10/1/2016 new driver models for direct download:862
Actebis Pt 1503a 5 stars review"The best driver WIKI ever! I wil keep coming back for sure."Eric Smalter, Boston, MA
Supported languages for Actebis Pt 1503a
Certifications for Actebis Pt 1503a
5 stars for Actebis Pt 1503a "WOW! Finally my PC got up to speed!" Melany Kim 7/18/2015

Checking...for 10/1/2016 Updates

All drivers on are updated on daily basis.

However, a new version of Actebis Pt 1503a might have been uploaded since our last site update.

Actebis Pt 1503a Driver Download

Windows Compatibility for Actebis Pt 1503a driver

Actebis Pt 1503a Driver Details:

Actebis Pt 1503a File Name:

Actebis Pt 1503a Driver Version: 327FIVwj

Actebis Pt 1503a ZIP Size: 108.kb

Manufacturer: Actebis

Actebis Pt 1503a was fully scanned at: 9/30/2016
Scan Status: driver download scanOK

Actebis Pt 1503a special revision for: Windows XP Tablet PC Edition 64 bit, Windows Vista Starter 64 bit, Windows XP Professional N 64 bit, Windows XP Home Edition N 64 bit, Windows XP Starter Edition 32 bit, Windows Vista Home Premium 64 bit, Windows XP Professional x64 Edition 64 bit, Windows 7 Enterprise (Microsoft Windows NT) 32 bit, Windows XP Media Center Edition 32 bit, Windows 8 Pro 32 bit, Windows 7 Service Pack 1 (Microsoft Windows NT) 32 bit, Windows Vista Home Basic 64 bit, Windows 8 64 bit

Actebis Pt 1503a Download Stats:

Driver Uploaded: 9/21/2016

Direct Downloads: 556
Most Recent Download: 9/30/2016
Managed Downloads: 1224
Most Recent Download: 9/29/2016
Download Mirrors: 2
Current Delay: 16 Seconds
Driver License: GNU

Direct Download Success Stats:

Reports Issued By 539/556 Users

Success Reported By 57/539 Users

Driver Download Score69/100

Driver Installation Score60/100

Overall preformance Score60/100

Actebis Pt 1503a 12 Thumbs Up12Thumbs
Actebis Pt 1503a 2 Thumbs Down2Thumbs
Actebis Pt 1503a driver direct download was reported as adequate by a large percentage of our reporters, so it should be good to download and install.

Installation Manager Success Stats:

Reports Issued By 1151/1224 Users

Success Reported By 999/1151 Users

Driver Download Score80/100

Driver Installation Score97/100

Overall preformance Score89/100

Actebis Pt 1503a 943 Thumbs Up943Thumbs
Actebis Pt 1503a 87 Thumbs Down87Thumbs
Actebis Pt 1503a driver installation manager was reported as very satisfying by a large percentage of our reporters, so it is recommended to download and install.


1. Direct Download

Select your OS and press "Download".

This option requires basic OS understanding.
Select Your Operating System, download zipped files, and then proceed to
manually install them.
Recommended if Actebis Pt 1503a is the only driver on your PC you wish to update.


2. Driver Installation Manager

This option requires no OS understanding.
Automatically scans your PC for the specific required version of Actebis Pt 1503a + all other outdated drivers, and installs them all at once.

Please help us maintain a helpfull driver collection.
After downloading and installing Actebis Pt 1503a, or the driver installation manager, take a few minutes to send us a report:
* Only registered users can upload a report.

Don’t have a password?
Please register, and get one.

Actebis Pt 1503a may sometimes be at fault for other drivers ceasing to function

These are the driver scans of 2 of our recent wiki members*

*Scans were performed on computers suffering from Actebis Pt 1503a disfunctions.

Scan performed on 10/1/2016, Computer: IBM 2656D7G

Outdated or Corrupted drivers:7/22

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) 4 Series Chipset Processor to I/O Controller - 2E20Up To Date and Functioning
Mice And Touchpads
Microsoft Microsoft USB IntelliMouse ExplorerCorrupted By Actebis Pt 1503a
Elo TouchSystems USB Human Interface DeviceUp To Date and Functioning
Logitech Logitech Gaming Virtual KeyboardCorrupted By Actebis Pt 1503a
Usb Devices
SafeNet SafeNet Inc. Sentinel HASP KeyUp To Date and Functioning
Thrustmaster Thrustmaster HOTAS Cougar (OUT)Up To Date and Functioning
Sony Ericsson Sony Ericsson W800 USB WMC ModemUp To Date and Functioning
Sound Cards And Media Devices
Realtek Audio Device on High Definition Audio BusUp To Date and Functioning
Creative Creative SB X-FiUp To Date and Functioning
NVIDIA NVIDIA GeForce GTX 675MUp To Date and Functioning
Network Cards
PANTECH PANTECH UM175 WWAN DriverCorrupted By Actebis Pt 1503a
Microsoft HID KeyboardOutdated
Hard Disk Controller
ATI Standard Dual Channel PCI IDE ControllerCorrupted By Actebis Pt 1503a
Brother USB Printing SupportUp To Date and Functioning
Nokia Nokia USB LCIFCorrupted By Actebis Pt 1503a
Nokia Nokia C6-00 USB OBEXUp To Date and Functioning
Cameras, Webcams And Scanners
Canon Canon MG5300 seriesUp To Date and Functioning
Video Cards
Intel(R) HD Graphics 4000Up To Date and Functioning
Input Devices
Logitech USB Input Device (Logitech Download Assistant)Up To Date and Functioning
Port Devices
hspa Modem Application4 port (COM7)Up To Date and Functioning
Sony Digital Flat Panel (1024x768)Up To Date and Functioning
Mobile Phones And Portable Devices
Acer NOKIACorrupted By Actebis Pt 1503a

Scan performed on 10/1/2016, Computer: HP H9-1101es

Outdated or Corrupted drivers:11/19

Device/DriverStatusStatus DescriptionUpdated By Scanner
Intel(R) 82801FB/FBM USB Universal Host Controller - 2659Corrupted By Actebis Pt 1503a
Mice And Touchpads
Microsoft Microsoft Serial BallPointCorrupted By Actebis Pt 1503a
Usb Devices
Energizer Energizer USB ChargerUp To Date and Functioning
Samsung SAMSUNG USB Composite Device V2Up To Date and Functioning
Sound Cards And Media Devices
Pixela Sony Digital TV TunerCorrupted By Actebis Pt 1503a
Realtek High Definition Audio -laiteUp To Date and Functioning
IC Plus Unimodem Half-Duplex Audio DeviceCorrupted By Actebis Pt 1503a
Network Cards
Realtek Generic Bluetooth RadioCorrupted By Actebis Pt 1503a
Microsoft HID KeyboardUp To Date and Functioning
Hard Disk Controller
Intel(R) 82801DB Ultra ATA-Speichercontroller - 24CBUp To Date and Functioning
Texas Instruments Texas Instruments PCIxx21 Integrated FlashMedia ControllerUp To Date and Functioning
Intel(R) 82810 Graphics Controller (Microsoft Corporation)Up To Date and Functioning
Moxa UPort 1150Corrupted By Actebis Pt 1503a
Cameras, Webcams And Scanners
Canon Canon MP495 serUp To Date and Functioning
Video Cards
ATI RADEON X300 Series SecondaryCorrupted By Actebis Pt 1503a
Input Devices
Lenovo USB DeviceCorrupted By Actebis Pt 1503a
Port Devices
Huawei Vodafone Mobile Broadband Secondary Port Modem (Huawei) (COM28)Corrupted By Actebis Pt 1503a
Sony Digital Flat Panel (1024x768)Corrupted By Actebis Pt 1503a
Mobile Phones And Portable Devices
Acer NOKIACorrupted By Actebis Pt 1503a
Driver ModelOriginal Upload DateLast ModificationDriver FileFile SizeCompatible Computer ModelsAvailabilty To Instalation Manager
Actebis Pt 1503a 38073/7/201512/30/2015actebis_pt_1503a-3807.exe199kbToshiba Dynabook Qosmio G10/390LS, HP RX889AAR-ABA a6040, HP 3600, Compaq DQ119A-ABZ S5400IT IT340, Supermicro X9DRW-3LN4F+/X9DRW-3TF+, IBM 8084KGK, NEC PC-LL750GD1K, HP Compaq Mozart CQ50-112eo, Lenovo ThinkCentre M58e, IBM ThinkPad T43, HP EY906AA-ABZ, Dell OptiPlex G1 350Mbr+, Packard Bell PBIPGX, HP Pavilion ze4400, Compaq FR664AA-ABF SR5617FR, LG LS50-AC6U1, Compaq KP296AA-ABE SR5412ES, Sony SVE14112ENB, and more.
Actebis Pt 1503a A2.1229212/1/201412/29/2015actebis_pt_1503a-a2.12292.exe32kbHP PS373AA-B14, Gateway PROFILE3, HP HP ProBook 6550b, HP GN693AAR-ABA m9058, Lenovo 2429B56, Acer TravelMate 8481TG, IBM ThinkPad T43, Sony VGN-SZ13GP_B, IBM 2645CBH, Toshiba SATELLITE L775-13T, LG R580-U.APC3BA9, ARISTO VISION i535, Fujitsu FMVNB16C, Fujitsu FMVF58CMW, Lenovo ThinkPad X1, HP P6210y-ABA NY545AA, NEC PC-VY16MRFJAFUX, and more.
Actebis Pt 1503a V2.133739/5/201412/28/2015actebis_pt_1503a-v2.13373.exe214kbNEC PC-VY20AED5MFA5, NEC PC-LL750FS1SR, LG R490-G.AAH1RE2, Leading Edge LECQ42SOHO, Omni OTC-H3222D00, Seneca Pro52700, Lenovo 20B7S07L00, Sony SVT13136CWS, Fujitsu N6220, IBM 2373K53, PDS Vector CQ, HP HP Compaq nc6230, and more.
Actebis Pt 1503a C1.12462.112/4/201412/30/2015jyywpi-c1.12462.1.exe151kbHP Hp elite hpe410f, NEC EASYNOTE P910401306, IBM 2374SU9, HP 810-019eb, IBM 2389QU2, Lenovo 20B7S07L00, HP HP Pavilion dv9000 GU136EA#ABF, NEC PC-VY21MED5HJW6, Sony VGN-FW148J, Toshiba Dynabook T451/59DB, and more.
Actebis Pt 1503a 6077010/25/201412/30/2015a-60770.exe193kbNEC NEC POWERMATE X8550, Gateway GT4224m, Toshiba SATELLITE C855-23Z, Gateway P-6312 HSN, HP P6-2455eb, IBM 682466A, HP AY627AAR-ABA a4313w, Sony VGN-TZ73B, Sony SVZ13116GXX, HP PY198AV-ABA m7360y, EMachines Emachine E725, NEC PC-VY17FDFER, HP KZ771AA-UUZ, IBM IBM System x3500 M2 Server -[783932M, SAMSUN 770Z5E/780Z5E, Toshiba Satellite C850-B906, Toshiba Dynabook CX/45AB, and more.
Actebis Pt 1503a X1.127421/7/201512/28/2015suxgyj-x1.12742.exe119kbPackard Bell IMedia 8002 EU, HP HP Compaq 6530b, Sony VGN-G11XRN_B, IBM 8303MJ8, NEC EASYNOTE P910R00406, Sony PCG-R505V_BD, Sony VGNZ798Y/X, Toshiba SATELLITE C670-13Q, Lenovo 10385DG, Fujitsu FMVU90LB, HCL Infosystems LUMINA2-LD, THEIS TH-P925/945G7MD-8KS2HV/1024/80/Profi-Towe, and more.
Actebis Pt 1503a 71.142.1012/5/201412/29/2015actebis_pt_1503a-71.142.10.exe51kbFujitsu N6220, Lenovo Lenovo H320 10046, Lenovo ThinkCentre M75e, Lenovo 6458Y6X, Acer Aspire 1820PTZ, HP KZ771AA-UUZ, Sony PCG-GRT170, LG RD510-L.ADV3E8, IBM 23736G4, IBM IBM x3850-[88632RU, ByteSpeed ByteSpeed Laptop UT40, NEC PC-VN570BS1YB, Sony VGN-FW55LF_B, IBM 23739HG, and more.
Actebis Pt 1503a 2.1283812/21/201412/27/2015actebis_pt_1503a-2.12838.exe115kbNEC PC-LL550RG1TB, Omni OTS-8100SD02815, ASUS BM5295, Dimotion LF13Z0077396, IBM IBM System x3200 M2 -[643217G, Gateway DX4870-UB2C, Gigabyte 946GM-S2, HP HP PAVILION DV9000, HP Presario C300, Gateway P-6312 HSN, Panasonic CF-30F3SAXAM, HP Presario R3000, Acer Aspire 1825PTZ, Sony VGX-TP1L, and more.
Actebis Pt 1503a 326979/15/201412/29/2015actebis_pt_1503a-32697.exe30kbAcer AS5732Z, IBM IBM System x3400 M3 Server -[7379KFG, Samsung SQ45/Q70C/P200, Sony PCG-Z1WAMP, IBM 2669W58, HP DF162A-ABH T160, IBM System x3200 M3 -[7327Z29, Toshiba Dynabook T552/36FBK, Lenovo ThinkPad X220 Tablet, Sony VGN-FS35LP, IBM ThinkPad X40, HP KN472AA-ACB, Fujitsu FMVA42EWB, HP AY633AA-ABA p6313w, HP GG692AA-ABZ, Panasonic CF-Y4HW8AXR, Sony VGN-Z47GD_X, Sony PCV-RZ211, Compaq DT176A-ABE S5320ES ES340, and more.
Actebis Pt 1503a 801.1802/13/201512/30/2015actebis_pt_1503a-801.180.exe37kbLenovo ThinkPad X60s, Packard Bell IMEDIA MC 9601, HP RX884AA-ABA m8040, HP KY660AA-ABJ p6170jp, Packard Bell IPower X9110, ADVANC Modelo_A, Acer Aspire AG3731, IBM 842777G, LG S550-GE6AK, Toshiba Libretto U100/190DSW, Toshiba Dynabook Qosmio D711/T3EB, and more.
Actebis Pt 1503a 2.120892/19/201512/30/2015actebis_pt_1503a-2.12089.exe198kbHP NC787AA-AKL s3789d, NEC EASYNOTE PB47S00186, Compaq GC662AA-ABA SR5113WM, HP KX634AA-ABZ, Fujitsu PRIMERGY RX200 S6, HP AX351AW#ABA, Lenovo 3000 J205 Desktop, HP GQ524AA-ABE, Toshiba Dynabook T552/36FBK, Clevo P15xEMx, Compaq Evo N610c, Packard Bell IMEDIA X1300 AIO, HP 810-070ez, Compaq DD377A-ABX 6680 FI110, HP Pavilion ze4600, IBM 831136U, HP KZ241AA-AR6 p6020l, and more.
Actebis Pt 1503a S8270311/8/201412/27/2015actebis_pt_1503a-s82703.exe175kbLG R580-U.APC3BA9, ARISTO VISION i535, Fujitsu FMVNB16C, Fujitsu FMVF58CMW, Lenovo ThinkPad X1, HP P6210y-ABA NY545AA, NEC PC-VY16MRFJAFUX, Gigabyte Z68MA-D2H-B3, IBM 2373WMZ, HP DM150A-ABM A320M, HP Hp workstation xw6000, Sony VGN-CR356_L, ASUS CS6110, Sony VGN-FW45MJ_B, Toshiba SATELLITE C50D-A-10Z, and more.
Actebis Pt 1503a 22971.112/14/201412/28/2015actebis_pt_1503a-22971.1.exe62kbNEC PC-LL750WG1JB, IBM 1872W5A, Acer V3-771, LG LW40-J4JE2, IBM 6221PMG, HP GG698AA-ABH, ASUS CS6110, Lenovo 20B6CTO1WW, Acer Aspire M5800, Acer TravelMate 8531, HP H9-1187, Lenovo IdeaCentre K32010031, Packard Bell IXtreme X9702, LG LW40-J4XP, OEGStone CS-B, Lenovo 1S1680036940055, and more.
Actebis Pt 1503a 2.1024310/21/201412/29/2015actebis_pt_1503a-2.10243.exe190kbPanasonic CF-29NAQC9BM, ARLT Computer Produkte Mr. Gamer 7-11 R2, Samsung 305E4A/305E5A/305E7A, NEC PC-MY18AESETM81, AT TRILINE PROFI I80, Sony VPCEA23EN, IBM 184469U, Fujitsu N6220, HP RY869AA-ABA m8067c, Packard Bell IMEDIA H7612, Gigabyte 945GDS1, Fujitsu FMVL18B, and more.
Actebis Pt 1503a 329691/4/201512/28/2015actebis_pt_1503a-32969.exe82kbGateway M-7332H, MSI VR321, IBM IBM System x3200 M2 -[643217G, TYAN S2895, HP VS243AA-ABD HPE-010de, Panasonic CF-30CTWAZBM, HP P6772l, Sony SVE151100C, IBM 8183GNG, Lenovo ThinkPad R60e, HP HP 500 Notebook PC, Sony PCV-HS72B, Toshiba SATELLITE C855-207, and more.
Actebis Pt 1503a W31.16891/13/201512/27/2015-w31.1689.exe52kbPanasonic CF-53JJCZY1M, Fujitsu ESPRIMO E900 0-Watt, Packard Bell IMEDIA D5230 BE, NEC NEC POWERMATE S8310-2001, Toshiba SP4320, HP Compaq Mozart CQ50-112eo, IBM 8183DGU, HP PX569AA-ABY, Toshiba Dynabook TX/66GPKJ, LG R560-K.ABA6L, IBM 818373G, NEC PC-VK26MDZCE, Gateway MX8734, Toshiba SATELLITE C855-11C, and more.
Actebis Pt 1503a 8272210/6/201412/29/2015actebis_pt_1503a-82722.exe44kbHP S5-1028hk, NEC Express5800/56Xd [N8000-566C, Panasonic CF-74ECBADBM, Lenovo ThinkPad SL500c, IBM 8172QGW, EMachines EL1330, LG LS50-UG5F1, MSI GR620, Lenovo 7661ZRG, HP BK373AA-AB1 HPE-176k, Fujitsu FMVXDE6K2Z, Lanix LANIX CORP 4130, Sony SVE14115FBB, Sony VGN-NS305D, IBM 26523CU, Supermicro X7DBP, HP HP Pavilion ze2000, IBM 842777G, and more.
Actebis Pt 1503a 3229912/11/201412/27/2015cbwun-32299.exe65kbToshiba PSK1SE-005002GR, HP RS898AA-B14, FIC ATM-Q45G, Fujitsu FMVLRA70, HP HP G5000, HP HP Pavilion dv9000 NoteBook PC, ASUS R052CE, HP P9879A-ABG 713a, VMware VMware7,1, Sony VGN-BX94PS, Fujitsu FMVNB18C, Panasonic CF-Y4HW8AXR, Gateway E4252, Gateway MX6422, and more.
Actebis Pt 1503a 803971/25/201512/27/2015actebis_pt_1503a-80397.exe37kbHP KT850AV-ABJ s3540jp, Lenovo ThinkPad Tablet 2, HP EC619AA-ABY, HP PAVILION DV8000, Sony PCG-GRZ615M, Lenovo 9482W86, Standard J10IL105, Toshiba Dynabook TX/77MBLK, HP FQ562AA-A2L m9500f, Sony PCG-Z505SX, Sony VGN-Z41XRD_B, Supermicro X7QC3, HP BK345AA-ACJ p6373i, Lenovo ThinkCentre A70z, Phoenix M671MX+968, NEC PC-VL150GS, Lenovo ThinkCentre M58, NEC VERSAE6300 RNF41103088, and more.
Actebis Pt 1503a F426292/9/201512/29/2015actebis_pt_1503a-f42629.exe193kbToshiba Satellite C855-S5194, HP WX217AV-ABA MS230z, Fujitsu AMILO Desktop La3740, Lenovo 7663V2L, Seneca Pro52700, HP H9-1101es, Epson Endeavor Pro8000-H, Toshiba Dynabook EX1/524CDE, IBM 2525AP5, IBM 2669WCC, Sony VGN-SZ140P, NEC MS-6303, Lenovo 3000 J115 Desktop, LG P1-JPLCY, Acer ASPIRE1420P_MSFT, Lenovo ThinkCentre A52, CDM K9A2VM-FD R01, Sony SVS13125CHB, ASUS Z9PE-D16 Series, and more.
Actebis Pt 1503a B1.1271.1011/20/201412/27/2015actebis_pt_1503a-b1.1271.10.exe147kbSony VGN-SZ32GP_B, IBM PHILIPS, IBM Eserver xSeries 346 -[8840ECY, Toshiba Dynabook CX/47G, HP P6635c, MSI AS-B05011, Gateway FX4710-UB802A, PCSMART PTI1010, Gigabyte EP45T-DS3, Lenovo 7359W4B, Fujitsu FMVMGG70N7, HP VN294AA-UUZ p6210ch, ASUS P5KPL-AM, Medion E5217, IBM 48007X3, Clevo W870CU, MSI GP60 2PE, HP NC047AA-ABU s3714uk, and more.
Actebis Pt 1503a 438471/12/201512/29/2015actebis_pt_1503a-43847.exe193kbPDS Vector CQ, HP HP Compaq nc6230, Compaq Presario 7110US 470016-083, MiTAC 9008D, HP HP ENVY13 Notebook PC, Apple IMac5,1, LIGHTEDGE 965LTCK, Acer Aspire L3600, Sony VGN-Z51MG_B, ASUS 1001PQ, and more.
Actebis Pt 1503a Z21.1871.112/23/201412/27/2015actebis_pt_1503a-z21.1871.1.exe119kbHP GX709AA-ABM s3310la, Fujitsu FMVNA1CE, Hunter Engineering Series WA100/200, Sony VGN-NS31ST_S, HP GN551AAR-ABA m8200, ZOTAC ZBOXNXS-AD11, HP HP Compaq nx7400, HP 3639, HP PS226AA-ABE, Sony VGN-AR11MR, HP 500-129, Fujitsu FMVS54DBY, HP Pavilion G60-418CA, IBM 8124PAT, Toshiba SP4320, and more.
Actebis Pt 1503a R31.1671.19/26/201412/28/2015actebis_pt_1503a-r31.1671.1.exe73kbSony VPCF11E4E, Fujitsu FMVD7BF010, PDS Vector CQ, HP P6210y-ABA NY545AA, HP PS426AA-ABG m1299a, HP WC734AA-ABD 1130de, ALFATRON SpA DN1010/M, HP AU917AA-ABA e9270f, HP P6-2475eo, Toshiba Satellite L650D, Sony VGN-CS36TJ_U, Lenovo ThinkPad W510, Samsung Q320/P320, Gigabyte X58A-OC, Nvidia MCP7A-ION, HP HP ENVY TS 17 Notebook PC, LG B15MS.ASQNBDE, Lenovo ThinkPad T430, Exper ACTIVEDEX144, and more.
Actebis Pt 1503a 32.18011/22/201412/27/2015actebis_pt_1503a-32.180.exe41kbHP HP Pavilion g6-1b34ca, Toshiba NB100, Positivo POS-ECIG31BT, IBM 808735M, PDS Vector CQ, HP RA933AA-ABZ, Compaq FR604AA-ABF SR5529FR, Packard Bell IMEDIA D7010 NL, RM Plc RM ECOQUIET 630A, NEC NEC POWERMATE S8310-2001, Medion P8613, and more.
Actebis Pt 1503a 71.146412/16/201412/27/2015lkejcxw-71.1464.exe58kbHP Compaq 516, Lenovo ThinkPad X201, Fujitsu FPC03080AL, Sony VGNSR499PCB, HP BK373AA-AB1 HPE-176k, Lenovo ThinkCentre M55, HP PX643AA-ABZ, Toshiba Dynabook R732/E25HR, ASUS ET2400IGTS-H61, Lenovo ThinkPad Edge E130, HP FR471AA-UUW a6655sc, and more.

Please Note: There are particular operating systems known to have problems with Actebis Pt 1503a:
  • Windows XP Media Center Edition
  • Windows 10
  • Windows XP Media Center Edition 2005
If you encounter problems with the direct download for these operating systems, please consult the driver download manager for the specific Actebis Pt 1503a model.
Laptop Actebis Pt 1503aTablet Actebis Pt 1503aDownload Actebis Pt 1503aUpgrade Actebis Pt 1503aUpdate Actebis Pt 1503a2016 Actebis Pt 1503aFree Actebis Pt 1503aData Actebis Pt 1503aInfo Actebis Pt 1503aHelp Actebis Pt 1503aGuide Actebis Pt 1503aComments Actebis Pt 1503aWindows 10 Actebis Pt 1503aVista Actebis Pt 1503aWindows 7 Actebis Pt 1503aInstall Actebis Pt 1503a