JVC KV-V8 service manual Slow tracking preset

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3.2.2 Slow tracking preset

Signal	(A1)		• Color (colour) bar or stairstep signal
			- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
			[KV-V8E]
	(A2)		• Alignment tape [MH-2] or [MHPE]
	(A3)		• Alignment tape [MH-2L] or [MHPE-L]
			- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
			[KV-V8J]
	(A2)		• Alignment tape [MH-1] or [MHP]
	(A3)		• Alignment tape [MH-1L] or [MHP-L]

Measuring point	(D)		• TV-Monitor

Adjustment part	(F)		• Jig RCU: Code “71” or “72”

Specified value	(G)		• Minimum noise

Adjustment tool	(H)		• Jig RCU [PTU94023B]

(1)Play back the signal (A1) of the alignment tape (A2).

(2)Set the VCR to the manual tracking mode.

(3)Set the VCR to the FWD slow (+1/6x) mode.

(4)Transmit the code (F) from the Jig RCU to adjust so that the noise bar becomes the specified value (G) on the TV monitor in the slow mode.

(5)Set the VCR to the Stop mode.

(6)Confirm that the noise bar is (G) on the TV monitor in the slow mode.

(7)Repeat steps (3) to (6) in the REV slow (-1/6x) mode.

(8)Play back the signal (A1) of the alignment tape (A3).

(9)Repeat steps (2) to (7).

Note:

•For FWD slow (+1/6x) playback, transmit the code “08” from the Jig RCU to enter the slow playback mode, and transmit the code “D0” for REV slow (-1/6x) mode.

3-2

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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