Sony CMT-C7NT / HCD-C7NT Service Manual ▷ View online
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.
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.
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.
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.
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.
checking it for adjustment. It is feared that you will lose your sight.
This caution
label is
located inside
the unit.
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.
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.
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.
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.
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)
(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.
to be performed are shown as follows.
I+3V : For measuring Iop (Check the deterioration of the optical pick-up laser)
Iop
Iop
: For measuring Iop (Check the deterioration of the optical pick-up laser)
GND : Ground
TE
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.
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,
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)
52)
MD Z 6 (15, 19, 29, 53)
NET MD 7 (53)
REC/REC IT 9 (20, 21, 25, 26,
NET MD 7 (53)
REC/REC IT 9 (20, 21, 25, 26,
28, 50, 60)
Remote sensor 0
TUNING +/– 5 (42)
VOL +/– qa (46)
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)
