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HR-S6970AH,HR-S6970AJ
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SERVICE MANUAL
VIDEO CASSETTE RECORDER
12 2004 YD047
HR-S6970AA,HR-S6970AG, HR-S6970AH,HR-S6970AJ
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For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).
1 2 3 4 5
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
TABLE OF CONTENTS
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YD047 2004/12
SPECIFICATION
HR-S6970AA GENERAL Power requirement Rating Operating Power consumption Power on Power off Temperature Operating Storage Operating position Dimensions (WIHID) Weight Format Maximum recording time (SP) (LP) (EP) VIDEO/AUDIO Signal system Recording system Signal-to-noise ratio Horizontal resolution S-VHS VHS PAL/MESECAM VHS NTSC Frequency range Normal audio Hi-Fi audio Input/Output TUNER/TIMER TV channel storage capacity Tuning system Channel coverage Aerial output Memory backup time ACCESSORIES Provided accessories RF cable, S-Video cable, Infrared remote control RF cable, S-Video cable, Infrared remote control unit, "R6/UM-3" battery I 2 unit, "R6/UM-3" battery I 2, Conversion plug* * Not provided in certain areas. Specifications shown are for SP mode unless otherwise specified. E.& O.E. Design and specifications subject to change without notice. 1-2 (No.YD047) 99 positions (+AUX position) Frequency synthesized tuner VHF : (Low) 42 MHz - 175MHz, (High) 175 MHz - 470 MHz UHF : 470 MHz - 870 MHz UHF channels (Adjustable E28- E60) Approx. 10 minutes 70 Hz to 10,000 Hz 20 Hz to 20,000 Hz RCA connectors: (IN I 2, OUT I 1), S-Video connectors: (IN I 2, OUT I 1) 400 lines 250 lines 220 lines PAL-type colour signal and CCIR monochrome signal, 625 lines/50 fields NTSC colour and EIA monochrome signals, 525 lines/60 fields DA4 (Double Azimuth) head helical scan system 45 dB 240 min. with E-240 video cassette(PAL/MESECAM) 160 min. with T-160 video cassette(NTSC) 480 min. with E-240 video cassette(PAL/MESECAM) 720 min. with E-240 video cassette(PAL/MESECAM) 480 min. with T-160 video cassette(NTSC) 5pC to 40pC -20pC to 60pC Horizontal only 400 mm I 94 mm I 275 mm 3.1 kg S-VHS/VHS standard 18 W 20 W 3.5 W 18 W 20 W AC 110 V - 240 V, 50 Hz/60 Hz AC 90 V - 260 V, 50 Hz/60 Hz HR-S6970AH HR-S6970AG HR-S6970AJ
SECTION 1 PRECAUTION
1.1 SAFTY PRECAUTIONS 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. (12) Crimp type wire connectorIn such cases as when replacing the power transformer in sets where the connections between the power cord and power trans former 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. Connector part number :E03830-001 Required tool : Connector crimping tool of the proper type which will not damage insulated parts. Replacement procedure a) Remove the old connector by cutting the wires at a point close to the connector.Important : Do not reuse a connector (discard it). 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. 1.1.1 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. (2) Parts identified by the symbol and shaded ( ) parts are 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: Wires covered with PVC tubing Double insulated wires High voltage leads (5) Use specified insulating materials for hazardous live parts. Note especially: Insulation Tape PVC tubing Spacers Insulation sheets for transistors Barrier (6) When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.
cut close to connector
Fig.1-1-3 b) 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
Fig.1-1-4 c) Align the lengths of the wires to be connected. Insert the wires fully into the connector.
Metal sleeve Connector
Fig.1-1-1 (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.
Power cord
Fig.1-1-5 d) As shown in Fig.1-1-6, 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.
Crimping tool
Fig.1-1-6 e) Check the four points noted in Fig.1-1-7.
Not easily pulled free Crimped at approx. center of metal sleeve
Fig.1-1-2 (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.
Conductors extended Wire insulation recessed more than 4 mm
Fig.1-1-7 (No.YD047)1-3
1.1.2 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 Fig.1-1-11 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 Fig.1-1-11 below.
d d' Power cord primary wire
(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 Fig.1-1-9 and following Fig.1-1-12.
a b c
Externally exposed accessible part
Z V
A
Chassis
Fig.1-1-9 (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 Fig.1-1-10 and grounding specifications.
AC inlet Earth pin MIlli ohm meter Grounding Specifications Region USA & Canada Europe & Australia Grounding Impedance ( Z ) Z Z 0.1 ohm 0.5 ohm Exposed accessible part
Fig.1-1-8
Fig.1-1-10
AC Line Voltage 100 V 100 to 240 V 110 to 130 V 110 to 130 V 200 to 240 V Japan USA & Canada Europe & Australia 1M R Region Insulation Resistance (R) R 1 M /500 V DC R 12 M /500 V DC Dielectric Strength AC 1 kV 1 minute AC 1.5 kV 1 minute AC 1 kV 1 minute AC 3 kV 1 minute (Class ) AC 1.5 kV 1 minute (Class ) Clearance Distance (d), (d') d, d' 3 mm d, d' 4 mm d, d' 3.2 mm d 4 mm d' 8 m m (Power cord) d' 6 m m (Primary wire)
10 M /500 V DC
Fig.1-1-11
AC Line Voltage 100 V 110 to 130 V 110 to 130 V 220 to 240 V Region Japan USA & Canada
0.15 1.5 2
Load Z
1
Leakage Current (i) i i i i i i 1 mA rms 0.5 mA rms 0.7 mA peak 2 mA dc 0.7 mA peak 2 mA dc
a, b, c Exposed accessible parts Exposed accessible parts Antenna earth terminals Other terminals
Europe & Australia
50
Fig.1-1-12 NOTE : These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
1-4 (No.YD047)
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS
2.1 Different table of features
HR-S6970AA POWER PLUG CONVERSION PLUG BROADCASTING STANDARD RF OUT CH/RF OUT SYSTEM [INITIAL] VCR PLUS+ OSD LANGUAGES AS/NZS NOT USED B/G,D/K,I 28-60[36]G[H]KI G-CODE ENGLISH CEE <-<-28-60[36][G]HKI G-CODE/SHOWVIEW ENGLISH, CHINESE HR-S6970AG HR-S6970AH HK3PIN <-B/G,D/K,I,M 28-60[36][G]HKMI G-CODE <-HR-S6970AJ SASO PROVIDED <-<-G-CODE/SHOWVIEW <--
The following table indicates main different points between models HR-S6970AA,HR-S6970AG,HR-S6970AH and HR-S6970AJ.
NOTE: Mark <-- is same as left. 2.2 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. 2.2.1 How to set the "Service position" (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. 2-2a.) (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 "3.1 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.
TP2253 A.PB.FM TP4001 CTL.P TP111 D.FF TP106 PB.FM TP2254 A.REC
Main board assembly
Fig.2-2a
(No.YD047)1-5
2.3
Jig RCU mode
2.4
Mechanism service 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. Note: Confirm the RCU mode when exchanged parts. Since some SERVICE PARTS sets the VCR to the Jig RCU mode as initial setting. Therefore please set the VCR to the user RCU mode after replacing the EEPROM. Ë-»® ÎÝË ³±¼»
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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". 2.4.1 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 "43-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. 2.4.2 How to exit from the "Mechanism service mode" (1) Unplug the power cord plug from the power outlet. 2.5 Maintenance and inspection 2.5.1 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.
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2.3.1 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. 2.3.2 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 "43-80" from the Jig RCU.
A/C head
Video heads
Fig.2-5a 2.5.2 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.
1-6 (No.YD047)
2.5.3 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. System Parts name Drum assembly A/C head Tape transport Pinch roller arm assembly Full erase head Tension arm assembly Capstan motor (Shaft) Guide arm assembly Capstan motor Capstan brake assembly Main brake assembly Drive Belt (Capstan) Loading motor Clutch unit Worm gear Control plate Other Rotary encoder C : Cleaning X : Inspection or Replacement if necessary X Operation hours 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
(No.YD047)1-7
SECTION 3 DISASSEMBLY
3.1 Removing the major parts 3.1.1 How to read the procedure table 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 Bracket (1) (2) Fig. Point Note No. 3-1a 4(S1a),(S1b),3(L1a), 2(SD1a),(P1a),(W1a), CN1(WR1a), - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - 2(S1c) (3) (4) (5)
Door opener
Side frame(R)
Switch knob
Switch lever
Fig.3-1a < Note 3a > 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. < Note 3b > When reattaching the Mechanism assembly, secure the screws (S3a to S3b) in the order of a, b. < Note 3c > 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 assembling mode". [See "MECHANISM ASSEMBLY SERVICE MANUAL (No. 86700)".] When reattaching the Mechanism assembly to the Main board assembly, take care not to damage the sensors and switch on the Main board assembly. < Note 3d > When reattaching the Drum assembly, secure the screws (S3c to S3e) in the order of c, d, e.
(S3d) Mechanism assembly (S3c) (S3e) (S3d) (S3e)
(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 3.1.2 Disassembly procedure
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(S3c)
HOOK
Attach the Drum assembly appropriately, since the installation state of the Drum assembly influences the FM WAVEFORM LINEARITY greatly.
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< Note 2a > 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.
Fig.3-1b 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.
Shaft Motor Video heads
Fig.3-1c
1-8 (No.YD047)
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Fig.3-1d (No.YD047)1-9
SECTION 4 ADJUSTMENT
4.1 Before adjustment 4.1.4 Color (colour) bar signal,Color (colour) bar pattern ݱ´±«® ¾¿® -·¹²¿´ ÅÐßÔÃ
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4.1.1 Precaution The adjustments of this unit include the mechanism compatibility and electrical adjustments. During the performance of this work, be sure to observe the precautions for each type of adjustment. If there is a reference to a signal input method in the signal column of the adjustment chart, Ext. S-input means the Y/C separated video signal and Ext. input means the composite video signal input. Unless otherwise specified, all measuring points and adjustment parts are located on the Main board. 4.1.2 Required test equipments Color (colour) television or monitor Oscilloscope: wide-band, dual-trace, triggered delayed sweep Signal generator: RF / IF sweep / marker Signal generator: stairstep, color (colour) bar [NTSC] Recording tape Digit-key remote controller(provided) 4.1.3 Required adjustment tools : Used --- : Not used
Mechanism compatibility adjustment Roller driver Jig RCU Back tension cassette gauge Alignment tape(MHPE) Alignment tape(MHPE-L)
Roller driver PTU94002 Jig RCU PTU94023B Back tension cassette gauge PUJ48076-2
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4.1.5 Switch settings When adjusting this unit, set the VCR mode and switches as described below. 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). (See "section 2 SPECIFIC SERVICE INSTRUCTIONS".)
Jig RCU [Data transmitting method] Depress the " "( 3 ) button after the data code is set.
INITIAL MODE CUSTOM CODE 43: A CODE DATA CODE
Electrical adjustment
---------
Fig.4-1a Jig RCU [PTU94023B] Set the switches as shown below unless otherwise specified on the relevant adjustment chart. The switches that are not listed below can be set as desired. If the VCR is not equipped with the functions detailed below, setup is not required.
AUTO PICTURE/VIDEO CALIBRATION/ B.E.S.T./D.S.P.C. PICTURE CONTROL/SMART PICTURE VIDEO STABILIZER TBC Digital 3R VIDEO NAVIGATION/TAPE MANAGER BLUE BACK OFF NORMAL/NATURAL OFF ON ON OFF OFF
Alignment tape (SP, stairstep, PAL) MHPE
Alignment tape (LP, stairstep, PAL) MHPE-L
1-10 (No.YD047)
Þ´«»
λ¼
4.1.6 Manual tracking mode (Auto tracking ON/OFF) setting (1) In order to set to the manual tracking mode during tape playback, press the SP/EP(LP)button on the remote control unit. Each press of the button switches the auto tracking ON or OFF. When the manual tracking mode is set, the tracking is placed at the center position. (2) Press channel +/- to adjust the tracking manually.
4.2 Mechanism compatibility adjustment Notes: Although compatibility adjustment is very important, it is not necessary to perform this as part of the normal servicing work. It will be required when you have replaced the A/C head, drum assembly or any part of the tape transport system. To prevent damaging the alignment tape in the compatibility adjustment, prepare a cassette tape (for self-recording/playback), perform a test on it by transporting it and making sure that the tape is not bent by the tape transport mechanisms such as in the guide rollers.(See Fig.4-2b.) 4.2.1 Tension pole position Notes: This adjustment must be performed every time the tension band is replaced.
Signal Mode (A) Back tension cassette gauge [PUJ48076-2] (B1) PB (B2) Eject end Adjust pin [Mechansim assembly] 25 - 51 gfcm (2.45 - 5 x 10-3 Nm)
4.1.7 EVR Adjustment Some of the electrical adjustments require the adjustment performed by the EVR system. The main unit have EEPROMs for storing the EVR adjustment data and user setups. Notes: In the EVR adjustment mode, the value is varied with the channel buttons (+, -). The adjusted data is stored when the setting mode changes (from PB to STOP, when the tape speed is changed, etc.). Take care to identify the current mode of each adjustment item when making an adjustment. When changing the address setting in the EVR adjustment mode, use the Jig RCU or the remote controller having numeric keypad with which a numeric code can be directly input. The remote control code of the Jig RCU corresponds to each of the digit keys on the remote controller as follows.
Digit-key Code 0 20 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29
Adjustment part (F) Specified value (G)
As the counter indication and remaining tape indication are not displayed FDP during the EVR adjustment mode, check them on the TV monitor screen. When performing the EVR adjustment, confirm that the FDP indication is changed to the EVR mode, as shown below.
FDP
Fig.4-1b EVR mode
(1) Play back the back tension cassette gauge (A). (2) Check that the indicated value on the left side gauge is within the specified value (G). (3) If the indicated value is not within the specified value (G), perform the adjustment in a following procedure.(See Fig.4-2a.) a) Remove the top frame, cassette holder and side frames (L/R) all together. (Refer to the SERVICE MANUAL No.86700 [MECHANISM ASSEMBLY].) b) Rotate the loading motor gear to move the control plate so that the triangular stamping to the left of the Pstamping is aligned with the stamping (a) on the main deck. This positioning is mode (B1). c) Adjust by turning the adjustment pin so that the tip of the tension arm is aligned with the stamping (b) on the main deck. d) Rotate the reel disk (S) by about one turn clockwise and make sure that the round hole of the adjustment pin is located in the OK range. If it is outside this range, restart the adjustment from the beginning. After completion of the adjustment, rotate the loading gear motor to return it to the mode (B2) position.
TENSION ARM
Stamping(b) OK
CONTROL PLATE Stamping(a)
ADJUST PIN
NG
Fig.4-2a
(No.YD047)1-11
4.2.2 FM waveform linearity
Signal Mode Equipment Measuring point External trigger Adjustment part Specified value Adjustment tool (A1) (A2) (B) (C) (D) (E) (F) (G) (H) Alignment tape(SP, stairstep, PAL) [MHPE] Alignment tape(LP,stairstep,PAL) [MHPE-L] PB Oscilloscope TP106 (PB. FM) TP111 (D.FF) Guide roller [Mechanism assembly] Flat V.PB FM waveform Roller driver [PTU94002]
Proper waveform variation
Improper waveform variation Up Down
(1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe the V.PB FM waveform at the measuring point (D). (3) Set the VCR to the manual tracking mode. (4) Make sure that there is no significant level drop of the V.PB FM waveform caused by the tracking operation, with its generally parallel and linear variation ensured. Perform the following adjustments when required. (See Fig. 4-2c.) (5) Reduce the V.PB FM waveform by the tracking operation. If a drop in level is found on the left side, turn the guide roller of the pole base assembly (supply side) with the roller driver to make the V.PB FM waveform linear. If a drop in level is on the right side, likewise turn the guide roller of the pole base assembly (take-up side) with the roller driver to make it linear. (See Fig. 4-2c.) (6) Make sure that the V.PB FM waveform varies in parallel and linearly with the tracking operation again. When required, perform fine-adjustment of the guide roller of the pole base assembly (supply or take-up side). (7) Unload the cassette tape once, play back the alignment tape (A1) again and confirm the V.PB FM waveform. (8) After adjustment, confirm that the tape wrinkling does not occur at the roller upper or lower limits. (See Fig. 4-2b.) [Perform adjustment step (9) only for the models equipped with SP mode and EP (or LP) mode.] [Perform adjustment step (9) only for the models equipped with SP mode and EP (or LP) mode.] (9) Repeat steps (1) to (8) by using the alignment tape (A2).
Improper Proper
A
B
Roller driver
C
D
Guide roller (supply side)
Fig.4-2c 4.2.3 Height and tilt of the A/C head Note: Set a temporary level of the height of the A/C head in advance to make the adjustment easier after the A/C head has been replaced. (Refer to the SERVICE MANUAL No.86700 [MECHANISM ASSEMBLY].)
(A) (B) (C) (D1) (D2) External trigger (E) Adjustment part (F) Specified value (G) Signal Mode Equipment Measuring point Alignment tape(SP, stairstep, PAL) [MHPE] PB Oscilloscope TP106 (PB. FM) TP4001 (CTL. P) TP111 (D.FF) A/C head [Mechanism assembly] Maximum waveform
(a) GUIDE ROLLER
(b) GUIDE POLE
Fig.4-2b
(1) Play back the alignment tape (A). (2) Apply the external trigger signal to D.FF (E), to observe the AUDIO OUT waveform and Control pulse waveform at the measuring points (D1) and (D2) in the ALT mode. (3) Set the VCR to the manual tracking mode. (4) Adjust the AUDIO OUT waveform and Control pulse waveform by turning the screws (1), (2) and (3) little by little until both waveforms reach maximum. The screw (1) and (3) are for adjustment of tilt and the screw (2) for azimuth.
Head base (2) (1) AUDIO OUT CTL.P (3)
A/C head
Fig.4-2d
1-12 (No.YD047)
4.2.4 A/C head phase (X-value)
Signal Mode Equipment Measuring point External trigger Adjustment part Specified value Adjustment tool (A1) (A2) (B) (C) (D) (E) (F) (G) (H) Alignment tape(SP, stairstep, PAL) [MHPE] Alignment tape(LP,stairstep,PAL) [MHPE-L] PB Oscilloscope TP106 (PB. FM) TP111 (D.FF) A/C head base [Mechanism assembly] Flat V.PB FM waveform Roller driver [PTU94002]
4.3 Electrical adjustment Note: 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 referred to when servicing the electrical circuitry. In case of trouble with the electrical circuitry, always begin a service by identifying the defective points by using the measuring instruments as described in the following electrical adjustment procedures. After this, proceed to the repair, replacement and/or adjustment. If the required measuring instruments are not available in the field, do not change the adjustment parts (variable resistor, etc.) carelessly. 4.3.1 Servo circuit 4.3.1.1
Signal
(1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe the V.PB FM waveform at the measuring point (D). (3) Set the VCR to the manual tracking mode. (4) Loosen the screws (4) and (5), then set the Roller driver to the innermost projected part of the A/C head. (See Fig. 42e.) (5) Rotate the roller driver so that the A/C head comes closest to the capstan. From there, move the A/C head back gradually toward the drum until the point where the FM waveform is maximized for the second time, and then tighten the screws (4) and (5) temporarily. (6) Play an alignment tape (A2) and set to the manual-tracking mode. (7) Fine-adjust A/C head base position to maximize the FM waveform, and then tighten the screws (4) and (5) firmly. (8) Play alignment tapes (A1) and (A2) and confirm that the FM waveforms are maximized when the tracking is at the center position.
Switching point
Stairstep signal Alignment tape(LP,stairstep,PAL) [MHPE-L] PB Oscilloscope VIDEO OUT terminal (75 ohm terminated) TP106 (PB. FM) TP111 (D.FF) Jig RCU: Code 43-5A 7.5 ± 0.5H Jig RCU [PTU94023B]
(A1) (A2) Mode (B) Equipment (C) Measuring point (D) External trigger Adjustment part Specified value Adjustment tool (E) (F) (G) (H)
To the drum Toward the capstan
Roller driver Screw (4) Head base
Toward the drum A/C head Screw (5)
(1) Play back the signal (A1) of the alignment tape (A2). (2) Apply the external trigger signal to D.FF (E) to observe the VIDEO OUT waveform and V.PB FM waveform at the measuring points (D1) and (D2). (3) Set the VCR to the manual tracking mode. (4) Adjust tracking so that the V.PB FM waveform becomes maximum. (5) Set the VCR to the Auto adjust mode by transmitting the code (F) from the Jig RCU. When the VCR enters the stop mode, the adjustment is completed. (6) If the VCR enters the eject mode, repeat steps (1) to (5) again. (7) Play back the alignment tape (A2) again, confirm that the switching point is the specified value (G).
Trigger point Switching point V.sync
To the capstan
Fig.4-2e
Alignment tape [SP, stairstep] played with the SP head Alignment tape [EP(LP), stairstep] played with the EP(LP) head
V. rate
Fig.4-3a Switching point 4.3.1.2
Signal X-value adjustment point Drum side Control head position Capstan side Mode Measuring point Adjustment part Specified value Adjustment tool
Slow tracking preset
(A1) (A2) (A3) (B1) (B2) (D) (F) (G) (H) Ext. input Color (colour) bar signal [PAL] Color (colour) bar signal [NTSC] VHS SP VHS LP (or EP) TV-Monitor Jig RCU: Code 43-71or 43-72 minimum noise Jig RCU [PTU94023B]
Maximum
Fig.4-2f
(1) Record the signal (A2) in the mode (B1), and play back the recorded signal. (2) Set the VCR to the manual tracking mode. (3) Set the VCR to the FWD slow (+1/6x) mode. (No.YD047)1-13
(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) Repeat steps (1) to (7) in the mode (B2). (9) Record the signal (A3) in the mode (B1), and play back the recorded signal. (10) Repeat steps (2) to (8). Note: For FWD slow (+1/6x) playback, transmit the code 4308 from the Jig RCU to enter the slow playback mode, and transmit the code 43-D0for REV slow (-1/6x) mode. 4.3.2 Video circuit 4.3.2.1
Signal
Y level
H. rate
Fig.4-3b EE Y/PB Y lebel 4.3.3 Syscon circuit Notes: When perform this adjustment, remove the Mechanism assembly. 4.3.3.1 Timer clock
No signal EE Frequency counter IC3001 pin 44 IC3001 pin 103 C3054 + and C3025 (TIMER CLOCK) 1024.008 ± 0.001 Hz (976.5549 ± 0.0010 usec) Signal Mode Equipment Measuring point (A1) (B) (C) (D1) (D2) (D3) Adjustment part (F) Specified value (G)
EE Y/PB Y level
Ext. S-input Ext. input Color (colour) bar signal [PAL] Color (colour) bar signal [NTSC] EE SP S-VHS SP VHS SP Oscilloscope Y OUT terminal (75 ohm terminated) Jig code 43-57 A : 11 Jig code 43-21 twice Jig code 43-18 or 43-19 (Channel +/-) 1.00 ± 0.05 Vp-p Jig RCU [PTU94023B]
(A1) (A2) (A3) (A4) Mode (B1) (B2) (B3) Equipment (C) Measuring point (D) EVR mode (F1) EVR address (F2) (F3) (F4) Specified value (G) Adjustment tool (H)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17)
Input the signal (A3) from the input point (A1). Set the VCR to the mode (B1). Observe the Y OUT waveform at the measuring point (D). Set the VCR to the EVR mode by transmitting the code (F1) from the Jig RCU. Set the EVR address to (F2) by transmitting the code (F3) from the Jig RCU. Transmit the code (F4) from the Jig RCU to adjust so that the Y level of the Y OUT waveform becomes the specified value (G). Release the EVR mode of the VCR by transmitting the code (F1) from the Jig RCU again. (When the EVR mode is released, the adjusted data is memorized.) Input the signal (A3) from the input point (A2). Repeat steps (3) to (7) in the mode (B1). Record the signal (A3) in the mode (B2), and play back the recorded signal. Set the VCR to the manual tracking mode. Repeat steps (3) to (7) in the mode (B2). Record the signal (A3) in the mode (B3), and play back the recorded signal. Set the VCR to the manual tracking mode. Repeat steps (3) to (7) in the mode (B3). Input the signal (A4) from the input point (A1). Repeat steps (2) to (15).
(1) Connect the frequency counter to the measuring point (D1). (2) Connect the short wire between the short point (D2) and Vcc (5V). (3) Short the leads of capacitor (D3) once in order to reset the microprocessor of the Syscon. (4) Disconnect the short wire between the short point (D2) and Vcc then connect it again. (5) Adjust the Adjustment part (F) so that the output frequency becomes the specified value (G).
1-14 (No.YD047)
SECTION 5 TROUBLESHOOTING
5.1 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. (See Fig. 5-1a) (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. (See Fig.5-1b ) 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 dis-engaging the hooks (a) and (b).
Screw(a) Cassette tape Cassette holder Top frame Side frame(R) Screw(a)
Fig.5-1a
Tension arm assembly Pole base assembly Pinch roller arm assembly
Hook(a) Side frame(L) Hook(b)
Fig.5-1c (6) Take up the slack of the tape into the cassette. This completes removal of the cassette tape.
Spring(a)
Direction of unloading
Fig.5-1b
(No.YD047)1-15
5.2 Emergency display 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] *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 5.2.4
See 5.2.5 See 5.2.6 See 5.2.7
INITIAL MODE CUSTOM CODE 43: A CODE DATA CODE
EMG display of FDP display model Fig.5-2c < Reference > EMG display of FDP display mode (1) Transmit the code "43-59" from the Jig RCU. The FDP shows the EMG content in the form of "E:**":.
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Fig.5-2a Jig RCU [PTU94023B] 5.2.1 Displaying the EMG information The EMG detail of information can be displayed by transmitting the code "43-59" 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 5.2.4 See 5.2.4
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(2) Transmit the code "43-59" 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 "43-59" 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 "43-59" 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 "43-59" from the Jig RCU once again to reset the display. 5.2.2 (1) (2) (3) Clearing the EMG history Display the EMG history. Transmit the code "43-36" from the Jig RCU. Reset the EMG display.
EMG detail information <1> See 5.2.5 [Deck operation mode] See 5.2.5 2: * 2 EMG detail information <1> [Mechanism operation mode] See 5.2.5 3: 34 EMG detail information <1> [Mechanism sensor information and Mechanism mode position] 4: * 5 EMG detail information <2> See 5.2.6 [Type of the cassette tape in use <1>] 5: * 6 EMG detail information <2> See 5.2.6 [Winding position of the cassette tape in use] 6: * 7 EMG detail information <2> See 5.2.6 [Type of the cassette tape in use <2> (Winding area)] 7: * 8 EMG detail information <3> See 5.2.7 [Previous deck operation mode] 8: * 9 EMG detail information <3> See 5.2.7 [The deck operation mode of the one before the last] 9: * 10 EMG detail information <3> See 5.2.7 [The deck operation mode of the one prior to one above]
EMG display of 7segment LED display model Fig.5-2b
1-16 (No.YD047)
5.2.3 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 : Deck operation mode (See EMG detail information < 1 >.) BB : Mechanism operation mode (See EMG detail of information < 1 >.) CC : Mechanism transition flag DD : Capstan motor control status EE : Loading motor control status FF : Sensor information (See sensor information details.) GG : Capstan motor speed HH : Key code (JVC code) I I : Supply reel winding diameter data, higher 8 bits. JJ : Supply reel winding diameter data, lower 8 bits. KK : Mechanism sensor information & mechanism mode position(See EMG detail of information < 1 >.) LL : Tape speed data, higher 8 bits. MM : Tape speed data, lower 8 bits. NN : Cassette tape type < 2 >, higher 8 bits. (See EMG detail of information < 2 >.) OO : Cassette tape type < 2 >, lower 8 bits. (See EMG detail of information < 2 >.) PP : General data display area YY : General data display area *FF:Sensor information details ** h * * * * * * * *
: Key code (JVC code) : Deck operation mode(See EMG detail information < 1 >.) : Mechanism operation mode (See EMG detail information < 1 >.) DD : Sensor information (See sensor information details.) EE : Capstan motor speed (Search, double speed) FF : Tracking value GGGG : Cassette tape type < 2 >, 16 bits. (See EMG detail information < 2 >.) HHHH : Supply reel winding diameter data II : Capstan motor speed (FF/REW, double speed) JJJJ : Tape speed data, lower 8 bits. KKKK : General data display area LLLL : General data display area MMMM : General data display area *DD:Sensor information details ** h * * * * * * * *
AA BB CC
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
LSA LSB LSC LSD
Encoder data (See Mechanism mode sequence.) Cassette tab present = 1 Cassette tab broken = 0 Cassette absent = 1 Cassette present = 0 Start sensor End sensor
No.
1 2 3 4 5 6 7 8 9 10 11 12
Encoder output = Low or Trerminal - GND = SHORT
Encoder output = High or Trerminal - GND = OPEN
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
5 4 3 2 1
(No.YD047)1-17
5.2.4 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 E09: 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.
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 take up 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.
1-18 (No.YD047)
5.2.5 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 : 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 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 (SPx7-speed) FWD SEARCH (variable speed) including x2-speed INSERT REC REW Cassette identification REV SEARCH before transition to REW (SPx7-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
*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
[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
(No.YD047)1-19
3- : Mechanism sensor information
[Common table of MN* and HD*]
Mechanism sensor information Display 0123456789ABCDEFREC safety SW Tab 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
-4 : Mechanism mode position
[Common table of MN* and HD*]
Mechanism sensor information Display Deck operation mode
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". 0 : End of winding 14 : Beginning of winding FF : Tape position not identified *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 -