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

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.

5-5

DPP-SV77 V1

n
Download the latest firmware and obtain the technical memo from the following URL.

URL (Japanese)

→

 http://43.7.166.43/?lang=jp&uid=

URL (English)

→

 http://43.7.166.43/?lang=en&uid=

The firmware of the DDP-SV77 is stored in IC102 (flash memory) on the DK-43 board.
The firmware can be upgraded using a PC card by employing flash memory for program storage memory.

Upgrade when requiring the improvement in a function (the version up of firmware).

n
Be sure to upgrade the firmware version in the following cases.
. After replacing the DK-43 board.
. After replacing IC102 on the DK-43 board.

1.

Copy the latest firmware (HOPE3.mot) to the directory ¥SONY¥DPPSV of a memory stick or a PC card.
n
For the PC card, the memory stick in which a memory stick PC card adaptor is used causes no problem.

2.

Insert the PC card containing the latest firmware into the PC card slot of a printer and connect the power cord to the

printer. (The power LED then lights in red.)

3.

Press the  POWER  key while pressing the  MENU  and  PRINT  keys simultaneously.

4.

Release the keys when the LED of the personal computer lights and the buzzer “beeps”.

5.

The firmware is upgraded in the order below.

(1) “ALL SELECT” LED blinks.

A file is in the read state from the memory stick or PC card.

(2) “Memory stick”, “PC card”, and “personal computer” LEDs blink at long intervals.

The flash memory is in the clear state.

(3) “Memory stick”, “PC card”, and “personal computer” LEDs blink at short intervals.

The flash memory is in the write state.

(4) “Memory stick”, “PC card”, and “personal computer” LEDs blink at normal intervals.

The flash memory is in the verification state.

(5) “PRINT” LED blink alternately.  Upgrading is completed.

n
Do not pull out the power cord during upgrading.

6.

After completion is confirmed, disconnect the power cord from the printer and take out the memory stick or PC card

from the printer.

7.

Restart the printer in the service mode.

8.

After the “Check Sum value” is displayed on the monitor screen, confirm that the value is the same as for a technical
memo.  The Check Sum is displayed in the lowest row of the menu screen of the service mode.

DPP-SV77 V1

After correcting the original service problem,
perform the following safety checks before
releasing the set to the customer :

Check the metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC
leakage. Check leakage as described below.

The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to
any exposed metal part having a return to
chassis, must not exceed 3.5 mA. Leakage
current can be measured by any one of three
methods.

1. A commercial leakage tester, such as the

Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. The

Data Precision 245 digital multimeter is
suitable for this job.

3. Measuring the voltage drop across a resistor

by means of a VOM or battery-operated AC
voltmeter. The “limit” indication is 5.25 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM
that is suitable. Nearly all battery operated
digital multimeters that have a 20 V AC range
are suitable. (See Fig. A)

To Exposed Metal
Parts on Set

Fig A. Using an AC voltmeter to check AC leakage.

AC
voltmeter
(5.25V)

Earth Ground

0.15 

µ

F

1.5 k

Z

Printed in Japan

Sony Corporation

2003. 3 22

B&P Company

©2001

DPP-SV77 (UC, CE) E

9-955-297-12