Sony ICFCD-823-L Service manual
ICF-CD823L
SERVICE MANUAL
Ver 1.1 2001. 04
SPECIFICATIONS
CD player section
System: Compact disc digital audio system
Laser diode properties: Material: GaAlAs
Wavelength: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW
(This output is the value measured at a
distance of about 200 mm from the objective
lens surface on the optical pick-up block with
7 mm aperture.)
Frequency response: 20-20,000 Hz
Wow and flutter: Below measurable limit
Radio section
Frequency range:
Band Channel step
FM 87.5-108 MHz 0.05 MHz
MW 531-1,602 kHz 9 kHz
LW 153-279 kHz 9 kHz
–1.5
+1
dB
AEP Model
UK Model
Model Name Using Similar Mechanism CFD-930L
Optical Device Name KSM-213CDM
Optical Pick-UP Name KSS-213C
General
Time display:
North and South America and Australia:
12-hour system
Other countries: 24-hour system
Speaker:
77 mm (3 1⁄8 inches) dia., 4 Ω
Output:
i (headphones) jack (ø 3.5 mm stereo minijack)
(except North American model)
Power outputs:
1.2 W + 1.2 W
(at 10% harmonic distortion)
Power requirements:
220-230 V AC, 50 Hz
Dimensions:
Approx. 250 × 153 × 207 mm (w/h/d)
(Approx. 9 7⁄8 × 6 1⁄8 × 8 1⁄4 inches) incl.
projecting parts and controls
Mass:
Approx. 1,700 g (3 lb. 12 oz.)
9-927-932-12
2001D1600-1
© 2001.4
Design and specifications are subject to change
without notice.
FM/MW/LW CD CLOCK RADIO
Sony Corporation
Personal Audio Company
Shinagawa Tec Service Manual Production Group
TABLE OF CONTENTS
1. GENERAL ········································································ 4
2. DISASSEMBLY
2-1. CABINET, LOWER ······················································ 5
2-2. MAIN BOARD ····························································· 6
2-3. PANEL (FRONT) SUB ASSY ······································ 6
2-4. OPTICAL PICK-UP BOLCK (KSM-213CDM) ·········· 7
2-5. TRANSFORMER BOARD··········································· 7
3. TEST MODE ·······························································8
4. ELECTRICAL ADJUSTMENTS ························ 10
5. DIAGRAMS
5-1. BLOCK DIAGRAM ··················································· 11
5-2. CIRCUIT BOARDS LOCATION ······························· 13
5-3. SCHEMATIC DIAGRAM
– MAIN SECTION (1/2) – ·········································· 14
5-4. SCHEMATIC DIAGRAM
– MAIN SECTION (2/2) – ·········································· 17
5-5. PRINTED WIRING BOARD
– MAIN SECTION – ·················································· 20
5-6. PRINTED WIRING BOARD
– PANEL SECTION – ················································· 23
5-7. IC PIN FUNCTION DESCRIPTION ························· 25
5-8. IC BLOCK DIAGRAMS ············································ 26
6. EXPLODED VIEWS
6-1. LOWER CABINET SECTION··································· 29
6-2. UPPER CABINET SECTION ···································· 30
6-3. OPTICAL PICK-UP SECTION
(KSM-213CDM) ························································· 31
7. ELECTRICAL PARTS LIST ································· 32
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
Note on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
— 2 —
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down 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.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1
LASER DIODE AND FOCUS SEARCH
OPERATION CHECK
1. Open the CD lid.
2. Turn on S501 as following figure.
3. Confirm that the laser diode emission while observing the
objecting lens. When there is no emission, Auto Power Control
circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.
Insert a precision
screwdriver and
push S501.
laser diode
emission
This Compact Disc player is classified as a CLASS 1
LASER product.
The CLASS 1 LASER PRODUCT label is located on the
bottom exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
— 3 —
SECTION 1
GENERAL
Setting the Clock
and Date
1 Set the alarm setting dial to ALARM
MODE OFF.
2 Plug in the clock radio.
The display will flash “AM 12:00” or “0:00”.
3 Press CLOCK for a few seconds.
You will hear a beep and the year will start to
flash in the display.
4 Press CLOCK + or – until the correct
year appears in the display.
5 Press CLOCK once.
6 Repeat steps 4 and 5 to set the month,
day, hour, and minute.
After setting the minute, press CLOCK to start
the counting of the seconds, and you will
hear two short beeps.
This section is extracted from
instruction manual.
• To display the year and date, press SNOOZE/
DATE/SLEEP OFF once for the date, and within
2 seconds press it again for the year. The
display shows the date or year for a few
seconds and then changes back to the current
time.
• To set the current time rapidly, hold down
CLOCK + or –.
• The clock system varies depending on the
model you own.
12-hour system: “AM 12:00” = midnight
24-hour system: “0:00” = midnight
• In step 6, when you press CLOCK after the
minute setting to activate the clock, the seconds
start counting from zero.
• When the alarm setting dial is set to ALARM
TIME SET A or B, the clock cannot be set.
To change the display to the
daylight saving time (summer time)
indication
Press D.S.T./SUMMER T.
“s” is displayed and the time indication
changes to summer time.
To deactivate the summer time function, press
D.S.T./SUMMER T. again.
— 4 —
SECTION 2
r
DISASSEMBLY
• The equipment can be removed using the following procedure.
Cabinet, lower
Set
Note: Follow the disassembly procedure in the numerical order given.
Main board
Transformer board
2-1. CABINET, LOWER
2 Two screws
1 Four screws
(+BVTP 3 × 10)
(+P 3 × 14)
Panel (front) sub assy
Optical pick-up block (KSM-213CDM)
3 Three screws
(+P 3 × 14)
5 Cabinet, lowe
4 Connector
— 5 —
2-2. MAIN BOARD
r
r
)
4 Panel (front) assy
1 Four screws
(+P 3 × 10)
0 Flat cable
8 Screw
(+P 3 × 10)
2 Connector
5 Screw
(+P 3 × 10)
7 Key (upper) board
qa Connector
9 Screw
(+P 3 × 10)
qs Main board
3 Connecto
6 Connecto
2-3. PANEL (FRONT) SUB ASSY
5 Knob (alarm) (A)
7 Panel (front)
sub assy
6 Button (alarm) (A)
4 Dial (alarm) assy
— 6 —
3 Three screws
(+BTP 2.6 × 6)
2 Key (front) board
1 Four screws
(+BTP 2.6 × 6
s
2-4. OPTICAL PICK-UP BLOCK (KSM-213CDM)
2 Cover (unit)
1 Screw
(+P 3 × 10)
2-5. TRANSFORMER BOARD
4 Two screws
(2.6 × 10)
5 Optical pick-up
block (KSM-213 CDM)
3 Two screws
(+BTP 3 × 10)
3 Two screw
(2.6 × 10)
1 Screw (+BTP 3 × 10)
2 Stopper, cord
4 Heat sink
5 Transformer board
power cord
Power board
— 7 —
SECTION 3
TEST MODE
3-1 LCD Test Mode
• The LCD test mode is initiated by turning off the main power once then back on or by resetting the machine while TP415 (LCD TEST, pin60 terminal) is connected to GND.
• The LCD test mode operations are listed in the following table.
• When the machine enters the LCD test mode, all LCDs turn on.
• Pressing any key turns off the corresponding segment of the LCD.
Correspondence between the keys and segments of LCD are as follows.
(LCD segment)
KEY
1
2
3
4
5
BAND
SNOOZE
D.S.T
CLOCK +
CLOCK
1a, 1b, 1c, 1d, 1e, 1g
2a, 2b, 2c, 2d, 2e, 2f, 2g,
3a, 3b, 3c, 3d, 3e, 3f, 3g,
4a, 4b, 4c, 4d, 4e, 4f, 4g,
5a, 5b, 5c, 5d, 5e, 5f, 5g,
FM, MW, LW
SLEEP
s
6a, 6b, 6c, 6d, 6e, 6f, 6g,
:, .
SEGMENT
KEY
CLOCK
OFF
CD
RADIO
WAKE UP TRACK
CD PLAY MODE
TUEN +
TUEN –
SEGMENT
AM, PM,
A CD
CD H
RADIO
TRACK
REP, 1, ALL, SHUFFLE, CD
B RADIO
B BUZZER
• Pressing the [ALARM TIME CHECK] button at end of the LCD test mode shows the version number of the software on the LCD.
• The alarm-dial position detection can be checked and displayed if the alarm-dial is operated while the version number is being displayed
on LCD.
• State of the [ALARM-B: RADIO/BUZZER] slide switch position can be detected and displayed on the alarm picture.
3-2 CD Test Mode
3-2-1 CD TEST-1 (AUTO)
• The CD TEST-1 (AUTO) mode is initiated by turning off the main power once then back on or by resetting the machine while TP414 (CD
TEST, pin-59 terminal) is connected to GND.
• When the machine enters CD TEST-1 (AUTO) mode, it repeats the focus search until the focus becomes OK.
• After the focus becomes OK and the focus is automatically adjusted, rough servo is locked in and the adjustment value is displayed.
F-E BALANCE ADJUSTMENT
TRACKING GAIN ADJUSTMENT
FOCUS BIAS ADJUSTMENT
AM
CD
SRUFFLE
TRACK
• The sled can be moved to the innermost track by pressing the minus (-) button. The sled can be moved to the outermost track by pressing
the plus (+) button.
• When the BAND button is pressed, the machine enters the CLVA (servo ON) and the mute is turned OFF if data is read successfully.
When the following button is pressed, the corresponding operations are performed.
a) 1 Setting the 1 track jump
b) 2 Setting the 10 track jump
c) 3 Setting the 100 track jump
Afterwards the desired track jump can be set by pressing the plus (+) or minus (-) button.
d) 4 TRACKING GAIN-UP
e) BAND’s rough servo
• P5 Restarts CD TEST-1 (AUTO) mode from the focus automatic adjustment
• When the CD button is pressed then, the track jumps to the second session and the machine exits the CD TEST-1 (AUTO) mode.
• When the OFF button is pressed, the CD playback is stopped. If the CD button is pressed again, the machine repeats operations from the
focus search.
3-2-2 CD TEST-2 (MANUAL)
• The CD TEST-2 (MANUAL) mode is initiated by turning off the main power once then back on or by resetting the machine while TP413
(A MUT, pin-58 terminal) is connected to GND.
• When the machine enters CD TEST-2 (MANUAL) mode, it repeats the focus search until the focus becomes OK.
• After the focus becomes OK, the machine enters the rough servo.
• The sled can be moved to the innermost track by pressing the minus (-) button. The sled can be moved to the outermost track by pressing
the plus (+) button.
• When the BAND button is pressed, the machine enters the CLVA (servo ON) and the mute is turned OFF if data is read successfully. When
the BAND button is pressed again, the machine enters the rough servo.
• When the CD button is pressed then, the track jumps to the second session and the machine exits the CD TEST-2 (MANUAL) mode.
• When the OFF button is pressed, the CD playback is stopped. If the CD button is pressed again, the machine repeats operations from the
focus search.
— 8 —
CD TEST-1
FOCUS
OK
Y
Auto adjustment
Rough servo
CD button
TEST MODE END
The second music
played back.
CD button
Y
N
Sled maement
N
+button
+button
jump has
been set?
Y
BAND
button
Servo ON
BAND
button
OFF
button
YYYY
CD STOP
OFF
button
YYY
123 4 5
Y
YYYY
CD
button
CD TEST-2
FOCUS
OK
Y
Rough servo
+button
Y
Sled maement
N
Execntes the
setting of jump.
BAND
button
Y
Servo ON
CD
button
YY
TEST MODE END
The second music
played back.
Sets the respective
setup valnes.
OFF
button
CD STOP
TRACKING
GAIN UP
+button
BAND
button
OFF
button
— 9 —
CD
button
CD
button
YYYYY
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