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RCA 21B042: Difference between revisions

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The '''RCA 21B042''' is a 21-inch CRT television manufactured by RCA. It features a traditional 4:3 aspect ratio display and includes AV outputs and a headphone jack.
{{CRT model
{{CRT model
|brand=RCA
|brand=RCA
|oem=
|model_code=21B042
|model_code=21B042
|crt_type=TV
|crt_type=TV
|image_main=
|images=
|model_3d=
|screen_size_in=21
|screen_size_in=21
|aspect_ratio=4:3
|aspect_ratio=4:3
|tvl=
|tube_type=Standard
|standards_semantic=NTSC
|height=18.5 in
|height=18.5 in
|width=23.2 in
|width=23.2 in
|depth=17.9 in
|depth=17.9 in
|weight=48.7 lbs
|weight=48.7 lb
|tube_type=
|chassis=
|remote_control=
|tube=
|standards_semantic=NTSC
}}
}}
== Inputs ==
{{CRT input
{{CRT input
|signal=Composite
|signal=RF
|connector=RCA
|connector=RF (F-type)
|count=1
|count=1
|sync=
|location=rear
|location=rear
|notes=Video Input
|notes=Antenna/CATV input, 181 channel tuner
}}
{{CRT input
|signal=Audio
|connector=RCA
|count=1
|sync=
|location=rear
|notes=Audio Input (Mono)
}}
{{CRT input
|signal=Composite
|connector=RCA
|count=1
|sync=
|location=side
|notes=Side Video Input (AV2)
}}
}}
{{CRT input
{{CRT input
|signal=Audio
|signal=Composite (CVBS)
|connector=RCA
|connector=RCA (connector)
|count=1
|count=1
|sync=
|location=side
|notes=Side Audio Input (AV2) (Mono)
}}
{{CRT input
|signal=RF
|connector=F
|count=1
|sync=
|location=rear
|location=rear
|notes=Antenna/CATV input, 181 channel tuner (VHF 2-13, UHF 14-69, CATV 1-125)
|notes=Video Input with mono audio
}}
}}
{{CRT input
{{CRT input
|signal=Audio
|signal=Composite (CVBS)
|connector=3.5mm
|connector=RCA (connector)
|count=1
|count=1
|sync=
|location=side
|location=side
|notes=Headphone output
|notes=Side Video Input (AV2) with mono audio
}}
{{CRT link
|link_type=Retailer
|link_source=ManualsLib
|link_url=https://www.manualslib.com/manual/887714/Rca-14b042.html
}}
}}


==Overview==
== Outputs ==
The RCA 21B042 is a 21-inch CRT television manufactured by RCA. It features a traditional 4:3 aspect ratio display and supports NTSC standard definition video. Unlike its smaller 14B042 sibling, this model includes additional connectivity options including AV outputs and a headphone jack.
* Composite video output (rear)
* Audio output (rear, mono)
* Headphone output (3.5mm jack, side)


==Specifications==
Note: The side AV jacks (AV2) cannot be used simultaneously with the rear AV jacks.
* '''Display:''' 21" CRT (measured diagonally)
* '''Color System:''' NTSC
* '''Power:''' 90-140V AC, 50Hz/60Hz @ 80 watts
* '''Audio Output:''' 2x2 Watts
* '''Speaker:''' 18 ohm/7W
* '''Tuner:''' 181 Channel Quartz PLL Frequency Synthesized
* '''Remote Control:''' 24 Button remote with 2 x AAA batteries


==Features==
== Features ==
* 181-channel tuner supporting VHF (2-13), UHF (14-69), and CATV (1-125) channels
* 181-channel tuner supporting VHF (2-13), UHF (14-69), and CATV (1-125) channels
* On-screen menu system
* On-screen menu system
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* Parental controls (V-Chip)
* Parental controls (V-Chip)
* Front panel controls
* Front panel controls
* Mono audio system
* Mono audio system (2×2 Watts)
* Headphone output
* 18 ohm/7W speaker
* AV outputs for recording or daisy-chaining
* 24-button remote control


==Connections==
== Specifications ==
* 1x RF input (F-connector) for antenna/cable
* Power: 90-140V AC, 50Hz/60Hz @ 80 watts
* 2x Composite video inputs (1 rear, 1 side)
* Tuner: Quartz PLL Frequency Synthesized
* 2x Audio inputs (1 rear, 1 side, both mono)
* 1x Composite video output (rear)
* 1x Audio output (rear, mono)
* 1x Headphone output (3.5mm jack, side)


Note: The side AV jacks (AV2) cannot be used simultaneously with the rear AV jacks.
== Known Issues ==
* Susceptible to permanent image burn-in from static images
* Side and rear AV inputs cannot be used simultaneously


==Known Issues==
== Related Models ==
* Susceptible to permanent image burn-in from static images (video games, logos, etc.)
* [[RCA 14B042]] - 14" version
* Side and rear AV inputs cannot be used simultaneously


==Service Information==
== Archival Links ==
* Service manual reference: TOCOM 1640641B
{{CRT link
|link_type=Database
|link_source=CRT Database
|link_url=https://crtdatabase.com/crts/rca/rca-21b042
}}


[[Category:CRT models]]
[[Category:RCA CRTs]]
[[Category:RCA CRT models]]
[[Category:21-inch CRTs]]
[[Category:21 inch CRTs]]
[[Category:4:3 CRTs]]
[[Category:NTSC CRTs]]

Revision as of 16:48, 10 January 2026

The RCA 21B042 is a 21-inch CRT television manufactured by RCA. It features a traditional 4:3 aspect ratio display and includes AV outputs and a headphone jack.

RCA 21B042
CRT › TV
Overview
Brand
RCA
Model
21B042
Type
TV
Screen size
21″
Aspect ratio
4:3
ECID
EC434
Dimensions
H × W × D
18.5 in × 23.2 in × 17.9 in
Weight
48.7 lb22.09 kg <br /> / 22.09 kg48.7 lb <br />
Inputs
Rear
1×Composite (CVBS) (RCA (connector))
Video Input with mono audio
1×RF (RF (F-type))
Antenna/CATV input, 181 channel tuner
Side
1×Composite (CVBS) (RCA (connector))
Side Video Input (AV2) with mono audio
Accessories
Parts
Documents
Contribute

Inputs

Outputs

  • Composite video output (rear)
  • Audio output (rear, mono)
  • Headphone output (3.5mm jack, side)

Note: The side AV jacks (AV2) cannot be used simultaneously with the rear AV jacks.

Features

  • 181-channel tuner supporting VHF (2-13), UHF (14-69), and CATV (1-125) channels
  • On-screen menu system
  • Sleep timer
  • Closed captioning support
  • Parental controls (V-Chip)
  • Front panel controls
  • Mono audio system (2×2 Watts)
  • 18 ohm/7W speaker
  • 24-button remote control

Specifications

  • Power: 90-140V AC, 50Hz/60Hz @ 80 watts
  • Tuner: Quartz PLL Frequency Synthesized

Known Issues

  • Susceptible to permanent image burn-in from static images
  • Side and rear AV inputs cannot be used simultaneously

Related Models

Archival Links

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