Sony CMT-L1 / HCD-L1 Service Manual ▷ View online
2
HCD-L1
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ
F
1.5 k
Ω
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
General
Power requirements
North American model:
North American model:
120 V AC, 60 Hz
European model:
230 V AC, 50/60 Hz
Other models:
110 - 240 V AC ,
50/60 Hz
50/60 Hz
Power consumption
European model:
European model:
See the nameplate
0.2 W (at the Power
Saving Mode)
0.2 W (at the Power
Saving Mode)
Other models:
See the nameplate
Dimensions (w/h/d)
Approx. 293
× 246 ×
131 mm incl. projecting
parts and controls
parts and controls
Mass
Approx. 3.5 kg
Design and specifications are subject to change
without notice.
without notice.
AM tuner section
Tuning range
North American model:
North American model:
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,710 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 10 kHz)
531 - 1,710 kHz
(with the tuning interval
set at 9 kHz)
European model:
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 9 kHz)
Other models:
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna
AM loop antenna, external
antenna terminal
antenna terminal
Intermediate frequency
450 kHz
3
HCD-L1
TABLE OF CONTENTS
1. SERVICING NOTES
······················································· 4
2. GENERAL
·········································································· 5
3. DISASSEMBLY
3-1.
Bottom Plate,Case ························································ 9
3-2.
Front Panel Section ······················································ 9
3-3.
POWER Board, AM/FM Tuner ·································· 10
3-4.
MAIN Board ······························································ 10
3-5.
AMP Board, Regurator ·············································· 11
3-6.
Door Panel, LED Board (R), Indicator ······················ 11
3-7.
LED Board (L) ··························································· 12
3-8.
FL (L1) Board ···························································· 12
3-9.
SWITCH Board, TOUCH SWITCH Board ··············· 13
3-10. CD Board ··································································· 13
3-11. CD-mechanism (CDM71A) ······································· 14
3-12. L.MOTOR Board ······················································· 14
3-13. ENCODER Board, D.sensor Board ··························· 15
3-14. RTL Pulley Assy ························································ 15
3-15. BD Board ··································································· 16
3-16. C.MOTOR Board, L.SENSOR Board ······················· 16
3-17. Base Unit ···································································· 17
3-18. Holder Assy, Sled Motor Assy ··································· 17
3-19. RTR Pulley Assy ························································ 18
3-20. SPT Pulley Assy ························································· 18
3-11. CD-mechanism (CDM71A) ······································· 14
3-12. L.MOTOR Board ······················································· 14
3-13. ENCODER Board, D.sensor Board ··························· 15
3-14. RTL Pulley Assy ························································ 15
3-15. BD Board ··································································· 16
3-16. C.MOTOR Board, L.SENSOR Board ······················· 16
3-17. Base Unit ···································································· 17
3-18. Holder Assy, Sled Motor Assy ··································· 17
3-19. RTR Pulley Assy ························································ 18
3-20. SPT Pulley Assy ························································· 18
4. TEST MODE
···································································· 19
5. ELECTRICAL ADJUSTMENTS
······························· 22
6. DIAGRAMS
6-1.
Block Diagrams CD Section ····································· 23
MAIN Section ···························································· 24
MAIN Section ···························································· 24
6-2.
Circuit Boards Location ············································· 25
6-3.
Printed Wiring Board BD Section (Side A) ·············· 26
6-4.
Printed Wiring Board BD Section (Side B) ·············· 27
6-5.
Schematic Diagram BD Section ······························· 28
6-6.
Schematic Diagram CD Section ······························· 29
6-7.
Printed Wiring Board CD Section (Side A) ·············· 30
6-8.
Printed Wiring Board CD Section (Side B) ·············· 31
6-9.
Printed Wiring Board MOTOR Section ···················· 32
6-10. Schematic Diagram MOTOR Section ······················· 33
6-11. Printed Wiring Board MAIN Section (Side A) ········· 34
6-12. Printed Wiring Board MAIN Section (Side B) ········· 35
6-13. Schematic Diagram MAIN Section (1/2) ·················· 36
6-14. Schematic Diagram MAIN Section (2/2) ·················· 37
6-15. Printed Wiring Board AMP Section (Side A) ··········· 38
6-16. Printed Wiring Board AMP Section (Side B) ··········· 39
6-17. Schematic Diagram AMP Section ····························· 40
6-18. IC Block Diagrams ····················································· 41
6-19. Printed Wiring Board DISPLAY Section ·················· 42
6-20. Schematic Diagram DISPLAY Section ····················· 43
6-21. Printed Wiring Board SWTICH Section ··················· 44
6-22. Schematic Diagram SWTICH Section ······················ 45
6-23. Printed Wiring Board POWER Section ···················· 46
6-24. Schematic Diagram POWER Section ······················· 47
6-25. IC PIN FUNCTION DESCRIPTION ························ 48
6-11. Printed Wiring Board MAIN Section (Side A) ········· 34
6-12. Printed Wiring Board MAIN Section (Side B) ········· 35
6-13. Schematic Diagram MAIN Section (1/2) ·················· 36
6-14. Schematic Diagram MAIN Section (2/2) ·················· 37
6-15. Printed Wiring Board AMP Section (Side A) ··········· 38
6-16. Printed Wiring Board AMP Section (Side B) ··········· 39
6-17. Schematic Diagram AMP Section ····························· 40
6-18. IC Block Diagrams ····················································· 41
6-19. Printed Wiring Board DISPLAY Section ·················· 42
6-20. Schematic Diagram DISPLAY Section ····················· 43
6-21. Printed Wiring Board SWTICH Section ··················· 44
6-22. Schematic Diagram SWTICH Section ······················ 45
6-23. Printed Wiring Board POWER Section ···················· 46
6-24. Schematic Diagram POWER Section ······················· 47
6-25. IC PIN FUNCTION DESCRIPTION ························ 48
7. EXPLODED VIEWS
7-1.
Case Section ······························································· 51
7-2.
Chassis Section ·························································· 52
7-3.
Front Panel Section ···················································· 53
7-4.
Mechanism Section(CDM71A)-1 ······························ 54
7-5.
Mechanism Section(CDM71A)-2 ······························ 55
7-6.
Base Unit Section (BU-31BD63A) ···························· 56
8. ELECTRICAL PARTS LIST
······································· 57
4
HCD-L1
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED LINE WITH
MARK
0
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.
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
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.
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
other than those specified herein may result in hazardous radiation
exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of 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 HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
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.
SECTION 1
SERVICING NOTES
This caution
label is
located inside
the unit.
label is
located inside
the unit.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR 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 PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
5
HCD-L1
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
List of Button Locations and Reference Pages
How to use this page
Use this page to find the location of buttons and other
parts of the system that are mentioned in the text.
parts of the system that are mentioned in the text.
Main unit
ALPHABETICAL ORDER
A – F
CD cover 2 (11)
CD u 7 (11 - 13)
CD x 8 (11, 12)
DISPLAY 6 (17, 20, 21)
Display 1 (20, 21)
FUNCTION qa (11 - 14, 16, 23,
CD u 7 (11 - 13)
CD x 8 (11, 12)
DISPLAY 6 (17, 20, 21)
Display 1 (20, 21)
FUNCTION qa (11 - 14, 16, 23,
25)
P – Z
PHONES jack qf
PLAY MODE/TUNING MODE
PLAY MODE/TUNING MODE
qd
(11 - 16, 25)
Remote sensor qg
TUNER/BAND 9 (15, 16, 25)
TUNING +/– qs (15, 16)
VOL +/–
TUNER/BAND 9 (15, 16, 25)
TUNING +/– qs (15, 16)
VOL +/–
(19)
Illustration number
PLAY MODE qg (9, 13, 14)
R
R
Name of button/part
Reference page
1
2
3
6789
q;
qa
qd
qg
qf
5
BUTTON DESCRIPTIONS
/1
?
(power) 4 (8, 19)
./> qs (11 - 13)
m/M qs (11)
Z 3 (11)
V OPEN 5
m/M qs (11)
Z 3 (11)
V OPEN 5
To open the front cover, push
down on V OPEN.
down on V OPEN.
q;
4
qs
