Sanyo VHR-H803E User manual

KR2LN/E V5, S P3, E 3, KR4HN/E V2, S P2, E 5, E 6
REFERENCE No.SM5310495
SERVICE MANUAL
FILE NO.
Video Cassette Recorder
POWER
(VHR-H803E)
VHR-M263EV
(Product Code : 143 182 49)
(Europe)
VHR-M273SP
(Product Code : 143 182 47)
(Spain)
VHR-M293E
(Product Code : 143 182 45)
(U.K.)
VHR-H773EV
(Product Code : 143 182 48)
(Europe)
VHR-H773SP
(Product Code : 143 182 46)
(Spain)
VHR-H793E
(Product Code : 143 182 44)
(U.K.)
VHR-H803E
(Product Code : 143 182 43)
(U.K.)

REFERENCE
• 2HD : VHR-M293E / VHR-M273SP
VHR-M263EV
• 4HD Hi-Fi : VHR-H793E / VHR-H803E
VHR-H773SP / VHR-H773EV
• With Front A/V : VHR-H803E / VHR-M273SP
VHR-H773SP
• Without Front A/V : VHR-M293E/
VHR-H773EV/
VHR-M263EV/
VHR-H793E

1-1
TABLE OF CONTENTS
SECTION 1
SUMMARY
KEY TO ABBREVIATIONS . . . . . . . . . . . . . . . . 1-2
PRODUCT SAFETY SERVICING GUIDELINES
FOR VIDEO PRODUCTS . . . . . . . . . . . . . . . . . . 1-3
SERVICING PRECAUTIONS . . . . . . . . . . . . . . . 1-4
PROPOSAL FOR APPLYING SHORT
PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
SERVICE NOTICE ON REPLACING EEPROM . .1-6
SERVICE INFORMATION FOR EEPROM
IC SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 1-8
SECTION 2
CABINET & MAIN CHASSIS
SERVICE METHOD . . . . . . . . . . . . . . . . . . . . . 2-1
Electrical Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . 2-2
1. Cabinet & Main Frame Section . . . . . . . . . . . . . 2-2
2. Packing & Accessory Section . . . . . . . . . . . . . . 2-3
SECTION 3
ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS
ARRANGEMENT . . . . . . . . . . . . . . . . . . . . . . . .3-1
ELECTRICAL ADJUSTMENT PROCEDURES . . 3-2
1. Servo Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
ELECTRICAL TROUBLESHOOTING GUIDE . . . 3-4
1. Power Circuit(SMPS) . . . . . . . . . . . . . . . . . . . . . 3-4
2. Servo Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
3. System & Front Panel Circuit . . . . . . . . . . . . . . .3-10
4. Y/C Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
5. Tuner/IF Circuit . . . . . . . . . . . . . . . . . . . . . . . . .3-16
6. Hi-Fi Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . .3-21
1. Power Block Diagram . . . . . . . . . . . . . . . . . . . .3-21
2. Tuner/IF, NICAM & A2 Block Diagram . . . . . . . .3-23
3. VPS Block Diagram . . . . . . . . . . . . . . . . . . . . . .3-24
4. Y/C Block Diagram . . . . . . . . . . . . . . . . . . . . . .3-25
5. Hi-Fi Block Diagram . . . . . . . . . . . . . . . . . . . . .3-26
6. System Block Diagram . . . . . . . . . . . . . . . . . . .3-27
CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . .3-29
1. Power Circuit Diagram . . . . . . . . . . . . . . . . . . . .3-29
2. Tuner, NICAM/A2 Circuit Diagram . . . . . . . . . . .3-31
3. AVCP, SECAM, VPS Circuit Diagram . . . . . . . . .3-33
4. System Circuit Diagram . . . . . . . . . . . . . . . . . . .3-36
5. Hi-Fi, SCART Circuit Diagram . . . . . . . . . . . . . .3-39
6. Key Circuit Diagram . . . . . . . . . . . . . . . . . . . . .3-42
• CIRCUIT VOLTAGE CHART . . . . . . . . . . . . . . . .3-43
PRINTED CIRCUIT BOARD DIAGRAMS . . . . .3-47
1. MAIN P.C.Board . . . . . . . . . . . . . . . . . . . . . . . .3-47
2. KEY (LEFT) P.C.Board . . . . . . . . . . . . . . . . . . .3-49
SECTION 4
MECHANISM
SECTION 5
REPLACEMENT PARTS LIST
VHR-M293E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
VHR-H793E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-13
VHR-H803E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-27
VHR-M263EV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-41
VHR-H773EV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-53
VHR-M273SP(Spain) . . . . . . . . . . . . . . . . . . . . . . . . .5-67
VHR-H773SP(Spain) . . . . . . . . . . . . . . . . . . . . . . . . .5-79
NOTE) The table of contents for this section is edited
NOTE) separately.

1-2
A AC :Alternating Current
ACC :Automatic Color Control
ACSS :Automatic Channel Setting System
ADJ :Adjust
A/E :Audio Erase
AFC :Automatic Frequency Control
AFT :Automatic Fine Tuning
AGC :Automatic Gain Control
A.H.SW :Audio Head Switch
ALC :Automatic Level Control
AM :Amplitude Modulation
AMP :Amplifier
ANT :Antenna
APC :Automatic Phase Control
ASS’Y :Assembly
AUX :Auxiliary
B B :Base
BGP :Burst Gate Pulse
BPF :Bandpass Filter
BS :Brodcasting Satellite
BW or B/W :Black and White
C C :Capacitor, Chroma, Collector
CAN :Cancel
CAP :Capstan
CAP.BRK :Capstan Brake
CAP.RVS :Capstan Reverse
CATV :Cable Television
CBA :Circuit Board Assembly
CCD :Charge Coupled Device
C.CTL :Chro Control, Capstan Control
CFG :Capstan Frequency Generator
CHROMA :Chrominance
CNR :Chroma Noise Redution
COMB :Combination
Comb Filter
COMP :Comparator
Composite
Compensation
CONV :Converter
C.ROT SW :Color Rotary Switch
CS :Chip Selcet
C.SYNC :Composite Synchronization
CTL DIV :Control Divide
CUR :Current
CYL :Cylinder
D D :Drum, Digital, Diode, Drain
D.ADJ :Drum Adjust
DC :Direct Current
D.CTL :Drum Control
DEMOD :Demodulator
DET :Detector
DEV :Deviation
DHP :Double High Pass
DIGITRON :Digital Display Tube
DL :Delay line
DOC :Drop Out Compensator
DUB :Dubbing
D.V SYNC :Dummy Vertical Synchronization
E E :Emitter
EE :Electric to Eletric
EMPH :Emphasis
ENA :Enable
ENV :Envelope
EP :Extended Play
EQ :Equalizer
EXP :Expander
F F :Fuse
FB :Feed Back
FBC :Feed Back Clamp
FE :Full Erase
FG :Frequency Generator
FL :Filter
FM :Frequency Modulation
F/R :Front/Rear
FS :Frequency Synthesizer
FSC :Subcarrier Frequency
F/V :Frequency Voltage
G GEN :Generator
H H :High, Horizontal
I IC :Integrated Circuit
IF :Intermediate Frequency
INS :Insert
L L :Low, Left, Coil
LD :LED
LD VTG CTL :Loading Voltage Control
LECHA :Letter Character
L.M :Level Meter
LP :Long Play
LPF :Low Pass Filter
M MAX :Maximum
MD :Modulator
MECHA.CTL :Mechanism Control
MIC :Microphone
MIN :Minimum
MIX :Mixer, Mixing
M.M. :Monostable, Multivibrator
MMV :Mono Multi Vibrator
MOD :Modulation, Modulator
MODEM :Modulator-Demodulator
MPX :Multiplex
N NR :Noise Reduction
O OSC :Oscillator
OSD :On Screen Display
P PB :Playback
PCB :Printed Circuit Board
P.CTL :Power Control
PRE-AMP :Preamplifier
P.F :Power Failure
PG :Pulse Generator
PLL :Phase Locked Loop
PREM.DET :Premire Detect
P.P :Peak-to-Peak
PS :Phase Shift
PWM :Pulse Width Modulation
PWR CTL :Power Control
Q Q :Transistor
QH :Quasi Horizontal
QSR :Quick Setting Record
QTR :Quick Timer Record
QV :Quasi Vertical
R R :Resistor, Right
RE(or RC) :Remocon, Receiver
REC :Recording
REC S ‘H’ :Record Start ‘Hight’
REF :Reference
REG :Regulated, Regulator
REMOCON :Remote Control(unit)
RF :Radio Frequency
R/P :Record/Playback
RTC :Reel Time Counter
S S :Serial
S.ACCEL :Slow Accel
SAOP :Second Audio Program
SC :Scart, Simulcast
S.DET :Secam Detect
SH :Shift
SHARP :Sharpness
SIF :Sound Intermediate Frequency
SLD :Side Locking
S/N :Signal to Noise Ratio
SP :Standard Play
ST :Stereo
SUB :Subtract, Subcarrier
SW or S/W :Switch
SYNC :Synchronization
SYSCON :System Control
T T :Coil
TP :Test Point
TR :Transistor
TRK :Tracking
TRANS :Transformer
TU :Tuner, Take-up
U UHF :Ultra High Frequency
UNREG :Unregulated
V V :Volt, Vertical
VA :Always Voltage
VCO :Voltage Controlled Oscillator
VGC :Voltage Gain Control
VHF :Very High Frequency
V.H.SW :Video Head Switch
VISS :VHS Index Search
VPS :Video Program System
VR :Variable Resistor or Volume
V-SYNC :Vertical Synchronization
VTG :Voltage
VV :Voltage to Voltage
VXO :Voltage X-tal Oscillator
W W :Watt
WHT :White
W/O :With out
X X-TAL :Crystal
Y Y/C :Luminance/Chrominance
YNR :Luminance Noise Reduction
Z ZD :Zener Diode
SECTION1 SUMMARY
KEY TO ABBREVIATIONS

1-3
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-video service
technicians.
When servicing this product, under no circumstances should the original
design be modified or altered without permission from SANYO Electronics
Corporation. All components should be replaced only with types identical to
those in the original circuit and their physical location, wiring and lead dress
must conform to original layout upon completion of repairs.
Special components are also used to prevent x-radiation, shock and fire haz-
ard. These components are indicated by the letter “x” included in their compo-
nent designators and are required to maintain safe performance. No deviations
are allowed without prior approval by SANYO Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes
into the set is not delayed until the new service literature is printed.
CAUTION: Do not attempt to modify this product in any way. Never perform
customized installations without manufacturer’s approval. Unauthorized modi-
fications will not only void the warranty, but may lead to property damage or
user injury.
Service work should be performed only after you are thoroughly familiar with
these safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle is intended to
alert the service personnel to important safety information in the
service literature.
The lightning flash with arrowhead symbol within an equilateral tri-
angle is intended to alert the service personnel to the presence of
noninsulated “dangerous voltage” that may be of sufficient magni-
tude to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an equi-
lateral triangle is intended to convey to the service personnel the
following fuse replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND
RATING AS MARKED NEAR EACH FUSE.
SERVICE INFORMATION
While servicing, use an isolation transformer for protection from AC line shock.
After the original service problem has been corrected, make a check of the fol-
lowing:
FIRE AND SHOCK HAZARD
1. Be sure that all components are positioned to avoid a possibility of adjacent
component shorts. This is especially important on items trans-ported to and
from the repair shop.
2. Verify that all protective devices such as insulators, barriers, covers, shields,
strain reliefs, power supply cords, and other hardware have been reinstalled
per the original design. Be sure that the safety purpose of the polarized line
plug has not been defeated.
3. Soldering must be inspected to discover possible cold solder joints, solder
splashes, or sharp solder points. Be certain to remove all loose foreign par-
ticles.
4. Check for physical evidence of damage or deterioration to parts and compo-
nents, for frayed leads or damaged insulation (including the AC cord), and
replace if necessary.
5. No lead or component should touch a high current device or a resistor rated
at 1 watt or more. Lead tension around protruding metal surfaces must be
avoided.
6. After reassembly of the set, always perform an AC leakage test on all
exposed metallic parts of the cabinet (the channel selector knobs, antenna
terminals, handle and screws) to be sure that set is safe to operate without
danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-
FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per
volt or more sensitivity in the following manner: Connect a 1500 ohm, 10
watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a
known good earth ground water pipe, conduit, etc.) and the exposed metal-
lic parts, one at a time. Measure the AC voltage across the combination of
1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a
non-polarized adaptor and repeat AC voltage measurements for each
exposed metallic part. Voltage measured must not exceed 0.75 volts RMS.
This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti-
tutes a potential shock hazard and must be corrected immediately.
X-RADIATION
1. Be sure procedures and instructions to all service personnel cover the sub-
ject of x-radiation. The only potential source of x-rays in current TV receivers
is the picture tube. However, this tube does not emit x-rays when the HV is
at the factory-specified level. The proper value is given in the applicable
schematic. Operation at higher voltages may cause a failure of the picture
tube or high-voltage supply and, under certain circumstances may produce
radiation in excess of desirable levels.
2. Only factory-specified CRT anode connectors must be used.
3. It is essential that the service personnel have available an accurate and reli-
able high-voltage meter.
4. When the high-voltage circuitry is operating properly, there is no possibility
of an x-radiation problem. Every time a chassis is serviced, the brightness
should be run up and down while monitoring the high voltage with a meter,
to be certain that the high voltage does not exceed the specified value and
that it is regulating correctly.
5. When troubleshooting and making test measurements in a product with a
problem of excessively high voltage, avoid being unnecessarily close to the
picture tube and the high voltage power supply. Do not operate the product
longer than necessary to locate the cause of excessive voltage.
6. Refer to the CRT Anode High Voltage Measurement and Shutdown
Adjustment procedures described in the appropriate text (where used).
IMPLOSION
1. All direct view picture tubes are equipped with an integral implosion protec-
tion system; take care to avoid damage during installation.
2. Use only the recommended factory replacement tubes.
TIPS ON PROPER INSTALLATION
1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting
shelf space over, or close to, a heat duct, or in the path of heated air flow.
2. Avoid conditions of high humidity such as: outdoor patio installations where
dew is a factor, near steam radiators where steam leakage is a factor, etc.
3. Avoid placement where draperies may obstruct venting. The customer
should also avoid the use of decorative scarves or other coverings that
might obstruct ventilation.
4. Wall- and shelf-mounted installations using a commercial mounting kit must
follow the factory-approved mounting instructions. A product mounted to a
shelf or platform must retain its original feet (or the equivalent thickness in
spacers) to provide adequate air flow across the bottom. Bolts or screws
used for fasteners must not touch any parts or wiring. Perform leakage tests
on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in a tilt-
ed position, unless the receiver is properly secured.
6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small cast-
ers across thresholds or deep pile carpets.
7. Caution customers against using a cart or stand that has not been listed by
Underwriters Laboratories, Inc. for use with its specific model of television
receiver or generically approved for use with TVs of the same or larger
screen size.
8. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous conse-
quences to home and family.
A.C. Voltmeter
1500 OHM
10 WATT
Place this probe
on each exposed
metal part.
Good Earth Ground
such as the Water
Pipe, Conduit, etc.
0.15uF
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

1-4
SERVICING PRECAUTIONS
CAUTION : Before servicing the VCR covered by this service
data and its supplements and ADDENDUMS, read and fol-
low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir-
cumstances create conflict between the following servicing
precautions and any of the safety precautions in this publi-
cations, always follow the safety precautions.
Remember Safety First:
General Servicing Precautions
1. Always unplug the VCR AC power cord from the AC
power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnection or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an elec-
trolytic capacitor.
Caution : A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may result
in an explosion hazard.
2. Do not spray chemicals on or near this VCR or any of
its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
whitch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this VCR and/or any of its
electrical assemblies unless all solid-state device heat
sinks are cerrectly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connection the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter(500V)
to the blades of the attachment plug. The insulation resis-
tance between each blade of the attachment plug and acces-
sible conductive parts (Note 1) should be more than 1M-
ohm.
Note 1 : Accessible Conductive Parts including Metal pan-
els, Input terminals, Earphone jacks, etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field
effect transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor compo-
nent or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commer-
cially available discharging wrist strap device, which
should be removed for potential shock reasons prior to
applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such
as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a GROUNDED-tip soldering iron to solder or
unsolder ES devices.
4. Use only an anti-static solder removal device. Some
solder removal devices not classified a “anti-static”can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protec
tive package until immediately before you are ready to
install it. (Most replacement ES devices are packaged with
leads electrically shorted together by conductive foam,
aluminum foil, or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution : Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static elec-
tricity sufficient to damage an ES device.)

1-5
• The Contents of Examination
As all the IC that is applied to VCR is controlled by IIC, mutual communication, if Vcc of IC is short or open
with detecting ‘Acknowledge’data of the specific IC according to each power(5V, 5VT) µ-COM gets unable to
detect ‘ACK’data.
µ-COM regards this case as abnormal one and if it can’t detect ‘ACK’data for a certain time(3.5 sec) the sig-
nal of ‘Power Control’and ‘Timer Control’are switched to ‘Low’. As a result POWER Switching TR is kept from
generating heat and fire.
• POWER for each IC
5V POWER Modulator
5VT POWER AVCP IC
*Short protection off mode : DJ01 Diode in
PROPOSAL FOR APPLYING SHORT PROTECTION
IIC BUS
5VT SW POWER
CONTROL
MASTER
TIMER
CONTROL
5VT SW
SLAVE with 5V
SLAVE with 5V
5.3VA
Timer Control
AVCP IC
TUNER
Conception
BLOCK Diagram
5.2V 5.2VT
•IC to detect ‘ACK’data is selected as below because IC is different in accordance to region and option
5.3VA
Power Control
Modulator
Hi-Fi IC
NICAM IC
SECAM IC

1-6
In case that defective EEPROM of PAL models is replaced, to operate these sets from the initial state MP KEY
must be repaired as well before delivering to the customer.
If MP KEY isn’t repaired the setting of RF OUT channel or LANGUAGE might be different from that for cus-
tormer’s country.
•MP KEY : In case of PAL VCR if holding the REC button on the front panel and the CLEAR button 2’nd
remote control handset for 5 ~ 7 seconds with power being switch all and no tapes,
OK is LED becomes on.
This is the state that initializing EEPROM is finished.
•MP KEY's function : MP KEY sets EEPROM's data up to the initial state.
SERVICE NOTICE ON REPLACING EEPROM
TIMER
AM
REC
VCR
•LED CLOCK MODEL:
MP KEY Switch all on a Light

1-7
SERVICE INFORMATION FOR EEPROM IC SETTING
MODEL NAME HEX BINARY
VHR-M293E OPTION1 02 00000000
OPTION2 C0 00000000
OPTION3 82 00000000
OPTION4 F3 00000000
OPTION5 00 00000000
OPTION6 03 00000000
VHR-H793E OPTION1 2C 00000000
OPTION2 C2 00000000
OPTION3 82 00000000
OPTION4 F3 00000000
OPTION5 00 00000000
OPTION6 03 00000000
VHR-H803E OPTION1 BC 00000000
OPTION2 D3 00000000
OPTION3 8A 00000000
OPTION4 F3 00000000
OPTION5 00 00000000
OPTION6 03 00000000
VHR-M293IR OPTION1 02 00000000
OPTION2 C1 00000000
OPTION3 82 00000000
OPTION4 F4 00000000
OPTION5 00 00000000
OPTION6 00 00000000
VHR-H793IR OPTION1 AC 00000000
OPTION2 C3 00000000
OPTION3 8A 00000000
OPTION4 F4 00000000
OPTION5 00 00000000
OPTION6 00 00000000
VHR-M263EV OPTION1 02 00000000
OPTION2 C2 00000000
OPTION3 C0 00000000
OPTION4 82 00000000
OPTION5 F1 00000000
OPTION6 31 00000000
VHR-H773EV OPTION1 AC 00000000
OPTION2 C1 00000000
OPTION3 8A 00000000
OPTION4 F1 00000000
OPTION5 31 00000000
OPTION6 08 00000000
MODEL NAME HEX BINARY
VHR-M273SP OPTION1 72 00000000
OPTION2 C0 00000000
OPTION3 82 00000000
OPTION4 F1 00000000
OPTION5 54 00000000
OPTION6 08 00000000
VHR-H773SP OPTION1 7C 00000000
OPTION2 C0 00000000
OPTION3 82 00000000
OPTION4 F1 00000000
OPTION5 54 00000000
OPTION6 08 00000000
WR : OK I : EXIT MOVE : F G
EDIT : DE
1. DETECT NEW EEPROM (OPTION EDIT SCREEN)
- Eeprom EDIT screen automatically appears if replacing
Eeprom.
•Setup option data using the cursor Up/Down key of a
remote control.
(Setup upon BOM depending on OPT1~OPT6 model)
•Since an initial remote control is set to LG for LG model,
appropriately set optional data using the cursor Up/Down
key.
2. EEPROM WRITED COMPLETE SCREEN
- Writes data on EEPROM by using REMOCON "OK".
- If completing the option data screen with a menu key,
Powering Off is automatically done and the option edit
screen is arranged.
3. PG ADJUST
a) Insert the PAL SP Test Tape and play.
Note - Adjust the distance of X, pressing the
Tracking(+) or Tracking(-) when the “ATR”is
blink after the PAL SP Test Tape is inserted.
b) Press the Auto PG KEY on JIG Remocon(1’st) or Press
“REC”key on set and “CLEAR”key on Remocon.(Then
check the blink “TRK OK”on CLK/LED-TRK is a Initial)
c) Press the Auto PG Key on JIG Remocon again (2’nd) or
press “REC”key on set and “CLEAR”key on Remocon
again.(Then check the blink “PG NG > PG OK”on
CLK/LED.)
4. EEPROM INITIAL
- SETUP is displayed in the field if pressing the FRONT
REC KEY with the remocon number "CLEAR" key
pressed in the status of powering Off.
- AUTO SEARCH is done since the initial screen of ACMS
is serviced if powering On.
- Check basic operation (PLAY/RECORD...)
EEPROM option code No. setting EEPROM option code No. setting procedure
NAME HEX BINARY
OPT1 00 00000000
OPT2 00 00000000
OPT3 00 00000000
OPT4 00 00000000
OPT5 00 00000000
OPT6 00 00000000
WR : OK I : EXIT MOVE : F G
EDIT : DE
MASKROM : R00
EEPROM : R00 LG CODE

1-8
SPECIFICATIONS
General
Power : 200~240V, 50Hz
Power consumption : Approx. 12 watts(Energy Saving mode : 3 watts)
Video Head system : Rotary 2heads, helical scanning system
(2HD MODEL)
Double azimuth 4 heads, helical scanning system
(4HD MONO, 4HD Hi-Fi Model)
Tape speed : 23.39 mm/sec (SP mode)11.69 mm/sec(LP mode)
Tape format : Tape width 1/2”(12.7 mm high density VHS tape)
Maximum recording time : 4 hours in SP mode/8 hours in LP mode (with E-240 tape)
Rewind time : Approx. 150 sec. (with E-180 tape)
Dimensions (W X H X D) : 360 x 94.5 x 270 mm
Weight : 9.0 lbs. (4.0 kg)
Operating temperature : 41°F-95°F (5°C-35°C)
Operating humidity : Less than 80%
Timer : 24 hours display type
Video
Television system : CCIR standard (625 lines, 50 fields)
PAL colour signal
Recording format : PAL B/G
(VHR-M263EV/VHR-H773EV/
VHR-M273SP/VHR-H773SP)
PAL I (VHR-M293E/VHR-H793E/VHR-H803E)
PAL I/I (VHR-M293IR/VHR-H793IR)
Input level : VIDEO IN (SCART, RCA type)
1.0 Vp-p, 75 ohm, unbalanced
Output level : VIDEO OUT (SCART type)
1.0 Vp-p, 75 ohm, unbalanced
Signal to noise ratio : More than 43 dBm
Audio
Input level : AUDIO IN (SCART, RCA type)
Scart type : -6.0dBm, more than 10kΩ
RCA type : -6.0 dBm, more than 47kΩ
Output level : AUDIO OUT (SCART, RCA type)
Scart type : -6.0dBm, less than 1kΩ
RCA type : -6.0 dBm, less than 1kΩ
Audio track Mono track & Hi-Fi track
Audio signal to noise ratio : Normal : More than 70 dBm(JIS A filter)
Audio dynamic range : Hi-Fi audio : More than 85 dBm(JIS A filter)
•Design and specifications are subject to change without notice.
:Hi-Fi Model only

2-1
SECTION 2 CABINET & MAIN CHASSIS
SERVICE METHOD
Fig.2-1
Electrical Part
(1) Re-assembly Flow for service like Fig. 2-1
(2) To check and replace Electrical parts
2Re-assemble the unit according to No.1) Re-assembly Flow.
3Place the unit like Fig. 2-1
4 Check and replace Electrical parts.
NOTE :
1Insert Video Cassette Tape inversely like Fig. 2-1 to check and replace defective parts.
2In disassembling and reassembling, be careful not to damaged CST switch.
Timer C.B.A
Main C.B.A
Housing & Deck
Assembly
Timer C.B.A
Housing & Deck Ass'y
Cassette Tape
(Upside Down)
Main C.B.A
(Positioned Upside Down)

2-2
EXPLODED VIEWS
1. Cabinet and Main Frame Section
A46
260
452
330
323
A43
283
280
284
300
TU701(TUNER)
2SCART
1SCART
457
320
457
A42
250
462
462
A00
275
LED502(LED501)
457
457
A
5
4
3
2
1
BCD
NOTE) Refer to “SECTION 5 REPLACEMENT
PARTS LIST”in order to look for the
part number of each part.
_ OPTIONAL PARTS

2.Packing Accessory Section
CABLE ASS'Y RF810
REMOCON900
COVER BATTERY910
PACKING (RF)803
PACKING (LF)803
BOX CARTON802
BAG804
INSTRUCTION ASSEMBLY801
BATTERY808
NOTE) Refer to “SECTION REPLACEMENT PARTS LIST
NOTE) in order to look for the part number of each part.
2-3

3-1
NICAM
(COMPONENT SIDE)
SCART JACK
Hi-Fi
SYSTEM
AVCP
Micom
T
U
N
E
R
Speak-ez SW/IC
SECAM
VPS
EEPROM
CLK IC
W501
H.S/W
E2PROM
C+
S
M
P
SA/V
W502
DISPLAY(DOT,CLK)
: Measurement point
: Adjustment point
SECTION 3 ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT

3-2
ELECTRICAL ADJUSTMENT PROCEDURES
1. Servo Adjustment
1) PG Adjustment
•Test Equipment
•Adjustment And Specification
a) OSCILLOSCOPE
b) PAL TEST TAPE (VHS SP)
MODE
PLAY
•Adjustment Procedure
a) Insert the PAL SP Test Tape and play.
Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the “ATR”is blink after the
PAL SP Test Tape is inserted.
b) Press the Auto PG KEY on JIG Remocon(1’st) or Press “REC”key on set and “CLEAR”key on
Remocon.(Then check the blink “TRK OK”on CLK/LED-TRK is a Initial)
c) Press the Auto PG Key on JIG Remocon again (2’nd) or press “REC”key on set and “CLEAR”key on
Remocon again.(Then check the blink “PG NG > PG OK”on CLK/LED.)
•Check the PG
a) Connect the CH1 of the oscilloscope to the H/SW and CH2 to the Video out for the VCR.
b) Trigger the mixed Video Signal of CH2 to the CH1 H/SW(W501, W502), and then check the distance
(time difference), which is from the selected A(B) Head point of the H/SW(W501, W502) signal to the
starting point of the vertical synchronized signal, to 6.5H ± 0.5H (416µs, 1H=64.0µs).
•CONNECTION
V.Out
H/SW(W501, W502) 6.5 ± 0.5H
MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION
V.Out
H/SW(W501,W502)
OSCILLOSCOPE
CH1 CH2
V.outH/SW
(W501, W502)

3-3
ELECTRICAL ADJUSTMENT PROCEDURES
•WAVEFORM
•Attension and Reference
a) The PG checking must do when RF Level is Maximum and SERVO system is Locking (MTR MODE)
b) V.H/SW Level is 2Vpp.
H/SW
Composite
VIDEO
6.5H(416us)

3-4
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power Circuit(SMPS)
(1) No 5.3VA.
No 5.3VA.
Is the F101 normal?
Is the BD101 normal?
Is the R101 normal?
Does the oscillation waveform appear at
the IC101 Pin 7?
Is there DC voltage at the IC101 Pin 4?
Is there about 2.5V at the IC103 Vref ?
Is the D106 normal?
Check the Main PCB 5.3VA Line short?
Replace the F101
(Use the same Fuse).
Replace the BD101.
Replace the R101.
Is Vcc(about 13~15V) permittable at the
IC101 Pin 3?
Check or Replace the D103.
Replace the IC102.
Replace the IC103.
Replace the D106.
NO
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO

3-5
Is the D109 normal? Replace the D109.
Check 12VA Line of the Main PCB short.
YES
YES
No 12VA.
Does 5.3VA work normally? Check whether 5.3VA is out of order.
YES
NO
NO
7. Power Circuit(SMPS)
(2) No 12VA.(Capstan)
(3) No 12VA (CANAL, Buffer)
Is Voltage(about 12V) put into the
Q155(C)?
Check or Replace the Q155.
YES
YES
No 12VA.
Is Vcc(about 13VA) put into the Q155(E)? Replace the Peripheral Circuitry of D160.
YES
NO

7. Power Circuit(SMPS)
(4) No 5VT(5V)
Is about 4.7V put into the
Q152(Q151) Base?
Check the Q163(Q162)
whether it works normally.
Check or Replace the Q152(Q151).
YES
YES
No 5VT.(5V)
Is the Q163(Q162) Base “H”?
Is 5.3VA put into the Q152(Q151)
collector?
Check the µ-com Control.
YES
YES
NO
NO
3-6

3-7
2. Servo Circuit
Unstable Video in PB
Mode.
Does the on screen noise
level change periodically?
Do CTL pulses appear at
IC501 pin 8?
Does the CFG divide
waveform appear at IC501
pin 9?
Do the CTL pulses move
when TRK is operated?
Replace IC501.
Does the Video Envelope
waveform appear at IC501
Pin 24?
NO
YES
YES
YES
YES
YES
A.
Is the height of the CTL
Head adjusted correctly?
NO
Replace IC501.
NO
Check AVCP IC.
NO
Adjust the CTL Head.