hifi engine

Manual Library / Kenwood

Kenwood KR-V7070

Audio Video Stereo Receiver (1995)

add a review add a review

Kenwood KR-V7070

Specifications

Tuning range: FM, MW

Power output: 100 watts per channel into 8Ω (stereo)

Surround output: 100W (front), 100W (center), 28W (rear)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.01%

Input sensitivity: 2.5mV (MM), 200mV (line)

Signal to noise ratio: 75dB (MM), 98dB (line)

Output: 2000V (Pre out)

Speaker load impedance: 4Ω (minimum)

Video Connections: composite

Dimensions: 440 x 144 x 347mm

Weight: 9.8kg

Accessories: remote control

Downloads

Comments

re: KR-V7070

Recently my Kenwood KR-V7070 would shut off intermittently and the standby light would blink. After some research it seemed as though it was speaker wire shorting. Obviously there was some other issue since it would do it with both A and B speakers off and the headphones in. I opened the unit up and looked for obvious signs of heat on circuit boards etc. Nothing noticed. I undid some wire wraps and decided to plug it back in and test with the cover off. Using a fluke ir thermometer looking for high heat, found nothing but it didn't shut down. Tested for a few days and it worked perfectly so I buttoned it back up and put the system all back together. Turned it on and it did the same thing after a few minutes. Well out it came again. Tore it back down but couldn't find a service manual until I stumbled across it here. With the help of the service manual I found here, It seems as though the issue was as follows. On my unit there is a small circuit board (X0 7 F/7) mounted atop the heat sink with 3 wires used as ties labeled J6, J7 and J8 and a capacitor labeled C14. I noted that there was no wiring going to that board. The ceramic capacitor has a trace on the bottom side that would short, in other words, intentionally the trace goes to nothing else but bridges both sides of the capacitor. One lead of the capacitor is orientated on the back side to contact the heat sink and the other does not. The capacitor is layed over parallel to the board and touching the mounting screw from the factory and then the wire looms go over the top of that and the wire ties soldered to the board lay over to hold the loom. On careful inspection after removing the board I noticed that the insulation on the cap was worn off and the side was discolored. I decided to fire the unit up without that part in place and monitor temps again. Everything was great. I put the board back in place but left the cap up. Still great!. Layed the cap opposite the screw and still great. Put the unit back together and still great!!!! Thank you so much for the service of the web site and to all that put up the info! Special thanks to Ivy Caudieus! Next task is to replace the belts on the Pioneer CT-F1250. Can't wait!

This website is not affiliated with or sponsored by Kenwood. To purchase KR-V7070 spares or accessories, please contact the company via their website or visit an authorised retailer.