Printed in Japan
S40894
VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION
VIDEO CASSETTE PLAYER
HR-P93K
This service manual is printed on 100% recycled paper.
COPYRIGHT
© 2000 VICTOR COMPANY OF JAPAN, LTD.
No. 82767
July 2000
Audio dynamic range
................Hi-Fi audio: More than 80 dB (JIS filter)
SPECIFICATIONS
General
Power
.....................................AC 110V-240V, 50/60Hz
Power consumption
.................Approx. 15 Watts
Tape format
.............................Tape Width 12.7 mm (0.5 inch)
Dimensions (W x H x D)
............360 mm x 94 mm x 270 mm
Weight
.....................................Approx. 3.8 Kg.
Operating temperature
..............5
°C~40 °C
Operating humidity
...................Less than 80%.
Video
Television system
....................CCIR standard (625 lines, 50 fields), PAL/SECAM colour signal
Audio frequency response
........Normal: 100 Hz-10 kHz (-6/+3 dBm)
Hi-Fi: 20Hz-10 kHz (-6/+3 dBm)
Recording format..
...................PAL/MESECAM/NTSC3.58/NTSC4.43
RF OUT
....................................PAL/SECAM (G or K)
Input level
................................1.0 Vp-p, 75 Ohm, unbalanced
Output level
.............................1.0 Vp-p, 75 Ohm, unbalanced
RF modulator
............................UHF channels 32-40 (adjustable)
Audio
Input level
...............................-6 dBm, more than 47 kOhms
Output level
............................-6 dBm, less than 1.5 kOhms
Audio track
.............................Mono track
Audio signal to noise ratio
........Hi-Fi audio: More than 66 dB (JIS filter)
· Design and specifications are subject to change without notice.
PAL NTSC
REC
POWER - ON
CST.IN
STANDBY
LP / EP
/ I
STANDBY / ON
INTELLIGENT
PICTURE
COLOUR
SYSTEM
- ECHO +
1
MIC
2
- MIC +
PAUSE
REC
PLAY
DISPLAY
DISPLAY
DISPLAY
OK
EJECT
TRK
P/STILL
DISPLAY
RE C
MENU
PLAY
FF
REW
STOP
I.P.
SPEED
KARAOKE
SEARCH
ECHO
MIC
TABLE OF CONTENTS
Section
Title
Page
Important Safety Precautions
INSTRUCTIONS
1. SUMMARY
1.1 KEY TO ABBREVIATIONS . . . . . . . . . . . . . 1-1
1.2 SERVICE NOTICE ON REPLACING EEPROM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.3 CABINET & MAIN FRAME SERVICE METHOD . . 1-3
2. ELECTRICAL ADJUSTMENT
PROCEDURES
2.1 SERVO CIRCUIT . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 ELECTRICAL TROUBLESHOOTING GUIDE . . 2-2
2.2.1. Power Circuit(SMPS) . . . . . . . . . . . . . . . 2-2
2.2.2. Servo Circuit . . . . . . . . . . . . . . . . . . . . . 2-5
2.2.3. Y/C Circuit . . . . . . . . . . . . . . . . . . . . . . . 2-7
2.2.4. Audio Circuit . . . . . . . . . . . . . . . . . . . . 2-11
2.2.5. System/Key Circuit . . . . . . . . . . . . . . . 2-13
2.2.6. OSD Circuit . . . . . . . . . . . . . . . . . . . . . 2-14
2.2.7. Hi-Fi Circuit . . . . . . . . . . . . . . . . . . . . . 2-15
2.2.8. KARAOKE Circuit . . . . . . . . . . . . . . . . . 2-17
3. CHARTS AND DIAGRAMS
3.1 POWER(SMPS) BLOCK DIAGRAM . . . . . . . 3-1
3.2 AUDIO BLOCK DIAGRAM . . . . . . . . . . . . . . 3-3
3.3 Y/C BLOCK DIAGRAM . . . . . . . . . . . . . . . . . 3-4
3.4 SYSTEM BLOCK DIAGRAM . . . . . . . . . . . . 3-5
3.5 POWER(SMPS) CIRCUIT DIAGRAM . . . . . . 3-7
3.6 A/V CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . 3-9
3.7 SYSTEM CIRCUIT DIAGRAM . . . . . . . . . . 3-11
3.8 WAVEFORM & VOLTAGE SHEET . . . . . . . 3-13
3.9 MAIN AND KEY P.C. BOARDS . . . . . . . . . . 3-15
3.10 Hi-Fi BLOCK DIAGRAMS . . . . . . . . . . . . . 3-17
3.11 KARAOKE BLOCK DIAGRAM . . . . . . . . . 3-19
3.12 Hi-Fi CIRCUIT DIAGRAM . . . . . . . . . . . . . 3-21
4. MECHANISM
4.1 DECK MECHANISM PARTS LOCATIONS . . 4-1
Section
Title
Page
4.2 DECK MECHANISM DISASSEMBLY . . . . . . 4-2
4.3 TOOLS AND FIXTURES FOR SERVICE . . . 4-13
4.4 DECK MECHANISM ADJUSTMENT . . . . . 4-14
4.4.1. Mechanism Alignment Position Check . . 4-14
4.4.2. Preparation for Adjustment (To set the Deck
Mechanism to the Loading state
without inserting a Cassette Tape).
. . 4-15
4.4.3. Checking Torque . . . . . . . . . . . . . . . . . 4-15
4.4.4. Guide Roller Height Adjustment . . . . . 4-16
4.4.5. Audio/Control (A/C) Head Adjustment . . . 4-17
4.4.6. X-Value Adjustment . . . . . . . . . . . . . . . 4-18
4.4.7. Adjustment after Replacing Drum
Assembly (Video Heads) . . . . . . . . . . . 4-19
4.4.8. Check the Tape Travel after Reassembling
Deck Assembly . . . . . . . . . . . . . . . . . . . 4-19
4.5 MAINTENANCE/INSPECTION PROCEDURE
4.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
4.6 MECHANISM TROUBLESHOOTING GUIDE
4.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY
M1
5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 CABINET AND MAIN FRAME ASSEMBLY M2
5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.3 FRONT LOADING MECHANISM ASSEMBLY M3
5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.4 MOVING MECHANISM-1
M3 . . . . . . . . . . 5-4
5.5 MOVING MECHANISM-2 M3 . . . . . . . . . . 5-5
5.6 MECHANISM ASSEMBLY PARTS LIST M3
5.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.7 CABINET AND MAIN FRAME ASSEMBLY
PARTS LIST M2 . . . . . . . . . . . . . . . . . . . . 5-7
5.8 PACKING AND ACCESSORY ASSEMBLY
PARTS LIST M1 . . . . . . . . . . . . . . . . . . . . . 5-7
5.9 ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . 5-8
Important Safety Precautions
Fig.1
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 com-
ply 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.
Power cord
Fig.2
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
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 cath-
ode 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.
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 or-
der 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).
Fig.7
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
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Connector
Metal sleeve
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
Precautions during Servicing
7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or
pointed parts.
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
1.25
2.0
5.5
Crimping tool
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Crimped at approx. center
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm
S40888-01
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.
Cover 2
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 compli-
ance 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') be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
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 accessi-
ble 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
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.
d'
d
Chassis
Power cord,
primary wire
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z
0.1 ohm
Z
0.5 ohm
AC inlet
Earth pin
Exposed accessible part
Milli ohm meter
Grounding Specifications
Fig. 10
ab
c
V
Externally
exposed
accessible part
Z
Fig. 9
Fig. 8
Clearance Distance (d), (d')
d, d'
3 mm
d, d'
4 mm
d, d'
3.2 mm
1 M
R 12 M/500 V DC
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Japan
USA & Canada
Europe & Australia
R
10 M
/500 V DC
Region
Insulation Resistance (R)
R
1 M
/500 V DC
AC 3 kV 1 minute
(Class
2)
AC 1.5 kV 1 minute
(Class
1)
d
4 mm
d'
8 mm (Power cord)
d'
6 mm (Primary wire)
Table 1 Specifications for each region
a, b, c
Leakage Current (i)
AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Japan
USA & Canada
i
1 mA rms
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
i
0.5 mA rms
i
0.7 mA peak
i
2 mA dc
i
0.7 mA peak
i
2 mA dc
Europe & Australia
Region
Load Z
1 k
2 k
1.5 k
0.15
µF
50 k
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality
2
S40888-01
Safety Check after Servicing
Cover 3
1-1
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
SECTION 1
SUMMARY
1.1 KEY TO ABBREVIATIONS