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I purchased a copy of my old JVC VCR Service manual from Owner-Manuals.com
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Good quality, the manual help me to repair the echo/reverb section
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2.2 SPEAKER UNIT
For better audio quality, the receptacle terminals and terminal fittings of the speaker unit are soldered. When disassembling/reassembling the speaker unit, be sure to refer to the following figures.
Tools to be used � Hexagonal wrench (4 mm): GGK1024 � Soldering gun: GGK1069 � Lead-free solder: GYP1006 � The woofer is attached to the baffle board with 6 hexagon-socket screws from the outside. When disassembling, remove all these screws, pull out the woofer, then remove the solder to disconnect the cords. � The midrange and tweeter are integrated into a coaxial unit. This coaxial-unit speaker is attached to the baffle board with 6 hexagon-socket screws from the outside. When disassembling, remove all these screws, pull out the coaxial-unit speaker, then remove the solder to disconnect the cords.
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When working on the woofer
Provide a stand with a height of approx. 15 cm and a piece of soft cloth for protection. Place the woofer on the cloth. To work on the woofer, drape a piece of soft cloth around the edge of the hole where the woofer was attached, to protect the cabinet from being scratched.
When working on the coaxial-unit speaker
Provide a stand with a height of approx. 15 cm and a piece of soft cloth for protection. Place the coaxial-unit speaker on the cloth. To work on the coaxial unit, drape a piece of soft cloth around the edge of the hole where the coaxial-unit speaker was attached, to protect the cabinet from being scratched.
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Piece of soft cloth
When reattaching, after connecting the cords, solder the terminals for the woofer then place the woofer so that the terminal board comes to the lower side.
When reattaching, connect the cord with black tape to the tweeter and the cord with white tape to the midrange then solder the terminals. Place the coaxial unit so that the terminal board of the midrange comes to the lower side then turn it counterclockwise slightly to secure it.
: White with Black line
Upper side
Terminal size: Extra large : White with Black line
Upper side
Terminal board of the tweeter
Terminal size: Large Terminal size: Small
Black tape
E
: White
Woofer
White tape
Coaxial unit
: White Terminal size: Large Terminal board of the midrange Terminal size: Extra large
: White with Black line White tape
Terminal size: Large
: White
F
S-7EX
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