131 lines
4.0 KiB
Markdown
131 lines
4.0 KiB
Markdown
# Sony RM-M7G Remote Control Unit
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## Summary
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The Sony RM-M7G is a compact remote control unit for Sony professional SD video
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camera systems. It is commonly associated with the DXC-M7 family, CCU-M7/CCU-M3,
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CCU-M5/M5A, CCU-D50, and several DXC/DSR camera families through the Sony CCA-7
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10-pin remote cable.
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The most repair-useful public source is the 41-page RM-M7G/RM-M7GP service
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manual on ManualsLib.
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Primary source:
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<https://www.manualslib.com/manual/3397442/Sony-Rm-M7g.html>
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Local PDFs:
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- [docs/manuals/rm-m7g.pdf](manuals/rm-m7g.pdf)
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- [docs/manuals/6916f3.pdf](manuals/6916f3.pdf)
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## Known Specifications
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From the RM-M7G service manual:
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- Power requirements: 9 V to 17 V DC.
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- Power consumption: 0.4 W.
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- Monitor connector: BNC, VBS 1.0 Vp-p, 75 ohms.
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- CCU/CAMERA connector: 10-pin.
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- AUX connector: 10-pin.
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- Operating temperature: -5 C to +40 C.
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- Storage temperature: -20 C to +60 C.
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- Dimensions: 86 x 170 x 47 mm.
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- Weight: about 500 g.
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- Supplied accessory: operating instructions.
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## Recommended / Compatible Equipment
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The RM-M7G service manual lists:
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- Video camera: DXC-M7.
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- Camera control cables: CCA-7-5, CCA-7-25, CCA-7-50, CCA-7-100.
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- Camera control units: CCU-M7, CCU-M3.
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- Studio adaptor: CA-M7.
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Other public Sony/camera documentation and product pages also connect the RM-M7G
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to:
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- DXC-D30/D30WS.
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- DXC-D35 family in some CCU-D50 workflows.
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- DXC-327, DXC-537, DXC-637 families depending on camera/adaptor/CCU.
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- DSR-390 and DSR-570WS family camcorders.
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- CCU-M5/M5A and CCU-D50.
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## Controls and Functions
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Public listings describe the RM-M7G as controlling principal camera paint and
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operation functions, including:
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- Gain selection.
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- Output mode selection.
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- VTR start/stop.
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- Iris auto/manual and auto-iris override.
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- Auto/manual/preset white and black balance.
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- White balance memory.
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- R/B gain.
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- Gamma manual/preset.
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- Master pedestal.
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- R/B pedestal.
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- Knee point auto/manual/preset.
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- Panel active handoff when used with compatible CCUs.
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Function availability depends heavily on the camera and CCU/adaptor. For
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example, Sony DXC-327 documentation states some RM-M7G controls do not affect
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output in that system, and some camera-side switches are disabled while the
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remote is connected.
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## Service Manual Contents
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The RM-M7G/RM-M7GP service manual table of contents includes:
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- Adjustments.
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- General description.
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- Location and function of controls.
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- Connections.
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- Adjustments.
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- Service information.
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- Cabinet removal.
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- Connectors and cables.
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- Connector input/output signals.
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- Connections.
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- Block diagram.
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- Semiconductor electrodes.
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- Schematic diagram and board.
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- Spare parts.
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- Parts information.
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- Exploded view.
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This is the best starting point for repair, continuity checks, parts
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identification, and reverse engineering the hardware.
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## Connector Notes
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The rear panel has:
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- MONITOR BNC output for VBS monitoring.
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- CCU/CAMERA 10-pin connector for the camera or CCU via CCA-7 cable.
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- AUX 10-pin connector, described in the manual as reserved for future expansion.
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Important: verify the actual pinout in the service manual before connecting
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custom hardware. Some related Sony manuals describe the broader 10-pin remote
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interface as RS-232C-based/proprietary Sony protocol, but signal names and power
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pins vary by device and generation.
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## Repair Notes
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Good first checks for a dead unit:
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- Confirm 9 V to 17 V DC supply from the camera/CCU on the CCA-7 connector.
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- Inspect the 10-pin connector for bent pins or cracked solder joints.
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- Confirm the CCA-7 cable is pinned straight-through and has no shield/ground
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faults.
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- Check whether the connected camera/CCU requires `PANEL ACTIVE` handoff.
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- If powered but not controlling, confirm the bottom CAMERA SELECT switch
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position for the connected camera/CCU.
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- With CCU-D50/D50P, set the RM-M7G CAMERA SELECT switch to `1`, press
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`PANEL ACTIVE` on the RM-M7G for remote control, and use the CCU front-panel
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`PANEL ACTIVE` button to hand control back to the CCU.
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For board-level repair, use the service manual's schematic/board section rather
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than relying on the operating manuals.
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