JVC KV-V8 Before starting repair and adjustment Precautions, Manually removing the cassette tape

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SECTION 2

MECHANISM ADJUSTMENT

2.1 Before starting repair and adjustment

2.1.1 Precautions

(1)Unplug the power cord plug of the VCR before using your soldering iron.

(2)Take care not to cause any damage to the conductor wires when plugging and unplugging the connectors.

(3)Do not randomly handle the parts without identifying where the trouble is.

(4)Exercise enough care not to damage the lugs, etc. dur- ing the repair work.

(5)Install the cassette housing assembly only when the mechanism is in the “Mechanism assembling mode” po- sition. (See 2.2.2.)

(6)When reattaching the front panel assembly, make sure that the door opener of the cassette housing assembly is lowered in position prior to the reinstallation. (See SEC-

TION 1 DISASSEMBLY.)

(7)When checking the operation or performing adjustments to the VCP main unit, it is necessary to connect the power cable (Car Cable) to the VCP main unit so that DC power is supplied. Also, when using the remote control unit, it is required to connect the IR receiver. (by using either the provided or optional accessories)

2.1.2 Checking for proper mechanical operations

Enter the mechanism service mode when you want to oper- ate the mechanism when no cassette is loaded. (See 1.5 Mechanism service mode.)

2.1.3 Manually removing the cassette tape

If you cannot remove the cassette tape which is loaded be- cause of any electrical failure, manually remove it by taking the following steps.

(1)Unplug the power cord plug from the power outlet.

(2)Refer to the disassembly procedure and perform the dis- assembly of the major parts before removing the Cas- sette housing assembly.

(3)Unload the pole base assembly by manually turning the loading motor of the mechanism assembly toward the front. In doing so, hold the tape by the hand to keep the slack away from any grease. (See Fig.2-1-3a.)

(4)Bring the pole base assembly and guide arm assembly to a pause when it reaches the position where it is hid- den behind the cassette tape.

(5)Remove the cassette housing assembly by holding both the slackened tape and the cassette lid.

(6)Take up the slack of the tape into the cassette. This com- pletes removal of the cassette tape.

Note:

•For the disassembly procedure of the major parts and details of the precautions to be taken, see “1.3 Disas- sembly/assembly method”.

Loading motor

Guide arm assembly

Pole base bssembly

Fig. 2-1-3a

2.1.4 Jigs and tools required for adjustment

Roller driver

A/C head positioning tool

Torque gauge

PTU94002

PTU94010

PUJ48075-2

Back tension cassette gauge

Jig RCU

Alignment tape

PUJ48076-2

PTU94023B

(SP, stairstep, NTSC)

 

 

MHP

Alignment tape

Alignment tape

Alignment tape

(EP, stairstep, NTSC)

(SP, stairstep, PAL)

(LP, stairstep, PAL)

MHP-L

MHPE

MHPE-L

2-1

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Contents KV-V8 Specificatios KV-V8J Disassembly/assembly method Disassembly flow chartHow to read the disassembly and assembly Adjustment information for installationFig. D1 Fig. D4 How to set the Mechanism service mode Service positionHow to set the Service position Mechanism service modeFDP display model FDP display FDP Content Cause EMG detail information Mechanism sensor information Common table of MN*, HD* and M3 Manually removing the cassette tape Before starting repair and adjustment PrecautionsJigs and tools required for adjustment Checking for proper mechanical operations5a Mechanism assembly top side Drive CleaningLubrication Tape4 A/C head How to remove Replacement of major parts Before starting disassemblingHow to set the Mechanism assembling mode Pinch roller arm assemblyControl bracket Lever assembly, sub deck assembly, capstan motorReel disk assembly take up Loading motorSlide 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 Guide rail Rotor assembly How to removeStator assembly Upper drum assembly19a 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 Tension pole position Standard tracking presetRequired test equipments PrecautionRequired adjustment tools Switch settings and standard precautionsSlow tracking preset No.49625 KV-V8
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