CMT-C7NT, HCD-C7NT - Sony Audio Service Manual (repair manual)

Model
CMT-C7NT HCD-C7NT
Pages
106
Size
11.97 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-c7nt-hcd-c7nt.pdf
Date

View Sony CMT-C7NT / HCD-C7NT Service Manual online

HCD-C7NT
SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
AEP Model
UK Model
E Model
MICRO HI-FI COMPONENT SYSTEM
9-873-685-04
2009L05-1
© 2009.12
SPECIFICATIONS
Ver. 1.3  2009.12
HCD-C7NT is the Amplifier, CD player,
MD Deck and Tuner section in CMT-C7NT.
Model Name Using Similar Mechanism
HCD-C5
CD Mechanism Type
TN-CCD1001Z
Base Unit Name
TT BASE ASSY
Optical Pick-up Name
OPTIMA-720L1E
Model Name Using Similar Mechanism
New
MD Mechanism Type
MDM-7X2B
Optical Pick-up Name
KMS-262E
CD
 Section
MD
 Section
Amplifier section
European model:
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
45 + 45 W
Other models:
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
TAPE IN (stereo minijack):
Sensitivity 250 mV,
impedance 47 kilohms
DIGITAL OPTICAL IN (Supported sampling
frequencies: 32 kHz, 44.1 kHz and 48 kHz)
Outputs
TAPE OUT (stereo minijack):
Sensitivity 250 mV,
impedance 1 kilohm
PHONES (stereo minijack):
Accepts headphones with
an impedance of  8 ohms
or more
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(
λ
 = 780 nm)
Emission
duration: continuous
Frequency response
2 Hz – 20 kHz
MD deck section
System
MiniDisc digital audio
system
Laser
Semiconductor laser
(
λ
=780 nm)
Emission duration:
continuous
Sampling frequency
44.1 kHz
Frequency response
5 Hz – 20 kHz
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
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
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
General
Power requirements
European  model:
230 V AC, 50/60 Hz
Other models:
220 V AC , 50/60 Hz
Power consumption
European model:
See the nameplate
0.5 W (at the power
saving mode)
Other models:
See the nameplate
Dimensions (w/h/d)
Approx. 145 
×
 125 
×
273 mm incl. projecting
parts and controls
Mass
Approx. 4.5 kg
Supplied accessories
Remote commander (1)
FM wire antenna (1)
AM loop antenna (1)
USB cable (1)
Operating Instructions (1)
M-crew for CMT-C7NT/
OpenMG Jukebox for Net
MD CD-ROM (1)
M-crew Operating
Instructions (1)
OpenMG Jukebox for Net
MD Operating
Instructions (1)
Warranty (1)
Design and specifications are subject to change
without notice.
HCD-C7NT
2
HCD-C7NT
SELF-DIAGNOSIS  FUNCTION
The self-diagnosis function consists of error codes for customers, which are displayed automatically when errors occur,
and error codes, which show the error history in the test mode during servicing. For details on how to view error codes
for the customer, refer to the following box in the instruction manual. For details on how to check error codes during
servicing, refer to the following “Procedure for using the Self-Diagnosis Function (Error History Display Mode)”.
Self-diagnosis display
This system has a Self-diagnosis display
function to let you know if there is a system
malfunction. The display shows a code made
up of 3 or 5 letters and a message alternately to
show you the problem. To solve the problem
refer to the following list. If any problem
persists, consult your nearest Sony dealer.
C11/Protected
The MD is protected against erasure.
cRemove the MD and slide the tab to close the
slot (see page 19).
C12/Cannot Copy
You tried to record a CD or MD with a format that
the system does not support, such as a CD-ROM.
cRemove the disc and turn off the system once,
then turn it on again.
C13/REC Error
Recording could not be performed properly.
cMove the system to a stable place, and start
recording over from the beginning.
The MD is dirty or scratched, or the MD does not
meet the standards.
cReplace the MD and start recording over from
the beginning.
C13/Read Error
The MD deck cannot read the disc information
properly.
cRemove the MD once, then load it again.
C14/Toc Error
The MD deck cannot read the disc information
properly.
c Replace the MD.
Erase all the recorded contents of the MD using
All Erase Function (see page 35).
C41/Cannot Copy
The sound source is a copy of a commercially
available music software, or you tried to record a
CD-R (Recordable CD) or CD-RW (ReWritable
CD).
c The Serial Copy Management System prevents
making a digital copy (see page 57). You cannot
record a CD-R or CD-RW.
C71/Check OPT-IN
This appears momentarily because of the signal of
the digital broadcast during recording.
c There is no affect on the recorded contents.
No component is connected to the DIGITAL
OPTICAL IN jack, or a digital component is not
connected properly.
c Connect a digital component to the DIGITAL
OPTICAL IN jack properly using a digital
connecting cable (not supplied, see page 49).
The connected digital component is not turned on.
c See the operating instructions supplied with the
connected component and confirm whether the
component is turned on.
The digital connecting cable connected to the
DIGITAL OPTICAL IN jack is pulled out, or the
connected digital component is turned off during
digital recording.
c Connect the cable, or turn on the digital
component.
E0001/MEMORY NG
There is an error in the internal data that the system
needs in order to operate.
c Consult your nearest Sony dealer.
E0101/LASER NG
There is a problem with the optical pickup.
c The optical pickup may have failed. Consult your
nearest Sony dealer.
3
HCD-C7NT
TABLE  OF  CONTENTS
SELF-DIAGNOSIS FUNCTION
.....................................
2
1.
SERVICING  NOTES
...............................................
4
2.
GENERAL
...................................................................
7
3.
DISASSEMBLY
.........................................................
9
4.
TEST MODE
............................................................... 24
5.
ELECTRICAL ADJUSTMENTS
CD Section ...................................................................... 33
MD Section ..................................................................... 34
6.
DIAGRAMS
6-1. Note For Printed Wiring Boards and
Schematic Diagrams ....................................................... 45
– Wave forms ................................................................... 45
– Circuit Boards Location ............................................... 45
6-2. Block Diagram – CD Servo Section – ............................ 46
6-3. Block Diagram – MD Servo Section – ........................... 47
6-4. Block Diagram – Main Section – ................................... 48
6-5. Block Diagram – USB section – ..................................... 49
6-6. Printed Wiring Boards – BD (CD) Board – ................... 50
6-7. Schematic Diagram – BD (CD) Board – ........................ 51
6-8. Printed Wiring Boards – Connector  Section – .............. 52
6-9. Schematic Diagram – Connector Section – .................... 53
6-10. Printed Wiring Board – BD (MD) Board – .................... 54
6-11. Schematic Diagram – BD (MD) Board (1/2) – .............. 55
6-12. Schematic Diagram – BD (MD) Board (2/2) – .............. 56
6-13. Printed Wiring Board – MD DIGITAL Board – ............ 57
6-14. Schematic Diagram – MD DIGITAL Board (1/3) – ...... 58
6-15. Schematic Diagram – MD DIGITAL Board (2/3) – ...... 59
6-16. Schematic Diagram – MD DIGITAL Board (3/3) – ...... 60
6-17. Printed Wiring Board – UCOM Board – ........................ 61
6-18. Schematic Diagram – UCOM Board – ........................... 62
6-19. Printed Wiring Boards – Audio Section – ...................... 63
6-20. Schematic Diagram – Audio Section – ........................... 64
6-21. Printed Wiring Board – PANEL Board – ....................... 65
6-22. Schematic Diagram – PANEL Board – .......................... 66
6-23. Printed Wiring Boards – Power Section – ...................... 67
6-24. Schematic Diagram – Power Section – .......................... 68
6-25. IC Block Diagrams ......................................................... 69
6-26. IC Pin Function Description ........................................... 74
7.
EXPLODED  VIEWS
................................................ 82
8.
ELECTRICAL  PARTS  LIST
............................... 92
4
HCD-C7NT
SECTION 1
SERVICING NOTE
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the bottom
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
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
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
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.
FOR CD
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.
FOR MD
NOTES  ON  LASER  DIODE  EMISSION  CHECK
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
This caution
label is
located inside
the unit.
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.
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
 rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
5
HCD-C7NT
SERVICE POSITION OF THE CD MECHANISM DECK
SERVICE POSITION OF THE MD MECHANISM DECK
STAND
BD (CD) BOARD
UCOM BOARD
CD MECHANISM DECK
(TN-CCD1001Z)
CN101
CN204
BD (MD) BOARD
PANEL BOARD
AUDIO BOARD
MD DIGITAL BOARD
MD MECHANISM (MDM-7X2B)
UCOM BOARD
BD (CD) BOARD
CN102
CN203
CN204
CN101
CN201
CN601
CN222
CN1002
CN1003
CN1001
CN102
CN103
CN1004
CN1005
6
HCD-C7NT
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. The names of terminals and the checking items
to be performed are shown as follows.
I+3V : For measuring Iop (Check the deterioration of the optical pick-up laser)
Iop
: For measuring Iop (Check the deterioration of the optical pick-up laser)
GND : Ground
TE
: Tracking error signal (Traverse adjustment)
FE
: Focus error signal
VC
: Reference level for checking the signal
RF
: RF signal (Check jitter)
I+3V
CN105
Iop 
TE
VC
GND
FE
RF
I+3V
Iop 
GND
TE
FE
VC
RF
I+3V
Iop 
GND
TE
FE
VC
RF
1
7
for MDM-7X2B
7
HCD-C7NT
SECTION  2
GENERAL
This section is extracted
from instruction manual.
4
Main unit
1
2
3
4
5
6
7
9 8
qs
0
qa
CD SYNC HIGH 8 (19, 60)
CD SYNC NORMAL 9 (19)
CD Z 2 (10, 60)
FUNCTION qs (9, 11, 13, 14, 16,
17, 19, 21–24, 26, 30–43, 50,
52)
MD Z 6 (15, 19, 29, 53)
NET MD 7 (53)
REC/REC IT 9 (20, 21, 25, 26,
28, 50, 60)
Remote sensor 0
TUNING +/– 5 (42)
VOL +/– qa (46)
BUTTON DESCRIPTIONS
? 1
/
 (power) 1 (7, 19, 29, 43, 46,
48, 53)
u 3 (9–11, 14–16, 19–21, 26,
28, 51)
x 4 (10, 11, 15, 16, 20–22, 26,
28, 51)
.>
 
 5 (10, 11, 13, 15–17,
22–26, 30–41, 46–48)
m M 5 (10, 15, 36)
8
HCD-C7NT
5
Remote control
1 2
4
3
5
6
7
qa
qs
qd
qf
qg
qjqh
qlqk
w;
wa
ws
wd
wf
wg
wh
wj
wk
8
9
0
CD x qh (10, 11)
CD X ws (10)
CD N wd (9, 11, 21)
CLEAR 9 (11, 13, 16, 30, 44)
CLOCK/TIMER SELECT 6
(47, 48)
CLOCK/TIMER SET 7 (8, 46,
47)
CURSOR T/t wh (8, 13, 30)
DBFB qf (45)
DISPLAY wk (8, 12, 17, 44)
ENTER/YES 8 (8, 11, 13, 14,
16, 21–26, 29–42, 44, 46, 47)
FM MODE qj (43)
FUNCTION w; (9, 11, 13, 14, 16,
17, 19, 21–24, 26, 30–43, 50,
52)
GROUP ON/OFF wf (17, 27, 28,
30–34)
GROUP SKIP qs (17, 28, 31–33)
Letter/Number buttons wj (10,
13, 15, 30, 43)
MD x qh (15, 16, 20–22, 26, 28,
51)
MD X ws (15, 26)
MD N wg (14, 16, 17, 19, 20)
MENU/NO q;
3
 (13, 14, 22–26,
29, 31–42)
NAME EDIT/SELECT 
 (13,
29–31, 44)
PLAY MODE qk (9, 11, 13, 14,
16, 29, 40, 41)
PRESET EQ qg (45)
REPEAT qj (10, 15)
SCROLL 5 (12, 14, 18, 31)
SLEEP 1 (45)
TIME 2 (8, 11, 12, 16, 17)
TUNER BAND wa (42, 43)
TUNING MODE qk (42, 43)
TUNING +/– ql (42, 43)
VOL +/– qd (46)
BUTTON DESCRIPTIONS
? 1
/  (power) 4 (7, 19, 29, 43, 46,
48, 53)
. >
  
 qa (8, 10, 11, 13–17,
22–26, 30–41, 46–48)
–/+ qa (8, 46, 48)
m M
  
 wh (10, 15, 36, 38)
Setting the time
1
Turn on the system.
2
Press CLOCK/TIMER SET on the
remote.
If you are setting the clock for the first time,
go to step 5.
3
Press – or + (
.
 or 
>
) on the
remote repeatedly until “CLOCK SET?”
appears in the display.
4
Press ENTER/YES on the remote.
The day indication flashes.
5
Press – or + (
.
 or 
>
) on the
remote repeatedly to set the day, and
then press ENTER/YES or CURSOR
t
on the remote.
The hour indication flashes.
6
Press – or + (
.
 or 
>
) on the
remote to set the hour, and then press
ENTER/YES or CURSOR
t
 on the
remote.
The minute indication flashes.
7
Press – or + (
.
 or 
>
) on the
remote repeatedly to set the minute,
and then press ENTER/YES on the
remote.
If you made a mistake
Press TCURSOR or CURSORt on the
remote until the indication you wish to change
(day, hour, minute) flashes, and then change
the setting.
To reset the time
Start over from step 1.
9
HCD-C7NT
SECTION  3
DISASSEMBLY
• This set can be disassembled in the order shown below.
• The dotted square with arrow (           
) prompts you to move to the next job when all of the works within the dotted square (          ) are
completed.
BOTTOM PLATE, CASE
(Page 10)
JACK BOARD, HP BOARD, 
REAR COVER
(Page 18)
OVER WRITE HEAD (HR901)
(Page 23)
SET
LOADING MOTOR (M703),
SPINDLE MOTOR (M701),
SLED MOTOR (M702)
(Page 22)
PANEL BOARD
(Page 10)
UCOM BOARD,
AMP POWER BOARD
(Page 19)
AUDIO BOARD,
POWER BOARD,
POWER TRANSFORMER
(T900) (1)
(Page 20)
CD MECHANISM DECK 
(TN-CCD1001Z),
BD (CD) BOARD
(Page 11)
AUDIO BOARD,
POWER BOARD,
POWER TRANSFORMER
(T900) (2)
(Page 20)
MD MECHANISM DECK
(MDM-7X2B),
MD DIGITAL BOARD
(Page 21)
CONNECTOR BOARD
(Page 12)
FEED MOTOR ASSY (M903)
(Page 15)
REAR DAMPER BRACKET
(Page 15)
SW BOARD
(Page 14)
FRONT BRACKET SECTION,
LOADING MOTOR ASSY
(M902)
(Page 13)
SPINDLE MOTOR ASSY
(M904)
(Page 18)
BASE SECTION
(Page 17)
OPTICAL PICK-UP
(OPTIMA-720L1E),
SCREW GUIDE,
FEED SCREW ASSY, etc.
(Page 16)
OPTICAL PICK-UP
(OPTIMA-720L1E)
(Page 16)
HOLDER ASSY
(Page 21)
OPTICAL PICK-UP
(KMS-262E)
(Page 23)
BD (MD) BOARD
(Page 22)
TUNER PACK,
D. C. FAN (M901)
(Page 19)
10
HCD-C7NT
Note:
 Follow the disassembly procedure in the numerical order given.
3-1. Bottom Plate, Case
3-2. Panel Board
2
 three screws
    (+BVTT 3 x 5)
1
 four screws
    (+BVTT 3 x 5)
5
 claw
6
 case
3
 bottom plate
A
A
4
 screw
    (+BVTT 3 x 5)
5
 six screws
(+B 2 x 6)
8
 PANEL board
7
 front panel section
6
 two claws
3
 screw (+K 3 x 6)
2
 screw
    (+K 3 x 6)
1
 two screws
    (+BVTT 3 x 5)
4
 wire (flat type)
    (16 core) (CN201)

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