Question about Sony SLV-R1000 S-VHS VCR
I have replaced both of the IC protectors -ICP - N20 & N25 they were blown due to a short and I'm still having problems . I can't find the cause why it will not load the tape . It is getting the voltages required to the system .I appreciate if you could tell me what I have to do in order to get the unit fixed . Al
CHeck the timer switch. It looks like a round, flat plastic wheel with 4-5 small tabs (Contacts) sticking out. Sometimes they get dirty and won't respond to inputs.
Posted on Sep 28, 2008
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Posted on Jan 02, 2017
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I had exactly the same problem with my Denon DCD-910. Fixing it is easy, but it took me a while to find out;
In the power supply +10V and -10V unstabilized lines (in front of the 7805 and 7905 +5V and -5V regulators on the heatsink),
there are 2 ICP-N15 devices (IC protectors: very fast acting electronic fuses 0.6A). PCB component print is IC502 and IC503 if I remenber well. They tend to deteriorate over time and break, or a current peak could have made them tripping.
The +10V/-10V (+13/-13V really) is used for driving the loading/spindle/sliding motors and focus/tracking coils ONLY. +/-5V was still OK, that's why you can still see the display.
They have a TO92 transistor housing, but only 2 leads. ICP-N15 are hard to find; You could also use ICP-F15, but these have a different housing.
You could order the original ICP-N15 at utsource.net
An alternative could be to mount 2 polyswitches (also called multifuse), a PTC type current limiting and recoverable circuit breaker, like Bourns MF-R065, rated 0.65 A
I replaced them with 2 radial 800mA PCB solder mount fuses (1$/pc), and everything works fine again. Yet another piece of excellent equipment not to be thrown away ;-)
You have to unmount the PCB from the CD player housing (about 8 screws and disconnect all 10 connectors) to be able to replace the fuses.
While it is disassembled, check for broken solderings, especially on high power devices ( like voltage regulators mounted on heatsink or power transistors)
I hope it works for you too.
Jul 05, 2008 | Denon Audio Players & Recorders
Apr 05, 2007 | JVC HR-S9400 S-VHS VCR
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