To Next PageTo Next PageWhat to do if PROTECT is displayed on Sony HCD-S20?
If 'PROTECT' is displayed on the VFD of your Sony Car Receiver, try the following: First, check if the voltage at pin 1 of CON2 on the POWER board is +12V. If the issue persists, try exchanging the POWER board. As a final step, exchange the MAIN board.
What to do if the wire is not inserted to XP4 on the MAIN board of Sony Car Receiver?
If the wire is not inserted to XP4 on the MAIN board of your Sony Car Receiver, insert the wire.
What to do if OVER CURRENT is displayed on Sony Car Receiver?
If 'OVER CURRENT' is displayed on the VFD of your Sony Car Receiver, try these steps: First, disconnect the USB board to see if the display persists. If it does, try exchanging the USB board. If the problem continues, exchange the MAIN board.
How to unlock Sony HCD-S20 when LOCKED is displayed?
If 'LOCKED' is displayed on the VFD of your Sony Car Receiver when the [OPEN/CLOSE] button is pressed, hold down the [STOP] button on the remote commander and the [OPEN/CLOSE] button on the main unit for 5 seconds. Check if “UNLOCKED” is displayed on the VFD. If the issue persists, exchange the POWER board.
What to do if FM reception and AUDIO IN function is not OK in Sony Car Receiver?
If the FM reception and AUDIO IN function are not working correctly on your Sony Car Receiver, insert the wire to XP6.
What if the wire is not inserted to XP3 or the FFC is not inserted to XP2 on the MAIN board of Sony Car Receiver?
If the wire is not inserted to XP3 or the FFC is not inserted to XP2 on the MAIN board of your Sony Car Receiver, insert the wire and the FFC.
General| Category | Car Receiver |
|---|---|
| Brand | Sony |
| Model | HCD-S20 |
| Type | CD Receiver |
| CD Player | Yes |
| Radio Tuner | AM/FM |
| MP3 Playback | Yes |
| Remote Control | Yes |
| Display | LCD |
| Output Power | 45W x 4 channels |
Details on Amplifier, CD, Tuner, and USB sections.
Lists supported audio codecs and bit rates for MP3 and WMA.
Covers power requirements, consumption, dimensions, and mass of the unit.
Guidelines for handling optical pick-up, laser diodes, and unleaded solder.
Notes on board repair, part replacement, and required test discs.
Steps to remove the top cover and rear panel assembly.
Procedures for disassembling the front panel and loader mechanism.
Steps for removing VFD, USB, Main, and Power boards.
Procedure to verify the MCU and MPEG IC software versions.
How to lock the disc tray and test the VFD display functionality.
Steps to clear all preset data and return the unit to initial conditions.
Procedure for checking the CD player's RF signal using an oscilloscope.
Step-by-step troubleshooting for basic operation issues.
Diagnosing issues based on VFD error messages like OVER CURRENT or PROTECT.
Overall system architecture illustrating component interactions.
Component layout and connections for Main, Key, USB, and VFD boards.
Detailed circuit diagrams and printed wiring board layouts for the main board.
Diagrams for USB, VFD, Key, and Power boards, including PWBs.
Breakdown of the top cover assembly and related parts.
Detailed parts breakdown of the main chassis and internal components.
Exploded view of the front panel assembly, including controls and display.
