JVC HR-J672EU User manual

SERVICE MANUAL
VIDEO CASSETTE RECORDER
No. 82788
February 2000
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-J670EU/J672EU/673EU/J470EU/J472EU/J270EU/J272EU)
Regarding service information other than these sections, refer to the HR-J670EU service manual (No. 82784).
Also, be sure to note important safety precautions provided in the service manual.
HR-J672EU/J673EU
This service manual is made from all recycled paper.
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
GENERAL
Power requirement : AC 220 – 240 V`, 50/60 Hz
Power consumption
[HR-J670/672/673EU]
Power on : 19 W
Power off : 4.9 W
[HR-J470/472/270/272EU]
Power on : 17 W
Power off : 4.9 W
Temperature
Operating : 5°C to 40°C
Storage : –20°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD) : 400 x 94 x 278 mm
Weight : 3.5 kg
Format : VHS PAL standard
Maximum recording time
(SP) : 240 min. with E-240 video cassette
(LP) [HR-J670/672/673/470/472EU only]
: 480 min. with E-240 video cassette
VIDEO/AUDIO
Signal system : PAL-type colour signal and CCIR
monochrome signal, 625 lines 50 fields
Recording system : DA4 (Double Azimuth) head helical scan
system [HR-J670/672/673/470/472EU]
Rotary two-head herical scan system
[HR-J270/272EU]
Signal-to-noise ratio : 45 dB
Horizontal resolution : 250 lines
Frequency range : 70 Hz to 10,000 Hz (Normal audio)
20 Hz to 20,000 Hz (Hi-Fi audio)
[HR-J670/672/673EU only]
Input/Output : 21-pin SCART connectors :
IN/OUT x 1, IN/DECODER x 1
RCA connectors: AUDIO OUT x 1
[HR-J670/672/673EU only]
TUNER/TIMER
TV channel storage capacity
: 99 positions (+AUX position)
Tuning system : Frequency synthesized tuner
Channel coverage : VHF 47 – 89/104 – 300/302 – 470MHz
UHF 470 – 862MHz
Aerial output : UHF channels 22 – 69 (Adjustable)
Memory backup time : Approx. 10 min.
ACCESSORIES
Provided accessories : RF cable,
Infrared remote control unit,
“R6” battery x 2
Optional accessories : Satellite Controller RM-SD1
Specifications shown are for SP mode unless otherwise specified.
E.& O.E. Design and specifications subject to change without notice.

1
Notes : Mark is same as left.
Mark *HR-J670EU was also change.
TABLE OF CONTENTS
DIFFERENT TABLE .................................................................................................................................................................. 1
4. CHARTS AND DIAGRAMS (4-1 to 4-3)
4.1 DEMODULATOR CIRCUIT BOARD ............................................................................................................................. 4-1
4.2 DEMODULATOR SCHEMATIC DIAGRAM ................................................................................................................... 4-2
5. PARTS LIST (5-1 only)
5.1 ELECTRICAL PARTS LIST ........................................................................................................................................... 5-1
DEMODULATOR BOARD ASSEMBLY <14>....................................................................................................................... 5-1
The following table indicate main different points between models HR-J670EU, HR-J672EU and HR-J673EU.
MODEL HR-J670EU HR-J672EU HR-J673EU
ITEM
FRONT PANEL COLOR SILVER BLACK SILVER
The following table indicate different parts number between models HR-J670EU, HR-J672EU and HR-J673EU.
!REF. MODEL
HR-J670EU HR-J672EU HR-J673EU
NO. ITEM
306 REMOTE CONTROLLER LP20878-002A LP20878-003A LP20878-002A
306A COVER(BATTERY) LP40610-002A LP40610-001A LP40610-002A
PACKING AND ACCESSORY ASSEMBLY <M1>
!REF. MODEL
HR-J670EU HR-J672EU HR-J673EU
NO. ITEM
!501 FRONT PANEL ASSY LP10289-003D LP10289-026C LP10289-027B
501A CASETTE DOOR LP20868-002A LP20868-004A LP20868-010A
501C DISPLAY WINDOW LP20869-003A LP20869-033A LP20869-034A
!502 TOP COVER LP10013-017C LP10013-023C LP10013-017C
CABINET AND CHASSIS ASSEMBLY <M2>
!REF. MODEL
HR-J670EU HR-J672EU HR-J673EU
NO. ITEM
PW1 DEMODULATOR BOARD ASSY *LPA10094-02A
DEMODULATOR BOARD ASSEMBLY <14>

4-1
4.1 DEMODULATOR CIRCUIT BOARD
REF.NO. LOCATIONREF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION RE
F.
COMPONENT PARTS LOCATION GUIDE <DEMODULATOR>
CAPACITOR
C6701 B C 1A
C6702 B C 2A
C6703 B C 1B
C6704 B C 1B
C6705 B C 2B
C6706 B C 2B
C6707 B C 2B
C6708 B C 2A
C6709 B C 2A
C6710 B C 3B
C6711 B C 3B
C6712 B C 4B
C6713 B C 4C
C6714 B C 4C
C6715 A D 4D
C6716 B C 3D
C6717 A D 4D
C6718 B C 3D
C6719 A D 3D
C6720 A D 2D
C6721 B C 2C
C6722 A D 1D
C6723 B C 2C
C6724 A D 1C
CONNECTOR
CN6701 AD 3A
DIODE
D6701 A D 4B
IC
IC6701 B C 3C
COIL
L6701 A D 1A
L6702 A D 1C
R6716 B C 4C
R6718 B C 1C
R6719 A D 2A
R6720 B C 3D
R6721 B C 2D
OTHER
K6701 B C 1B
K6702 B C 2B
K6703 B C 3B
K6704 B C 3B
K6705 B C 3B
K6706 B C 3D
K6707 B C 1C
X6701 A D 2B
TRANSISTOR
Q6701 B C 1B
RESISTOR
R6701 B C 1A
R6702 B C 2A
R6703 B C 1A
R6704 B C 1B
R6705 B C 2A
R6706 B C 2B
R6707 B C 1B
R6708 B C 3A
R6709 B C 3A
R6710 B C 4B
R6711 B C 4C
R6712 B C 3C
R6713 B C 3C
R6714 B C 3D
R6715 B C 3D
SECTION 4
CHARTS AND DIAGRAMS

L
L
L
R
R
C6718
OPEN
C6722
OPEN
R6718
OPEN
C6703
OPEN
C6706
OPEN R6707
TU MUTE
TO TUNER
CN6701
1
2
3
5
4
ABC D
DEMOD
4.2 DEMODULATOR SCHEMATIC DIAGRAM
(Page 4-14)
OPEN
47
4-2

L
R
C6718
OPEN
C6706
OPEN R6707
R6715
22k
R6713
22k
R6710
C6712
OPEN
C6711
OPEN
C6710
OPEN
X6701
(18.432MHz)
DE F GH
47
12
4-3
TO SYSCON (Page 4- ):
TO SYSCON (Page 4- ):
Example)
NOTE : How to find the page showing the continuative schematic diagram
Refer to the HR-J670EU service manual (NO.82784)
Refer to this sevice manual
the Part Number indicated in the Parts List.
When ordering parts,be sure to order according toNOTE :

✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽✽
DEMOD BOARD ASSEMBLY <14>
PW1 LPA10094-02A DEMOD BOARD ASSY
IC6701 MSP34VCDT IC
Q6701 2SC3936/BC/-X TRANSISTOR
D6701 1SS133 DIODE
or 1N4148M DIODE
R6701 NRSA02J-392X MG RESISTOR 3.9kØ,1/10W
R6702 NRSA02J-682X MG RESISTOR 6.8kØ,1/10W
R6703 NRSA02J-470X MG RESISTOR 47Ø,1/10W
R6704 NRSA02J-102X MG RESISTOR 1kØ,1/10W
R6705 NRSA02J-271X MG RESISTOR 270Ø,1/10W
R6706 NRSA02J-151X MG RESISTOR 150Ø,1/10W
R6707 NRSA02J-470X MG RESISTOR 47Ø,1/10W
R6708 NRSA02J-101X MG RESISTOR 100Ø,1/10W
R6709 NRSA02J-101X MG RESISTOR 100Ø,1/10W
R6710 NRSA02J-120X MG RESISTOR 12Ø,1/10W
R6711 NRSA02J-684X MG RESISTOR 680kØ,1/10W
R6712 NRSA02J-102X MG RESISTOR 1kØ,1/10W
R6713 NRSA02J-223X MG RESISTOR 22kØ,1/10W
R6714 NRSA02J-102X MG RESISTOR 1kØ,1/10W
R6715 NRSA02J-223X MG RESISTOR 22kØ,1/10W
R6716 NRSA02J-470X MG RESISTOR 47Ø,1/10W
R6719 QRE141J-103Y RESISTOR 10kØ,1/4W
R6720 NRSA02J-562X MG RESISTOR 5.6kØ,1/10W
R6721 NRSA02J-562X MG RESISTOR 5.6kØ,1/10W
C6701 NCB21HK-103X CAPACITOR 0.01µF,50V
C6702 NCB21HK-222X CAPACITOR 0.0022µF,50V
C6704 NCB21HK-103X CAPACITOR 0.01µF,50V
C6705 NCB21HK-102X CAPACITOR 0.001µF,50V
C6707 NDC21HJ-470X CAPACITOR 47pF,50V
C6708 NDC21HJ-8R0X CAPACITOR 8pF,50V
C6709 NDC21HJ-1R0X CAPACITOR 1pF,50V
C6713 NCF21CZ-224X CAPACITOR 0.22µF,16V
C6714 NCB21HK-682X CAPACITOR 0.0068µF,50V
C6715 QEKJ1HM-225 E CAPACITOR 2.2µF,50V
C6716 NCB21HK-682X CAPACITOR 0.0068µF,50V
C6717 QEKJ1HM-225 E CAPACITOR 2.2µF,50V
C6719 QEKJ1CM-106 E CAPACITOR 10µF,16V
C6720 QEKJ1CM-106 E CAPACITOR 10µF,16V
C6721 NCB21HK-103X CAPACITOR 0.01µF,50V
C6723 NCB21HK-103X CAPACITOR 0.01µF,50V
L6701 QQL231J-1R0Y COIL 1µH
L6702 QQL231J-3R3Y COIL 3.3µH
X6701 QAX0443-001 CRYSTAL RESONATOR
K6701 NQR0200-003X FERRITE BEAD
K6702 NQR0200-003X FERRITE BEAD
K6703 NQR0200-003X FERRITE BEAD
K6704 NQR0200-003X FERRITE BEAD
K6705 NQR0200-003X FERRITE BEAD
K6706 NQR0200-003X FERRITE BEAD
BK1 LP40077-001A BRACKET(BOARD)
CN6701 QGG2502K1-10 HEADER PIN
--------------- ----------------------- ----------------------------------------------------- ---------------- ----------------------- ------------------------------------------------
# REF No. PART No. PART NAME, DESCRIPTION # REF No. PART No. PART NAME, DESCRIPTION
5-1
SECTION 5
PARTS LIST
SAFETY PRECAUTION
Parts identified by the symbol are critical for safety. Replace only with specified part numbers.
V13D11/D12
HR-J672EU/J673EU E. & O. E. No. 82788
5.1 ELECTRICAL PARTS LIST

Printed in Japan
VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION
S40894