1. Introduction
This manual provides instructions for the KRPTQJoo replacement remote control, designed for use with various Sony Mini Hi-Fi Component Systems and audio players. This remote functions as a direct replacement for the original RM-SC3 and other compatible Sony remote controls. It requires no programming or setup; simply insert batteries to begin operation.
2. Product Overview
The KRPTQJoo replacement remote control features a standard layout for controlling Sony audio systems. Familiarize yourself with the buttons and their functions as illustrated below.

Figure 1: Front view of the remote control, showing all buttons including Power, Sleep, Display, Clock/Timer, Select, Set, Tuner Memory, Play Mode/Tuning Mode, Repeat/FM Mode, Tape, CD, Tuner Function, Band, navigation buttons, Play, Pause, Stop, Clear, Enter, EQ, Volume, Disc Skip, and Album controls.

Figure 2: Back view of the remote control, showing the battery compartment cover and ergonomic design.
3. Setup: Battery Installation
The remote control requires two (2) AAA batteries (not included) for operation. Follow these steps to install the batteries:
- Locate the battery compartment on the back of the remote control (refer to Figure 2).
- Slide the battery compartment cover downwards or press the latch and lift to open.
- Insert two AAA batteries, ensuring the positive (+) and negative (-) terminals align correctly with the markings inside the compartment.
- Replace the battery compartment cover by sliding it back into place until it clicks securely.
Note:
- Do not mix old and new batteries.
- Do not mix alkaline, standard (carbon-zinc), or rechargeable (nickel-cadmium) batteries.
- Remove batteries if the remote control will not be used for an extended period.
4. Operating Instructions
This remote control is designed to replicate the functions of your original Sony audio system remote. Point the remote directly at the infrared sensor on your audio system for optimal performance.
Basic Functions:
- Power (I/O) Button: Press to turn the audio system on or off.
- Volume (+/-): Adjusts the audio output level.
- Mute: (If available on your specific remote model) Silences the audio.
- Function Buttons (TAPE, CD, TUNER): Selects the desired audio source.
- Play, Pause, Stop, Fast Forward, Rewind: Controls playback for CD or Tape functions.
- Tuner Memory / Tuning Mode: For radio station selection and storage.
- Display: Changes the information shown on the audio system's display.
- Clock/Timer, Select, Set: Used for setting the clock and timer functions on your audio system.
Note:
The functionality of certain buttons may vary or be unavailable depending on the specific features supported by your Sony audio system model. Refer to your audio system's original manual for detailed function descriptions.
5. Compatibility
This replacement remote control is compatible with a wide range of Sony Mini Hi-Fi Component Systems and audio players. It is designed to replace the RM-SC3 and other compatible remotes. Confirmed compatible models include, but are not limited to:
- HCD-EX660Z, MHC-V3, MHC-V4D, CMT-FX200, HCD-FX205, MHC-EC59, HCD-EC59, CMT-LX10R, HCD-LX10R, MHC-EX66, HCD-EX66, MHC-EX990, HCD-EX990Z, MHC-EX660
- RM-SC30, A1108432A, A1108432B, CMT-GPZ7, CMT-NEZ3, CMT-NEZ30, CMT-NEZ5, HCD-NEZ3, HCD-NEZ30, HCD-NEZ5, MHC-RV2, HMC-RV22, MHC-RX99, CMT-GS10, CMT-NE3, HCD-GX250, HCD-NE3, MHC-HX250, MHC-RG220
If your original remote control is RM-SC3 or one of the listed models, this replacement remote should function correctly without any programming.
6. Troubleshooting
- Remote not responding:
- Ensure batteries are inserted correctly with the correct polarity (+/-).
- Replace old batteries with new AAA batteries.
- Ensure there are no obstructions between the remote control and the audio system's infrared sensor.
- Confirm the remote is pointed directly at the audio system.
- Some buttons do not work:
- This remote is a replacement and may have buttons for functions not present on all compatible Sony audio system models. If your specific audio system does not support a particular feature, the corresponding button on the remote will have no function.
- Refer to your audio system's original manual to confirm supported features.
7. Specifications
- Model Number: RM-SC3 Compatible (Replacement)
- Power Source: 2 x AAA Batteries (not included)
- Color: Black
- Special Feature: Ergonomic design, direct replacement functionality
- Max Number of Supported Devices: 1
- Compatible Devices: Sony Mini Hi-Fi Component Systems and Audio Players
8. Support
For any issues or questions regarding your KRPTQJoo replacement remote control, please contact our customer support. We aim to respond to all inquiries within 12 hours and will do our best to resolve any problems you may encounter.
When contacting support, please provide as much detail as possible, including your specific Sony audio system model number and a description of the issue.