3-19
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the TUNER FUNCTION, repair the set according to the
following guide.
6-5. IN THE TUNER FUNCTION
6-5-1. Solution
Please check and replace IC202, TU101 on MAIN board.
6-5-2. How to troubleshoot (Countermeasure)
1) Check if TUNER_LR is entered from Pin1 & 3 of TU101 to IC202(Pin23, 24).
If no signals, Check +3.3 V for Tuner power.
Check if the Tuner control signals (CLK, DAT, CE, RST, GPO2) are entered from IC101 to TU101.
If it doesn’t work, replace TUNER with a new one.
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC202.
3) Check if ADC/MIC_DATA is entered from IC202 to IC501.
If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.
4) Check the following I2S audio signal flow from IC501 to IC600. (Refer to Item 6-1.)
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.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide.
If AMP is damaged, replace it with a new one.
6-5-3. Service hint (Any picture / Remark)
0&6B0&/.WR5
0&6B/5&.WR5
0&6B%&.WR5
$'&0,&B'$7$WR
5
781(5B5WR&
781(5B5WR&
{T
IC501
MLC3700
IC600
TAS5548
PWM
DAC_BCK
DAC_LRCK
IC202
CS5346
TUNER
ADC_DATA
DAC_MCLK
TUNER_L/R
IR AMP
IRF6775
< Signal check point >
< TUNER function signal
fl
ow >
Summary of Contents for CM9530
Page 11: ...MEMO 1 10 ...
Page 13: ...MEMO 2 2 ...
Page 17: ...A60 A61A 651 652 653 653 4 SPEAKER SECTION 4 1 FRONT SPEAKER NS9530F ...
Page 18: ...A91A 951 952 953 953 A90L 4 2 SUBWOOFER SPEAKER NS9530W LEFT SUBWOOFER ...
Page 19: ...2 10 A91A 951 952 953 953 A90R SUBWOOFER SPEAKER NS9530W RIGHT SUBWOOFER ...
Page 78: ...3 79 3 80 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...
Page 80: ...3 83 3 84 2 MAIN P C BOARD TOP VIEW ...
Page 81: ...3 85 3 86 MAIN P C BOARD BOTTOM VIEW ...
Page 82: ...3 87 3 88 3 VOLUME P C BOARD TOP VIEW ...
Page 83: ...3 89 3 90 VOLUME P C BOARD BOTTOM VIEW ...
Page 84: ...3 91 3 92 4 VFD P C BOARD TOP VIEW BOTTOM VIEW ...
Page 85: ...3 93 3 94 5 MIC P C BOARD TOP VIEW BOTTOM VIEW 6 PORTABLE P C BOARD TOP VIEW BOTTOM VIEW ...