjustment) has not been finished completely, “NV Error” is displayed on LCDs of the set and the remote commander.
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