Sony ICFCD-2000, ICFCD-2000-S Service manual
ICF-CD2000/CD2000S
SERVICE MANUAL
Ver 1.0 1999. 10
Photo: ICF-CD2000 (US model)
SPECIFICATIONS
US Model
Canadian Model
E Model
Tourist Model
ICF-CD2000
AEP Model
UK Model
ICF-CD2000S
Model Name Using Similar Mechanism D-E551
Optical Device Name CDM-2911EBA
Optical Pick-Up Name DAX-11E
MICROFILM
ICF-CD2000
FM/AM CD CLOCK RADIO
ICF-CD2000S
FM/SW/MW CD CLOCK RADIO
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 3
2. GENERAL ................................................................... 5
3. DISASSEMBLY ......................................................... 8
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
4. SERVICE MODE...................................................... 11
5. TEST MODE.............................................................. 12
6. ELECTRICAL ADJUSTMENTS......................... 15
7. DIAGRAMS
7-1. IC Pin Function Description........................................... 21
7-2. Block Diagram – CD Section – ..................................... 23
7-3. Block Diagram – Main Section – ................................... 27
7-4. Printed Wiring Boards – MAIN/JACK Boards – .......... 31
7-5. Schematic Diagram – MAIN/JACK Boards – .............. 35
7-6. Printed Wiring Boards – LCD/KEY Boards – .............. 40
7-7. Schematic Diagram – LCD/KEY Boards –................... 45
8. EXPLODED VIEWS ................................................ 53
9. ELECTRICAL PARTS LIST ............................... 57
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
HOW TO CHANGED THE 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 be changed two pieces together
since it’s supply two pieces in one package as a spare parts.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
– 2 –
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body .
During repair, pay attention to electrostatic breakdown and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
Before Replacing the Optical Pick-Up Block
Please be sure to check thoroughly the parameters as par the “Optical Pick-Up Block Checking Procedures” (Part No.: 9-960-027-
11) issued separately before replacing the optical pick-up block.
Note and specifications required to check are given below.
• FOK output: IC501 ts pin
• S curve P-to-P value: 1.2 Vp-p IC501 wa pin
When checking S curve P-to-P value, remove the lead wire to
disc motor.
• RF signal P-to-P value: 0.8 to 1.3 Vp-p
• Traverse signal P-to-P value: 0.7 to 1.8 Vp-p
• The repairing grating holder is impossible.
Precautions for Checking Emission of Laser Diode
Laser light of the equipment is focused by the object lens in the
optical pick-up so that the light focuses on the reflection surface
of the disc. Therefore, be sure to keep your eyes more then 30 cm
apart from the object lens when you check the emission of laser
diode.
Laser Diode Checking Methods
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper panel is closed while turning
ON the S423. (push switch type)
However, in the service mode, the laser diode always emits light
even if S423 is not turned on.
The following two checking methods for the laser diode are operable.
• Method-1 (In the service mode or normal operation):
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S423 as shown in Fig. 1.
(Unnecessary in the service mode)
3. Press the
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 pick-up.
During normal operation, the laser diode is turned ON about
2.5 seconds for focus searching.
u
[CD ] key.
– 3 –
Fig. 1 Method to push the S423
9
• Method-2 (In the service mode or normal operation):
Check the value of current flowing in the laser diode.
1. Remove the upper panel.
2. Connect a digital voltmeter as show in Fig. 2.
3. Press the [CD ] key.
u
4. Calculate current v alue by the reading of the digital v oltmeter .
Reading of the digital voltmeter (V) ÷ 2.2 (Ω) = current value
(A)
(Example) Reading of the digital voltmeter of 0.082 V:
0.082 V÷2.2 Ω= 0.037 (A) = 37 mA
Current value of the specified: 16 to 18 mA
5. Check that the current value is within the following range.
• Current value of the specified mA (25 ˚C)
+5
–11
Variation by temperature: 0.4 mA/˚C
Current increases with temperature increased.
Current decreases with temperature decreased.
If the current is more than the range above, there is a trouble
in the automatic power control circuit or the laser diode is in
deterioration.
If less than the range, a trouble exists in the automatic power
control circuit or the optical pick-up.
– MAIN Board (Conductor Side) –
digital voltmeter
(DC3 V range)
TP
(GND)
C586
14
13
+
C585 C587
C551
C595
C494
R476
R477
C495
R478
9
16
FB401
R539
9
C545
C493
C565
IC404
C568
L511
+
C569
C564
+
C419R483
8
1
TP
(RF)
D512
L508
L515
AK
D504
+
C533
R535
Q505
R549
R591
Q514
C552
BCE
C536
C542
+
+
C543
C535
+
C561
R567
BCE
R501
R851
+
C515
C555
2C1B 1E
Q503
C516
R524
2E2B 1C
BCE
R576
R575
Q507
C534
TP
(TE)
C807
C806
C805
A
K
A
R844
Fig. 2 Digital voltmeter connecting location
2C1B 1E
Q502
2E2B1C
R558
+
C520
C553
C502
C505
R525
R584
C504
C559
C506
R566
R854
2E
C554
2B
1C
C519
1-673-930-
(VC)
R557
TP
(IOP 1)
R568
C541
R565
Q501
C803
2C
1B
1E
C801
R631
D501
AK
C510
R552
R553
1C
Q513
C609
L501
2B 2E
1B 2C1E
R632
+
C610
C619
Q601
BCE
+
R850
C608
TP
(IOP 0)
C540
+
TP
+
–
11
(11)
– 4 –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
– 5 –
– 6 –
– 7 –
• This set can be disassembled in the order shown below.
SECTION 3
DISASSEMBLY
Cabinet (lower) assy
Set
Optical pick-up
(CDM-2911EBA)
Note: Follow the disassembly procedure in the numerical order given.
Cabinet (upper)
Main board
CABINET (LOWER) ASSY
5
cabinet (upper) assy
Cabinet (front) sub assy
4
flat wire (CN301)
1
Open the battery case lid.
3
four claws
2
five screws
(2
3
two claws
6
cabinet (lower) assy
3
×
8)
3
two claws
two claws
– 8 –
CABINET (UPPER)
e
2
four claws
3
cabinet (upper)
1
screw (2 × 8)
2
two claws
2
three claws
1
screw (2 × 8)
CABINET (FRONT) SUB ASSY
4
Pull out two flat wires.
5
6
cabinet (front) sub assy
cover
knob (open)
A
2
Slide the knob (open)
in the direction of the
arrow A, and open th
cabinet front assy.
cabinet (front) assy
3
connector (CN701)
– 9 –
1
screw (2 × 8)
OPTICAL PICK-UP (CDM-2911EBA)
)
1
connector (CN501)
3
optical pick-up
(CDM-2911EBA)
2
three connectors
(CN601, 602, 603
MAIN BOARD
6
screw (2 × 8)
4
Remove two solders.
7
main board
3
two screws
(B1.7 × 5)
5
jack board
2
telescopic antenna
– 10 –
1
screw (B3 × 6)
SECTION 4
SERVICE MODE
Service Mode (Service program)
The equipment is provided with a service program built in the
microcomputer, like conventional models.
Service program operation methods are described in the following.
• Step 1 (Service mode setting methods)
1. Connect TP447 (CD TEST 2) to the TP444 (GND).
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 (Operation in the service mode)
1. Once the service mode is effected, the LCD displays 18 indications each of which is repeatedly displayed.
2. By pressing the > or . key , the optical pick-up is movable inwardly or outwardly . Howe ver, if this is acti vated, tracking servo and sled servo are turned OFF, so it can be turned
ON by pressing the [BAND] key if required.
3. Without disk, focus searching is repeated continuously.
4. By pressing the
CLV-A (servo in PLAY) are turned ON. Then playing begins.
No muting is ON in the service mode.
[BAND] key, tracking servo, sled servo and
• Step 3 (Resetting of service mode)
1. Remove external power supply.
2. Disconnect TP447 (CD TEST 2) and TP444 (GND), and also
TP453 (RESET) and TP444 (GND).
– LCD Board (Component Side) –
TP444
(GND)
(CD TEST 2)
TP453
(RESET)
TP447
Fig. 3 Location of CD TEST terminal
– 11 –
SECTION 5
TEST MODE
[Test Mode 1]
• Step1 (Test mode 1 setting methods)
1. Connect TP445 (CD TEST 1) to the TP444 (GND).
2. Insert external power supply.
• Step2 (Operation in the test mode 1)
1. 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.
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 pick-up moves to almost center of 12 cm 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.
• Step3 (Resetting of test mode 1)
1. Remove external power supply.
2. Disconnect TP445 (CD TEST 1) and TP444 (GND).
[Test Mode 2]
• Step1 (Test mode 2 setting methods)
1. Connect TP447 (CD TEST 2) to the TP444 (GND).
2. Insert external power supply.
u
[Test Mode 3]
• Step1 (Test mode 3 setting methods)
1. Connect TP448 (CD TEST 3) to the TP449 (GND).
2. Insert external power supply.
• Step2 (Operation in the test mode 3)
1. The same operation as in test mode 2 is performed. However,
the LCD test mode is displayed same as in test mode 1.
• Step2 (Operation in the test mode 2)
1. The CD auto adjustment is performed. Also, the ESP can be
turned ON or 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,
u
[CD ] key is pressed. At this time, the spindle and
if the
tracking servos turn OFF. Also, when the focus becomes OK,
the optical pick-up moves to almost center of 12 cm 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.
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 check
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.
u
– 12 –
[LCD Display Check Mode]
• Step1 (LCD display check mode setting metyods)
1. Connect TP446 (TUNER TEST) to the TP444 (GND).
2. Insert external power supply.
• Step2 (Operation in the LCD display check mode)
1. All segments of LCD light up if the LCD display check mode
is activated.
2. If each key is pressed, the LCD display is as shown below. At
the same time, for some keys, the following operation is performed.
[CLOCK]:
WORLD
AM
BUZZER
TIMEDIF
[ESP]:
[ALARM TIME]:
AM
Buzzer sound OFF
[SNOOZE]:
FM 2
MW
LED ON
[ALARM TRACK/STATION]:
E
CD
CD
N
Beep sound ON
[CD PLAY MODE]:
Beep sound OFF
[WORLD/LOCAL]:
LOCAL
PM
[D.S.T SUMMER T.]:
PRESET
ESP
INTROSCAN
REPEAT ALL
SHUFFL
REPEAT1
SLEEP
WAKEUP
LED OFF
>
[ ]:
.
[ ]:
[BAND]:
[PRESET 1]:
FM1
AM
MHz
kHz
[ALARM MODE]:
Buzzer sound ON
RADIO
SW
PM
[PRESET 2]:
– 13 –
[PRESET 3]:
[PRESET 4]:
[PRESET 5]:
x
[ OFF, ALARM RESET]: All lit
• Step3 (Resetting of LCD display check mode)
1. Remove external power supply.
2. Disconnect TP446 (TUNER TEST) and TP444 (GND).
Connecting Location:
– LCD Board (Conductor Side) –
TP448
(CD TEST 3)
TP449
(GND)
TP445
(CD TEST 1)
TP444
(GND)
TP446
(TUNER TEST)
TP447
(CD TEST 2)
– 14 –
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