Sony HCD-L7HD User manual

HCD-L7HD
US Model
Canadian Model
AEP Model
UK Model
SERVICE MANUAL
MICRO Hi-Fi COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-874-073-03
2003L16-1
© 2003.12
Ver 1.2 2003. 12
SPECIFICATIONS
This set is the tuner, CD, HD and amplifier
section in CMT-L7HD.
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM71B
Base Unit Type BU-31BD63
CD
SECTION
— Continued on next page —
Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 4-ohm loads, both channels driven, from
120 - 10,000 Hz; rated 25 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
North American model:
Continuous RMS power output (reference):
25 + 25 W
(4 ohms at 1 kHz, 10%
THD)
European model:
DIN power output (rated): 20 + 20 W
(4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25 W
(4 ohms at 1 kHz, 10%
THD)
Music power output (reference):
25 + 25 W
Other models:
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 20 + 20 W
(4 ohms at 1 kHz, DIN,
110 V - 240 V AC)
Continuous RMS power output (reference):
25 + 25 W
(4 ohms at 1 kHz, 10%
THD, 110 V - 240 V AC)
Inputs
MD/TAPE IN (stereo minijack):
Sensitivity 450 mV (MD)/
250 mV (Tape),
impedance 47 kilohms
DIGITAL OPTICAL IN (Supported sampling
frequencies: 32 kHz, 44.1 kHz and 48 kHz)
Outputs
MD/TAPE OUT (stereo minijack):
Sensitivity 250 mV,
impedance 1 kilohmes
PHONES (stereo minijack):
Accepts headphones with
an impedance of 8 ohms
or more
DIGITAL CD OPTICAL OUT (Supported sampling
frequency: 44.1 kHz)
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ= 795 nm)
Emission
duration: continuous
Frequency response 2 Hz – 20 kHz
HD recorder section
Capacity 20 GB
Recording system ATRAC 3
Transfer rate 132 kbps
Maximum recording time About 300 h
Maximum number of albums
Library area: 250
Flexible area: 250
Maximum number of tracks
20,000
Maximum number of tracks per album
400
Maximum CD-HD ripping speed
Max. ×2
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model: 87.5 - 108.0 MHz
(100-kHz step)
Other models: 87.5 - 108.0 MHz
(50-kHz step)
Antenna FM wire antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
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)
European model: 531 - 1,602 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)
Antenna AM loop antenna, external
antenna terminal
Intermediate frequency 450 kHz

2
HCD-L7HD
General
Power requirements
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
Power consumption
European model: See the nameplate
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
Mass Approx. 4.3 kg
Design and specifications are subject to change
without notice.
Self-diagnosis display
Messages
One of the following messages may appear or
flash in the display during operations.
CD
Complete!
CD editing (Disc Memo) finished normally.
File Full
There are already 100 disc titles stored in the
system.
Initialize
The system is being initialized. You cannot load a
CD during this time. Wait until “Initialize”
disappears from the display.
No Disc
There is no disc in the CD player.
—OVER—
You have reached the end of the CD while
pressing and holding down Mduring playing
pause.
Push STOP!
You pressed PLAY MODE on the remote during
playback.
You pressed STORAGE MODE during playback.
You pressed STORAGE MODE during manual
recording of a CD.
Step Full!
You tried to program 26 tracks (steps) or more.
HD
Already Done
You tried to perform High-Speed Synchro Storage
for a CD that has already been completely
recorded.
Auto Cut
The system is pausing the recording because
silence continued for 30 seconds or more during
digital recording.
Blank Disc
There is no track on the HD.

3
HCD-L7HD
Drive Error
Consult your Sony dealer or local authorized Sony
service facility.
Drive Full!
Recording tracks is not possible because there is
not enough recordable space on the HD or the
maximum number of recordable tracks has been
reached.
Erasing
The system is erasing data from the HD. Do not
disconnect the power cord.
Format Error
Consult your Sony dealer or local authorized Sony
service facility.
Impossible
You tried to make an impossible editing or
recording operation.
Library Making
The system is recording data to the HD.
Name Full!
The naming capacity of the HD has reached its
limit (about 127 characters).
No Name
The album or track has not been labelled.
No Signal
The system has detected a silent portion during
recording.
Not Found
No matches were found for Keyword Search.
Please Wait
You tried to perform High-Speed Synchro Storage
while the system was collating data between the
CD and the HD.
You tried to perform High-Speed Synchro Storage
while the system was preparing for Auto Storage
and High-Speed Synchro Storage.
Push STOP!
You pressed PLAY MODE on the remote during
playback.
You pressed SEARCH on the remote during
playback.
Rec Error
Proper recording is not possible.
– Rehearsal –
The HD is playing the specified dividing point for
confirmation during the Divide function.
The HD is playing the specified Highlight position
for confirmation during the Highlight Play
function.
REMOTE
The system is being connected to your computer.*
Retry
The system is retrying reading data from the CD
during High-Speed Synchro Storage.
Smart Space
The signal was input again after silence continued
for 3 or more but less than 30 seconds during
digital recording.
STORAGE NOW
You tried to turn off the system while the system
was storing data to the HD.
TOC Reading
The system is reading data from the HD.
Track End
You have reached the end of the track while
adjusting the dividing point during the Divide
function.
Track Full!
Recording tracks is not possible because there are
400 tracks in the album. Select another album for
recording.
Timer
OFF TIME NG!
The stopping time is the same as the starting time
in the Daily Timer operation.
OVERLAP!
The Daily Timer or timer-recording setting that
you attempted to make partially or wholly
coincides with another setting.
* If “REMOTE” appears under other circumstances,
turn off the system, then turn on it again.
Cannot Copy
You tried to play a CD with a format that the
system does not support, such as a CD-ROM. The
sound source is a copy of commercially available
music software.
Cannot Edit
You tried to edit in Shuffle Play, or you tried to
register a track to a playlist that already contains
400 tracks.
Cannot Play
The system cannot play the track because of
damage to the audio data.
Cannot Rec
You tried to record to the HD with HD selected as
the sound source.
You tried to perform manual recording from the
CD with “AUTO” selected as the storage mode.
You pressed REC with “AUTO” selected as the
storage mode.
You tried to record a CD to the HD without
loading the CD.
Cannot STORAGE
You tried to record to the HD with less than 131
recordable tracks remaining on the HD.
You tried to record to the HD with less than 240
minutes of recordable time remaining on the HD.
You tried to perform High-Speed Synchro Storage
with no blank album in the Library area.
Check OPT-IN
A moment’s lighting is due to the signals of the
digital program being recorded. This does not
affect the recorded material.
While recording from a digital component
connected through the DIGITAL OPTICAL IN
jack, the digital connecting cable was unplugged or
the digital component turned off.
Complete!
The editing operation of the HD is completed.
The system is copying a title or artist name.
Copying
The system is copying the text data.

4
HCD-L7HD
TABLE OF CONTENTS
1. SERVICING NOTES ······················································· 5
2. GENERAL ·········································································· 8
3. DISASSEMBLY ······························································ 10
3-1. Bottom Plate,Case ······················································· 11
3-2. Front Panel Section ····················································· 11
3-3. POWER Board, AM/FM Tuner ··································· 12
3-4. HDD Board, HDD SUB Board ··································· 12
3-5. MAIN Board ······························································· 13
3-6. Cover (HDD-Top), Cover (HDD-Bottom) ·················· 13
3-7. AMP Board, REG Board············································· 14
3-8. Switching Regulator ···················································· 14
3-9. Indicator (BS), LED Board (R) ··································· 15
3-10.LED Board (L) ···························································· 15
3-11.FL Board ····································································· 16
3-12.TOUCH SW Board, SWITCH Board ························· 16
3-13.CD Board····································································· 17
3-14.BD Board····································································· 17
3-15.Base Unit (BU-31BD63) ·············································18
3-16.BU-31 Assy, Sled Motor Assy (M102) ······················· 18
3-17.CD Mechanism (CDM71B) ········································ 19
3-18.L.MOTOR Board························································· 19
3-19.C.MOTOR Board, L.SENSOR Board························· 20
3-20.ENCODER Board, D.SENSOR Board ······················· 21
3-21.Pulley (RTR) Assy, Pulley (RTL) Assy,
Belt (CDM71), Belt (Roller) (L) ································· 22
3-22.Pulley (SPT)Assy, Gear (RT) Assy, Gear(KT),
Belt (CDM71) ····························································· 24
4. TEST MODE···································································· 26
5. ELECTRICAL ADJUSTMENTS ······························· 30
6. DIAGRAMS······································································ 31
6-1. Block Diagrams ··························································· 31
6-2. Circuit Boards Location ·············································· 34
6-3. Printed Wiring Board – BD Section (SideA) –··········· 35
6-4. Printed Wiring Board – BD Section (Side B) –··········· 36
6-5. Schematic Diagram – BD Section –···························· 37
6-6. Printed Wiring Board – MOTOR Section – ················ 38
6-7. Schematic Diagram – MOTOR Section – ··················· 39
6-8. Printed Wiring Board – HDD1 Section (SideA) – ····· 40
6-9. Printed Wiring Board – HDD1 Section (Side B) – ····· 41
6-10.Schematic Diagram – HDD1 Section (1/2) – ·············· 42
6-11.Schematic Diagram – HDD1 Section (2/2) – ·············· 43
6-12.Printed Wiring Board – HDD2 Section – ···················· 44
6-13.Schematic Diagram – HDD2 Section (1/2) – ·············· 45
6-14.Schematic Diagram – HDD2 Section (2/2) – ·············· 46
6-15.Printed Wiring Board – MAIN Section (Side A) – ····· 47
6-16.Printed Wiring Board – MAIN Section (Side B) – ····· 48
6-17.Schematic Diagram – MAIN Section (1/2) – ·············· 49
6-18.Schematic Diagram – MAIN Section (2/2) – ·············· 50
6-19.Printed Wiring Board – CD Section – ························· 51
6-20.Schematic Diagram – CD Section –···························· 52
6-21.Printed Wiring Board – AMP Section (Side A) –········ 53
6-22.Printed Wiring Board – AMP Section (Side B) –········ 54
6-23.Schematic Diagram –AMP Section – ························· 55
6-24.Printed Wiring Board – DISPLAY Section – ·············· 56
6-25.Schematic Diagram – DISPLAY Section – ················· 57
6-26.Printed Wiring Board – CONTROL Section – ············58
6-27.Schematic Diagram – CONTROL Section –··············· 59
6-28.Printed Wiring Board – POWER Section –················· 60
6-29.Schematic Diagram – POWER Section – ··················· 61
6-30.IC Pin Function Descriptions ······································ 63
7. EXPLODED VIEWS ······················································ 72
7-1. Case Section ································································ 72
7-2. Chassis Section···························································· 73
7-3. Frot Panel Section ······················································· 74
7-4. Mechanism Section(CDM71B)-1································ 75
7-5. Mechanism Section(CDM71B)-2································ 76
7-6. Base Unit (BU-31BD63) ············································· 77
8. ELECTRICAL PARTS LIST ······································· 78

5
HCD-L7HD
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.
CAUTION
Use of controls or adjustments or performance of procedures
otherthan those specifiedherein may result inhazardous radiation
exposure.
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 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.
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 forAC leakage. Check leakage as
described below.
LEAKAGE
TheAC 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.
1. A commercial leakage tester,such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operatedAC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operatedAC 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 2VAC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15 µF1.5 kΩ
AC
Voltmeter
(0.75V)
Earth Ground
Fig.A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINEWITH
MARK 0ON 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.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0SUR 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.

6
HCD-L7HD
NOTES ON HARD DISC
The hard disc has a high storage density and reads or writes data in
a short time with compared to the floppy disk. On the other hand, it
may be easily damaged by mechanical vibration, shock or dust.
Keep the hard disc away from magnets.
Although the hard disc has safety devices to prevent losing data due
to mechanical vibration, shock or dust, you should be careful when
handling the recorder. Avoid damaging your data:
•Do not cause a shock or strong vibration to the recorder.
•Do not place the recorder in a location subject to mechanical
vibration or in unstable location.
•Do not move the recorder while the power is on.
•Do not turn off the recorder while the HDD indicator lights up
blue.
•Do not use the recorder in a place subject to extreme changes in
temperature (temperature gradient less than 18 °F (10 °C)/ hour).
•Keep any magnetic objects,including a TV set, speaker, magnet,
and magnetic bracelet, away from the recorder.
If the hard disc is damaged, data cannot be restored or recovered.
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
NOTES ON DIGITAL AMPLIFIER
Cause of the DigitalAmplifier, do not connect the speaker terminals
to the chasis, or connect the terminals of the right speakers with
those of the left speaker. (None of the speaker terminals is the
negative(–) terminal of the speaker. So,do not connect the earth lead
of this unit to the speaker terminals.)

7
HCD-L7HD
• Service Position -1
JIG
(J-2501-077-A)(13P)
BD board
FL board
JIG
(J-2501-076-A)(11P
)
chassis
FM/AM tuner
JIG
(J-2501-167-A)(17P)
• Service Position -2
(Checking For Hard Disc Section)
JIG
(J-2501-076-A)(11P)
JIG
(J-2501-077-A)(13P)
JIG
(J-2501-167-A)(17P)
JIG
(J-2501-202-A)(11P)
BD board
HDD SUB boar
d
HDD IF board
hard disk
chassis
FM/AM tuner

8
HCD-L7HD SECTION 2
GENERAL This section is extracted
from instruction manual.
Main unit
ALPHABETICAL ORDER
A – H
ALBUM dial qf (18, 19, 21, 26)
CD cover 2(14, 15)
CD uqa (14 - 16, 25)
CD xqs (15, 16, 24, 25)
DISPLAY 8(39, 44, 45)
Display window 1(44, 45)
FUNCTION qh (14 - 22, 25 - 28,
30, 32 - 35, 57)
HD u 9(18, 20 - 22, 25, 26)
HD x q; (18, 25, 26, 30)
HIGH SPEED SYNC ql (25)
P – Z
PHONES jack 7
REC w; (26, 28)
Remote sensor 6
STORAGE MODE qk (14, 25,
26)
TUNER/BAND qd (37, 38)
TUNING +/– qj (37, 38)
VOL +/– qg (41)
1
23
789q;qaqsqd
qgqhqjw;qlqk
6
54
qf
BUTTON DESCRIPTIONS
@/1(power) 4(11, 41, 42)
./>qj (15, 16, 18)
m/Mqj (15, 18)
Z3(14, 15)
VOPEN 5
To open the front cover, push
down on VOPEN.

9
HCD-L7HD
Remote control
ALPHABETICAL ORDER
ALBUM eh (19)
ALBUM FAVORITES 7(22)
ALBUM MEMORY 8(22)
ALBUM +/– 6(18, 19, 21, 26)
CAPS rd (16, 31)
CD Nwa (14 - 16, 25)
CD Xqa (15)
CD xq; (15, 16, 24, 25)
CLEAR es (15 - 17, 29, 31, 39)
CLOCK/TIMER SELECT eg
(41 - 43)
CLOCK/TIMER SET ef (13, 41,
42)
CURSOR T/tel (13, 17, 20,
21, 31, 35, 42)
DIMMER 5(44)
DISPLAY wk (39, 44, 45)
DSG qk (40)
ENTER/YES e; (13, 15 - 17,
19 - 21, 27 - 37, 39, 41 - 43, 57)
FM MODE qg (38)
FUNCTION ws (14 - 22, 25 - 28,
30, 32 - 35, 57)
HD N wd (18, 20 - 22, 25, 26)
HD X wf (18, 25, 26)
HD x9(18, 25, 26, 30)
HIGHLIGHT wg (21)
HISTORY +/– wh (22)
MENU/NO ek (17, 20, 27 - 39,
57)
MENU +/– r; (13, 17, 20, 21,
27 - 36, 41 - 43)
NAME rs (16, 39)
Numeric buttons for selecting an
album or track ej (15, 19, 38)
PLAYLIST ed (19, 20)
PLAY MODE qh (14 - 18, 21)
PRESET EQ qj (40)
REPEAT qg (15, 18)
SCROLL 4(17, 45)
SEARCH ea (20)
SLEEP 2(40)
SML ra (16, 31)
Text input buttons wl (16, 31)
TIME wj (16, 44, 45)
TUNER BAND w; (37, 38)
TUNING MODE qh (37, 38)
TUNING +/– qs (37, 38)
VOL +/– qf (41)
BUTTON DESCRIPTIONS
@/1(power) 3(11, 41, 42)
./>ql (15, 16, 18)
m/Mqd (15, 18)
Z1(14, 15)
12 3 wl
wk
qk
wh
wj
wd
ws
qj
qh
ra
el
ek
r;
rs
rd
qg
wa
w;
ql
wf
wg
4
5
6
7
8
e;
ea
es
ed
ej ehegef
9
q;
qa
qs
qd
qf
Setting the clock
1Turn on the system.
2Press CLOCK/TIMER SET on the
remote.
3Press MENU + or – on the remote
repeatedly to set the day, and then
press ENTER/YES or CURSORton
the remote.
The hour indication flashes.
4Press MENU + or – on the remote
repeatedly to set the hour, and then
press ENTER/YES or CURSORton
the remote.
The minute indication flashes.
5Press MENU + or – on the remote
repeatedly to set the minute, and then
press ENTER/YES on the remote.
If you make a mistake
Press TCURSOR or CURSORton the
remote repeatedly until the indication you want
to change (day, hour, minute) flashes, and then
change the setting.
To adjust the clock
1 Press CLOCK/TIMER SET on the remote.
2 Press MENU + or – on the remote repeatedly
until “CLOCK SET?” appears in the display,
and then press ENTER/YES on the remote.
3 Do the same procedures as steps 3 to 5
above.

10
HCD-L7HD SECTION 3
DISASSEMBLY
Note : This set can be disassembled in the order shown below.
TOUCH SW BOARD,
SWITCH BOARD
LED BOARD (L)
INDICATOR (BS),
LED BOARD (R)
BD BOARD
CD MECHANISM
(CDM71B)
FL
BOARD
CD BOARD
FRONT PANEL SECTION
POWER BOARD,
AM/FM TUNER
HDD BOARD,
HDD SUB BOARD COVER (HDD-TOP), COVER (HDD-BOTTOM)
BOTTOM PLATE,CASE
AMP BOARD,
REG BOARD SWITCHING REGULATOR
SET (HCD-L7HD)
MAIN BOARD
HOLDER ASSY,
SLED MOTOR ASSY (M102)
C.MOTOR BOARD,
L.SENSOR BOARD
BASE UNIT
(BU-31BD63)
PULLEY (RTR) ASSY,PULLEY (RTL) ASSY,
BELT (CDM71), BELT (ROLLER) (L) PULLEY (SPT) ASSY,GEAR (RT)ASSY, GEAR (KT), BELT (CDM71)
L.MOTOR BOARD ENCODER BOARD,
D.SENSOR BOARD

11
HCD-L7HD
Note : Follow the disassembly procedure in the numerical order given.
3-1. Bottom Plate,Case
3-2. Front Panel Section
1 six screws (+BVTP 3 × 8 )
2 three screws (+BVTP 2.6 × 8)
7 s crew (+PTT 3 × 6 )
9 s crew (+PTT 3 × 6 )
5 f our screws (SS)
6 t wo screws (SS)
q; t wo screws (+PTT 3 × 6 )
qa t wo screws
(+PTT 3 × 6 )
8 t wo screws (SS)
4 b ottom plate
qd three claws
qg case
qs
qf
c onnector
(CN801)
3 earth plate
6 two screws (+BVTP 2.6 × 8)
1 two earth plates
4 c onnector (CN1201)
8 c onnector
(CN1321)
7 flat type wire (17 core)
9 f lat type wire (13 core)
q; c hassis section
qa front panel section
5 t wo screws (+BVTP 2.6 × 8)
2 screw (+BVTP 3 × 6)
3 ground wir
e

12
HCD-L7HD
3-3. POWER Board, AM/FMTuner
3-4. HDD Board, HDD SUB Board
7 POWER board
2 connector (CN500)
9 flat type wire
(11core or 15core)
q; AM/FM t uner
3 connector (CN800)
4 connector (CN851)
5 connector (CN852)
1 two screws
(+BVTP 3
× 8)
8 two screws
(+BVTP 3
× 8)
6 connector (CN803
)
3 connector
(CN507,508,503)
2 four screws
(+BVTP 3 × 8
)
1 screw
(+BVTP 3 × 8)
4 two screws
(+BVTP 3 × 8)
7 three screws
(+BVTT 3 × 6)
6 HDD IF board
8 HDD SUB board
5 harness
(CN1002)

13
HCD-L7HD
3-5. MAIN Board
3-6. Cover (HDD-Top), Cover (HDD-Bottom)
9 MAIN board
4 POWER board
7
6
three screws
(+BVTP 3
× 8)
1 connector (CN504)
8 two claws
2 t wo screws (+BVTP 3 × 8
)
5 flat type wire (23core)
3 connector (CN500)
6 four screws
(+BVTP 3
× 8)
5 shield case (HDD)
q; cover (HDD-bottom)
2 two insulators
4 two insulators
9 HDD
7 cover (HDD-top)
8 four screws
(+BVTT 3
× 6
)
1 two screws
(+BVTPWH M3)
3 two screws
(+BVTPWH M3)

14
HCD-L7HD
3-7. AMP Board, REG Board
3-8. Switching Regulator
1 connector (CN851)
2 connector (CN800)
qd connector (CN804)
qg AMP board
qj REG board
qf shield case
(SM-bottom)
8 shield case (SM-top)
6 three screws
(+BVTP 3 × 8)
4 two screws
(+BVTP 3 × 8)
q; three screws
(+BVTP 3
× 6 )
qh screw
(+BVTP 3 × 8)
9 connector (CN300)
qa two hooks
3 flat type wire (23core)
qs
7 ground wire
5 screw
(+BVTP 3 × 8
)
6 screw
(+BVTP 3
× 8)
q; switching regurator
5 screw
(+BVTP 3
× 8)
7 two screws
(+BVTP 3
× 8)
8 nylon rivet
9 sheet (power box)
3 two hooks
4 connector
1 four screws
(+BVTP 3
× 6)
2

15
HCD-L7HD
3-9. Indicator (BS), LED Board (R)
3-10. LED Board (L)
9 screw (+BVTP 2.6 × 8)
7 holder (LED-R)
8 indicator (BS)
3 ornamental plate (CD)
5 connecto
r
(CN1303)
6 s crew (+BTP 2.6 × 6)
1 two screws
(panel)
2 two screws
(panel)
q; LED board (R)
4 sheet (CD2)
5 screw (+BVTP 2.6 × 8)
4 holder (LED-L)
1 connector (CN1302)
3 screw (+BTP 2.6 × 6)
6 LED board (L)
2 sheet (CD2)

16
HCD-L7HD
3-11. FL Board
3-12. TOUCH SW Board, SWITCH Board
1 t wo screws (+BVTP 2.6 × 8
)
2 FL board
2 TOUCH SW board
7 SWITCH boar
d
3 c onnector (CN1302)
4 c onnector (CN1303)
5 knob jog assy
6 f ive screws
(+BVTP 2.6 × 8)
1 t wo screws
(+BVTP 2.6 × 8)

17
HCD-L7HD
3-13. CD Board
3-14. BD Board
3 c onnector
(CN752)
4 c onnector
(CN751)
2 three screws
(+BVTP 2.6
× 8
)
1 f lat type wire (19 core)
6 two screws (+BVTP 3 × 8)
5 CD board
7 bracket (CD-MT)
6 BD board
3 screw
(+BTP 2.6
× 8
)
(BLK)
(RED)
1 Remove solder (two portions ).
2 Remove solder (two portions ).
5 h ook
4 flxible board

18
HCD-L7HD
3-15. Base Unit (BU-31BD63)
3-16. BU-31 Assy, Sled Motor Assy (M102)
(BLK)
9 two screws
(+PTPWH M2.6)
8 screw
(+PTPWH M2.6)
qs screw
(+P 2 × 3)
qd sled motor assy (M102)
q; h ook
qa BU-31 assy
holder assy
6 coil spring (B) (holder)
7 coil spring (C) (holder)
5 BD board
1 Remove solder
(two portions ).
2 Remove solder
(two portions ).
4 flxible board
(RED)
3 screw
(+BTP 2.6 × 8)
5 base unit
(BU-31BD63
)
2 screw
(+PTPWH M2.6)
cam (A)
shaft
1
4
3
shaft
Rotate the SPT pulley assy in the direction of to move the base unit shaft
forward.
SPT pulley assy
1

19
HCD-L7HD
3-17. CD Mechanism (CDM71B)
3-18. L.MOTOR Board
5 t wo screws
(+BVTP 2.6
× 8)
7 blacket
6 six screws (+BTP 2.6 × 6)
8 CD mechanism (CDM71B)
4 t wo screws
(+BVTP 2.6
× 8)
3 sheet
1 two claws
2 cap (chuck) assy
2 two screws
(+BTP 2.6 × 6 )
4 L.MOTOR board
3 connector
(CN711)
1 Remove solder (two portions ).

20
HCD-L7HD
3-19. C.MOTOR Board, L.SENSOR Board
2 two screws
(+BTP M 2.6
× 6
)
8 screw
(+BTP M 2.6 × 6)
7 C . MOTOR board
1 Remove solder
(two portions ).
6 c onnector
(CN755)
5 c onnector
(CN753)
4 c onnector
(CN754)
3 connector
(CN711)
9 L.SENSOR board (R)