MZ-N1
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.
•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 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) and turn on the [HOLD]
switch. Then, turn on the power.
–MAIN Board (Conductor Side) –
SL801 |
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| S801 [HOLD] switch | ||||||||
(TEST) |
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| OFF t ON (HOLD) | ||||||||
| SL801 |
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| C850 | ||
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| C820 |
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| C821 | C818 |
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| + C810 | |||
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| C813 | ||
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| SL506 |
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| 195 | 199 178 174 170 166 164 158 1 | |||||
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| FB802 |
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| 193 197 203 180 176 172 168 162 160 1 | ||||
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| R842 |
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| C509 |
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| 189 191 |
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| 187 185 | 175 171 169 167 163 159 1 | |||||
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| R841 |
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| 182 183 | 173 179 177 201 165 161 1 | |||
| C510 |
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| 186 184 | 207 181 |
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| 190 209 | 215 188 |
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| C511 |
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| FB801 |
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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.
Remote commander LCD display
All lit | 888 |
All off |
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Microcomputer
version 001 V1.000 display
•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 [VOLUME
>t > t . t . t > t
. t > t . t X t X
3In the normal mode, turn on the [HOLD] switch. While pressing the x/CHG key, press the keys on the remote commander with the following order:
N> t N> t . t . t N> t
. t N > 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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