Parts/Service for HT-RT3

Parts/Service for HT-RT3

Brand: SONY

Category: Audio

Document Type: Parts/Service

Language: EN

Uploaded: Nov. 21, 2025, 8:10 p.m.

Manual Publish Date: 2017-09-01

Warranty Information

Refer to the relevant documentation for specific warranty details.

COLD RESET: Clears certain data without initializing personal information. Execute when returning the unit to the customer.

PANEL TEST: Lights up all segments in the screen display panel, then shows model information. Pressing buttons cycles through various displays.

SOFTWARE VERSION CHECK: Displays the current software version.

AMP TEST: Allows for testing amplifier functions. Press buttons in a specific order to access different modes.

DEMO MODE: For shop front display, shows a pre-programmed demonstration.

USB UPDATE TEST MODE: Allows for microcontroller software updates via USB.

Troubleshooting and error codes

Problem Troubleshooting Steps
"PRTCT" is displayed on OLED display after turning the power on
  1. Remove USB device. Confirm if "PRTCT" is displayed after removing Bar speaker (FRONT L, FRONT R, CENTER speakers) and Surround speaker (SUR L, SUR R speakers) and turning the power ON.
    • If yes: Check and replace the loudspeaker in subwoofer.
    • If no: Confirm if "PRTCT" is displayed after plugging Bar speaker (FRONT L, FRONT R, CENTER speakers) and turning the power ON.
      • If yes: Check and replace the loudspeaker in Bar speaker.
      • If no: Confirm if "PRTCT" is displayed after plugging Surround speaker (SUR L, SUR R speakers) and turning the power ON.
        • If yes: Check and replace the loudspeaker in Surround speaker.
        • If no: Replace MAIN board IC1000 and IC1002 and check "PRTCT" is displayed.
          • If still displayed: Replace complete MAIN board.
The video of HDMI is not displayed during USB mode
  1. Check MAIN board IC3200 pin 4 is 5V.
    • If yes: Check MAIN board IC3200 pin 1 is 3.3V.
      • If yes: Check MAIN board IC3200 pin 5 is 7.4V ~ 8V.
        • If yes: Replace IC3200 on MAIN board.
        • If no: Replace complete MAIN board.
      • If no: Replace complete MAIN board.
    • If no: Check MAIN board IC3200 pin 1 is 3.3V.
      • If yes: Check MAIN board IC3200 pin 5 is 7.4V ~ 8V.
        • If yes: Replace IC3200 on MAIN board.
        • If no: Replace complete MAIN board.
      • If no: Refer to "Power is not turned on" on page 17.
The sound is not outputted
  1. Check the Subwoofer, Bar speaker (FRONT L, FRONT R, CENTER speakers) and Surround speaker (SUR L, SUR R speakers) are functionable.
    • If yes: Check that the signal is inputted to MAIN board IC1001: pin 24 (FRONT L, FRONT R speakers), pin 25 (SUR L, SUR R speakers), pin 27 (CENTER speaker, Subwoofer).
      • If yes: Check that the signal is outputted from MAIN board IC1001: pin 38, 39 (CENTER speaker), pin 41 (FRONT L speaker), pin 43 (FRONT R speaker), pin 45 (SUR R speaker), pin 47 (SUR L speaker), pin 48, 49 (Subwoofer).
        • If yes: Check that the signal is outputted from MAIN board IC1000: pin 27, 28, 32 (CENTER speaker), pin 35 (FRONT L speaker), pin 39, 40 (FRONT R speaker).
          • If yes: Check that the signal is outputted from MAIN board IC1002: pin 27, 28, 32 (Subwoofer), pin 35 (SUR R speaker), pin 39, 40 (SUR L speaker).
            • If yes: Replace complete MAIN board.
            • If no: Replace MAIN board IC1002.
          • If no: Replace MAIN board IC1000.
        • If no: Replace MAIN board IC1001.
      • If no: Replace the speaker which is not functionable.
Power is not turned on
  1. Power is not turned on.
    • If yes: Check the voltage of the following is 20V/32V SWITCHING REGULATOR: Connector (CN101) pin 2 to 4 and 8.
      • If yes: Check MAIN board IC3205 pin 1 is 12V.
        • If yes: Check MAIN board connector (CN2006) pin 14 is 12V.
          • If yes: Replace complete MAIN board.
          • If no: Replace transistor (Q3208) on MAIN board.
        • If no: Replace IC3201 on MAIN board.
      • If no: Replace the SWITCHING REGULATOR.
USB cannot be detected
  1. USB cannot be detected.
    • If yes: Check IC3000 pin 1 is 5.1V.
      • If yes: Check coil (L3000) pin 1 and pin 3 are shorted to ground.
        • If yes: Replace complete MAIN board.
        • If no: Replace connector (CN7000) on USB board.
      • If no: Check IC3000 pin 4 is 3.3V.
        • If yes: Refer to "Power is not turned on" on page 17.
        • If no: Check IC3000 pin 5 is 5.1V.
          • If yes: Replace IC3000 on MAIN board.
          • If no: Replace complete MAIN board.
    • If no: Check IC3000 pin 4 is 3.3V.
      • If yes: Refer to "Power is not turned on" on page 17.
      • If no: Check IC3000 pin 5 is 5.1V.
        • If yes: Replace IC3000 on MAIN board.
        • If no: Replace complete MAIN board.
Display panel is not functioned
  1. No Display.
    • If yes: Check voltage of C5008 on OLED CHUKEI PC BOAR board is around 12V.
      • If yes: Check resistance of C5008 on OLED CHUKEI PC BOAR board is > MΩ.
        • If yes: Turn the power ON and confirm the Display function.
        • If no: Replace C5008 on OLED CHUKEI PC BOAR board. Replace Q3208 and L3207 on MAIN board.
      • If no: Turn OFF the set and disconnect the WIRE (FLAT TYPE) from OLED CHUKEI PC BOAR board.
        • If yes: Replace complete MAIN board.
        • If no: Replace C5008 on OLED CHUKEI PC BOAR board. Replace Q3208 and L3207 on MAIN board.
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