Pioneer XWHTD-640 Service manual

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2004

÷

Ask user to bring the Transmitter and Wireless Speaker pair set together when

servicing.

XV-HTD640 RRV2930

S-HTD540

XW-HTD640

RRV2943

DVD/CD RECEIVER

DVD 5.1ch SURROUND SYSTEM

SPEAKER SYSTEM

DIGITAL WIRELESS SPEAKER
SYSTEM

This manual

Component System

Service Manual Remarks

RRV2987

CHANNEL

1

2

3

4

ORDER NO.

RRV2987

XW-HTD640

Digital Wireless Speaker System

XW-HTD640

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Model Type Power Requirement Remarks

XW-HTD640 KUCXJ AC120V

For details, refer to "Important symbols for good services" .

T-ZZR JULY 2004 printed in Japan

1234

SAFETY INFORMATION

A

This service manual is intended for qualified service technicians; it is not meant for the casual
do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been
trained to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.

WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to

B

cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 – Proposition 65

NOTICE
(FOR CANADIAN MODEL ONLY)
Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement
parts must be of identical designation.

REMARQUE
(POUR MODÈLE CANADIEN SEULEMENT)
Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que

C

les pièces de remplacement doivent avoir la même désignation.

(FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS

The following check should be performed for the
continued protection of the customer and service
technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or

D

equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads, metal overlays, control shaft, etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.

Leakage
current

E

Device
under
test

Also test with
plug reversed
(Using AC adapter
plug as required)

Test all
exposed metal
surfaces

AC Leakage Test

tester

Reading should
not be above

0.5 mA

Earth
ground

ANY MEASUREMENTS NOT WITHIN THE
LIMITS OUTLINED ABOVE ARE INDICATIVE
OF A POTENTIAL SHOCK HAZARD AND
MUST BE CORRECTED BEFORE RETURN­ING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance
have special safety related characteristics. These are
often not evident from visual inspection nor the
protection afforded by them necessarily can be obtained
by using replacement components rated for voltage,
wattage, etc. Replacement parts which have these
special safety characteristics are identified in this
Service Manual.

Electrical components having such features are
identified by marking with a
on the parts list in this Service Manual.
The use of a substitute replacement component which
does not have the same safety characteristics as the
PIONEER recommended replacement one, shown in the
parts list in this Service Manual, may create shock, fire,
or other hazards.

Product Safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current PIONEER
Service Manual. A subscription to, or additional copies
of, PIONEER Service Manual may be obtained at a
nominal charge from PIONEER.

on the schematics and

F

2

1234

XW-HTD640

5678

[ Important symbols for good services ]

In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.
When you find the procedures bearing any of the symbols, be sure to fulfill them:

1. Product safety

You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and
should keep the safety during servicing by following the safety instructions described in this manual.

2. Adjustments

To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable.
In accordance with the procedures or instructions described in this manual, adjustments should be performed.

3. Cleaning

For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,
proper cleaning should be performed to restore their performances.

4. Shipping mode and shipping screws

To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or
the shipping screws should be installed before shipping out in accordance with this manual, if necessary.

A

B

5. Lubricants, glues, and replacement parts

Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying
glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the
prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed
ones should be used.

C

D

56

XW-HTD640

E

F

3

7

8

1234

CONTENTS

SAFETY INFORMATION..................................................................................................................................... 2

1. SPECIFICATIONS ............................................................................................................................................ 5

2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6

A

B

C

D

2.1 PACKING SECTION .................................................................................................................................. 6

2.2 TRANSMITTER SECTION......................................................................................................................... 8

2.3 WIRELESS SPEAKER SECTION........................................................................................................... 10

2.4 AMP SECTION ........................................................................................................................................ 12

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ..........................................................................................14

3.1 BLOCK DIAGRAM ................................................................................................................................... 14

3.2 OVERALL WIRING DIAGRAM................................................................................................................. 16

3.3 TX ASSY .................................................................................................................................................. 18

3.4 MAIN, POWER, OP, PRI and SW ASSYS ............................................................................................... 20

3.5 AMP and REGULATOR ASSYS .............................................................................................................. 22

3.6 TX MODULE(1/3) ..................................................................................................................................... 24

3.7 TX MODULE(2/3) ..................................................................................................................................... 26

3.8 TX MODULE(3/3) ..................................................................................................................................... 28

3.9 RX MODULE(1/4) .................................................................................................................................... 30

3.10 RX MODULE(2/4) .................................................................................................................................. 32

3.11 RX MODULE(3/4) .................................................................................................................................. 34

3.12 RX MODULE(4/4) .................................................................................................................................. 36

3.13 WAVEFORMS........................................................................................................................................ 38

4. PCB CONNECTION DIAGRAM ..................................................................................................................... 39

4.1 TX ASSY .................................................................................................................................................. 40

4.2 OP and SW ASSYS ................................................................................................................................. 41

4.3 MAIN ASSY ............................................................................................................................................. 42

4.4 POWER and PRI ASSYS......................................................................................................................... 44

4.5 AMP and REGULATOR ASSYS .............................................................................................................. 46

4.6 TX MODULE ............................................................................................................................................ 48

4.7 RX MODULE............................................................................................................................................ 50

5. PCB PARTS LIST ........................................................................................................................................... 52

6. ADJUSTMENT ............................................................................................................................................... 56

7. GENERAL INFORMATION ............................................................................................................................. 57

7.1 DIAGNOSIS ............................................................................................................................................. 57

7.1.1 TROUBLESHOOTING........................................................................................................................ 57

7.1.2 NOTES ON REPLACE OF PARTS ..................................................................................................... 58

7.1.3 DIAGNOSIS OF THE AMPLIFIER SECTION..................................................................................... 58

7.1.4 PROTECTION CIRCUIT..................................................................................................................... 59

7.1.5 DISASSEMBLY ................................................................................................................................... 61

7.2 IC ............................................................................................................................................................. 64

8. PANEL FACILITIES ........................................................................................................................................ 73

E

F

4

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XW-HTD640

5678

1. SPECIFICATIONS

A

Digital Wireless Speaker System (XW-HTD640)

General

Digital Wireless Speaker System (Transmitter /
Wireless speaker)

Transmitter

AC adapter:

Power requirements . . . . . . . . . . .AC120V, 60 Hz

Power consumption . . . . . . . . . . . . . . . . . . . .. 8W

Rated output . . . . . . . . . . . . . . . . . . . .12V/300mA

Power consumption (without AC adapter) . ..2 W

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RCA jack

Weight . . . . . . . . . . . . . . . . . . . . . . . .0.3 kg / 11 oz

Dimensions . . . . . 166 (W) x 56 (H) x 112 (D) mm

6

9/16 (W) x 2 3/16 (H) x 4 7/16 (D) in.

Wireless speaker

Power requirements . . . . . . . . . . .AC120V, 60 Hz

Power consumption . . . . . . . . . . . . . . . . . . . .57W

Amplifier characteristics

Maximum power output . . . . . . . . . . . . . .25W/ch

Speaker unit. . . . . . . . . . . . . . .7 cm cone type x2

Weight . . . . . . . . . . . . . . . . . . . . .

Dimensions (without

antenna) . . . . . . . .

16

RMS(1kHz, THD 10%,4Ω)

4.0 kg / 8lb 14oz

430 (W) x 180(H) x 138 (D) mm

15/16 (W) x 7 1/8 (H) x 5 7/16(D) in.

Accessories (XW-HTD640)

AC adapter
RCA stereo cord
Warranty card
AC Power cord

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..1

. . . . . . . . . . . . . . . . . . . . . . . . . ..1

. . . . . . . . . . . . . . . . . . . . . . . . . . ..1

. . . . . . . . . . . . . . . . . . . . . . . . . . . .1

B

C

Accessories

• AC Adapter
(AWR7006 : KUCXJ)

• AC Power Cord
(ADG7021 : KUCXJ)

D

• RCA stereo cord(L=1.5m)
(XDE3045)

E

F

56

XW-HTD640

5

7

8

1234

2. EXPLODED VIEWS AND PARTS LIST

NOTES:

A

Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.
The mark found on some component parts indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical designation.
Screws adjacent to mark on product are used for disassembly.
For the applying amount of lubricants or glue, follow the instructions in this manual.
(In the case of no amount instructions, apply as you think it appropriate.)

2.1 PACKING SECTION

B

C

2

1

4

Transmitter

8

5

3

FRONT

11

13

D

E

9

Wireless Speaker

TOP

10

F

6

1234

XW-HTD640

12

>

5678

PACKING SECTION parts List

No. Description Part No.

Mark

1 Accessory Box Wiz AHB7091

2AC Adapter AWR7006

3 RCA Stereo Cord XDE3045

NSP 4 Literature Bag AHG1180

5AC Power Cord ADG7021

6• • • •

7• • • •

8Polyethylene Bag VHL1051

9Packing Sheet (large) AHG7010

10 Pad L AHA7430

11 Pad R AHA7431

12 Packing Case AHD8288

NSP 13 Warranty Card ARY7045

A

B

C

D

E

56

XW-HTD640

F

7

7

8

1234

2.2 TRANSMITTER SECTION

A

B

3

4

5

C

8

1

A

2

J

D

E

8

8

6

8

8

8

8

7

7

9

F

8

1234

XW-HTD640

8

*

5678

TRANSMITTER SECTION parts List

No. Description Part No.

Mark

1 TX Assy AWU8228

2 TX Module AXF7010

3Top Panel Wiz AAK8205

4 CS Lens AAK8133

5 CS Button T AAD7729

6 Chassis T ANA7157

7 Leg AEB7090

8TORX Screw *

NSP 9 Name Label T AAL7362

ABA7111

A

Use TORX driver GGK1028.

B

C

D

56

XW-HTD640

E

F

9

7

8

1234

2.3 WIRELESS SPEAKER SECTION

A

B

C

D

47

47

NON-CONTACT

SIDE

36

47

CONTACT SIDE

A

50

5

F

18

6

42

48

41

47

K

25

22

L

J

47

7

38

46

39

32

34

4

K

49

E

40

33

3

46

51

24

M

47

D

13

49

49

44

K

19

J

23

C

31

48

48

B

17

49

47

46

9

10

47

46

Refer to
"2.4 AMP MODULE L-2CH"

F

23

16

8

D

E

G

I

F

A

H

C

2

D

47

11

H

G

I

L

C

46

21

1

52

46

M

E

46

46

F

10

1234

37

46

46

12

46

28

B

46

E

20

46

B

12

29

43

20

XW-HTD640

>

>

5678

WIRELESS SPEAKER SECTION parts List

No. Description Part No.

Mark

1 MAIN Assy AWU8229

2POWER Assy AWU8230

3 OP Assy AWU8231

4 SW Assy AWU8233

5 PRI Assy AWU8234

NSP 6 Jangan Buang PCB

7 RX Module AXF7011

NSP 8 AMP Module L-2CH AXQ7253

9Power Transformer (T1) ATS7366

10 Fuse (FU1 : 1.6A) REK1110

No. Description Part No.

Mark

50 Fuse Cade AAX7520

NSP 51 GETTER EX AAX8043

NSP 52 Name Label (Ku) AAL7353

A

11 4P Cable Assy ADX7431

12 Speaker B70AC50-52C

13 13P FFC/60V ADD7467

14 • • • •

15 • • • •

16 Chassis ANA7156

17 Rear Panel ANC8270

18 PCB Angle ANG7464

19 Shield Cover A ANK7112

20 Rubber Leg AEB7318

NSP 21 PCB Spacer (3x6) AEC7156

22 Push Rivet AEC7221

23 Mini Clamp AEC7373

24 Top Barrier AEC7496

25 PCB Binder VEF1040

26 • • • •

27 • • • •

28 Baffle WIZ L AMD7011

29 Baffle WIZ R AMD7012

30 • • • •

NSP 31 PC Support VEC1749

32 MIC Knob AAB7262

33 Slide Knob AAC7052

34 Power Button AAD7722

35 • • • •

B

C

D

36 Name Plate AAM7013

37 Front Panel AMB7876

38 Grille Assy AXG7225

39 Operation Panel AAK8196

40 OP Lens AAK8198

NSP 41 SP Grille WIZ AAK8197

NSP 42 Jersey Net AAR7011

43 Rear Case Assy AXG7224

44 Screw BBZ40P060FTC

45 • • • •

46 Screw BPZ40P100FNI

47 Screw BBZ30P060FTC

48 Screw VPZ30P080FNI

49 Screw BBZ30P080FNI

56

XW-HTD640

E

F

11

7

8

1234

2.4 AMP SECTION

A

B

7

3

8

11

7

13

5

4

13

7

C

2

D

I

8

13

14

12

9

10

14

15

9

15

E

9

1

H

6

13

F

12

1234

XW-HTD640

5678

AMP SECTION parts List

No. Description Part No.

Mark

1 AMP Assy AWU7968

2 REGULATOR Assy AWU7969

3 DC Fan Motor AXM7025

4 Heat Sink ANH7169

5Fan Mold AMR7470

6 Rear Mold AMR7437

7 Insulation Rubber AEB7256

8 Insulation Plate AND7055

9 FET Bracket A ANG7432

10 PCB Holder ANG7472

A

11 Mica Sheet A AEE7049

12 Mica Sheet B AEE7050

13 Screw (3x10) ABA7117

14 Screw BPZ30P080FNI

15 Screw BBZ30P060FTC

B

C

D

56

XW-HTD640

E

F

13

7

8

1234

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

TRANSMITTER SECTION

TX ASSY

A

IC8501

BU4052BCF

Ch.1

Ch.2

Ch.3

B

Ch.4

JA8202

L

R

INPUT

WIRERESS

JA8001

DC IN

Ch Select SW.

Q8501

11

Q8502

15

9

14

12

IC8001

BA09FP

10

Ch. select

Q8503

Q8504

9V REG.

V+12 V+9RF

1 3

Q8506

Q8505

VA+9

CN8201

VD+9

(12P)

11

12

LED 2

3

LED 1

4

CHSEL

2

LIN

6

RIN

8

V+9RF

V+9RF

C

TX MODULE

J

H2

(12P)

PLD02

3

PLD01

4

CHANNELSEL

2

6

2

8

1

11

A/D Converter

12

+9V

ANT1

12

U3

AIC1680

System

Power On Reset

1

SDTO

U9

U23

AWD601TX

RF Tx Module

RFINANT

13

9

CHAN2

CHAN1

CHAN3

AINL

AINR

AK5380VT

DATA

X1

24.576MHz

RESET

11

CHANNELBIT1

64

CHANNELBIT2

12

CHNNELSEL

8

SDTO

58

1
8
9
7

3 5

CLKIN CLKOUT

Freesystems

RFOUT

CHANNEL1

CHANNEL2

31 33 34 35

U1

FS2105TX

Tx Chip

CHANNEL3

AIC1734-50CXA

REG.

+9V

3 2

NCP1117ST50T3

5V REG.

3 2

AIC1734-33CXA

3.3V REG.

D5V

3 2

52806-0910

EEPROM Prog.

Interface

EEPROM for FS

U21

U6

U22

H10

U7

RFSUPPLY+

A5V

D3V3

D

E

F

14

X3

24.576MHz

U20

AIC1680

System Reset

3

VCXO1-VCXO8

RX MODULE

K

OP ASSY

D

ANT2ANT3

U12

RFANT1

RFANT2

AWD601RX

RF Rx Module

DATA6CHAN18CHAN4

3

5

7

NC7SPU04

VCXO

2 4

12.288MHz

31

CLKIN

RFINSDTI

CLKOUT

U2

FS2105RX

Freesystems Rx Chip

RESETIN

VCLKIN

58

54

6

U18

P5X

X2

1714

U16

35

CHANNEL3

11

40

CHANNEL2

A3V3

D5V

VOUTL

DATA

2

VOUTR

U28

PCM1742KE

D/A Converter

AIC1734-50CXA

5V REG.

D5V

2 3

U19

AIC1734-33CXA

3.3V REG.

D3V3

2 3

U17

NCP1117ST50T3

5V REG.

A5V

2 3

H6

52807-0910MOLEX

EEPROM Prog.

Interface

U11

EEPROM for FS

7

8

3

NJM4558

DAC Filter

RFSUPPLY+

+9V

+9V V+9RF

12

11

7

5

1

U24

H3

(12P)

8

6

SURROUND

V+9

V+9

LOUT

ROUT

STEREO

1

2

5

7

CN3701

(12P)

5

7

IC3051

NJM4558MD

3

1

CN3504

CN3051

3

5

IC3301

NJM4558MD

VR3051

VOL

(13P)

7 5 8 1 6

LVIN

RVIN

LVOUT

7 9 8 1 6

(13P)

5 14

Y1 X1

X0

1

12

7

Y0

1

BU4052BCF

IC3001

Selecter

RVOUT

X (Lch)

Y (Rch)

VREF

VA+9

VA+9

VREF

4413

VA+9

VREF

9

13

3

13

Mode

XW-HTD640

1234

5678

SPEAKER SECTION

POWER ASSY

C

+B

D13

CN12

(13P)

CN13

(13P)

D16

D15

D14

1 4 7 8 101111

AC

VDET

+B (FAN H)

+B (UNPRE+5)

1 4 7 8 10

D12

+B

+B

D11

CN11

A

B

PRI ASSY

F

T1

POWER

TRANSFORMER

MAIN

2

MAIN

121

1
2

FU1

CN1CN2

NEUTRAL

LIVE

2
1

J1

21

MAIN ASSY

B

CN4

1
2

AC IN

SW ASSY

E

S1

C

D

V+9RF

AMP MODULE L-2CH

AMP ASSY

H

LIN

RIN

MUTE

+B
+B

+B

1
3
6

REF5V

7
9

PRE REG.

+B

14
15

1
2
7
5
8

10

Circuit

for Power

CN3302

(15P)

CN3303

(10P)

Amp

REGULATOR ASSY

I

UPRE5V

PRE12V

+B

PRE12V VP

PRE REG.

Circuit

for +5V

Short DET.

FAN DET.

XW-HTD640

R IN

CN3651

1
3
6

REF5V

7

PRE12V

9
14
15

CN3304

(15P)

VA+9VD+9

CN3305

(10P)

UPRE5V

1

PRE5V

V+5

2

7

5

8
10

REF5V

PRE12V

XPROTECT

56

L IN

1

13

TDA8560Q

Power Amp.

Q3305

1
2

IC3301

11

MODE

DC FAN

MOTOR

7

9

4

CN3301

(5P)

5
4
1
2

L +OUT

R +OUT

5
4
1
2

CN3306

(5P)

J3401

L +
L -

R +

R-

8

INSIDE
SPEAKER

E

F

15

1234

3.2 OVERALL WIRING DIAGRAM

• Transmitter Section

A

WIRERESS

INPUT

DC IN

B

• Speaker Section

C

R

L

JA8202

JA8001

A

TX ASSY
(AWU8228)

CN8201 H2

STATUS (NC)

1
2
3
4
5
6
7
8

GNDRF

9

GNDRF

10
11
12

CHSEL

LED 2
LED 1

GND

LIN

GNDA

RIN

V+9RF
V+9RF

1
2
3
4
5
6
7
8

9
10
11
12

K

J

TX MODULE
(AXF7010)

RX MODULE
(AXF7011)

H3

12 11 10 9 8 7 654

312

ANT1

ANT2

ANT3

D

E

POWER CORD
: ADG7021

F

CN1 CN2

PRI ASSY

NEUTRAL

2
1

(AWU8234)

LIVE

POWER

TRANSFORMER

: ATS7366

1
2

V+9

V+9

GND3GND

GND

GND

LOUT

ROUT

ERROR

STATUS

CH. select

SCAN_MODE

11

1

2

4

5

CN3701

MAIN ASSY (AWU8229)

B

CN13

CN12

T1

CN11

212

1

6

1 2 3 4 5 6 7 8 91012

GNDFAN

GNDPRE5

+B (FAN H)

+B (UNPRE+5)

1

2

3

4

C

10

7

8

9

12

11 13 14 15

+B

GNDREG

GNDPRE12

6

7AC8

VDET

9

GNDSW

10

11+B13

PROTECT

12

GNDRF

5

POWER ASSY
(AWU8230)

GNDP14GNDP

15

E

SW ASSY
(AWU8233)

F

16

J1

12

XW-HTD640

CN4

12

1234

5678

NOTES: • When ordering service parts, be sure to refer to “EXPLODED

VIEWS and PARTS LIST” or “PCB PARTS LIST”.

• The > mark found on some component parts indicates the

importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical
designation.

• : The power supply is shown with the marked box.

AMP MODULE L-2CH (AXQ7253)

A

B

CN3302

1 2 3 4 5 6 789

LIN

1

CN3304

CN3051

RIN

GNDA

GNDA

2

3

4

1 2 3 4

Mode

GNDD

RVOUT

H

AMP ASSY
(AWU7968)

STBY

MUTE

REF5V

SENSE (PRE12V)

5

6

7

8

5 6 7 8 9

LVIN

GNDA

GNDA

GNDA

LVOUT

101211 13 14 15

GNDP

H/L CONT

GNDPRE12V

11

10

12

101211 13

RVIN

GNDA

CH. select

GNDP

13+B14+B15

VA+9

PRE12V

9

VREF

CN3301

1 2 3 4 5

R–

R+

GNDP

1

2

3L–4L+5

CN3306

I

REGULATOR ASSY
(AWU7969)

CN3303

1 2 3 4 5 6 789

PRE5V

UPRE5V

1

PRE12V

GNDPRE5

SENSE (PRE+5V)

2

3

4

5

H/L CONT

6

CN3305

REF5V

XPROTECT

7

8

10

+B

FANGND

10

9

CN3651

J3401

SL+ (R+)

SL– (R–)
SR– (L–)

SR+ (L+)

DC FAN

MOTOR

+

1

–

2

R ch
SPEAKER

1
2
3
4

: B70AC50-52C

L ch
SPEAKER
: B70AC50-52C

C

D

E

CN3502

10

11

1

2

3

4

5

6

7

8

9

13

12

D

OP ASSY
(AWU8231)

56

XW-HTD640

F

17

7

8

1234

3.3 TX ASSY

A

B

INPUT

WIRERESS

TX ASSY (AWU8228)

A

C

D

E

F

A

18

1234

XW-HTD640

5678

: The power supply is shown with the marked box.

: AUDIO SIGNAL ROUTE (L ch)

A

B

H2

J 2/3

C

CH Select SW.

D

E

Switches

S8901 : Ch. select

F

56

XW-HTD640

A

19

7

8

1234

3.4 MAIN, POWER, OP, PRI and SW ASSYS

CN3302

A

B

H

CN3303

I

CN3301

H

C

C

D

E

POWER ASSY
(AWU8230)

POWER TRANSFORMER

T1

ATS7366

POWER CORD
ADG7021

F

B C F

20

SW ASSY

E

(AWU8233)

REK1110

1.6A

• NOTE FOR FUSE REPLACEMENT

PRI ASSY (AWU8234)

F

1234

CAUTION

XW-HTD640

5678

MAIN ASSY

B

(AWU8229)

: AUDIO SIGNAL ROUTE (L ch)

H3

K 2/4

A

B

C

Switches

S5901 : SURROUND/STEREO
S5902 : Ch.select

56

OP ASSY (AWU8231)

D

: The power supply is shown with the marked box.

XW-HTD640

7

D

E

F

DB E

21

8

1234

3.5 AMP and REGULATOR ASSYS

REGULATOR ASSY (AWU7969)

A

B

I

C

D

E

DC FAN

MOTOR

14.7V

8.4V

16.4V

B

CN3305

26.4V

F

I

22

1234

XW-HTD640

5678

B

CN3306

: The power supply is shown with the marked box.

: AUDIO SIGNAL ROUTE (L ch)

AMP ASSY (AWU7968)

H

A

B

C

B

CN3304

D

E

F

56

XW-HTD640

H

23

7

8