Jvc SU-DH1-JE Service Manual

SERVICE MANUAL

SURROUND SOUND HEADPHONE ADAPTOR

XC04520063

SU-DH1-J/E

Model No.

TM

Model No.(Bottom)

TABLE OF CONTENTS

1 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

COPYRIGHT © 2006 Victor Company of Japan, Limited

No.XC045

2006/3

SPECIFICATION

SU-DH1-J/E

Playable format Dolby Digital (Dolby Surround EX), Dolby Pro Logic II, DTS (DTS-ES 6.1ch),MPEG-2 AAC, PCM

(Fs=44.1kHz, 48kHz)

Surround function Dolby Headphone (DH1/DH2/DH3), Dolby Pro Logic II (AUTO/MOVIE/MUSIC)

Input terminals Optical digital signal mini jack x 1, LINE IN signal cord with Gold plated stereo mini plug (3.5mm) x 1

Headphone output Stereo mini jack x 1

Power requirements Alkaline AA battery (DC 1.5V) x 2

Battery life approx. 10hours (using Alkaline AA battery), approx. 2.5hours (using Manganese AA battery)

Dimensions 82mm x 20mm x 86mm (W/H/D)

Mass approx. 99g (include Manganese AA battery)

Accessories Manganese AA battery (R6P) x 2 (for initial use), Carrying pouch x 1, Dual plug adaptor x 1

1-2 (No.XC045)

1.1 Disassembly method

r

Switch knob

SECTION 1

DISASSEMBLY

Top case

Main board

Side panel L

Switch knob

Bottom case

Side panel R

B

A

B

BACK
SIDE

A

Line IN cord

Boss 'a'

Bond of rubber

Bottom case

Battery cove

(1) Remove the battery cover from the back of the main body, and then pull out the line-in cord from the slot.
(2) From the back of the main body, respectively remove the two screws A, and another two screws B attaching the bottom case.
(3) Turn the main body back to the original position, and then remove the top case.
(4) When removing the main board by lifting it up, the side panels L/ R will also be removed.

* Please fix boss 'a' part and the code in the bond of rubber after the code ties to boss 'a' part of the projection of the
bottom case when you install line in cord in the bottom case.

* When attaching the side panels L/ R, make sure to confirm that each switch (SW1, SW2) on the main board is firmly
placed in the hole of the each switch knob.

(No.XC045)1-3

SECTION 2

TROUBLESHOOTING

2.1 Measuring instrument

• DC power supply (3V 500mA can be output.)

• Audio signal generator

• Vacuum Tube Volt Meter

• Oscilloscope

• DVD Player with optical digital output

2.2 About power supply

Please set the output voltage of the DC power supply to 3V, connect with SP1 and SP2 on the substrate as follows, and do the con­firmation work.
SP1: The plus output of the DC power supply is connected.
SP2: Ground of the DC power supply is connected.

SP2

2.3 Analog signal input level

500mVrms

2.4 YES → Normal
NO → The voltage and the waves are abnormal.

2.5 Check method

SP1

F1

J1

R95

R23

D4

C86

R36

R90

R22

F2

X1

D5

R85

R37

Q3

SW1

C46

SW3

Q2

C66

C50

C45

K6

Q1

D2

R24

D1

C26

D6 D7

C85

IC4

R30

D9

D3

C78

C67

IC8

R28

R29

R34

C51

R33

R31

R32

R27
R26

Q4

R35

IC9

C71

Q5

R69

D8

R44

R41

R40

C92

R45

D11

D10

K15

C151

C152

R3

R2

J4

R5

R4

C69 C70

IC11

C93

R46

R43

SW2

C54

SW4

C91

Symptom Check point Voltage and waves when

it is normal

The power supply is not

1 Both sides of F2 DC approx. 0V NO→ Defect of F2

turned on.

2 IC1 8pin DC approx. 3.3V NO→ Defect of IC1

3 IC6 4pin DC approx. 1.3V NO→ Defect of IC6

4 IC5 1pin DC approx. 3.3V NO→ Defect of IC5

5 IC8 10pin f=10MHz NO→ Defect of IC8 or Check on circuit in

6 IC8 7pin DC approx. 3.3V NO→ Defect of IC8 or Check on circuit in

7 IC7 3pin f=12.288MHz NO→ Defect of IC7 or Check on circuit in

Check part and breakdown parts

YES→ check of 2

YES→ check of 3

YES→ check of 4

YES→ check of 5

surrounding.

YES→check of 6

surrounding.

YES→ check of 7

surrounding.

YES→ Defect of IC2 or Check on circuit in

surrounding.

1-4 (No.XC045)

Symptom Check point Voltage and waves when

it is normal

Analog input :
The sound is not emitted.

8 C5, C6 Positive pin Sine wave NO→ Connected check from J4 to C4, C5

9 C28, 29 Positive pin Sine wave NO→ Defect of IC2, IC3

Check part and breakdown parts

YES→ Check since 9

YES→ Check since 10

Digital input :
The sound is not emitted.

LED doesn't light.
(D4 to D11)

10 IC9

2pin (L ch),4pin (R ch)
(The volume is confirmed
in the maximum.)

11 IC9 10pin DC approx. 3.3V NO→ Check of Q4, Q1, Q5, IC8

12 IC9

9pin (L ch),7pin (R ch)
(The volume is confirmed
in the maximum.)

13 IC10 1pin

(The DVD player etc. are
connected with an optical,
digital input.)

14 IC11 13pin DC approx. 0V NO→ Defect of IC8 and Check on circuit

Sine wave NO→ Defect of R99 and Check on circuit

in surrounding.

YES→ Check since 11

YES→ Check since 12

Sine wave NO→ Defect of IC9 and Check on circuit

in surrounding.

YES→ J3 Check on circuit in surround-

ing.

NO→ Defect of J2
YES→ IC10 and Check on circuit in sur-

rounding.

in surrounding.

YES→ Defect of IC11 and Check on cir-

cuit in surrounding.

(No.XC045)1-5

Victor Company of Japan, Limited
ACCESSORIES CATEGORY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan

(No.XC045)

Printed in Japan

VPT