SONY HCDBX5
Service Manual

[MC Test Mode] � This mode is used to check operations of the respective sections of Amplifier, Tuner, CD and Tape. Procedure: 1. Press the ?/1 button to turn on the set. 2. Press the three buttons of x , ENTER and DISC 3 simultaneously. 3. A message �TEST MODE� appears on the FL display tube. 4 When f (CURSOR UP) button is pressed, GEQ increases to its maximum and a message �GEQ ALL MA� appears. 5. When F (CURSOR DOWN) button is pressed, GEQ decreases to its minimum and a message �GEQ ALL M1� appears. 6. When g (CURSOR LEFT) or G (CURSOR RIGHT) button is pressed, GEQ is set to flat and a message �GEQ FLAT� appears. 7. When the VOLUME control knob is turned clockwise even slightly, the sound volume increases to its maximum and a message �VOLUME MAX� appears for two seconds, then the display returns to the original display. 8. When the VOLUME control knob is turned counter-clockwise even slightly, the sound volume decreases to its minimum and a message �VOLUME MIN� appears for two seconds, then the display returns to the original display. 9. In the test mode, the default-preset channel is called even when the TUNER is selected and an attempt is made to call the preset channel that has been stored in memory, by operating the Shuttle knob. (It means that the memory is cleared.) 10. When CD is selected and the EDIT button is pressed, the disc that is being chucked at this moment becomes the default setting. It means that the default disc only is accessed when any other discs are selected even though the display indication changes accordingly. At the same time, the DISK SKIP EXCHANGE and OPEN/CLOSE cannot be accepted. (It means that the tray motor and the turntable motor are disabled of their operation.) 11. When a tape is inserted in Deck B and recording is started, the input source function selects VIDEO automatically. 12. When x button is pressed to stop recording, the Tape (Deck) B is selected and tape is rewound using the Shuttle knob, tape is rewound, tape is stops at around the record-starting position and playback of the recorded portion of the tape is started. If PAUSE is inserted even once during recording, tape is rewound to the position around the PAUSE position and is played back. 13. When the CD SYNC HI-DUB Button is press during playback of Deck B, either normal speed or high speed can be selected by this button. 14. Select the desired loop by pressing the PLAY MODE button. Insert a test tape AMS-110A or AMS-RO to Deck A. 15. Press the SPECTRUM button to enter the AMS test mode. 16. After a tape is rewound first, the FF AMS is checked, and the mechanism is shut off after detecting the AMS signal twice. 17. Then the REW AMS is checked and the mechanism is shut off after detecting the AMS signal twice. 18. When the check is complete, a message of either OK or NG appears. 19. When you want to exit this mode, press the ?/1 button twice. The cold reset is enforced at the same time.

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