JVC KV-V8 manual

MOBILE VIDEO CASSETTE PLAYER No.49625 Feb. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. KV-V8 Area Suffix E J Continental Europe Nor th America Contents q Specifications q CA UTION q Instructions 1. DISASSEMBL Y 1.1 Disassembly flo w char t 1-1 1.2 How to read the disassemb ly and assembly 1-1 1.3 Disassembly/assemb ly method 1-1 1.4 Ser vice [...]

Specificatios (KV -V8J) General •Power supply : DC12 V (1 1V -16V allowable)Negative ground •Dimensions : 259 mm x 94 mm x 270 mm (10-1/4"x 3-3/4"x 10-1 1/16") (width x height x depth) •Mass : 3.2 kg (7.1 lbs) •Allowable working temperature : 0 °C to +40 °C (32 °F to104 °F) •Allowable relative humidity : 35%to 80% •Al[...]

1-1 [1] Top cover D1 2(S1a), (S1b), 2(S1c) [2] SW board assembly, D2 2(S2a), (WR2a), stay <Note 2a> Front panel assembly 4(L2a), 3(L2b), <Note 2b> CN3006(WR2b) [3] Cassette housing D3a, 2(S3a), 2(L3a) <Note 3a> assembly D3b [4] Drum assembly D4 CN1(WR4a), <Note 2a> CN1(WR4b), (S4a), (S4b), (S4c) [5] Mechanism assembly D5 CN1[...]

1-2 Fig. D2 Fig. D3b Fig. D3a Fig. D1 Rear side Pinch plate Loading motor belt Control cam Hole align with hole in deck <Note 3a> (S3a) (L3a) (L3a) [3] Cassette housing assembly Switch lev er REC safety s witch <Note 3a> (S3a) A (S1a) (S1c) (S1b) (S1c) (S1a) A [1] Top cover Detail “ G ” SW board Chassis Main board CN3006 Front board[...]

1-3 Fig. D4 Fig. D6 Fig. D5 Not used Inertia plate [4] Drum assembly (S4b) < e > (L5a) WR4a Supporting tape side <Note 2a> WR4b Supporting tape side <Note 2a> CN1 Not used (S4a) (S4c) (L5b) CN1 Not used Cleaner assembly <Note 5> < d > Note: When installing the Drum assembly, secure the screws (S4a – S4c) in the order[...]

1-4 Fig. 1-4-1a Main board assembly SW board assembly Front board assembly CN3006 CP5001 CP5002 CN7001 TP7002 GND TP7001 MECHA TEST TP111 D .FF TP4001 CTL.P TP106 PB FM TP2253 A FM 1.5 Mechanism service mode This model has a unique function to enter the mechanism into every operation mode without loading of any cassette tape. This function is calle[...]

1-5 1.6 Emergency display function This unit has a function for storing the history of the past two emergencies (EMG) and displaying them on each FDP (or OSD). With the status of the VCR and mechanism at the moment an emergency occurred can also be confirmed. Notes: • The EMG detail information <1><2> show the information on the lates[...]

1-6 1.6.3 EMG content description Note: EMG contents “ E08/E09 ” are for the model with Dynamic Drum (DD). Table 1-6-3a When the mechanism mode cannot be changed to an- other mode even when the loading motor has rotated for more than 4 seconds in the loading direction, [E:01] is identified and the power is turned off. When the mechanism mode ca[...]

1-7 1.6.4 EMG detail information <1> The status (electrical operation mode) of the VCR and the sta- tus (mechanism operation mode/sensor information) of the mechanism in the latest EMG can be confirmed based on the figure in EMG detail information <1> . [FDP/OSD display] * 1 : * 2 : 34 * 1 : Deck operation mode at the moment of EMG * 2 [...]

1-8 -0 -7 - Initial value -1 -0 - EJECT position - - -0 EJECT position (Cassette housing drive mode) -2 -7 - Housing operating - - -1 Between EJECT and U / L STOP -3 -1 -2 U / L STOP position - - -3 Guide arm drive position -4 -7 -4 Tape being loaded / unloaded (When the pole base is located on the front side of the position just beside the drum) -[...]

2-1 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 troub[...]

2-2 2.1.5 Maintenance and inspection 1. Location of major mechanical parts Fig. 2-1-5a Mechanism assembly top side Fig. 2-1-5b Mechanism assembly bottom side Control Cam Lever Assembly Guide Arm Assembly Pinch Roller Arm Assembly Belt (Loading Motor) Loading Motor Capstan Motor A/C Head Drum Assembly Stator Assembly Guide Rail FE Head Tension Arm A[...]

2-3 2. Cleaning Regular cleaning of the transport system parts is desirable but practically impossible. So make it a rule to carry out clean- ing of the tape transport system whenever the machine is serviced. When the video head, tape guide and/or brush get soiled, the playback picture may appear inferior or at worst disap- pear, resulting in possi[...]

2-4 2.2 Replacement 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- [...]

2-5 2.2.6 Loading motor (1) Remove the belt from the worm gear assembly. (2) Take out the 2 screws (A) and then remove the loading motor. Note: • When installing the loading motor, hold it so that the label faces upward. Also take care with the wire colors. Fig.2-2-6a 2.2.7 Lever assembly, sub deck assembly, capstan motor (1) First remove the bel[...]

2-6 Fig.2-2-9b 2.2.10 Control plate (1) Take out the slit washer, disengage the 2 hooks while lifting the control cam side of the control plate, and re- move the control plate. Notes: • After removing the control plate, be careful not to turn the main deck assembly upside down. Otherwise, parts such as the idler lever and clutch unit (take up) ma[...]

2-7 2.2.13 Change lever assembly, rotary encoder (1) Slide the change lever assembly in the direction of the arrow and remove. (2) While pushing the claws on both sides in the disengag- ing directions, take out the rotary encoder. (3) When attaching the rotary encoder, position it so that the alignment markings face each other as shown in Fig. 2- 2[...]

2-8 2.2.16 Guide rail (1) Take out the 5 screws (A) and 1 screw (B). (2) By expanding the rails on the outer sides of the guide rail, remove the 2 pole base assemblies (supply, take up). (3) Disengage the 4 claws and remove the guide rail. Note: • Before removing the guide rail, it is required to remove the drum assembly. Fig.2-2-16a 2.2.19 Upper[...]

2-9 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[...]

2-10 Fig. 2-3-2a 2.3.2 Loading arm assemblies (supply, take up) (1) Attach the loading arm assembly (supply) and loading arm assembly (take up) so that the alignment markings on their gears face each other and the holes on their arms are respectively aligned with the holes on the main deck. (2) Attach the guide rail, attach the pole base assemblies[...]

2-11 2.3.5 Control plate (1) Attach the control plate by aligning the 2 alignment holes on the control plate with the alignment holes on the main deck assembly as well as the alignment holes on the take up lever. As the take up lever is pulled by a tension spring, use a pair of tweezers or similar too to align the holes. (2) After attaching the con[...]

2-12 Fig. 2-5-1a Improper waveform variation Max level Min level Proper waveform variation Fig. 2-5-1b 1.25mm Roller driver Hexagonal wrench Tighten Loosen Guide roller 2.5 Compatibility adjustment Notes: • Although compatibility adjustment is very important, it is not necessary to perform this as part of the nor- mal servicing work. It will be r[...]

2-13 Fig. 2-5-1d Improper Proper ( a ) Guide roller ( b ) Guide pole Fig. 2-5-1c A B C D Level drop at the guide roller (supply side) Level drop at the guide roller (take-up side) • Proper waveform variation: Always flat • Improper waveform variation: Higher Lower 2.5.2 Height and tilt of the A/C head Note: • Set a temporary level of the heig[...]

2-14 2.5.4 Standard tracking preset Fig. 2-5-3b Fig. 2-5-3a Alignment tape [SP, stairstep] played with the SP head Alignment tape [EP(LP), stairstep] played with the EP(LP) head Drum side Control head position Capstan side X-value adjustment point Maximum Waveform output [Perform adjustment steps (7) to (10) only for 2 Head models equipped with LP [...]

3-1 SECTION 3 ELECTRICAL ADJUSTMENT 3.1 Precaution The following adjustment procedures are not only necessary after replacement of consumable mechanical parts or board assemblies, but are also provided as references to be re- ferred to when servicing the electrical circuitry . In case of trouble with the electrical circuitry , always begin a servic[...]

3-2 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 “ 7[...]

Printed in Japan 200102(S) No.49625 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan KV-V8[...]