NBDP Terminal Repair Guide | PDF | Wireless | Electricity - Scribd
Leave a comment below with your solder tips or which capacitor failed on your unit.
Depress the key on the SRG-1150 front panel, then immediately boot the power toggle on the SN-100 terminal frame. The large 10.4-inch LCD screen should initialize, displaying paired TX/RX parameters. Safe Maintenance and RF Exposure Rules
: Transmission covers 1.6 MHz to 27.5 MHz (in 10 Hz steps); reception spans 500 kHz to 29.9999 MHz. samyung srg 1150 service manual 19
Typically 1st IF at 45.000 MHz (high-order roofing filter) and 2nd IF at 455 kHz (narrow-band filtering). Sensitivity: J3E/F1B: Less than 2.5 µV for a 20 dB SINAD signal. Selectivity: Voice (J3E): 2.4 kHz at -6 dB. Data/DSC (F1B/J2B): 300 Hz at -6 dB. 2. Modular Architecture and Board Layouts
| Parameter | Details | | :--- | :--- | | | 1.6 – 27.5 MHz (10 Hz step) | | Frequency Range (RX) | 500 kHz – 29.9999 MHz (10 Hz step) | | Output Power (SRG-1150DN) | J3E: 150W (High) / 100W (Mid) / 50W (Low) H3E: 75W (High) / 16W (Low) F1B: 100W (High/Mid) / 75W (Low) | | Emission Modes | J3E (USB), H3E (AM), F1B (FSK) | | Channels | ITU channels + 300 user-programmable memory channels | | Power Supply | DC 24V ±15% (Rx: 2.5A, Tx: 15A) | | DSC Watch Frequencies | 2187.5, 4207.5, 6312, 8414.5, 12577, 16804.5 kHz (F1B, 100 baud) | | Dimensions (Main Unit) | 288(W) × 312(H) × 166(D) mm | | Weight | Approximately 8.5 kg | | Operating Environment | -15°C to +55°C, 95% humidity |
A drifted reference oscillator will shift both transmission and reception frequencies off-frequency, leading to failures in decoding DSC text calls and poor voice clarity. NBDP Terminal Repair Guide | PDF | Wireless
Disclaimer: This article provides information based on publicly available service documents (Scribd/RadioManual). Always consult the official, updated manufacturer manual provided by Samyung for specific, safety-critical repairs.
Transmits from 1.6 MHz to 27.5 MHz (10 Hz steps); receives from 500 kHz to 29.9999 MHz .
Before performing any service or calibration, engineers must understand the core technical thresholds of the SRG-1150DN. Safe Maintenance and RF Exposure Rules : Transmission
The is a marine MF/HF radio transceiver designed for ITU channel communications, featuring built-in DSC (Digital Selective Calling) and NBDP (Narrow-Band Direct-Printing) capabilities. 🛠️ Key Technical Specifications Frequency Range: TX: 1.6 MHz to 27.5 MHz (10 Hz steps). RX: 500 kHz to 29.9999 MHz (10 Hz steps). Emission Types: USB (J3E), H3E, and FSK (F1B). Power Supply: DC 24V (Max 40A) or AC 100-240V (Max 3.3KVA).
The receiver appears dead, or sensitivity is dramatically reduced.
[Verify Power Sources] • AC Power (100-240V) • DC Power Battery (24V) │ ▼ [Check Front Panel LEDs] • AC IN, DC IN, DC OUT status │ ▼ ┌────────────────┴────────────────┐ ▼ ▼ [LEDs Off / Blinking] [LEDs Steady On] │ │ ▼ ▼ Check main AC plug and Press [PWR] on main unit; external inline DC fuses check control interconnects
Inject a low-level signal (approx. -90 dBm at the operating frequency) directly into the RX board input. If the signal is processed normally, inspect the preselector band-pass filters and associated switching diodes. Scenario C: No RF Power Output (Transmission Fails)
