Arclight-MCP-Bot: Create CVM-1225 from Sony service manual

2026-08-10T12:36:23Z

Create CVM-1225 from Sony service manual

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{{CRT model
|brand=Sony
|model_code=CVM-1225
|market=USA
|product_line=Trinitron
|crt_type=Professional monitor
|form_factor=Standard
|screen_size_in=12
|aspect_ratio=4:3
|tube_type=Trinitron
|chassis=SCC-29A-A
|mask_type=Aperture grille
|deflection_angle=90
|av_system=NTSC
|tuner_system=NTSC-M
|frequency=60Hz
|power_avg=85
|speaker_type=Mono
|speaker_watts=1.2W
}}
The '''Sony CVM-1225''' is a 12-inch NTSC Trinitron colour monitor with a built-in television tuner, sold in the United States on chassis SCC-29A-A.<ref name="sm">Sony CVM-1225 Service Manual, Sony Corporation. https://archive.org/details/sony-cvm-1225-service-manual</ref>

The picture tube is a 12-inch, 90-degree deflection Trinitron driven by a red, green and blue cathode drive system. The set is a hybrid design of its era, built from 60 transistors, 32 diodes, 3 thermistors, one posistor and just 3 integrated circuits.<ref name="sm" />

The tuner covers the American TV standards across VHF channels 2–13 and UHF channels 14–83. Antenna inputs are 300-ohm balanced for both bands — a dipole antenna plus external terminals for VHF, and a loop antenna plus external terminals for UHF.<ref name="sm" /> The IF strip has three stages with one double-tuned and three single-tuned elements, working at a 45.75 MHz picture carrier, 42.17 MHz colour subcarrier and 41.25 MHz sound carrier, with a 4.5 MHz intercarrier sound system.<ref name="sm" />

== Features ==

Beyond the tuner, the CVM-1225 takes external video two ways. An 8-pin EIAJ connector accepts composite video at 1 Vp-p with negative sync into 75 ohms unbalanced together with audio at 0 dB into high impedance, and simultaneously provides a video output at the same level plus an audio output at −20 dB into less than 1 kilohm.<ref name="sm" /> A separate LINE IN video connection uses a UHF-type coaxial connector at the same 1 Vp-p, 75-ohm unbalanced standard, with audio on a minijack; matching TV OUT and MONITOR OUT UHF connectors carry video back out, and a TV OUT minijack carries audio at 0 dB into less than 1 kilohm.<ref name="sm" />

Sound is delivered at 1.2 W for 10% harmonic distortion through an 8 × 12 cm (3¼ × 4¾ inch) 8-ohm speaker. The monitor runs from 120 V AC at 60 Hz and consumes 85 W.<ref name="sm" />

== References ==
<references />
{{CRT voltage range
|voltage_min=120
|voltage_max=120
}}
{{CRT input
|label=VTR
|signal=Composite (CVBS)
|connector=EIAJ-8
|count=1
|audio=Mono
|audio_connector=EIAJ-8
|location=rear
|notes=Sony 8-pin connector carrying composite video at 1 Vp-p, sync negative, 75 ohms unbalanced, plus audio at 0 dB into high impedance. The same connector also carries video and audio outputs.
}}
{{CRT input
|label=VHF
|signal=RF
|connector=RF (300Ω twin-lead)
|count=1
|audio=Mono
|location=rear
|notes=300-ohm balanced terminals for VHF channels 2–13, fed by the supplied dipole antenna or an external antenna.
}}
{{CRT input
|label=UHF
|signal=RF
|connector=RF (300Ω twin-lead)
|count=1
|audio=Mono
|location=rear
|notes=300-ohm balanced terminals for UHF channels 14–83, fed by the supplied loop antenna or an external antenna.
}}
{{CRT output
|label=VTR
|output_type=Video
|signal=Composite (CVBS)
|connector=EIAJ-8
|count=1
|location=rear
|notes=Composite video at 1 Vp-p, sync negative, 75 ohms unbalanced on the 8-pin connector, with audio at −20 dB into less than 1 kilohm.
}}

Sony CVM-1225 - Revision history

Arclight-MCP-Bot: Create CVM-1225 from Sony service manual