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1-9-1

H9741TEST

FIRMWARE is built-in program to operate DVD player.
To get rid of error when playing new software (disc)  in
the market, FIRMWARE version is updated. Perform
the following to update the FIRMWARE version.

1. Turn the power on and remove the disc on the tray.
2. To put the DVD player into version up mode, press

[9], [8], [7], [6], and [DIRECT SKIP/QUICK-FIND]
buttons on the remote control unit in that order. The
tray will open automatically.
Fig. a appears on the screen and Fig. b appears on
the VFD.

"*******" differ depending on the models.

Fig. a  Version Up Mode Screen

Fig. b  VFD in Version Up Mode

The DVD player can also enter the version up mode
with the tray open. In this case, Fig. a will be shown
on the screen while the tray is open.

3. Load the disc for version up.
4. The DVD player enters the F/W version up mode

automatically. Fig. c appears on the screen and Fig.
d appears on the VFD. If you enter the F/W for
different models, "Disc Error" will appear on the
screen, then the tray will open automatically.

Fig. c  Programming Mode Screen

"*******" differ depending on the models.

Fig. d  VFD in Programming Mode (Example)

The appearance shown in (*2) of Fig. c is described
as follows:

Appearance

No.

State

Reading...

Sending files into the memory

Erasing...

Erasing previous version data 

Programming...

1

2

3

Writing new version data

5. After programming is finished, the tray opens auto-

matically. Fig. e appears on the screen and the
checksum in (*3) of Fig. e appears on the VFD.
(Fig. f)

"*******" differ depending on the models.

Fig. e  Completed Program Mode Screen

Fig. f  VFD upon Finishing the Programming Mode (Example)

At this time, no buttons are available.

6. Remove the disc on the tray.
7. Unplug the AC cord from the AC outlet. Then plug it

again.

8. Turn the power on by pressing the [OPERATE]

button and the tray will close.

9. Press [1], [2], [3], [4], and [DISPLAY] buttons on the

remote control unit in that order.
Fig. g appears on the screen.

Fig. g

"*******" differ depending on the models.

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H9741TEST

10.Press [CLEAR/C-RESET] button on the remote con-

trol unit.
Fig. h appears on the screen.

"*******" differ depending on the models.

Fig. h

When "OK" appears on the screen, the factory
default will be set. Then the firmware renewal mode
is complete.

11.To exit this mode, press [OPERATE] button.

1-10-1

H9741TS

The power cannot be turned on.

Is the fuse normal?

Is normal state restored when once unplugged 
power cord is plugged again after several seconds.

Is the AL+5V line voltage normal?

Check each rectifying circuit of secondary circuit 
and service it if defective.

See FLOW CHART No.2  <The fuse blows out.>

Check for lead or shor-circuiting of primary
circuit component and service it if defective.
(Q1001, Q1003, T0011, D1001, D1002, D1003,
D1004, D1011, C1005, C2014)

Yes

Yes

Yes

No

No

No

The fuse blows out.

After servicing, replace the fuse.

Check the presence that the primary component
is leaking or shorted and service it if defective.

Check the presence that the rectifying diode or circuit 
is shorted in each rectifying circuit of secondary side 
and service it if defective.

When the output voltage fluctuates.

No

Yes

Does the secondary side photo coupler circuit
operate normally?

Check the circuit and service it if defective.
(IC1001, D1006, D1012, D1024)

Check the circuit and service it if defective.
(IC1001, Q1004, D1019)

When buzz sound can be heard in the vicinity of power circuit.

Check if there is short circuit on the rectifying diode and the circuit in each rectifying circuit of secondary side 
and service it if defective. (D013, D014, D016, D018, D1008, D1016, D1030, IC1002, IC1003, Q053, Q055, 
Q056, Q058, Q1052, Q1053, Q1055)

No

Yes

-FL is not outputted. 

Is the supply voltage of -30V fed to the anode of 
D018?

Check D018 and their periphery, and service it if 
defective.

Check for load circuit short-circuiting or leak, and 
service it if defective.

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H9741TS

No

Yes

Check D1008, L1012, C1007, C2015 and 
their periphery, and service it if defective.

EV+3.3V is not outputted. 

Is 4V voltage supplied to Pin(1) of IC1003?

Replace IC1003.

Is the "L" pulse (approximately 0V) inputted to 
the base of Q053?

Is the "H" pulse (approximately 5V) inputted to 
the base of Q054?

Is 5V voltage supplied to the 
Pin(37,99) of IC501.

Replace Q053.

Replace Q054.

Yes

No

Is 2.8V voltage supplied to Pin(1) of IC1002?

EV 1.2V is not outputted. 

Replace IC1002.

Check D1030, L1009, C1035, C1107, and their 
periphery, and service it if defective.

FLOW CHART NO.8
P-ON+5V (AL+5V) is not outputted. (P-ON+44V is outputted normally)

Is 5V voltage supplied to the collector of Q056?

Replace Q056.

No

No

Yes

Yes

Is the "H" pulse inputted to the base of Q056?

Check D016, L013, C017, C018, and their 
periphery, and service it if defective.

Check R058, R059, R060 and their periphery, 
and service it if defective.

FLOW CHART NO.7
AL+9V (AL+12V) is not outputted. (P-ON+44V is outputted normally)

Is 12V voltage supplied to the collector of Q055?

Replace Q055.

No

Yes

Yes

Check C014, D014, D017, L010, C015, and their 
periphery, and service it if defective.

FLOW CHART NO.6
P-ON+44V is not outputted. 

Is 44V voltage supplied to the emitter of Q053?

No

No

Is the "H" pulse (approximately 10V) inputted to 
the base of Q055?

Check D054, R055, and their periphery, 
and service it if defective.

No

Yes

Yes

Replace IC501.

Yes

Check AL+5V and 
Timer+5V line, and 
service it if defective.

No

No

Check D013, C013, and their periphery, and 
service it if defective.

Yes