SERVICE MANUAL
audio
Input level : AUDIO IN (SCART type) –6.0 dBm, more than 10 kΩ
Output level : AUDIO OUT (SCART, RCA type) –6.0 dBm, less than 1 kΩ
Audio track : Mono track and Hi-Fi track
Audio frequency response
Normal audio : 100 Hz to 10,000 Hz (–6/+3 dBm)
Hi-Fi audio : 20 Hz to 20,000 Hz (–3/+3 dBm)
Audio signal to noise ratio
Hi-Fi audio : More than 70 dB (JIS A filter)
Audio dynamic range
Hi-Fi audio : More than 85 dB (JIS A filter)
accessories
Provided accessories : RF cable, Infrared remote control unit, “CR 2032” battery x 1
Specifications shown are for SP mode unless otherwise specified.
E.& O.E. Design and specifications subject to change without notice.
VIDEO CASSETTE RECORDER
HR-V200EZ, HR-V205EK,
HR-V500EZ, HR-V505EK, HR-V505EZ
PAL
S PECIFICATIONS
Power consumption : Power on : Approx. 12 W : Standby mode:3.0 W
Video Head system : DA4 (Double Azimuth) head helical scan system
Tape format : Tape width 1/2" (12.7 mm high density VHS tape)
Signal system: PAL-type colour signal and CCIR monochrome signal, 625 lines 50 fields
Input level : VIDEO IN (SCART type) 1.0 Vp-p, 75 ohm, unbalanced
Output level : VIDEO OUT (SCART type) 1.0 Vp-p, 75 ohm, unbalanced
Power: 200 V – 240 V, 50 Hz/60 Hz
(SP) : 240 min. with E-240 video cassette
(LP) : 480 min. with E-240 video cassette
Rewind time : Approx. 180 sec. with E-180 cassette
Dimensions (W x H x D) : 360 mm x 94.5 mm x 270 mm
Operating temperature : 5 °C to 35 °C
Operating humidity : Less than 80 %
RF modulator: UHF channels 22 – 68 (Adjustable)
Signal-to-noise ratio : More than 43 dBm
(The specifications shown pertain specifically to the model HR-V505EK.)
g e n e r a l
Tape speed
(SP) : 23.39 mm/sec
(LP) : 11.69 mm/sec
Maximum recording time
Weight : 4.0 kg
Timer: 24 hours display type
video
Recording Format : PAL I
RF reception : PAL I
RF OUT : PAL I
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD
HR-V200EZ, HR-V205EK, HR-V500EZ, HR-V505EK, HR-V505EZ, V16A0,A1,D0,D1-
No.82963
2003/05
TABLE OF CONTENTS
SECTION 1
SUMMARY
KEY TO ABBREVIATIONS . . . . . . . . . . . . . . . . 1-1
Important Safety Precautions
PROPOSAL FOR APPLYING SHORT
PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
SERVICE NOTICE ON REPLACING EEPROM . .1-5
SERVICE INFORMATION FOR EEPROM
IC SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
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. A/V, SECAM, VPS Circuit Diagram . . . . . . . . . .3-33
4. System Circuit Diagram . . . . . . . . . . . . . . . . . . .3-35
• WAVEFORM & VOLTAGE SHEET. . . . . . . . . . . .3-37
5. Hi-Fi, SCART Circuit Diagram . . . . . . . . . . . . . .3-39
• CIRCUIT VOLTAGE CHART . . . . . . . . . . . . . . . .3-41
PRINTED CIRCUIT BOARD DIAGRAMS . . . . .3-45
1. MAIN P.C.Board . . . . . . . . . . . . . . . . . . . . . . . .3-45
SECTION 4
MECHANISM
NOTE) The table of contents for this section is edited
NOTE) separately.
SECTION 5
REPLACEMENT PARTS LIST
5.1 EXPLODED VIEW 5-1
5.1.1
5.1.2 FINAL ASSEMBLY <M2> 5-2
5.1.3 MECHANISM ASSEMBLY <M4> 5-3
5.2 REPLACEMENT PARTS LIST 5-4
PACKING AND ACCESSORY PARTS LIST<M1> 5-4
FINAL PARTS LIST<M2> 5-4
MECHANISM PARTS LIST<M4> 5-4
MAIN BOARD ASSEMBLY<03> 5-5
PACKING AND ACCESSORY ASSEMBLY <M1>
. . . . . . . . . . . . . . . . . . . . . . .
. . . .
. . . . . . . . . . . . . .
. . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
5-1
.
The following table indicates main different points between models HR-V200EZ, HR-V205EK, HR-V500EZ, HR-V505EK and HR-V505EZ.
ITEM
BROADCASTING STANDARD
AUDIO MONO HiFi
STEREO DECODER NOT USED NOT USED
VIDEO HEAD 2 4
TAPE SPEED SP SP/LP
SHOWVIEW/VIDEOplus+
FRAME ADVANCE NOT USED USED
SLOW(FORWARD) NOT USED USED
DIGITAL SHUTTLE NOT USED USED
HiFi AUDIO OUT(RCA) NOT USED USED
AV2 CONNECTOR NOT USED USED NOT USED
POWER PLUG CEE BS CEE BS CEE
Notes: Mark is same as left.
MODEL
HR-V200EZ
PAL B/G,D/K PAL I PAL B/G,D/K PAL I PAL B/G,D/K
NOT USED VIDEOplus+ NOT USED VIDEOplus+ SHOWVIEW
HR-V500EZHR-V205EK HR-V505EZHR-V505EK
NICAM, 2 Carrier
NICAM
NICAM,2 Carrier
SECTION1 SUMMARY
KEY TO ABBREVIATIONS
A AC :Alternating Current
B B :Base
C C :Capacitor, Chroma, Collector
D D :Drum, Digital, Diode, Drain
E E :Emitter
F F :Fuse
G GEN :Generator
H H :High, Horizontal
I IC :Integrated Circuit
L L :Low, Left, Coil
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
BGP :Burst Gate Pulse
BPF :Bandpass Filter
BS :Brodcasting Satellite
BW or B/W :Black and White
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
COMP :Comparator
CONV :Converter
C.ROT SW :Color Rotary Switch
CS :Chip Selcet
C.SYNC :Composite Synchronization
CTL DIV :Control Divide
CUR :Current
CYL :Cylinder
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
EE :Electric to Eletric
EMPH :Emphasis
ENA :Enable
ENV :Envelope
EP :Extended Play
EQ :Equalizer
EXP :Expander
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
IF :Intermediate Frequency
INS :Insert
LD :LED
LD VTG CTL
LECHA :Letter Character
L.M :Level Meter
LP :Long Play
Comb Filter
Composite
Compensation
:Loading Voltage Control
M MAX :Maximum
N NR :Noise Reduction
O OSC :Oscillator
P PB :Playback
Q Q :Transistor
R R :Resistor, Right
S S :Serial
T T :Coil
U UHF :Ultra High Frequency
V V :Volt, Vertical
W W :Watt
X X-TAL :Crystal
Y Y/C :Luminance/Chrominance
Z ZD :Zener Diode
LPF :Low Pass Filter
MD :Modulator
MECHA.CTL
MIC :Microphone
MIN :Minimum
MIX :Mixer, Mixing
M.M. :Monostable, Multivibrator
MMV :Mono Multi Vibrator
MOD :Modulation, Modulator
MODEM :Modulator-Demodulator
MPX :Multiplex
OSD :On Screen Display
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
QH :Quasi Horizontal
QSR :Quick Setting Record
QTR :Quick Timer Record
QV :Quasi Vertical
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.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
TP :Test Point
TR :Transistor
TRK :Tracking
TRANS :Transformer
TU :Tuner, Take-up
UNREG :Unregulated
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
WHT :White
W/O :With out
YNR :Luminance Noise Reduction
:Mechanism Control
1-1
Important Safety Precautions
Connector
Metal sleeve
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes
of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the
following precautions when a set is being serviced.
v
Precautions during Servicing
1. Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the
operation and service manuals.
2. Parts identified by the symbol and shaded ( ) parts are
critical for safety.
Replace only with specified part numbers.
Note: Parts in this category also include those specified to com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape 3) Spacers 5) Barrier
2) PVC tubing 4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
cut close to connector
Fig.3
(2) Strip about 15 mm of the insulation from the ends of
the wires. If the wires are stranded, twist the strands to
avoid frayed conductors.
15 mm
7. Observe that wires do not contact heat producing parts
8. Check that replaced wires do not contact sharp edged or
9. When a power cord has been replaced, check that 10-15 kg of
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
Fig.1
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
pointed parts.
force in any direction will not loosen it.
Power cord
Fig.2
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the
metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.
1.25
2.0
5.5
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Fig.7
Crimping tool
Crimped at approx. center
of metal sleeve
Conductors extended
1
S40888-01
v
Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d’) between soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
Chassis
Fig. 8
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs
and externally exposed accessible parts (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and
following table 2.
5. Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
AC inlet
Earth pin
Exposed accessible part
Grounding Specifications
Region
USA & Canada
Europe & Australia
Externally
exposed
accessible part
Grounding Impedance (Z)
d
d'
≤
Z 0.1 ohm
≤
Z 0.5 ohm
Power cord,
primary wire
Z
V
Fig. 9
ab
c
Milli ohm meter
Fig. 10
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
Region
Japan
USA & Canada
Europe & Australia R 10 MΩ/500 V DC
Region Load Z
Japan
USA & Canada
Europe & Australia
Table 2 Leakage current specifications for each region
Insulation Resistance (R)
≤
R 1 MΩ/500 V DC
≥≥
1 MΩ R 12 MΩ/500 V DC
≤
Table 1 Specifications for each region
1 kΩ
0.15 µF
1.5 kΩ
2 kΩ
50 kΩ
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC 3 kV 1 minute
AC 1.5 kV 1 minute
i 1 mA rms Exposed accessible parts
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
2
≤
≤
≤
≤
≤
≤
(Class 2)
(Class 1)
Clearance Distance (d), (d')
≤
d, d' 3 mm
≤
d, d' 4 mm
≤
d, d' 3.2 mm
≤
d 4 mm
≤
d' 8 mm (Power cord)
≤
d' 6 mm (Primary wire)
a, b, cLeakage Current (i)AC Line Voltage
Exposed accessible parts
Antenna earth terminals
Other terminals
S40888-01
PROPOSAL FOR APPLYING SHORT PROTECTION
IIC BUS
5VT SW
POWER
CONTROL
MASTER
TIMER
CONTROL
5VT SW
SLAVE with 5V
SLAVE with 5V
5.3VA
Power Control
Modulator
Hi-Fi IC
NICAM IC
SECAM IC
• 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’
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 signal of ‘Power Control’ and ‘Timer Control’ are switched to ‘Low’. As a result POWER Switching
generating heat and fire.
Conception
BLOCK Diagram
data of the specific IC according to each power(5V, 5VT) µ-COM gets unable to
TR is kept from
• POWER for each IC
5.2V 5.2VT
5.3VA
• IC to detect ‘ACK’ data is selected as below because IC is different in accordance to region and option
EF 5V POWER SECAM IC
AVCP IC
TUNER
Timer Control
Series 5VT POWER AVCP IC
Other 5V POWER Modulator
Series 5VT POWER AVCP IC
*Short protection off mode : DJ01 Diode in
1-4
SERVICE NOTICE ON REPLACING EEPROM
TIMER
AM
REC
VCR
OK
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 custormer’s country.
•MP KEY : In case of PALVCR if holding the REC button on the front panel and the CLEAR button on the
remote control handset for 5 ~ 7 seconds with power being switch all and no tapes,
OK is displayed at FLD for FLD models and LED becomes on for LED CLOCK models.
This is the state that initializing EEPROM is finished.
(In case of PAL VCP if holding the REC button on the front panel and the MENU button on the
remote control handset for 5 ~ 7 seconds with power being off and no tapes, All the LED DOTs
become 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.
• FLD MODEL:
MP KEY “OK”
• LED CLOCK MODEL:
MP KEY Switch all on a Light
• LED DOT MODEL:
MP KEY Switch all on a Light
1-5
SERVICE INFORMATION FOR EEPROM IC SETTING
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 : 8 t
EDIT : 67E
MASKROM : R00
EEPROM : R00 LG CODE
MODEL NAME HEX BINARY
HR-V200EX OPTION1 02 00000000
OPTION2 C0 00000000
OPTION3 87 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 08 00000000
HR-V200EY OPTION1 02 00000000
OPTION2 C0 00000000
OPTION3 87 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 08 00000000
HR-V200EL OPTION1 02 00000000
OPTION2 C0 00000000
OPTION3 87 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 08 00000000
HR-V205EX OPTION1 E2 00000000
OPTION2 C1 00000000
OPTION3 8F 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 68 00000000
HR-V205EY OPTION1 E2 00000000
OPTION2 C1 00000000
OPTION3 8F 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 68 00000000
HR-V205EL OPTION1 E2 00000000
OPTION2 C1 00000000
OPTION3 8F 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 68 00000000
HR-V206EX OPTION1 E2 00000000
OPTION2 C1 00000000
OPTION3 8F 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 68 00000000
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 PALSP 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 ser-
viced if powering On.
- Check basic operation (PLAY/RECORD...)
MODEL NAME HEX BINARY
HR-V206EY OPTION1 E2 00000000
OPTION2 C1 00000000
OPTION3 8F 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 68 00000000
HR-V206EL OPTION1 E2 00000000
OPTION2 C1 00000000
OPTION3 8F 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 68 00000000
HR-V500EX OPTION1 0C 00000000
OPTION2 C0 00000000
OPTION3 83 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 08 00000000
HR-V500EY OPTION1 0C 00000000
OPTION2 C0 00000000
OPTION3 83 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 08 00000000
1-6
EEPROM option code No. setting EEPROM option code No. setting
MODEL NAME HEX BINARY
HR-V500EL OPTION1 0C 00000000
OPTION2 C0 00000000
OPTION3 83 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 08 00000000
HR-V505EX OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 08 00000000
HR-V505EY OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 08 00000000
HR-V505EL OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 08 00000000
HR-V506EX OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 08 00000000
HR-V506EY OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 08 00000000
HR-V506EL OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 08 00000000
HR-V507EX OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 30 00000000
OPTION6 08 00000000
HR-V507EY OPTION1 EC 00000000
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 B0 00000000
OPTION6 08 00000000
MODEL NAME HEX BINARY
HR-V507EL OPTION1 EC 00000000
HR-V200EZ OPTION1 02 00000000
HR-V500EZ OPTION1 0C 00000000
HR-V505EZ OPTION1 0C 00000000
HR-V205EK OPTION1 02 00000000
HR-V505EK OPTION1 2C 00000000
HR-V205EF OPTION1 62 00000000
HR-V505EF OPTION1 6C 00000000
WR : OK I : EXIT MOVE :
OPTION2 C1 00000000
OPTION3 8B 00000000
OPTION4 B1 00000000
OPTION5 A0 00000000
OPTION6 08 00000000
OPTION2 C8 00000000
OPTION3 87 00000000
OPTION4 B7 00000000
OPTION5 00 00000000
OPTION6 30 00000000
OPTION2 C8 00000000
OPTION3 83 00000000
OPTION4 B7 00000000
OPTION5 00 00000000
OPTION6 10 00000000
OPTION2 C8 00000000
OPTION3 8B 00000000
OPTION4 B7 00000000
OPTION5 00 00000000
OPTION6 10 00000000
OPTION2 C0 00000000
OPTION3 8B 00000000
OPTION4 A4 00000000
OPTION5 00 00000000
OPTION6 03 00000000
OPTION2 C0 00000000
OPTION3 8B 00000000
OPTION4 A4 00000000
OPTION5 00 00000000
OPTION6 03 00000000
OPTION2 C0 00000000
OPTION3 0F 00000000
OPTION4 B0 00000000
OPTION5 62 00000000
OPTION6 00 00000000
OPTION2 C0 00000000
OPTION3 0B 00000000
OPTION4 B0 00000000
OPTION5 62 00000000
OPTION6 00 00000000
8t
EDIT : 67E
1-7
SPECIFICATIONS
General
Power : 200~240V, 50/60Hz
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 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
Input level : VIDEO IN (SCART, RCA type)
Output level : VIDEO OUT (SCART type)
Signal to noise ratio : More than 43 dBm
:
:
:
1.0 Vp-p, 75 ohm, unbalanced
1.0 Vp-p, 75 ohm, unbalanced
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 Afilter)
• Design and specifications are subject to change without notice.
:Hi-Fi Model only
1-8
SECTION 2 CABINET & MAIN CHASSIS
Timer C.B.A
Housing & Deck Ass'y
Cassette T ape
(Upside Down)
Main C.B.A
SERVICE METHOD
Electrical Part
(1)Re-assembly Flow for service like Fig. 2-1
Timer C.B.A
Main C.B.A
Housing & Deck
Assembly
(2)To check and replace Electrical parts
2 Re-assemble the unit according to No.1) Re-assembly Flow.
3 Place the unit like Fig. 2-1
4 Check and replace Electrical parts.
NOTE :
1 Insert Video Cassette Tape inversely like Fig. 2-1 to check and replace defective parts.
2 In disassembling and reassembling, be careful not to damaged CST switch.
(Positioned Upside Down)
Fig.2-1
2-1
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
S
A/V
W502
DISPLAY(DOT,CLK)
SECTION 3 ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT
: Measurement point
: Adjustment point
3-1
ELECTRICAL ADJUSTMENT PROCEDURES
V.Out
H/SW(W501,W502)
OSCILLOSCOPE
CH1 CH2
V.out
H/SW
(W501, W502)
1. Servo Adjustment
1) PG Adjustment
• Test Equipment
a) OSCILLOSCOPE
b) PALTEST TAPE (VHS SP)
c) JIG REMOCON (AUTO PG SETTING)
• Adjustment And Specification
MODE
PLAY
MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION
V.Out
H/SW(W501, W502)
6.5 ± 0.5H
• 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
3-2
ELECTRICAL ADJUSTMENT PROCEDURES
H/SW
Composite
VIDEO
6.5H(416us)
• 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.
3-3
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power Circuit(SMPS)
(1) No 5.3VA.
No 5.3VA.
YES
Is the F101 normal?
YES
Is the BD101 normal?
YES
Is the R101 normal?
YES
Does the oscillation waveform appear at
the IC101 Pin 7?
YES
NO
NO
NO
NO
Replace the F101
(Use the same Fuse).
Replace the BD101.
Replace the R101.
Is Vcc(about 13~15V) permittable at the
IC101 Pin 3?
NO
Check or Replace the D103.
Is there DC voltage at the IC101 Pin 4?
YES
Is there about 2.5V at the IC103 Vref ?
YES
Is the D106 normal?
YES
Check the Main PCB 5.3VA Line short?
NO
NO
NO
Replace the IC102.
Replace the IC103.
Replace the D106.
3-4
7. Power Circuit(SMPS)
(2) No 12VA.(Capstan)
No 12VA.
YES
Does 5.3VA work normally? Check whether 5.3VA is out of order.
YES
Is the D109 normal?
YES
Check 12VA Line of the Main PCB short.
(3) No 12VA (CANAL, Buffer)
No 12VA.
YES
NO
NO
Replace the D109.
Is Vcc(about 13VA) put into the Q155(E)? Replace the Peripheral Circuitry of D160.
YES
Is Voltage(about 12V) put into the
Q155(C)?
YES
Check or Replace the Q155.
NO
3-5
7. Power Circuit(SMPS)
(4) No 5VT(5V)
No 5VT.(5V)
YES
Is 5.3VA put into the Q152(Q151)
collector?
YES
Is the Q163(Q162) Base “H”?
YES
Is about 4.7V put into the
Q152(Q151) Base?
YES
Check or Replace the Q152(Q151).
NO
NO
Check the µ-com Control.
Check the Q163(Q162)
whether it works normally.
3-6
2. Servo Circuit
A.
Unstable Video in PB
Mode.
Does the on screen noise
level change periodically?
YES
Do CTL pulses appear at
IC501 pin 8?
YES
Does the CFG divide
waveform appear at IC501
pin 9?
YES
Do the CTL pulses move
when TRK is operated?
YES
NO
Is the height of the CTL
Head adjusted correctly?
NO
Adjust the CTL Head.
NO
Does the Video Envelope
waveform appear at IC501
Pin 24?
YES
Replace IC501.
Replace IC501.
NO
Check A VCP IC.
3-7
B.
Drum Motor stopped.
Does 12V appear at PMC01 Pin 8?
YES
Does 2.8V appear at PMD01 Pin 12?
Check Connector and Drum Motor Ass’y.
YES
Check the Components and foil Pattern
between IC501 Pin 26 and PMC01
Pin 12 for shorts.
YES
Do DFG Pulses appear at IC501 Pin 104?
YES
Does the Drum PWM waveform
appear at IC501 Pin 107?
YES
NO
Check Power.
NO
Does Drum PWM appear at IC501 Pin
107?
NO
Do DFG Pulses appear at PMD01 Pin 3?
NO
Check Drum Monitor Ass’y.
NO
Check the Components and foil pattern
between PMC01 Pin 11 and IC501
Pin 104 for shorts.
NO
Check the Components and foil Pattern
Connected to IC501 Pin 107 PMC01
Pin 12 for shorts.
Replace IC501.
3-8
C.
Capstan Motor Stopped.
Does 13VA appear at PMC01 Pin 2?
YES
Does 2.8V appear at PMC01 Pin 9?
YES
Check Connector and Capstan
Motor Ass’y .
YES
Check the Components and foil Patterns
Connected between IC501 Pin 108 and
PMC01 Pin 9 for shorts.
YES
Does the CFG signal appear at IC501
Pin 9?
YES
Does Capstan PWM appear at IC501
Pin 108?
YES
NO
Check Power.
NO
Does PWM wave appear at IC501
Pin 108?
NO
Does the CFG signal appear at PMC01
Pin 1?
NO
Check Capstan Motor Ass’y.
NO
Check Components and foil patterns
between PMC01 Pin 7 and IC501
Pin 9 for shorts.
NO
Check the components and foil pattern
connected between IC501 Pin 108 and
PMC01 Pin 9 for shorts
Replace IC501.
3-9
3. System & Front Panel Circuit
A.
Auto stop.
Does SW30 waveform
appear at IC501 Pin 105?
YES
NO
Do Take-up reel pulses
appear at IC501 Pin 49?
YES
Change IC501.
NO
YES
Check the Drum Motor
Signal.
Do Take-up reel pulses
appear at the base of
Q514?
Replace the Take-Up Reel
Photocoupler in the
Deck(RS501).
YES
NO
Does 5.3V appear at
RS501.
NO
Check the Power.
3-10
B.
Cassette tape loading is unstable.
Is REG 14VA applied to PMC01 Pin 8?
YES
Is High signal applied to IC501 Pin 30
when inserting the CST?
NO
Check the power.
NO
Is 5.4VA applied to R544?
YES
Does Low signal occur form PMC01
Pin 10 when inserting the CST?
YES
Check the Deck Mechanism.
Check the CST SW and
peripheral circuitry.
NO
YES
Check IC501 Pins 68, 69, 70, 71.
NOTE : Auto stop may also be caused by lack of lubrication,due to dried grease or oil.
C.
Non working finction buttons.
NO
Check the power.
Is the voltage of IC501 Pin 36, 5V?
YES
Does(LED Ass’y) display change
when a function button is pressed?
YES
Replace IC501.
Replace the defective switch.
NO
Check the power.
NO
Check IC506 Pins 6~14, 17, Pins 20~23
pulse output.
Replace IC506.
3-11
4. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal
appear at the IC301 Pin 48?
YES
Is 5V applied to the IC301
Pins 18, 24, 42, 55, 72, 91?
YES
Does the Video signal
appear at the IC301 Pin 65?
YES
Does the Video signal
appear at the IC501 Pin 19?
YES
Does the Video signal
appear at the Emitter terminal of the Q307, Q308?
NO
NO
NO
NO
NO
Check the Video Input
Jack.
(Line In Jack)
Check the 5.2VT, 5.4VA
Line. (Power Circuit)
Is I2C BUS signal applied to
the IC301 Pins 68, 69?
YES
Chck the path of the signal
between the IC301 Pin 5
and IC501 Pin 17.
Does the 12VT, 5.4VA
appear at the Emitter terminal of the Q307, Q308.
NO
NO
Check the System Circuit.
(Refer to ‘SYSTEM I
CHECK Trouble Shooting’)
Check C316. (AGC)
Replace the IC301.
YES
2
C BUS
YES
Replace the Q307, Q308.
3-12
Check the 12VT, 5.4VA
Line. (Power Circuit)
3. Y/C CIRCUIT
(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,
Is 5.2VT, 5.4VA applied to the
IC301 Pins 24, 42, 55, 72, 91?
YES
Is the I2C Bus siganl applied
to the IC301 Pins 68, 69 ?
YES
Does the normal RF signal
appear at the IC301 Pin 78?
YES
NO
NO
NO
Check the line of the 5.2V
Line. (Power Circuit)
Refer to ‘SYSTEM I2C BUS
CHECK Trouble Shooting’.
Is the V.H.S/W signal
applied to the IC301 Pin 70?
YES
Is V.H.S/W “H” about 3.4V
at the IC301 Pin 70?
YES
Clean the Drum.
NO
NO
NO
Check the System Circuit.
(IC501 Pin 105)
Check the V.H.S/W level.
(Check R303, R304)
Replace the IC301.
Does the Y(Luminance) RF
signal appear at the IC301
Pin 76?
YES
Is the Y(Luminance) Video
waveform showed up at
theIC301 Pin 43?
YES
Replace the IC301.
NO
NO
Check the path of the
Y(Luminance) RF signal.
(Check the C312)
Check the path of the
Y(Luminance) RF signal.
(Check C327)
YES
YES
3-13
3. Y/C CIRCUIT
(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,
Is 5.2VT/5.4VA applied to the
IC301 Pins 24, 42, 55, 72, 91.
YES
Is the Color Rotary signal
applied to the IC301
Pin 70?
YES
Is Color Rotary “H”
about 3.4V?
YES
Does the Color signal
appear at the IC301
Pin 25 ?
YES
NO
NO
NO
NO
Check the line of the 5.2VT/
5.4VA Line. (Power Circuit)
Check the Color Rotary
Circuit. (IC501 pin 99 )
Check the Color Rotary
level. (Check the R303)
Does the X301(4.43MHZ)
oscillate?
Does the Color signal
appear at the IC301 Pin 21?
NO
NO
Replace the X301.
Check the Color Pass.
Replace the IC301.
YES
Replace the IC301.
3-14
3. Y/C CIRCUIT
(4) When the Video signal doesn’t appear on the screen in REC Mode,
Is the EE signal normal?
YES
Is 5.2VT/5.4VA applied to the
IC301 Pins 24,42,55,72,91?
YES
Does PB Mdoe operate
normally?
YES
Does the RF signal appear
at the IC301 Pin 78?
YES
NO
NO
NO
NO
Check EE Mode.
Check the line of the 5.2VT/
5.4VA Line.(Power Circuit)
Check PB Mode.
Is the REC ‘H’ signal
(about 4V) applied to the
IC301 Pin 80?
YES
Check REC Luminance
Pass & Color Pass.
NO
YES
Check the System of REC
‘H’. (the IC501 Pin 47
/ the D301)
Replace the IC301.
Does the REC RF signal
appear at the IC301
Pins 88,89,94,95?
YES
Check the Drum &
Drum Connector
NO
Check the circuit of the
IC301 Pins 85, 86.
YES
3-15
5. Tuner/IF circuit
(1) No picture on the TV screen
No picture on the
TV screen
YES
Does the Video signal at
the TU701 Pin24?
YES
NO
Is +30VT applied to
TU701 Pin 16?
YES
Is +5VT applied to
TU701 Pin 13?
YES
Does the Clock signal
appear at TU701 Pin 11?
YES
Does the data signal
appear at TU701 Pin 12?
YES
Replace Tuner
NO
NO
NO
NO
Check 33VT line.
Check 5VT line.
Check the liC Clock
signal of µ-com Pin 59.
Check the liC Data signal
of µ-com Pin 60.
Does Sync appear at
IC501 Pin111?
YES
Check the signal flow from
IC501 Pin19 to JK901
Pin19.
NO
Check the signal flow
from TU701 Pin 24 to
IC301 Pin 67.
3-16
(2) No sound (Mono Model)
No sound
YES
Check the Vcc of IC301 Pin 18.
YES
Check the Tuner Audio signal
at IC301 Pin 13.
YES
Check the Audio signal at IC301 Pin 11.
YES
Check the signal flow from IC301
pin 11 to IC901 Pin 6.
NO
NO
NO
Check 5VT power.
Chekc the signal flow from TU701
Pin21 to IC301 Pin 13.
Replace IC301.
3-17
(3) No sound (Hi-Fi Model)
No sound
YES
Check the Vcc of IC751 Pins 1, 19, 33.
YES
Check the Tuner SiF signal at IC751 Pin 2.
YES
Check the oscillator of IC751 Pins 5, 6.
YES
Check the Audio of IC751 Pins 30, 31.
YES
Check the Audio of IC801 Pins 2, 3.
YES
NO
NO
NO
NO
NO
Check 5V power.
Check the Tuner Audio of TU701 Pin 21.
Replace X751.
Check the IIC Clock and Data at
IC751 Pins 12, 13.
Check the signal flow from IC751
Pins 30, 31 to IC801 Pins 2,3.
Check the Audio of IC801 Pins 18, 19.
YES
Check the signal flow from IC801
pins 18, 19 to JK901 Pins 1, 3.
NO
3-18
Check the IIC Clock and Data at
IC801 Pins 42, 43.
6. Hi-Fi Circuit (Hi-Fi Model)
A.
Hi-Fi Playback.
No sound
Check the Hi-Fi Selection
Switch and the Tape quality.
YES
Is the RF Envelope at
IC801 Pin 44 over 2Vp-p?
YES
Check IC801 Pin 42(Data),
Pin 43(Clock).
YES
Do Audio signals appear at
IC801 Pin 16(L-CH),
17(R-CH)?
YES
NO
NO
YES
NO
Check the Vcc of
IC801.(Pins 34, 40)
YES
Is the Head switching signal
IC802 Pin 41 O.K?
YES
Check the connection at
P3D01 if good then
Replace IC801.
Check Ports of µ-COM.
NO
NO
Check power.
Check IC501 Pin 23.
(Audio head switch 25)
Check the Signal path
of Audio Output.
Replace IC801.
3-19
B.
Hi-Fi REC.
It is impossible to record and playback
Hi-Fi Audio signal.
YES
Check Vcc of IC801. (Pins 34,40)
YES
Check IC801 Pin 42(Data),Pin 43(CLOCK).
YES
Do Audio signals appear at IC801
Pins 16, 17?
YES
Do FM Audio signals appear at IC801
Pin 36?
YES
Check the Contact Points of Drum
Connector if good then Replace the Drum.
NO
Check Power.
NO
Check ports of µ-COM.
NO
Check Audio input signal of IC801
Pins 2, 3(TU.A.), 6, 7(Scart 1)
NO
Replace IC801.
3-20
SECTION 4 MECHANISM
CONTENTS
DECK MECHANISM PARTS
LOCATIONS
• Top View ......................................................4-1
• Bottom View ...............................................4-1
DECK MECHANISM
DISASSEMBLY
1. Drum Assembly.........................................4-2
2. Plate Top ...................................................4-4
3. Holder Assembly CST...............................4-4
4. Opener Door .............................................4-4
5. Bracket Assembly L/D Motor.....................4-4
6. Gear Assembly Rack F/L..........................4-4
7. Arm Assembly F/L.....................................4-4
8. Lever Assembly S/W.................................4-4
9. Arm Assembly Cleaner..............................4-5
10.Head F/E...................................................4-5
1 1.Base Assembly A/C Head.........................4-5
12.Brake Assembly T .....................................4-6
13.Brake Assembly RS..................................4-6
14.Arm Assembly T ension..............................4-6
15.Reel S / Reel T..........................................4-6
16.Base Assembly P4....................................4-7
17.Opener Lid ................................................4-7
18.Arm Assembly Pinch.................................4-7
19.Lever T/up / Arm T/up ...............................4-7
20.Belt Capstan/Motor Capstan.....................4-8
21.Lever F/R ..................................................4-8
22.Clutch Assembly D35................................4-8
23. Brake Assembly Capstan.........................4-8
24.Gear Drive/Gear Cam...............................4-9
25.Gear Sector...............................................4-9
26.Plate Slider................................................4-9
27.Lever Tension............................................4-9
28.Lever Spring..............................................4-9
29.Gear Assembly P2/
Gear Assembly P3 ..................................4-10
30.Base Assembly P2/
Base Assembly P3 ..................................4-10
31.Base Loading ..........................................4-11
32.Base Tension...........................................4-11
33.Arm Assembly Idler .................................4-11
DECK MECHANISM ADJUSTMENT
• Tools and Fixtures for Service ...............4-12
1. Mechanism Alignment Position Check ....4-13
2. Preparation for Adjustment......................4-14
3. Checking Torque.....................................4-14
4. Guide Roller Height Adjustment ..............4-15
4-1. Preliminary Adjustment....................4-15
4-2. Precise Adjustment..........................4-15
5. Audio/Control (A/C) Head Adjustment ....4-16
5-1. Preliminary Adjustment....................4-16
5-2. Confirmation of Tape Path between
Pinch Roller and Take-up Guide .....4-17
5-3. Precise Adjustment(Azimuth Adjustment)
.........................................................4-17
6. X-Value Adjustment.................................4-17
7. Adjustment after Replacing Drum Assembly
(Video Heads).........................................4-18
8. Check the Tape Travel after Reassembling
Deck Mechanism.....................................4-18
8-1. Checking Audio and RF Locking Time
during Playback after CUE or REV
.........................................................4-18
8-2. Checking for Tape Curling or
Jamming ..........................................4-18
MAINTENANCE/INSPECTION
PROCEDURE
1. Check before starting Repairs ................4-19
2. Required Maintenance............................4-20
3. Scheduled Maintenance ..........................4-20
4. Supplies Required for Inspection and
Maintenance............................................4-20
5. Maintenance Procedure..........................4-20
5-1. Cleaning...........................................4-20
5-2. Greasing ..........................................4-21
MECHANISM TROUBLESHOOTING
GUIDE
1. Deck Mechanism .....................................4-23
2. Front Loading Mechanism.......................4-26
EXPLODED VIEWS
1. Front Loading Mechanism Section .........4-28
2. Moving Mechanism Section (1) ...............4-29
3. Moving Mechanism Section (2) ...............4-30
DECK MECHANISM PARTS LOCATIONS
20
24
23
20
24
22
21
29
30
29
30
25
32
27
26
28
• Top View
2
7
10
1
31
14
15
8
• Bottom View
Procedure
Starting
No.
2 3 Holder Assembly CST Chassis Hole A-2 T
2 4 Opener Door Chassis Hole A-2 T
6
3
4
9
5
11
18
16
17
19
19
12
33
13
15
2,3,4 6 Gear Assembly Rack F/L 1 Hook, Chassis Hole A-2 T
2,3,4,6 7 Arm Assembly F/L Chassis Hole A-2 T
2,3 12 Brake Assembly T 1 Hook A-4 T
2,3 13 Brake Assembly RS 1 Hook A-4 T
2,3 14 Arm Assembly Tension 2 Hook A-4 T
2,3,12,13, 15 Reel S/Reel T A-4 T
14
17 18 Arm Assembly Pinch Shaft A-5 T
17 19 Lever T/Up / Arm T/Up 1 Hook A-5 T
17,18 20
20, 21 22 Clutch Assembly D35 Washer A-6 B
20,21,23, 26 Plate Slider Shaft Guide A-7 B
24,25
20,21,23, 27 Lever Tension 1 Hook A-7 B
24,25,26
2,3,14,20, 28 Lever Spring Locking Tab A7 B
21,25,23,
24,26
25 29
2,3,14,25, 30
29
2,3,14,25, 31 Base Loading 1 Screw A-9 T
29
2,3,14 32 Base Tension Chassis Embossing A-9 B
2,3,20,21, 33 Arm Assembly Idler Locking T ab A-9 T
22
1 Drum Assembly 3 Screw A-1 T
2 Plate Top 2 Hook A-2 T
5 Bracket Assembly 3 Hook A-2 T
L/D Motor
8 Lever Assembly S/W 1 Hook A-2 T
9 Arm Assembly Cleaner Chassis Embossing A-3 T
10 Head F/E Chassis Embossing A-3 T
11 Base Assembly A/C Head 1 Screw A-3 T
16 Base Assembly P4 Chassis Embossing A-5 T
17 Opener Lid Chassis Embossing A-5 T
Belt Capstan/Motor Capstan
21 Lever F/R Locking Tab A-6 B
23 Brake Assembly Capstan Locking Tab A-6 B
24 Gear Drive/Gear Cam Washer/Hook A-7 B
25 Gear Sector 1 Hook A-7 B
Gear Assembly P2/Gear Assembly P3
Base Assembly P2/Base Assembly P3
Part Fixing Type
3 Screw A-6 B
Boss A-8 B
Chassis Slot A-8 B
Fig-
ure
View
NOTE : When reassembly perform the
1) When reassembling, confirm Mechanism and Mode
Switch Alignment Position (Refer to Page 4-13)
2) When disassembling, the Parts for Starting No. Should
be removed first.
4-1
procedure in the reverse order.
T:Top, B:Bottom
DECK MECHANISM DISASSEMBLY
(S3)
(S2)
(S2)
(S3)
(A)
Stator
Carbon Brush
Drum Motor
Rotor
Drum Sub Assembly
Drum FPC
(S1)
(S1)
(S1)
Holder FPC
H1
H2
(Fig. A-1-1)
Fig. A-1
1. Drum Assembly (Fig. A-1-1)
1) Unplug the Drum FPC Connector.
2) Remove three Screws(S1) on bottom side and separate
the Drum assembly.
3) Unhook (H1), (H2) and separate the Holder FPC and
Cap FPC.
1-1. Drum Motor
1) Remove two Screws(S2) and disassemble the Stator of
the Drum Motor.
2) Remove two Screws(S3) and separate the Rotor of the
Drum Motor from the Drum Sub assembly.
NOTE
When reassembling, confirm (A) portion of the Drum Sub
assembly whether the Carbon Brush is in there or not.
(Fig. B-1)
Cap FPC
Drum FPC
Holder FPC
Figure in the opposite direction
4-2
DECK MECHANISM DISASSEMBLY
(B)
(E)
(C1)
(C)
Plate Top
Arm Assembly F/L
Spring Lever S/W
Gear Assembly Rack F/L
Chassis
Opener Door
Bracket Assembly L/D Motor
Holder Assembly CST
(B')
(C')
(D)
(E')
(H6)
(A)
(B)
Lever Assembly S/W
(H8)
(Fig. A-2-1)
(Fig. A-2-2)
(Fig. A-2-6)
(Fig. A-2-7)
(Fig. A-2-4)
4-3
(Fig. A-2-5)
Fig. A-2
(Fig. A-2-3)
DECK MECHANISM DISASSEMBLY
(B')
(C')
(C)
(B)
2. Plate Top (Fig. A-2-1)
1) Pull the (B) portion of the Plate Top back in direction of
arrow and separate the right side of it.
2) pull the (B’) portion of the Plate Top back in direction of
arrow and separate the left side of it.
(Used tools : (-) type driver, anything tool with sharp
point or flat point.)
NOTE
(1) When reassembling, push the Plate Top after alignment
the two position(C), (C’) as below Fig.
3. Holder Assembly CST (Fig.A-2-2)
1) Move the Holder Assembly CST in direction of arrow and
separate the left side of it first through the (D) position of
the Chassis.
2) Unhook three Hooks(H3, H4, H5) on bottom side of the
Chassis, lift up the Bracket Assembly L/M and disassemble the Bracket Assembly L/D Motor.
(H4)
(H3)
(H5)
Bracket assembly L/M
6. Gear Assembly Rack F/L (Fig. A-2-5)
1) Move the Gear Assembly Rack F/L in direction of
arrow(A) and unhook the Hook(H6) pulling back in front.
2) Separate the Gear Rack F/L in direction of arrow(B).
NOTE
When reassembling, align the gear part of the Gear
Assembly Rack F/L with the Gear Drive as below Fig.
Gear Rack F/L
Holder assembly CST
(D)
Chassis
2) Disassemble the right side of the Holder Assembly CST
from each guided hole of the Chassis.
NOTE
When reassembling, insert the (E) part of the Holder
Assembly CST in the (E’) hole of the Chassis first and
assemble the left side of it.
4. Opener Door (Figure. A-2-3)
1) Turn the Opener Door clockwise and remove it through
the guide hole of the Chassis.
5. Bracket Assembly L/D Motor (Fig. A-2-4)
1) Unplug the Connector(C1).
Gear Drive
7. Arm Assembly F/L (Fig. A-2-6)
1) Move the Arm Assembly F/L in direction of arrow and
separate the left side of it first.
2) Disassemble the Arm Assembly F/L from each guided
hole of the Chassis.
8. Lever Assembly S/W(Fig. A-2-7)
1) Unhook the Hook(H8) in the left side of the Chassis and
remove the Lever Assembly S/W.
Chassis
(H8)
4-4
DECK MECHANISM DISASSEMBLY
(A)
Arm Assembly
Cleaner
Base Assembly A/C Head
(S4)
Head F/E
(A)
Chassis
(Fig. A-3-2)
(Fig. A-3-1)
(Fig. A-3-3)
Fig. A-3
9. Arm Assembly Cleaner (Fig. A-3-1)
1) Breakaway the (A) portion as Fig. A-3-1 from the
embossing of the Chassis, turn the Arm assembly
Cleaner to clockwise direction and lift it up.
11. Base Assembly A/C Head (Fig. A-3-3)
1) Remove the Screw(S4) and lift the Base Assembly A/C
Head up.
10. Head F/E (Fig. A-3-2)
1) Breakaway the (A) portion of the Head F/E from the
embossing of the Chassis, turn it to counterclockwise
direction and lift it up.
4-5
DECK MECHANISM DISASSEMBLY
Brake Assembly T
Spring TB
(H9)
Reel T
Brake Assembly RS
Spring RS
Arm Assembly Tension
Spring Tension
Reel S
Base Tension
(H11)
(H12)
Chassis
(H10)
Spring TB
Spring RS
Color (Black)
Spring Tension
(Fig. A-4-3)
(Fig. A-4-4)
(Fig. A-4-1)
(Fig. A-4-4)
(Fig. A-4-2)
Fig. A-4
12. Brake Assembly T (Fig. A-4-1)
1) Unhook the Spring TB from the Hook(H9) of the Chassis.
2) Lift the Brake Assembly T up.
13. Brake Assembly RS (Fig. A-4-2)
1) Unhook the Spring RS from the Hook(H10) of the
Chassis.
2) Lift the Brake Assembly T up.
14. Arm Assembly Tension (Fig. A-4-3)
1) Unhook the Spring Tension from the Hook(H11) of the
Arm Assembly Tension.
2) Unhook the Hook(H12) of the Base Tension and lift the
Arm Assembly Tension up.
NOTE
Difference for Springs
15. Reel S / Reel T (Fig. A-4-4)
1) Difference for Reel S / Reel T
Reel S R eel T
4-6
DECK MECHANISM DISASSEMBLY
Opener Lid
Arm
Assembly
Pinch
Base Assembly P4
Arm T/up
Lever T/up
(A)
(B)
(C)
(C)
(H13)
(B)
(H13)
Chassis
(Fig. A-5-3)
(Fig. A-5-2)
(Fig. A-5-1)
Fig. A-5
16. Base Assembly P4 (Fig. A-5-1)
1) Breakaway the (A) portion of the Base Assembly P4 from
the embossing of the Chassis.
2) Turn the Base Assembly P4 to counterclockwise direction
and lift it up.
17. Opener Lid (Fig. A-5-2)
1) Breakaway the (B) portion of the Opener Lid from the
embossing of the Chassis.
2) Turn the Opener Lid to clockwise direction and lift it up.
18. Arm Assembly Pinch (Fig. A-5-3)
1) Lift the Arm Assembly Pinch up.
(Fig. A-5-4)
(Fig. A-5-5)
NOTE
When reassembling, confirm the (C) portion of the Arm
Assembly Pinch is inserted to the Chassis hole correctly as
Fig.
19. Lever T/up (Fig. A-5-4)/
Arm T/up (Fig. A-5-5)
1) Unhook the Hook(H13) of the bottom Chassis and lift the
Lever T/up up.
2) Lift the Arm T/up up.
4-7
DECK MECHANISM DISASSEMBLY
Chassis
(S5)
Belt Capstan
Motor Capstan
Washer(W1)
Lever F/R
Clutch Assembly D35
Brake Assembly Capstan
(L1)
(L2)
(L1)
(Fig. A-6-1)
(Fig. A-6-2)
(Fig. A-6-4)
(Fig. A-6-5)
(Fig. A-6-3)
Fig. A-6
20. Belt Capstan (Fig. A-6-1)/
Motor Capstan (Fig. A-6-2)
1) Remove the Belt Capstan.
2) Remove the three Screws(S5) on bottom Chassis and lift
the Motor Capstan up.
21. Lever F/R (Fig. A-6-3)
1) Unlock the Locking Tab(L1) as Fig. A-6-3 and lift the
Lever F/R up.
22. Clutch Assembly D35 (Fig. A-6-4)
1) Remove the Washer(W1) and lift the Clutch Assembly
D35 up.
23. Brake Assembly Capstan
(Fig. A-6-5)
1) Pull the Locking Tab(L2) back in direction of arrow and lift
it up.
4-8
DECK MECHANISM DISASSEMBLY
Gear Drive
Washer (W2)
Gear Cam
Plate Slider
Lever Tension
Lever spring
Base Loading
Gear Sector
(L3)
(H15)
(H16)
(H14)
(A)
Chassis
Gear Drive Hole(C)
Gear Cam Hole(B)
Gear Drive Hole(A)
(Fig. A-7-2)
(Fig. A-7-3)
(Fig. A-7-1)
(Fig. A-7-4)
(Fig. A-7-5)
(Fig. A-7-6)
Fig. A-7
24. Gear Drive (Fig. A-7-1)/
Gear Cam (Fig. A-7-2)
1) Remove the Washer(W2) and lift the Gear Drive up.
2) Unhook the Hook(H14) of the Gear Cam and lift the Gear
Cam up.
NOTE
When reassembling, align the Gear Drive Hole(A) and the
Gear Cam Hole(B) in a straight line after the Gear Drive
Hole(C) is aligned with the Chassis Hole as Fig.
25. Gear Sector (Fig. A-7-3)
1) Unhook the Hook(H15) of the Base Loading on bottom
Chassis and lift the Gear Sector up.
4-9
26. Plate Slider (Fig. A-7-4)
1) Just lift the Plate Slider up.
27. Lever Tension (Fig. A-7-5)
1) Unhook the (A) portion of the Lever Tension from the
Hook(H16) of the Chassis.
2) Turn the Lever Tension to counterclockwise direction and
lift it up.
28. Lever Spring (Fig. A-7-6)
1) Unlock the Locking Tab(L3) of the bottom Chassis and lift
the Lever Spring up.
DECK MECHANISM DISASSEMBLY
Gear Assembly P3
Gear Assembly P2
Base Assembly P2
Base Assembly P3
(A)
(B)
Chassis
Gear Assembly P2 Hole
Gear Sector Hole(A)
Plate Slider Hole(B)
Lever Spring Boss
Gear Assembly P3 Hole
(Fig. A-8-2)
(Fig. A-8-4)
Fig. A-8
(Fig. A-8-3)
(Fig. A-8-1)
29. Gear Assembly P2 (Fig. A-8-1)/
Gear Assembly P3 (Fig. A-8-2)
1) Just lift the Gear Assembly P2 up.
2) Just lift the Gear Assembly P3 up.
NOTE
When reassembling, align the two holes of the Gear
Assembly P2 and P3 in a straight line after confirmation
whether the Gear Sector Hole(A) and the Plate Slider
Hole(B) are aligned or not as Fig.
30. Base Assembly P2 (Fig. A-8-3)/
Base Assembly P3 (Fig. A-8-4)
1) Move the Base Assembly P2 in direction of arrow(A)
along the guide hole of the Chassis and disassemble it
on bottom side.
2) Move the Base Assembly P3 in direction of arrow(B)
along the guide hole of the Chassis and disassemble it
on bottom side.
4-10
DECK MECHANISM DISASSEMBLY
(A)
(B) (C)
(S7)
Arm Assembly Idler
Base Loading
Base Tension
Chassis
(D)
(Fig. A-9-2)
(Fig. A-9-1)
(Fig. A-9-3)
Fig. A-9
31. Base Loading (Fig. A-9-1)
1) Remove the Screw(S7).
2) Lift the Base Loading up.
32. Base Tension (Fig. A-9-2)
1) Breakaway the (A) portion of the Base Tension from the
embossing of the Chassis.
2) Turn the Base Tension to counterclockwise direction and
lift it up.
4-11
33. Arm Assembly Idler (Fig. A-9-3)
1) Make narrower the two parts, (B) and (C), as Fig. A-9-3.
2) Lift the Arm assembly Idler up.
NOTE
When disassembling, be careful not to be caught the (D) part
by the Chassis as Fig.
DECK MECHANISM ADJUSTMENT
SRK
VIDEO
CASSETTE
TORQUE
METER
VHT-303
S
R
K
-
V
H
T
-
S
S
R
K
-
V
H
T
-
T
300
250
200
150
50
0
300
250
200
150
50
0
100
• Tools and Fixfures for Service
1. Cassette Torque Meter
PUJ42881 NTSC:MHP
1.
1.
2. Alignment Tape 3. Torque Gauge
PAL:MHPE
4. Post Height Adjusting Driver
(Roller driver)
PTU94002
3. PUJ48075-2
3.
4-12
DECK MECHANISM ADJUSTMENT
Gear Cam
Gear Drive
(A)
Mode S/W
(B)
1. Mechanism Alignment Position Check
Purpose:To determine if the Mechanism is in the correct position, when a Tape is ejected.
Test Equipment/ Fixture
• Blank tape
1) Turn the Power S/W on and eject the Cassette by pressing the Eject Button.
2) Remove the Top Cover and Plate Assembly Top, visually check if the Gear Cam Hole is aligned with the
Chassis Hole as below Fig. C-2.
3) IF not, rotate the Shaft of the Loading Motor to either
clockwise or counterclockwise until the alignment is as
below Fig. C-2.
Test Conditions (Mechanism
Condition)
• Eject Mode (with Cassette ejected)
CHECK DIAGRAM
Check Point
• Mechanism and Mode Switch Position
4) Remove the Screw which fixes the Deck Mechanism and
Main Frame and confirm if the Gear Cam is aligned with
the Gear Drive as below Fig. C-1(A).
5) Confirm if the Mode S/W on the Main P.C.Board is
aligned as below Fig. C-1(B).
6) Remount the Deck Mechanism on the Main P.C.Board
and check each operation.
BOTTOM VIEW
TOP VIEW
L/D Motor Assembly
(A')
(B')
Fig. C-1
Gear Cam
Chassis Hole
Fig. C-2
Gear Cam (o) and Gear Drive (o) groove alignment
(B)
Gear Cam Hole
(A)
Gear Drive Hole
4-13
DECK MECHANISM ADJUSTMENT
SRK
VIDEO
CASSETTE
TORQUE
METER
VHT-303
S
R
K
-
V
H
T
-
S
S
R
K
-
V
H
T
-
T
300
250
200
150
50
0
300
250
200
150
50
0
100
2. Preparation for Adjustment (To set the
Deck Mechanism of the loading state
without inserting a cassette tape).
1) Unplug the power cord from the AC outlet.
2) Disassemble the Top Cover and Plate Assembly Top.
3) Plug the power cord into the AC outlet.
4) Turn the power S/W on and push the Lever Stopper of
the Holder Assembly CST to the back for loading the
cassette without tape.
Cover the holes of the End Sensors at the both sides of
the Chassis to prevent a light leak.
Then the Deck Mechanism drives to the Stop Mode.
In this case, the Deck Mechanism can accept inputs of
each mode, however the Rewind and Review operation
can not be performed for more than a few seconds
because the Take-up Reel Table is in the Stop State
and can not be detected the Reel Pulses.
3. Checking Torque
Purpose: To insure smooth transport of the tape during each mode of operation.
If the tape transport is abnormal, then check the torque as indicated by the chart below.
Test Equipment/ Fixture
• Torque Gauge(600g/cm ATG)
• Torque Gauge Adaptor
• Cassette Torque Meter
Item
• Play (FF) or Review (REW) Mode
Mode
Test Conditions
(Mechanism Condition)
Test Equipment
Checking Method
• Perform each Deck Mechanism mode without
inserting a cassette tape(Refer to above No.2
Preparation for Adjustment).
• Read the measurement of the Take-up or Supply
Reels on the Cassette Torque Meter(Fig. C-3-2).
• Attach the Torque Gauge Adaptor to the Torque
Gauge and then read the value of it(Fig. C-3-1).
Measurement Reel
Measurement Values
Fast Forward Torque
Rewind Torque
Play Take-Up Torque
Review Torque
Fast Forward
Rewind
Play
Review
NOTE:
The values are measured by using a Torque Gauge and
Torque Gauge Adaptor with the Torque Gauge affixed.
Torque Gauge
Torque Gauge
Adaptor
Reel Table
Cassette Torque Gauge
Cassette Torque Gauge
Cassette Torque Meter
Cassette Torque Meter
NOTE:
The torque reading to measure occurs when the tape
abruptly changes direction from Fast Forward to Rewind
Mode, when quick braking is applied to both Reels.
• Cassette Torque Meter • Torque Gauge (600g.cm ATG)
Take-Up Reel
Supply Reel
Take-Up Reel
Supply Reel
More than 400g/cm
More than 400g/cm
40~100g/cm
120~210g/cm
Fig. C-3-2Fig. C-3-1
4-14
DECK MECHANISM ADJUSTMENT
4.Guide Roller Height Adjustment
Purpose: To regulate the height of the tape so that the bottom of the tape runs along the
tape guide line on the Lower Drum.
4-1. Preliminary Adjustment
Test Equipment/ Fixture
• Post Height Adjusting Driver
Test Conditions (Mechanism Condition)
• Play or Review Mode
Adjustment Procedure
1) Confirm if the tape runs along the tape guide line of the
Lower Drum.
2) If the tape runs the bottom of the guide line, turn the
Guide Roller Height Adjustment Screw to clockwise
direction.
3) If it runs the top, turn to counterclockwise direction.
4) Adjust the height of the Guide Roller to be guided to the
guide line of the Lower Drum from the starting and ending point of the Drum.
4-2. Precise Adjustment
Test Equipment/Fixture
• Oscilloscope
• Alignment T ape
• Post Height Adjusting
Driver
Test Equipment Connection Points
• CH-1:PB RF Envelope
• CH-2:NTSC: SW 30Hz
PAL: SW 25Hz
• Head Switching Output
Point
• RF Envelope Output
Point
Adjustment Point
• Guide Roller Height Adjustment
screws on the Supply and Take-Up
Guide Rollers.
ADJUSTMENT DIAGRAM
Fig. C-4-1
Test Conditions VCR(VCP) State
• Play an Alignment Tape
• Guide Roller Height
Adjustment Screws
Waveform Diagrams
P2 POST
ADJUSTMENT
Guide Roller Height
Adjustment screw
Upper Flange
Guide Roller
Retaining Screw
Adjustment Point
Adjustment Procedure
1) Play an Alignment Tape after connecting the probe of the
Oscilloscope to the RF Envelope Output Test Point and
Head Switching Output Test Point.
2) Tracking Control(in PB Mode) : Center Position(When
this adjustment is performed after the Drum Assembly
has been replaced, set the Tracking Control so that the
RF Output is Maximum).
3) Height Adjustment Screw : Flatten the RF waveform.
(Fig. C-4-2)
4) Turn(Move) the Tracking Control(in PB Mode) clockwise
and counterclockwise.(Fig. C-4-3)
5) Check that any drop of RF Output is uniform at the start
and end of the waveform.
NOTE
If the adjustment is excessive or insufficient the tape will
jam or fold.
4-15
P3 POST
ADJUSTMENT
Turn the Roller Guide Height
Adjustment Screw slightly
to flatten the waveform.
Fig. C-4-2
Tracking Control at center
Turn(Move) the Tracking
Control to both directions
Fig. C-4-3
Connection Diagram
RF ENVELOPE OUTPUT TEST POINT
HEAD SWITCHING OUTPUT TEST
POINT
OSCILLOSCOPE
DECK MECHANISM ADJUSTMENT
10.9
5. Audio/Control (A/C) Head Adjustment
Purpose: To insure that the tape passes accurately over the Audio and Control Tracks in
exact alignment of the both Record and Playback Modes.
5-1. Preliminary Adjustment (Height and Tilt Adjustment)
Perform the Preliminary Adjustment, when there is no Audio Output Signal with the Alignment Tape.
Test Equipment/ Fixture
• Blank Tape
• Screw Driver(+) Type 5mm
Test Conditions (Mechanism Condition)
• Play the blank tape
Adjustment Procedure/Diagrams
1) Initially adjust the Base Assembly A/C Head as shown
Fig. C-5-1 by using the Height Adjustment Screw(B).
2) Play a blank tape and observe if the tape passes accurately over the A/C Head without tape curling or folding.
3) If folding or curling is occured then adjust the Tilt
Adjustment Screw(C) while the tape is running to resemble Fig. C-5-3.
Adjustment Point
• Tilt Adjustment Screw(C)
• Height Adjustment Screw(B)
• Azimuth Adjustment Screw(A)
4) Reconfirm the tape path after Playback about 4~5 seconds.
NOTE
Ideal A/C head height occurs when the tape runs between
0.2~0.25mm above the bottom edge of the A/C Head core.
A/C Head
P4
Tape
0.2~0.25mm
Tape
Fixed Screw
Azimuth Adjustment
Screw(A)
A/C Head Base
Fig. C-5-1
X-Value Adjustment
Hole
A/C Head Assembly
Fig. C-5-2
Fig. C-5-3
Tilt Adjustment
Screw(C)
Height Adjustment
Screw(B)
4-16
DECK MECHANISM ADJUSTMENT
5-2. Confirm that the tape passes smoothly
between the Take-up Guide and Pinch
Roller(using a mirror or the naked eye).
1) After completing Step 5-1.(Preliminary Adjustment), check
that the tape passes around the Take-up Guide and Pinch
Roller without folding or curling at the top or bottom.
(1) If folding or curling is observed at the bottom of the
Take-up Guide then slowly turn the Tilt Adjustment
Screw(C) in the clockwise direction.
5-3. Precise Adjustment (Azimuth adjustment)
Test Equipment/ Fixture
• Oscilloscope
• Alignment T ape(SP)
• Screw Driver(+) Type 5mm
Connection Point
• Audio output jack
Adjustment Procedure
1) Connect the probe of the oscilloscope to Audio Output
Jack.
2) Alternately adjust the Azimuth Adjustment Screw(A) and
the Tilt Adjustment Screw(C) for maximum output of the
1KHz and 7KHz segments, while maintaining the flattest
envelope differential between the two frequencies.
(2) If folding or curling is observed at the top of it then
slowly turn the Tilt Adjustment Screw(C) in the
counterclockwise direction.
NOTE:
Check the RF envelope after adjusting the A/C Head, if the
RF waveform differs from Fig. C-5-4, performs Precise
Adjustment to flat the RF waveform.
Test Conditions
(Mechanism Condition)
• Play an Alignment Tape
1KHz, 7KHz Sections
1KHZ
A:Maximum
Adjustment Point
• Azimuth Adjustment Screw(A)
• Height Adjustment Screw(B)
7KHZ
B:Maximum
Fig. C-5-4
6. X-Value Adjustment
Purpose: To obtain compatibility with the other VCR(VCP) Models.
Test Conditions
(Mechanism Condition)
• Oscilloscope
• Alignment T ape(SP only)
• Screw Driver(+) Type 5mm
• CH-1: PB RF Envelope
• CH-2: NTSC: SW 30Hz
PAL: SW 25Hz
• Head Switching Output
Test Point
• RF Envelope Output Test
Point
Adjustment Procedure
1) Release the Automatic Tracking to run long enough for
tracking to complete it’s cycle.
2) Loosen the Fixed Mounting Screw and move the Base
Assembly A/C Head in the direction as shown in the diagram to find the center of the peak that allows for the maximum waveform envelope.
This method should allow the 31µm Head to be centrally
located over the 58µm tape track.
3) Tighten the Base Assembly A/C Head mounting Screw.
• Play an Alignment Tape
Adjustment Diagram
X-Value Adjustment Hole
Fixed Screw
Azimuth Adjustment
Screw(A)
Connection Diagram
RF ENVELOPE OUTPUT TEST POINT
HEAD SWITCHING OUTPUT TEST POINT
Adjustment PointConnection PointTest Equipment/ Fixture
Groove at the
Left
Height Adjustment Screw(B)
Base A/C
Right
Tilt Adjustment Screw(C)
OSCILLOSCOPE
CH-1
CH-2
4-17
DECK MECHANISM ADJUSTMENT
7. Adjustment after Replacing Drum Assembly (Video Heads)
Purpose: To correct for shift in the Roller Guide and X value after replacing the Drum.
Test Equipment/ Fixture
• Oscilloscope
• Alignment T apes
• Blank Tape
• Post Height Adjusting Driver
• Screw Driver(+) Type 5mm
Connection Point
• CH-1: PB RF Envelope
• CH-2: NTSC: SW 30Hz
PAL: SW 25Hz
• Head Switching Output
Test Point
Test Conditions
(Mechanism Condition)
• Play the Blank Tape
• Play an Alignment Tape
Adjustment Points
• Guide Roller Precise
Adjustment
• Switching Point
• Tracking Preset
• X-Value
• RF Envelope Output Test Point
Checking/Adjustment Procedure
Connection Diagram
Play a blank tape and check for tape curling or creasing around
the Roller Guide. If there is a problem then follow the procedure
4. "Guide Roller Height" and 5. "Audio Control(A/C) Head
Adjustment".
RF ENVELOPE OUTPUT TEST POINT
HEAD SWITCHING OUTPUT TEST
POINT
Waveform
<
V1/V MAX
V2/V MAX
RF ENVELOPE OUTPUT
=
0.7
<
=
0.8
V1
V
V2
Fig. C-7
8. Check the Tape Travel after Reassembling Deck Assembly.
8-1. Checking Audio and RF Locking Time during playback and after CUE or REV (FF/REW)
Test Equipment/ Fixture
• Oscilloscope
• Alignment T apes(with 6H
3KHz Color Bar Signal)
• Stop Watch
Specification
• RF Locking Time: Less than 5
sec.
• Audio Locking Time:Less than
10sec
Test Equipment
Connection Points
Connection Points
• CH-1: PB RF Envelope
• CH-2: Audio Output
• RF Envelope Output Point
• Audio Output Jack
Test Conditions
(Mechanism Condition)
• Play an Alignment Tape
(with 6H 3kHz Color Bar
Signal)
OSCILLOSCOPE
CH1 CH2
Checking Procedure
Play an Alignment Tape then change the operating mode to
CUE or REV and confirm if the unit meets the above listed
specifications.
8-2. Checking for tape curling or jamming
Test Equipment/ Fixture
• T-160 Tape
• T-120 Tape
• Be sure there is no tape jamming or curling at
the begining, middle or end of the tape.
Specification
Checking Procedure
1) Confirm that the tape runs smoothly around the roller
guides, Drum and A/C Head Assemblies while abruptly
changing operating modes from Play to CUE or REV.
This is to be checked at the begining, middle and end
sections of the tape.
NOTES:
1) CUE is the forward search mode
2) REV is the backward search mode
3) Refer to the Play mede
Test Conditions (Mechanism Condition)
•
Run the CUE, REV, Play mode at the
VCR(VCP) State
beginning and the end of the tape.
2) Confirm that the tape passes over the A/C Head
Assembly as indicated by proper audio reproduction and
proper tape counter performance.
4-18
MAINTENANCE/INSPECTION PROCEDURE
1. Check before starting repairs
The following faults can be remedied by cleaning and oiling. Check the needed lubrication and the conditions of
cleanliness in the unit.
Check with the customer to find out how often the unit is
used, and then determine that the unit is ready for inspection and maintenance. Check the following parts.
Phenomenon Inspection
Color beats Dirt on Full-Erase Head
Poor S/N, no color Dirt on Video Head
Vertical or
Horizontal jitter
Low volume,
Sound distorted
Tape does not run.
Tape is slack
In Review and
Unloading (off mode),
the tape is rolled up
loosely.
Dirt on Video Head
Dirt on tape transport system
Dirt on Audio/Control Head
Dirt on Pinch Roller
Clutch Assembly D35
torque reduced
Cleaning Drum and
transport system
Replace-
ment
o
o
o
o
o
o
Fig. C-9-3
NOTE
If locations marked with o do not operate normally after
cleaning, check for wear and replace.
See the EXPLODED VIEWS at the end of this manual as
well as the above illustrations and see the Greasing (Page
4-21, 22) for the sections to be lubricated and greased.
F/E Head
Video Head
A/C Head
Pinch Roller
Belt Capston
Clutch
Assembly D35
Fig. C-9-1 Top View
Fig. C-9-2 Bottom View
* No. (1)~(12) Indicates the Tape Path to be traveled from Supply Reel to Take-up Reel.
(3) F/E Head
(5) Drum Assembly
(Video Head)
(4) Base
Assembly P2
(2) Tension Post
(1) Supply Reel
Fig. C-9-3 Tape Transport System
4-19
(6) Base Assembly P3
(7) A/C Head
(8) P4 Post
(10) Pinch Roller
(11) T ake-up Guide Post
(9) Capstan Shaft
(12) Take-up Reel
MAINTENANCE/INSPECTION PROCEDURE
2. Required Maintenance
The recording density of a VCR(VCP) is much higher than
that of an audio tape recorder. VCR(VCP) components must
be very precise, at tolerances of 1/1000mm, to ensure compatibility with the other VCRs. If any of these components are
worn or dirty, the symptoms will be the same as if the part is
defective. To ensure a good picture, periodic inspection and
maintenance, including replacement of worn out parts and
lubrication, is necessary.
3. Scheduled Maintenance
Schedules for maintenance and inspection are not fixed
because they vary greatly according to the way in which the
customer uses the VCR(VCP), and the environment in which
the VCR(VCP) is used.
But, in general home use, a good picture will be maintained
if inspection and maintenance is made every 1,000 hours.
The table below shows the relation between time used and
inspection period.
Table 1
When
inspection is
necessary
Average
hours used
per day
About 1
year
About 18
months
About 3
years
4. Supplies Required for Inspection and Maintence
(1) Grease : Kanto G-311G (Blue) or equivalent
(2) Isopropyl Alcohol or equivalent
(3) Cleaning Patches
(4) Grease : Kanto G-381(Yellow)
5. Maintenance Procedure
5-1) Cleaning
(1) Cleaning video head
First use a cleaning tape. If the dirt on the head is too
stubborn to remove by tape, use the cleaning patch. Coat
the cleaning patch with Isopropyl Alcohol. Touch the
cleaning patch to the head tip and gently turn the
head(rotating cylinder) right and left.
(Do not move the cleaning patch vertically. Make sure
that only the buckskin on the cleaning patch comes into
contact with the head. Otherwise, the head may be damaged.)
Thoroughly dry the head. Then run the test tape. If lsopropyl Alcohol remains on the video head, the tape may
be damaged when it comes into contact with the head
surface.
(2) Clean the tape transport system and drive system, etc, by
wiping with a cleaning patch wetted with Isopropyl
Alcohol.
One hour
Two hours
Three hours
Cleaning Patch
Coat With Isopropyl Alcohol
NOTES:
1 It is the tape transport system which comes into contact
with the running tape. The drive system consists of those
parts which moves the tape.
2 Make sure that during cleaning you do not touch the tape
transport system with excessive force that would cause
deformation or damage to the system.
Drum
(Rotating Cylinder)
Head Tip
Touch this section of cleaning
patch to the head tip and gently
turn the Drum (Rotating Cylinder)
Fig. C-9-4
4-20
MAINTENANCE/INSPECTION PROCEDURE
3
5
7
6
1
7
2
4
5
7
8
1
2
6
4
3
Slider Guide
Slider Guide
5-2) Greasing
(1) Greasing guidelines
Apply grease, with a cleaning patch. Do not use excess
grease. It may come into contact with the tape transport
or drive system. Wipe excessive grease and clean with
cleaning patch wetted in Isopropyl Alcohol.
NOTE:Greasing Points
1)Loading Path Inside & Top side
2)Base Assembly P2, P3 stopper
3) Shaft
4) L/D Motor Gear Wheel Part
5)Arm Take-up Rubbing Sections
6)Reel S,T shaft(G381:Yellow)
7)Arm Assembly F/L Rotating
Sections
(2) Periodic greasing
Grease specified locations every 5,000 hours.
1) Loading Path Inside & Top side
2) Base Assembly P2,P3 stopper
3) Shaft
4) Shaft
5) Clutch Assembly D35 Shaft
6) Plate Slider Guide Sections
7) Plate Slider Guide Sections
8) Gear Assembly P2, P2 Rubbing
Sections
Chassis (Bottom)
Gear Part
Chassis (Top)
Gear Sector
Base Loading
Guide Rail
Gear Cam
Gear Drive
Gear Rack F/L
Chassis (Left Side)
4-21
Chassis (Right Side)
Plate Slider
MAINTENANCE/INSPECTION PROCEDURE
Lever, F/R Base, Tension
Arm Tension
Guide Hole
Clutch
(G-754. Yellow)
Lever, F/R, Base, Tension GEAR AY, P2 & P3
Boss Cam
4-22
MECHANISM TROUBLESHOOTING GUIDE
1.Deck Mechanism
A.
Auto REW doesn't work.
YES
Is the output of END sensor of
supply side "H"?
“H”: more than 3.5V
“L”: less than 0.7V~1V
YES
NO
Is the voltage across IR LED
between 0.8~1.5V?
YES
Check the syscon circuit.
B.
No F/R modes.
YES
Is the present mode
F/R Mode?
NO
NO
Is the Vcc. voltage of End
sensor 5V?
YES
Replace the End sensor.
Replace the IR LED.
Is the mode SW assembled
correctly? (refer to page 4-13.)
NO
Check the syscon power.
YES
Does the Capstan Motor rotate?
YES
Do the T/Up, Supply Reel
rotate?
YES
Check the syscon circuit.
4-23
NO
Is the normal voltage supplied to
the Capstan Motor Vcc1, Vcc2?
YES
Does terminal voltage(Vctl) of
Capstan Motor supply side more
than 4V?
YES
Replace the Capstan Motor.
NO
Check the servo, power
circuits.
MECHANISM TROUBLESHOOTING GUIDE
C.
AUTO STOP.
(PLAY/CUE/REV)
Check alignment positions
(page 4-13).
In Play/Cue/Rev, Is the Pinch
Roller in contact with the
Capstan Shaft?
YES
Are there T/up and Supply Reel
pulses.
YES
Check the Syscon, µ-COM.
D.
Cassette doesn’t load.
Insert the cassette.
NO
NO
Is the output of DFG, DPG OK?
YES
Check the Servo, Syscon.
Replace the Reel Sensor.
NO
Replace the Drum Motor.
YES
Does the Lever Assembly S/W
work normally?
YES
Is there variation for CST IN S/W
Output?
(In Tape with REC Tab
“L”→“H”→“L”)
(In Tape without REC Tab
“L”→“H”→“L”→“H”)
YES
Check the Syscon Circuit.
NO
NO
NO
Check Lever Assembly S/W.
Does the CST IN S/W work
normally?
YES
Check the Syscon Circuit.
NO
Replace the CST IN S/W.
4-24
MECHANISM TROUBLESHOOTING GUIDE
E.
In PB mode Tape Presence
not sensed.
Is the Pinch Roller attached
to the Capstan Motor Shaft?
YES
Does the T/Up Reel turn?
YES
Does the Capstan Motor turn?
YES
Does the Drum Motor turn?
YES
Are there DPG, DFG pulses?
NO
NO
NO
Check Alignment positions
(page 4-13).
Is the Belt ok?
YES
Check the Clutch and Idler
Assembly.
Is the voltage supplied to the
Capstan Motor Vcc1,Vcc2 each?
YES
Is the terminal voltage(vctl) of
Capstan Motor supplied more
than 4V?
NO
Replace the Belt.
NO
Check the Servo, Power.
YES
Are the T/Up and Supply Reel
Sensors ok?
YES
Check the Servo, Syscon.
4-25
NO
YES
Replace the Capstan Motor.
Is the Vcc voltage of the Drum
Motor normal?
YES
Is the terminal voltage(vctl) of the
Drum Motor more than 4V?
YES
Replace the
Drum Motor.
NO
Check the Syscon, Circuit.
NO
Check the Syscon, Circuit.
MECHANISM TROUBLESHOOTING GUIDE
2. Front Loading Mechanism
A.
Cassette cannot be inserted.
Does the Lever Assembly
Switch work?
YES
Is the Vcc of Main P.C.Board
5V?
YES
Is the voltage between cassette
switch and GND on Main
P.C.Board 5V??
YES
Check the Mode switch location
and syscon circuit.
NO
NO
NO
Is the Lever Assembly Switch
Spring damaged or omitted?
NO
YES
Does the CST IN Switch work
normally?
NO
YES
Check the syscon circuit.
Check the power circuit.
Is there a short circuit between cassette
switch and GND on main P.C.Board?
YES
Remove the short circuit part or
Replace the main P.C.Board.
NO
Replace or add the Lever
Assembly Switch Spring.
Replace the CST IN Switch.
Replace the CST IN Switch.
B.
Cassette does not eject.
Does the L/D Motor rotate in reverse?
YES
Does the Lever Assembly Switch work?
YES
Does the Arm Assembly F/L work normally?
YES
Does the Opener Door work?
NO
Check the L/D Motor or Drive IC.
NO
Replace the Lever Assembly Switch.
NO
Replace the Arm Assembly F/L.
NO
Replace the Opener Door.
4-26
MECHANISM TROUBLESHOOTING GUIDE
C.
Cassette does not load.
Does the cassette insert?
YES
Does the Opener Lid work?
YES
Does the Gear Assembly Rack F/L
work?
NO
NO
YES
Does the Opener Door work?
YES
Does the Arm Assembly F/L work?
YES
Does the L/D Motor work?
NO
NO
Replace the Opener Lid.
Replace the Gear Rack F/L.
Check the opener Door assembled
correctly.
Replace the Arm Assembly F/L.
YES
Does the Holder Assembly Cassette
move the Arm Assembly F/L?
YES
Replace the Front Loading
Mechanism Assembly.
4-27
NO
Check the power of L/D Motor.
NO
Check the Holder Assembly Cassette
assembled correctly.
EXPLODED VIEWS
117
103
105
117
100
106
107
A21
114
113
112
110
115
A24
116
102
A23
032
A22
109
054
054A
100A
100B
1. Front Loading Mechanism Section
4-28
EXPLODED VIEWS
401
402
001
008
011
031
079
017
032
024
406
020
021
028
019
018
029
030
026
A03
A04
A01
002
002A
025
027
022
003
004
006
007
010
405
014
015
009
409
013
023
016
405
012
402
OPTIONAL PART
2. Moving Mechanism Section(1)
4-29
EXPLODED VIEWS
051
052
517
061
056
058
518
052A
055
060
410
070
069
076
032
077
068
064
066
065
067
A11
078
A12
OPTIONAL PART
3. Moving Mechanism Section(2)
4-30
MEMO
VICTOR COMPANY OF JAPAN, LIMITED
12,3-chome,Moriya-cho,Kanagawa-ku,Yokohama,Kanagawa-prefecture,221-8528,JapanAV & MULTIMEDIA COMPANY.
Printed in Japan
0305 VP
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