DOWNLOAD Sharp HT-CN500DVH (serv.man7) Service Manual ↓ Size: 6.05 MB | Pages: 76 in PDF or view online for FREE

– 37 –

IC802  55PIN

IC503  50PIN

IC501  16PIN

– 38 –

If you experience any of the following difficulties while using the
system, use troubleshooting guide to help you remedy the
problem. Should any problem persist, consult your nearest
service center.

No power
• Is the power cord firmly plugged into the power outlet?

• One of the safety mechanisms may be operating. In this event,

unplug the player from the power outlet briefly and then plug
it in again.

• Check that the system is connected securely.
• The video connecting cord is damaged. Replace it with a new

one.

• Make sure you connect the system to video input connector

on the TV.

• Make sure you turn on the TV.

• Make sure you select the video input on the TV so that you can

view the pictures from this system.

• Clear the disc.

• If video from this system has to go through your VCR to get to

your TV, the copy-protection applied to some DVD programs
could affect picture quality. If you still experience problems
after checking your connections, please try connecting your
DVD system directly to your TV's S-Video input, if your TV is
equipped with this input.

The aspect ratio of the screen cannot be changed even
though you set "TV DISPLAY" in the SETUP menu when
you play a wide picture.
• The aspect rate is fixed on your DVD disc.

• If you connect the system with the S-Video cable, connect

directly to the TV. Otherwise, you may not change the aspect
rate.

• Depending on the TV, you may not change the aspect rate.

There is no sound or only a very low-level sound is heard.
• Check that the speakers and components are connected

securely.

• Make sure that you have selected the correct source on the

system.

• The protective device on the system has been activated

because of a short circuit. Turn off the system, eliminate the
short-circuit problem and turn on the power again.

• The audio connecting cord is damaged. Replace it with a new

one.

• The system or fast reverse is performed. Press PLAY/PAUSE

 to return to normal play mode.

• Check the speaker settings.

• Check that the speakers and components are connected

correctly and securely.

• Adjust front balance parameter using SELECT and VOLUME

+/-.

• Check that the speakers and components are connected

securely.

• Check that the connecting cords are away from a transformer

or motor, and at least 3 meters away from a TV set or
fluorescent light.

• Move your TV away from the audio components.

• The plugs and jacks are dirty. Wipe them with a cloth slightly

moistened with alcohol.

• Clear the disc.

The sound loses stereo effect when you play a Video CD or
a CD.
• Set the Audio mode to "STEREO" in the SETUP menu.

• Make sure you connect the system appropriately.

• The surround effect is difficult to hear when you are playing a

Dolby Digital sound track.

• Check the speaker connections.
• Depending on the DVD disc, the output signal may not be the

entire 5.1 channel but monaural or stereo even if the sound
track is recorded in Dolby Digital format.

• Depending on the disc, the sound may come from the center

speaker only.

• Make sure the Center is set to "ON" in SETUP menu.

• You may set the listening mode to Dolby Pro Logic Phantom.

• Adjust the speaker volume.

• Make sure the Rear is set to "ON" in SETUP menu.

• Adjust the speaker volume.

The language for the subtitles cannot be changed when
you play a DVD.
• Multilingual subtitles are not recorded on the DVD.

• Changing the language for the subtitles is prohibited on the

DVD.

• Depending on the DVD, you may not be able to turn the

subtitles off.

• Multi-angles are not recorded on the DVD.

• Change the angles when the angle mark appears on the TV

screen.

• Changing the angles is prohibited on the DVD.

• Static electricity, etc., may affect the system's operation.

• Press the POWER button to turn off, then press again to turn

– 39 –

1

FWD

Output change pin (FWD) for 5CH (VLO), logic input for loading block.

2

REV

Output change pin (REV) for 5CH (VLO), logic input for loading block.

3

VCC2

Power supply for CH3, 4 and 5.

4

VLO-

Loading output (-).

5

VLO+

Loading output (+).

6

VO4+

Output pin (+) for channel 4.

7

VO4-

Output pin (-) for channel 4.

8

VO3+

Output pin (+) for channel 3.

9

VO3-

Output pin (-) for channel 3.

10

VO2+

Output pin (+) for channel 2.

11

VO2-

Output pin (-) for channel 2.

12

VO1+

Output pin (+) for channel 1.

13

VO1-

Output pin (-) for channel 1.

14

VCC1

Power supply for CH1, 2 (BTL).

15

VIN1

Input pin for channel 1.

16

VIN1-A

OP-AMP input AMP-A input pin (-).

17

VIN1+A

OP-AMP input AMP-A input pin (+).

18

VIN1-B

Input AMP-B input pin (-) for channel 1.

19

VIN1+B

Input AMP-B input pin (+)for channel 1.

20

VIN2

Input pin for channel 2, input AMP output.

21

VIN2-

Input pin (-) for channel 2.

22

VIN2+

Input pin (+) for channel 2.

23

VIN3

Input pin for channel 3, input AMP output.

24

VIN3-

Input pin (-) for channel 3.

25

VIN3+

Input pin (+) for channel 3.

26*

REG-IN

PNP transistor base connected.

27*

REG-OUT

5 V power output to which the PNP transistor collector connected.

28*

VREF-OUT

CH1 reference voltage output. Outputs internal VREF (2.5 V:TYP) or external VREF.

29

VIN1

Pin for changeover between input AMP-A/internal VREF (TYP2.5 V) and input AMP-B/external VREF.

(VREF)-SW

30

VREF-IN

Reference voltage applied pin.

31

VIN4+

Input pin (+) for channel 4.

32

VIN4-

Input pin (-) for channel 4.

33

VIN4

Input pin for channel 4, input AMP output.

34

MUTE

All BTL AMP output ON/OFF.

35

VCONT

Loading output voltage setting.

36

S-GND

Signal system GND.

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

* Center frame (FR) becomes GND for the power system (P-GND). Set this to the minimum potential together with S-GND.

– 40 –

FWD

Thermal Shutdown

Signal System GND

S-GND

VCONT

MUTE

VIN4

VIN4-

VIN4+

VREF-IN

VIN1(VREF)-SW

VREF-OUT(CH1)

RF

REG-OUT

REG-IN

VIN3+

VIN3-

VIN3

VIN2+

VIN2-

VIN2

VIN1+B

36

35

34

33

32

31

30

29

28

RF

27

26

25

24

23

22

21

20

19

UNit
Resistance:

Ω

MUTE

22k

VIN1/VREF-SW

Power System GND

5VREG (Extemal PNP)

22 k

11 k

22 k

11 k

22 k

11 k

11k

BTL-AMP Output

ON/OFF

(LOAD output voltage setting)

Input

Output Control

Level Shift

Level Shift

Level Shift

Level Shift

REV

VCC2

VLO-

VLO+

VO4+

VO4-

VO3+

VO3-

Power System GND

VO2+

VO2-

VO1+

VO1-

VCC1

AMP-A

AMP-B

VIN1

VIN1-A

VIN1+A

VIN1-B

RF

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

FR

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

VIN1 (VREF)-SW
[L]: Internal VREF  (2.5 V fixed)
[H]: Internal VREF

VIN1 (VREF)-SW
[L]: AMP-A
[H]: AMP-B