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Symptom
:
Popping Noise
Cause
:
Counter- :
Modification of SW DAMP PCB by following parts(Kit parts number: RFKZHTB580KT)
measure
1. Add GND wire between Digital Receiver Module and DAMP PCB (P/N: REE1749 Qty: 1pc)
2. Add 1000pF/50V chip capacitors on DAMP PCB (P/N: F1H1H102B052 Qty: 1pc)
3. Add 10pF/50V chip capacitors on DAMP PCB (P/N: F1H1H100B052 Qty: 4pcs)
4. Change resistors on DAMP PCB from 0 ohm to 100 ohm (P/N: D0GB101JA065 Qty: 4pcs)
2. Add 1000pF/50V chip capacitors on DAMP PCB (P/N: F1H1H102B052 Qty: 1pc)
3. Add 10pF/50V chip capacitors on DAMP PCB (P/N: F1H1H100B052 Qty: 4pcs)
4. Change resistors on DAMP PCB from 0 ohm to 100 ohm (P/N: D0GB101JA065 Qty: 4pcs)
New PCB introduced this countermeasure has been applied from March, 2016 production and serial number is as follows.
Audio
Quick Service Manual
Model :
SC-HTB580/HTB680/HTB485
Frequency level
Noise of SMPS circuit goes into audio data lines of DAC IC.
Effective from (product serial number)
**6C*******
High Low A few One
Ref. No. : NWBG151102HTB580a
Date : Nov, 2015
Cases reported (country)
Germany/UK
ADD GND WIRE (REE1749)
Digital Receiver Module
DAMP PCB
Add 1000pF on C5617
SW DAMP PCB
Change R5776/5777/5778/5779 from
0ohm to 100ohm (D0GB101JA065)
IC5201
CN
1000
SW DAMP PCB
IC5201
CN
1000
CN1000
Pin24 - Pin22
CN1000
Pin24 - Pin23
IC5201 Pin14 - GND
SW DAMP PCB
W1(short jumper) - GND
ADD CHIP CAP 10pF/50V
(F1H1H100B052)
Be Carefully to shave off
the PCB surface for soldering
W1
N0: NWBG151102HTB580_1
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