3-19
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the PORT. IN FUNCTION, repair the set according to the
following guide.
6-4. IN THE PORT. IN FUNCTION
6-4-1. Solution
Please check and replace IC202 on MAIN board.
6-4-2. How to troubleshoot (Countermeasure)
1) Check PT_L/R signal from JOG board to MAIN board.
2) Check if PT_LR is entered Pin4 & 5 of CN3J01 Pin4 & 5 of CN3V02 Pin21 & 20 of CN3V01.
3) Check POT_L/R signals to IC202(Pin21, 22).
4) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.
5) Check if ADC_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.
6) Check the following I2S 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.
7) 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.
6-4-3. Service hint (Any picture / Remark)
w{sGGYX
w{yGGYY
pjYWY
hkjkh{hGGGyYX\
hkjijrGGyYX]
khjsyjsrGGyYX`
khjtjsrGGyYYX
{T
IC501
MLC3700
IC600
PS9854
PWM
DAC_BCK
DAC_LRCK
IC202
CS5346
POT. IN
ADC_DATA
DAC_MCLK
POT_L/R
VOLUME
Board
IR AMP
IRF6775
< Signal check point >
< PORT. IN function signal
fl
ow >
Содержание CM9730
Страница 11: ...MEMO 1 10 ...
Страница 13: ...MEMO 2 2 ...
Страница 59: ...MEMO 3 42 ...
Страница 83: ...3 89 3 90 2 MAIN P C BOARD TOP VIEW ...
Страница 84: ...3 91 3 92 MAIN P C BOARD BOTTOM VIEW ...
Страница 85: ...3 93 3 94 3 VFD P C BOARD ...
Страница 86: ...3 95 3 96 4 MAIN VOLUME P C BOARD 5 MIC P C BOARD ...
Страница 87: ...3 97 3 98 6 JOG P C BOARD 7 USB P C BOARD 8 TUNER P C BOARD ...
Страница 88: ...3 99 3 100 9 SPEAKER LED_MAIN P C BOARD TOP VIEW 10 SPEAKER LED P C BOARD TOP VIEW BOTTOM VIEW BOTTOM VIEW ...
Страница 89: ...3 101 3 102 MEMO MEMO ...