Sanyo DVP-P1EX, DVP-P1, DVP-P1C Service Manual
SERVICE MANUAL
FILE NO.
Digital Photo Printer
Contents
1. FEATURES ................................................................ 2
2. OUTLINE OF CIRCUIT DESCRIPTION .................... 2
3. DISASSEMBLY .......................................................... 6
4. ELECTRICAL ADJUSTMENT .................................. 10
5. PARTS LIST............................................................. 11
CIRCUIT DIAGRAMS &
PRINTED WIRING BOARDS ...................................... C1
DVP-P1EX
(Product Code : 126 306 02)
(Europe)
(PAL General)
DVP-P1
(Product Code : 126 306 01)
(U.S.A)
(Canada)
(NTSC General)
DVP-P1C
(Product Code : 126 306 03)
(China)
Please see other materials with Reference
number given in table below.
Materials
Mechanism
Manual
Model No.
DVP-P1EX
DVP-P1
DVP-P1C
Reference No.
MM5310544
The components designated by a symbol ( ! ) in this schematic diagram designates components whose value are of
special significance to product safety. Should any component designated by a symbol need to be replaced, use only the part
designated in the Parts List. Do not deviate from the resistance, wattage, and voltage ratings shown.
CAUTION : Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
NOTE : 1. Parts order must contain model number, part number, and description.
2. Substitute parts may be supplied as the service parts.
3. N. S. P. : Not available as service parts.
Design and specification are subject to change without notice.
SVF01/EX, U, C
PRODUCT SAFETY NOTICE
REFERENCE No. SM5310524
1.FEATURES
This printer is a type of thermal transfer printer, and it prints
by subliminating ink through the print head heating an ink
ribbon to which solid ink has been applied and having it
adhere to special paper coated with a polyester resin.
Fine changes can be made in the printing density by control-
ling the heat applied, and it is possible to present continuous
tones like those in photographs.
In addition, since a system of attachment to a platen roller
and rotation is used instead of a system of moving the paper
back and forth, there is no time lost in reversal of the paper
feed, and complete printing to the edges is possible because
of the attachment of the paper to the platen roller.
Furthermore, PictBridge is used, so simple operations can be
implemented without a PC.
2.OUTLINE OF CIRCUIT DESCRIPTION
2-1.Power supply section
A mechanical switch is used for the power switch, and the con-
figuration is such that it a reset is carried out when the power is
turned ON/OFF.
The necessary voltages are created by a DC-DC converter from
the 24 V DC supplied by the AC adapter.
The 24 V for the print head is only supplied to the head during
printing with the turning ON of a FET by the head-on signal. In
addition, since the print head voltage affects the density of print-
ing, the voltage changes are controlled within 3%.
The D-D converter IC supplies 12 V to the motor system and 5
V to the head driver and USB systems.
From the 5 V created by the D-D converter IC, 3.3 V is created
by a series regulator, and 1.9 V is created from that 3.3 V by a
series regulator.
2-2.Motor driver section
IC 951 is a driver for the stepping motor that drives the platen
roller.
If there is an abnormality in the rotation of the stepping motor,
printing irregularities will occur.
The stepping motor has 24 V drive.
IC 952 is the ink ribbon driver, and that drives the ink rev and in
the ink cassette.
They ink ribbon motor has 12 V drive.
IC 953 is the head position motor driver, and rotates to put the
cam into various positions for standby, paper ejection, paper
and ribbon feed, paper supply, and printing.
The head position motor has 12 V drive.
12 V is applied without alteration to the fan drive, and it is turned
ON and OFF by a FET.
2-3.Main circuit
IC 101 is the CPU, and IC 102 is ASIC.
The CPU clock of 16.67 MHz is created by X11101, and it is
increased to 133.67 MHz within the CPU for operation.
The BUS clock is 66 MHz, and the ASIC operates on that 66
MHz.
For CPU resetting, IC 106 has a threshold of 2.7 V, and when it
falls below 2.7 V, a reset is performed.
Flash memory IC 121 uses 1 MB, and programs and supple-
mentary data are stored in it.
Image data broken down into the cyan, magenta and yellow
components for printing is stored in SDRAM IC 103 and IC
104.
It is set up to be able to handle data for up to 12,000,000 pixels.
The ASIC is composed of a card interface section, print engine
section and JPEG expansion section.
IC 151 is the USB host, and internally it multiplies 12 MHz to 48
MHz for operation.
IC 153 is for current limiting of the USB terminal power supply.
− 2 −
2-4.Thermal print head
The print head has 1280 dots, and is driven by 10 drivers.
yellow
magenta
cyan
OP
yellow
2-5.Sensor section
Pins 1-5 of CN161 are used for the head position sensor.
Chattering is prevented by the Schmidt buffer from CN161.
The sensors are the transmission type, and the cutouts in the
detection part of the head position cam are detected.
When the power supply is turned on, initial operations are car-
ried out.
In the initial operations, the cam is moved 40 degrees (to a
point between paper/ribbon feed and paper supply), paper jams,
etc., detected; if normal, it returns to standby, and if paper is
jammed, it ejects it.
Table 1 shows the relationship between mode and sensor out-
put.
When printing ends normally in the normal manner for comple-
tion, it returns to the standby position.
PAPER
SUP-
PRINT
PLY
L
H
L
L
L
H
H
H
L
S1
S2
S3
STANDBY
H
H
H
PAPER
EJECT
H
L
L
Table 1
PAPER/
RIBBON
FEED
SENSOR1
SENSOR2
marke
r
marke
marke
r
marke
r
marke
r
r
Fig. 1
Since the detected signal is detected by the reflection sensor
from the ink ribbon, the waveform is indeterminate, and there
may be erroneous operations if it remains as is, so waveform
shaping is performed by a comparator (IC 161).
The arrows displayed on the ink ribbon are for taking up the
slack in the ribbon, and the direction of ribbon winding is in the
order yellow, magenta, cyan and OP in the opposite direction
of the arrows.
CN164 is the paper top sensor.
It is a reflection sensor, and it carries out paper top detection
and detection of the absence or presence of paper.
Along with detecting the top of the paper, it forms the basis for
determining how many pulses after thaSince the top of the pa-
per cannot be detected when there is no paper, this also in-
cludes detection of the absence or presence of paper.
CN162 is the ribbon encoding sensor.
It is a transmission sensor, and it detects the ribbon feed; wave-
form shaping is carried out in IC 163.
CN163 is the ribbon top sensor.
It is a reflection sensor, and the start of a color is detected by a
certain black marker on the ribbon. The light generated by the
ribbon sensor is reflected by the light reflecting part of the rib-
bon cassette, and the photo transistor is turned ON, but when
the marker passes by, it absorbs the light, so even if there is
light, it is not reflected and the photo transistor turns OFF, send-
ing out signal H. The markers are placed at the beginning of
each print color, but the manner in which the marker is set is
different for yellow and the other parts (magenta, cyan, OP).
Since this printer prints in the order of yellow, magenta, cyan
and OP, yellow is detected for the starting of printing.
Therefore, the markers and the sensors are positioned so that
yellow is detected by sensor 2, and the others are detected by
sensor 1.
CN165 is the paper eject sensor.
Detection is carried out with the turning ON/OFF of the switch.
− 3 −
2-6. Flowchart
Print start
Paper feed
Error check
Paper top detection
Error check
Paper supply
Paper top detection
Print of yellow
Error message indicate
Turn on a LED
Ink ribbon feed
Error check
Yellow top detection
Paper feed
Error check
Paper top detection
Ink ribbon feed
Error check
Magenta top detection
Print of magenta
− 4 −
Paper feed
Ink ribbon feed
Error check
Paper top detection
Paper feed
Error check
Paper top detection
Error check
Cyan top detection
Print of cyan
Ink ribbon feed
Error check
OP top detection
Print of OP
Error message indicate
Turn on a LED
Paper eject
Error check
Print end
− 5 −
Error message indicate
Turn on a LED
Error message indicate
Turn on a LED
3. DISASSEMBLY
3-1. REMOVAL OF CABINET AND TRAY PHOTO
1. Two screws 3 x 10
2. Cabinet
3. Three screws 3 x 10
4. Tray photo
5. Two screws 2.6 x 4
6. FPC
7. Shield A
8. FPC
9. Button power
3
4
5
A
B
7
6
8
1
B
2
A
9
– 6 –
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