LG RCT689H - Service Manual

Questions and Answers

A
Amanda CruzAug 17, 2025
What to do if the LG RCT689H DVD Player remote control does not work properly?
- H
  hillscottAug 17, 2025
  The remote control may not work properly for several reasons: * Ensure the remote control is pointed at the remote sensor on the unit. * Make sure the remote control is not too far from the unit. * Check for any obstacles between the remote control and the unit. * Replace the batteries in the remote control if they are exhausted. * If you recently replaced the batteries, the remote’s manufacturer code may have returned to the default setting; in this case, reset the code (page 65).
Y
yjenkinsAug 19, 2025
What to do if the connected HDMI device does not display any picture with my LG DVD Player?
- J
  johnsmithAug 20, 2025
  If the connected HDMI device does not display any picture, try the following: * Disconnect and then reconnect the HDMI cable. * Switch the power of the HDMI device off and then back on. * Ensure the video input of the connected device is set correctly for this unit. * Verify that the HDMI cable you are using is fully HDMI-compliant. * Note that not all HDCP-compatible DVI devices will work with this unit.
K
Kristen CummingsAug 22, 2025
What to do if the connected HDMI device does not output sound with my LG RCT689H?
- A
  Ashley JohnsonAug 22, 2025
  The connected HDMI device may not output sound because: * Some HDMI-compatible devices do not output sounds (check the manual that came with the connected device). * If your TV is not capable of handling 96 kHz sampling frequency, set the [Sampling Freq.] option to [48 kHz] on the setup menu. * If your TV is not equipped with Dolby Digital and MPEG decoder, set the [Dolby Digital] and [MPEG] options to [PCM] on the setup menu. * If your TV is not equipped with DTS decoder, set the [DTS] options to [OFF] on the setup menu.
J
jonesgaryAug 25, 2025
Why the LG RCT689H stereo audio record and playback is not present?
- A
  amberespinozaAug 26, 2025
  Stereo audio record and playback might not be present if: * Your TV is not Stereo-compatible. * The broadcast programme is not in stereo format. * The A/V Output jacks on the unit are not connected to TV A/V In jacks.
D
Douglas AndradeAug 28, 2025
What to do if my LG RCT689H DVD Player does not start playback?
- M
  mcguiredanielleAug 28, 2025
  If your unit does not start playback, consider the following: * Ensure that you have inserted a playable disc, verifying the disc type, color system, and regional code. * Place the disc with the playback side down. * Make sure the disc is placed correctly on the disc tray inside the guide. * Try cleaning the disc. * Cancel the Rating function or change the rating level.
R
Robert KingAug 30, 2025
Why does my LG RCT689H timer record not record successfully?
- Q
  qbrooksAug 30, 2025
  Timer recording may fail if: * The clock is not set to the correct time. * The start time of the timer recording is in the past. * Two timer recordings overlap (only the earlier one will record completely). * The recorder’s built-in tuner is not set when setting the recording programme (ensure it's not the TV’s built-in tuner). * The inserted disc is damaged.
F
fletchernathanSep 2, 2025
Why does my LG DVD Player cannot record or does not record successfully?
- B
  Brandy DiazSep 2, 2025
  Recording issues may occur due to: * Insufficient space on the disc. * Copy-protected source material. * Incorrect disc format for copy-once material (use a VR mode formatted disc). * Power failure during recording. * In DVD mode, attempting to record rated digital programs, no signal, audio only, or scrambled programs. * DTV rating settings that block higher-rated digital programs (change the DTV rating level to record).
D
Douglas JohnsonSep 5, 2025
Why I cannot play movie, photo or audio files on my LG DVD Player?
- C
  Candice PittsSep 5, 2025
  You may not be able to play certain files if: * The files are not recorded in a format that the unit can play. * The unit does not support the codec of the movie file.
P
patrick51Sep 7, 2025
Why even though the timer is set, the LG RCT689H DVD Player will not record when?
- C
  Caroline NolanSep 7, 2025
  The recorder may fail to record even with the timer set if: * There is no disc loaded. * A non-recordable disc is loaded. * Disc Protect is set to [ON] in the Disc menu (see page 33). * There are already 99 titles (DVD-RW, DVD-R), 49 titles (DVD+RW, DVD+R(DL)) recorded on the disc.
T
Tasha RothSep 10, 2025
Why I cannot enter a timer programme when using my LG RCT689H DVD Player?
- R
  Rebecca SteinSep 12, 2025
  You may not be able to enter a timer program if: * A recording is already underway. * The time you’re trying to set has already passed. * There are already 16 timer programs set.

Summary

SECTION 1 SUMMARY

Product Safety Servicing Guidelines

Guidelines for safe servicing of VCR+DVD recorder products.

Servicing Precautions

Important safety and procedural precautions for service technicians.

EEPROM IC Setting Information

Procedures for setting EEPROM IC options and initializing the system.

Software Upgrade Procedures

Instructions for upgrading main and loader programs, and I/O µ-COM software.

Device Specifications

Technical specifications for the VCR+DVD recorder, covering general, recording, playback, inputs, and outputs.

SECTION 2 CABINET & MAIN CHASSIS

Exploded Views Overview

Visual breakdown of the unit's main sections and components.

Cabinet and Main Frame Section

Detailed illustration of the unit's external and internal frame structure.

Deck Mechanism Sections

Illustrations of the VCR deck mechanisms, RV9 and D37(N) types.

Packing Accessory Section

Identification and illustration of included packing accessories.

SECTION 3 ELECTRICAL

Overall Wiring Diagram

Comprehensive diagram showing electrical connections between major components.

VCR Part Electrical Troubleshooting and Diagrams

Covers VCR adjustments, troubleshooting, diagrams, and PCBs.

VDR Part Electrical Troubleshooting and Diagrams

Covers VDR troubleshooting, diagrams, waveforms, and component lists.

Component Lists and Voltage Charts

Voltage charts for ICs, and lists of capacitors and transistors.

SECTION 4 MECHANISM OF VCR PART(D-37)

Deck Mechanism Parts Locations

Identification and location of various VCR deck mechanism parts.

Deck Mechanism Disassembly and Assembly

Step-by-step procedures for disassembling and assembling VCR deck components.

Deck Mechanism Adjustment Procedures

Instructions for adjusting key mechanical functions like torque, roller height, and head alignment.

Deck Mechanism Troubleshooting Guide

Guides for diagnosing and resolving issues with deck operation and tape loading.

SECTION 5 RV9 LOADER PART

Loader Electrical and Mechanism Troubleshooting

Guides for electrical issues, mechanism problems, and disc recognition.

DVD Disc Information and Specifications

Details on DVD disc types, recording layers, specifications, and zone organization.

Pick-up System Analysis

Internal structure, block diagram, pin assignments, and signal detection for the optical pick-up.

Major ICs: Block Diagrams and Pinouts

Detailed block diagrams and pin descriptions for key ICs in the loader.

LG RCT689H Specifications

General

Progressive scan output	Yes
Analog signal format system	PAL, SECAM
Playback formats	DivX, MPEG4 AVC (H.264)
Dimensions (WxDxH)	430 x 260 x 78.5 mm
Number of TV tuners	1
Audio formats supported	MP3, WMA
Image formats supported	JPG
Audio decoders	Dolby Digital
Device type	DVD recorder
Product color	Black
Disc types supported	CD, CD-R, CD-RW, DVD, DVD+R, DVD+RW, DVD-R, DVD-RW
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.