SONY CXJT9
Service Manual

CX-JT9

[GC TEST MODE]
� This mode is used to check the fluorescent indicator tube, LED and key. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 2] simultaneously. 3. Fluorescent indicator tube and LEDs are all turned ON. 4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2] simultaneously, mode is changed over. 5. In the key check mode, press each key, the defined key number of every each key list is displayed on the fluorescent indicator tube. 6. In the key count check mode, �K-CNT 0� is displayed on the fluorescent indicator tube. Each time a key is pressed, �K� value increases. However, once a key is pressed, it is no longer taken into account. 7. In the headphone input check mode, connect the headphone, the message �H_P ON� is displayed on the fluorescent indicator tube, and disconnect the headphone, the message �H_P OFF� is displayed on the fluorescent indicator tube. 8. In the volume check mode, turn the [VOLUME] knob, the display on the fluorescent indicator tube is changed over to �VOL UP�, �VOL FLAT� or �VOL DOWN�

[MODEL, DESTINATION AND VERSION DISPLAY]
� This mode is used to check the model, destination and software version. Procedure: 1. Set to the standby state. 2. Press three keys of x , [TECHNO] and [HEAVY] simultaneously. 3. When the model, destination and version display mode is activated, the model an destination is displayed on the fluorescent indicator tube. 4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2] simultaneously, mode is changed over to model and destination display mode and version display mode. 5. In the version display mode, press the [DISC DIRECT PLAY 3] key, display is changed over to version display and year, month and day of the software creation display. 6. To release from this mode, press the two keys of [TECHNO] and [HEAVY] simultaneously.

[CD SERVICE MODE]
� This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the optical pick-up. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press the [CD] key to select �CD�. 3. Press three keys of x , [HEAVY] and Z simultaneously. 4. When the CD service mode is activated, the message �TRVS ON� is displayed on the fluorescent indicator tube. 5. Press the M key, optical pick-up move to outside track and the message �SLED OUT� is displayed on the fluorescent indicator tube. 6. Press the m key, optical pick-up move to inside track and the message �SLED IN� is displayed on the fluorescent indicator tube.. 7. Press the [TECHNO] key, traverse ON/OFF is changed over.

[MC TEST MODE]
� This mode is used to check operations of Amplifier. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 3] simultaneously. 3. When the MC test mode is activated, the message �MC MODE� is displayed on the fluorescent indicator tube momentarily, then VACS level is displayed on the fluorescent indicator tube. 4. Press the [TECHNO] key, the display on the fluorescent indicator tube is changed over to �EQ MAX�, press the [MANUAL] key, the display on the fluorescent indicator tube is changed over to �EQ MID�, press the [HIP HOP] key, the display on the fluorescent indicator tube is changed over to �EQ MIN�, 5. Turn the [VOLUME] knob, the display on the fluorescent indicator tube is changed over to �VOL MAX�, �VOL MID� or �VOL MIN� 6. When the [REC PAUSE/START] key is pressed with a tape set in the deck-B, the function is switched �MD� or �VIDEO� and recording starts. When the m or M key is pressed during recording, the tape is rewound back to the beginning of recording, the function is switched to �TAPE B�, then playback starts. 7. When the [CD SYNC] key is pressed with the test tape (AMS100, AMS-110A) in the deck, number of space between tunes is counted, then if AMS-110A is set, �OK� is displayed on the fluorescent indicator tube and if AMS-100 is set, �NG� is displayed on the fluorescent indicator tube. 8. To release from this mode, press the [POWER] key.

[5 REPEAT LIMIT CANCEL]
� Number of repeat for CD playback is 5 times when the repeat mode is �REPEAT�. This mode is used to enables CD to repeat playback for limitless times. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press the [CD] key to select �CD�. 3. Press three keys of x , [HEAVY] and Y simultaneously.

20