Philips Senseo Twist HD7870/90 User manual

Published by Philips Consumer Lifestyle Printed in the Netherlands © Copyright reserved Subject to modification
ServiceManual
Philips Consumer Lifestyle
Senseo Twist
HD7870/90
HD7870/91
13/02
PRODUCT INFORMATION
• This product meets the requirements regarding
interference suppression on radio and TV.
• After the product has been repaired, it should function
properly and has to meet the safety requirements as
officially laid down at this moment.
TECHNICAL INFORMATION
• Voltage : 220 - 240 V
• Frequency : 50 Hz
• Power consumption : 1450 W
• Standby power : 0.25 W
• Color setting : Star white
• Weight : 2,05 Kg
• Dimensions H x W x D
- Appliance : 31,5 x 24,9 x 30,8 cm
- F-Box : 36 x 29 x 29,5 cm
• Length of cord : 80 cm
• Contents water reservoir : 930 cc (ml)
ACCESSORIES
• CRP475/01 1-cup pod holder Black
• HD5015/01 2-cup pod holder Black
• CRP855/01 Drip tray Lime yellow
• CRP862/01 Drip tray cover Black
• CRP874/01 Spout Star white
• CRP872/01 Collector
• CRP864/01 Water container small
• CRP867/01 Water container lid Star white
OPTIONAL (accessories)
• CRP865/01 Water container big (incl. bucket, optional
Britta Filter to be purchased separately)
• CRP866/01 Water container lid
(for Water container big)

HD7870/90 / HD7870/91
2-12
TECHNICAL INFORMATION
Volume adjustment
The PCB circuit board makes it possible to adjust the
volume output by means of pushing the one-cup and two-
cup user controls. How to adjust the volume output:
1. Make sure the boiler is lled properly, otherwise
perform ll procedure see DFU for instructions.
2. Switch appliance on and wait until the unit is ready to
brew.
3. Make sure a pod holder is placed, but without a Coffee
POD. (Only adjusting with plain water)
4. Place a cup on the drip tray cover and push the one-
cup button.
5. When the appliance has nished it is stabilized to
perform the volume adjustment.
6. Empty the cup, pod holder and push again for one cup
setting, measure the volume output with a graduated
beaker. In the table you can nd the requirements for
the minimum / maximum volume output cc/mL values
depending from the country version: (see Technical
specications)
7. Unplug the appliance from the mains.
8. Press the 1- and 2 cup button simultaneously and plug
the mains on.
9. When above step succeeded the LED will turn on
continuously.
10. Depending if the volume has to de- or increase you
have to push the one- or two cup button. Every time
you push the 1- or 2 cup button the LED will turn
off for 0.5 second (feedback to user) and the pump
time will be shortened or lengthened for 0.5 seconds
depending which button was pushed.
Pushing 1 cup button pump, time will be shorten
with 0.5 sec is approximately − 3.5 cc/mL (less coffee).
Pushing 2 cup button pump, time will be lengthen
with 0.5 sec is approximately + 3.5 cc/mL (more
coffee).
When the volume has to increase with 10 cc for
example, push the 2 cup button 3 times. The new value
will be stored when you switch the appliance off by
pushing the main switch (LED will turn off).
11. Turn appliance on again and brew one cup, measure the
volume. In case the volume is not within specication
repeat steps 6 - 11.
Note:
Changing a newly installed PCBA (by default delivered with
General version settings) into a French or Spanish setting
requires a decrease of the pump time by 2,5 seconds
(or ve pushes of the 1-cup button).

HD7870/90 / HD7870/91
3-12
Water
Supply
System
PCBA
NTC
UI PCBA
L
N
Pump
M
Water level
sensor
On/Off button
1-cup button
2-cup button
Toggle button
On/Off LED
1-cup LED
2-cup LED
Toggle LED
Regular LED
Strong LED
Memory LED
Descale LED
Buzzer
Communi
cation
Boiler
TCO
Fuse
Fuse
DISASSEMBLY- AND RE-ASSEMBLY ADVISE
Before you start dismantling! For your
safety be sure the plug is disconnected from
the mains! The product is designed for easy
access to the internal components. Make sure
that all accessories like tank, pod holder, drip
tray, spout and collector have been removed.
To remove the back cover (31):
Place the appliance facing its backside. Using a small
screwdriver remove screw cover (28) and unscrew both
screws A. You can now remove the back cover from the
appliance, please be aware that the Water level sensor (32)
is still attached to the back cover.
To remove the brewhead lid cover:
Place a screwdriver on the positions (see picture) and
work your way to the bottm. Please be aware that due
to the construction of the brewhead, the space inside is
limited. There is a chance Hose (a) will come off the pillar
when opening the brewhead (22).
!
Caution, the hinge spring on the back side of the appliance may
come out when the brewhead lid cover is being removed.
When reinstalling it, mind your ngers as this is a strong spring.
To remove the boiler (24):
Caution the boiler may still be hot!
• Remove the back cover.
• Disconnect the Hose (a) to the brewhead.
• Unhook the 3-way valve (27) from its seat on the
bottom of the brewhead.
• Unhook the boiler from the snap hook on the bottom of
the brewhead.
• Disconnect the following leads:
- (x) Boiler +
- (y) Boiler –
- (w) Earth
• Remove Hose (b) from the bottom side of the boiler.
The boiler will not drain as long as the 3-way valve is still
connected to the top.You can now safely remove the
boiler from the appliance.
Note:
Please note, after replacing the boiler the appliance has to be
restored to factory default. The lling procedure (cold ush),
known from the predecessor Senseo’s is no longer available
after the ush before rst use has been executed. When
the “restore to factory default” procedure is not carried out,
a new and empty boiler can be switched on, without having
the protection of the initial ush procedure, causing the
thermal fuses in the heating element to fail. After a boiler
replacement or drained system, carry out the “Boiler reset”
procedure! Then the initial ush procedure can be carried out.
SCHEMATICS

HD7870/90 / HD7870/91
4-12
DISASSEMBLY- AND RE-ASSEMBLY ADVISE
To remove the brewhead assembly:
• Remove the back cover.
• Remove the boiler, or simply lay it aside.
• Use both thumbs to push the brewhead upwards; you
may need to tilt the brewhead forward to remove it
from the appliance.
To remove the PCB assembly (34):
• Remove the back cover
• Remove the boiler
• Remove the brewhead assembly
• Remove the Main PCBA cover (33)
• Disconnect the following leads:
- NTC (at cable)
- Water level sensor (at cable)
- (z) UI PCBA (at cable)
- (s) Live
- (t) Pump
- (u) Neutral
- (v) Earth
• You can now unhook the snap hooks holding the PCBA
in place.
To access components located in the base of
the appliance (UI Panel, Pump,Water container
interface)
Open the Base:
• Remove the back cover
• Remove the boiler
• Remove the brewhead assembly
• Remove the Main PCBA cover (33)
• Remove the PCB assembly
• Unscrew the two screws (B) holding the Front housing
(23) in place. Remove the front housing
• Take the base of the appliance, using a small screw driver
start at the point indicated in the picture. Gently push
it between the tray panel assembly (36) and base plate
(41), the hidden snap should click open.
• Undo the two click connections visible on the bottom
side of the appliance.
• Now use the screwdriver to trace around the edge of
the tray panel assembly and base plate until you reach
the position of the drip tray. Repeat the process for the
other side. All snap hooks will come undone.
Please note that the water container interface is still
connected to the tray panel assembly and to the pump on the
base plate
To access the capacitive UI PCBA:
• Remove the back cover
• Remove the boiler
• Remove the brewhead assembly
• Remove the Main PCBA cover (33)
• Remove the PCB assembly
• Unscrew the two screws (B) holding the Front housing
(23) in place. Remove the front housing
• Open the Base
• Turn the Tray panel assembly upside down and open the
clicks of the UI PCBA Cover
• Here you will find:
- UI PCBA (38)
- UI Panel frame
- Light distributor
Descaling
Descaling is an important element in Senseo maintenance.
It should be done at least once every 3 months, up to
6times a Year! This will prolong the life of your appliance
and will guarantee optimal brewing results for a long time.
Use the correct descaling agent. Only citric acid-based
descalers are suitable for descaling the SENSEO®machine.
This type of descaler descales the appliance without
damaging it. For the correct amount, see the instructions
in the packaging of the descaler.
We advise you to use the special SENSEO®Descaler
(HD7011 or HD7012). Read the instructions on the
package of the descaling agent. Never use a descaling agent
based on mineral acids such as sulphuric acid, hydrochloric
acid, sulphamic acid and acetic acid (e.g. vinegar). These
descaling agents may damage your SENSEO®coffee
machine. Follow the steps in the section headed “Descale
the appliance” see DFU (Direction for Use manual).

HD7870/90 / HD7870/91
5-12
CALC
On/Off button
Regular LED
Toggle button
Strong LED
Calc LED
1-cup button
2-cup button
Please note, as the appliance is equipped with a
capacitive touch panel as a user interface, special
attention is required to be able to enter several service
modes. The capacitive buttons need 0,5 seconds to
initialize after the mains is connected. During this
timeslot the capacitive buttons must not be touched,
otherwise you will not be able to enter the service
modes.
Service mode
The appliance is equipped with a dedicated service mode.
The service mode enables you to carry out some settings
and tests.
REPAIR INSTRUCTION
Service mode
Only in case of a reset appliance you can check it’s current settings.
When connecting the appliance to the mains, you should see the On/Off light blinking very rapidly
for 0.5 seconds. For convenience the country selection and ME/HE selection are also being displayed.
1-cup button1 & 2-cup button2-cup button
Press the indicated button after connecting the mains
Blinking
Off
Blinking
Off
Blinking
General version
Boiler_empty_flag set
France / Spain version
Country
Selection
ME / HE
Selection
Mid-end
High-end
Sensor
On/Off button
1-cup button
2-cup button
Toggle button
NTC boiler
Water level sensor
-
-
On/Off LED
1-cup LED
2-cup LED
Toggle LED
Descale LED
Regular LED
Strong LED
Memory my cup LED
Button pressed
Button pressed
Button pressed
Button pressed
NTC error
Water present
<always on>
<always on>
Button released
Button released
Button released
Button released
NTC ok
Water low
-
-
LED LED on LED off
Settings
Sensor
&
LED test
Boiler
reset
Mid-End / High-End
Selection
(to enable Personal Coffee
Memory button)
Country Selection
(General / France-Spain)
Off
Settings
Manual pump
calibration
(Volume adjustment)

HD7870/90 / HD7870/91
6-12
BOILER RESET:
Boiler-reset-step 0 Entry to boiler reset mode:
1. Connect mains;
2. After 0.5 second and before 1.5 second operate the
1-cup button.
3. Release all switches.
SETTINGS:
Manual pump calibration
Please note that the volume adjustment to compensate for a
different country execution is now split in Volume adjustment
(calibrate Regular coffee cup volume) and the Country selection
(set the corresponding Strong coffee cup volume).
Service-step 0 Entry to calibration mode:
1. Connect mains;
2. After 0.5 second and before 1.5 second operate the
1-cup and 2-cup buttons simultaneously.
On/off, 1-cup and 2-cup LEDs will be switched ON.
3. Release all switches.
Service-step 1A Decrease calibration value:
1. Push (and release) the 1-cup button to decrease the
calibration value.
The On/Off LED will be OFF for 0.5 seconds.
2. Repeat step 1A.1 when required.
Service-step 1B Increase calibration value:
1. Push (and release) the 2-cup button to increase the
calibration value.
The On/Off LED will be OFF for 0.5 seconds.
2. Repeat step 1B.1 when required.
Service-step 2 Store calibration value:
1. Operate the On/Off button.
On/Off LED will blink fast for 1.0 seconds and the
calibration value is stored.
2. Release all switches.
The On/Off and 1-cup LED will be ON.
The memory LED will be OFF when ME is selected and
ON when HE is selected.
ME/HE selection
In this appliance ME (Mid-End) should be selected;
Strong LED off.
Service-step 3 Change HE/ME selection value:
1. Push (and release) the 1-cup button to change the
HE/ME value.
The strong LED will be OFF when ME is selected and
ON when HE is selected.
2. Repeat step 3.1 when required.
Service-step 4 Store HE/ME selection value:
1. Operate the On/Off button.
On/Off LED will blink fast for 1.0 seconds and the
HE/ME value is stored.
2. Release all switches.
The On/Off LED will be OFF.
Country selection
Service-step 5 Change country selection value:
1. Push (and release) the 2-cup button to change the
country value.
The regular LED will be OFF when a European selection
is selected and ON when a France selection is selected.
Note that when changing the country selection the pump
needs to be recalibrated again with a dened pump time.
2. Repeat step 5.1 when required.
Service-step 6 Store country selection value:
1. Operate the On/Off button.
On/Off LED will blink fast for 1.0 seconds and the
country selection value is stored.
2. Release all switches
The On/Off LED will be OFF.
When settings have been changed to change the coffee volume
(Manual pump calibration or Country selection), the appliance
needs to be unplugged from the mains before the new settings
will take effect.
REPAIR INSTRUCTION

HD7870/90 / HD7870/91
7-12
SENSOR AND LED TEST
To validate the assembly and electrical correctness of an
appliance, especially during testing and debugging phase,
a sensor and LED test is very useful. Please keep in mind
that it is not an automated test and only intended as
indication.
Service-step 0 Entry to test mode:
1. Connect mains;
2. After 0.5 second and before 1.5 second operate the
2-cup button.
3. Release all switches.
4. All LEDs will be ON for 1.0 seconds and after that
switch to OFF again.
Service-step 1 Sensor identication:
1. Manually operate a button or sensor.
The related LED - refer to the table on p.4 -
will be ON.
2. Release the button or sensor.
The related LED - refer to the table on p.4 -
will be OFF.
Service-step 2 End test
1. Disconnect mains end test program
PCBA REPLACEMENT
When there is the need for a PCBA replace-
ment the default setting of the PCBA will be:
• Boiler empty flag = SET
• ME/HE selection = Mid end
• Country selection = General version
Please follow below way of working.
Start
End
Manual pump
calibration
(see previous page)
Country
selection
(see previous page)
ME / HE
selection
(see previous page)
(HD7872 / HD7873 only)
*) you can enable the Personal coffee
memory function on a HD7870
appliance, but the LED on the User
Interface will not be visible.
Sets the default
Regular coffee cup
volume
Sets the
corresponding
Strong coffee cup
volume
Enables the Personal
coffee memory
function*
!
REPAIR INSTRUCTION

HD7870/90 / HD7870/91
8-12
PARTS LIST
Pos Service code Description Remark
1
2
3
4
5
4222 259 44211
4222 259 44221
4222 247 67501
4222 259 52962
4222 247 67751
Padholder assy 1
Padholder assy 2
Collector
Spout assy complete
Driptray cover
Deep black
Deep black
Deep black
Star white
Deep black
6
7
8
14
15
4222 247 67491
4222 259 56611
4222 247 67671
4222 247 67631
4222 247 67571
Driptray
Water container assy complete
Water container lid
Lid window
Lid cover
Lime Yellow
Transparent Papillion
Star white
Lime Yellow
Star white
16
17
18
19
20
4222 247 67582
4222 247 67591
4222 240 01413
4222 247 06814
4222 240 05991
Lever
Push rod
Slider spring
Brew chamber seal
Ejector pin
Star white
21
22
23
24
25
4222 247 41922
4222 259 56781
4222 259 56591
4222 259 52091
4222 247 05134
Distribution disk
Brew chamber assy
Front housing
Boiler assy
NTC O-ring
Lime Yellow Papillion
Star white printed
TCO V7.0 - 230 V
26
27
28
29
30
4222 259 47301
4222 259 54481
4222 259 53641
4222 247 67441
4222 247 67461
NTC assy
Valve assy
Screw cover
Valve outlet
Water container catch
Lynx (Grivory)
Star white
Star white
Star white
31
32
33
34
35
4222 247 67452
4222 259 51871
4222 247 67431
4222 259 51853
4222 247 06591
Back housing
Water level sensor
Main PCBA cover
Main PCBA assy
Pressure hose
Star white
36
37
38
39
40
4222 259 52912
4222 248 56621
4222 259 52833
4222 247 67721
4222 259 37244
Tray panel assy complete
UI sticker
UI PCBA capacitive
UI PCBA Cover
Pump
Mystery black
ME
ULKA HF 230 V ~50 Hz
41
42
4222 247 67401
4213 247 05256
Base plate
Foot
Lime Yellow

HD7870/90 / HD7870/91
9-12
5
6
1
2
8
7
3
4
EXPLODED VIEW

HD7870/90 / HD7870/91
10-12
14
16
17
18
15
a
19
20
21
EXPLODED VIEW

HD7870/90 / HD7870/91
11-12
22
26
25
24
23 B
B
A
b
z
t
s
uv
yx
w
y
x
w
a
33
32
31
28
27
29
30
34
A
EXPLODED VIEW

HD7870/90 / HD7870/91
12-12
AUTO OFF
coffee strength select
CALC
uv
ts
z
35
39
41
42
40
38
37 36
b
c
c
C
C
EXPLODED VIEW