SONY HCDMC3AV
Service Manual

SECTION 3 TEST MODE
[MC Cold Reset] * The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer. Procedure: 1. Press the three buttons STOP , ENTER and FUNCTION at the same time. 2. The fluorescent indicator tube turns off for a moment and the RAM is reset to the initial conditions. [MC Hot Reset] * This mode resets the set with the preset data kept stored in the memory. This hot reset mode is performed also when the power cord is plugged in and out. Procedure: 1. Press the three buttons STOP , ENTER and GROUP 1 at the same time. 2. The fluorescent indicator tube turns off for a moment and the RAM is reset to the initial conditions. Procedure: 1. Press the three buttons STOP , ENTER and GROUP 2 at the same time. The HCD-MC3AV enters the GC test mode, and all of the fluorescent tubes and LEDs turn on. 2. From this state, any one of the three modes GROUP 1, GROUP 2 and GROUP 3 can be selected. Go to step 3 to enter the GROUP 1 test mode. Go to step 5 to enter the GROUP 2 test mode. Go to step 11 to enter the GROUP 3 test mode. 3. [GROUP 1 test mode ] From the state of step 2, press the GROUP 1 button. Every pressing of the GROUP 1 button advances the following check modes and displays in the given order. Model name display, destination display, MC version display, GC version display, DC version display, VC version display and CC version display. 4. To exit the GC test mode and to return to the STANDBY mode, press the STOP , ENTER and GROUP 2 buttons again. 5. [GROUP 2 test mode ] You can enter this mode directly from step 2. When you performed steps 3, perform steps 4, then 1 and 2 before starting the step 5. [GROUP 2 test mode ] From the GC test mode, press the GROUP 2 button to enter the key check mode. The display: K 1, J 0, V 0 appears. 6. The value after K indicates the number of times that the key is pressed. 1 is displayed because the GROUP 2 button has already been pressed. 7. When other keys are pressed one after another, the key count increases up to 43. The keys which have already been pressed, are not counted. 8. The value after J indicates the number of clicks that the JOG dial is rotated. The clockwise rotation increases the count value. The counter-clockwise rotation decreases the count value. 9. The value after V also indicates amount of rotation of volume control. The clockwise rotation increases the count value. The counter-clockwise rotation decreases the count value. 10. To exit the GC test mode and to return to the STANDBY mode, press the STOP , ENTER and GROUP 2 buttons again. 11. [GROUP 3 test mode ] You can enter this mode directly from step 2. When you performed steps 3, perform steps 4, then 1 and 2 before starting the step 5. [GROUP 3 test mode ] From the GC test mode, press the GROUP 3 button to enter the VACS attenuation check mode. The display: VOL NORMAL appears. 12. To exit the GC test mode and to return to the STANDBY mode, press the STOP , ENTER and GROUP 2 buttons again. [MC Test Mode] * This mode checks operation of amplifier and cassette deck. How to enter the MC test mode: Press the three buttons of STOP , ENTER and GROUP 3 . �EQ CHECK� display on the FL tube and the VOLUME display flash. In addition the LEDs of the JOG dial, FF and REW flash indicating the MC test mode. Check procedure: You can perform any of the following five steps. However, it is recommended to perform them in the following order because the skipped cannot be performed if the checks are not performed in the given order. 1. EQ Check Mode The GEQ becomes maximum when the JOG dial is turned clockwise. The GEQ becomes minimum when the JOG dial is turned counter-clockwise. The GEQ comes to center when the FILE SELECT button is pressed.

[CD Initial] * The CD INITIAL clears all of the CD related data. Execute this mode when returning the set to the customer.

Procedure: 1. Press the three buttons STOP , ENTER and GROUP 4 at the same time. 2. The message �STANDBY� appears on the fluorescent indicator tube and the CD related data is reset to the initial conditions.

[CD Line Test] * The CD Line test displays the rotating time required for one rotation by rotating the disc tray. Procedure: 1. Press the three buttons STOP , ENTER and GROUP 5 at the same time. The CD PLAY LED and the CD PAUSE LED flash alternately and the disc tray starts rotation. 2. The message �xx << y.y� appears on the fluorescent indicator tube. The left numbers count up the discs starting from 1 to 51. The left numbers �y.y� indicate the rotating time required for one rotation by rotating the disc tray. 3. To exit the CD LINE test mode, execute the MC Hot Reset.

[CD Memo All Clear] * The mode clears all contents of the CD disc memo. Execute this mode when returning the set to the customer. Procedure: 1. Press the two buttons MEMO INPUT and FLASH at the same time. 2. The message �ALL ERASE� appears on the fluorescent indicator tube and the CD disc memo is all cleared.

[GC Test Mode] * This mode checks microprocessor version number, keys, fluorescent tubes, LEDs and VACS (Variable Attenuation Control System).

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