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VIDEO CASSETTE RECORDER
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SERVICE MANUAL
VIDEO CASSETTE RECORDER
HR-J691U/J694U/J695U/J698U
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-J698U.)
GENERAL
Power requirement Power consumption Power on Power off Temperature Operating Storage Operating position Dimensions (W x H x D) : AC 120 Vd, 60 Hz : 13 W : 1.5 W 5°C to 40°C (41°F to 104°F) 20°C to 60°C (4°F to 140°F) Horizontal only 435 mm x 94 mm x 247 mm (17-1/4" x 3-3/4" x 9-3/4") : 2.7 kg (6.6 lbs) : VHS NTSC standard : : : :
TUNER
Tuning system Channel coverage VHF UHF CATV RF output : Frequency-synthesized tuner : : : : Channels 213 Channels 1469 113 Channels Channel 3, 4 or (off) (preset to Channel 3 when shipped) 75 ohms, unbalanced
TIMER
Clock reference Program capacity : Quartz : 1-year programmable timer/ 8 programs
Weight Format Maximum recording time SP : 210 min. with ST-210 video cassette EP : 630 min. with ST-210 video cassette
ACCESSORIES
Provided accessories : RF cable (F-type), Infrared remote control unit, "AA" battery x 2
VIDEO/AUDIO
Signal system : NTSC-type color signal and EIA monochrome signal, 525 lines/ 60 fields : DA-4 (Double Azimuth) head helical scan system : 45 dB : 230 lines : 70 Hz to 10,000 Hz : 20 Hz to 20,000 Hz : RCA connectors (IN x 1, OUT x 1)
Recording/Playback system Signal-to-noise ratio Horizontal resolution Frequency range Normal audio Hi-Fi audio Input/Output
Specifications shown are for SP mode unless specified otherwise. E. & O.E. Design and specifications subject to change without notice.
HR-J691U/J691U(C)/J694U/J695U(C)/J698U(C)
V15D1
This service manual is printed on 100% recycled paper. COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
No.82904 January 2002
TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions INSTRUCTIONS 1. DISASSEMBLY 1.1 Manually removing the cassette tape .......................... 1-1 1.2 Removing the major parts ............................................ 1-2 1.2.1 How to read the procedure table ............................. 1-2 1.2.2 Disassembly/assembly method .............................. 1-2 1.3 Emergency display function ......................................... 1-4 1.3.1 Displaying the EMG information ............................. 1-4 1.3.2 Clearing the EMG history ........................................ 1-4 1.3.3 Details of the OSD display in the EMG display mode ... 1-5 1.3.4 EMG content description ......................................... 1-6 1.3.5 EMG detail information<1> ..................................... 1-7 1.3.6 EMG detail information<2> ..................................... 1-8 1.3.7 EMG detail information<3> ..................................... 1-8 1.4 Service position ............................................................ 1-9 1.4.1 How to set the "Service position" ............................ 1-9 1.5 Jig RCU mode .............................................................. 1-9 1.5.1 Setting the Jig RCU mode ...................................... 1-9 1.5.2 Setting the User RCU mode ................................... 1-9 1.6 Mechanism service mode ............................................ 1-9 1.6.1 How to set the "Mechanism service mode" ............. 1-9 1.6.2 How to exit from the "Mechanism service mode" .... 1-9 1.7 Maintenance and inspection ...................................... 1-10 1.7.1 Cleaning ................................................................ 1-10 1.7.2 Lubrication ............................................................ 1-10 1.7.3 Suggested servicing schedule for main components ... 1-10 2. DISASSEMBLING/ASSEMBLING OF MECHANISM 1. Before disassembling/assembling ................................. 2-1 1.1 Notes ........................................................................... 2-1 1.2 Mechanism operation check ....................................... 2-1 1.3 Setting the mechanism assembling mode .................. 2-1 1.4 Layout of the main mechanism parts .......................... 2-2 1.5 Disassembling procedure table ................................... 2-3 2. Replacement of the main mechanism parts ................... 2-4 2.1 Cassette holder ........................................................... 2-4 2.2 A/C head ..................................................................... 2-5 2.3 Guide arm, pinch roller arm ........................................ 2-6 2.4 Idler arm, idler gear 1/2 ............................................... 2-6 2.5 Main brake(T), brake lever, tension arm, reel disk(S/T), Rec safety lever ................................... 2-6 2.6 Press lever, control cam, capstan brake assembly, loading motor assembly .............................................. 2-7 2.7 Capstan motor, load gear, control plate ...................... 2-8 2.8 Clutch unit assembly, direct gear ................................ 2-9 3. Mechanism timing chart ............................................... 2-10 3. ADJUSTMENT 3.1 Precaution .................................................................... 3-1 3.1.1 Required test equipments ....................................... 3-1 3.1.2 Required adjustment tools ...................................... 3-1 3.1.3 Color(colour) bar signal, color(colour) bar pattern .. 3-1 3.1.4 Switch settings ........................................................ 3-1 3.1.5 Manual tracking mode (Auto tracking ON/OFF) setting ... 3-1 3.2 Mechanism compatibility adjustment ........................... 3-2 3.2.1 Tension pole position ............................................... 3-2 3.2.2 FM waveform linearity ............................................. 3-2 3.2.3 Height and tilt of the A/C head ................................ 3-3 3.2.4 A/C head phase(X-value) ........................................ 3-3 3.3 Electrical Adjustment .................................................... 3-4 3.3.1 Servo circuit ............................................................ 3-4 3.3.1.1 Switching point ................................................... 3-4
4. CHARTS AND DIAGRAMS 4.1 BOARD INTERCONNECTIONS ................................ 4-3 4.2 MAIN(VIDEO/N.AUDIO) SCHEMATIC DIAGRAM ..... 4-5 4.3 MAIN(SYSCON) SCHEMATIC DIAGRAM ................. 4-7 4.4 MAIN(SW.REG) SCHEMATIC DIAGRAM .................. 4-9 4.5 MAIN(TUNER) SCHEMATIC DIAGRAM .................. 4-11 4.6 MAIN(FMA/DEMOD) SCHEMATIC DIAGRAM ........ 4-13 4.7 MAIN(FRONT) SCHEMATIC DIAGRAM .................. 4-15 4.8 MAIN(TERMINAL) SCHEMATIC DIAGRAM ............ 4-17 4.9 MAIN CIRCUIT BOARD ........................................... 4-19 4.10 REMOTE CONTROLLER SCEMATIC DIAGRAM . 4-21 4.11 FDP GRID ASSIGNMENT AND ANODE CONNECTION . 4-21 4.12 WAVEFORMS ........................................................ 4-22 4.13 VOLTAGE CHARTS ............................................... 4-23 4.14 CPU PIN FUNCTION ............................................. 4-24 4.15 SYSTEM CONTROL BLOCK DIAGRAM ............... 4-25 4.16 VIDEO BLOCK DIAGRAM ..................................... 4-27 4.17 AUDIO BLOCK DIAGRAM ..................................... 4-29 5. PARTS LIST 5.1 PACKING AND ACCESSORY ASSEMBLY ........ 5-1 5.2 FINAL ASSEMBLY .............................................. 5-2 5.3 MECHANISM ASSEMBLY .................................. 5-4 5.4 ELECTRICAL PARTS LIST .......................................... 5-6 MAIN BOARD ASSEMBLY<03> ...................................... 5-6 A/C HEAD BOARD ASSEMBLY<12> ............................ 5-10 LOADING MOTOR BOARD ASSEMBLY<55> ............... 5-10
The following table lists the differing points between models HR-J691U, J691U(C), J694U, J695U(C) and J698U(C).
MODEL ITEM BODY COLOR RCU ILUMINATION FUNCTION CHILD LOCK Notes: Mark is same as left. HR-J691U BLACK NOT USED NOT USED HR-J691U(C) HR-J694U HR-J695U(C) PURE-SILVER USED HR-698U(C) BLACK USED NOT USED
Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
Precautions during Servicing
1. Locations requiring special caution are denoted by labels and inscriptions on the cabinet, chassis and certain parts of the product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals. symbol and shaded ( ) parts are 2. Parts identified by the critical for safety. Replace only with specified part numbers. Note: Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission. 3. Fuse replacement caution notice. Caution for continued protection against fire hazard. Replace only with same type and rated fuse(s) as specified. 4. Use specified internal wiring. Note especially: 1) Wires covered with PVC tubing 2) Double insulated wires 3) High voltage leads 5. Use specified insulating materials for hazardous live parts. Note especially: 1) Insulation Tape 3) Spacers 5) Barrier 2) PVC tubing 4) Insulation sheets for transistors 6. When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering. Fig.4 (3) Align the lengths of the wires to be connected. Insert the wires fully into the connector. Fig.1 7. Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.) 8. Check that replaced wires do not contact sharp edged or pointed parts. 9. When a power cord has been replaced, check that 10-15 kg of force in any direction will not loosen it. 12. Crimp type wire connector In such cases as when replacing the power transformer in sets where the connections between the power cord and power transformer primary lead wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps. 1) Connector part number : E03830-001 2) Required tool : Connector crimping tool of the proper type which will not damage insulated parts. 3) Replacement procedure (1) Remove the old connector by cutting the wires at a point close to the connector. Important : Do not reuse a connector (discard it).
cut close to connector
Fig.3 (2) Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.
15 mm
Metal sleeve
Connector
Fig.5 (4) As shown in Fig.6, use the crimping tool to crimp the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool.
Power cord
1.2 5 2.0 5.5
Crimping tool
Fig.2 10. Also check areas surrounding repaired locations. 11. Products using cathode ray tubes (CRTs) In regard to such products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission. Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts. Under no circumstances attempt to modify these circuits. Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray tube.
Fig.6 (5) Check the four points noted in Fig.7.
Not easily pulled free Crimped at approx. center of metal sleeve
Conductors extended Wire insulation recessed more than 4 mm
Fig.7
1
S40888-01
Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. 1. Insulation resistance test Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below. 2. Dielectric strength test Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below. 3. Clearance distance When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic parts. See table 1 below. Chassis Fig. 8 4. Leakage current test Confirm specified or lower leakage current between earth ground/power cord plug prongs and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). Measuring Method : (Power ON) Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following table 2.
d d'
Power cord, primary wire
a
b c
Externally exposed accessible part
Z V
Fig. 9 5. Grounding (Class 1 model only) Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.). Measuring Method: Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
AC inlet
Exposed accessible part
Grounding Specifications Region USA & Canada Europe & Australia Grounding Impedance (Z) Z 0.1 ohm Z 0.5 ohm
Earth pin Milli ohm meter
Fig. 10
AC Line Voltage 100 V 100 to 240 V 110 to 130 V 110 to 130 V 200 to 240 V Japan
Region
Insulation Resistance (R) R 1 M/500 V DC 1 M R 12 M/500 V DC R 10 M/500 V DC
Dielectric Strength AC 1 kV 1 minute AC 1.5 kV 1 miute AC 1 kV 1 minute AC 3 kV 1 minute (Class 2) AC 1.5 kV 1 minute (Class 1)
Clearance Distance (d), (d') d, d' 3 mm d, d' 4 mm d, d' 3.2 mm d 4 mm d' 8 mm (Power cord) d' 6 mm (Primary wire)
USA & Canada Europe & Australia
Table 1 Specifications for each region
AC Line Voltage 100 V 110 to 130 V 110 to 130 V 220 to 240 V
Region Japan USA & Canada
0.15 µF
Load Z
1 k
Leakage Current (i) i 1 mA rms i 0.5 mA rms i 0.7 mA peak i 2 mA dc i 0.7 mA peak i 2 mA dc
a, b, c Exposed accessible parts Exposed accessible parts Antenna earth terminals Other terminals
1.5 k 2 k 50 k
Europe & Australia
Table 2 Leakage current specifications for each region Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
2
S40888-01
SECTION 1 DISASSEMBLY
1.1 Manually removing the cassette tape If you cannot remove the cassette tape which is loaded because of any electrical or mechanical failures, manually remove it by taking the following steps. (1) Unplug the power cord plug from the power outlet. (2) Refer to the disassembly procedure of the VCR and perform the disassembly of the major parts before removing the mechanism assembly. (refer to Fig. 1-1a) In case of mechanical failures, while keeping the tension arm assembly free from tension, pull out the tape on the pole base assembly. Take the spring(a) of the pinch roller arm assembly off the hook, and detach it from the tape. (4) Remove the screw (a) of the side frame (L/R). (5) Hold the slack tape and cassette cover together, lift the cassette tape, top frame, cassette holder and side frames (L, R) together from the rear and remove them by disengaging the hooks (a) and (b).
Screw(a) Cassette tape Cassette holder Top frame Side frame(R) Screw(a)
Fig. 1-1a (3) Unload the pole base assembly by manually turning the gear of the loading motor until the pole base assembly is hidden behind the cassette lid. In doing so, hold the tape by the hand to keep the slack away from any grease.
Tension arm assembly Pole base assembly Pinch roller arm assembly
Hook(a) Side frame(L) Hook(b)
Fig. 1-1c (6) Take up the slack of the tape into the cassette. This completes removal of the cassette tape.
Spring(a)
Direction of unloading
Fig. 1-1b 1-1
1.2 Removing the major parts 1.2.1 How to read the procedure table
Door opener
This table shows the steps for disassembly of the externally furnished parts and board assemblies. Reverse these steps when re-assembling them.
Step/ Part Name Loc No. [1] Top cover, Fig. Point Note No. 1-3a 4(S1a),(S1b),3(L1a), 2(SD1a),(P1a),(W1a), CN1(WR1a), ---------------------------------------2(S1c)
Side frame(R)
Switch knob
Switch lever
Bracket
(1)
(2)
(3)
(4)
(5)
(1) Order of steps in Procedure When reassembling, perform the step(s) in the reverse order. These numbers are also used as the identification (location) No. of parts Figures. (2) Part name to be removed or installed. (3) Fig. No. showing procedure or part location. (4) Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped or unsoldered. P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder, CN**(WR**)= Remove the wire (WR**) from the connector (CN**). Note: · The bracketed ( ) WR of the connector symbol are assigned nos. in priority order and do not correspond to those on the spare parts list. (5) Adjustment information for installation 1.2.2 Disassembly/assembly method
Step/ Part Name Loc No. [1] Top cover [2] Front panel assembly [3] Mechanism assembly (Drum Shield) (Drum assembly) [4] Main board assembly Fig. Point No. 1-2-2d 3(S1a) 1-2-2d 2(S2a), 4(L2a), 3(L2b) 1-2-2a 1-2-2d CN2001(WR3a), (S3a), (S3b) -------------------------(S3f), (L3a) --------------------------1-2-2b CN1(WR3b), 1-2-2c (S3c), (S3d), (S3e) 1-2-2d 2(L4a), (L4b), (L4c) Note
Fig. 1-2-2a · Be careful not to damage the connector and wire etc. during connection and disconnection. · When connecting the flat wire to the connector, be careful with the flat wire direction. · When reattaching the Mechanism assembly, secure the screws (S3a to S3b) in the order of a, b. · When reattaching the Mechanism assembly, be sure to align the phase of the Rotary encoder on the Main board assembly. · When reattaching the Mechanism assembly, set the "Mechanism assembly mode" (See "Mechanism disassembly/assembly"). · When reattaching the Mechanism assembly to the Main board assembly, take care not to damage the sensors and switch on the Main board assembly. · When reattaching the Drum assembly, secure the screws (S3c to S3e) in the order of c, d, e.
(S3d) (S3c) (S3e) (S3d) (S3e)
(S3c)
HOOK
Attach the Drum assembly appropriately, since the installation state of the Drum assembly influences the FM WAVEFORM LINEARITY greatly.
Fig. 1-2-2b · When handling the drum assembly alone, hold it by the motor or shaft. Be careful not to touch other parts, especially the video heads. Also take care not to damage the connectors.
· When reattaching the Front panel assembly, make sure that the door opener of the Side frame (R) is lowered in position prior to the reinstallation. · When reattaching the Front panel assembly, pay careful attention to the switch lever of the Front panel assembly not to make it touch the switch knob of the Main board assembly from the side. · When reattaching the Front panel assembly, lift the Cassette door slightly.
Shaft Motor Video heads
Fig. 1-2-2c
1-2
(S3f)
Drum Shield Drum assembly (S3a) FFC WIRE remove from the A/C HEAD BASE and put MECHA UNIT on CHASSIS. (WR3a) (S3b) Mechanism assembly
b
(S1a)
(S2a)
Top cover
NOTE) HANG THE HOOK OF THE TOP COVER IN HOLD OF CHASSIS.
a
(S3c)
(S2a)
a
(S3e) (S3d)
b
"A"
REAR SIDE
The SHIELD CASE of the MAIN PWB is bent from part A and MECHA CHASSIS is put.
Main board assembly
Switch knob
a
c
Must confirm soldering condition as no soldering and dry soldering at portion of Power cord lead on Main pwb before attach Main pcb to Bottom chassis.
Hang the hook of the T.Board in hole of CHASSIS. (L4c) (L4b)
a
JS3001
Bottom chassis
(L3a)
Accord the position of V gap on R. Encoder and PWB silk " ". Accord the position of Boss on R. Encoder and PWB silk " ".
c
Front panel assembly (L2a) (L2b)
z
b z
For the prevention of the DRUM FPC damage. When you attach the MECHA UNIT on B. CHASSIS. Attach the MECHA UNIT after the positioning boss "z" of the B. CHASSIS is matched to the positioning hole of the MECHA UNIT.
(L2a)
Cassette door
(L2b)
(L3a)
Be careful to insert that will not be slanting,and will not be From CAPSTAN MDA pushing of PRESS LEVER. right side (WR3b) Wire is bent to rear side NEUTRAL NOTE
(WHITE LINE)
1. Insert direction of FFC WIRE as follows.
Right side Back side supporting side
NEUTRAL (WHITE LINE)
electrode side
2. FFC WIRE and DRUM FPC WIRE should be insert as follows.
Right side
OK 90
CN
FW3001
NG
PRESS LEVER
CN
CN
The power code not touch the power supply PRIMARY side and the mechanics chassis.
(L4a) Hang the hook of CHASSIS on the PWB.
(L4a) Hang the hook of CHASSIS on the PWB.
Fig. 1-2-2d 1-3
1.3 Emergency dispaly function This unit saves details of the last two emergencies as the EMG history and allows the status of the VCR and the mechanism of each emergency to be shown both on the display and as OSD information. When using the emergency function, it is required to set the VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received).
Jig RCU [Data transmitting method] Depress the " " ( 3 ) button after the data code is set.
0 : 00 : 00 Normal display (Counter or clock) E: * * : * * EMG content display (E:Latest:Previous) [EMG code display mode] See 1.3.4.
*1: *2 : 34 EMG detail information <1> display [Deck and other mode display mode] *5: *6 : *7 EMG detail information <2> display [Cassette display mode] *8: *9 : *10 EMG detail information <3> display [Deck mode history dispaly mode]
See 1.3.5. See 1.3.6. See 1.3.7.
INITIAL MODE CUSTOM CODE 43: A CODE DATA CODE
Fig. 1-3-1b EMG dislay of FDP display model EMG display of FDP display mode
(1) Transmit the code "59" from the Jig RCU. The FDP shows the EMG content in the form of "E: * * : * * ".
E : 01 : 03 Previous EMG Latest EMG E : : No EMG record
Fig. 1-3a Jig RCU [PTU94023B]
1.3.1 Displaying the EMG information The EMG detail of information can be displayed by transmitting the code "59" from the Jig RCU.
Note: · The EMG detail information <1><2> show the information on the latest EMG. It becomes " : : " when there is no latest EMG record.
0: 00 E: * * 1E: * * 1: * 1
Normal display EMG content display (Latest) EMG content display (Previous) See 1.3.4. See 1.3.4.
(2) Transmit the code "59" from the Jig RCU again. The FDP shows the EMG detail information <1> in the form of " * 1 : * 2 : 34 ". * 1 : Deck operation mode at the moment of EMG * 2 : Mechanism operation mode at the moment of EMG 3 : Mechanism sensor information at the moment of EMG 4 : Mechanism mode position at the moment of EMG (3) Transmit the code "59" from the Jig RCU once again. The FDP shows the EMG detail information <2> in the form of " * 5 : * 6 : * 7 ". * 5 : Type of the cassette tape in use <1> . * 6 : Winding position of the cassette tape in use * 7 : Type of the cassette tape in use <2> (Winding area) (4) Transmit the code "59" from the Jig RCU once again. The FDP shows the EMG detail information <3> in the form of "*8 : *9 : *10". * 8 : Previous deck operation mode at the moment of EMG * 9 : The deck operation mode of the one before the last at the moment of EMG * 10 : The deck operation mode of the one prior to one above at the moment of EMG (5) Transmit the code "59" from the Jig RCU once again to reset the display. 1.3.2 Clearing the EMG history
EMG detail information <1> See 1.3.5. [Deck operation mode] 2: * 2 EMG detail information <1> See 1.3.5. [Mechanism operation mode] 3: 34 EMG detail information <1> See 1.3.5. [Mechanism sensor information and Mechanism mode position] See 1.3.6. 4: * 5 EMG detail information <2> [Type of the cassette tape in use <1>] See 1.3.6. 5: * 6 EMG detail information <2> [Winding position of the cassette tape in use] See 1.3.6. 6: * 7 EMG detail information <2> [Type of the cassette tape in use <2> (Winding area)] See 1.3.7. 7: * 8 EMG detail information <3> [Previous deck operation mode] See 1.3.7. 8: * 9 EMG detail information <3> [The deck operation mode of the one before the last] See 1.3.7. 9: * 1 0 EMG detail information <3> [The deck operation mode of the one prior to one above]
Fig. 1-3-1a EMG display of 7segment LED display model
(1) Display the EMG history. (2) Transmit the code "36" from the Jig RCU. (3) Reset the EMG display.
1-4
1.3.3 Details of the OSD display in the EMG display mode During the EMG display, the OSD shows the data on the deck mode, etc. The details of the display contents are as follows. Notes: · The display is variable depending on the part No. of the System Control microcomputer (IC3001) built into the VCR. In the following, refer to the figure carrying the same two characters as the top two characters of the part number of your IC. · The sensor information in the OSD display contents is partially different from the mechanism sensor information in EMG detail information <1>. [For MN* only]
[For *HD only]
AA DD GGGG I I KKKK ROM No.
BB EE HHHH JJJJ LLLL
CC FF
MMMM
AA FF KK PP UU
BB GG LL QQ VV
CC HH MM RR WW
DD I I NN SS XX
EE JJ OO TT YY
AA : BB : CC : DD : EE : FF: GGGG: HHHH : I I: J J J J: KKKK: LLLL: MMMM :
Key code (JVC code) Deck operation mode (See EMG detail information <1>.) Mechanism operation mode (See EMG detail information <1>.) Sensor information (See sensor information details.) Capstan motor speed (Search, double speed) Tracking value Cassette tape type <2>, 16 bits. (See EMG detail information <2>.) Supply reel winding diameter data Capstan motor speed (FF/REW, double speed) Tape speed data, lower 8 bits. General data display area General data display area General data display area
AA BB CC DD EE FF GG HH I I JJ KK LL MM NN OO PP
: Deck operation mode (See EMG detail information <1>.) : Mechanism operation mode (See EMG detail of information <1>.) : Mechanism transition flag : Capstan motor control status : Loading motor control status : Sensor information (See sensor information details.) : Capstan motor speed : Key code (JVC code) : Supply reel winding diameter data, higher 8 bits. : Supply reel winding diameter data, lower 8 bits. : Mechanism sensor information & mechanism mode position (See EMG detail of information <1>.) : Tape speed data, higher 8 bits. : Tape speed data, lower 8 bits. : Cassette tape type <2>, higher 8 bits. (See EMG detail of information <2>.) : Cassette tape type <2>, lower 8 bits. (See EMG detail of information <2>.) : General data display area
*DD: Sensor information details ** h * * * * * * * *
Encoder data (See Mechanism mode sequence.) Remote pause End sensor Start sensor Cassette tab present = 1 Cassette tab broken = 0 [For both MN*/HD*] Mechanism mode sequence
Mechanism mode - Encoder data
1 2 3 4 5 6 7 8 9 10 11
Y Y : General data display area *FF: Sensor information details ** h * * * * * * * *
LSA LSB LSC LSD
Encoder output = Low or Trerminal - GND = SHORT Encoder output = High or Trerminal - GND = OPEN
No.
1 2 3 4 5 6 7 8 9 10 11 12
Cassette tab present = 1 Cassette tab broken = 0 Cassette absent = 1 Cassette present = 0 Start sensor End sensor
Position EJECT EJECT1 EJECT2 ULSTOP UPPER ONSTOP(PLAY) FWD/SS REV/SS OFFSTOP FFREW-BRAKE FFREW MIDDLE
Encoder data 0 h = 0000 1 h = 0001 2 h = 0010 3 h = 0011 4 h = 0100 5 h = 0101 6 h = 0110 7 h = 0111 8 h = 1000 9 h = 1001 A h = 1010 F h = 1111
LSD LSC LSB LSA GND
5 4 3 2 1
Encoder data (See Mechanism mode sequence.)
1-5
1.3.4
EMG content description
Note: EMG contents "E08/E09" are for the model with Dynamic Drum (DD).
FDP
E01: Loading EMG
CONTENT
If the mechanism mode does not change to the next mode within 4 seconds after the loading motor starts rotating in the loading direction, while the mechanism is in the after-loading position (with the tape up against the pole base), [E:01] is identified and the power is switched OFF. However, if the tape loading is not completed within 4 seconds after the loading motor starts rotating in the loading direction, the tape is simply unloaded and ejected. No EMG data is recorded in this case. When the mechanism mode cannot be changed to another mode even when the loading motor has rotated for more than 4 seconds in the unloading direction, [E:02] is identified and the power is turned off.
CAUSE
1. The mechanism is locked in the middle of the mode transition during a tape loading operation. 2. The mechanism overruns during the tape loading operation because the SYSCON cannot recognize the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure. 3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)
E02: Unloading EMG
1. The mechanism is locked in the middle of mode transition. 2. Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejection is attempted while the tape is still inside the mechanism.) because the SYSCON cannot recognize the mechanism mode normally. This is due to a cause such as a rotary encoder failure. (Mechanism position: UPPER) 3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.) 1. The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD SEARCH/FF, etc.) because; 1)The idler gear is not meshed with the take-up reel gear because the mechanism malfunctions for some reason. 2)The idler gear is meshed with the take-up reel gear, but incapable of winding due to too large mechanical load (abnormal tension); 3)The reel is rotating normally but an FG pulse is not generated due to the take-up reel sensor failure. 2. The supply reel pulse is not generated in the REV transport modes (REV SEARCH/ REW, etc.) because; 1) The idler gear is not meshed with the supply reel gear because the mechanism malfunctions for some reason. 2) The idler gear is meshed with the supply reel gear, but incapable of winding due to too large a mechanical load (abnormal tension); 3) The reel rotates normally but the FG pulse is not generated due to a supply reel sensor failure. 3. Power(SW5V) is not supplied to the reel sensor on the tape winding side. 1. The drum could not start or the drum rotation has stopped due to too large a load on the tape, because; 1) The tape tension is abnormally high; 2) The tape is damaged or a foreign object (grease, etc.) adheres to the tape. 2. The drum FG pulse did not reach the System controller CPU because; 1) The signal circuit is disconnected in the middle; 2) The FG pulse generator (hall device) of the drum is faulty. 3. The drum control voltage (DRUM CTL V) is not supplied to the MDA. 4. Power (M12V) is not supplied to the drum MDA. 1. The cassette cannot be ejected due to a failure in the drive mechanism of the housing. 2. When the housing load increases during ejection, the loading motor is stopped because of lack of headroom in its drive torque. Housing load increasing factors: Temperature environment (low temperature, etc.), mechanism wear or failure. 3. The sensor/switch for detecting the end of ejection are not functioning normally. 4. The loading motor drive voltage is lower than specified or power (M12V) is not supplied to the motor (MDA). 5. When the user attempted to eject a cassette, a foreign object (or perhaps the user's hand) was caught in the opening of the housing. 1. The capstan could not start or the capstan rotation has stopped due to too large a load on the tape, because; 1) The tape tension is abnormally high (mechanical lock); 2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occurrence of tape entangling, etc.). 2. The capstan FG pulse did not reach the System controller CPU because; 1) The signal circuit is disconnected in the middle; 2) The FG pulse generator (MR device) of the capstans is faulty. 3. The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA. 4. Power (M12V, SW5V) are not supplied to the capstan MDA. 1. The SW 5 V power supply circuit is shorted with GND. 2. The SW 12 V power supply circuit is shorted with GND. 1. The absolute value sensor is defective. (The soldered parts have separated.) 2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.) 3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value sensor. 4. The absolute value sensor data is not sent to the System Controller CPU. 1. 2. 3. 4. 5. 6. 7. 8. 9. The FG sensor is defective. (The soldered parts have separated.) The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.) Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor. The power (5V) to the sensor is not supplied. (Connection failure/soldering failure) The FG pulse is not sent to the System Controller CPU. The tilt motor is defective. (The soldered parts have separated.) The drive power to the tilt motor is not supplied. (Connection failure/soldering failure) The tilt motor drive MDA - IC is defective. Auto-recovery of the DD tilting cannot take place due to overrun.
E03: Take Up Reel Pulse EMG
When the falling edje of the take-up reel pulse has not been generated for more than 4 seconds in the capstan rotating mode, [E:03] is identified, the pinch rollers are turned off and stopped, and the power is turned off. In this case, however, the mechanism should be in position after tape loading. Note that the reel EMG is not detected during Slow/Frame advance operations.
E04: Drum FG EMG
When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode, [E:04] is identified, the pinch rollers are turned off and stopped, and the power is turned off.
E05: Cassette Eject EMG
If the cassette does not reach the eject position within about 0.7 seconds after the cassette housing has started the cassette ejection operation, [E:05] is identified, the drive direction is reversed to load the tape, the mode is switched to STOP mode with the pinch roller OFF, and the power is switched OFF. During the cassette insertion process, the drive direction is reversed and the cassette is ejected if the tape is not up against the pole base within about 3 seconds after the start of the cassette pullingin operation. If the cassette does not reach the eject position within about 0.7 seconds after the drive mode reversal operation, [E:05] is identified and the power is switched OFF immediately. When the capstan FG pulse has not been generated for more than 1 second in the capstan rotating mode, [E:06] is identified, the pinch rollers are turned off and stopped, and the power is turned off.However, the capstan EMG is not detected in SLOW/ STILL modes. Note that, if the part number of the System Control IC begins with "MN" or "M3", the capstan EMG is not detected even during the FF/REW operation.
E06: Capstan FG EMG
E07: SW Power Short-Circuit EMG
E08: DD Initialized (Absolute Position Sensor) EMG DD FG EMG
When short-circuiting of the SW power supply with GND has lasted for 0.5 second or more, [E:07] is identified, all the motors are stopped and the power is turned off. When DD tilting does not complete in 4 seconds, [E:08] is identified, the tilt motor is stopped and the power is turned off.
E09:
When the DD FG pulse is not generated within 2.5 seconds, [E:09] is identified, the tilt motor is stopped and the power is turned off.
E0A: Supply Reel Pulse EMG
When the falling edge of the supply reel pulse has not been generated for more than 10 seconds in the capstan rotating mode, [E:0A] is identified and the cassette is ejected (but the power is not turned off). In this case, however, the mechanism should be in the position after tape loading (with the tape up against the pole base). Also note that the reel EMG is not detected during Slow/ Frame advance operations.
1. The supply reel pulse is not generated in the FWD transport mode (PLAY/FWD SEARCH/FF, etc.) because; 1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cassette is cut in the middle; 2) A mechanical factor caused tape slack inside and outside the supply reel side of the cassette shell. In this case, the supply reel will not rotate until the tape slack is removed by the FWD transport, so the pulse is not generated until then; 3) The reel is rotating normally but the FG pulse is not generated due to a supply reel sensor failure. 2. The take-up reel pulse is not generated in the REV transport mode (REV SEARCH/ REW, etc.). 1) REV SEARCH/REW is started when the tape in the inserted cassette has been cut in the middle; 2) A mechanical factor caused tape slack inside and outside the take-up reel side of the cassette shell. In this case, the supply reel will not rotate until the tape slack is removed by the REV transport, so the pulse will not be generated until that time; 3) The reel is rotating normally but the FG pulse is not generated due to a take-up reel sensor failure. 3. The power (SW 5V) to a reel sensor is not supplied.
EU1: Head clog warning history
Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output channels (without regard to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:U1] is identified and recorded in the emergency history. During the period in which the head clog is detected, the FDP shows "U:01" and the OSD repeats the "3 seconds of warning display" and the "7 seconds of noise picture display" alternately. EMG code : "E:C1" or "E:U1" / FDP : "U:01" / OSD : "Try cleaning tape." or "Use cleaning cassette." The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode than PLAY.
1-6
Table 1-3-4a
1.3.5
EMG detail information <1>
The status (electrical operation mode) of the VCR and the status (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 : *2 : 3 : 4 : Deck operation mode at the moment of EMG Mechanism operation mode at the moment of EMG Mechanism sensor information at the moment of EMG Mechanism mode position at the moment of EMG
* 2 : Mechanism operation mode [Table of MN*]
Display 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 Mechanism operation mode Command standby (No command to be executed) Immediate Power OFF after EMG occurrence Loading from an intermediate position during mechanism initialization Unloading due to EMG occurrence during mechanism initialization Ejecting cassette (ULSTOP to EJECT) Inserting cassette (EJECT to ULSTOP) Loading tape (ULSTOP to PLAY) Unloading tape (PLAY to ULSTOP) Transition from pinch roller ON to STOP Transition from pinch roller OFF to STOP (PLAY to OFFSTOP) Transition from pinch roller OFF to STOP at power OFF Transition from pinch roller ON to STOP at power ON Transition to PLAY Transition to Search FF Transition to REC Transition to FWD STILL/SLOW Transition to REV STILL/SLOW Transition to Search REV Transition from FF/REW to STOP Transition to FF Transition to REW Tape end detection processing during loading Short FWD/REV at tape sensor ON during unloading Transition to FF/REW brake mode
Note: · For EMG detailed information <1>, the content of the code that is shown on the display (or OSD) differs depending on the parts number of the system control microprocessor (IC3001) of the VCR. The system control microprocessor parts number starts with two letters, refer these to the corresponding table. * 1 : Deck operation mode [Common table of MN* and HD]
Display MN* 00 01 02 03 04 0C 10 20 21 22 24 2C 40 42 44 4C 6C 84 85 8C 8D 8E AC AD CC CD EC ED HD* 00 01 04 0E 11 22 26 2E 43 47 4C 6E 84 85 8F AF CD EF Deck operation mode Mechanism being initialized STOP with pinch roller pressure off (or tape present with P.OFF) STOP with pinch roller pressure on POWER OFF as a result of EMG PLAY (Normal playback) REC Cassette ejected FF Tape fully loaded, START sensor ON, short FF Cassette identification FWD SEARCH before transition to FF (SP x7-speed) FWD SEARCH (variable speed) including x2-speed INSERT REC REW Cassette identification REV SEARCH before transition to REW (SP x7-speed) REV SEARCH (variable speed) AUDIO DUB INSERT REC (VIDEO + AUDIO) FWD STILL / SLOW REV STILL / SLOW REC PAUSE Back spacing Forward spacing (FWD transport mode with BEST function) INSERT REC PAUSE INSERT REC back spacing AUDIO DUB PAUSE AUDIO DUB back spacing INSERT REC (VIDEO + AUDIO) PAUSE INSERT REC (VIDEO + AUDIO) back spacing
[Table of HD*]
Display 00 01 02 04 05 0E 11 22 26 2E 43 47 4C 6E 84 85 8F AF C7 CD EF F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF Mechanism operation mode STOP with pinch roller pressure off STOP with pinch roller pressure on U/L STOP (or tape being loaded) PLAY (Normal playback) PLAY (x1-speed playback using JOG) REC Cassette ejected FF FWD SEARCH (variable speed) including x2-speed INSERT REC REW REV SEARCH AUDIO DUB INSERT REC (VIDEO + AUDIO) FWD STILL/SLOW REV STILL/SLOW REC PAUSE INSERT REC PAUSE REV SEARCH (x1-speed reverse playback using JOG) AUDIO DUB PAUSE INSERT REC (VIDEO + AUDIO) PAUSE Mechanism being initialized POWER OFF as a result of EMG Cassette being inserted Cassette being ejected Transition from STOP with pinch roller pressure on to STOP with pinch roller pressure off Transition from STOP with pinch roller pressure on to PLAY Transition from STOP with pinch roller pressure on to REC Cassette type detection SEARCH before FF/REW is being executed Tape being unloaded Transition from STOP with pinch roller pressure off to STOP with pinch roller pressure on Transition from STOP with pinch roller pressure off to FF/REW Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.) Transition from STOP with pinch roller pressure off to cassette type detection SEARCH Short REV being executed after END sensor on during unloading Tension loosening being executed after tape loading (STOP with pinch roller pressure on) Tape being unloaded
1-7
3 : Mechanism sensor information [Common table of MN* and HD*]
Mechanism sensor information Display REC safety SW 0123456789ABCDEFTab broken Tab broken Tab broken Tab broken Tab present Tab present Tab present Tab present Tab broken Tab broken Tab broken Tab broken Tab present Tab present Tab present Tab present Start sensor ON ON ON ON OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF End sensor ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF Mechansim position sensor ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF
* 5 : Cassette tape type <1>
Display 00 16 82 84 92 93 C3 D3 E1 E2 E9 F1 Cassette tape type <1> Cassette type not identified Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified Small reel, thick tape (T-120) identified/thin tape (T-140) identified Large reel (T-0 to T-60) identified Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified C cassette, thick tape (TC-10 to TC-20) identified Small reel, thick tape (T-0 to T-100) identified C cassette, thin tape (TC-30 to TC-40) identified C cassette, thick tape/thin tape (TC-10 to TC-40) not classified
Tab broken = 0 Tab present = 1
Sensor ON = 0 sensor OFF = 1
Sensor ON = 0 Sensor OFF = 1
Notes: · Cassette tape type <1> is identified a few times during mode transition and the identification count is variable depending on the cassette tape type. If an EMG occurs in the middle of identification, the cassette tape type may not be able to be identified. · If other value than those listed in the above table is displayed, the cassette tape type is not identified. * 6 : Cassette tape winding position The cassette tape winding position at the moment of EMG is displayed by dividing the entire tape (from the beginning to the end) in 21 sections using a hex number from "00" to "14". "00" "14" "FF" : End of winding : Beginning of winding : Tape position not identified
4 : Mechanism mode position [Common table of MN* and HD*]
Mechanism Dissensor play information Deck operation mode
Even number (0, 2, 4, 6, 8, A, C, E)
Odd number (1, 3, 5, 7, 9, B, D, F)
-0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -A -B -C -D -E -F -0 -1 -2 -3 -4 -5
Not established EJECT EJECT position EJECT-EJECT1 Intermodal position EJECT1 EJECT1 position EJECT1-EJECT2 Intermodal position EJECT2 EJECT2 position EJECT2-ULSTOP Intermodal position ULSTOP ULSTOP position ULSTOP-UPPER Intermodal position UPPER Loading (unloading) tape UPPER-ONSTOP Intermodal position ONSTOP PLAY position PLAY-FWD/SS Intermodal position FWD/SS FWD (FWD Still/Slow) position FWD/SS-REV Intermodal position REV REV (REV Still/Slow) position REV-OFFSTOP Intermodal position OFFSTOP Pinch roller OFF position OFFSTOP-FFREWB Intermodal position FFREWB FF/REW Brake position FFREWB-FFREW Intermodal position FFREW FF/REW position
* 7 : Cassette tape type <2> (Winding area)
Display 00 04 - 08 05 - 06 05 - 0C 06 - 0C 06 - 0C 07 - 08 09 - 0B 0C - 0D 0D - 0F 0E - 10 10 - 12 10 - 13 11 - 14 12 - 14 13 - 14 13 - 14 13 - 14 13 - 14 15 - 16 16 - 17 17 - 18 19 - 1B Cassette tape type <2> Cassette type not identified C cassette, thick tape TC-10 Small reel, thick tape T-20 C cassette, thick tape TC-20P C cassette, thin tape TC-40 C cassette, thin tape TC-30 Small reel, thick tape T-40 Small reel, thick tape T-60 Small reel, thick tape T-80(DF-160) Small reel, thick tape T-90(DF-180) Small reel, thick tape T-100 Small reel, thin tape T-140 Small reel, thick tape T-120(DF-240) Small reel, thick tape T-130 Small reel, thin tape T-160 Small reel, thin tape T-210(DF-420) Small reel, thin tape T-180(DF-360) Small reel, thin tape T-168 Small reel, thick tape DF-300 Large reel T-20 Large reel T-30 Large reel T-40 Large reel T-60 (Reference) Word data (Beginning) (End) (0497 - 0506) (0732 - 0858) (05A9 - 0661) (0599 - 05FF) (0AA1 - 0C07) (0623 - 063D) (0C41 - 0CC3) (0611 - 0638) (0C0C - 0CB2) (07CC - 08E5) (09FD - 0B78) (0C20 - 0DFC) (0D31 - 0F3E) (0E43 - 107F) (10E1 - 120C) (1073 - 1313) (1185 - 1429) (12D3 - 141F) (1373 - 14C3) (1357 - 14C0) (1395 - 14EE) (13A8 - 14CE) (1536 - 1618) (1647 - 175A) (1759 - 189C) (1989 - 1B2F)
1.3.6
EMG detail information <2>
The type of the cassette tape and the cassette tape winding position can be confirmed based on the figure in EMG detail information <2> . [FDP/OSD display] *5 : *6 *5 : *6 : *7 : : *7 Type of the cassette tape in use <1> Winding position of the cassette tape in use Type of the cassette tape in use <2> (Winding area)
Note: · The values of cassette tape type <2> in the above table are typical values with representative cassette tapes.
1.3.7 EMG detail information <3> Three deck operation modes preceding the deck operation mode in which the EMG occurs may be confirmed based on the figures in the EMG information detail <3>. For the contents of the displayed information, see the table "Deck operation mode" in section "1.3.5 EMG detail information <1>".
Note: · EMG detail information <2> is the reference information stored using the remaining tape detection function of the cassette tape. As a result, it may not identify cassette correctly when a special cassette tape is used or when the tape has variable thickness.
1-8
1.4 Service position This unit has been designed so that the Mechanism and Main board assemblies can be removed together from the chassis assembly. Before diagnosing or servicing the circuit boards, take out the major parts from the chassis assembly. 1.4.1 How to set the "Service position"
1.5
Jig RCU mode
This unit uses the following two modes for receiving remote control codes. 1) User RCU mode : Ordinary mode for use by the user. 2) Jig RCU mode : Mode for use in production and servicing. When using the Jig RCU, it is required to set the VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received). As both of the above two modes are stored in the EEPROM, it is required to set the VCR back to the User RCU mode each time that an adjustment is made or to check that the necessary operations have been completed. These modes can be set by the operations described below. 1.5.1 Setting the Jig RCU mode (1) Unplug the power cord plug from the power outlet. (2) Press and hold the "REC" and "PAUSE" buttons on the VCR simultaneously, while plugging the power cord plug into the power outlet. When the VCR is set to the Jig RCU mode, the symbols ( " : " ) in the time display of the FDP are turned off. 1.5.2 Setting the User RCU mode (1) Turn off the power. (2) Press the "REC" and "PAUSE" buttons of the VCR simultaneously. Alternatively, transmit the code "80" from the Jig RCU. 1.6 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 called the "Mechanism service mode". 1.6.1 How to set the "Mechanism service mode" (1) Set the VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received). (2) Transmit the code "E5" from the Jig RCU. (3) Release the lug of the Cassette holder and then slide the Cassette holder toward the direction where the Cassette holder is loaded by manually. (4) The cassette holder lowers and, when the loading has completed, the mechanism enters the desired mode. When the VCR is set to the Mechanism service mode, the symbols ("Timer") in the FDP (LED) are blinked. 1.6.2 How to exit from the "Mechanism service mode" (1) Unplug the power cord plug from the power outlet.
(1) Refer to the disassembly procedure and perform the disassembly of the major parts before removing the Mechanism assembly. (2) Remove the screws that fix the Mechanism assembly to the Chassis assembly. If any other screws are used to fix the boards, remove them also. (3) Remove the combined Mechanism and Main board assemblies. (4) If any other major parts are used, remove them also. (5) Connect the wires and connectors of the major parts that have been removed in steps (1) to (4). (Refer to Fig. 1-2-2d.) (6) Place the combined Mechanism, Main board and other board assemblies upside down. (7) Insert the power cord plug into the power outlet and then proceed with the diagnostics and servicing of the board assembly. Notes: · Before inserting the power cord plug into the power outlet, make sure that none of the electrical parts are able to short-circuit between the workbench and the board assembly. · For the disassembly procedure of the major parts and details of the precautions to be taken, see "1.2 Removing the major parts". · If there are wire connections from the Main board and Mechanism assemblies to the other major parts, be sure to remove them (including wires connected to the major parts) first before performing step (2). · When carrying out diagnosis and repair of the Main board assembly in the "Service position", be sure to ground both the Main board and Mechanism assemblies. If they are improperly grounded, there may be noise on the playback picture or FDP counter display may move even when the mechanism is kept in an inoperative status. · In order to diagnose the playback or recording of the cassette tape, set the Mechanism assembly to the required mode before placing it upside down. If the mechanism mode is changed (including ejection) while it is in an upside down position the tape inside may be damaged. · For some models, the mechanism and board assemblies are attached by connectors only. When carrying out a diagnosis or repair of the boards in the "Service position", make sure that the connectors are not disconnected.
Main board assembly
TP111 D.FF TP106 PB.FM TP4001 CTL.P CP4001
CP3001 TP2253 A.PB.FM
VR4028 SWITCHING POINT ADJ.
Fig. 1-4-1a 1-9
1.7 Maintenance and inspection 1.7.1 Cleaning Regular cleaning of the transport system parts is desirable but practically impossible. So make it a rule to carry out cleaning 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 disappear, resulting in possible tape damage. Note: · Absolutely avoid sweeping the upper drum vertically as this will cause damage to the video head. (1) When cleaning the upper drum (especially the video head), soak a piece of closely woven cloth with alcohol and while holding the cloth onto the upper drum by the fingers, turn the upper drum counterclockwise. (2) To clean the parts of the tape transport system other than the upper drum, use a piece of closely woven cloth or a cotton swab soaked with alcohol. (3) After cleaning, make sure that the cleaned parts are completely dry before using the cassette tape.
1.7.3 Suggested servicing schedule for main components The following table indicates the suggested period for such service measures as cleaning, lubrication and replacement. In practice, the indicated periods will vary widely according to environmental and usage conditions. However, the indicated components should be inspected when a set is brought for service and the maintenance work performed if necessary. Also note that rubber parts may deform in time, even if the set is not used.
Operation hours System Parts name Drum assembly A/C head Pinch roller arm assembly Tape transport Full erase head Tension arm assembly Capstan motor (Shaft) Guide arm assembly Capstan motor Capstan brake assembly Main brake assembly Belt (Capstan) Drive Loading motor Clutch unit X 1000H C,X C,X C C C C C 2000H X C,X C C C C C X X X X X X X X X
A/C head
Video heads
Worm gear Control plate
Fig. 1-7-1a 1.7.2 Lubrication With no need for periodical lubrication, you have only to lubricate new parts after replacement. If any oil or grease on contact parts is soiled, wipe it off and newly lubricate the parts. Note: · See the "mechanism assembly" diagram of the "parts list" for the lubricating or greasing spots, and for the types of oil or grease to be used.
Other
Rotary encoder
C : Cleaning X : Inspection or Replacement if necessary
1-10
SECTION 2 DISASSEMBLING/ASSEMBLING OF MECHANISM
1. Before disassembling/assembling 1.1 Notes This model's mechanism relates closely to the rotary encoder and system control circuit (the rotary encoder is meshed with the control cam). The system circuit detects the mechanism condition using the rotary encoder's phase (internal switch phase). Therefore, the parts such as the rotary encoder, control plate, locking gear and control cam need to be installed correctly in order for the mechanism to operate properly. (For the mechanism phase adjustment, refer to the installation of each part.) · For the disassembling procedure of the main parts of the main unit and notes, refer to the "Specific items for the product". · Before using a soldering iron, be sure to disconnect the power plug from the AC outlet. · Do not touch any of the adjustment points until a defect position is specified. · When plugging or unplugging the connector, be sure not to damage the wire. · Be sure the springs are hooked all the way around and in the correct direction. · When performing repairs, take care not to damage a catch, etc. 1.3 Setting the mechanism assembling mode The mechanism-assembling mode is provided with this mechanism. When disassembling and assembling, it is required to engage this mode. Set the mode by adopting the following procedures. (1) Remove the mechanism assembly using the disassembling procedure. (2) Turn gear (a) of the loading motor manually to set the mechanism assembly to the eject end mode. Make sure that the main deck is connected to the guide hole (a) of the drive lever and the seal (a) of the main deck is connected to the mark "E" of the control plate. This condition is called the mechanism-assembling mode.
Seal (a)
Guide hole (a)
"E" mark CONTROL PLATE
DRIVE LEVER
OK
(
NG not hooked all the way around
)
Fig. 1-1a
1.2 Mechanism operation check When the mechanism is operated without a cassette loaded, operate the mechanism in the mechanism service mode. (Refer to the specific service items for the product.)
LOADING MOTOR Gear (a)
Unloading
Loading
Fig. 1-3a
2-1
1.4 Layout of the main mechanism parts
T2 Pole base assy (take-up Side) T3 A/C head T4 Main brake assy (take-up side)
Full erase head T17
T5 T6
Pinch roller arm assy Lid guide
Pole base assy T1 (supply side)
T7 Guide arm assy
T8 Brake lever Tension arm assy T16 T9 Drive lever Tension arm base T15
Rec safety lever T14 T10 Reel disk (take-up side) T11 Ider gear 1/2
Reel disk T13 (supply side)
T12 Idler arm B15 Direct gear
Fig. 1-4a
Load gear assy (take-up side) B1
B2 Fixing plate
B3 Load gear assy (supply side)
Capstan motor B14
B4 Load gear
B5 Control plate Capstan brake B13
Press lever B12
B6 Tension arm lever Control cam B11
Belt B10
Loading motor assy B9
B8 Clutch unit assy
B7 Change lever
Fig. 1-4b
Side frame(L) L2
R1 Side frame(R)
Earth spring(1) L1
Fig. 1-4c 2-2
Fig. 1-4d
1.5 Disassembling procedure table This table shows the order of parts removal when replacing each part. For replacement, remove the parts in the order of 1 to 18 shown in the table and install the parts in the reverse order. The symbol number before each part name shows the number in the figure "Layout of the main mechanism parts". T and B on the right of each part name show the side from which the part should be removed (T: From the front of the mechanism, B: From the rear of the mechanism, T/B: From both sides).
Symbols and numbers
L1
Front(T)/Back(B) of mechanism Number of removal steps
-
-
L2
-
R1 T6 T12 T11 T4 T10 T16 T15 B12 B11 B13 B9 B10 B2 B4 B3 B1 B5 B8 B15
Removal parts
Symbols and numbers
Loading gear assy (S)
Loading gear assy (T)
Capstan brake assy
Loading motor assy
Tension arm base
Cassette holder
Earth spring (1)
Side frame (R)
Main brake (T)
Side frame (L)
Idler gear 1/2
Control plate
Reel disk (T)
Tension arm
Control cam
Fixing plate
Press lever
L1 2.1 Earth spring (1) 2.1 T frame op 2.1 Cassette holder 2.1 Drive arm
T T T T T T T T T T T T T T T T T T T B B
1 2 3 3 5 3 1 1 1 2 4 5 6 7 6 7 7 8 8 8 7 1 2 3 4 1 1 1 1 1 2 2 3 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 4 5 6 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 6 7 6 6 6 6 7 7 6 1 1 1 1 1 1 2 2 2 2 3 4
L2 2.1 Side frame (L) R1 2.1 Side frame (R) T3 2.2 A/C head T17 - FE head T7 2.3 Guide arm assy T6 2.3 Lid guide T12 2.4 Idler arm T11 2.4 Idler gear 1/2 T10 2.5 Reel disk (T) T16 2.5 T ension arm T13 2.5 Reel disk (S) T15 2.5 T ension arm base - T head -up - T lever -up
T/B 1
T5 2.3 Pinch roller arm assy T
T4 2.5 Main brake assy (T) T
T8 2.5 Brake lever T14 2.5 Rec safety lever B12 2.6 Press lever B11 2.6 Control cam
B13 2.6 Capstan brake assy B B9 2.6 Loading motor assy B B10 2.7 Belt B14 2.7 Capstan motor - Wire holder B2 2.7 Fixing plate B4 2.7 Load gear B
T/B 2 T/B 1 B B 1 2 3 4
Belt
(Reference items) Replacement parts
1 1 1 1 1 1 1 2 3 4 5 6 7 2 8 9 1 1 1 2 3 4 2 5 6 7 8 9 3 10 11 12 13 2 4 5 3 4 2 2 2 2 2 5 3 3 3 3 4 4
B3 2.7 Loading gear assy(S) B B1 2.7 Loading gear assy(T) B T1 T2 T9 - Pole base assy(S) - Pole base assy(T) - Load gear base - Drive lever
T/B 4 T/B 5 B B B B 5 6 2 3
B5 2.7 Control plate B8 2.8 Clutch unit B15 2.8 Direct gear B7 B6 - Change lever - T ension arm lever
T/B 10 1
T/B 6 T/B 14 1
Direct gear
Clutch unit
Load gear
Top frame
Drive arm
Lid guide
Idler arm
2-3
2. Replacement of the main mechanism parts 2.1 Cassette holder 2.1.1 Removal (1) Remove the screws (a) and (b). (2) Hold up the top frame, cassette holder assembly, drive arm assembly and side frames (L/R) all together and remove them by releasing the hooks (a) and (b).
Screw (a)
2.1.3 Disassembling (1) Release hook (a) to remove the earth spring (1) from the top frame. (2) Release the catches (a) and (b) and pull the top frame in the direction shown by the arrow (a) to remove it. (3) Pull out the side frame (R). (4) Pull out the cassette holder assembly and drive arm assembly from the side frame (L).
Hook (a)
Catch (a)
Catch (b)
Screw (b)
Hook (a) Hook (b)
EARTH SPRING(1) Arrow (a) TOP FRAME
Fig. 2-1a 2.1.2 Installation (phase adjustment) (1) Turn gear (a) of the loading motor assembly so that the main deck connects to the guide hole (a) of the drive lever. (2) Hook the main deck to hooks (a) and (b). (3) Place the projection of the drive lever to section (a) of the side frame (R) and install the cassette holder to the main deck. Make sure that the bosses of the side frame (L/R) connect with the holes (a) and (b) of the main deck. (4) Secure screws (a) and (b).
Screw (a) Screw (b)
SIDE FRAME(L) CASSETTE HOLDER Assembly DRIVE ARM Assembly
SIDE FRAME(R)
Fig. 2-1c 2.1.4 Assembling (installation and phase adjustment) (1) Turn gear (a) of the loading motor assembly so that the main deck connects to the guide hole (a) of the drive lever. (2) Place the projection of the drive lever on section (a) of the side frame (R) and install the side frame (R) to the main deck. (3) Secure screw (b). (4) Place section (b) of the drive arm on the gear of the side frame (R). Make sure that the pin of the door opener connects with section (c) of the drive arm. (5) Place the drive arm on section (d) of the side frame (L) and install the side frame (L) on the main deck. Be sure to connect the earth spring (1) to the side frame (L). (6) Secure screw (a). (7) Turn gear (a) of the loading motor assembly until the drive arm is vertical. (8) Place the slit of the side frame (L/R) at the foot of the cassette holder assembly and install the cassette holder. (9) Place the top frame on the position guide (a) of the side frame (L/R) and push it in the direction shown by the arrow (a) for installation. (10) Hook the earth spring (1) to the hook (a) of the top frame.
Hook (a) Hook (b) Section (a)
Hole (b) Hole (a) Guide hole (a) DRIVE LEVER Gear (a)
Fig. 2-1b 2-4
2.2 A/C head
Screw (b) SIDE FRAME(R)
2.2.1 Removal (1) Remove screws (a) and (b). (2) Remove the A/C head together with the head base. (3) Remove the screws (c), (d) and (e) to remove the spring (a) and the A/C head from the HEAD BASE.
Section (a) DRIVE LEVER
Screw (e) Screw (c) Screw (d)
Spring (a) Screw (a) Cassette Holder Assembly HEAD BASE
A/C HEAD Screw (b)
Screw (a)
Fig. 2-2a
Guide hole (a) Gear (a) Section (c)
2.2.2 Installation (initial setting)
Section (b)
To install the A/C head to the head base, secure the screws in the order of (c), (d) and (e). To make the adjustment easy, temporarily elevate the A/C head.
SIDE FRAME(R) DRIVE ARM(L)
DRIVE ARM(R) SIDE FRAME(L)
Section (d)
(Temporary height) 11mm
A/C HEAD HEAD BASE
Hook (a)
Position guide (a)
Fig. 2-2b
EARTH SPRING(1) TOP FRAME Arrow (a)
Fig. 2-1d 2-5
2.3 Guide arm, pinch roller arm 2.3.1 Removal (1) Remove the spring (a) from the hook (a) and detach the guide arm assembly. (2) Release the catch (a) to remove the lid guide. (3) Remove the spring (b) from the hook (b) and detach the pinch roller arm assembly.
2.4 Idler arm, idler gear 1/2 2.4.1 Removal (1) Release the catches (a) and (b) to detach the idler arm. (2) Detach the idler gear 1/2.
IDLER ARM
Catch (b)
Pinch roller arm assembly
Catch (a) Spring (b) PRESS LEVER Hook (b) LID GUIDE Catch (a) IDLER GEAR 1/2
IDLER ARM
IDLER GEAR 2 Guide arm assembly Hook (a) Spring (a) IDLER GEAR 1 LID GUIDE
Pinch roller arm assembly Guide arm assembly
Fig. 2-4a 2.5 Main brake (T), brake lever, tension arm, reel disk (S/T), Rec safety lever 2.5.1 Removal (1) Remove the spring (a). (Detach section (b) of the spring (a).) (2) Release the catch (a) to detach the main brake (T). (3) Release the catch (b) to detach the reel disk (T) and the spacer. (4) Lift up and turn section (b) of the brake lever counterclockwise to remove the brake lever. (5) Remove the spring (b) from the hook (a). (6) Release the catch (c) to detach the tension arm. (7) Release the catch (d) to detach the reel disk (S) and the spacer. (8) Remove the spring (c) from the hook (b). (9) Turn the t