HOW TO ENTER SERVICE MODE - SONY ICF CD 2000 - TEST MODE

SERVICE MODE

• Connect TP447 (CD TEST 2) to the TP444 (GND).
• Turn ON the S423 (CD OPEN switch).
• Insert external power supply.
• Connect TP453 (RESET) to the TP444 (GND) to make open. (Reset).

SERVICE MODE OPERATION

• Once the service mode is affected, the LCD displays 18 indications each of which is repeatedly displayed.
• By pressing the >>| or |<< key, the optical pick-up is movable inwardly or outwardly. However, if this is activated, tracking servo and sled servo are turned OFF, so it can be turned ON by pressing the [BAND]key if required.
• Without disk, focus searching is repeated continuously.
• By pressing the [BAND key, tracking servo, sled servo and CLV-A (servo in PLAY) are turned ON. Then playing begins.  No muting is ON in the service mode.

RESETTING SERVICE MODE

• Remove external power supply.
• Disconnect TP447 (CD TEST 2) and TP444 (GND), and also TP453 (RESET) and TP444 (GND).

PCB Component side & test points

TEST MODE

Connect TP445 (CD TEST 1) to the TP444 (GND).

Insert external power supply.

• The CD auto adjustment is not performed, but LCD test mode is displayed. Also, ESP is placed in OFF state and it does not turn ON.
• The sled is operating while the >>| or |<< key is pressed.  At this time, the spindle and tracking servos turn OFF.
• The focus search is performed until the focus becomes OK, if the CD >>| key is pressed. At this time, the spindle and tracking servos turn OFF. Also, when the focus becomes OK, the optical pick-up moves to almost center of 12 cm disc.
• The spindle and tracking servos turn ON when the BAND key is pressed. Also, the mute turns OFF if the data is correct.

Resetting of Test Mode -1

Remove external power supply.

Disconnect TP445 (CD TEST 1) and TP444 (GND).

TEST MODE -2

Connect TP447 (CD TEST 2) to the TP444 (GND).

Insert external power supply.

• The CD auto adjustment is performed. Also, the ESP can be turned ON or OFF.
• The sled is operating while the >>| or |<< key is pressed. At this time, the spindle and tracking servos turn OFF.
• The focus search is performed until the focus becomes OK, if the CD ►|| key is pressed. At this time, the spindle and tracking servos turn OFF. Also, when the focus becomes OK, the optical pick-up moves to almost center of 12 cm disc.
• The spindle and tracking servos turn ON when the BAND key is pressed. Also, the mute turns OFF if the data is correct.
• The pickup jumps by one track if ►►|  or |◄◄  key is pressed when the spindle and tracking servos turn ON, or it jumps continuously if the key is kept pressed. Also, if the PRESET key is pressed, the following operation is performed.

[PRESET 1]   1 track jump

[PRESET 2]   4 track jump

[PRESET 3]  16 track jump

[PRESET 4]  32 track jump

[PRESET 5]  256 track check

• The pickup jumps to the second music and the test mode is released, if CD ►|| key is pressed when the spindle and tracking servos turn ON.