Question about Computers & Internet

6 Answers

Cable modem 315

Im having some trouble with some different types of modems RCA DCM 315 I'm looking for he scamatic power supply because it doesnt turn on.

Posted by on

  • 1 more comment 
  • j_guillot Oct 13, 2008

    Im having some trouble with some different types of modems RCA DCM 315 I'm looking for he scamatic power supply because it doesnt turn on.

  • j_guillot Oct 13, 2008

    Im having some trouble with some different types of modems RCA DCM 315 I'm looking for he scamatic power supply because it doesnt turn on.

  • j_guillot Oct 25, 2008

    I still cant find an answer for my problem Im still trying to fix the RCA cable modem 315, But they're off at all times it doesnt turn on. Its not a power supply problem, its the actual modem.

×

6 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 535 Answers

Take your modem on nearest electronic store they will gave you same votlage of power supply of your modem 

Posted on Oct 13, 2008

  • sandip panchal
    sandip panchal Oct 24, 2008

    take your modem on nearest electronic store they will gave you same votlage of power supply of your modem

×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 435 Answers

Hi, Any 12V DC of about 750 mA with a similar pin like this should be fine.
http://cachepe.zzounds.com/media/quality,85/brand,zzounds/fit,400by400/DNPRKPWA1-0bdb4ca99dc1c1528aefaa6141887696.jpg

I hope this is what you meant by power supply scheme.
:)

Posted on Oct 13, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi,

To my understanding:

  • Your concern repair cable modem(s) particularly RCA DCM315.
  • Your requirement schematic diagram of power supply.
  • The main issue, modem will not power up.
The power supply of most (but not all cable modem) is a wall adapter. Common output is 12 volts at about 1 ampere. The basic design is a small transformer, bridge or fullwave diodes and a capacitor. Newer designs uses an SMPS type. To my understanding, an RCA RCA DCM315 uses a similar adapter but not 12 volts @ 800mA. Internally, basic cable modem regulates the raw power from the adapter to 1.2, 3.3 and 5 volts. Most (but again not all) would be using a single chip CX24943 IC. This IC triggers the LED illumination. So, it may be that the cable modem is receiving power and regulating it, but if this IC will not trigger the LEDs, then in appearances, the modem will not power up making the problem not a power supply issue..

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Oct 13, 2008

  • Louie  Role
    Louie Role Oct 25, 2008

    Hi again,

    Your post on Oct 25 " Its not a power supply problem, its the actual modem".

    My post on Oct 13. "the problem not a power supply issue". Pls confirm if the RCA 315 uses an CX24943 IC If yes, have you checked for the presence of 1.2, 3.3 and 5 volts ?



×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 208 Answers

Hi,

I hope the link given below will be useful........It has user manual and troubleshooting steps too........
click here

If the above doent solve the problem.....I request you to give a brief description of the problem....
Waiting for the comments........


Posted on Oct 13, 2008

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,124 Answers

This are your model data

RCA DCM315

MODEL NUMBER: DCM315

STANDARDS

DOCSIS 2.0 Compliant

Field Upgradeable to 2.1 SW

RECEIVER

Downstream Modulation: 64/256 QAM

Frequency Range: 88-860 MHz

Channel Bandwidth: 6 MHz

Maximum Upstream Data Rate: 27/38 Mbps {64 QAM/256QAM}

RF Input Sensitivity: +15 to -15 dBmV

64 QAM:>23.5 dB, 256 QAM:>30dB: BER 1e-8

Input Impedance: 75 Ohms

TRANSMITTER

Frequency Range: 5-42 MHz

Upstream Modulator: QPSK/16QAM

Mainstream Upstream Data Rate: 38.00/38.00 Mbps (QPSK/16QAM)

RF Output Level: +8 to +58 dBmV

Automatic Level Adjust

Gain Control Range: 50 dB

Frequency Stability: ±5 kHz

Output Impedance: 75 Ohms

SOFTWARE FEATURES

Software Downloadable

Protocol Filtering: Ethernet & IP

SNMP Management: V2, V3

Security: BPI

LED Diagnostics: 5-Step LED

http Server (CM status)

SPECIFICATIONS

Dimensions: 5 4/5" H x 2 7/25" D x 6" W

Approx. Shipping Weight: 4 Lbs.

Operating Temp.: 0 to +40C

I/O INTERFACES

Ethernet 10 Base-T or 100 Base-T: RJ45-Autodetect

RF Connector: F-Type

Number of PCs Supported: 32

USB Port, OS Supported - Windows: 98SE, 2000, Me and XP

USB Port, OS Supported - MAC: OS8, OS9, and OS10

User Switches: On/Off & Reset


Your power supply model Number
SY-09080-17 Power Supply for RCA DCM315 Modems

Your compatible products

http://www.broadbandproducts.com/network_powersupplies.html


You can buy one here:

http://cgi.ebay.com/RCA-DCM-315-Digital-Cable-Modem-Stop-Renting-Plastic_W0QQitemZ200257152620QQcmdZViewItem?_trksid=p3286.m20.l1116

Posted on Oct 13, 2008

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,550 Answers

Have a look at the link below for basic troubleshooting techniques for RCA modem

Troubleshooting DCM 315

Posted on Oct 13, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I accidentally knocked the AC adapter to my RCA DCM425 Cable Modem AC out of the wall outlet while at my computer desk. After plugging it back in, the lights on the modem flashed on momentarily, then shut...


You could have only a damaged power supply, please look in an Eectronics parts store another with the same characteristics (input and output voltage,current, plug type) and retest, maybe your actual AC adaptor is broken inside and that's why it doesn't power up your modem correctly.

Feb 19, 2011 | RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

1 Answer

Comcast is my service provider and I have had an RCA DCM 245R modem for almost 10 years. Until recently it has worked fine. On an ever increasing basis I am losing internet connection and when I look at...


Hi,

It can be an issue with the modem or with the line. When the line drops the link then the modem shows only two lights. And, when you power cycle the modem (unplug and replug it) it establish the session again with the comcast.

So, i'll suggest you to get the line checked first and if comcast finds that line is working fine then get the modem replaced.

Rashish

Aug 15, 2010 | Thomson RCA DCM245R Modem

1 Answer

How do I lock my modem using password?


You open up Internet Explorer and type in your i.p address, example : 192.168.0.2, you can normally find your i.p address in network connections, and open the internet connection up, and click on details and your i.p address should be there. once you are on your ip address settings, click wireless settings and then there should be security options, and then you can put security on.

Reply back if this doesnt work.

Thanks.

Jul 18, 2009 | D-Link DCM-202 Cable Modem - RETAIL...

1 Answer

Can't get Linksys wireless router & RCA DCM 425 to work together


ok, ur old modem was configured for those two devices to work to gether
so u have to do the same here

*have ur modem connected directly to ur comptie
*go to ur command prompt if u have vista ( start * search * type cmd)
xp (run then type cmd)
the type in the screen that poped up ( ipconfig) enter
*look for default gateway type that in ur browser address
*should take u in ur modem interfase go to (advandced | PPPlocation | then set that modem on
BRIDGE MODEM and the modem should restart then connect router that should do it

GOOD LUCK
,July

rate my service please








Apr 11, 2009 | RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

1 Answer

Is my modem a WiFi router?


This RCA DCM 425 is a cable modem only its not even a router, its just a plain cable modem that is being provided by some cable company like Cox and Comcast, try searching again for a different box there they have a brnad name of Linksys, Netgear or Dlink because those are the common manufacturer of wireless router ...

Hope that helps............

Sep 18, 2008 | RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

1 Answer

No connectivity from 1 laptop but connectivity with another`


Try resetting the modem whenever you change between those PC's some NIC's will hang a cable modem stuck on an address.

May 02, 2008 | RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

2 Answers

Cable Modem Speed


yea certainly it will support as it has a WAN throughput: 38 Mbps however the download speed will fluxtuate from 9 mb to 11 mb......u wont have exactly 12 mb download speed/....oki

Aug 15, 2007 | Microsoft RCA CABLE INTERNET MODEM MODLE...

1 Answer

Rca cable modem...


This one is for a DCM 315, it should be pretty close and might work. http://a1212.g.akamai.net/7/1212/6718/20030131/comcast.download.akamai.com/6718/help/cmdrivers/RCA_315.zip

Jun 20, 2007 | RCA Cable Modem DCM315R (11603540)

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

610 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18384 Answers

kakima

Level 3 Expert

102366 Answers

David Payne
David Payne

Level 3 Expert

14161 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...