LG RCS606F Service Manual

3-21
ONE POINT REPAIR GUIDE
5. NO SOUND
There is no sound output in the CD FUNCTION, repair the set according to the follow-
ing guide.
5-1. IN THE CD FUNCTION
5-1-1. Solution
Please check and replace IC501, IC602, IC801 on MAIN board.
5-1-2. How to troubleshoot (Countermeasure)
1) Check CD_BCK, CD_LRCK, & CD_DATA signals from IC407 to IC501.
 If no signal, check if the RF & servo signals from MD is entered to IC407.
Refer to the “No operation of MD” guide on Item 4.
2) Check the following I2S signal flow. < I2S audio signal Interface >
- DAC_BCK: IC501_87Pin --> IC507_16Pin --> IC602_4Pin
- DAC_LRCK : IC501_88Pin --> IC507_5Pin --> IC602_4Pin (44.1 kHz)
- DAC_DATA : IC501_83Pin --> R817 next to IC01 --> IC602_6/9Pin
- DAC_MCLK : IC501_86Pin --> R818 next to IC801
 If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to
the IC is distorted or no signal, replace it with a new one.
3) Check if “Digital audio AMP block” on Item 5-2 is normal.
5-1-3. Service hint (Any picture / Remark)
khjtjsrGOX]U`Zto¡P
khjijrGOXU[to¡P
khjkh{h
khjsyjrGO[[UXro¡P
{T
IC501
MLC9800
IC602
PS9850
PWM
IC801
FS502B
BEAT BOX
AMP IC
TAS5631
DAC_BCK
DAC_LRCK
IC407
BU9543KV
BEAT_DATA DAC_MCLK
< Waveform of I2S audio interface signals >
< I2S Signal Flow >

LG RCS606F Specifications

General

Brand	LG
Model	RCS606F
Category	Stereo System
Language	English