DOWNLOAD Sony DPP-SV77 Service Manual ↓ Size: 3.36 MB | Pages: 79 in PDF or view online for FREE

5-1

DPP-SV77 V1

Electrical troubles are described below.

Trouble: No video signal is output. (No monitor screen is displayed.)
Remedy:

. Confirm flat cable FFC (between the DK-43 and MD-43 boards).
. Confirm IC202 on the DK-43 board and the peripheral circuit.
. Confirm that the input selector key is set to the memory stick or PC card.
. Confirm that the video output is not see to <off> in the menu screen.
n
A video signal cannot be output when the input selector key is set to the personal computer.
Confirm using the input selector key of the main unit.

Trouble: No memory stick image can be read.

Remedy:

. Confirm CN181 on the DK-43 board and the peripheral circuit.
. Confirm IC101 on the DK-43 board and the peripheral circuit.

Trouble: No PC card image can be read.

Remedy:

. Confirm CN254 on the DK-43 board and the peripheral circuit.
. Confirm IC251 on the DK-43 board and the peripheral circuit.

Trouble: A printer is not recognized by the personal computer.

Remedy:

. Confirm IC951 on the MD-43 board and the peripheral circuit.
. Confirm IC101 on the DK-43 board and the peripheral circuit.
. Confirm flat cable FFC (between the DK-43 and MD-43 boards).

Trouble: The print color is not proper and the image is not normal.
Remedy:

. Make a gray print in “TEST6” of the service mode for confirmation.

(Refer to “4-5. Density Adjustment During Thermal Head Replacement”.)

. Confirm CN253 on the DK-41 board and the peripheral circuit.
. Confirm flat cable FFC (between DK-43 board and thermal head).
. Confirm “LCD CONTRAST” of the service mode.

Trouble: No image appears on the LCD.

Remedy:

. Confirm flexible wiring board between the LCD and the main unit.
. Confirm IC501 on the DK-43 board and the peripheral circuit.
. Confirm CN503 on the DK-43 board and the peripheral circuit.
. Confirm the liquid crystal displaying module and inverter unit.

Trouble: Touch panel does not operate.

Remedy:

. Confirm touch panel.
. Confirm the TP-43 board.
. Confirm flexible wiring board between the LCD and the main unit.

5-2

DPP-SV77 V1

Current STATUS
00, 00, 00, 00 : 00, 00, 00, 00
00, 00, 00, 00 : 00, 00, 00, 00

Last STATUS
00, 00, 00, 00 : 00, 00, 00, 00
00, 00, 00, 00 : 00, 00, 00, 00

Err 1
00, 00, 00, 00 : 00, 00, 00, 00
00, 00, 00, 00 : 00, 00, 00, 00

Err 2
00, 00, 00, 00 : 00, 00, 00, 00
00, 00, 00, 00 : 00, 00, 00, 00

PRINT STATUS

2

1

In this unit, the “status of mechanical deck” can be displayed in the service mode.
The direct touch of a touch-pen on the LCD is referred to as “tap”.

1.

Turn on the power while pressing the  DPOF  key.

2.

Release the  DPOF  key when the service mode screen appears.

Selects either of the following method to display the status of the mechanical deck.
. Top <PRINTER STATUS>
. Move the selection frame using the DPOF key (forward) and the ALL Select key (backward), and press

the print key.

Test3: Displays the status of a mechanical deck.
n
In this mode, the value cannot be changed.
Current STATUS: Displays the current status.

LAST STATUS:

Displays the status obtained when the power was turned off previously.

ERR1:

Displays the status obtained when an error occurs.

ERR2:

Displays the status obtained when an error occurs. (The one with a greater number of
total printed sheets will be valid.)

5-3

DPP-SV77 V1

1 Error & ribbon code

Name

PES4

PES3

PES2

PES1

PES0

RM2

RM1

RM0

Contents

Print error status

Ribbon code

Print error status

0

0

0

0

0

0

No error

0

0

1

0

0

4

No ribbon

0

0

1

0

1

5

Ribbon completed

0

0

1

1

1

7

Ribbon code error

0

1

0

0

0

8

No paper

0

1

0

0

1

9

Paper completed

0

1

0

1

0

10

Paper length error (Long)

0

1

0

1

1

11

Paper length error (Short)

0

1

1

0

0

12

Remaining paper

1

0

0

0

0

16

PE error (Jamming)

1

0

0

0

1

17

JD error (Jamming)

1

0

0

1

0

18

Head error

1

0

0

1

1

19

Mode motor error (Mode change error)

1

0

1

0

0

20

Stepping motor error

1

0

1

0

1

21

Transition error

1

0

1

1

0

22

Ribbon error

1

1

1

1

1

31

Others

Ribbon code

0

0

0

0

Reserved

0

0

1

1

Reserved

0

1

0

2

Reserved

0

1

1

3

Reserved

1

0

0

4

Half

1

0

1

5

Long

1

1

0

6

Reserved

1

1

1

7

Reserved

2 Total number of printed sheets

0

1

1

1

1

0

30

Remedy for ribbon jamming

0

1

1

1

1

1

31

From M0 to M1

0

0

1

0

1

0

10

Paper return 2 or paper return 3

5-4

DPP-SV77 V1

Paper feed failure due to a wear of paper

Replace the K frame assembly.

feed mechanical block.

Paper is not set in the correct position of

Set paper in the correct position.

the paper feed tray.

Detection error of the PE sensor

Check the connection of the PE sensor connector.

Replace the PE-43 board.

Paper is not set in the correct position of

Set paper in the correct position.

the paper feed tray.

Detection error of the JD sensor

Check the connection of the JD sensor connector.

Replace the JD-43 board.

Paper is ejected as blank paper.

Mismatch between paper and ribbon

Use matching paper and ribbon.

Paper is torn off along perforation before
printing.

Jamming of ink ribbon or paper

Used ribbon was rewound and reused.

After removing the ink ribbon, replace the T-reel

occurs in the unit.

Printed paper was reused.

assembly (because the T-reel assembly may be

Ribbon cartridge cannot be

Paper other than specified was used.

damaged due to jamming).

removed.

Upgrade the firmware to the latest version.

Troubles resulting from specific parts

Refer to the technical memo

White spots or hitting traces

Foreign substance adheres to the roller.

Remove the mechanical deck block and perform the

appear at pitch intervals in the

cleaning of roller.

printing direction, etc.

18.8 mm interval: Pinch roller
20.4 mm interval: Capstan roller
37.7 mm interval: Platen roller
Remove the foreign substance adhered to the
capstan roller using a gummed tape, etc.
Remove the foreign substance adhered to the pinch
roller and platen roller using a cloth dampened with
ethanol.

White streaks or scratches

Foreign substance adheres to the surface

Remove the thermal head and remove the foreign

appear in the printing direction.

of thermal head.

substance adhered to the surface using a cloth
dampened with ethanol.

“No paper” is displayed although
the paper is set in the paper feed
tray.

Multiple sheets of paper are fed
and jammed as blank paper.

A sheet of paper is fed and
jammed in the unit as blank paper.