TOSHIBA - RR-1552MU - RADIO CLOCK - SCHEMATIC

TOSHIBA - RR-1552MU - Radio Clock - SCHEMATIC (Circuit Diagram)

CIRCUIT DIAGRAM

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SONY CLOCK RADIO ICF- C470 -- C470L CLOCK RADIO ADJUSTMENTS

SONY CLOCK RADIO ICF- C470 -- C470L CLOCK RADIO Adjustments

ICF-C470 --C470L CLOCK RADIO Adjustments & Circuit Diagram _ SONY CLOCK RADIO

ADJUSTMENTS

Setting the clock and the date

Plug in the unit.  The display will flash ‘AM 12:00” or “0:00”.

While holding down CLOCK, press the Time-Set+ or –ve till the correct time appears in the display.  When you release the CLOCK, the clock begins to operate..  the clock system varies depending on the model you own.  12- hour system: “AM 12:00” = Midnight.  24 hour system “0:00” = Midnight.  To set the current time rapidly, keep pressing the “TIME SET” + or – ve while holding down the clock.

OPERATING THE RADIO

Press RADIO ON / SLEEP to turn on the radio and adjust VOLUEME.  Select FM, AM / LW and tune in to a station using TUNING.

ADJUSTING THE BRIGHTNESS OF THE DISPLAY

Set BRIGHTNESS to the position which gives you the desired display visibility [High or Low].  To turn OFF the radio, press RADIO OFF / ALARM RESET / OFF. 

TO IMPROVE RADIO RECEPTION

FM:  extent the FM wire antenna fully to improve FM reception.

AM [MW] / LW: rotate the unit horizontally for optimum reception.  A ferrite bar antenna is built into the unit.

SETTING ALARM

To set the radio alarm, first tune in to a station and adjust volume.

While holding down the ALARM (A) RADIO, for the radio, or (b) BUZZER, for the buzzer, press TIME SET + or – till the desired time appears in the display.

When you release ALARM OR THE ALARM A or B indicator stops flashing and lights up, and the current time in the display.  The alarm will come on at the preset time and will automatically turn itself off after 59 minutes.

ADJUSTING THE ALARAM LEVEL

Adjust the loudness of the alarm by setting B BUZZER VOLUEME to Small, Medium or Big.  If you set Alarm A and alarm B to the same time, only Alarm A will work.  The Buzzer Volume switch affects only the loudness of the buzzer alarm.  Use Volume to adjust the volume of the radio alarm.  To shut off the Alarm, press Radion Off / Alarm reset / Off.  The alarm will come on at the preset time the next day.  To cancel either alarm, press Radion Off / Alarm Reset / Off while holding dowon alarm A or B.

To doze for a few minutes, press NOOZW/DATE/SLEEP OFF.  The alarm will shut off, but will come on again after 6 minutes.  You can repeat this process as many times as you like.  To check the preset time, press ALARM (A) or (B)

SETTING THE SLEEP TIMER

Press RADIO ON/SLEEP.  The radio turns on.

Press RADIO ON/SLEEP repeatedly until the desired preset time appears on the display (90,60,45 or 15 minutes).  For every push the display changes as: Current time > 90 > 60 > 45 > 30 > 15 >  <(Back to current time).  The radio will play for the duration you have set, and will then turn off automatically.  To turn on the radio before the preset time, press SNOOZE/DATE/SLEEP OFF.

ICF-C470 Schematic & PWB

ICF-C470L Schematic & PWB

DISASSEMBLY

CHASSIS & PARTS

CABINET & PARTS

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SONY ICF C470 - ICF C470L - DISASSEMBLE - CERAMIC FILTER CHANGING

SONY ICF C470 - ICF C470L - DISASSEMBLE - CERAMIC FILTER CHANGING

DISASSEMBLE PROCEDURE

• Remove 5 screws and remove lower cabinet.

MAIN BLOCK

DIAL POINTER SETTING

POWER CORD SETTING

CHANGING THE CERAMIC FILTER

• This model uses two ceramic filters of CF2 and CF3.  You must use same type of color marked ceramic filters in order to meet same specifications.
• Therefore, the ceramic filter must changed two pieces together since its supply two pieces in one package as spare parts.

SONY ICF CD2000 - CLOCK -RADIO - CD PLAYER - HOW TO DISASSEMBLE

SONY ICF CD2000 - CLOCK -RADIO - CD PLAYER - HOW TO DISASSEMBLE

CABINET - LOWER ASSEMBLY

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CABINET UPPER

FRONT SUB ASS'Y - CABINET

OPTICAL PICKUP [CDM-2911 EBA]

MAIN BOARD

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

SONY ICF CD 2000

HOW TO ENTER SERVICE MODE -  - 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.

SONY ICF C-135 _ FM/AM CLOCK RADIO _ SERVICE HELP_SCHEMATIC DIAGRAM [CXA 1019S_LM8560N]

SONY ICF C-135 _ FM/AM CLOCK RADIO _ SERVICE HELP_SCHEMATIC DIAGRAM [CXA 1019S_LM8560N]

SCHEMATIC DIAGRAM

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HOW TO CHANGE THE FF CERAMIC FILTERS

This model is used two ceramic filters of CF1 and CF3.  You must use same type of color marked ceramic filters in order to meet same specifications.  Therefore, the ceramic filter must change two pieces together since it's supply two pieces in one package as a spare parts.

CORD DRESSING (POWER, ANTENNA, BATTERY)

Connect the power cord, antenna cord, and battery cord as shown in the figure.

Mount the chassis with screws (PTP3 ×10).  Note: Tighten completely the screws (PTP3 ×10).

DIAL POINTER SETTING

 EXPLODED VIEW

SONY ICF-C470_SONY ICF-C470L_CLOCK RADIO_SCHEMATIC DIAGRAM- (CIRCUIT DIAGRAM)

SONY ICF-C470_SONY ICF-C470L_CLOCK RADIO_SCHEMATIC DIAGRAM- (Circuit Diagram)

Schematic Diagram

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SONY ICF-793_ SONY ICF-793L _ CLOCK RADIO_SCHEMATIC _ (CIRCUIT DIAGRAM)

SONY ICF-793_ SONY ICF-793L _ CLOCK RADIO_SCHEMATIC _ (Circuit Diagram)

SCHEMATIC

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SONY ICF-C795RC CLOCK RADIO_ _ SCHEMATIC_(CIRCUIT DIAGRAM) _ [U4226B_UPD753106GC-064-AB8]

CLOCK RADIO_SONY ICF-C795RC_SCHEMATIC_(Circuit Diagram) _ [U4226B_UPD753106GC-064-AB8]

SCHEMATIC

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PANASONIC RC6256 - CLOCK RADIO - SCHEMATIC - HOW TO DISASSEMBLE

RC6256 - Panasonic clock radio - Schematic - how to disassemble

Disassemble procedure

Circuit Diagram

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SHARP ATOMIC WALL CLOCK TIME SETTING

•      Atomic clocks are the perfect timekeeper.  They receive a radio signal that automatically synchronizes them to one of the atomic clocks maintained by the US Government, so they are always correct, down to second, with no need to provide other adjustments.  However, because the clocks are located in different time zones, with different local laws for Daylight Saving Time, some additional configuration is required.  
•      Setting time on a Sharp Atomic Wall Clock is described here.

1. Insert batteries into the clock, and verify the proper functioning of the display.
2. Set the correct Time Zone and DST [Daylight Saving Time] switches.  The switches are on the back of this clock.  
3. Select EST  if you are in Eastern Standard Time, CST if you are in Central Standard Time, MST if you are in Mountain Standard Time or PST if you are in Pacific Standard Time.  
4. The DST selector should be set to "Off" or "On" depending on the lows of your state. 
5. Wait [15] minutes.  The clock should synchronize automatically.  
6. To set the clock manually using the buttons on its back panel if the clock does not catch radio signals within the first 15 minutes.  Push the correct button to advance the month/day/year on the calender, use the Mode Button to set hour and minute.
7. The clock should adjust itself within 48 hours to match the atomic signal.  Verify that if the clock is receiving the signal by checking the front display.  Should show the image of a tower with circular lines at the top

 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.

PANASONIC RC6256 - CLOCK RADIO - SCHEMATIC - HOW TO DISASSEMBLE

RC6256 - Panasonic clock radio - Schematic - how to disassemble

Disassemble procedure

Circuit Diagram

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