LUDLUM MODEL 4906 SERIES
HAND AND FOOT MONITOR
TECHNICAL MANUAL
September 2018
LUDLUM MODEL 4906 SERIES
HAND AND FOOT MONITOR
TECHNICAL MANUAL
September 2018
Model 4906 Series Technical Manual
STATEMENT OF WARRANTY
Ludlum Measurements, Inc. warrants the products covered in this manual to be free
of defects due to workmanship, material, and design for a period of twelve months
from the date of delivery. The calibration of a product is warranted to be within its
specified accuracy limits at the time of shipment. In the event of instrument failure,
notify Ludlum Measurements to determine if repair, recalibration, or replacement is
required.
This warranty excludes the replacement of photomultiplier tubes, G-M and
proportional tubes, and scintillation crystals which are broken due to excessive
physical abuse or used for purposes other than intended.
There are no warranties, express or implied, including without limitation any implied
warranty of merchantability or fitness, which extend beyond the description of the
face there of. If the product does not perform as warranted herein, purchaser’s sole
remedy shall be repair or replacement, at the option of Ludlum Measurements. In no
event will Ludlum Measurements be liable for damages, lost revenue, lost wages, or
any other incidental or consequential damages, arising from the purchase, use, or
inability to use product.
RETURN OF GOODS TO MANUFACTURER
If equipment needs to be returned to Ludlum Measurements, Inc. for repair or calibration, please
send to the address below. All shipments should include documentation containing return shipping
address, customer name, telephone number, description of service requested, and all other necessary
information. Your cooperation will expedite the return of your equipment.
LUDLUM MEASUREMENTS, INC.
ATTN: REPAIR DEPARTMENT
501 OAK STREET
SWEETWATER, TX 79556
800-622-0828 325-235-5494
FAX 325-235-4672
Ludlum Measurements, Inc. Page 1 September 2018
Model 4906 Series Technical Manual
Model 4906 Series
Applies to all 4906
Series:
Host Board, Drawing
420 x 275
CRYSTAL
CAPACITORS
Parts List
Reference Description Part Number
UNIT Completely Assembled
Model 4906A 48-3687
UNIT Completely Assembled
Model 4906AB 48-3688
UNIT Completely Assembled
Model 4906P 48-3919
BOARD Assembled Host Board 5420-275
Y1 32.768 KHZ 01-5740
C1 1µf, 10V 04-5745
C2 4.7µf, 50V 04-5819
C3 10µf, 10V 04-5757
C4 0.01µf, 50V 04-5741
C5-C6 4.7µf, 50V 04-5819
C7 6.8µf, 50V 04-5756
C8 4.7µf, 50V 04-5819
C9 0.1µf, 25V 04-5744
C10 4.7µf, 50V 04-5819
C11 100µf, 10V 04-5820
C12 1µf, 10V 04-5745
C13 0.1µf, 25V 04-5744
C14 10µf, 10V 04-5757
C15 0.1µf, 25V 04-5744
C16 680pf, 100V 04-5801
Ludlum Measurements, Inc. Page 2 September 2018
Model 4906 Series Technical Manual
TRANSISTORS
VOLTAGE
REGULATORS
INTEGRATED
CIRCUITS
DIODES
RESISTORS
Reference Description Part Number
C17 10µf, 25V 04-5728
C18-C19 0.01µf, 50V 04-5741
C20 10µf, 10V 04-5757
C21 0.1µf, 25V 04-5744
C22 1µf, 10V 04-5745
C23 0.1µf, 25V 04-5744
C24 1µf, 10V 04-5745
C25-C28 0.1µf, 25V 04-5744
C29-C32 0.001µf, 50V 04-5742
Q1-Q2 RK7002 05-5931
Q4-Q7 RK7002 05-5931
Q8 NDS356 05-5877
Q9-Q10 RK7002 05-5931
VR1 TPS71533DCKR 05-5936
VR2 TPS5420 05-5941
VR3 TPS61170 05-5940
U1-U2 SN74AHC138D 06-6480
U3 MSP430F2012 06-6729
U4 SM74JC151D 06-6750
U5 ADUC843 06-6703
U6 TPS3825-33 06-6558
U7 SN74AHC1G14 06-6556
U8 TPA2012D2 06-6766
CR1 MBRS130LTS 07-6423
CR2-CR3 MBR0520LT1 07-6422
CR4 MBRS340T 3G 07-6469
CR5 MBR0540LT1 07-6546
R1 10K, 1/10W, 1% 12-7083
R2 150K, 1/10W, 1% 12-7150
R3-R8 10K, 1/10W, 1% 12-7083
R9 1K, 1/10w, 1% 12-7084
Ludlum Measurements, Inc. Page 3 September 2018
Model 4906 Series Technical Manual
CONNECTORS
INDUCTORS
MISCELLANEOUS
Reference Description Part Number
R10 10K, 1/10W, 1% 12-7083
R11-R14 1K, 1/10w, 1% 12-7084
R15-R16 150K, 1/10W, 1% 12-7150
R17-19 1K, 1/10W, 1% 12-7084
R22 1K, 1/10W, 1% 12-7084
R23 10K, 1/4W, 1% 12-7839
R24-R25 10K, 1/10W, 1% 12-7083
R26 187K, 100mW, 1% 12-8016
R27 3.16K, 1/4W, 1% 12-7903
R28-R32 10K, 1/10W, 1% 12-7083
R33 499, 1/4W, 1% 12-7907
R34-R41 1K, 1/10W, 1% 12-7084
R42 499, 1/4W, 1% 12-7907
R43-50 1K, 1/10W, 1% 12-7084
J1-J8 LP RJ-11 6P 13-9321
J9 53014-0310, MOLEX 13-9038
J10 640456-3 MTA 100X3 13-8081
J11 53014-0310, MOLEX 13-9038
J12 SLM-104-01-S-S, JTAG 13-8986
J13-J14 640456-4, MTA 100X4 13-8088
J15 53014-0310, MOLEX 13-9038
J16 640456-6, MTA 100X6 13-8095
J17 640456-8, MTA 100X8 13-8039
J18 640456-4, MTA 100X4 13-8088
J19 640445-2, MTA 156X2 13-8098
J20-J26 53014-0310, MOLEX 13-9038
J27 640445-2, MTA 156X2 13-8098
J28-J29 640445-2, 640456-2, MTA 100X2 13-8073
J30-J32 640456-4, MTA 100X4 13-8088
P6 640445-2, 640456-2, MTA 100X2 13-8073
L1 CTCDRH125-330M 21-8926
L2 10µH 21-8925
L3-L6 220r-100Mhz 21-9986
F1-F9 300 mA FUSE 21-8924
SW1-SW2 SWITCH (KSC241G) 08-6827
Ludlum Measurements, Inc. Page 4 September 2018
Model 4906 Series Technical Manual
Power/Relay Board,
Drawing 540 x 170
CAPACITORS
TRANSISTORS
VOLTAGE
REGULATOR
INTEGRATED
CIRCUITS
DIODES
RESISTORS
Reference Description Part Number
BOARD Assembled POWER/RELAY BOARD 5540-170
C1 4.7µf, 50V 04-5819
C2 10µf, 6.3V 04-5746
C3 0.01µf, 50V 04-5741
C4-C7 10µf, 6.3V 04-5746
C8 10µf, 25V 04-5824
C9 0.01µf, 50V 04-5741
C10 4.7µf, 50V 04-5819
C11 330µf, 10V 04-5832
C12 4.7µf, 50V 04-5819
C13 0.01µf, 50V 04-5741
C14 68µf, 25V 04-5828
C15 0.1µf, 25V 04-5744
Q1-Q6 RK7002AT116 05-5931
VR2 TPS5450 05-5947
U2 TLC3712ID 06-6290
CR1-CR5 MBR0520LT1G 07-6422
CR6 SSC54-E3/57T 07-6230
CR7 MBR0520LTG 07-6422
R1-R5 2.21K, 1/10W, 1% 12-7139
R6-R8 1M, 1/10W, 1% 12-7081
R9-R10 1K, 1/10W, 1% 12-7084
R11-R12 1M, 1/10W, 1% 12-7081
Ludlum Measurements, Inc. Page 5 September 2018
Model 4906 Series Technical Manual
CONNECTORS
MISCELLANEOUS
Sensor Combiner,
Drawing 420 x 540
CONNECTORS
MISCELLANEOUS
Reference Description Part Number
R13 10K, 1/10W, 1% 12-7083
R14 2.21K, 1/10W, 1% 12-7139
R17 1M, 1/10W, 1% 12-7081
R23 10K, 1/4W, 1% 12-7839
R27 3.16K, 1/4W, 1% 12-7903
J1 RAPC712, +12VDC 13-8445
J2 640445-3, MTA 156X3 13-8125
J3-J4 640456-2, MTA 100X2 13-8073
J5 KPJX-4S-S 13-9071
J6-J7 640445-2, MTA 156X2 13-8098
J8 640456-2, MTA 100X2 13-8073
J9 640456-5, MTA 100X5 13-8057
J10 640445-2, MTA 156X2 13-8098
J11-J12 640456-2, MTA 100X2 13-8073
J13 640445-6, MTA 156X6 13-8071
J14-J15 640445-3, MTA 156X3 13-8125
J16 640456-2, MTA 100X2 13-8073
J17 640445-2, MTA 156X2 13-8098
J18 640456-6, MTA 100X6 13-8095
DS1-DS9 LED RED, LN1271RAL 07-6378
F1-F2 FUSE-3A, 60v 21-8890
L1 15µH, 5.65 A 21-8889
RY1-RY3 RELAY-G6B-2114P-USPC12 22-9254
RY4-RY5 RELAY-AZ850-5 21-8905
RY6 G6B-2241P 22-9255
SW1 PN11SHNA03QE 08-6900
BOARD Assembled Sensor Combiner Board 5420-540
J1-J4 53014-0310 HEADER3-MOLEX 13-9038
P1 640457-4, MTA 100X4 13-8089
MH1-MH2 FASTENTER-CONCORD-90-9451-044
21-9204
Ludlum Measurements, Inc. Page 6 September 2018
Model 4906 Series Technical Manual
For Model 4906A only:
Air Alpha Detector Board,
Drawing 420 x 520
CAPACITORS
Reference Description Part Number
BOARD Assembled Air Alpha Detector Board
5420-520
C1 10µf, 10V 04-5757
C2 68µf, 16V-T 04-5768
C3 0.1µf, 25V 04-5744
C4 10pf, 100V 04-5749
C5 10µf, 10V 04-5757
C6 0.1µf, 25V 04-5744
C7 1µf, 10V 04-5745
C8 10µf, 10V 04-5757
C9 0.1µf, 25V 04-5744
C10 1µf, 10V 04-5745
C11-C12 10pf, 100V 04-5749
C13 0.01µf, 3kV 04-5762
C14 0.001µf, 50V 04-5742
C15 1µf, 10V 04-5745
C16 100pf, 100V 04-5743
C17-C24 0.01µf, 500V 04-5873
C25 68µf, 16V-T 04-5768
C26 0.1µf, 25V 04-5744
C27-C28 0.01µf, 3kV 04-5762
C29-C36 0.01µf, 500V 04-5873
C37 1µf, 10V 04-5745
C38 10µf, 10V 04-5757
C39 1µf, 10V 04-5745
C40 0.01µf, 50V 04-5741
C41 4.7pf, 50V 04-5844
C42-C43 10µf, 10V 04-5757
C44 0.001µf, 25V 04-5951
C45 100pf, 3kV 04-5735
C46 0.001µf, 25V 04-5951
C47-C48 10µf, 10V 04-5757
C49 0.1µf, 25V 04-5744
C50 470pf, 100V 04-5767
C51 10pf, 100V 04-5749
C52 470pf, 100V 04-5767
C53 10pf, 100V 04-5749
C54 10µf, 10V 04-5757
C55 1µf, 10V 04-5745
Ludlum Measurements, Inc. Page 7 September 2018
Model 4906 Series Technical Manual
VOLTAGE
REGULATOR
INTEGRATED
CIRCUITS
DIODES
Reference Description Part Number
C56 0.01µf, 50V 04-5741
C57 10µf, 10V 04-5757
C58 10pf, 100V 04-5749
C59 10µf, 10V 04-5757
C61-62 1µf, 10V 04-5745
C63 10µf, 10V 04-5757
C64 100pf, 100V 04-5743
C65 10µf, 10V 04-5757
C66 1µf, 10V 04-5745
C67 10µf, 10V 04-5757
C68 1µf, 10V 04-5745
C70-C71 1µf, 10V 04-5745
C72 100pf, 100V 04-5743
C73 10µf, 10V 04-5757
C74-C75 1µf, 10V 04-5745
C76 10pf, 100V 04-5749
VR1 TPS71550DCKR 05-5939
VR2-VR3 TPS71533DCKR 05-5936
U1 MSP430F5528IRGCT 06-6797
U2 SN74AHC14DR 06-6474
U3 TPS3925-33DBVT 06-6558
U4 OPA2347UA 06-6764
U5 LT1304CS8 06-6394
U6-U7 LM6172IMX 06-6737
U8 OPA140AIDBVT 06-6891
U11 LM828M5/NOPB 06-6518
U12 LMC7111BIM5X 06-6410
U13 CD74HC4538PWT 06-6686
U14 MAX986EUK+T 06-6601
U15 LMC7111BIM5X 06-6410
U16 MAX986EUK+T 06-6601
CR1 TVS-16V 07-6548
CR2 MBR0540LT1 07-6546
CR3 MB40520LT1G 07-6422
CR4-CR13 CMPD2005SLF 07-6468
Ludlum Measurements, Inc. Page 8 September 2018
Model 4906 Series Technical Manual
RESISTORS
Reference Description Part Number
R1 1K, 100 mW, 1% 12-7084
R2 2.21K, 100mW, 1% 12-7172
R3 1K, 100 mW, 1% 12-7084
R4 2.21K, 100mW, 1% 12-7172
R5 10K, 100mW, 1% 12-7083
R6 49.9OHM, 100mW, 1% 12-7138
R7 1K, 100 mW, 1% 12-7084
R8 2.21K, 100mW, 1% 12-7172
R9 1K, 100 mW, 1% 12-7084
R10 150M, 250mW, 10% 12-8021
R11 10M, 250mW, 1% 12-7996
R12 1M, 250mW, 1% 12-7844
R13 150k, 250mW, 1% 12-7150
R14 500M, 3kV, 2% 12-7031
R15 1K, 100 mW, 1% 12-7084
R16-R17 499K, 100mW, 1% 12-7091
R19-R21 100K, 100mW, 1% 12-7082
R22 1M, 100mW, 1% 12-8081
R23 1OHM, 100mW, 1% 12-7221
R24-R25 10OHM, 100mW, 1% 12-7163
R26 499OHM, 100mW, 1% 12-7212
R27 499OHM, 250mW, 1% 12-7907
R28 10M, 100mW, 1% 12-7090
R29 4.75K, 100mW, 1% 12-7149
R30-R33 1K, 100mW, 1% 12-7084
R34 49.9OHM, 100mW, 1% 12-7138
R35 1K, 100mW, 1% 12-7084
R36 2K, 100mW, 1% 12-7144
R37 1K, 100mW, 1% 12-7084
R38-R39 4.75K, 100mW, 1% 12-7149
R40-R41 10OHM, 100mW, 1% 12-7163
R44 1OHM, 100mW, 1% 12-7221
R53 100K, 100mW, 1% 12-7082
R55 499K, 100mW, 1% 12-7091
R56 10K, 100mW, 1% 12-7083
R59 22.1K, 100mW, 1% 12-7094
R60 1K, 100mW, 1% 12-7084
R61 499K, 100mW, 1% 12-7091
R62 10K, 100mW, 1% 12-7083
R63 499OHM, 100mW, 1% 12-7212
Ludlum Measurements, Inc. Page 9 September 2018
Model 4906 Series Technical Manual
CONNECTORS
MISCELLANEOUS
For Model 4906AB Only:
Detector Slave Board,
Drawing 420 x 474
CAPACITORS
Reference Description Part Number
J2 LP RJ-11 6P 13-9037
L1-L3 470µH, TKS1245 21-9699
P1 SHIELD-M4500 PREAMP 7436-142
T1 32377R TRANSFORMER-4275-156 21-9925
BOARD Assembled Detector Slave Board 5420-474
C1 10µf, 10V 04-5968
C2 68µf, 16V-T 04-5768
C3 0.1µf, 25V 04-5744
C4 10pf, 100V 04-5749
C5 10µf, 10V 04-5968
C6 0.1µf, 25V 04-5744
C7 1µf, 10V 04-5745
C8 10µf, 10V 04-5968
C9 0.1µf, 25V 04-5744
C10 1µf, 10V 04-5745
C11-C12 10pf, 100V 04-5749
C13 0.01µf, 3KV, 10% 04-5762
C14 0.001µf, 50V 04-5742
C15 1µf, 10V 04-5745
C16 10µf, 10V 04-5968
C17-C24 0.01µf, 500V, 10% 04-5873
C25 68µf, 16V-T 04-5768
C26 0.1µf, 25V 04-5744
C28 0.01µf, 3KV, 10% 04-5762
C29-36 0.01µf, 500V, 10% 04-5734
C37 1µf, 10V 04-5745
C38 10µf, 10V 04-5968
C39 1µf, 10V 04-5745
C40 0.01µf, 50V 04-5741
C41 10pf, 50V 04-6013
C42-C43 10µf, 10V 04-5968
Ludlum Measurements, Inc. Page 10 September 2018
Model 4906 Series Technical Manual
TRANSISTORS
VOLTAGE
REGULATOR
INTEGRATED
CIRCUITS
Reference Description Part Number
C44 0.001µf, 25V 04-5951
C45 100pf, 3kV 04-5735
C46 3000pf, 50V 04-5998
C49 10pf, 100V 04-5749
C50 0.001µf, 50V 04-5951
C51 10pf, 100V 04-5749
C54 10µf, 10V 04-5968
C55 1µf, 10V 04-5745
C56 0.01µf, 50V 04-5741
C57 10µf, 10V 04-5968
C59 10µf, 10V 04-5968
C61-C62 1µf, 10V 04-5745
C64 100pf, 100V 04-5743
C65 10µf, 10V 04-5968
C66 1µf, 10V 04-5745
C67 10µf, 10V 04-5968
C68 1µf, 10V 04-5745
C69 10pf, 100V 04-5749
C70-C71 1µf, 10V 04-5745
C72 100pf, 100V 04-5743
C73 10µf, 10V 04-5968
C74-C75 1µf, 10V 04-5745
C76 10pf, 100V 04-5749
Q4 MMBD7000LT1G 07-6355
VR1 TPS76150DVBR 05-5915
VR3 TPS76033DBVT 05-5880
U1 MSP430F5528IRGCT 06-6797
U2 SN74AHC14DR 06-6474
U3 TPS3825-33DBVT 06-6558
U4 TLV2333 06-6980
U5 LT1304CS8 06-6394
U6 LMH6646MA 06-6881
U7 LTC6993-3 06-6892
Ludlum Measurements, Inc. Page 11 September 2018
Model 4906 Series Technical Manual
DIODES
RESISTORS
Reference Description Part Number
U8 OPA140AIDBVT 06-6891
U9 OPA330AIDBVR 06-6972
U10 MAX986EUK+T 06-6601
U11 ICL7660SCBAZ 06-6437
U12 OPA330AIDBVR 06-6972
U13 CD74HC4538PWT 06-6686
U14 MAX986EUK+T 06-6601
U15 OPA330AIDBVR 06-6972
U16 MAX986EUK+T 06-6601
U17 LTC6993-3 06-6892
U19 LTC6993-3 06-6892
CR1 TVS-16V 07-6548
CR2 MBR0540LT1 07-6546
CR3 MBR0520LT1G 07-6422
CR4-CR11 CMPD2005SLF 07-6468
R1 1K, 100mW, 1% 12-7084
R2 2.21K, 100mW, 1% 12-7172
R3 1K, 100mW, 1% 12-7084
R4 2.21K, 100mW, 1% 12-7172
R5 10K, 100mW, 1% 12-7083
R6 49.9 OHMm 100mW, 1% 12-7138
R7 1K, 100mW, 1% 12-7084
R8 2.21K, 100mW, 1% 12-7172
R9 1K, 100mW, 1% 12-7084
R10 500M, 3KV, 2% 12-7031
R11 1M, 250mW, 1% 12-7844
R12 10M, 250mW, 1% 12-7996
R13 499K, 100mW, 1% 12-8260
R14 500M, 3KV, 2% 12-7031
R15 1K, 100mW, 1% 12-7084
R16 499K, 100mW, 1% 12-7091
R17 499K, 100mW, 1% 12-8260
R18 499K, 100mW, 1% 12-7091
R19-R20 10K, 100mW, 1% 12-7083
R21 100K, 100mW, 1% 12-7082
R22 1M, 100mW, 1% 12-7081
R23 1 OHM, 100mW, 1% 12-7221
R24 150 OHM, 100mW, 1% 12-7141
R25 10 OHM, 100mw, 1% 12-7163
Ludlum Measurements, Inc. Page 12 September 2018
Model 4906 Series Technical Manual
CONNECTORS
INDUCTORS
TRANSFORMER
MISCELLANEOUS
Reference Description Part Number
R26 280K, 100mW, 1% 12-8240
R27 49.9 OHM, 250mW 12-8263
R28 4.75M, 100mW, 1% 12-7089
R29 1K, 100mW, 1% 12-7084
R30 1M, 100mW, 1% 12-7081
R31 18.7K, 100Mw, 1% 12-7242
R32-R33 1K, 100mW, 1% 12-7084
R34 49.9 OHM 100mW, 1% 12-7138
R35 499K, 100mW, 1% 12-7091
R36 2K, 100mW, 1% 12-7144
R37 1K, 100mW, 1% 12-7084
R38 1M, 250mW, 1% 12-7844
R39 1M, 100mW, 1% 12-7081
R41 10 OHM, 100mW, 1% 12-7163
R44 1 OHM, 100mW, 1% 12-7221
R45 499K, 100mW, 1% 12-7091
R46-R47 10K, 100mW, 1% 12-7083
R50 49.9K, 100mW, 1% 12-8259
R51 100K, 100mW, 1% 12-8261
R53 22.1K, 100mW, 1% 12-7094
R54 10K, 100mW, 1% 12-7083
R55 499K, 100mW, 1% 12-7091
R56 10K, 100mW, 1% 12-7083
R57-R58 100K, 100mW, 1% 12-8261
R59 22.1K, 100mW, 1% 12-7094
R60 10K, 100mW, 1% 12-7083
R61 499K, 100mW, 1% 12-7091
R62 10K, 100mW, 1% 12-7083
R63 100Ohm, 100mW, 1% 12-7142
J2 LP RJ-11 6P MOLEX 43860-0026 13-9037
P2 1128-52-0319 18-9251
L1-L3 470µH, TKS1245 21-9699
T1 32377R 21-9925
DS1 HSMJ-A401-U40M1 LED Red-Orange 07-6520
Ludlum Measurements, Inc. Page 13 September 2018
Model 4906 Series Technical Manual
Gas Flow Control Board,
Drawing 420 x 424
CAPACITORS
TRANSISTORS
VOLTAGE
REGULATOR
INTEGRATED
CIRCUITS
DIODES
RESISTORS
Reference Description Part Number
BOARD AssembledGas Flow Control Board 5420-424
C1-C2 68µf, 16V-T 04-5768
C3-C4 10µf, 6.3V 04-5746
C7-C9 10pf, 100V 04-5749
C10 0.1µf, 25V 04-5744
C11 10µf, 10V 04-5757
C12 0.1µf, 25V 04-5744
C13 10µf, 10V 04-5757
C14 1µf, 10V 04-5846
C16 1µf, 16V 04-5701
C17 10µf, 10V 04-5757
Q1-Q2 RK7002AT116 05-5931
VR1 TPS76133DVBR, 3.3V 100 mA 06-6804
U1 MSP430F5528IRGCT 06-6797
U4 SN74AHC14DR 06-6474
U5 TPS3825-33DBVT 06-6558
CR1-CR4 MBR0540LT1, 40V, 500mW 07-6546
CR5-CR6 MBR0520LT1G 07-6422
R1-R2 2.21K, 100mW 12-7139
R3-R4 22.1OHM, 250 mW 12-7055
R5-R7 1K, 100mW 12-7084
R8 49.9 OHM, 100mW 12-7138
R9-R11 2.21K, 100mW 12-7172
R12-R14 10K, 100mW 12-7083
Ludlum Measurements, Inc. Page 14 September 2018
Model 4906 Series Technical Manual
CONNECTORS
MISCELLANEOUS
Gas Frisker Slave Board,
Drawing 420 x 427
CRYSTAL
CAPACITORS
Reference Description Part Number
P1-P2 640456-2, MTA 100x2 13-8073
P9 640456-5, MTA 100x5 13-8057
P10 LP RJ-11 6P, MOLEX 43860-0026 13-9037
P11 640456-2, MTA 100x2 13-8073
DS1-DS4 LN1271RAL, Red, LED-SMT-AK 07-6378
BOARD Assembled Gas Frisker
Slave Board 5420-427
Y1 32.768KHz 01-5740
C1 10µf, 10V 04-5757
C2 68µf, 16V-T 04-5768
C3 0.1µf, 25V 04-5744
C4 10pf, 100V 04-5749
C5 10µf, 10V 04-5757
C6 0.1µf, 25V 04-5744
C7 1µf, 10V 04-5745
C8 10µf, 10V 04-5757
C9 0.1µf, 25V 04-5744
C10 1µf, 10V 04-5745
C11-C12 10pf, 100V 04-5749
C13 0.01µf, 3KV, 10% 04-5762
C14 0.001µf, 50V 04-5742
C15 1µf, 10V 04-5745
C16 100pf, 100V 04-5743
C17-C24 0.01µf, 500V, 10% 04-5873
C25 68µf, 16V-T 04-5768
C26 0.1µf, 25V 04-5744
C28 0.01µf, 3KV, 10% 04-5762
C29-C36 0.01µf, 500V, 10% 04-5873
C37 1µf, 10V 04-5745
C38 10µf, 10V 04-5757
C39 1µf, 10V 04-5745
Ludlum Measurements, Inc. Page 15 September 2018
Model 4906 Series Technical Manual
TRANSISTORS
VOLTAGE
REGULATOR
Reference Description Part Number
C40 0.01µf, 50V 04-5741
C41 100pf, 100V 04-5743
C42-C43 10µf, 10V 04-5757
C44 470pf, 100V 04-5767
C45 100pf, 3KV 04-5735
C46 0.001µf, 50V 04-5742
C47-C48 10µf, 10V 04-5757
C49 0.1µf, 25V 04-5744
C50 470pf, 100V 04-5767
C51 10pf, 100V 04-5749
C52 470pf, 100V 04-5767
C53 10pf, 100V 04-5749
C54 10µf, 10V 04-5757
C55 1µf, 10V 04-5745
C56 0.01µf, 50V 04-5741
C57 10µf, 10V 04-5757
C58 10pf, 100V 04-5749
C59 10µf, 10V 04-5757
C61-C62 1µf, 10V 04-5745
C64 100pf, 100V 04-5743
C65 10µf, 10V 04-5757
C66 1µf, 10V 04-5745
C67 10µf, 10V 04-5757
C68 1µf, 10V 04-5745
C69 10pf, 100V 04-5749
C70-C71 1µf, 10V 04-5745
C72 100pf, 100V 04-5743
C73 10µf, 10V 04-5757
C74-C75 1µf, 10V 04-5745
C76 10pf, 100V 04-5749
C77 68µf, 16V-T 04-5768
C78 10µf, 10V 04-5757
C79 68µf, 16V-T 04-5768
C80 10µf, 10V 04-5757
Q2 RK7002AT116 05-5931
VR1 TPS71501 05-5962
Ludlum Measurements, Inc. Page 16 September 2018
Model 4906 Series Technical Manual
INTEGRATED
CIRCUITS
DIODES
RESISTORS
Reference Description Part Number
VR2-VR3 TPS71533DCKR 05-5936
U1 MSP430F5528IRGCT 06-6797
U2 SN74AHC14DR 06-6474
U3 TPS3825-33DBVT 06-6558
U4 OPA2347UA 06-6764
U5 LT1304CS8#TRP 06-6394
U6-U7 LM6172IMX/NOPB 06-6737
U8 OPA140AIDBVT 06-6891
U9 LMC7111BIM5X 06-6410
U10 MAX986EUK+T 06-6601
U11 LTC1144IS8 05-5923
U12 LMC7111BIM5X 06-6410
U13 CD74HC4538PWT 06-6686
U14 MAX986EUK+T 06-6601
U15 LMC7111BIM5X 06-6410
U16 MAX986EUK+T 06-6601
U17 MSP430F2012IRSAT 06-6729
U18 LMC7111BIM5X 06-6410
U19 LTC6993-3 06-6892
CR1 TVS-16V 07-6548
CR2 MBR0540LT1 07-6546
CR3 MBR0520LT1G 07-6422
CR4-CR11 CMPD2005SLF 07-6468
R1 1K, 100mW, 1% 12-7084
R2 2.21K, 100mW, 1% 12-7172
R3 1K, 100mW, 1% 12-7084
R4 2.21K, 100mW, 1% 12-7172
R5 10K, 100mW, 1% 12-7083
R6 49.9 OHM, 100mW, 1% 12-7138
R7 1K, 100mW, 1% 12-7084
R8 2.21K, 100mW, 1% 12-7172
R9 1K, 100mW, 1% 12-7084
R10 500M, 3KV, 2% 12-7031
R11 10M, 250mW, 1% 12-7996
R12 1M, 250mW, 1% 12-7844
Ludlum Measurements, Inc. Page 17 September 2018
Model 4906 Series Technical Manual
Reference Description Part Number
R13 499K, 100mW, 1% 12-7091
R14 500M, 3KV, 2% 12-7031
R15 1K, 100mW, 1% 12-7084
R16-R17 499K, 100mW, 1% 12-7091
R18-R21 100K, 100mW, 1% 12-7082
R22 1M, 100mW, 1% 12-7081
R23 1 OHM, 250 mW, 1% 12-7221
R24-R25 10 OHM, 100 mW, 1% 12-7163
R26 2K, 100mW, 1% 12-7144
R27 10K, 250 mW, 1% 12-7839
R28 22.1K, 100mW, 1% 12-7094
R29 4.75K, 100mW, 1% 12-7149
R30-R33 1K, 100mW, 1% 12-7084
R34 49.9 OHM, 100mW, 1% 12-7138
R35-R37 1K, 100mW, 1% 12-7084
R38 10K, 100mW, 1% 12-7083
R39 4.75K, 100mW, 1% 12-7149
R40-R41 10 OHM, 100 mW, 1% 12-7163
R42-R43 1K, 100mW, 1% 12-7084
R44 1 OHM, 250 mW, 1% 12-7221
R45 499K, 100mW, 1% 12-7091
R46-R47 10K, 100mW, 1% 12-7083
R48 1.87M, 100mW, 1% 12-8172
R49 499K, 100mW, 1% 12-7091
R50 49.9K, 100mW, 1% 12-7200
R51 100K, 100mW, 1% 12-7082
R53 100K, 100mW, 1% 12-7082
R54 10K, 100mW, 1% 12-7083
R55 499K, 100mW, 1% 12-7091
R56 10K, 100mW, 1% 12-7083
R57-R58 100K, 100mW, 1% 12-7082
R59 22.1K, 100mW, 1% 12-7094
R60 10K, 100mW, 1% 12-7083
R61 499K, 100mW, 1% 12-7091
R62 10K, 100mW, 1% 12-7083
R63 1K, 100mW, 1% 12-7084
R64 499K, 100mW, 1% 12-7091
R65 100 OHM, 250mW, 1% 12-7840
R66 100K, 100mW, 1% 12-7082
R67 49.9K, 100mW, 1% 12-7200
Ludlum Measurements, Inc. Page 18 September 2018
Model 4906 Series Technical Manual
CONNECTORS
INDUCTORS
TRANSFORMER
Gas Flow Sensor Board,
Drawing 420 x 430
INTEGRATED
CIRCUITS
RESISTORS
CONNECTORS
MISCELLANEOUS
Reference Description Part Number
J2 LP RJ-11 6P, MOLEX 43860-002 13-9037
J3 135-3701-201 MMCX Jack 21-9849
J4 640456-2, MTA 100X2 13-8073
P1 SHIELD-M4500 P 7436-142
L1-L3 470µH, TKS1245 21-9699
L4 56mH 21-9040
T1 32377R, TRANSFORMER 4275-156 21-9925
BOARD Assembled Gas Flow Sensor Board 5420-430
U3 PCA9546AD 06-6803
R15-R23 1K, 100mW, 1% 12-7084
P9 640456-5, MTA 100x5 13-8057
S1-S4 HAFBLF0200C2AX3, Air Flow Sensor 2312068
Ludlum Measurements, Inc. Page 19 September 2018
Model 4906 Series Technical Manual
For Model 4906P Only:
Detector Slave Board,
Drawing 420 x 592
CAPACITORS
Reference Description Part Number
C1 1µf, 16V 04-5846
C2 68µf, 16V-T 04-5768
C3 10µf, 10V 04-5757
C4 0.1µf, 25V 04-5744
C5 1µf, 10V 04-5745
C6 10pf, 100V 04-5749
C7 10µf, 10V 04-5757
C8 0.1µf, 25V 04-5744
C9 10µf, 10V 04-5757
BOARD Assembled Detector Slave Board 5420-592
C10 0.1µf, 25V 04-5744
C11 10pf, 100V 04-5749
C12 10µf, 10V 04-5757
C13 10pf, 100V 04-5749
C14-C15 1µf, 16V 04-5846
C16 0.001µf, 50V 04-5742
C17 0.001µf, 2kV 04-5838
C18 100pf, 100V 04-5743
C19 1µf, 16V 04-5846
C20 47pf, 50V 04-5740
C21 0.1µf, 25V 04-5744
C22 10µf, 10V 04-5757
C23-C27 0.01µf, 500V 04-5747
C28-C29 10µf, 10V 04-5757
C30 0.1µf, 25V 04-5744
C31-C32 0.001µf, 2kV 04-5838
C33-C37 0.01µf, 500V 04-5747
C38 1µf, 16V 04-5846
Ludlum Measurements, Inc. Page 20 September 2018
Model 4906 Series Technical Manual
INTEGRATED
CIRCUITS
VOLTAGE
REGULATORS
DIODES
RESISTORS
Reference Description Part Number
U1 MSP430F5528IRGCT 06-6797
U2 SN74AHC14DR 06-6474
U3 TPS3825-33DBVT 06-6558
U4 OPA2347UA 06-6764
U5 LMI1815 06-6937
U6 LT1304CS8 06-6394
VR1 TPS76133DBVR, 3.3V 100mA 06-6804
CR1 TVS-16V 07-6548
CR2-CR3 SD103AW-13-F 07-6420
CR4-CR8 CMPD2005SLF 07-6468
R1 1K, 100 mW, 1% 12-7084
R2 2.21K, 100mW, 1% 12-7172
R3 1K, 100 mW, 1% 12-7084
R4 10K, 100mW, 1% 12-7083
R5 2.21K, 100mW, 1% 12-7172
R6 49.9OHM, 100mW, 1% 12-7138
R7 1K, 100 mW, 1% 12-7084
R8 2.21K, 100mW, 1% 12-7172
R9 1K, 100 mW, 1% 12-7084
R10 500M, 3kV, 2% 12-7031
R11 499K, 100mW, 1% 12-7091
R12 500M, 3kV, 2% 12-7031
R13 22.1K, 100mW, 1% 12-7094
R14 1K, 100 mW, 1% 12-7084
R15-R16 499K, 100mW, 1% 12-7091
R17 18.7K, 125mW, 1% 12-7051
R18 10K, 100mW, 1% 12-7083
R19 22.1K, 100mW, 1% 12-7094
R20 499K, 100mW, 1% 12-7091
R21 49.9K, 100mW, 1% 12-7200
R22 1K, 250mW, 1% 12-7832
R23 1M, 250mW, 1% 12-7844
R24 100K, 250mW, 1% 12-7834
R25-R26 100K, 100mW, 1% 12-7082
Ludlum Measurements, Inc. Page 21 September 2018
Model 4906 Series Technical Manual
CONNECTORS
TRANSFORMER
MISCELLANEOUS
Model 133-2 Connector/
Resistor Board,
Drawing 2 x 894
RESISTORS
Reference Description Part Number
R27 1M, 100mW, 1% 12-7081
R28 0OHM 12-7194
J2 LP RJ-11 6P 13-9037
T1 32377R 21-9925
L1 470µH, TKS1245 21-9699
BOARD Assembled Model 133-2 Connector/ Resistor Board
5002-894
R1 3.32M, 250mW, 1% 12-7967
Ludlum Measurements, Inc. Page 22 September 2018
Model 4906 Series Technical Manual
Schematics
For All 4906 Series:
Host Board, Drawing 420 x 275 (3 sheets)
Host Board Component Layout, Drawing 420 x 276B
Power/Relay Board, Drawing 540 x 170
Power/Relay Board Component Layout, Drawing 540 x 171A (2 sheets)
Sensor Combiner Board, Drawing 420 x 540
Sensor Combiner Board Component Layout, Drawing 420 x 541
For Model 4906A Only:
Air Alpha Detector Board, Drawing 420 x 520 (3 sheets)
Air Alpha Detector Board Component Layout, Drawing 420 x 521A (2 sheets)
For Model 4906AB Only:
Detector Slave Board, Drawing 420 x 474 (3 sheets)
Detector Slave Board Component Layout, Drawing 420 x 475 (2 sheets)
Gas Flow Control Board, Drawing 420 x 424 (3 sheets)
Gas Flow Control Board Component Layout, Drawing 420 x 425
Gas Frisker Slave Board, Drawing 420 x 427 (4 sheets)
Gas Frisker Slave Board Component Layout, Drawing 420 x 428
Gas Flow Sensor Board, Drawing 420 x 430
Gas Flow Sensor Board Component Layout, Drawing 420 x 431
For Model 4906P Only:
Detector Slave Board, Drawing 420 x 594
Detector Slave Board Component Layout, Drawing 420 x 592 (2 sheets)
Model 133-2 Connector/Resistor Board, Drawing 2 x 894
Model 133-2 Connector/Resistor Board Component Layout, Drawing 2 x 895A
Ludlum Measurements, Inc. Page 23 September 2018
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