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Date: |
28-Dec-2004 |
Model: SR7400/SR7500/SR8500 |
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SERVICE |
BULLETIN |
Page: |
1 / 1 |
REF.NBR: MZ04-085 |
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Subject: |
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Level |
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Application: |
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FL Display does not light up. |
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See below |
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Int.ref: |
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[PHENOMENON] |
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1.In condition, AC input is about 10% overvoltage than Rated voltage and the sound is not outputted for a long time.
2.The DIODE (POS NO.D616) may short-circuit. R648 and R649 are broken by this short-circuit.
[SOLUTION]
1. POS.NO R649 RESISTOR (1.5K OHM) is changed to RESISTOR( 2.2K OHM) on the POWER PCB
1.5 K ohm |
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2.2 K ohm |
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[NECESSARY PART]
POS.NO. R649 nsp (RESISTOR 2.2K OHM 1WJ ) Factory code number KRG1SANJ222RT
[REMARKS]
1.The production of SR7400 / SR8400 has been finished.
2.SR7500/N1S: This improvement has been done in the production serial number MZ010450001274 and after.
3.SR7500/U1B: This improvement has been done in the production serial number MZ010450003001 and after.
4.SR8500/N1S: This improvement has been done in the production serial number MZ010450000430 and after.
5.SR8500/N1B: This improvement has been done in the production serial number MZ010450000001 and after.
6.SR8500/U1B: This improvement has been done in the production serial number MZ010449000796 and after.
SR7400 / SR7500 / SR8500 Service Bulletin REF.NBR: MZ04-085 page 2/3
Approved by N.Sensui Written by S.NAGAO
WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19)
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