JVC KV-V8 service manual 19a

Page 19

Collar

Springassembly 1.5 mm

hexagonal wrench

BrushLoosen

Cap

Upper drum assembly

Washer

Shaft

Lower drum assembly

Fig. 2-2-19a

2. How to install

(1)Clean the coil parts of the lower drum assembly and the newly installed upper drum assembly with an air brush in advance. (See Fig.2-2-19b.)

(2)Install a new washer and upper drum assembly on the drum shaft. (See Fig.2-2-19a.)

(3)Install the cap to the upper drum assembly.

(4)Position the collar assembly as indicated in Fig.2-2-19c while controlling its up- down movement.

(5)Secure the collar assembly in position with a hexagonal wrench while pressing its top with the fingers.

(6)After installation, gently turn the upper drum assembly with your hand to make sure that it turns normally. Then install the brush and the spring.

(7)Install the rotor assembly and stator assembly according to Fig 2-2-17a and 2-2-18a.

(8)When installation is complete, clean the upper drum as- sembly and lower drum assembly and carry out the fol- lowing adjustments.

•PB switching point adjustment

•Slow tracking adjustment

•Compatibility adjustment (Be sure to check for compat- ibility for the EP (or LP) mode.)

Lower drum assembly

Coil parts

Upper drum assembly

Fig. 2-2-19b

Upper drum

Collar

assembly

assembly

 

Fig. 2-2-19c

Press

Collar

Tighten

 

assembly

 

Fig. 2-2-19d

2.3Installation of major parts (Mechanism phase align- ment)

2.3.1 Before assembly

The mechanism of this model is closely related with the ro- tary encoder and the system control circuitry. The connec- tion between the rotary encoder and control cam determines the movement of all mechanical parts including the slide plate, loading arm assembly, control plate and brake. If these parts are not installed in the correct positions, operations such as loading and unloading will not be possible.

Installation of the major parts (mechanism phase alignment) should be performed exclusively in the mechanism assem- bling mode, as with the operations in the previous sections.

2-9

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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 motorControl plate Sub brake assembly take up, control camSlide plate Take up head, tension arm lever Change lever assembly, rotary encoderRemove the take up head and tension arm lever Guide rail Rotor assembly How to removeStator assembly Upper drum assembly19a Loading arm assemblies supply, take up Rotary encoder, change lever assembly, control camAttach the surrounding parts of the guide rail Mechanism timing chart Repeat steps 1 to 10 by using the alignment tape A2 Compatibility adjustment NotesFM waveform linearity Height and tilt of the A/C head 3 A/C head phase X-valuePlay back the alignment tape a 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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