Read Sony ZS-YN7 Service Manual online
SERVICE MANUAL
PERSONAL AUDIO SYSTEM
US Model
Canadian Model
E Model
Australian Model
ZS-YN7
Ver. 1.1 2005.09
9-877-962-02
2005I05-1
© 2005.09
© 2005.09
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
Published by Sony Engineering Corporation
Model Name Using Similar Mechanism
NEW
Optical Pick-up Block Name
KSM-213RAP
Optical Pick-up Name
KSS-213R
SPECIFICATIONS
US and foreign patents licensed from Dolby Laboratories.
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION
With 3.2-ohm loads, both channels driven from
100 - 10,000 Hz; rated 1.7 W per channel-
minimum RMS power, with no more than 10 %
total harmonic distortion in AC operation.
DISTORTION
With 3.2-ohm loads, both channels driven from
100 - 10,000 Hz; rated 1.7 W per channel-
minimum RMS power, with no more than 10 %
total harmonic distortion in AC operation.
Other Specifications
CD player section
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wave length: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6
Wave length: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6
µW
(This output is the value measured at a distance of about
200 mm from the objective lens surface on the optical
pick-up block with 7 mm aperture.)
200 mm from the objective lens surface on the optical
pick-up block with 7 mm aperture.)
Spindle speed
400 r/min (rpm) to 1 000 r/min (rpm) (CLV)
Number of channels
2
Frequency response
20 - 20 000 Hz +0/–1 dB
Wow and flutter
Below measurable limit
Radio section
Frequency range
FM: 87.5 - 108 MHz
AM: 531 - 1 611 kHz (9 kHz step)
AM: 531 - 1 611 kHz (9 kHz step)
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
AM: Built-in ferrite bar antenna
General
Speaker
Full range: 8 cm (3
1
⁄
4
in.) dia.,
3.2
Ω, cone type (2)
Output
Headphones jack (stereo minijack):
For 16 - 64
For 16 - 64
Ω impedance headphones
Power output
2.3 W + 2.3 W (at 3.2
Ω, 10 % harmonic
distortion)
Power requirements
For player
120 V AC, 60 Hz
9 V DC, 6 size C (R14) batteries
For remote control:
3 V DC, 2 size AAA (R03) batteries
For remote control:
3 V DC, 2 size AAA (R03) batteries
Power consumption
16 W
Battery life
For player:
CD playback
Sony R14P: approx. 1.5 h
Sony alkaline LR14: approx. 8 h
Radio reception
Sony R14P: approx. 6 h
Sony alkaline LR14: approx. 20 h
Dimensions
Approx. 455
× 214 × 180 mm (w/h/d)
(18
×
8
1
⁄
2
×
7
1
⁄
8
inches)
(incl. projecting parts)
Mass
Approx. 3.5 kg (7 lb. 11 oz) (incl. batteries)
Supplied accessories
AC power cord (1) (US, Canadian, E and Mexican models)
Remote control (1)
CD-ROM (SonicStage) (1)
SonicStage Installation/Operating Guide (1)
CD-ROM (SonicStage) (1)
SonicStage Installation/Operating Guide (1)
Design and specifications are subject to change without
notice.
notice.
(US model only)
IF
FM: 10.7 MHz
AM: 450 kHz
AM: 450 kHz
530 - 1 610 kHz (10 kHz step)
US, Canadian, E and Mexican models:
Korean model: 220 V AC, 60 Hz
Singapore and Australian model: 230 V AC, 50 Hz
Singapore and Australian model: 230 V AC, 50 Hz
Mains lead (1) (Singapore, Korean and Australian models)
ZS-YN7
2
TABLE OF CONTENTS
1.
SERVICING NOTES
................................................
3
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
7
3-2.
Cabinet Rear Assy ...........................................................
8
3-3.
Cabinet (Upper) ...............................................................
8
3-4.
Shassis Section ................................................................
9
3-5.
CD Block Section ............................................................
9
3-6.
LCD Board ...................................................................... 10
4.
TEST MODE
.............................................................. 11
5.
ELECTRICAL ADJUSTMENTS
TUNER Section ............................................................... 12
CD Section ...................................................................... 14
CD Section ...................................................................... 14
6.
DIAGRAMS
6-1.
Block Diagram – CD SERVO Section – ........................ 16
6-2.
Block Diagram – TUNER Section – .............................. 17
6-3.
Block Diagram – MAIN Section – ................................. 18
6-4.
Printed Wiring Board – CD Board – .............................. 20
6-5.
Schematic Diagram – CD Board – ................................. 21
6-6.
Printed Wiring Board – TU Board – ............................... 22
6-7.
Schematic Diagram – TU Board – ................................. 23
6-8.
Printed Wiring Board
– MAIN Board (Component Side) – ............................... 24
– MAIN Board (Component Side) – ............................... 24
6-9.
Printed Wiring Board
– MAIN Board (Conductor Side) – ................................. 25
– MAIN Board (Conductor Side) – ................................. 25
6-10. Schematic Diagram – MAIN Board (1/2) – ................... 26
6-11. Schematic Diagram – MAIN Board (2/2) – ................... 27
6-12. Printed Wiring Boards – KEY Section – ........................ 28
6-13. Printed Wiring Boards – POWER Section – .................. 29
6-14. Schematic Diagram – KEY/POWER Section – ............. 30
6-11. Schematic Diagram – MAIN Board (2/2) – ................... 27
6-12. Printed Wiring Boards – KEY Section – ........................ 28
6-13. Printed Wiring Boards – POWER Section – .................. 29
6-14. Schematic Diagram – KEY/POWER Section – ............. 30
7.
EXPLODED VIEWS
7-1.
Cabinet Rear Section ....................................................... 42
7-2.
Cabinet Front Section ...................................................... 43
7-3.
Chassis Section ................................................................ 44
7-4.
LID CD Section ............................................................... 45
7-5.
Optical Pick-up Block Section (KSM-213RAP) ............. 46
8.
ELECTRICAL PARTS LIST
................................ 47
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 the 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.
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.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
About CD-Rs/CD-RWs
This player can play CD-Rs/CD-RWs
recorded in the CD-DA format*, but
playback capability may vary depending on
the quality of the disc and the condition of
the recording device.
recorded in the CD-DA format*, but
playback capability may vary depending on
the quality of the disc and the condition of
the recording device.
* CD-DA is the abbreviation for Compact
Disc Digital Audio. It is a recording
standard used for Audio CDs.
standard used for Audio CDs.
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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check 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.
safety check 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 TEST
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.
instruments.
2. A battery-operated AC 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-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 2 V AC range are suitable. (See
Fig. A)
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 2 V AC range are suitable. (See
Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
3
ZS-YN7
SECTION 1
SERVICING NOTES
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.
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
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 viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
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 HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S421. (push switch type)
The following checking method for the laser diode is operable.
•
diode is prohibited unless the upper lid is closed while turning ON
the S421. (push switch type)
The following checking method for the laser diode is operable.
•
Method
Emission of the laser diode is visually checked.
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S421 as shown in Fig.1.
2. Push the S421 as shown in Fig.1.
Note:
Do not push the detection lever strongly, or it may be bent or damaged.
3. Press the
u
button.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
Fig.1 Method to push the S421
2
1
S421
4
ZS-YN7
MAIN board
H/P board
TU board
HARNESS SETTING
