Sony DNS-921-F Service manual

D-NS921F

SERVICE MANUAL

Ver 1.1 2003. 11

Photo : US model

SPECIFICATIONS

CD player

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs
Wavelength: λ = 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW
(This output is the value measured at a distance
of 200 mm from the objective lens surface on
the optical pick-up block with 7 mm aperture.)

D-A conversion

1-bit quartz time-axis control

Frequency response

20 - 20 000 Hz

307)

Output (at 4.5 V input level)

Headphones (stereo minijack)

Approx.5 mW + Approx. 5 mW at 16 Ω

Radio

Frequency range (STEP switch)

•US model
9 kHz step:

TV: 2 - 13 ch
WB (weather band): 1 - 7 ch
FM: 87.5 - 108.0 MHz
AM: 531 - 1 710 kHz

+1–2

dB (measured by JEITA CP-

10 kHz step:

TV: 2 - 13 ch
WB (weather band): 1 - 7 ch
FM: 87.5 - 108.0 MHz
AM: 530 - 1710 kHz

• Canadian model
9 kHz step:

FM: 87.5 - 108.0 MHz
AM: 531 - 1710 kHz

10 kHz step:

FM: 87.5 - 108.0 MHz
AM: 530 - 1710 kHz

•Other models
FM: 87.5 - 108.0 MHz
AM: 531 - 1602 kHz

Antenna

*(TV/WB/)FM:Headphones/earphones cord

antenna
AM: Built-in ferrite bar antenna
*US model only

General

Power requirements

For the area code of the model you
purchased, check the upper left side of the
bar code on the package.

US Model

Canadian Model

AEP Model

UK Model

Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM-3325ER2
Optical Pick-up Type DAX-25E

• Sony NH-WM2AA rechargeable batteries:

1.2 V DC × 2

•Two LR6 (size AA) batteries: 1.5 V DC × 2

•AC power adaptor (DC IN 4.5 V jack):
US and CND
AEP

UK model: 230 V, 50 Hz

Battery life*1 (approx. hours)

(When you use the CD player on a flat and stable
surface)
Playing time varies depending on how the CD
player is used.

When using two Sony alkaline batteries
LR6 (SG) (produced in Japan)

Audio CD 48 43
ATRAC3plus files*
MP3 files*
RADIO ON 62

*1 Measured value by the standard of JEITA

(Japan Electronics and Information Technology

Industries Association)
*2 When recorded at 48 kbps or 64 kbps
*3 When recorded at 128 kbps

models: 120 V, 60 Hz

model: 220 - 230 V, 50/60 Hz

G-PROTECTION function

“1” “2”

2

3

— Continued on next page —

75 75
70 70

9-877-307-02

2003K16-1
© 2003.11

TV/WB/FM/AM PORTABLE CD PLAYER

US model

FM/AM PORTABLE CD PLAYER

EXCEPT US model

Sony Corporation

Personal Audio Company
Published by Sony Engineering Corporation

D-NS921F

Operating temperature

5°C - 35°C (41°F - 95°F)

Dimensions (w/h/d) (excluding
projecting parts and controls)

Approx. 148.4 × 134.0 × 36.7 mm

7

(5

⁄8 × 5 3⁄8 × 1 1⁄2 in.)

Mass (excluding accessories)

Approx. 345 g (12.2 oz.)

Supplied accessories

For the area code of the location in which you
purchased the CD player, check the upper left side
of the bar code on the package.

AC power adaptor (1)

Hand strap (1)
CD-ROM (SonicStage Simple Burner) (1)
User’s guide for SonicStage Simple Burner (1)

For US customers

The AC power adaptor supplied is not intended to
be serviced.

functionin its intended manner, during the warranty

period, the adaptor should be returned to your nearest

Sony Service Center or Sony Authorized Repair Center

for replacement, or after warranty period, it should be
discarded.

Design and specifications are subject to change
without notice.

Should the AC power adaptor cease to

Unleaded solder

Boards requiring use of unleaded solder are printed with the lead­free 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.

DANGER

Invisible laser radiation when open and interlock failed or defeated.
Avoid direct exposure to beam.

CAUTION

Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
exposure.

Laser component in this product is capable of emitting
radiation exceeding the limit for Class 1.

This Compact Disc player is
classified as a CLASS 1 LASER
product.
The CLASS 1 LASER
PRODUCT label is located on
the rear exterior.

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.

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.

On AC power adaptor

• Use only the AC power adaptor supplied or

recommended in “Accessories (supplied/
optional).” Do not use any other AC power
adaptor. It may cause a malfunction.

Polarity of the plug

•When disconnecting the AC power adaptor

from the AC outlet, grasp the adaptor
itself. Do not pull it by the cord.

• Do not touch the AC power adaptor with

wet hands.

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 .

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMA TIQUES 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.

À LA SÉCURITÉ!

2

TABLE OF CONTENTS

D-NS921F

SECTION 1

SERVICING NOTES

1. SERVICING NOTES ······················································· 3

2. GENERAL ·········································································· 4

3. DISASSEMBLY ································································ 6

3-1. Front Cabinet, Upper Lid Assy ····································· 6
3-2. MD Assy (CDM-3325ER2), MAIN Board ··················· 7
3-3. Turn Table Motor Assy (Spindle)(M902)······················ 7
3-4. Motor Assy (Sled)(M901),

Optical Pick-up (DAX-25E)·········································· 8

3-5. SWITCH UNIT MAIN Board, Hold Lever ·················· 8

4. ELECTRICAL ADJUSTMENTS ································· 9

5. DIAGRAMS······································································ 11

5-1. Block Diagrams – MAIN Section – ···························· 12

– TUNER Section –····················································· 13
5-2. Printed Wiring Board – MAIN Board (Side A) –······· 14
5-3. Printed Wiring Board – MAIN Board (Side B) –······· 15
5-4. Schematic Diagram – MAIN Board (1/6) – ··············· 16
5-5. Schematic Diagram – MAIN Board (2/6) – ··············· 17
5-6. Schematic Diagram – MAIN Board (3/6) – ··············· 18
5-7. Schematic Diagram – MAIN Board (4/6) – ··············· 19
5-8. Schematic Diagram – MAIN Board (5/6) – ··············· 20
5-9. Schematic Diagram – MAIN Board (6/6) – ··············· 21
5-10.Printed Wiring Board

– SWITCH UNIT MAIN Board –······························· 22
5-11.Schematic Diagram

– SWITCH UNIT MAIN Board –······························· 23
5-12.IC Block Diagrams ······················································24
5-13.IC Pin Function Descriptions ······································ 26

6. EXPLODED VIEWS ······················································ 33

6-1. Upper Lid Section ······················································· 33
6-2. Cabinet Section ··························································· 34
6-3. Cabinet Lower Section ················································ 35
6-4. Optical pick-up Section (CDM-3325ER2) ··················36

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR
BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the charged
electrostatic load, etc. on clothing and the human body. During repair, pay
attention to electrostatic breakdown 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 objecti ve lens in the optical pick-up block. Therefore,
when checking the laser diode emission, observe from more than 30cm away
from the objective lens.

Before Replacing the Optical pick-up Block

Please be sure to check thoroughly the parameters as per the “Optical pick­up Block Checking Procedure” (Part No. : 9-960-027-11) issued separately
before replacing the optical Pick-up block.
Note and specifications required to check are given below.

• FOK output : IC601 yg pin (TP601)
When checking FOK, remove the lead wire to disc motor.

• RF signal P-to-P value : 0.45 to 0.65Vp-p

Laser Diode Checking Methods

During normal operation of the equipment, emission of the laser diode is
prohibited unless the upper panel is closed while turning ON the S801 (push
switch type).
The following two checking methods for the laser diode are operable.

Method :
Emission of the laser diode is visually checked.

1. Open the upper lid.

2. Push the S801 as shown in Fig. 1 .

3. 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. During normal operation, the laser diode is turned
ON about 2.5 seconds for focus searching.

7. ELECTRICAL PARTS LIST ······································· 37

S801

Fig. 1 Method to push the S801

3

D-NS921F

Locating The Controls

CD player (front)
(Except US model)

CD player (front)

1 1 - 5 buttons

2 AM button

3 FM button

4 HOLD switch

5 4-way control

6 VOL +*/–

7 DC IN 4.5 V

(page 26)

(pages 24, 27, 28)

(pages 24, 27, 28)

(page 31)

key (see below)

(volume)
control
(page 13)

(external
power input)
jack (pages
12, 33)

SECTION 2

GENERAL

This section is extracted from
instruction manual.

9 SOUND button

(pages 30, 31)

q; P MODE/

(play mode/repeat)
(MONO/ST) button
(pages 18 - 23, 25)

qa TUNING +/–•

+/– buttons

(pages 13, 24, 28)

qs DISPLAY

(MEMORY)
button
(pages 26 - 30)

qd i (headphones)

jack
(pages 12, 32)

8 Display (pages 15,18, 21, 22,

24 - 31)

5 4-way control key

Push toward u,
., > or x•

CHG (RADIO OFF).

* There is a tactile dot beside VOL to show the direction to turn up the volume.
** There is a tactile dot beside u.

u**: Play/pause (pages 13, 18, 20 - 23)
./>: AMS/search (pages 13, 18, 21,

22, 27, 28)
x•CHG (RADIO OFF):
Stop•charge (turn off the radio)
(pages 13, 24, 27, 31, 33)

qf Buckle

(page 12)

4

CD player (front)
(US model)

CD player (front)

1 AM button

(pages 24, 27, 28)

2 FM button

(pages 24, 27, 28)

3 WB (weather band) button

(pages 24, 27, 28)

4 TV button

(pages 24, 27, 28)

5 HOLD switch

(page 31)

6 4-way control

key (see below)

7 VOL (volume)

+*/– control
(page 13)

8 DC IN 4.5 V

(external power
input) jack (pages
12, 33)

9 Display (pages 15,18, 21, 22,

24 - 31)

D-NS921F

q; 1 - 3 buttons

(page 26)

qa SOUND button

(pages 30, 31)

qs P MODE/

(play mode/repeat)

•LOCAL/DX button
(pages 18 - 23, 25)

qd TUNING +/–•

+/– buttons

(pages 13, 24, 28)

qf DISPLAY

(MEMORY) button
(pages 26 - 30)

qg i (headphones)

jack
(pages 12, 32)

qh Buckle

(page 12)

* There is a tactile dot beside VOL to show the direction to turn up the volume.
** There is a tactile dot beside u.

CD player (inside)

qj STEP switch

(page 28)

6 4-way control key

Push toward u,
., > or x•

CHG (RADIO OFF).

u**: Play/pause (pages 13, 18, 20 - 23)
./>: AMS/search (pages 13, 18, 21,

22, 27, 28)
x•CHG (RADIO OFF):
Stop•charge (turn off the radio)
(pages 13, 24, 27, 31, 33)

qk G-PROTECTION

switch
(page 29)

ql Battery compartment

(pages 33, 34)

5

D-NS921F

w

DISASSEMBLY

z

The equipment can be removed using the following procedure.

SECTION 3

SET

FRONT CABINET,
UPPER LID ASSY

MD ASSY (CDM-3325ER2),
MAIN BOARD

TURN TABLE MOTOR ASSY
(SPINDLE)(M902)

Note : Follow the disassembly procedure in the numerical order given.

3-1. Front Cabinet, Upper Lid Assy

4

eight screws (B2)

6

front cabinet

SWITCH UNIT MAIN BOARD,
HOLD LEVER

MOTOR ASSY (SLED)(M901),
OPTICAL PICK-UP (DAX-25E)

1

5

2

tapping

screw

3

8

upper lid assy

2

tapping scre

7

flexible cable (CN801)(30P)

6

3-2. MD Assy (CDM-3325ER2), MAIN Board

y

D-NS921F

1

flexible cable (CN501)(15P)

4

connector (CN502)(white)

vol lever (B)

S800

7

5

6

MD assy (CDM-3325ER2)

2

connector (CN504)(white)

3

connector (CN503)(white)

8

MAIN board

cabinet lower assy

3-3. Turn Table Motor Assy (Spindle)(M902)

1

three tapping screws

×

(B1.7

2

4)

turn table motor ass
(spindle) (M902)

7

D-NS921F

3-4. Motor Assy (Sled)(M901), Optical Pick-up (DAX-25E)

1

three tapping screws

2

gear cover

7

sled spring

5

gear B

(B1.7

3

×

4)

6

screw (feed) assy

4

motor assy

(sled) (M901)

9

optical pick-up

(DAX-25E)

chassis

3-5. SWITCH UNIT MAIN Board, Hold Lever

6

tapping screw (B1.4 × 4)

7

hold lever

9

O ring

8

hold knob

3

8

1

ten tapping screws (B1.7 ×3)

2

cover lid sub assy

When installing, align S902 with the
cut-out of the hold lever.

5

SWITCH UNIT MAIN board

8

When replacing the hold knob, coat here
with the specified grease (SGL-601) .

4

flexible cable (CN802)(30P)

SECTION 4

RF level

0.45 to 0.65 Vp-p

VOLT/DIV : 100 mV (With the 10 : 1 probe in use)
TIME/DIV : 500ns

ELECTRICAL ADJUSTMENTS

D-NS921F

CD SECTION

The CD section adjustments are done automatically in this set.

Precautions for Check

1. Perform check in the order given.

2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise
indicated.

Focus bias Check

Condition:

• Hold the set in horizontal state.

• Terminate TAP802 (OPEN) by solder.

Connection:

Oscilloscope

(AC range)

3. Power supply voltage requirement : DC4.5 V in DC IN jack.

Ω

(J401)

2 K

VOLUME : Minimum
AVLS : OFF
HOLD switch : OFF

[MAIN BOARD] (Side A) [MAIN BOARD] (Side B)

TAP802 (OPEN)

IC601

IC801

TP601 (RF)

TP601 (RF)

IC301

Procedure:

1. Connect the oscilloscope to the test point TP601 (RF) on the
MAIN board.

2. Set a disc. (YEDS-18)

3. Press the

N button.

X

4. Check the oscilloscope waveform is as shown below.
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.

RF Signal reference Waveform (Eye Pattern)

To watch the eye pattern, set the oscilloscope to AC range and
increase the vertical sensitivity of the oscilloscope for easy
watching.

5. Stop revolving of the disc motor by pressing the x button.

9

D-NS921F

N

TUNER SECTION

• Switch Location and mode setting

VOLUME : MAX
BASS

AVLS : OFF

[AM]

BAND: AM
Signal generator

[FM]

BAND : FM
Signal generator

or BASS : OFF

AM RF signal
generator

30% amplitude modulation by 400Hz
signal.
Output level : as low as possible

FM RF signal
generator

Put the lead-wire
antenna close to
the set.

0 dB = 1 µV

•Repeat the procedures in each adjustment several times for the
maximum level meter indication.

•The AM tracking adjustments should be finally done by the
trimmer capacitors.

( )

: US, Canadian model

AM FREQUENCY COVERAGE ADJUSTMENT AND CHECK

Adjustment Part Frequency Display

L4

Confirmation

531kHz 1.2 ± 0.05V

(530kHz) (1.2 ± 0.05V)

1602kHz 7.2 ± 0.5V

(1710kHz) (7.6 ± 0.5V)

Reading on Digital Voltmeter

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on levelmeter
L3 621kHz (620kHz)

CT3 1404kHz (1400kHz)

FM FREQUENCY COVERAGE CHECK

Adjustment Part Frequency Display

Reading on Digital Voltmeter

Confirmation 87.5MHz 5.3 ± 0.8V

FM TRACKING ADJUSTMENT

Adjust for a maximum reading levelmeter

L1 98.0MHz

75kHz(100%) amplitude modulation
by 1kHz signal.
Output level: as low as possible

• Connecting levelmeter

set

J301 (

• Connecting digital voltmeter

TJ8 (VT)

i)

100k

16 Ω

Ω

0.01µF
FM I

point

levelmeter

digital voltmeter

TV TRACKING ADJUSTMENT

Adjust for a maximum reading on levelmeter

L5 ch10 197.75MHz

Adjustment Location: MAIN board (Side B)

CT3, L3
AM TRACKING
adjustment

L3

CT3

TJ8 (VT)

L5
TV TRACKING
adjustment

L1
FM TRACKING
adjustment

L4
AM FREQUENCY
COVERAGE asjustment

US model only

10

SECTION 5

DIAGRAMS

D-NS921F

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• : Pattern from the side which enables seeing.

(The other layers’ patterns are not indicated.)

Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.

• Indication of transistor

C
Q

B

E

Note on Schematic Diagrams:

• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in Ω and 1/
specified.

¢

•

• 2 : nonflammable resistor.

• C : panel designation.

• H : adjustment for repair.

• A : B+ Line.

•Power voltage is dc 4.5 V and fed with regulated dc pow er

•Voltages and waveforms are dc with respect to ground

•Voltages are taken with a V OM (Input impedance 10 MΩ).

• Circled numbers refer to waveforms.

• Signal path.

•Abbreviation

✩When IC803 is damaged, replace the MAIN board.

: internal component.

supply from DC IN jack (J401).
under no-signal (detuned) conditions.

Note:

The components identi­fied by mark 0 or dotted
line with mark 0 are criti­cal for safety.
Replace only with part
number specified.

Voltage variations may be noted due to normal produc­tion tolerances.

F : FM
J : CD

CND : Canadian model.

These are omitted.

4

W or less unless otherwise

Note:

Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.

• Waveforms

1

IC601 if (RFAC)

200mV/DIV, 400ns/DIV

2

IC601 rk (XTAO)

1V/DIV, 40ns/DIV

3

IC403 ef (SYNC)

5.7µs

1V/DIV, 2 µs/DIV

4

IC701 e; (XTAL)

500mV/DIV, 20ns/DIV

5

IC801 wk (XTN)

1V/DIV, 40ns/DIV

6

IC61 uf (XOUT)

13.3 µs

500mV/DIV, 4

59ns

44ns

119ns

700mVp-p

2.2Vp-p

2.6Vp-p

1.9Vp-p

2.2Vp-p

1.1Vp-p

µ

s/DIV

MEMO

7

Q86 (collector) (FM)

294ns

1V/DIV, 100ns/DIV

3.5Vp-p

1111

D-NS921F

5-1. Block Diagrams – MAIN Section –

OPTICAL PICK-UP

DAX-25E

DETECTOR

FOCUS

COIL

TRACKING

COIL

SLED

MOTOR

SPINDLE

MOTOR

• Signal Path

LASER
DIODE

PD

: FM

: CD

VCC

M

LD

OPGSW

OPSTB

RF

A
B
E

F

VCC1_2.25V

LD

PD

F+

F-

T+

T-

S+

S-

COM
U

V
W

Q601

SWITCH

VCC0

31

32

44

42

48

46

52

50

79
78
77

80

2

4
6

IC403(1/2)

COIL/MOTOR

DRIVER

SLOW

SOFT

FO3

RO3

FO2

RO2

FO1

RO1

UI
VI
WI

COM
U_OUT

V_OUT
W_OUT

SOFTPWM

PWM

DATA

CLOCK

RI3
FI2
RI2

FG

60FI3
59
58
57
56FI1
55RI1

73
72

34SYNC

70BRK

39
38
40LATCH

74

12

HG_XSTB_O

13

HG_GUP_O

X601

16.9MHz

10

FG_I

90

POWLT_O

FM ANT

HEADPHONE AMP

33

TU_LIN

35

TU_RIN

32

CD_LIN

36

CD_RIN

1

MUTE

44

INSW

31

PWRSW

3

BEEP

14

VOL_CTL

26

BST_SW

25

BST_H/L

IC301

10
17

18

19
28
16
20

25

11

D800

LOUT

CAMP-OUT

ROUT

IC403(2/2)

POWER CONTROL

SSW
VCC1

VCC2

RSTOUT35

VCPU
VCC2NF
VCC0_O
VCC0_I

STNG

VCC3

7

6

5

SPVCC
SPVCC

BATM1_I

BATM2_I

DC IN

J301

SWITCH

SUB
KEY

S804

G-PROTECTION

(OPEN/CLOSE)

D401

Q402

REG

CHARGE SWITCH

UNIT

S801

Q412

+B SWITCH

Q401

IC806
+1.5V

REG

DRY BATTRY

SIZE "AA"

(IEC DESIGNATION LR6)

2PCS, 3V

RECHARGEABLE

BATTERY
NH-WMAA
2PCS, 2.4V

J401

DC IN 4.5V

32

S800

VOL

2

1

LG

8
1
5

VIN

12

68

69

62REGB

61

65CHGB

63DET

VIN

+1.5V

A

PC0

38

18

SDCLK_O

PC3

42

17

SDXLAT_O

TU-L

TU-R

TU MUTE

67

EEP_CS_O

AD_DCINMNT

95

4
3
2
1

IC803

EEPROM

DO
DI
SK
CS

4.5V

77

56

AUD_SEL_O

AD_BATMNT

92

6

BEEP_O

PWRSW_O

VIN

D304

TU BEEP

TU VOL

TU BASS1

TUNER

SECTION

39

TU_PWRON

37

ESP_I

IC701 AVD

VCC3_2.65V

XTU BASS2

B

STOP
KEY

HOLD
OPEN

40

HOLD_I

LID-SW_I

XRESET_I

30

AD CHGMNT 93 CHGMNT_O67

XWAKE_O 32 WAKEUP37

VCC0

Q403 - 406
+B SWITCH

VCC3

VCC1_2.25V

VCC2_2.0V

VCPU

IC805
+2.4V

REG

VIN

IC702

23

TUNER

IC601

RF AMP,SERVO,DSP,

D/A CONV,D-RAM CONT

AOUT1

51

AOUT2

56

84

RFAC

88

RFDC

92

A

91

B

89

E

90

F

47

XTAI

48

XTAO

96

FFDR

95

FRDR

98

TFDR

97

TRDR

100

SFDR

99

SRDR

103

MDP

104

C176

102

MDS

CLOCK_I

XLAT_I

23

87

XLAT_O

MSCK_O

SCOR_O

27

86

SCOR_I

FOK

R8M

65

32

69

52

28

53

XIN

FOK_I

SENS_O

22

85

MSDTI_I

SDTO_I

21

20

84

83

MSDTO_O

GFS

28

GFS_I

XRST_I

4

XRST_O

XSOE_I

24

88

XSOE_O

LRMU

PCMD_O

LRCK_O

BCK_O

PCMD_I

LRCK_I

BCK_I

SYSM_I

25

7

AMUTE_O

A0

A10

XWE
XCAS
XRAS

XRDE

61

4
.

3

D0

.
6

D3

.
5

116
113

.

17
15

.

13
11

.

117

2
9
1

108
106
110

109
107
111

18

IC602
DRAM

9

12

.

A0

15

A10

19

.

21

.

8

4

XWE

23

XCAS

5

XRAS

X701

22MHz

IC801(2/2)

SYSTEM CONTROL

D0
D3

2
.

3
.

24

.

25

4
1
2

15
14
13
12

29

30

TUNER

SECTION

PCMD
LRCK
BCK

PI0
PI2
PI3
PF4

EXTAL

XTAL

SECTION

IC701

MP3 DECODER

PF0

NRST

33

34

37

60

66

11

XKRST_O

WAKEUP_K_O

C

PC1

PF3

40

41

20

19

REQ_I

SDIN_I

AD HI DC

AD BATT

VCPU

TU_PWRON

VCC3

TU_2.8V

VIN

PC2

SDOUT_O

1212

– TUNER Section –

Q3
FM

LOCAL/DX

L3

AM FERRITE-BAR

ANTENNA

D3

• Signal Path

: FM

10kHz

S902

STEP

9kHz

VCPU

EXCEPT US

US

TU_2.8V

Q84, 85

LPF

US

T81,Q86 - 88

CONVERTER

FL2

B.P.F

FL1

B.P.F

D1

D2

D5

L4

AM OSC

DC/DC

L1

FM RF

L2

TV/FM OSC

L5

TV RF

Q089, 090

+B SWITCH

2

1

28
29

27

24

30

25

IC82
+1.8V

3

REG

S911 - 915
FUNCTION

KEY

FMRFIN

TVRFIN

AMB/P
FMRFOUT

AMRFIN

FM/TVOSC

TVRFOUT

AMOSC

2

VCPU

OSCOUT

IFCOUNT

REQSW

FAV KEY

FM-MIX

AM-MIX

QUAD

MODE-1

MODE-2

4

5

11

21

22

23

19

20

Q4,5

+B SWITCH

IC1

FM /AM

IF/RF AMP

CF2,3

10.7MHz

450kHz

X1

10.7MHz

Q2

CF1

V IN

8

10

FM-IFIN

AM IFIN

L-OUT

R-OUT

Q6

BAND

CONTROL

Q7

BAND

CONTROL

Q71

AMP

VERSION SETTING

D-NS921F

FM ANT

16

15

IC61

DTS MICROCONTROLLER

IC62

EEPROM

1CS

DI

3

DO

4

SK

2

IC801(1/2)

SYSTEM CONTROL

22

DTS_SDTI

21

DTS_SDTO

23

DTS_SCK

35

ACKCD_I

16

LCD_REQ_O

55

CDON_O

59

DTS_RST-O

68

TUON_I

96

AD_KEY1

97

AD_KEY2

98

AD_KEY3

JOGKEY_I/FAVKEY_I

36

TU_POWERON_O

IC81
+1.6V

2

3

REG

Q92

LCD_A0

LCD-XRST_O 73 RES

VCPU

D932

50

AD6

51

AD7

69

P/S_O 61 P/S

44

AD0

49

AD5

XRD_O 71

XWR_O 72 WR

54

VCC3

TU_2.8V

X61

75kHz

VCPU

53

BAND CTRL1-O

52

BAND CTRL2-O

71

AM IN

SDO-O-CDU

64

IF IN

60

+B ON/OFF_O

61

IFREQ-O

55

MONO OR LOCAL-O-CTR

65

EO(D01)_O

75

XIN

74

XOUT

35 DEST-I

25 DESTVSS_O

21

AM STEP-I

36

FAV KEY_I

TUBASS1-O
XTUBASS2-O
PWM OUT_O

XLID OPEN-I

TUMUTE-O

EEP CS_O

CS_O
A0_O

SDI-I-CDU

SCK-I-CDU

ACK CD-O

ACK2DTS-I

CD ON_I
RESET_I

TU ON_O

TUBEEP_O

TU HOLD_I

VDD

AD DC REF

62

32

27
26

47
46
48

54
28
39
73

38

42KEY_I

37SUBKEY_I

49
58
59
50

51
29

43BATT-I
44 HIDC-I

72

45

TU-L

TU-R

TU MUTE

IC903

4

STOP

TU BEEP

TU BASS1

XTU BASS2

TU_VOL

KEY
HOLD
OPEN

VCC3

AD BATT

AD HI DC

VCPU

TU_2.8V

VIN

TU_PWRON

MAIN

A

SECTION

LCD901

CS

D6

12

LIQUID
CRYSTAL
DISPLAY

D7
A0

D0
D5

RD

VDD

MAIN

B

SECTION

MAIN

C

SECTION

S803

HOLD

OFF

S907 - 910
FUNCTION

ON

KEY

S903 - 906
FUNCTION

KEY

SUBKEY

CD/TU KEY

Q801

Q802

1313

D-NS921F

5-2. Printed Wiring Board – MAIN Board (Side A) – : Uses unleaded solder.

A

B

C

D

IC82

IC81

IC701

IC62

• Semiconductor

Location

Ref. No. Location

D81 C-2
D304 D-4
D401 E-3
D411 G-5
D426 E-2
D800 E-5
D801 D-5
D802 D-5

IC62 A-7
IC81 B-4
IC82 B-4
IC404 E-3
IC701 A-5
IC805 E-5

Q3 E-7
Q4 B-4
Q5 B-4
Q302 D-4
Q401 E-2
Q402 E-3
Q403 G-5
Q405 G-6
Q406 G-6
Q601 F-6
Q801 D-5
Q802 D-5

E

F

G

H

IC404

IC805

I

12

345678

1414