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VERY GOOD SERVICE.FAST ANS VERY HONEST PRICE .RHAANK HERNAN
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Thanks to this service manual I repaired my old camcorder! The manual perfectly explains how to disassemble the camcorder step by step.
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This manual is very useful because it presents the technical specifications of the cd player, including the manufacturer of the reader, this helps if you need to replace it. It also displays the settings and layout of the circuit.
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Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
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Great quality copy, right what I was looking for, all I need to fix my radio.
Thanks
[PWD signal] After plug the AC cord into outlet, VP voltage appears on the base terminal of transistor Q3. When the VP exceeds 16 volts, Q3 is turned on by the differential voltage between base and emitter terminal of transistor Q3. Then the PWD signal goes to GND level and informes � Power ON � to the CPU. When the VP drops less than 16 volts, Q3 is turned off. Then the PWD goes high level since the PWD is pulled up to VDD. When the CPU receives � High � signal of PWD, CPU goes to � Power failure process �. Note : During plug the Ac cord into outlet, all voltages are supplied to the PCB. If you open the machine for repair, make sure plug off. [Location for voltage check points] Actual value on the E259-1 PCB (unitV)
Check point Power ON Power cord off
1 23.8(AC) 0
2 31.4 0
3 25.2 0
4 7.61 0
5 24 0
6 8.2 0
7 8.1 0
8 0.6 0
9 0 4
10 5 0
11 5.6 0
12 5 0
1
10
4 6 2 3 5 11
8 9
7
12
10
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