VIDEO CD PLAYER
Model Name Using Similar Mechanism
CD Mechanism Type
Base Unit Type
Optical Pick-up Type
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TABLE OF CONTENTS
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
! OR DOTTED LINE WITH
! 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.
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.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
This caution label is located inside
The laser component in this product is
capable of emitting radiation exceeding
the limit for Class 1.
Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
SERVICING NOTE ················································ 3
TEST MODE ·································································· 4
GENERAL ······································································ 6
CABINET ··········································································· 7
BASE UNIT (BU-5BD24) ················································· 7
ELECTRICAL ADJUSTMENTS ····························· 8
CIRCUIT BOARDS LOCATION ···································· 10
BLOCK DIAGRAM -- BD SECTION -- ······················ 11
BLOCK DIAGRAM -- MAIN SECTION -- ················· 13
SCHEMATIC DIAGRAM -- BD SECTION -- ············· 15
PRINTED WIRING BOARD -- BD SECTION -- ········ 17
SCHEMATIC DIAGRAM -- DISPLAY SECTION -- ·· 19
PRINTED WIRING BOARD
-- DISPLAY SECTION -- ·············································· 21
PRINTED WIRING BOARD -- MAIN SECTION -- ··· 24
-- MAIN SECTION (1/2) -- ··········································· 27
6-10. SCHEMATIC DIAGRAM
-- MAIN SECTION (2/2) -- ··········································· 30
6-11. IC PIN FUNCTION ························································· 33
6-12. IC BLOCK DIAGRAMS ················································· 37
MAIN SECTION ····························································· 41
MECHANISM SECTION (CDM14M-5BD24) ·············· 42
BASE UNIT SECTION (BU-5BD19) ····························· 43
ELECRICAL PARTS LIST ······································ 44
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This model has the self-diagnosis function for the video and audio
Immediately after the power on, the self-diagnosis function searches
each operation of IC's around the mechanism control microcomputer
The LED (D101) on the MAIN board indicates their results.
[MAIN BOARD] -- SIDE A --
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
Insert a tapeing driver into the aperture of the unit bottom, and turn in
the direction of arrow (to OUT direction).
* To close the disc table, turn the driver in the reverse direction (to IN
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
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.
LASER DIODE AND FOCUS SEARCH OPERATION
Carry out the "S curve check" in "CD section adjustment" and check
that the S curve waveform is output three times.
LED (D101) INDICATION
1 Time blinking (Repeatedly)
2 Time blinking (Repeatedly)
Video decoder error
Video RAM error (IC102)
Pull out disc table.
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VIDEO CD COLOR-BARS MODE
On this mode, the data of the color-bars signal as a picture signal
and the 1kHz sine wave signal as a sound signal are output by the
mechanism control microcomputer (IC104) for video CD signal
check. When measurement of the voltage and waveform on the
MAIN board, perform it in this mode.
For reference, the color-bars signal can be observed at J302 (VIDEO
OUT) and the sound signal can be observed at J302 (AUDIO OUT)
using an oscilloscope.
Turn the power on.
Connect the SL101 (C BAR (MICON)) on the MAIN board
After measuring, remove the soldering installed.
SERVO CHECK MODE
Connect the SL102 on the MAIN board with solder.
Turn the power on.
Coefficient display and gain display
The following hexadecimal data is displayed on the FL tube
when the JOG SELECTOR key is pressed. Every pressing of
the JOG SELECTOR key toggles between the following
Pressing of the DNR key toggles between ON and OFF of the
tracking and sled servo.
Pressing the PLAY MODE key (KARAOKE PON in K750)
during playback increases the FB value (every 4 steps).
Pressing the REPEAT key (SURROUND in K750) decreases
the FB value (every 4 steps).
Pressing the COMET key toggles between the normal speed
and double speed.
Pressing the RETURN key toggles between the CTRL2 ports.
B key performs re-measurement of focus bias.
MIN SEC INDEX
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Lighting of All Fluorescent Indicator Tube
Displays and Key Check Mode
Connect SL103 (PANEL) on the MAIN board with solder.
Turn the power on.
All the Fluorescent Indicator tube displays light up.
Press any button to enter the key check mode. In the key check
mode, each time a button is pressed, figures displayed on the
Fluorescent Indicator tube displays increase. However, figures
will not increase for buttons which have been pressed once.
The button number corresponding to the button pressed will
also be displayed. Button numbers are displayed only while
the corresponding buttons are pressed.
After the test mode, remove the soldering installed.
[ MAIN BOARD ] -- SIDE A --
Count up display
Button number display
Button Number (Displayed only while a
button is pressed.)
All Fluorescent Indicator tube displays
Music calendar light up alternately
(odd number to even number)
7-segments displays light up alternately
The odd number digits and the even
number digit of the upper 7-segments
displays and the lower 7-segments displays
light up alternately.