FM/MW/LW CD CLOCK RADIO
Model Name Using Similar Mechanism
Optical Device Name
Optical Pick-UP Name
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
North and South America and Australia:
Other countries: 24-hour system
77 mm (3 1/8 inches) dia., 4
(headphones) jack (ø 3.5 mm stereo minijack)
(except North American model)
1.2 W + 1.2 W
(at 10% harmonic distortion)
220-230 V AC, 50 Hz
× 153 × 207 mm (w/h/d)
(Approx. 9 7/8
× 6 1/
× 8 1/
4 inches) incl.
projecting parts and controls
Approx. 1,700 g (3 lb. 12 oz.)
Design and specifications are subject to change
Ver 1.1 2001. 04
Personal Audio Company
Shinagawa Tec Service Manual Production Group
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TABLE OF CONTENTS
1. GENERAL ········································································ 4
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
5-1. 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.
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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
The flexible board is easily damaged and should be handled with
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
This Compact Disc player is classified as a CLASS 1
The CLASS 1 LASER PRODUCT label is located on the
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
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
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Setting the Clock
1 Set the alarm setting dial to ALARM
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.
· 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
· 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)
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.
This section is extracted from
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2-1. CABINET, LOWER
Note: Follow the disassembly procedure in the numerical order given.
Optical pick-up block (KSM-213CDM)
Panel (front) sub assy
2 Two screws
3 Three screws
5 Cabinet, lower
1 Four screws
· The equipment can be removed using the following procedure.