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KV-V8
SERVICE MANUAL
MOBILE VIDEO CASSETTE PLAYER
KV-V8
Comparison table
Item KV-V8E KV-V8J
Area Suffix
Signal system PAL NTSC
E Continental Europe
Area Continental Europe U.S.A.
J North America
Contents
q Specifications
q CAUTION
q Instructions
3. ELECTRICAL ADJUSTMENT
1. DISASSEMBLY
3.1 Precaution .................................................... 3-1
1.1 Disassembly flow chart ...................................... 1-1
3.2 Servo circuit .................................................
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Specificatios (KV-V8J) General •Power supply : DC12 V (11V-16V allowable)Negative ground •Dimensions : 259 mm x 94 mm x 270 mm (10-1/4"x 3-3/4"x 10-11/16") (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% •Allowable conservation temperature : -20 °C to +60 °C (-4 °F to 140 °F) Video •Playback system : VHS format,Hi-Fi 4-heads helical scan •Video signal : VHS NTSC standard Audio •Playback sy
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SECTION 1 DISASSEMBLY 1.3 Disassembly/assembly method 1.1 Disassembly flow chart Step/ Fig. This flowchart lists the disassembling steps for the cabinet Point Note Part Name No. Loc No. parts and P.C. boards in order to gain access to item(s) [1] Top cover D1 2(S1a), (S1b), 2(S1c) to be serviced. When reassembling, perform the step(s) in [2] SW board assembly, D2 2(S2a), (WR2a), stay reverse order. Bend, route and dress the flat cables as they ------------------- Front panel assembly
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(S3a) (S3a) (S1c) [1] Top cover (S1b) (L3a) (S1c) (S1a) [3] Cassette housing assembly Switch lever A (L3a) (S1a) A REC safety switch Fig. D1 Fig. D3a (S2a) Stay (S2a) [2] SW board assembly WR2a Loading motor belt G Rear side Pinch plate WR2b Foil side (L2a) CN3006 Hole align with hole in Door opener (L2a) “a” deck [2] Front panel assembly Detail “G” Control cam SW board WR2a (L2b) WR2b Chassis Front Main board board CN3006 Fig. D2 Fig. D3b 1-2
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Note: When installing the Drum assembly, secure the screws (S4a – S4c) (S6b) (S6a) in the order of a , b , c . Not used [6] Main board Inertia plate assembly WR4a (L5b) Supporting tape side (S4a) WR4b (S4c) Not used Supporting Cleaner assembly tape side CN1 (S4b) [4] < d > (L5a) Drum assembly CN1 < e > Not used Fig. D6 Fig. D4 (S5a) Not used WR4 WR5a (S5b) WR5c WR5b Red line: CN1 CN3003 pin1 [5] Mechanism assembly CN3005 CN3003 (L5a) Spacer Fig. D5 1-3
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1.4 Service position This unit has been designed so that the Mechanism and Main Main board assembly board assemblies can be removed together from the chas- TP4001 TP2253 sis assembly. Before diagnosing or servicing the circuit CTL.P A FM boards, take out the major parts from the chassis assembly. TP111 TP106 D.FF PB FM 1.4.1 How to set the "Service position” (1) Refer to the disassembly procedure and perform disas- sembly of the major parts before removing the Cassette housing assembly. (2) Remo
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1.6.1 Displaying the EMG information 1.6 Emergency display function (1) Transmit the code “59” from the Jig RCU. This unit has a function for storing the history of the past two The FDP shows the EMG content in the form of “E:**:** ”. emergencies (EMG) and displaying them on each FDP (or OSD). With the status of the VCR and mechanism at the moment an Example 1 E : 01 : 03 emergency occurred can also be confirmed. Previous EMG FDP display model Latest EMG [FDP display] 0 : 00 : 00 Normal d
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1.6.3 EMG content description Note: EMG contents “E08/E09” are for the model with Dynamic Drum (DD). FDP CONTENT CAUSE E01: Loading EMG When the mechanism mode cannot be changed to an- 1. The mechanism is locked in the middle of mode transition. 2. The mechanism is locked at the loading end due to the encoder position other mode even when the loading motor has rotated for more than 4 seconds in the loading direction, [E:01] reading error during mode transition. 3. Power is not supplied to the lo
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1.6.4 EMG detail information <1> * 2 : Mechanism operation mode [Common table of MN* and M3*] The status (electrical operation mode) of the VCR and the sta- tus (mechanism operation mode/sensor information) of the Display Mechanism operation mode mechanism in the latest EMG can be confirmed based on the MN* M3* 00 00 Command standby (Status without executing command) figure in EMG detail information <1> . 02 02 POWER OFF by EMG occurrence 04 04 Moving to the adjacent position in the LOAD dir
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3– : Mechanism sensor information Note: [Common table of MN*, HD* and M3*] • EMG detail information <2> is the reference information stored using the remaining tape detection function of the Mechanism sensor information Display MN* / HD* M3* REC safety Start End cassette tape. As a result, it may not identify cassette cor- S-VHS SW CASS SW SW sensor sensor rectly when a special cassette tape is used or when the 0- VHS Cassette insertion Tab broken ON ON tape has variable thickness. 1- VHS Casse
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SECTION 2 MECHANISM ADJUSTMENT 2.1 Before starting repair and adjustment Loading motor 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 th
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2.1.5 Maintenance and inspection 1. Location of major mechanical parts Drum Assembly A/C Head Capstan Motor Stator Assembly Loading Motor Guide Rail Belt (Loading Motor) FE Head Pinch Roller Arm Assembly Guide Arm Assembly Tension Arm Assembly Pole Base Assembly (SUP) Lever Assembly Control Plate Control Cam Change Lever Assembly Tension Band Assembly Slide Plate Reel Disk Assembly Reel Disk Assembly (TU) (SUP) Pole Base Assembly (TU) Fig. 2-1-5a Mechanism assem
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2. Cleaning 4. Suggested servicing schedule for main components Regular cleaning of the transport system parts is desirable The following table indicates the suggested period for such but practically impossible. So make it a rule to carry out clean- service measures as cleaning,lubrication and replacement. ing of the tape transport system whenever the machine is In practice, the indicated periods will vary widely according serviced. to environmental and usage conditions.However, the indi- When t
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2.2 Replacement of major parts (B) A/C head 2.2.1 Before starting disassembling board 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 A/C head mechanism to this mode before disassembly and installation.The “Mechanism assembling mode” is not gen- Pressure spring erally used and becomes available by manual setting only. Then this procedure starts with the condition that the c
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2.2.6 Loading motor (B) (1) Remove the belt from the worm gear assembly. (B) (2) Take out the 2 screws (A) and then remove the loading motor. Sub deck assembly Note: • When installing the loading motor, hold it so that the label faces upward. Also take care with the wire colors. Red line Label (Top view) (to pin 1 of connector for the loading motor) Loading motor (A) Capstan motor (A) Fig.2-2-7c Worm gear assembly Belt 2.2.8 Control bracket (1) Take out the screw (A) and screw (B). Fig.2-2-6a
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Reel disk assembly (take up) Control cam Claw (a) Sub brake assembly (take up) Fig.2-2-9b (a) 2.2.10 Control plate Hook Spring (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. Fig.2-2-11a Notes: 2.2.12 Slide plate • After removing the control plate, be careful not to turn the main deck assembly upside down. Otherwise, parts (1) Disengage the 7 claws on the back side of the mecha- such as the idler lever a
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2.2.13 Change lever assembly, rotary encoder (1) Slide the change lever assembly in the direction of the arrow and remove. Tension arm assembly (2) While pushing the claws on both sides in the disengag- ing directions, take out the rotary encoder. Tension arm lever (3) When attaching the rotary encoder, position it so that the alignment markings face each other as shown in Fig. 2- 2-13a, then attach the rotary encoder. Notes: • Before removing the change lever assembly, it is re- quired to remov
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2.2.18 Rotor assembly 2.2.16 Guide rail (1) Take out the 5 screws (A) and 1 screw (B). 1. How to remove (1) Remove the stator assembly. (2) By expanding the rails on the outer sides of the guide (2) Remove the two screws (B) and remove the rotor assem- rail, remove the 2 pole base assemblies (supply, take up). (3) Disengage the 4 claws and remove the guide rail. bly. Note: 2. How to install • Before removing the guide rail, it is required to remove (1) Match the phases of the upper drum assemb
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Collar Spring assembly 1.5 mm hexagonal wrench Loosen Brush Cap Upper drum assembly Collar Upper drum assembly Washer assembly Shaft Lower drum assembly Fig. 2-2-19c Press 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
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2.3.2 Loading arm assemblies (supply, take up) Rotary encoder (1) Attach the loading arm assembly (supply) and loading arm Position assembly (take up) so that the alignment markings on Claw their gears face each other and the holes on their arms Claw are respectively aligned with the holes on the main deck. Align the triangle marks (2) Attach the guide rail, attach the pole base assemblies onto the extremities of the arms, then perform the unloading operation so that the pole base assemblies co
