JVC GR-DVM55U Service Manual Download Page 13

Page: 13 / 39

1-8

Fig. 1-4-1

BACK
LIGHT

MONITOR
BOARD
ASSY

MONITOR
COVER ASSY

LCD
MODULE

MONITOR CASE

: 0.098N·m (1.0kgf·cm)
: 0.069N·m (0.7kgf·cm)

NOTE

FPC ASSY

NOTE

MARING

INSIDE

NOTE

MAGNET

HINGE
COVER(U)

FPC ASSY

HINGE
COVER(L)

HINGE
ASSY

1.4 DISASSEMBLY OF

MONITOR ASSEMBLY

1.4.1

Monitor assembly/Hinge assembly

1. Remove the four screws (1-4). While opening the moni-

tor cover assembly as shown by the arrow, release the
two hooks (L

a, L

b) from engagement and remove

the monitor cover assembly.

2. Remove the parts out of the monitor case and unlock

the connector CN

a. While raising the hinge assem-

bly upwards, get the two hooks (L

c, L

d) disengaged

and disconnect the FPC by pulling it out. Then, remove
the hinge assembly.

Note

When removing the parts out of the monitor case
assembly, be very careful not to damage the FPC
and parts.

3. Disconnect FPC from the connector CN

b and then re-

move the MONITOR board assembly and backlight.

Note

Remove the MONITOR board assembly and
backlight together unless it is needed to separate
them from each other for part replacement, etc.,
because the two are soldered to each other.

4. Remove the LCD module.

1.4.2 Hinge assembly

1. Remove the two screws (5, 6). While releasing the two

hooks (L

f, L

g) from engagement, remove the hinge

cover (U).

Note

Be careful not to lose any part during the above-
mentioned process.

2. Draw the FPC assembly out of the hinge cover (L) and

then remove the FPC assembly from the hinge assem-
bly.

Note

When reassembling, wind the FPC assembly
around the hinge assembly by three turns and a
half.

Be careful not to break the FPC wire during the
work.

Summary of Contents for GR-DVM55U

Page 1: ...tandard Recording Playback format Video Digital component recording Audio PCM digital recording 32 kHz 4 channel 12 bit 48 kHz 2 channel 16 bit Cassette Mini DV cassette Tape speed SP 18 8 mm s LP 12 5 mm s Maximum recording time SP 80 min using 80 min cassette LP 120 min For Digital Still Camera GR DVM75 only Storage media SD Memroy Card MultiMediaCard Compression system Still image JPEG compatib...

Page 2: ...R DVM55U 4 15 4 8 DVMAIN SCHEMATIC DIAGRAM GR DVM75U 4 17 4 9 SERVO SCHEMATIC DIAGRAM 4 19 4 10 PRE REC SCHEMATIC DIAGRAM 4 21 4 11 V OUT SCHEMATIC DIAGRAM GR DVM55U 4 23 4 12 V OUT SCHEMATIC DIAGRAM GR DVM75U 4 25 4 13 CAM DSP SCHEMATIC DIAGRAM GR DVM55U 4 27 4 14 CAM DSP SCHEMATIC DIAGRAM GR DVM75U 4 29 4 15 ANA IN SCHEMATIC DIAGRAM GR DVM75U 4 31 4 16 TG V DRV SCHEMATIC DIAGRAM 4 33 4 17 REG SC...

Page 3: ...e specified for compli ance with recognized codes pertaining to X ray emission Consequently when servicing these products replace the cath ode 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 connector In ...

Page 4: ... between terminals and surrounding metallic parts See table 1 below 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 ...

Page 5: ......

Page 6: ...assembly parts 3 Indicates the number in the disassembly diagram 4 Indicates parts and points such as screws washers springs which must be removed during disassembly assembly Symbol Name Point S Screw L Lock Pawl Hook SD Soldering 夡 Others Connector Cover Bracket etc Example 2 S1 Remove the two screws S1 for removing the part 1 CN 1a Disconnect the connector 1a SD1 Unsolder at the point SD1 5 Prec...

Page 7: ...hanism tape transport system optical lens surface 1 3 DISASSEMBLY ASSEMBLY OF CABINET PARTS AND BOARD ASSEMBLY 1 3 1 Disassembly flow chart This flowchart indicates the disassembly step for the cabi net parts and board assembly in order to gain access to item s to be serviced When reassembling perform the step s in reverse order Table 1 2 1 Table 1 3 1 Torque Driver YTU94088 1 Bit YTU94088 003 2 3...

Page 8: ...ide switch at the position of the DSC switch VIDEO side GR DVM75U ONLY NOTE 0b When attaching take care with the wire treatment This note does not apply when the E VF Assembly and FPC have been removed together as shown in Fig 1 3 8 NOTE a When unplugging the connector d be careful with the handling of the FPC connected to it NOTE b Connector e is located inside the circuit board so it should be t...

Page 9: ...6 3 S b 7 3 S b 7 3 S d 11 3 S d 11 3 S b 8 3 S b 8 3 S c 9 3 S c 10 3 CN 0 118N m 1 2kgf cm 0 098N m 1 0kgf cm LOCK MONITOR S b 13 4 S d 15 4 S e 16 4 S c 14 4 NOTE a 4 NOTE c 4 NOTE b 4 CN c 4 CN b 4 CN a 4 CN d 4 S a 12 4 L 4 4 5 S e 17 4 CN 2 1 L 2 S 1 1 S 2 3 S 2 4 S 1 2 NOTE 2 a 2 CN a 1 L 1 Fig 1 3 1 ...

Page 10: ...1 5 Fig 1 3 5 Fig 1 3 4 5 4 S b 19 5 S a 18 5 NOTE 5 0 198N m 2 0kgf cm 6 S b 23 6 S b 23 6 S b 24 6 S b 21 6 NOTE a b 6 S b 24 6 S a 20 6 S b 22 6 NOTE c 6 CN a 6 CN c 6 CN b 6 CN e 6 CN d 6 TAPE ...

Page 11: ... 7 NOTE b 7 NOTE c 7 NOTE a 7 Fig 1 3 7 Fig 1 3 8 7 8 S 27 8 NOTE 8 0 147N m 1 5kgf cm CN803 AUDIO NOTE SWITCH FPC a 9 9 NOTE d 9 NOTE b 9 NOTE c 9 CN a 9 CN b 9 NOTE b 9 NOTE b 9 L 9 L 9 S 28 9 NOTE a 9 TOP VIEW 0 098N m 1 0kgf cm or ...

Page 12: ...CN d 11 CN a 12 NOTE c 11 NOTE b 11 NOTE e 11 12 NOTE a 11 S b 38 13 S a 34 12 S 33 11 L 13 L 12 SHIELD PLATE 11 CN c 11 CN e 11 CN a 11 CN b 11 CN d 11 10 L b 10 NOTE BRACKET TOP SWITCH SPACER a 10 NOTE b 10 S b 30 10 S b 32 10 S b 31 10 S a 29 10 L a 10 0 098N m 1 0kgf cm Fig 1 3 9 ...

Page 13: ...L5c L5d disengaged and disconnect the FPC by pulling it out Then remove the hinge assembly Note5a When removing the parts out of the monitor case assembly be very careful not to damage the FPC and parts 3 Disconnect FPC from the connector CN5b and then re move the MONITOR board assembly and backlight Note5b Remove the MONITOR board assembly and backlight together unless it is needed to separate th...

Page 14: ... but replace the CCD base as sembly in whole with a new one 1 5 3 How to install OP block assembly and CCD board assembly 1 Install the optical LPF with the space rubber fitted to its CCD side in the OP block assembly 2 Paying heed to the space rubber not to get it to come off the setting position install the CCD base assembly in place and fasten it together with the space rubber with the two scre...

Page 15: ...3 Remove the screw 1 first and then lever VF 4 Remove the three screws 2 4 and draw out the eye piece sub assembly Frame VF 5 Remove the screw 5 first and then LCD module holder LCD Note9d Pay heed to the FFC not to damage it during the removing work 6 Get the two hooks L9a L9b disengaged and then re move the holder LCD Note9e Carefully proceed with the above mentioned work not to damage any part ...

Page 16: ...s locked during mode shift 2 The mechanism is locked at the mechanism loading end because the encoder position is skipped during mechanism mode shift E03 TU SUP REEL FG In the case no REEL FG is produced for 4 sec onds or more in the capstan rotation mode af ter loading was complete the mechanism mode is shifted to STOP with the pinch roller set off This error is defined as E03 However no REEL EMG...

Page 17: ... screw Reference drawing Screw tightening torque Removing order of screw Place to stick screw Reference drawing Screw tightening torque Removing order of screw Place to stick screw Reference drawing Screw tightening torque Removing order of screw Place to stick screw Reference drawing Screw tightening torque 1 2 3 4 5 6 1 2 3 4 5 6 7 9 VF ASSY 7 OP BLOCK ASSY Fig 1 5 1 II VI VI 1 2 3 4 5 6 7 8 9 N...

Page 18: ...olumn shows the side which the objective part is mounted on T the upper side B the lower side 4 Symbols appearing in this column indicate drawing numbers Step Part Name Fig Point Note Remarks 5 This column indicates parts and points such as screws washers springs and others to be removed fitted for dis assembling reassembling the mechanism Besides such the parts this column occasionally indicates ...

Page 19: ... supplying the power through the coupler by removing the cover for jig use this extension con nector double for connecting the jig connector ca ble 10 Communication cable Connect the Communication cable between the PC ca ble and Jig connector cable when performing a PC ad justment 11 PC cable To be used to connect the VideoMovie and a personal computer with each other when a personal computer is u...

Page 20: ...Fig 2 3 3 Fig 2 3 4 Fig 2 3 5 Fig 2 3 6 Fig 2 3 7 Motor DC3V EJECT mode Back side of deck C IN mode EJECT mode STOP mode SHORT FF mode PLAY mode REV mode SUB CAM GEAR TOP VIEW BOTTOM VIEW Fig 2 3 8 2 3 2 Explanation of mechanism mode The mechanism mode of this model is classified into six modes as shown in Table 2 3 1 Each mechanism mode can be distinguished from others by the relative position of...

Page 21: ...E SUP LOADING SUB BRAKE T PINCH ROLLER BRAKE PAD ARM TENSION 0 0 0 EJECT C IN 30 31 7 33 70 74 04 77 SHORT FF STOP 169 2 160 176 REV 211 5 200 220 PLAY 280 3 265 291 5 43 1 45 6 47 4 46 8 49 5 51 5 122 5 129 5 134 7 156 6 148 1 162 9 44 6 47 2 49 1 49 2 52 0 54 1 161 7 155 5 147 0 250 5 265 0 275 6 SLIDE START SLIDE END ROTARY ENCODER 3 2 1 2 3 3 Mechanism timing chart ...

Page 22: ...art 1 Configuration 2 Procedures for disassembly A Mechanism assembly Main deck assembly Slide deck assembly Mechanism assembly Main deck assembly Slide deck assembly Cassette housing assembly Cassette housing assembly B C A B C 2a 5b 7a 8a 11e 7h Fig 2 4 1 Fig 2 4 2 ...

Page 23: ...1 S7a 7c Pad arm assembly T Fig 2 4 11 W7 L7b P7b 7d 7d Slide guide plate assembly T Fig 2 4 11 S7b 7c Adjustment 7e Collar T Fig 2 4 11 7a 7f Collar T Fig 2 4 11 7a 7g Sub brake assembly T Fig 2 4 11 W7 L7c P7c 7b 7h Control plate assembly T Fig 2 4 11 2 W7 L7d P7d 7b C Main deck assembly 8a Tension lever assembly T Fig 2 4 12 8c 8b Slide lever assembly T Fig 2 4 12 8b 8c Brake control lever asse...

Page 24: ... 3a 7c 2a 7b 7a 7d 7e 9c 3c 3b 7h 2b 9f 8a 10c 9e 5b 9d 5a 4c 4a 4b 11b 11a CMain deck assembly BSlide deck assembly 10e 3d 9a 2c 3e 9b 8c 7f 7g TOP VIEW BOTTOM VIEW 11e 11d 11c 8b 10b CMain deck assembly BSlide deck assembly 10a ...

Page 25: ... no deformation in the frame or no damage to the switches etc Note 1d After reassembling the com ponent parts check the mechanism operation in the PLAY mode For details of checking method refer to 2 6 1 as sembling slide deck assem bly and main deck assem bly STOP mode EJECT mode PLAY mode Note 2a When removing the reel disk assembly be careful not to break the brake pad which applies lateral pres...

Page 26: ...embly to the mechanism as the pad arm assembly is moved to the extent in the di rection of the arrow Note 4a When removing the cleaner arm assembly it is recom mended to remove the slant pole arm assembly together with it except the case of a single unit replacement because the hook L4a is hard to disengage Note 4b How to set the coil spring P4b 3 3a Tension arm assembly 3b Release guide assembly ...

Page 27: ...ther deforma tion nor damage observed in them Note 5d When removing the rail assembly check to see if the collar is securely set in the arm groove Note 6a When removing the slide deck assembly pay heed to the three components of the following because they are apt to come off after the slide deck assembly is removed 8a Tension lever assembly 8b Slide lever assembly 8c Brake control lever assembly F...

Page 28: ...For details of reassembling procedure refer to 2 6 1 Assembling slide deck assembly and main deck as sembly Note 7d The pad arm assembly controls the tension level of the tension arm assembly For adjustment of the tension arm assembly refer to 2 6 2 Locating tension pole Note 7e When reinstalling the load brake assembly slightly lift the slide deck assembly upwards because the lower part of the lo...

Page 29: ...rake control plate 10c Rotary encoder 10d Connect gear 10e Reel drive pulley assembly Note 10a When removing refitting parts pay careful attention to the flexible board and so on not to damage them Note 10b When reinstalling the main cam gear and the brake control plate first fit them together so that the protrusion on the brake control plate is set in the slot on the main cam gear as shown below ...

Page 30: ... S11 W11 23 S11 11d 11c 11b 11a Fig 2 4 15 11 11a Catcher T assembly 11b Capstan motor 11c Charge arm assembly 11d Sub cam gear 11e PWB holder Note 11 The following figure shows how to put the charge arm as sembly and sub cam gear assembly together 11d 11c ...

Page 31: ... W6 W7 P7c P4a P4b 20 S11 21 S11 7 S10 15 S9 16 S10 12 S9 22 S11 24 S11 5 S2a 4 S2a 6 S2b 11 S7b 10 S7a 23 S11 7 S4 8 S4 13 S9 Cassette housing assembly CMain deck assembly 1 S1 L1b L1d L1c L1a A BSlide deck assembly 3c 9b 9c 10e 10d 9e 10c 8a 9f 10b 10a 8b 11a 11b 4a 4b 9a 3e 8c 11d 11e 7g 7a 2a 7d 7h 2b 2c 3d 3b 3a 7c 7b 11c 4c 5a 9d 5b 7f 7e Note Classification Part No Symbol in drawing Grease ...

Page 32: ...gear Set the sub cam gear so that its locating hole meets the hole on the main deck assembly This state represents that the mechanism is in the EJECT mode which is the mechanism assembly mode Connect gear Note 2 Set the connect gear so that its locating hole meets the hole on the main deck assembly Note 1 Note 1 Since the connect gear 2 is tightly fixed to the main deck by caulking adjust its phas...

Page 33: ...to 2 3 2 Explanation of mechanism mode 3 Press the end face B of the slide deck assembly reel disk side and the end face C of the main deck assem bly drum assembly side with uniform force so that the two assemblies are tightly pressed to each other Further more press the part D and tighten the screw A Note Tightening torque for screw A 0 069 N m 0 7 kgf cm 3 2 3 3 1 3 3 C C D A B B œ Œ ...

Page 34: ...er the mechanism assembly into the PLAY mode Refer to 2 3 2 Explanation of mechanism mode 2 When the part is positioned down make sure that the part a of the tension arm assembly is located within the range of b 3 If the part a is out of the range turn the pin c to adjust the position ...

Page 35: ...e assembly W3b 1 Idler arm assembly W3a 1 Pinch roller arm assembly Guide arm assembly Cleaner arm assembly W4 1 P4a 1 P4b 1 Slant pole arm assembly S4 3 Drum assembly Guide roller S assembly W5a 3 W5b 1 Rail assembly 2a 2b 3a 3b 3c 3d 3e 2c 4b 5b 4a 5a 4c 2 7 SERVICE NOTE Use the following chart to manage mechanism parts that are removed for disassembling the mechanism Table 2 7 1a ...

Page 36: ... Tension lever assembly Slide lever assembly Brake control lever assembly Loading guide Timing belt Center gear assembly S9 2 Motor bracket assembly W9 1 Worm wheel S9 1 Gear holder Main cam gear Brake control plate S10 1 W10a 1 W6 1 Rotary encoder W10a 1 Connect gear W10b 1 Reel drive pulley assembly Catcher T assembly S11 2 Capstan motor W11 1 Charge arm assembly S11 1 Sub cam gear S11 2 PWB hol...

Page 37: ...ion connector double for connecting the jig connector cable NOTE Fig 2 8 2 Jig connector cable schematic diagram 20 1 AL_3VSYS 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 MAIN CN105 JIG BOARD PIN NO DJIG_SCK 10 19 DJIG_SPT CVF_G 9 18 MON_G JLIP_RX 8 17 JLIP_TX GND 7 16 HID1 PB_CLK 6 15 ENV_OUT MAIN_VCO 5 14 ATFI FS_PLL 4 13 I_MTR IF_TX 3 12 CJIG_RST DJIG_MOD 2 11 REG_3V VPPC AL_3VSYS DJIG_SPT...

Page 38: ...s are fragile carefully handle them in dis connecting and connecting 3 Shortcircuit between operation un it and DECK chassis 2 Required test equipment 1 Color TV monitor 2 Oscilloscope dual trace type observable 100 MHz or higher frequency Note It is recommended to use one observable 300 MHz or higher frequency 3 Digital voltmeter 4 Frequency counter with threshold level adjuster 5 Personal comput...

Page 39: ...nal computer with each other when a personal computer is used for adjustment 9 Service support system To be used for adjustment with a personal computer 10 Alignment tape To be used for check and adjustment of interchange ability of the mechanism 11 INF adjustment lens To be used for adjustment of the camera system 12 INF adjustment lens holder To be used together with the camera stand for operat ...

Search results

Summary of Contents for GR-DVM55U

Reviews:

Related manuals for GR-DVM55U

Brands by name

Popular brands

JVC GR-DVM55U, Service Manual

Search results

Summary of Contents for GR-DVM55U

Reviews:

Related manuals for GR-DVM55U

Brands by name

Popular brands