JVC GC-QX3U Schematics
SECTION 3
CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM
Safety precautions
The Components identified by the symbol are
critical for safety. For continued safety, replace saf ety
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: KΩ (1000Ω), M: MΩ (1000KΩ)
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
4. Voltage measurement
1) Video circuits
V oltage are DC-measured (reference to ground) with a v oltmeter by suppling the color bar signal during print screen
mode.
— : Unmeasurable or unnecessary to measure
2) Indication on schematic diagram
V oltage indications on the schematic diagram are as shown
below.
123
2.5 1.8
Note: If the voltages are not indicated on the schematic
diagram, refer to the voltage charts.
5. Waveform measurement
1) Video circuits
Wav eforms are measured (reference to ground) with a color
bar signal during print screen mode.
2) Indication on schematic diagram
Waveform indications on the schematic diagram are as
shown below.
Measurement point
24
22201816
1
2
Wire soldered directly on board
3
1
Non-removable Board connector
2
3
1
2
4
Board to Board
3
C329
C330
0.1/50
R344
47K
R343
18K
0.1/50
C331
11/10
R345
10K
3) Waveform indications
Waveform number
WF25
WF25
R346
15K
ALC OUT
Waveform number
Waveform name or
measurement point
Connected pattern on board
The arrows indicate signal path
1.2 Vp-p
50 mV/2 msec/DIV
Oscilloscope Volts and Time/Division, Probe 10 : 1
Level : 1.2 Vp-p
3-1
6. Signal path Symbols
The arrows indicate the signal path as follows.
Memory screen main signal path
Memory screen and E-E signal path
E-E main signal path
(Example)
R-Y
Memory screen R-Y signal path
Y
E-E 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.
7. Indication of the parts for adjustments
The parts for the adjustments are surrounded with the circle as
shown below.
8. Indication of the parts not mounted on the circuit board
“OPEN” is indicated by the parts not mounted on the circuit
board.
R216
OPEN
(A : Component side)
(D : Discrete component)
B : Foil side
C : Chip component
REF No. LOCATION
IC
IC101 B C 6A
Category: IC
Horizontal “A” zone
Vertical “6” zone
Note:
For general information in service manual, please refer
to the Service Manual of GENERAL INFORMA TION Edition 4 No. 82054D (January 1994).
3-2
3.1 BOARD INTERCONNECTION
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
3-3 3-4
3.2 MAIN (SYSCON) SCHEMATIC DIAGRAM
TO
ARM ROM
(page 3-13)
TO
CDS AGC A/D
(page 3-13)
FROM
DSP97
(page 3-10)
TO/FROM
STROBE
CONTROL
(page 3-14)
TO
DSP97
(page 3-9)
TO
SD SUB
(page 3-11)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
TO
CDS AGC A/D
(page 3-13)
TO
DSP97
(page 3-9)
TO/FROM
DSP96
(page3-8)
TO/FROM
F/Z MDA
(page 3-12)
TO/FROM
IRIS
(page 3-12)
TO
DSP96
(page 3-8)
TO
DSP97
(page 3-10)
TO
ARM ROM
(page 3-13)
DSP97
(page 3-9)
DSP96
(page 3-9)
FROM
DSP96
(page 3-8)
TO/FROM
DSP96/DSP97/ARM ROM
(page 3-8,9,13)
FROM
G/A 148
(page 3-11)
TO DSP97
(page 3-10)
TO STROBE CONTROL
(page 3-14)
TO DSP96
(page 3-14)
TO IRIS
(page 3-14)
FROM
DSP97
(page 3-9)
TO
DSP96
(page 3-8)
TO
CAMERA
OPERATION
UNIT
3-5 3-6
FROM
DC/DC
(page 3-18)
3.3 MAIN (DSP96) SCHEMATIC DIAGRAM
TO
DSP97
(page 3-9)
TO
CDS AGC A/D
(page 3-13)
TO IRIS
(page 3-12)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
TO/FROM
MONI REG
TO/FROM
G/A JCY0148
(page 3-15)
TO/FROM
SYSCON
(page 3-6)
TO/FROM
DSP97
(page 3-10)
(page 3-16)
FROM
G/A JCY0148
(page 3-13)
TO
DSP97
(page 3-10)
FROM
SYSCOM
(page 3-5)
TO/FROM
DSP97
(page 3-9)
TO/FROM
CDS AGC A/D
(page 3-13)
TO/FROM
DSP97
(page 3-9)
TO/FROM
SD SUB
(page 3-11)
TO/FROM
G/A JCY0148
(page 3-11)
FROM
G/A JCY0148
(page 3-15)
TO
LCD
FROM
SYSCON
(page 3-5)
FROM
DSP97
(page 3-9)
TO
SYSCON
(page 3-5)
3-7 3-8
TO/FROM
DSP97
(page 3-10)
TO
CDS AGC A/D
(page 3-13)
3.4 MAIN (DSP97) SCHEMATIC DIAGRAM
FROM
DSP96
(page 3-8)
FROM
SYSCON
(page 3-6)
FROM
DSP96
(page 3-8)
TO/FROM JACK (VIDEO OUT/USB/PRINT/DC JACK)
(page 3-19)
FROM
SYSCON
(page 3-6)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
FROM
DSP96
(page 3-7)
FROM
SYSCON
(page 3-5)
FROM
DSP96
(page 3-8)
TO/FROM
SYSCON
(page 3-5,6)
FROM
G/A JCY0148
(page 3-11)
FROM
DSP96
(page 3-7)
FROM
DSP96
(page 3-7)
TO/FROM
CDS AGC A/D
(page 3-13)
TO/FROM
SYSCON
(page 3-5)
FROM
SYSCON
(page 3-5)
3-9 3-10
FROM
DSP96 (page 3-8)
3.5 MAIN (G/A JCY0148) AND MAIN (SD SUB) SCHEMATIC DIAGRAM
3.6 MAIN (F/Z MDA) AND MAIN (IRIS) SCHEMATIC DIAGRAMS
FROM
DSP96
(page 3-8)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
FROM
DSP96
(page 3-8)
FROM
DSP96
(page 3-8)
FROM
DSP96
(page 3-8)
TO
SYSCON
(page 3-4)
TO/FROM
IRIS
(page 3-12)
TO
SYSCON
(page 3-4)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
TO
OP UNIT
FROM
SYSCON
(page 3-6)
FROM
DSP96
(page 3-8)
FROM
DSP96
(page 3-8)
FROM
DSP96
(page 3-8)
FROM
DSP96
(page 3-8)
FROM
SYSCON
(page 3-6)
FROM
DSP96
(page 3-7)
TO
CCD UNIT
TO/FROM
F/Z MDA
(page 3-12)
FROM
SYSCON
(page 3-6)
3-11 3-12
3.7 MAIN (CDS AGC A/D AND ARM ROM) SCHEMATIC DIAGRAM
3.8 MAIN (STROBE CONTROL AND STROBE FLASH) SCHEMATIC DIAGRAM
FROM
DSP96
(page 3-7)
TO
CCD UNIT
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
FROM
SYSCON
(page 3-5)
FROM
DSP96
(page 3-8)
FROM
DSP97
(page 3-10)
FROM
DSP96
(page 3-8)
FROM
DSP96
(page 3-8)
TO
DSP97
(page 3-10)
FROM
SYSCON
(page 3-5)
FROM
SYSCON
(page 3-6)
FROM
DSP96
(page 3-8)
FROM
SYSCON
(page 3-5)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
FROM
DSP97
(page 3-10)
TO/FROM
SYSCON
(page 3-5,6)
FROM
STROBE CONTROL
(page 3-14)
3-13 3-14
3.9 CCD SCHEMATIC DIAGRAM
3.10 MONI REG (MONITOR) SCHEMATIC DIAGRAMS
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
FROM
CDS AGC A/D
(page 3-13)
FROM
MONITOR UNIT
FROM
MONI REG (DC/DC)
(page 3-18)
NOTE : When ordering parts, be sure to order according
to the Part Number indicated in the Parts List.
FROM
MONI REG (DC/DC)
(page 3-18)
FROM
MONI REG (DC/DC)
(page 3-18)
3-15 3-16
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