No Sound. Noise Generated - Marantz M-CR612 Service Manual

TROUBLE SHOOTING
1. This unit does not start, not LED lighting.
Check Power Supply Voltages for SMPS.
• CN221 : 11pin +3.3V (PP) Pulse signal of 50 Hz or
60 Hz
• CN221 : 9pin +5V
• CN221 : 11pin +20V
OK
Check Power Supply Voltages.
MAIN PCB
• +STBY_+5V CP102 : 9pin
OK
Check the MCU[IC111].
• IC112 : 19pin RESET (3.3V)
• IC112 : 20pin 12MHz
OK
Check Power Supply Voltages for OLED.
MAIN PCB
• FPC101 : 22pin, 24pin +16V_OLED
• FPC101 : 26pin +3.3V_OLED
OK
Check control signal for OLED.
DISPLAY PCB
• FPC1 : D0 to D7, EL_RD, EL_RW, EL_DC, EL_CS,
L_RST
OK
END
NG
Replace the SMPS.
NG
Replace defective parts of MAIN PCB
NG
Replace defective parts of around [IC111].
NG
Replace defective parts.
NG
Replace defective parts.
Replace the OLED

2. No Sound. Noise generated

2.1. COMMON
Check Digital Audio Data of DIR[IC117].
• IC117 PCM9211: 17, 18, 19, 20 pin DIR1M_
SDATAO, DIR1M_LRCKO, DIR1M_SCLKO,
DIR1M_MLCKO
OK
PWM CONTROLLER[IC104]
Check Digital Audio Data Input.
• IC104(TAS5558) : 11, 22, 23, 24, 26 pin
MCLK, LRCK, SCLK, SDIN1, SDIN2_1
OK
Check the PWM output of the PWM CONTROL-
LER [IC104].
• PF103 : 2, 4pin (Lch, SPK-B)
6, 8pin (Lch, SPK-A)
10, 12pin (Rch, SPK-B)
14, 16pin (Rch, SPK-A)
OK
Check the PWM output of DAMP[TAS5142].
• L502 (Rch , SPK - B) L503 (Rch , SPK - B)
• L504 (Rch , SPK - A) L505 (Rch , SPK - A)
• L510 (Lch , SPK - B) L511 (Lch , SPK - B)
• L512 (Lch , SPK - A) L513 (Lch , SPK - A)
OK
END
48
NG
Replace defective parts of around [IC117].
NG
Replace defective parts of around [IC104].
NG
Replace defective parts of around [IC104].
Replace defective parts of around [IC500, IC502].
NG
Replace defective parts of around [IC500, IC502].