SONY - ICF-CD2000 ICF- CD2000S FM-AM CD-CLOCK RADIO SERVICE MODE.

Part-1

LASER DIODE CHECKING METHOD & SERVICE MODE ENTRY METHOD

LASER DIODE CHECKING

Method -1

1. Open the upper lid.
2. Push the [S423]
3. Press [CD >|| ] key.
4. Check the object lens for confirming normal emission of the laser diode.  If not emitting, there is a trouble in the automatic power control circuit or the Optical pickup.   During normal operation, the laser diode is turned On about 2.4 seconds for focus and searching.

Method -2

1. Remove the upper panel.
2. Connect a digital voltmeter between  TP(10P1) and TP(10P2); can located at the right top corner of the PCB. {Main board:  Conductor side}
3. Press the { CD >|| } key.
4. Calculate current value by reading of the digital voltmeter.  [The reading of the digital voltmeter (V) / 2,2Ohms + Current value {A}.  Example:  Reading of digital voltmeter of 0.082V:  (0.082/2.2Ohms = 0.037A = 35 mA).  Current value of the specified:  16 to 18 mA.
5. If the current is more than the range above, there is a trouble in the automatic power control circuit or the Laser Diode in the deterioration.  If less than the range, a trouble exists in the automatic power control circuit or the Optical Pickup.

SERVICE MODE

Step-1

1. Connect TP447(CD TEST-2) to TP444(GND).  {LCD board:  Component Side}.
2. Turn On the S423 (CD open Switch).
3. Insert external power supply.
4. Connect TP453 (Reset) to the TP444 (GND) to make open. (Reset)

Step -2

1. Once the service mode is effected, the LCD displays [18] indications each of which is repeatedly displayed.
2. By pressing [ >>| ] or [ |<< ] key, the optical pickup is movable inwardly or outwardly.  However, it this is activated, tracking servo and sled servo are turned Off.  So it can be turned ON by pressing the 'BAND" key if required.
3. Without disc, focus search is repeated continuously.
4. By pressing "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 OF SERVICE MODE

• Remove the external power supply.
• Disconnect TP447 & TP444, and also TP453 & TP444.

SONY - ICF-CD2000 ICF-CD2000S SERVICE ADJUSTMENTS 

Part-2

TEST MODE

TEST MODE-1

(Test Mode-1 Setting Methods)

1. Connect TP455 to TP444.
2. Insert external power supply.

Step - 2 [Operation in Test Mode-1]

1. The CD auto adjustment is not performed, but LCD test mode is displayed.  Also ESP is placed OFF state and it does not turn ON.
2. The 'sled' is operating, while the ( >>| ) or ( |<< ) key is pressed.  At this time, the spindle and tracking servos turn Off.
3. The 'focus' search is performed until the focus becomes OK, if the CD  [CD >|| ] key is pressed.  At this time, the spindle and tracking servos turn Off.  Also when the focus becomes OK, the optical pickup moves almost center of the 12cm disc.  
4. The spindle and tracking servos turn ON when the (Band) key is pressed.  Also, the 'mute' turns Off if the data is correct.  

Step -3. [Resetting of Test Mode]

1. Remove the external power supply.
2. disconnect TP455 & TP444.

TEST MODE - 2

Step - 1 (Test mode-2 setting methods)

1. Connect TP447 to TP444.
2. Insert external power supply.

Step -2 (Operation in test mode-2)

1. The CD auto adjustment is performed.  Also, the ESP can be turned On of Off.  
2. The 'sled' is operating, while the ( >>| ) or ( |<< ) key is pressed.  At this time the spindle and tracking servos turn OFF.
3. 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 pickup moves at almost center of 12 cm disc.
4. The spindle tracking servos turn ON, when the (Band) key is pressed.  Also, the 'mute' turns Off if the data is correct.  
5. 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 jump.

6.  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.

TEST MODE - 3

Step-1 (Test mode-3 setting methods)

1. Connect TP448 to TP449.
2. Insert external power supply.

Step-2 (Operation in the Test mode-3)

• The same operation as in test mode-2 is performed.  however the LCD test mode is displayed same as in test mode-1.