Jvc GY DV550 U Schematic

Page 1

SECTION 4
CHARTS AND DIAGRAMS

I SCHEMATIC DIAGRAM NOTES

- Schematic safety precaution
A Parts are safety related parts.
When replacing them, be sure to use the specified parts.

- Voltage and waveform measurements
Voltage: Measured with digital voltmeter in DC range;
iris closed in REC mode.
Value in I I is indicated only in the case PB
voltage is different from that in REC mode.
Waveform: Gray scale illuminated at more than 4000 lux at
3200K lighting.
- Unit of value
Unless othen/vise specified
1) Resistance is in 9 (1/6 W)
2) Capacitance is in pF
3) Inductance is in pH

- Expression of wiring

As the following circuit diagram is divided to print on some
sheets, such an indication as the following is found in the case
the wiring extends over two or more divided sections.

1) Circuit diagram divided into two or more sections:

Number of
Board Board Name divided sections
Wm SE 1/2 ~ 2/2
WW DPR 1/4 - 4/4
Em SS/CP 1/2 ~ 2/2
Em AUDIO/LCD 1/2 - 2/2
WWI DV MAIN 1/727/7

2) Indication of wiring which extends to another section:

(Example)
This indication that wiring extends to
2/3" of the diagram.

I
% DSPiHD 2/3

I

Signal name

A)

In the above case, the end of the wiring is connected to
the DSPiHD" on the 2nd section of the diagram.

This indication that wiring extends to
B) DV I/O" section of the diagram.

t
4D FRP DV 1/0
1

Signal name

In the above case, the end of the wiring is connected to
the FRP on the DV I/O" section of the diagram.

- Wiring of connector

(Example)
I
CN11 '
To WW ISB
CN11
(P. 4-6)
L I

In the above example, CN11 is connected with CN11 on
WW ISB board.

- Signal flow on the diagram
The following allow marks indicate the specified signal paths
respectively.

» : Recording or EE signal path
IZ> : Playback signal ptah
D : Recording and Playback signal path

- Others

In regard of a board assembly whose circuit is composed of

multilayered board patterns such 4- or Gelayered patterns, board

patterns of the power supply lines and grounding lines are omit»

ted in this section.

Note: For detail of each electrical part, refer to Section 6
ELECTRICAL PARTS LIST by it symbol number.

I REPLACING SURFACE MOUNT "CHIP COMPONENTS

- Some resistors, shorting iumpers (0 resistance), ceramic
capacitors, transistors, and diodes are chip parts. These chip
parts cannot be reused after they are once removed.

- Chip resistors used in some circuits are of high precision
type having little error in resistance.
To demonstrate the full capacity of this set, place an order
for proper parts referring to the diagrams and parts lists in
the section 5.

- Soldering cautions:
1) Do not apply heat for more than 3 seconds.
2) Avoid using a rubbing stroke when soldering.
3) Discard removed chips; do not reuse them.
4) Supplementary cementing is not required.
5) Use care not to scratch or otherwise damage the chips.

I CHIP PARTS PIN ARRANGEMENT
[1] Digital transistors

DTC1 EDD DTA1 DUDE
@ @@ DTB1 EDD
® @®
a a
B E B E
(Top view) (Top view)

® Two digits show resistance of R1 in abbreviation.

43: 4.7 kg
14: 10 kg
24: 22 kg
44: 47 k0

® Roman letter show the resistive ratio between R1 and R2
in abbreviation.
E : R2/R1 = 1/1
Y : R2/R1 = 5/1
W : R2/R1 : 2/1
X : R2/R1 = 1/2
T : R2 is opened.

@ Symbol the shape of resistor in abbreviation.

[2] Chip transistors and chip F.E.T.s

23A EDDIE 28C EDDIE
sz EDDIE ZSD EDDIE
c c
H 1-1
U U I_I U
B E B E
(Top view) (Top view)
23K EDDIE ZSJ EDDIE
R R
I_I |_I I_I |_I
S D S D
(Top view) (Top view)
[3] Chip diodes
MA143A/MA742 MA142WA MA142A
I_I I_I I_I I_I I_I
(Top View) (Top View) (Top view)

Page 2

4.1 INDEX TO PAGES OF MAIN BOARDS AND CIRCUIT BOARD LOCATION

WE PS Em CAM THTJTG

4.1.1 Circuit board location mm REG

WE ROM
WT! SENSZ Tim DV MAIN

/mm SEN1
n1 ,, D"
mmsa
milse

mm ISR

mm :2 mm SWF
/flm DPR mm IF
WE SE

mE SWRB
mm swpe

Em SWRM mm SS/CP

mm CONNECT mm MIC
Em REMOTE mm BNC mm JOG
Left-hand side Rear Em swnu mm OPE mm AUDIO/LCD

Right-hand side

E? AD

Em TA4

ET 26P

EE CN
WW EAFitJ Wm PWR JUNC Em AV JUNK

WE BNC
AD frame left-hand side Bottom

Board Page of diagram Board Page 01 diagram

No. Board Name Block diagram Schematic diagram Circuit board No. Board Name Block diagram Rhemaiic diagram Circuit board

- OVERALL - 4-3 - mm BNC - 4-25 4-26 AD frame right-hand side

- OVERALL (DVC UNIT) - 442 - mm FL - - 4-26
m m PR a. MBA 466,67 452,53 4-54 mm SS/CP 447 4-19, 20 4-21
m m DCDC - 4-56 4-57 mm AUDIO/LCD 448 4.25, 26 4-27 to 30
m m ROM - 442 4.42 mm REG 4-64 +34 4455
m m CONN. - 4-55 4-57 mm MT - 422 4-23, 24 WW CONN
m m DV MAIN 466,67 443 to 49 4-50, 51 EE OPE - 4-37 4459
EE ISB EE SENi - 4-38 4-39
EE ISG 4-33 4-4 4-5 E SENSZ - 4-38 4-39
EE ISR EE REMOTE - 4-38 4-69
E E TG 4-63 4-6 4-7 EE AU JUNK - 4-36 4-69
E E CAM 4-44 4-8 4-9 E E XLR - 4-33 4-39
m E SE 446 4-16, 17 4.13 mm PWR JUNO - +37 4459
E E PS - 4-31 4-33 E E CONNECT - 4-38 4-39
E E IF2 - 4-62 4-33 E E EAR.J - 4-38 4-39
m E DPR 445 4.10 in 13 4-1415 Em CT - 4-40 441
m m JOG - 4-24 4-26 Em P.5EL - 4-40 441
m m IF 4-61 4-32 4-33 Em 26F - 4-40 441
m m SWRU 4-61 4-24 4-26 Em TA3 - 4-40 441
m m SWF 4-61 4-25 4-26 Em TA4 - 4-40 441
m m SWRM - 4-25 4-26 EE BNc - +40 441 Tim DCDC
m E SWRB - 4-25 4-26 EE CN - +40 441 0 2
m E SWPW - 4-25 4-26 Em AD - 4-40 441 W 1 PR 8 MDA
mm MIC - 4-25 4-26
Note: Oniy thesection marked thus are described in this service manuai. DVC unit

For those section that are not described, please refer to the service manual Of GY-DVSOOU/E NO. 60125.

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