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SERVICE MANUAL
No.82877
June 2001
HR-J780KR
VIDEO CASSETTE RECORDER
Regarding service information other than these sections, refer to the HR-VP690U service manual (No.82841).
Also, be sure to note important safety precautions provided in the service manual.
SPECIFICATIONS
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without
notice.
GENERAL
Power requirement
: AC 110 V ­ 220 Vd, 60 Hz
Power consumption
Power on
: 16 W
Power off
: 2.0 W
Temperature
Operating
: 5
°C to 40°C
Storage
: ­20
°C to 60°C
Operating position
: Horizontal only
Dimensions (W x H x D) : 400 mm x 94 mm x 278 mm
Weight
: 3.1 kg
Format
: VHS NTSC standard
Maximum recording time
SP
: 210 min. with ST-210 video cassette
EP
: 630 min. with ST-210 video cassette
VIDEO/AUDIO
Signal system
: NTSC-type color signal and EIA
monochrome signal, 525 lines/
60 fields
Recording/Playback
system
: DA-4 (Double Azimuth) head helical
scan system
Signal-to-noise ratio
: 45 dB
Horizontal resolution
: 230 lines
Frequency range
Normal audio
: 70 Hz to 10,00 0Hz
Hi-Fi audio
: 20 Hz to 20,00 0Hz
Input/Output
: RCA connectors (IN x 2, OUT x 1)
TUNER
Tuning system
: Frequency-synthesized tuner
Channel coverage
VHF
: Channels 2­13
UHF
: Channels 14­69
CATV
: 113 Channels
RF output
: Channel 3 or 4 (switchable; preset to
Channel 3 when shipped) 75 ohms,
unbalanced
TIMER
Clock reference
: Quartz
Program capacity
: 1-year programmable timer/
8programs
Memory backup time
: Approx. 3 min.
ACCESSORIES
Provided accessories
: RF cable,
Infrared remote control unit,
"AA" battery x 2


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TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
DIFFERENT TABLE .................................................................... 1 to 2
4. CHARTS AND DIAGRAMS (4-1 to 4-24)
4.1
BOARD INTERCONNECTIONS ..................................... 4-2
4.2
MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM ............ 4-4
4.3
MAIN (SYSCON) SCHEMATIC DIAGRAM ..................... 4-6
4.4
MAIN (SW.REG) SCHEMATIC DIAGRAM ...................... 4-8
4.5
MAIN (TUNER/DEMOD) SCHEMATIC DIAGRAM ....... 4-10
4.6
MAIN (FRONT) SCHEMATIC DIAGRAM ...................... 4-12
4.7
MAIN (TERMINAL) SCHEMATIC DIAGRAM ................ 4-14
4.8
MAIN (BS CONNECTION) AND R.PAUSE SCHEMATIC DIAGRAMS ...... 4-16
4.9
DEMODULATOR SCHEMATIC DIAGRAM ....................... 4-18
4.10 MAIN AND R. PAUSE CIRCUIT BOARDS ........................ 4-20
4.11 DEMODULATOR CIRCUIT BOARD ............................. 4-23
4.12 REMOTE CONTROLLER SCHEMATIC DIAGRAM ..... 4-24
4.13 FDP GRID ASSIGNMENT AND
ANODE CONNECTION ............................... 4-24
5. PARTS LIST (5-1 to 5-10)
5.1
PACKING AND ACCESSORY ASSEMBLY <M1> .......... 5-1
5.2
FINAL ASSEMBLY <M2> ................................................ 5-2
5.3
MECHANISM ASSEMBLY <M4> .................................... 5-4
5.4
ELECTRICAL PARTS LIST ............................................. 5-6
MAIN BOARD ASSEMBLY <03> .................................... 5-6
DEMOD BOARD ASSEMBLY<14> ................................... 5-10
The following table indicate main different points between models HR-VP690U and HR-J780KR.
MODEL
HR-VP690U
ITEM
POWER VOLTAGE
120V
110-220V
POWER PLUG
UL,CSA
KOREAN
POWER SAVE
USED
NOT USED
BODY COLOR
MOLD-BLACK
PAINT-PURE SILVER
CHASSIS DIMENSIONS (WxHxD)mm
400x94x212
400x94x265
WINDOW COLOR
SMOKE DARK GRAY SMOKE LIGHT GRAY
REMOTE CONTROLLER UNIT COLOR
MOLD-BLACK
PAINT-SILVER
INSTRUCTION LANGUAGE
ENGLISH
KOREAN
HEAD CLEANER
NOT USED
USED
FORWARD SLOWMOTION
1/6
1/6, 1/18
REVERSE SLOWMOTION
NOT USED
-1/6, -1/18
FRONT INPUT CONNECTOR COLOR
BLACK
YELLOW,WHITE,RED
REAR INPUT CONNECTOR
NOT USED
USED
R.PAUSE/AV COMPU CONNECTOR
NOT USED
USED
STEREO DECODER
MTS
A2(KOREA)
(Multi-channel TV Sound)
SUMMER TIME ADJUST
USED
NOT USED
AUTO CLOCK/JUST CLOCK
USED
NOT USED
VCR PLUS+
VCR+
G-CODE
OSD LANGUAGE
ENGLISH, SPANISH, FRENCH
ENGLISH
HR-J780KR
The following tables indicate different parts number between models HR-VP690U and HR-J780KR.
PACKING AND ACCESSORY ASSEMBLY<M1>
PACKING AND ACCESSORY ASSEMBLY<M1> is indicated on the parts list.
FINAL ASSEMBLY<M2>
FINAL ASSEMBLY<M2> is indicated on the parts list.
MECHANISM ASSEMBLY<M4>
MECHANISM ASSEMBLY<M4> is indicated on the parts list.
MAIN BOARD ASSEMBLY<03>
REF
NO.
!
MODEL
HR-VP690U
ITEM
PW1
MAIN BOARD ASSEMBLY
LPA10130-04C1
LPA10141-01B1
HR-J780KR
Notes: Mark
is same as left.
Mark ­­ is not used.
Mark *
reference model was also changed.
1
DEMOD BOARD ASSEMBLY<14>
REF
NO.
!
MODEL
HR-VP690U
ITEM
PW1
DEMOD BOARD ASSEMBLY
­­­
LPA10094-06B
HR-J780KR


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2
Notes: Mark
is same as left.
Mark ­­ is not used.
Mark *
reference model was also changed.
MINI FRONT BOARD ASSEMBLY<28>
REF
NO.
!
MODEL
HR-V690U
ITEM
PW6
MINI FRONT BOARD ASSY
LPA10130-01A6
­­­
R7043
MG RESISTOR
NRSA02J-272X
­­­
R7044
MG RESISTOR
NRSA02J-472X
­­­
R7045
MG RESISTOR
NRSA02J-682X
­­­
S7021
TACT SWITCH
QSW0456-002Z
­­­
S7022
TACT SWITCH
QSW0456-002Z
­­­
S7023
TACT SWITCH
QSW0456-002Z
­­­
CN7002 FPC CONNECTOR
QGF1208C1-09
­­­
HR-J780KR
R.PAUSE BOARD ASSEMBLY<91>
REF
NO.
!
MODEL
HR-V690U
ITEM
PW2
R.PAUSE BOARD ASSEMBLY
­­­
LPA10141-01B2
R7156 MG RESISTOR
­­­
NRSA02J-101X
B7151 MG RESISTOR
­­­
NRSA02J-0R0X
B7152 MG RESISTOR
­­­
NRSA02J-0R0X
J7104
MINI JACK
­­­
PU60612
HR-J780KR


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