Sony CRF-230 Radio User Manual

The Sony CRF-230 is a versatile shortwave radio receiver featuring AM/FM/SW bands, digital tuning with PLL synthesizer, 40 memory presets, direct frequency input, built-in speaker, headphone jack, external antenna port, clock with alarm, sleep timer, and battery/AC power operation. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Antennas 7. Operating Modes 8. Memory Functions 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital display, tuning knob, mode selector, memory buttons, power switch, antenna input, headphone jack, AC adapter port.

Feature	Description
Frequency Range	AM: 530-1710 kHz, FM: 87.5-108 MHz, SW: 2.3-26.1 MHz
Tuning System	PLL Synthesizer with digital display
Memory Presets	40 stations (AM/FM/SW)
Antenna Input	External antenna jack for SW reception
Headphone Jack	3.5mm stereo output for private listening
Power Source	AC adapter or 4 x D batteries
Clock & Alarm	Digital clock with daily alarm function
Sleep Timer	Auto power-off (15-90 minutes)
Tuning Steps	AM: 9/10 kHz, FM: 50/100 kHz, SW: 5 kHz
Audio Output	Built-in speaker (8Ω, 0.5W)

Installation

Unpack and inspect contents. Place on stable, dry surface away from heat sources.

Install batteries: Open battery compartment, insert 4 D cells observing polarity.
Connect AC power: Use supplied adapter (DC 6V); plug into wall outlet.
Extend telescopic antenna: Fully extend for FM/SW reception.
Connect external antenna: For SW, attach wire antenna to external jack.

WARNING! Use only specified AC adapter. Do not mix old and new batteries.

First-Time Setup

Power on radio; set initial parameters.

Set clock: Press CLOCK button, use tuning knob to set time, press again to confirm.
Select band: Rotate BAND selector to AM, FM, or SW.
Tune station: Use tuning knob or direct frequency entry.
Adjust volume: Turn VOLUME control to desired level.
Set tuning step: Hold TUNING MODE to select appropriate step for region.

CAUTION! Avoid placing near other electronic devices to prevent interference.

Specifications

Frequency Coverage: AM (MW): 530-1710 kHz, FM: 87.5-108 MHz, SW: 2.3-26.1 MHz.
Tuning System: PLL frequency synthesizer.
Memory: 40 preset stations (volatile, requires battery backup).
Audio Output: 0.5W at 8Ω (internal speaker), 30mW at 32Ω (headphones).
Power Requirements: DC 6V (AC adapter) or 4 x D batteries (1.5V each).
Battery Life: Approx. 50 hours at normal volume.
Dimensions: 320 x 185 x 95 mm (W x H x D).
Weight: 1.8 kg (without batteries).
Operating Temperature: 0°C to 40°C.

Controls and Settings

Front Panel: POWER switch, BAND selector, TUNING knob, VOLUME control, DISPLAY button.

Buttons: MEMORY, RECALL, CLOCK, ALARM SET, SLEEP, TUNING MODE, DIRECT FREQUENCY keys (0-9).

Tuning: Manual (knob) or direct entry. Display: Shows frequency, time, band, memory number. Clock Functions: Time display, alarm setting, sleep timer (15-90 min). Audio: Tone control (TONE button cycles through settings). Memory Operations: Store current frequency to memory number 1-40.

Connecting Antennas

Internal: Telescopic antenna for FM/SW. External: Jack for longwire/outdoor SW antenna.

For FM: Extend telescopic antenna fully; orient vertically.
For SW: Extend telescopic antenna; for better reception connect external wire.
For AM: Use built-in ferrite bar antenna; rotate radio for best reception.

Tip: Keep antenna away from power lines and metal objects for optimal reception.

Operating Modes

Supports AM, FM, and multiple SW bands.

Band selection: Rotate BAND switch to desired mode.
Tuning: Turn knob or enter frequency directly with number keys.
Fine tuning: Use TUNING MODE to adjust step size.
Volume control: Adjust VOLUME knob; use headphones for private listening.
Sleep timer: Press SLEEP repeatedly to set 15-90 minute auto-off.
Alarm: Set alarm time with ALARM SET; radio will power on at set time.

WARNING! Do not touch antenna during thunderstorms. Disconnect external antennas in stormy weather.

Memory Functions

Store up to 40 favorite stations.

Store: Tune to desired frequency, press MEMORY, press number key (1-40).
Recall: Press RECALL, press memory number.
Scan memories: Hold RECALL to scan through stored stations.
Clear memory: Store new frequency to same number (overwrites old).

Note: Memories are maintained by battery backup; replace batteries without delay to prevent memory loss.

Care & Cleaning

Unplug AC adapter and remove batteries before cleaning. Use soft, dry cloth only.

CAUTION! Never use liquids, solvents, or abrasives. Keep away from moisture and extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact Sony Customer Service at 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Batteries/AC adapter	Check battery polarity; ensure AC adapter is connected properly.
Poor reception	Antenna/placement	Extend antenna fully; move radio to different location; connect external antenna.
Memory lost	Battery failure	Replace batteries immediately; store stations again.
Display dim	Low batteries	Replace all batteries with fresh ones.
No sound	Volume/mute	Check volume setting; ensure headphones are not plugged in.
Clock incorrect	Power interruption	Reset clock after battery replacement or power outage.

Reset: Remove batteries and AC adapter for 5 minutes to reset microprocessor.

Service: 1-800-222-7669; www.sony.com/electronics/support