Sony DPP-EX7 Service Manual ▷ View online
1-3
DPP-EX7 V1
1-3. Sensor Arrangement and Functional Description
MD-45 board
Ref.
Name
Type
Function
PH903, 904
Mode position sensor
Reflection type
x
2
Detects the position of a DC motor.
PH901, 902
Ribbon code sensor
Reflection type
x
2
Detects the type of a ribbon.
D901
Ribbon mark sensor
Transmissive type (LED)
Detects the mark of each ribbon color.
PH905
Ribbon in-sensor
Reflection type
x
1
Detects the existence of a ribbon
cassette.
cassette.
JD-45 board
Ref.
Name
Type
Function
PH1020
Jamming dead sensor
Reflection type
x
1
Detects the paper position.
Detects the paper type.
PH901
D901
PH902
PH905
PH904
PH903
MD-45 board (Side A)
PH1020
JD-45 board (Side A)
1-4
DPP-EX7 V1
PE-45 board
Ref.
Name
Type
Function
PH1030
Paper edge sensor
Reflection type
x
1
Detects the paper position.
Detects the paper type.
RM-45 board
Ref.
Name
Type
Function
Q1040
Ribbon mark sensor
Transmissive type
Detects the mark of each ribbon color.
(photo transistor)
PE-45 board (Side A)
PH1030
RM-45 board (Side A)
Q1040
2-1
DPP-EX7 V1
Section 2
Replacement of Main Parts
Flexible flat cables
DK-45 board
CN251
CN255
CN253
CN252
Upper DK
shield case
shield case
Ferrite holder
BVTP
2.6
2.6
x
8
BVTP
2.6
2.6
x
8
BTP
2.6
2.6
x
10
A
BVTT
2.6
2.6
x
5
A
B
B
Solders
PC/MS guide
assembly
assembly
DK-45 board
Lower DK shield case
Solders
Solders
Solder
2-1. Replacement of Board
2-1-1. DK-45 Board
1.
Remove the upper cabinet assembly. (Refer to Section
1-2-1.)
1-2-1.)
2.
Disconnect the four flexible flat cables from the
connectors (CN251, CN252, CN253 and CN255) on
connectors (CN251, CN252, CN253 and CN255) on
the DK-45 board.
3.
Remove the three screws (BVTP 2.6
x8), two screws
(BVTT 2.6
x5) and one screw (BTP 2.6x10), then
raise the ferrite holder in the direction indicated by the
arrow and remove the DK-45 board.
4.
Remove the PC/MS guide assembly from the DK-45
board.
5.
Remove the two solders, then remove the upper DK
shield case from the DK-45 board.
6.
Remove the five solders, then remove the lower DK
shield case from the DK-45 board.
shield case from the DK-45 board.
7.
Install the DK-45 board in the reverse order of steps 1
to 6.
to 6.
2-2
DPP-EX7 V1
BVTP
2.6
2.6
x
6
Flexible flat cable
PW-45 board
CN1301
2-1-2. PW-45 Board
1.
Remove the upper cabinet assembly. (Refer to Section
1-2-1.)
1-2-1.)
2.
Disconnect one flexible flat cable from the connector
(CN1301) on the PW-45 board.
(CN1301) on the PW-45 board.
3.
Remove one screw, then remove the PW-45 board.
4.
Install the PW-45 board in the reverse order of steps 1
to 3.
Ferrite holder
Harnesses
Harnesses
Harnesses
Flexible flat cables
MD-45 board
MD-45 board (Side B)
Terminal
plate
plate
Hook
BVTT
2.6
x
5
CN901
CN903 CN904
CN905
CN906
CN908
CN909
CN910
CN911
2-1-3. MD-45 Board
1.
Remove the upper cabinet assembly. (Refer to Section
1-2-1.)
1-2-1.)
2.
Remove the DK-45 board. (Refer to Section 2-1-1.)
3.
Disconnect the seven harnesses from the connectors
(CN901, CN903-906, CN908 and CN909) on the MD-
45 board and two flexible flat cables from the
45 board and two flexible flat cables from the
connectors (CN910 and CN911) on the MD-45 board.
4.
Raise the ferrite holder and remove the three screws,
then remove the MD-45 board.
5.
Remove one hook, then remove the terminal plate.
6.
Install the MD-45 board in the reverse order of steps 1
to 5.
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