JVC GR-DVM55U Diagram
SECTION 4
CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM
Safety precautions
The Components identified by the symbol are
critical for safety. For continued safety, replace safety
critical components only with manufacturer's recommended parts.
1. Units of components on the schematic diagram
Unless otherwise specified.
1) All resistance values are in ohm. 1/6 W, 1/8 W (refer to
parts list).
Chip resistors are 1/16 W.
K: KØ (1000Ø), M: MØ (1000KØ)
2) All capacitance values are in µF, (P: PF).
3) All inductance values are in µH, (m: mH).
4) All diodes are 1SS133, MA165 or 1N4148M (refer to parts
list).
2. Indications of control voltage
AUX : Active at high.
AUX or AUX(L) : Active at low.
3. Interpreting Connector indications
1
2
Removable connector
3
1
2
Wire soldered directly on board
3
1
Non-removable Board connector
2
3
4. Voltage measurement
1) Regulator (DC/DC CONV) circuits
REC : Colour bar signal.
PB : Alignment tape (Colour bar).
— : Unmeasurable or unnecessary to measure.
4) Indication on schematic diagram
Voltage Indications for REC and PB mode on the schematic diagram are as shown below.
REC mode
12 3
2.5
(5.0)
PB mode
1.8
PB and REC modes
(Voltage of PB and REC modes
are the same)
Note: If the voltages are not indicated on the schematic
diagram, refer to the voltage charts.
5. Signal path Symbols
The arrows indicate the signal path as follows.
NOTE : The arrow is DVC unique object.
Playback signal path
Playback and recording signal path
Recording signal path
(including E-E signal path)
Capstan servo path
Drum servo path
(Example)
R-Y
Playback R-Y signal path
Y
Recording Y signal path
CIRCUIT BOARD NOTES
1. Foil and Component sides
1) Foil side (B side) :
Parts on the foil side seen from foil face (pattern face)
are indicated.
2) Component side (A side) :
Parts on the component side seen from component face
(parts face) indicated.
2. Parts location guides
Parts location are indicated by guide scale on the circuit board.
REF No.
IC101 B C 6 A
(A : Component side)
D : Discrete component)
B : Foil side
C : Chip component
Note: For general information in service manual, please
refer to the Service Manual of GENERAL INFORMATION Edition 4 No. 82054D (January 1994).
LOCATION
IC
Category : IC
Horizontal “A” zone
Vertical “6” zone
S40889-01
1
2
4
Board to Board
3
6. Indication of the parts for adjustments
The parts for the adjustments are surrounded with the circle as
shown below.
Connected pattern on board
The arrows indicate signal path
7. Indication of the parts not mounted on the circuit board
“OPEN” is indicated by the parts not mounted on the circuit
board.
R216
OPEN
S40889-01
4-1 4-2
4.1 BOARD INTERCONNECTIONS [GR-DVM55U]
(
JUNCTION
(
)
Page 4-57
YTU94074-20
5
(
)
Page 4-70
OPEN
YTU94077-20
F Vcc
ZOOM 2
ZOOM 3
ZOOM 4
FOCUS 2
FOCUS 3
FOCUS 4
FOCUS 1
ZOOM 1
4
REG 4.8V
IR TALLY
(
)
Page 4-51
Page 4-48
YTU94074-24
YTU94077-24
(
W/B SENS
(
Page 4-69
(
Page 4-47
)
YTU94074-20
)
YTU94077-20
)
)
)
: The number of patch cordsNOTE
are indicated by interconnected.
TG/V.DRV
(
)
Page 4-33
TG/V.DRV
(
Page 4-65
(
Page 4-61
OPEN
LCD MODULE
YTU94074-16
YTU94077-16
)
MAIN
DECK OPE ASSY
(
)
Page 4-69
)
A/HP
SEL.
(
Page 4-63
)
IN MIC/R
AUDIO
(
)
Page 4-7
OP
DRIVER
(
Page 4-53
OPEN
)
TG/V.DRV
(
Page 4-39
)
3
CAM DSP
(
)
Page 4-27
MDA 3.0V
(
)
Page 4-49
2
MDA 3.0V
TREELLED
SREELLED
(
)
Page 4-21
YTU94074-16
YTU94077-16
(
Page 4-11
USBSENS
)
1
XI164SELXI164SEL
(
Page 4-19
(
Page 4-15
AU SIG/L
AU SIG/R
)
)
(
Page 4-23
)
(
Page 4-67
CN901
)
Page 4-55
(
A/HP
SEL.
(
)
Page 4-35
)
YTU94109-45
YTU94129A-45
MODULE
)
MONITOR
(
LCD
4-3 4-4
y10205001a rev0
HGFEDCBA
4.2 BOARD INTERCONNECTIONS [GR-DVM75U]
NOTE): The number of patch cords
are indicated by interconnected.
DECK OPE ASSY
(
)
Page 4-69
LCD MODULE
JUNCTION
(
)
Page 4-57
5
(
)
Page 4-70
YTU94074-20
YTU94077-20
4
IR TALLY
(
Page 4-70
)
YTU94074-7
YTU94077-7
REG 4.8V
(
Page 4-51
)
F Vcc
ZOOM 2
ZOOM 3
ZOOM 4
(
W/B SENS
(
Page 4-69
ZOOM 1
)
CN6501
)
STO SENS,W/B
(
Page 4-37,47
FOCUS 2
FOCUS 3
FOCUS 4
FOCUS 1
OP
DRIVER
(
)
Page 4-53
(
Page 4-59
)
(
Page 4-48
YTU94074-24
YTU94077-24
)
)
(
)
Page 4-65
YTU94074-16
YTU94077-16
)
YTU94074-20
YTU94077-20
YTU94074-12
YTU94077-12
OBCLP
TG/V.DRV
(
Page 4-33
TG/V.DRV
STO SENS
WB
)
A/HP
SEL.
(
Page 4-63
IN MIC/R
(
)
)
Page 4-61
MAIN
AUDIO
M32 DT-IN
(
(
)
Page 4-9
INV
HDCVF
Page 4-39
INV
3
(
)
(
Page 4-41
NC
Page 4-31
M32 DT OUT
OPEN
)
YTU94074-16
YTU94077-16
OPEN
CAM DSP
(
Page 4-29
MDA 3.0V
(
)
Page 4-49
2
MDA 3.0V
TREELLED
SREELLED
(
)
Page 4-21
)
OPEN
HDCVF
OPEN
(
Page 4-13
INV
USB DRV
(
Page 4-43
)
ANA IN
)
1
OPEN
TG/V.DRV
OPEN
AU SIG/R
AU STG/L
XI164SEL
(
Page 4-25
)
(
Page 4-67
FRP
CN901
(
)
Page 4-19
VPPD
D GAIN
XI164SEL
(
)
Page 4-17
A.HP
SEL
(
)
Page 4-35
)
YTU94109-45
YTU94129A-45
(
Page 4-45
)
Page 4-55
(
)
MODULE
)
MONITOR
(
LCD
y10197001a rev0
ABCD EFGH
4-5 4-6
4.3 SYSCON SCHEMATIC DIAGRAM [GR-DVM55U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
TO REG
TO PC IF
VF MAIN
SERVO
TO VF MAIN
,
,
MAIN(SYSCON
5
VCCNCVOUT
GND
TO VF MAIN
TO W/B
TO REG
4
TO PC IF
,
TO PC IF
VF MAIN
TO PC IF
,
TO CAM DSP
,
TG/V.DRV
VF MAIN
)
TO
SERVO
TO SERVO
VF MAIN
,
TO SERVO
OPEN
TO
SERVO
TO CAM DSP
TO VF MAIN
TO REG
UPD703039F1-A07
CJIG RST
TO REG
3
TO VF MAIN
TO V OUT
TO CAM DSP
TO CAM DSP
TO TG/V.DRV
TO VF MAIN
TO TG/V.DRV
TO VF MAIN
TO VF MAIN
TO REG
2
TO VF MAIN
TO VF MAIN
TO VF MAIN
1
,
TO VF MAIN
MAIN AUDIO
NO WEAR
4-7 4-8
y10206001a rev0
TO CAM DSP
HGFEDCBA
4.4 SYSCON SCHEMATIC DIAGRAM [GR-DVM75U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
TO REG
TO PC IF
VF MAIN
SERVO
TO VF MAIN
,
,
MAIN(SYSCON
5
VCCNCVOUT
GND
TO VF MAIN
TO W/B
TO REG
4
TO PC IF
,
TO PC IF
VF MAIN
TO PC IF
,
TO CAM DSP
,
TG/V.DRV
VF MAIN
,
TO ANA IN
CAM DSP
)
TO
SERVO
TO VF MAIN
SERVO
TO
SERVO
TO DSC
TO DSC,USB DRV,MP3
TO DSC
TO DSC
MP3
TO DSC
TO USB DRV
TO VF MAIN
TO DSC,MP3
TO DSC
TO
CAM DSP
DSC
TO VF MAIN
TO REG
,
,
UPD703039F1-A08
3
TO
ANA IN
TO VF MAIN
TO VF MAIN
TO
VOUT
TO VF MAIN
TO STO SENS
TO CAM DSP
TO CAM DSP
TO TG/V.DRV
TO VF MAIN
TO REG
TO TG/V.DRV
TO VF MAIN
2
TO VF MAIN
TO VF MAIN
1
,
TO VF MAIN
MAIN AUDIO
NO WEAR
y10198001a rev0
TO STO SENS
TO V OUT,VF MAIN
TO VF MAIN
TO
CAM DSP
ABCD EFGH
4-9 4-10
4.5 PC IF SCHEMATIC DIAGRAM [GR-DVM55U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
MAIN(PC IF
5
4
)
TO VF MAIN
3
TO SYSCON
2
1
TO VF MAIN
RB501V-40-X
NO WEAR
4-11 4-12
y30139001a rev0
HGFEDCBA
4.6 PC IF SCHEMATIC DIAGRAM [GR-DVM75U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
5
4
3
MAIN(PC IF
C1301
)
OPEN
2
1
TO SYSCON
TO VF MAIN
RB501V-40-X
NO WEAR
ABCD EFGH
4-13 4-14
y30128001a rev0
4.7 DVMAIN SCHEMATIC DIAGRAM [GR-DVM55U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
MAIN(DVMAIN
5
TO REG
)
TO
CAM DSP
4
TO TG/V.DRV
TO VF MAIN
TO SERVO
3
OPEN
TO SERVO
OPEN
2
TO
PRE/REC
TO VF MAIN
1
NO WEAR
4-15 4-16
y10220001a rev0
TO CAM DSP
HGFEDCBA
4.8 DVMAIN SCHEMATIC DIAGRAM [GR-DVM75U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
5
4
OPEN
TO CAM DSP
TO
DSC etc
TO REG
MAIN(DVMAIN
)
,
TO ANA IN
CAM DSP
TO CAM DSP
,
TO ANA IN
CAM DSP
TO CAM DSP
TO TG/V.DRV
TO VF MAIN
TO SERVO
3
2
TO
PRE/REC
TO VF MAIN
TO VF MAIN
1
NO WEAR
ABCD EFGH
4-17 4-18
y10200001a rev0
TO CAM DSP
4.9 SERVO SCHEMATIC DIAGRAM
TO
REG
MAIN(SERVO
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
)
TO
REG
5
TO CAM DSP
TO
DVMAIN
TO DVMAIN
PRE/REC
,
TO
VF MAIN
4
TO
VF MAIN
TO
PRE/REC
TO SYSCON
3
TO SYSCON
,
TO SYSCON
VF MAIN
TO SYSCON
TO SYSCON
TO SYSCON
2
TO
REG
TO
VF MAIN
TC7W66FU
TO TG/V.DRV
TO REG
TO
DVMAIN
TO
VF MAIN
1
NO WEAR
MODEL
GR-DVM55U YQ44886A
IC1401
GR-DVM75U YQ44887A
1
MODEL IC1402 R1443 R1444
GR-DVM55U NONE NONE
TC7W66FU
GR-DVM75U NONE 1k 1k
MODEL
GR-DVM55U
GR-DVM75U
ROMTYPE
FLASH
MASK
FLASH
MASK
IC1401
MN1030F04KYBJN
MN10316KJN
MN1030F04KYBJP
MN10316KJP
IC1403
R1410 R1411 R1412
SN75W53FU 330 47k 330
NONE
NONE NONE NONE
SN75W53FU 330 47k 330
NONE
NONE NONE NONE
y10199001a rev0
4-19 4-20
HGFEDCBA
4.10 PRE/REC SCHEMATIC DIAGRAM
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
5
TO
SERVO
TO VF MAIN
4
TO CAM DSP
TO HEAD
3
TO
DVMAIN
,
TO DVMAIN
VF MAIN
TO DVMAIN
2
1
ABCD EFGH
TO REG
NO WEAR
y20139001a rev0
4-21 4-22
4.11 V OUT SCHEMATIC DIAGRAM [GR-DVM55U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
5
TO REG
4
TO VF MAIN
3
TO CAM DSP
2
TO SYSCON
1
NO WEAR
4-23 4-24
y30140001a rev0
HGFEDCBA
4.12 V OUT SCHEMATIC DIAGRAM [GR-DVM75U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
5
TO REG
100
2SC4617/RS/-X
TO ANA IN
4
180p
TO ANA IN
3
120
120
68p
0.01
TO VF MAIN
1
TO ANA IN
1
TO VF MAIN
100k
180p
TO CAM DSP
2
110
110
68p
TO SYSCON
1
NO WEAR
ABCD EFGH
4-25 4-26
y30129001a rev0
4.13
CAM DSP SCHEMATIC DIAGRAM [GR-DVM55U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
TO TG/V.DRV
MAIN(CAM DSP
5
TO CCD
)
TO VF MAIN
TO DVMAIN
TO VF MAIN
4
TO PRE/REC
TO DVMAIN
TO PRE/REC
TO PRE/REC
3
TO VF MAIN
TO SYSCON
TOVOUT
TO REG
TO CAM DSP
2
TO SYSCON
TO CAM DSP
VF MAIN
TO
VF MAIN
,
1
NO WEAR
4-27 4-28
TO REG
y10207001a rev0
HGFEDCBA
4.14 CAM DSP SCHEMATIC DIAGRAM [GR-DVM75U]
TO TG/V.DRV
MAIN(CAM DSP
5
TO CCD
)
TO DVMAIN
TO VF MAIN
TO VF MAIN
TO SYSCON
VF MAIN
,
4
TO ANA IN
TO PRE/REC
TO DVMAIN
TO PRE/REC
TO STO SENS
3
TO VF MAIN
TO SYSCON
22
1.3k
1.3k
2
TO SYSCON
,
TO SERVO
VF MAIN
TO
VF MAIN
TO
ANA IN
OPEN
TO VF MAIN
TO DSC
1
TO DVMAIN
TO DSC
OPEN
NO WEAR
ABCD EFGH
4-29 4-30
y10201001a rev0
TO REG
4.15 ANA IN SCHEMATIC DIAGRAM [GR-DVM75U]
For the destination of each signal and further line connections that are cut off fromNOTES :
this diagram,refer to "4.1 BOARD INTERCONNECTIONS".
When ordering parts,be sure to order according to the Part Number indicated in the Parts List.
5
TO CAM DSP
4
3
TO V OUT
(
ANA IN
)
TO SYSCON
TO TG/V.DRV
TO CAM DSP
TO SYSCON,CAM DSP
2
TO CAM DSP
TO REG
TO DVMAIN
1
NO WEAR
4-31 4-32
y20130001a rev0
TO SYSCON,DVMAIN
TO DVMAIN
HGFEDCBA
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