Sony RM-M7G Remote Control Unit

Summary

The Sony RM-M7G is a compact remote control unit for Sony professional SD video camera systems. It is commonly associated with the DXC-M7 family, CCU-M7/CCU-M3, CCU-M5/M5A, CCU-D50, and several DXC/DSR camera families through the Sony CCA-7 10-pin remote cable.

The most repair-useful public source is the 41-page RM-M7G/RM-M7GP service manual on ManualsLib.

Primary source: https://www.manualslib.com/manual/3397442/Sony-Rm-M7g.html

Local PDFs:

Known Specifications

From the RM-M7G service manual:

Power requirements: 9 V to 17 V DC.
Power consumption: 0.4 W.
Monitor connector: BNC, VBS 1.0 Vp-p, 75 ohms.
CCU/CAMERA connector: 10-pin.
AUX connector: 10-pin.
Operating temperature: -5 C to +40 C.
Storage temperature: -20 C to +60 C.
Dimensions: 86 x 170 x 47 mm.
Weight: about 500 g.
Supplied accessory: operating instructions.

Recommended / Compatible Equipment

The RM-M7G service manual lists:

Video camera: DXC-M7.
Camera control cables: CCA-7-5, CCA-7-25, CCA-7-50, CCA-7-100.
Camera control units: CCU-M7, CCU-M3.
Studio adaptor: CA-M7.

Other public Sony/camera documentation and product pages also connect the RM-M7G to:

DXC-D30/D30WS.
DXC-D35 family in some CCU-D50 workflows.
DXC-327, DXC-537, DXC-637 families depending on camera/adaptor/CCU.
DSR-390 and DSR-570WS family camcorders.
CCU-M5/M5A and CCU-D50.

Controls and Functions

Public listings describe the RM-M7G as controlling principal camera paint and operation functions, including:

Gain selection.
Output mode selection.
VTR start/stop.
Iris auto/manual and auto-iris override.
Auto/manual/preset white and black balance.
White balance memory.
R/B gain.
Gamma manual/preset.
Master pedestal.
R/B pedestal.
Knee point auto/manual/preset.
Panel active handoff when used with compatible CCUs.

Function availability depends heavily on the camera and CCU/adaptor. For example, Sony DXC-327 documentation states some RM-M7G controls do not affect output in that system, and some camera-side switches are disabled while the remote is connected.

Service Manual Contents

The RM-M7G/RM-M7GP service manual table of contents includes:

Adjustments.
General description.
Location and function of controls.
Connections.
Adjustments.
Service information.
Cabinet removal.
Connectors and cables.
Connector input/output signals.
Connections.
Block diagram.
Semiconductor electrodes.
Schematic diagram and board.
Spare parts.
Parts information.
Exploded view.

This is the best starting point for repair, continuity checks, parts identification, and reverse engineering the hardware.

Connector Notes

The rear panel has:

MONITOR BNC output for VBS monitoring.
CCU/CAMERA 10-pin connector for the camera or CCU via CCA-7 cable.
AUX 10-pin connector, described in the manual as reserved for future expansion.

Important: verify the actual pinout in the service manual before connecting custom hardware. Some related Sony manuals describe the broader 10-pin remote interface as RS-232C-based/proprietary Sony protocol, but signal names and power pins vary by device and generation.

Repair Notes

Good first checks for a dead unit:

Confirm 9 V to 17 V DC supply from the camera/CCU on the CCA-7 connector.
Inspect the 10-pin connector for bent pins or cracked solder joints.
Confirm the CCA-7 cable is pinned straight-through and has no shield/ground faults.
Check whether the connected camera/CCU requires PANEL ACTIVE handoff.
If powered but not controlling, confirm the bottom CAMERA SELECT switch position for the connected camera/CCU.
With CCU-D50/D50P, set the RM-M7G CAMERA SELECT switch to 1, press PANEL ACTIVE on the RM-M7G for remote control, and use the CCU front-panel PANEL ACTIVE button to hand control back to the CCU.

For board-level repair, use the service manual's schematic/board section rather than relying on the operating manuals.

4.0 KiB Raw Permalink Blame History