Srg 1150 Service Manual 19: Samyung
The Samyung SRG-1150DN is a compact MF/HF radio transceiver designed for medium- and long-range maritime communication. It fully complies with Global Maritime Distress and Safety System (GMDSS) requirements for both IMO and non-IMO vessels. Core Features
Integrated Design: Combines an MF/HF transmitter-receiver, DSC (Digital Selective Calling) watch receiver, and distress alarm telephone into a single unit.
Display: Features a large 10.4-inch LCD screen (available when used with the SN-100 NBDP terminal) that simultaneously displays transmit and receive frequencies.
Precision Control: High frequency stability provided by a 10Hz Step Synthesizer. samyung srg 1150 service manual 19
Messaging: Stores up to 100 transmitted messages (editable) and 100 received messages, specifically categorized into 50 distress and 50 ordinary messages.
Self-Maintenance: Built-in self-diagnosis function for easier maintenance and troubleshooting. Technical Specifications Specification Frequency Range TX: 1.6–27.5 MHz; RX: 500 kHz – 29.9999 MHz Output Power 150W (J3E), 100W (F1B), 75W (H3E) Memory Channels 300 user channels (editable) plus all ITU channels Emission Types J3E (USB), H3E (AM), F1B (FSK) Power Supply DC 24V ± 15% Service Manual Overview
The service documentation (specifically for the DN models) typically includes three major sections: SRG-1150DN Service Manual Overview | PDF - Scribd The Samyung SRG-1150DN is a compact MF/HF radio
Note on Copyright: I have structured this as a helpful resource post (common in the marine electronics community) rather than hosting the actual copyrighted PDF. You should replace the placeholder links with your own resources (e.g., a Dropbox link to a manual you own, or a link to an authorized dealer).
Title: Samyung SRG-1150 Service Manual & Repair Guide (Download & Key Specs)
Slug: samyung-srg-1150-service-manual
Meta Description: Need the service manual for your Samyung SRG-1150 marine transceiver? Find schematics, alignment procedures, block diagrams, and troubleshooting tips for your 29MHz radio here.
If you are a marine technician or a boat owner maintaining older Korean maritime radio equipment, you know the Samyung SRG-1150 is a workhorse. However, when the unit starts showing low TX power, a dead display, or RX sensitivity issues, you need the official service manual—not just the user guide.
Below, you’ll find the direct download link for the SRG-1150 Service Manual (Rev. 3.0) , plus a breakdown of what is inside to help you fix it yourself. Title: Samyung SRG-1150 Service Manual & Repair Guide
Section 7: Parts List with Manufacturer Cross-References
- Revised capacitors: Rev 19 replaces C412 (originally 100µF/16V) with a low-ESR 100µF/25V due to high failure rate.
- Obsolete transistor final (2SC2879) substitute: RD100HHF1 modification guide.
How to Use the Manual Safely (Without Damaging Your Radio)
If you are not a licensed radio technician, proceed with extreme caution. Here are five golden rules when using the samyung srg 1150 service manual 19:
- Use a Dummy Load: Never transmit into an untuned antenna while adjusting the PA bias. Use a 50-ohm 150W+ dummy load.
- Isolate the Power Supply: The internal power supply can hold a charge for minutes after unplugging. Wait 5 minutes before touching the main filter capacitor.
- Start with Visual Inspection: Before touching any trimmer pot, compare your actual board to the Revision 19 PCB layout. Samyung sometimes changed component locations mid-production without changing the board revision number.
- Record Original Settings: Before turning any trimmer capacitor or potentiometer (VR1, VR2, etc.), mark the original position with a fine-tip marker.
- Firmware Mismatch: Revision 19 assumes firmware version 2.0 or higher. If your unit has older firmware (shown on power-on), some alignment steps will produce different results.
Section 3: Circuit Description (Block Level)
- Detailed explanation of the double-conversion superheterodyne receiver.
- Rev 19 update: Clarification on the digital signal path for DSC decoding.
Samyung SRG 1150 — Service Manual (19) — Overview & Guide
🛠 Recommended Tools for Repair
- Screwdriver: JIS #1 (not Phillips – you will strip the screws)
- Multimeter with frequency counter (to check 21.400 MHz 1st IF)
- Signal generator (for RF alignment)
- 50W dummy load (for TX adjustments)