Puritan Bennett
Puritan Bennet 800 Series Ventilators
840 Ventilator System Theory of Operation & Parts List
Theory of Operation & Parts List
32 Pages
Preview
Page 1
Foldout pages for: Theory of Operation & Parts List Section 2 Figure 2-42. Electrical system block diagram (10.4-inch GUI-Trending-enabled CPU PCB shown) on page 3 Figure 2-43. Electrical system block diagram (10.4-inch GUI-Non-Trendingenabled CPU PCB shown) on page 5 Figure 2-44. Electrical system block diagram (9.4-inch GUI-Trending-enabled CPU PCB shown) on page 7 Figure 2-45. Electrical system block diagram (older 9.4-inch GUI shown) on page 9 Figure 2-86. Puritan Bennett™ 840 Ventilator System interconnect diagram – Compresor unit on page 11
Section 9 Figure 9-1. 840 Ventilator System patient system and accessories on page 13 Figure 9-10. 10.4-inch GUI assembly with TE GUI CPU PCB on page 15 Figure 9-11. 10.4-inch GUI assembly on page 17 Figure 9-15. 9.4-inch GUI assembly on page 19 Figure 9-18. Breath delivery unit (BDU) on page 21 Figure 9-23. BDU cover assembly on page 23 Figure 9-24. BDU chassis assembly on page 25 Figure 9-26. 806 Compressor unit on page 27 Figure 9-28. Compressor unit enclosure assembly on page 29 Figure 9-29. Compressor plenum assembly on page 31
Theory of Operation
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2-2
Puritan Bennett™ 840 Ventilator System Service Manual
Theory of Operation
INSPIRATORY MODULE
GUI
GUI CPU PCB
TO LOWER LCD PANEL
P1
P2 J7
UPPER LCD PANEL LOWER LCD PANEL
RS-232
J19
COMPACT FLASH REMOTE ALARM
P3 J8 DIGITAL SIGNALS
9 LEDS DATA KEY
FROM GUI CPU PCB J2
P9 SAFETY VALVE P6
P2
AIR PSOL (PSOL2)
PA
J20
MOTHERBOARD
INSPIRATORY ELECTRONICS PCB
GUI LED PCB
PWR
TEST
P1
J2 BACKLIGHT INVERTER PCBs J11
TO UPPER LCD PANEL
BD CPU P1 PCB
J3
KEYBD/KNOB
FROM GUI CPU PCB J11
P5
PI
OXYGEN PSOL (PSOL1)
LCD FLEX INSP PRES XDUCER A/Z SOL (SOL1)
P10
CIRCUITS
J5 TOUCH FRAME PCB
P3
OXYGEN FLOW SENSOR (Q1)
P4
AIR FLOW SENSOR (Q2)
J12 J1 AI PCB
P9 J9
PWR & ANALOG SIGNALS P10 J10 J6 DIGITAL 2 LEDS SIGNALS P5 J13
P1
BD +5 V, BD +12 V, GUI +5 V, GUI +12 V, -15 V, +15 V, CTRL/STATUS
J11
P7
BPS BPS PCB
PTS 2000
J3
J2
+36 V
BDU LED PCB
BATTERY CHARGED
J3
J1
OXYGEN PRESS SWITCH (PS1)
POWER SUPPLY
AIR PRESS SWITCH (PS2)
I/O CONTROL J1 F1
PWR SW (S1)
BATTERY PACK F1
J2
BATTERY CHARGING
P1 OXYGEN SENSOR
S1
EXH MODULE HUMIDIFIER OUTLET EXH PRESS XDUCER A/Z SOL (SOL2)
AC PANEL COMPRESSOR UNIT
J4
EXH HEATER (EXH HTR) J1 UNLOADING SOLENOID (SOL3)
EXH FLOW SENSOR (Q3)
J5
K1 RELAY
J6
J1
CB2
CB1
TH1
J2
EXH VALVE (EV)
BLU BRN
AC FILTER PCB
E4
BLU BRN
E3
J3 EQUIPOTENTIALITY CONNECTOR
J4
COMP MOTOR
EXH PCB TRANSDUCER PE
COMPRESSOR PCB PC
100-120 V ONLY
POWER RELAY
FAN 1
FAN 2
STARTING CAPACITOR
Figure 2-42. Electrical system block diagram (10.4-inch GUI-Trending-enabled CPU PCB shown)
Puritan Bennett™ 840 Ventilator System Service Manual
2-55
Theory of Operation
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2-56
Puritan Bennett™ 840 Ventilator System Service Manual
Theory of Operation
INSPIRATORY MODULE
GUI
J3
GUI CPU PCB
P1
INSPIRATORY ELECTRONICS PCB
GUI LED PCB J2 TO UPPER LCD PANEL
BACKLIGHT INVERTER J11 PCBs
TO LOWER LCD PANEL
P1 RS-232 FLEX CIRCUIT
P2 J7 PWR DIGITAL SIGNALS
9 LEDS DATA KEY
KEYBD/KNOB
AIR PSOL (PSOL2)
PA P5
PI
OXYGEN PSOL (PSOL1) INSP PRES XDUCER A/Z SOL (SOL1)
P10
REMOTE ALARM
P3 J8 TEST
P6
LCD FLEX CIRCUITS
J19
J20
MOTHERBOARD
SAFETY VALVE
P2
FROM GUI CPU PCB J11
LOWER LCD PANEL
J7
BD CPU P1 PCB
FROM GUI CPU PCB J2
UPPER LCD PANEL
P9
J5 TOUCH FRAME PCB
P3
OXYGEN FLOW SENSOR (Q1)
P4
AIR FLOW SENSOR (Q2)
J12 J1 AI PCB
P9 J9
PWR & ANALOG SIGNALS J10 P10 J6 DIGITAL 2 LEDS SIGNALS P5 J13
P1
BD +5 V, BD +12 V, GUI +5 V, GUI +12 V, -15 V, +15 V, CTRL/STATUS
J11
P7
BPS BPS PCB
PTS 2000
J3
J2
+36 V
BDU LED PCB
BATTERY CHARGED
J3
J1
OXYGEN PRESS SWITCH (PS1)
POWER SUPPLY
AIR PRESS SWITCH (PS2)
I/O CONTROL J1 F1
PWR SW (S1)
BATTERY PACK F1
J2
BATTERY CHARGING
P1 OXYGEN SENSOR S1
EXH MODULE HUMIDIFIER OUTLET EXH PRESS XDUCER A/Z SOL (SOL2)
AC PANEL COMPRESSOR UNIT
J4
EXH HEATER (EXH HTR) J1 UNLOADING SOLENOID (SOL3)
EXH FLOW SENSOR (Q3)
J5
J1
CB2
BLU BRN
AC FILTER PCB
E4
BLU BRN
E3
J3 EQUIPOTENTIALITY CONNECTOR
J4
COMP MOTOR
EXH PCB TRANSDUCER PE
J6
CB1
TH1
J2
EXH VALVE (EV)
K1 RELAY
PC
100-120 V ONLY
POWER RELAY
COMPRESSOR PCB
FAN 1
FAN 2
STARTING CAPACITOR
Figure 2-43. Electrical system block diagram (10.4-inch GUI-Non-Trending-enabled CPU PCB shown)
Puritan Bennett™ 840 Ventilator System Service Manual
2-57
Theory of Operation
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2-58
Puritan Bennett™ 840 Ventilator System Service Manual
Theory of Operation
INSPIRATORY MODULE
GUI
GUI CPU PCB
J3
P1 GUI LED PCB
TO UPPER LCD PANEL
J4 J6
TO LOWER LCD PANEL
J12 J15
J7
J5
BACKLIGHT INVERTER J3 PCB
P1 RS-232
BD CPU P1 PCB
P2 J7
MOTHERBOARD
DIGITAL SIGNALS
9 LEDS DATA KEY
KEYBD/KNOB
SAFETY VALVE P6
P2
AIR PSOL (PSOL2) P5
PI
COLOR I/O PCBs
REMOTE ALARM
P3 J8 TEST
P9
PA
COMPACT FLASH
J19
PWR
UPPER LCD PANEL LOWER LCD PANEL
J7
J20
FROM GUI CPU PCB J4, J6
J2
INSPIRATORY ELECTRONICS PCB
OXYGEN PSOL (PSOL1)
FROM GUI CPU PCB J12, J15
INSP PRES XDUCER A/Z SOL (SOL1)
P10
J5 TOUCH FRAME PCB
P3
OXYGEN FLOW SENSOR (Q1)
P4
AIR FLOW SENSOR (Q2)
J12 J1 AI PCB
P9 J9
PWR & ANALOG SIGNALS P10 J10 J6 DIGITAL 2 LEDS SIGNALS P5 J13
P1
BD +5 V, BD +12 V, GUI +5 V, GUI +12 V, -15 V, +15 V, CTRL/STATUS
J11
P7
BPS BPS PCB
PTS 2000
J3
J2
+36 V
BDU LED PCB
BATTERY CHARGED
J3
J1
OXYGEN PRESS SWITCH (PS1)
POWER SUPPLY AIR PRESS SWITCH (PS2)
I/O CONTROL J1 F1
PWR SW (S1)
BATTERY PACK F1
J2
BATTERY CHARGING
P1 OXYGEN SENSOR
S1
EXH MODULE HUMIDIFIER OUTLET EXH PRESS XDUCER A/Z SOL (SOL2)
AC PANEL COMPRESSOR UNIT
J4
EXH HEATER (EXH HTR) J1 UNLOADING SOLENOID (SOL3)
EXH FLOW SENSOR (Q3)
J5
J1
CB2
BLU BRN
AC FILTER PCB
E4
BLU BRN
E3
J3 EQUIPOTENTIALITY CONNECTOR
J4
COMP MOTOR
EXH PCB TRANSDUCER PE
J6
CB1
TH1
J2
EXH VALVE (EV)
K1 RELAY
PC
100-120 V ONLY
POWER RELAY
COMPRESSOR PCB
FAN 1
FAN 2
STARTING CAPACITOR
Figure 2-44. Electrical system block diagram (9.4-inch GUI-Trending-enabled CPU PCB shown)
Puritan Bennett™ 840 Ventilator System Service Manual
2-59
Theory of Operation
This page intentionally blank.
2-60
Puritan Bennett™ 840 Ventilator System Service Manual
Theory of Operation
INSPIRATORY MODULE
GUI
J3
GUI CPU PCB
P1 GUI LED PCB
J6 J8
TO UPPER LCD PANEL
VGA LCD CONTROLLER
J7
BACKLIGHT INVERTER J3 PCB
P1 RS-232
BD CPU P1 PCB
P2 J7
REMOTE ALARM J9
UPPER LCD PANEL
INSPIRATORY ELECTRONICS PCB
P9 SAFETY VALVE P6
P2
AIR PSOL (PSOL2)
PA LOWER LCD PANEL
P5
PI
OXYGEN PSOL (PSOL1)
FROM GUI CPU PCB J16, J18
J19
J20
MOTHERBOARD
J2
J7
VGA LCD J16 CONTROLLER J18
TO LOWER LCD PANEL
FROM GUI CPU PCB J6, J8
COLOR I/O PCBs
PWR
INSP PRES XDUCER A/Z SOL (SOL1)
P10
P3 J8 DIGITAL SIGNALS
TEST 9 LEDS DATA KEY
KEYBD/KNOB
J5 TOUCH FRAME PCB
P3
OXYGEN FLOW SENSOR (Q1)
P4
AIR FLOW SENSOR (Q2)
J12 J1 AI PCB
P9 J9
PWR & ANALOG SIGNALS P10 J10 J6 DIGITAL 2 LEDS SIGNALS P5 J13
P1
BD +5 V, BD +12 V, GUI +5 V, GUI +12 V, -15 V, +15 V, CTRL/STATUS
J11
P7
BPS BPS PCB
PTS 2000
J3
J2
+36 V
BDU LED PCB
BATTERY CHARGED
J3
J1
OXYGEN PRESS SWITCH (PS1)
POWER SUPPLY
AIR PRESS SWITCH (PS2)
I/O CONTROL J1 F1
PWR SW (S1)
BATTERY PACK F1
J2
BATTERY CHARGING
P1 OXYGEN SENSOR S1
EXH MODULE
HUMIDIFIER OUTLET EXH PRESS XDUCER A/Z SOL (SOL2)
AC PANEL COMPRESSOR UNIT
J4
EXH HEATER (EXH HTR) J1 UNLOADING SOLENOID (SOL3)
EXH FLOW SENSOR (Q3)
J5
J1
CB2
BLU BRN
AC FILTER PCB
E4
BLU BRN
E3
J3 EQUIPOTENTIALITY CONNECTOR
J4
COMP MOTOR
EXH PCB TRANSDUCER PE
J6
CB1
TH1
J2
EXH VALVE (EV)
K1 RELAY
PC
100-120 V ONLY
POWER RELAY
COMPRESSOR PCB
FAN 1
FAN 2
STARTING CAPACITOR
Figure 2-45. Electrical system block diagram (older 9.4-inch GUI shown)
Puritan Bennett™ 840 Ventilator System Service Manual
2-61
Theory of Operation
2.4.3
AC distribution components
The AC distribution components include • a power cord • AC panel • power switch • interfacing cables, wires, and components Mains (AC) power (or facility power) is applied through the power cord to the AC receptacle and main and auxiliary circuit breakers. From the main circuit breaker, power is applied through the AC filter PCB directly to the power supply. Power to the power supply bypasses the power switch, enabling the power supply to continually charge the BPS. When the power switch is set to off, the secondaries that power the ventilator electronics are not active. From the auxiliary circuit breaker, power is applied via the power relay to the compressor compartment AC receptacle and the humidifier receptacle. The compressor compartment power cord plugs into receptacle J4, supplying AC power to the compressor unit, while the humidifier receptacle is intended to power an optional humidifier.
2.4.3.1 Power cord The 840 Ventilator System includes a detachable power cord. The power cord has an IECstandard, three-prong connector. The plug end varies, corresponding to different country requirements.
2.4.3.2 AC panel The AC panel (Figure 2-45 and Figure 2-46), a single field-replaceable unit (FRU), includes components that apply AC to the ventilator head, compressor unit, and optional humidifier. The AC panel includes AC receptacle J1, circuit breakers CB1 and CB2, AC filter PCB, power relay K1, compressor receptacle J4, and potential equalization connector J2. A humidifier receptacle (J3), which is connected to but is not a part of the AC panel, is on the front of the ventilator. • The AC receptacle (J1) receives facility AC power via the power cord. Warning
Ensure that the power cord retainer bracket is properly installed and secures the power cord to the AC receptacle (J1). • The AC panel houses two push-to-reset type circuit breakers. The 5 A main circuit breaker (CB1) limits current to the power supply. The 10 A (100 – 120 V) or 5 A (220 – 240 V) auxiliary circuit breaker (CB2) limits current to the compressor and humidifier circuits. • The AC filter PCB reduces AC line noise to and from the ventilator. • The power relay (K1) switches power to humidifier receptacle J3 and compressor receptacle J4 when the power switch (S1) is on. The relay is powered from a dedicated +12 V power supply output, which is active when the power switch is on. • The compressor receptacle (J4) receives AC power via K1 and provides the AC power outlet for the compressor power cord. • The humidifier receptacle (J3) receives AC power via K1 and provides an AC power outlet for the humidifier power cord. • The potential equalization connector (J2) interfaces the equipment and the potential equalization bus bar.
2-62
Puritan Bennett™ 840 Ventilator System Service Manual
Theory of Operation
BDU compressor DC cable 4-074223-00
To AI PCB
Motor mounting plate
Compressor motor
Compressor base plate
Compressor top view
GRN/YEL
GRN/YEL
GRN/YEL
Capacitor
Ground wire from base plate 4-076299-00
BLK (4)
Grommet
GRN/YEL
Compressor PCB 4-075802-SP
J5
Unloading solenoid (SOL 3)
J6 J4
J3 Hose to BDU Compressor AC power cord 4-076287-00
J2
J1
Unloading
Fan harness (2) 4-076236-00
To AC panel
Figure 2-86. Puritan Bennett™ 840 Ventilator System interconnect diagram – Compresor unit
Puritan Bennett™ 840 Ventilator System Service Manual
2-106
Theory of Operation
2.4.12.3 806 Compressor unit operation The 806 compressor operates in two modes: run and standby. A special start-up sequence ensures that the motor starts with an unloaded compressor head.
2.4.12.3.1
Run mode
When AC mains power is > 80% of nominal, the compressor is available for use if wall air is unavailable or the pressure is < 26 psig. In run mode, the compressor acts as the air source for the ventilator, continuously supplying air to meet the ventilator’s full flow requirements (200 L/min peak flow, 2.5 L breath volume). When accumulator pressure reaches 27 psig, SOL3 is energized, venting excess flow to assist transporting water vapor out of the air dryer. The solenoid becomes de-energized when the pressure drops below 22.5 psig (see Figure 2-85). This cycle repeats as pressure rises and falls in the accumulator.
2.4.12.3.2
Standby mode
The compressor enters stand-by mode when there is sufficient wall air pressure to supply the ventilator. When the ventilator is powered up, it runs through POST and detects the presence of the compressor. The compressor turns on and pressurizes the accumulator. During this cycle, the green compressor ready indicator on the GUI illuminates when the accumulator pressure reaches at least 13 psig. When the accumulator pressure reaches 27 psig, the compressor turns off. If pressure in the accumulator drops below 22.5 psig (due to small leaks in the system or cooling of compressed air), the compressor starts and recharges the accumulator to 27 psig (see Figure 2-85).
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Puritan Bennett™ 840 Ventilator System Service Manual
Parts List
1 24 (4 PL)
15
23
4 3 22 19 (4 PL) Fisher & Paykel™* humidifier, externally-powered (220-240 V)
2
6 10
21 (3 PL) 16
11
12
7
18
8 5
20
9
15
17
51 (2 PL)
Fisher & Paykel™* humidifier, ventilator-powered (100-120 V) 13 Note: See Sections 9.4.12 and 9.4.13 for accessory bracket part numbers for ventilators mounted on Puritan Bennett™ 800 Series Ventilator Compressor Mount Cart and Puritan Bennett 800 Series Ventilator Pole Cart, respectively. Brackets are shipped with separate installation instructions.
14
Figure 9-1. 840 Ventilator System patient system and accessories
Puritan Bennett™ 840 Ventilator System Service Manual
9-5
Parts List
9.2.1
840 Ventilator System NeoMode patient system and accessories NeoMode patient system and accessories parts list
Item no. (Figure 9-2)
Part no.
Quantity
--
4-076440-00
1
• Upgrade Kit, NeoMode, English, Non-US
--
4-076441-00
1
• Upgrade Kit, NeoMode, English, US only
--
4-076442-00
1
• Upgrade Kit, NeoMode, German
--
4-076443-00
1
• Upgrade Kit, NeoMode, French
--
4-076444-00
1
• Upgrade Kit, NeoMode, Italian
--
4-076445-00
1
• Upgrade Kit, NeoMode, Japanese
--
4-076446-00
1
• Upgrade Kit, NeoMode, Spanish
--
4-076447-00
1
• Upgrade Kit, NeoMode, Portuguese
1 --
9-6
Description
307/6922
• Ventilator breathing circuit, neonatal, disposable (DAR)
7441-4S2
• Ventilator breathing circuit, neonatal, disposable, 4 feet (Allegiance Healthcare Corporation )
2
4-076408-00
1
--
Part number 351P19005 Order part number 4-076408-00
Box of 12
• Expiratory bacteria filter (DAR), disposable
3
4-074601-00
Box of 12
• Inspiratory bacteria filter, 22-mm ISO connectors, disposable, D/ Flex
4
4-076405-00
1
• Adapter plate, NeoMode
--
4-076589-00
1
• Label, adapter, NeoMode
• Filter, expiratory, NeoMode
Puritan Bennett™ 840 Ventilator System Service Manual
Parts List
Figure 9-10. 10.4-inch GUI assembly with TE GUI CPU PCB
Puritan Bennett™ 840 Ventilator System Service Manual
9-33
Parts List
9.4.3
10.4-inch GUI (graphic user interface) assembly 10.4-inch GUI assembly parts list
Item no. (Figure 9-12)
Part no.
Quantity
1
4-076672-SP
1
• Housing assembly, GUI rear
2
4-076678-SP
1
• Shield, CPU PCB
3
4-070034-00
47
• Screw, 6-32 X 0.38, sems, SQCN
4
4-075727-SP
1
• PCB, GUI CPU
5
4-076675-00
1
• Bracket, LCD panels and GUI CPU PCB
6
4-076656-00
1
• Cable assembly, GUI alarm
7
4-073500-SP
1
• PCB, GUI LED
8
4-076651-00
1
• Cable assembly, touchframe
9
4-079013-SP
1
• Speaker, GUI alarm, 16 OHM
10
4-076652-00
1
• Cable assembly, keyboard
11
4-076671-SP
1
• Housing assembly, GUI front
12
4-076687-00
4
• Screw, 2-56 X 1/4 PH, nylon
13
4-076855-SP
2
• Inverter, backlight,10.4-inch GUI
14
4-076653-00
2
• Cable assembly, backlight, 10.4-inch GUI
15
4-076658-00
8
• Screw. 6-32 X 1/4 PH sem
16
4-078267-SP
2
• Display, LCD, 10.4-inch color
17
4-076684-00
3
• Gasket, EMC, Chrometrics, 8.5"
18
4-076685-00
2
• Gasket, EMC, Chrometrics, 13"
19
4-076660-00
11
• Rivet, snap, H type
20
4-076676-00
1
• Shield, LCD
21
4-076530-SP
1
• PCB, touchframe
22
4-076686-00
1
• Gasket, EMC, Chrometrics, RS-232, 5"
23
4-076665-00
4
• Screw, lock, fem, 4-40, 0.75L
24
4-076677-00
1
• Shield, RS-232
25
4-071944-SP
1
• Cable, flex circuit assembly, RS-232
26
4-076856-SP
2
• Cable, flex circuit assembly, video
27
4-076688-00
4
• Washer, nylon
28
4-075865-00
1
• Shield, dielectric, GUI
--
10021120
1
• FRU, IC, real-time clock (not shown)
9-34
Description
Puritan Bennett™ 840 Ventilator System Service Manual
Parts List
Figure 9-11. 10.4-inch GUI assembly
Puritan Bennett™ 840 Ventilator System Service Manual
9-35
Parts List
9.4.4
10.4-inch GUI (graphic user interface) handle 10.4-inch GUI handle parts list
Item no. (Figure 9-13)
Part no.
Quantity
--
--
1
Graphic user interface (GUI) (See Section 9.4 for NHA.)
--
4-078179-00
1
10,000 hour preventative maintenance kit
1
4-070039-00
2
• Screw, PAN, 6-32 x 1.5", sems (Attach top and bottom handles to rear housing.)
2
4-073008-00
1
• Handle, GUI top
3
4-075864-00
1
• Cable assembly, GUI-to-BDU, 3-ft (0.9-m)
4-071441-00
9-36
Description
• Cable assembly, GUI-to-BDU extension, 10-ft (3.0-m) (for shelf mount)
4
4-075684-00
2
• Jackscrew
5
4-070036-00
1
• Screw, PAN, 6-32 x 0.75, sems
6
4-073007-00
1
• Handle, GUI bottom
7
--
1
• Kit, Label, Product information (Refer to Section 9.4.1 for part number.)
8
--
1
• Label, serial number (Contact your Covidien representative for ordering information.)
9
4-076663-00
1
• Window, LED status, GUI
Puritan Bennett™ 840 Ventilator System Service Manual
Parts List
9-1.
840 Ventilator System patient system )
1 (2PL) 2 3 4 (2 PL)
5 6
9
7 8 10
33 (13 PL)
11 (5 PL)
28 (2 PL)
12 13
39
32 (13 PL)
37 14
30
38
18
31 (11 PL) 40
15 34 19 16
29 41
35 (2 PL)
27
17
36 (2 PL)
26 25 24 (4 PL) 23
20 22 21
Figure 9-15. 9.4-inch GUI assembly
Puritan Bennett™ 840 Ventilator System Service Manual
9-45
Parts List
9.4.7.1 9.4-inch GUI front housing assembly 9.4-inch GUI front housing assembly parts list Item no. (Figure 9-17)
Part no.
Quantity
--
--
1
Housing assembly, GUI front (See Section 9.4.7 for NHA.)
1
4-073003-00
1
• Bezel, GUI
2
4-073043-00
1
• Gasket, window
3
4-073036-00
1
• Window, GUI
4
4-073033-00
1
• Gasket, housing
5
4-073028-00
1
• Label, alarm graphics, GUI, non-US
4-075429-00
• Label, alarm graphics, GUI, US
6
4-073001-00
1
• Housing, GUI front
7
4-075828-SP
1
• Keyboard assembly, English, non-US (Includes PCB and knob)
8
9-46
Description
4-075834-SP
• Keyboard assembly, English, US (Includes PCB and knob)
4-075829-SP
• Keyboard assembly, French (Includes PCB and knob)
4-075830-SP
• Keyboard assembly, German (Includes PCB and knob)
4-075832-SP
• Keyboard assembly, Italian (Includes PCB and knob)
4-075835-SP
• Keyboard assembly, Japanese (Includes PCB and knob)
4-075833-SP
• Keyboard assembly, Portuguese (Includes PCB and knob)
4-075831-SP
• Keyboard assembly, Spanish (Includes PCB and knob)
4-071313-00
1
• Cable assembly, keyboard
Puritan Bennett™ 840 Ventilator System Service Manual