JVC KV-V8 Replacement of major parts Before starting disassembling, Pinch roller arm assembly

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2.2Replacement of major parts

2.2.1 Before starting disassembling

This mechanism has an exclusive operation mode provided for disassembling and installation of the mechanism (Mecha- nism assembling mode), and it is suggested to set the mechanism to this mode before disassembly and installation.The “Mechanism assembling mode” is not gen-

(B)

A/C head

A/C head board

erally used and becomes available by manual setting only. Then this procedure starts with the condition that the cabi- net parts and cassette housing assembly have been re- moved.

2.2.2How to set the “Mechanism assembling mode”

(1) Turn the loading motor belt by hand.

(2) Confirm that the hole of the control cam are aligned to the deck hole as shown in Fig.2-2-2a.

Loading motor belt

Hole align with hole in deck

Control cam

Fig. 2-2-2a

2.2.3Pinch roller arm assembly

(1) Remove the slit washer.

(2) Lift the pinch roller arm assembly, and pull out it while pushing the pinch plate toward outside.

Slit washer

Pinch roller arm assembly

Pinch plate

Fig.2-2-3a

2.2.4A/C head

1. How to remove

(1) Take out the 2 screws (A).

(2) Remove the A/C head with the head base.

(3) When replacing the A/C head only,remove the 3 screws (B), use care not to misplace the 3 springs.

(A)

Head base

(A)

Fig.2-2-4a

2-4

Pressure spring

Head base

Fig.2-2-4b

2. How to install

(1)Temporarily set tne A/C head height as indicated in Fig. 2-2-4c.

A/C head

Head base

5.7mm

Fig.2-2-4c

2.2.5Pinch plate 1. How to remove

(1) Disengage the 2 claws, then remove the pinch plate.

Pinch plate

Claw

Claw

Fig. 2-2-5a

2. How to install

(1)When installing the pinch plate,align rack of the pinch plate and triangle mark of the control cam as indicated in Fig. 2-2-5b.

Pinch plate

Control cam

Correct direction

Fig. 2-2-5b

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Contents KV-V8 Specificatios KV-V8J Adjustment information for installation Disassembly flow chartHow to read the disassembly and assembly Disassembly/assembly methodFig. D1 Fig. D4 Mechanism service mode Service positionHow to set the Service position How to set the Mechanism service modeFDP display model FDP display FDP Content Cause EMG detail information Mechanism sensor information Common table of MN*, HD* and M3 Checking for proper mechanical operations Before starting repair and adjustment PrecautionsJigs and tools required for adjustment Manually removing the cassette tape5a Mechanism assembly top side Tape CleaningLubrication DrivePinch roller arm assembly Replacement of major parts Before starting disassemblingHow to set the Mechanism assembling mode 4 A/C head How to removeLoading motor Lever assembly, sub deck assembly, capstan motorReel disk assembly take up Control bracketSlide plate Sub brake assembly take up, control camControl plate Remove the take up head and tension arm lever Change lever assembly, rotary encoderTake up head, tension arm lever Upper drum assembly Rotor assembly How to removeStator assembly Guide rail19a Attach the surrounding parts of the guide rail Rotary encoder, change lever assembly, control camLoading arm assemblies supply, take up Mechanism timing chart FM waveform linearity Compatibility adjustment NotesRepeat steps 1 to 10 by using the alignment tape A2 Play back the alignment tape a 3 A/C head phase X-valueHeight and tilt of the A/C head Standard tracking preset Tension pole positionSwitch settings and standard precautions PrecautionRequired adjustment tools Required test equipmentsSlow tracking preset KV-V8 No.49625
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