Marantz SR-4400 Sevice Bulletin
Date: 30-June-2003 Model: SR4300,SR4400
Page: 1 / 1 REF.NBR: MZ03-023
SERVICE BULLETIN
Circulation: Application:
Subject:
The sound is interrupted, when the playback
DIGITAL of CD-R/RW of the SCMS signal.
x for information customer
complaint in case of service
mandatory
...................
See Below
Int.ref:
[PHENOMENON]
When the playback CD-R/RW of Digital that SCMS(Serial Copy Management System) signal was recorded,
The sound is interrupted
[SOLUTION]
Replace MICRO PROCESSOR(Flash)
ICS18
on the
DIGITAL/AUDIO PCB
.
[NECESSARY PART]
1. SR4300
POS.NO
(H8/3026F Flash Ver.030527 wrote FACTORY PART No.
ICS18 Part no. *HS09AWH0R New version no: VER .030527
OICH83026F43SV0527
[OLD part no. *HU100620R FACTORY PART No. OICH83026F]
2. SR4400
POS.NO
(HD6433026D04F Mask Ver.030515 FACTORY PART No.
ICS18 Part no. *HS26AWH0R New version no: VER .030515
OICHD6433026D04F
[OLD part no. *HU100620R FACTORY PART No. OICH83026F]
Version no can be confirmed with SERVICE MODE, Refer to service manual of SR4300 page56 or
SR4400 page52.
)
)
[REMARKS]
The countermeasure apply to this claim only.
This improvement has been done in the production
the serial no.XE000323xxxxxx and after (SR4300)
the serial no.XE000322xxxxxx and after (SR4400/N1B/N1S)
SR4400/A1B/A1S/K1S/K1G/U1B have used New MICRO PROCESSOR.
Therefore, this problem doesn't occur.
Approved by S.NAGAO Written by
WQ-19 2 817
/additional rule 3 (1st Issue 2003-03-19)
Date: 31-Oct.-2003 Model: SR4300/SR4400
Page: 1 / 3 REF.NBR: MZ03-047
SERVICE BULLETIN
Circulation: Application:
Subject:
The problem of the Speaker protection circuit.
x for information customer
Service code XE00
complaint in case of service
mandatory
...................
XE00xxxxxxxxxx
Int.ref:
[PHENOMENON]
1) The protection circuit does not work when the power transistor was damaged.
2) When the power transistor was damaged, about 40 V outputs to speaker out.
3) The protection circuit function does not operate, then the unit will not be in POWER STANDBY mode
and the speaker output RELAY does not work.
[REASON]
1) When the transistor is damaged before turn on the unit, the micro processor can not detect protection
signal (Protect2).
2) Turn on the unit, the down edge of a protection signal (Protect2) is undetectable for about 2 seconds
after the micro processor reset
[SOLUTION]
The protection output signal of Protection IC is added to the "SPK MUTE" signal in hard, and
Speaker MUTE is always set to “ON” when abnormal occur protection
1.SR4300
DIGITAL/AUDIO PCB
1) Chip Resistor
LS850
(100 ohm 1/16W part no. NN05101610 ) is changed to
Silicon Diode
(Part no. *HD201810R--- 1SS400 POHM: EMD2, EIAJ: SC-79, JEDEC: SOD-523 ).
MAIN PCB
2) Chip Resistor
DN601(Part no.HD20002000---Silicon Diode 1SS254 ROHM)
is added between
BASE of QN606 SEMICOM.COMP and No.5 pin of JFN101 Connector
2.SR4400
DIGITAL/AUDIO PCB
1) Chip Resistor
RS928
(100 ohm 1/16W part no. NN05101610 ) is changed to
Silicon Diode
(Part no. *HD201810R--- 1SS400 POHM: EMD2, EIAJ: SC-79, JEDEC: SOD-523 ).
MAIN PCB
2) Chip Resistor
DN601(Part no.HD20002000---Silicon Diode 1SS254 ROHM)
is added between
BASE of QN606 SEMICOM.COMP and No.5 pin of JFN101 Connector
As for the details, Please see page2/3 and 3/3
[REMARKS]
The countermeasure apply to this claim only.
This problem apply to the Service code number XE00xxxxxxxxxx.
This improvement has been done in the production the Service code number XE01xxxxxxxxx and after.
Approved by S.NAGAO Written by
WQ-19 2 817
/additional rule 3 (1st Issue 2003-03-19)
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