CMT-SP55TC, TC-SP55 - Sony Audio Service Manual (repair manual). Page 3

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This unit cannot be repaired by itself.
When repairing, connect the whole system except for the speaker.

Procedure :
1. When the power ON, press the  ?/1  button (TA) while pressing  TUNING MODE  button (ST) and  REPEAT  button (CDP) together.
2. Frame of the MD mark and the CD mark flash, and “BASS/TRE FLAT” appears for a moment.
3. When the  VOLUME  knob (TA) is turned clockwise, “VOLUME MAX” appears for a moment.
4. When the  VOLUME  knob (TA) is turned counterclockwise, “VOLUME MIN” appears for a moment.
5. Select the function “TAPE” using the  FUNCTION  knob (TA).

Set the test tape AMS-110A or AMS-120.

6. Press  DIRECTION  button (TC) to enter either “j” (loop) or “h” (two way).
7. Press the  CD SYNC REC  button (TC) to start the AMS test.

8. Number of AMS signals is counted during the AMS test and the message “EDG#” (# means a number) appears.  When the test tape

either AMS-110A or AMS-120 is used, the AMS signal is detected twice before shut off.

9. When the AMS test ends, either “OK” or “NG” appears.
10.To exit the MC test mode, either press the  ?/1  button (TA) or perform the cold reset as described above.

• When the AC cord is removed, COLD RESET is done with TC-SP55.

Procedure :
1. When the power ON, press the  ?/1  button (TA) while pressing the  TUNING MODE  button (ST) and PLAY MODE  buttons (CDP)

together.

2. LCD are all turned on.
3. Press  TUNING MODE  button (ST) to enter the model destination indecation mode. “SP55    CE2” or “SP55    ASIA2” appears.
4. Every pressing of  TUNING MODE  button (ST) changes the display in the following order.

MC Version 

t CD Version t ST Version t TC Version t TA Version t TM Version t model destination display.

5. Press  DISPLAY  button (ST) and the date appears as “ 00615a ”

Every pressing of  DISPLAY  button (ST) changes the display in the Version display and model destination display.

6. Press  TUNER/BAND  button (ST) to enter the key check mode.
7. In the key check mode, the fluorescent indicator tube displays “Key 0 Vol 0”. Each time a button is pressed, “Key” value increases.

However, once a button is pressed, it is no longer taken into account.
“Vol” Value increases like “1, 2, 3 ...” if rotating  VOLUME  knob (TA) in the clockwise direction, or decreases like “0, 9, 8 ...” if rotating
in the counterclockwise diretion. (The TC-SP55 is not count.)

8. To exit from this mode, disconnect the power cord.