Check the PWM waveform output of PWM Modulator by Oscilloscope.
AMP PCB
[IC9006] : 5pin (Lch)
[IC9005] : 5pin (Lch)
[IC9011] : 5pin (Rch)
[IC9011] : 5pin (Rch)
Check the square waveform of the terminals. If an approximate
5V
P-P
square wave can be confirmed at each terminal, there are no
problems with DIR (PCM9211) and the PWM Modulator (CSRA6601).
No faults
Identify the input function from which sound is not output or from
which noise occurs, and check the troubleshooting sections from
2.3
onwards.
2.1.A
PWM waveform (square wave) is not output. Fault in the
DIR (PCM9211) or PWM Modulator (CSRA6601).
Check
“2.2. COMMON (Power, Contorl signal line)”
,
and check the soldering or replace each devicce if there
are no faults.
[IC204] on MAIN PCB.
[IC903] on AMP PCB.
2.1.B
PWM waveform (square wave) is disrupted.
Fault in output stage circuti.
Check the soldering. If the fault still occurs check
"2.1.A".
.
NG
NG
OK
2. No Sound, Noise generated
2.1. COMMON(signal)
Check Digital Audio Data output from DIR.
MAIN PCB
[IC204] : 17, 18, 19, 20pin
DIR_LRCK, DIR_BCK, DIR_DATA, DIR_MCK
OK
Check the soldering or replace each device.
[IC204] : 17, 18, 19, 20pin on MAIN PCB.
NG
Check Digital Audio Data input for PWM Modulator.
AMP PCB
[IC903] : 80, 82, 81pin
WS, SCK, SD
OK
Check the soldering or replace each device.
[IC903] : 80, 82, 81pin on AMP PCB.
NG
35
Содержание PMA-50
Страница 8: ...Personal notes 8...
Страница 28: ...4 Enter the user name company name and Click Next 5 Click Next 6 Click Finish 28...
Страница 41: ...fig 7 DIR SYS ucom communication waveform W0IC214 140pin DIR_CE W1R362 DIR_CL W2R364 DIR_DI W3R363 DIR_DO 41...
Страница 42: ...Personal notes 42...
Страница 71: ...PCM9211 IC204 PCM9211 Block Diagram 71...
Страница 72: ...PCM9211 Pin Discriptions 72...
Страница 80: ...BT_Module MDX 5XR IC501 Pin Map Top View Block Diagram 80...