Page 1
SERVICE MANUAL
VIDEO CASSETTE PLAYER
HR-P55A, HR-P55A/S
HR-P56A
Regarding service information other than these sections, refer to the service manual No. 82915 (HR-J290EU).
Also, be sure to note important safety precautions provided in the service manual.
SPECIFICATIONS
GENERAL
Power : 110 V – 240 Vd, 50 Hz/60 Hz
Power consumption
Power on : Approx. 12 W
Standby mode : 3.0 W
Video Head system : Rotary two-head helical scan system
Tape format : Tape width 1/2"
Rewind time : Approx. 180 sec. with E-180 cassette
Dimensions (W x H x D) : 360 mm x 94.5 mm x 230 mm
Weight : 3.2 kg
Operating temperature : 5°C to 35°C
Operating humidity : Less than 80 %
(12.7 mm high density VHS tape)
VIDEO
Signal system : PAL/SECAM-type colour signal and
CCIR monochrome signal, 625 lines
50 fields
Recording Format : PAL/MESECAM/NTSC3.58/NTSC4.43
RF OUT : PAL/SECAM (G or K)
Input level : 1.0 Vp-p, 75Ω , unbalanced
Output level : 1.0 Vp-p, 75Ω , unbalanced
RF modulator : UHF channels 32 – 40 (Adjustable)
AUDIO
Input level : –6.0 dBm, more than 47 kΩ
Output level : –6.0 dBm, less than 1.5 kΩ
Audio track : Mono track
Audio frequency response
: 100 Hz to 10,000 Hz
(–6/+3 dBm)
ACCESSORIES
Provided accessories : RF cable,
Infrared remote control unit,
“R3” battery x 2
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without
notice.
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
HR-P55A, HR-P55A/S, HR-P56A V15P1
No.82939
August 2002
Page 2
Page 3
TABLE OF CONTENTS
SECTION 1
SUMMARY
KEY TO ABBREVIATIONS . . . . . . . . . . . . . . . . 1-1
IMPORTANT SAFETY PRECAUTIONS
RF CHANNEL ADJUSTMENT . . . . . . . . . . . . . . .1-4
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 1-5
. . . . . . . . 1-2
SECTION 2
CABINET & MAIN CHASSIS
SERVICE METHOD . . . . . . . . . . . . . . . . . . . . . 2-1
(1) Disassembly Flow . . . . . . . . . . . . . . . . . . . . . . . 2-1
(2) Re-assembly Flow for service like Fig.2-1 . . . . . 2-1
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . 2-2
1. Cabinet & Main Frame Section . . . . . . . . . . . . . 2-2
2. Packing & Accessory Section . . . . . . . . . . . . . . 2-3
BLOCK& CIRCUIT DIAGRAMS . . . . . . . . . . . .3-16
1. POWER BLOCK DIAGRAM . . . . . . . . . . . . . . .3-16
2. POWER(SMPS) CIRCUIT DIAGRAM . . . . . . . .3-18
3. MODULATOR/JACK CIRCUIT DIAGRAM . . . . .3-20
4. AUDIO BLOCK DIAGRAM
(MONO MODELONLY) . . . . . . . . . . . . . . . . . . .3-22
5. Y/C BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . .3-23
6. A/V CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . .3-24
7. SYSTEM BLOCK DIAGRAM . . . . . . . . . . . . . . .3-26
8. SYSTEM CIRCUIT DIAGRAM . . . . . . . . . . . . . .3-28
• WAVEFORM & VOLTAGE SHEET . . . . . . . . .3-30
• VOLTAGE SHEET . . . . . . . . . . . . . . . . . . . . .3-32
PRINTED CIRCUIT BOARD DIAGRAMS . . . . .3-34
1. MAIN P.C.BOARD . . . . . . . . . . . . . . . . . . . . . . .3-34
SECTION 4
MECHANISM
SECTION 3
ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS
ARRANGEMENT . . . . . . . . . . . . . . . . . . . . . . . . 3-1
ELECTRICAL ADJUSTMENT PROCEDURES . . 3-2
1. SERVO CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . 3-2
ELECTRICAL TROUBLESHOOTING GUIDE . . . 3-3
1. POWER(SMPS) CIRCUIT . . . . . . . . . . . . . . . . . 3-3
2. SERVO CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . .3-6
3. Y/C CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
4. AUDIO CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . .3-12
5. SYSTEM & KEY CIRCUIT . . . . . . . . . . . . . . . . .3-14
Refer to the service manual No.82915 (HR-J290EU).
SECTION 5
REPLACEMENT PARTS LIST
5.1 EXPLODED VIEW. . . . . . . . . . . . . . . . . . . . . . . .5-1
5.2 REPLACEMENT PARTS LIST. . . . . . . . . . . . . . .5-4
Page 4
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 Eletr ic
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
Page 5
Important Safety Precautions
cut close to connector
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).
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.1
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.
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 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.
Metal sleeve
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
Page 6
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
Page 7
RF CHANNEL ADJUSTMENT
TOP
CASE
REAR
MAINFRAM
MODULATOR
SET WITHIN
A:CH ADJ
B:SYSTEM G/K ADJ
1. RF setting initial condition for your VCP Models
RF Channel(32~40CH)
35CH for Australia
36CH for CIS
36CH for Southeast Asia
39CH for Singapor,Malaysia
G/K Switch(BG/DK)
G for Australia
K for CIS
G for Southeast Asia
G for Singapor,Malaysia
2. RF Channel adjusting method for your TV sets
1. Open the Top Case of the VCP set
2. Connect VCP “RF OUT” and TV “ANT IN” with RF Cable.
3. Select the TV Channel to the Channel you wish to adjust from VCP set.
4. Playback a recorded Video Tape and adjust the “CH ADJ” until normal
picture is displayed on the TV screen.(See Fig. Above “A”(CH ADJ)
5. Set the VCP G/K Switch to G or K according to your TV system.
(See Fig. above “B”(G/K ADJ)
1-4
Page 8
General
Video
Audio
SPECIFICATIONS
Power.................................... AC110~240V, 50/60Hz
Power consumption .............. Approx. 10 Watts
Tape format........................... Tape Width 12.7 mm (0.5 inch)
Dimensions (W x H x D)....... 360 x 94 x 230 mm
Weight ................................... Approx. 3.0 Kg.
Operating temperature .......... 5 ~ 35°C
Operating humidity ................ Less than 80%
Television system.................. CCIR standard (625 lines, 50 fields), PAL colour signal
Recording format .................. PAL/NTSC3.58/NTSC4.43
RF OUT................................. K/G
Input level.............................. 1.0Vp-p, 75 Ohm, unbalanced
Output level .......................... 1.0Vp-p, 75 Ohm, unbalanced
RF modulator........................ UHF channels 32~40 (adjustable)
Input level.............................. -6 dBm, more than 47 kOhms
Output level ........................... -6 dBm, less than 1.5 kOhms
Audio track ........................... Mono track
Audio frequency response.... 100 Hz ~ 10kHz(-6/+3 dBm)
• Design and specifications are subject to change without notice.
1-5
Page 9
SECTION2 CABINET & MAIN FRAME
SERVICE METHOD
(1) Disassembly Flow
Bottom Cover
Housing & Deck
Top Case
Front Panel
Assembly
Main C.B.A
LED C.B.A
(2)Re-assembly Flow for service like Fig. 2-1
LED C.B.A
Main C.B.A
Housing & Deck
Assembly
(3)To check and replace Electrical par ts
1 Disassemble the unit according to
No.1) Disassembly Flow.
2 Re-assemble the unit according to
No.2) 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)
Housing & Deck Assembly
Main C.B.A
Cassette Tape
(Upside Down)
Fig.2-1
2-1
Page 10
1. Cabinet and Main Frame Section
462
5
250
EXPLODED VIEWS
NOTE) Refer to “SECTION 5 REPLACEMENT
PARTS LIST” in order to look for the
part number of each part.
OPTIONAL P ARTS
300
A46
4
462
457
320
330
3
464
261
260
457
2
A00
A49
452
A42
A43
1
A
BCD
284
283
280
2-2
Page 11
2.Packing Accessory Section
810
CABLE SET ASS'Y
808
BATTERY
(Optional Parts)
803
PACKING ASS'Y
804
SHEET CUSHION
INSTRUCTION ASS'Y
801
900
REMOCON
802
BOX CARTON
2-3
Page 12
SECTION 3 ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT
: Measurement point
: Adjustment point
A/V JACK
SMPS
S
M
P
S
AVCP
DECK CNT.
A/V
SYSTEM
U-COM
3-1
Page 13
ELECTRICAL ADJUSTMENT PROCEDURES
1. Servo Adjustment
1) PG Adjustment
• Test Equipment
a) OSCILLOSCOPE
b) PALTEST TAPE (VHS SP)
• Adjustment And Specification
MODE
PLAY
MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION
V.Out
H/SW(W373, W374)
VR501 6.5 ± 0.5H
• Adjustment Procedure
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) Connect the CH1 of the oscilloscope to the H/SW(W373, W374) and CH2 to the Video Out for the VCR.
c) Trigger the mixed Video Signal of CH2 to the CH1 H/SW(W373, W374), and then check the distance
(time difference), which is from the selected A(B) Head point of the H/SW(W373, W374) signal to the
starting point of the vertical synchronized signal, to 6.5H ± 0.5H (416µs, 1H=64.0µs).
• CONNECTION
V.Out
OSCILLOSCOPE
CH1 CH2
H.SW(W373, W374)
• WAVEFORM
VR501
H/SW
Composite
VIDEO
6.5H(412us)
Fig. 3-2
3-2
H/SW
V.out
(W373,W374)
Page 14
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power Circuit(SMPS)
(1) No 5.3VA.
No 5.3VA.
YES
Is the F101 normal?
YES
Is the BD01 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 15~19V) permittable at the
IC101 Pin 3?
NO
Check or Replace the D103.
Is there DC voltage at the IC101 Pin 3?
YES
Is there about 2.5V at the IC103 Vref ?
YES
Is the D106 normal?
YES
Check the Main PCB 5.3VA/5.0V
Line short?
NO
NO
NO
Replace the IC102.
Replace the IC103.
Replace the D106.
3-3
Page 15
7. Power Circuit(SMPS)
(2) No 13VA.
No 13VA.
YES
Does 5.3VA work nor mally? Check whether 5.3VA is out of order.
Is the D108 normal?
Check 13VA/12VA Line of the
Main PCB short.
(3) No 12VA.
NO
YES
NO
Replace the D108.
YES
No 12VA.
YES
Does 13VA work nor mally? Check whether 13VA is out of order.
YES
Is the D152 normal?
YES
Check or Replace the Motor Vcc.
NO
NO
Replace the D152.
3-4
Page 16
7. Power Circuit(SMPS)
(4) No 5V .
No 5V.
YES
Is 5.3VA put into the Q155/Q157
collector?
YES
Is the Q156 Base “H”?
YES
Is about 5.5V put into the
Q155/Q157 Base?
YES
Check or Replace the Q155/Q157.
NO
Check the Power Control.
NO
Does the 13VA Line work nor mally?
NO
1 Check the 13VA Line.
2 Check the Per ipheral
3-5
Page 17
2. SERVO CIRCUIT
(1) Unstable Video in PB MODE
Unstable Video in
PB Mode.
YES
Does the Noise level of the
screen change
periodically?
YES
Do the CTL pulses appear
at the IC501 Pin 37?
YES
Does the CFG waveform
appear at the IC501
Pin 40?
YES
On tracking do the CTL
pulses move?
YES
Does the Video Envelope
waveform appear at the
IC501 Pin 12?
YES
Replace the IC501.
(2) When the Drum Motor
(2) doesn’t run.
When the Drum Motor
doesn’t run,
Does 12VA appear at the
PMC01 Pin8?
NO
NO
NO
NO
Is adjusting the height of
the CTL Head accurate?
Replace the IC501.
Refer to “When the Y signal
doesn’t appear on the
screen in PB Mode”.
Check Power.
Do the Drum PWM Pulses
appear at the IC501
Pin 26?
YES
Aren’t the foil patterns and
the Components between
IC501 Pin 26 and PMC01
Pin 12 short?
NO
NO
YES
Readjust the height of the
CTL Head.
Do the DPG/DFG Pulses
appear at the PMC01
Pin 11?
NO
Check the Drum Motor
Ass’y.
Does DPG/DFG appear at
the PMC01 Pin 11?
Check the connector and
the Drum Motor Ass’y.
NO
Do the DFG Pulses appear
at the IC501 Pin 38?
Do the Drum PWM Pulses
appear at the IC501
Pin 26?
Aren’t the connecting patterns and the Components
between IC501 Pin 26 and PMC01 Pin 12 short?
3-6
NO
NO
Aren’t the foil patterns and
the Components between
IC501 Pin 38 and PMC01
Pin 12 short?
Replace the IC501.
Page 18
2. SERVO CIRCUIT
(3) When the Capstan Motor doesn’t run,
When the Capstan Motor doesn’t run,
Does 12VA appear at the PMC01?
YES
Does 2.8V appear at the PMC01 Pin 9?
YES
Check the PMC01 and the Capstan
Motor Ass’y .
Aren’t the foil patterns and Components
between IC501 Pin 10 and PMC01
Pin 9 short?
Does the CFG signal come into the
IC501 Pin 40?
NO
NO
YES
YES
Refer to “SMPS(CAPSTAN/12Volt)
Trouble Shooting”.
Does the PWM signal appear at the
IC501 Pin 25?
NO
Does the CFG signal appear at the
PMC01 Pin 1?
NO
Check the Capstan Motor Ass’y.
YES
Does the Capstan PWM signal appear at
the IC501 Pin 25?
YES
Aren’t the foil patterns and Components
between IC501 Pin 25 and PMC01
Pin 9 short?
NO
Aren’t the foil patterns and component
between IC501 Pin 40 and PMC01 Pin 1
short?
NO
Replace the IC501.
3-7
Page 19
3. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal
appear at the IC301 Pin 30?
YES
Is 5V applied to the IC301
Pins 12, 36, 61, 67, 90, 96?
YES
Does the Video signal
appear at the IC301 Pin 52?
YES
Does the Video signal
appear at the Emitter
terminal of the Q309?
NO
NO
NO
Check the Video Input
Jack.
(Line In Jack)
Check the 5V Line.
(Power Circuit)
Is I2C BUS signal applied to
the IC301 Pins 62, 63?
YES
Is there 5V on the Emitter
of Q309?
NO
NONO
Check the System Circuit.
(Refer to ‘SYSTEM I2C BUS
CHECK Trouble Shooting’)
Check C330. (AGC)
YES
Replace the IC301.
Replace the Q309.
3-8
Check the 5V Line.
(Power Circuit)
Page 20
3. Y/C CIRCUIT
(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,
Is 5V applied to the IC301
Pins 12, 36, 61, 67, 90, 96?
YES
Is the I2C Bus siganl applied
to the IC301 Pins 62, 63?
YES
Does the normal RF signal
appear at the IC301 Pin79?
YES
NO
NO
NO
Check the line of the 5.3V
Line. (Power Circuit)
Refer to ‘SYSTEM I2C BUS
CHECK Trouble Shooting’.
Is the V.H.S/W signal
applied to the IC301 Pin81?
YES
Is V.H.S/W “H” about 4.5V
at the IC301 Pin 81?
YES
Clean the Drum.
NO
NO
NO
Check the System Circuit.
(IC501 Pin 24)
Check the V.H.S/W level.
Replace the IC301.
Does the Y(Luminance) RF
signal appear at the IC301
Pin 18?
YES
Is the Y(Luminance) Video
waveform showed up at the
IC301 Pin 39?
YES
Replace the IC301.
NO
NO
Check the path of the
Y(Luminance) RF signal.
Check the path of the
Y(Luminance) RF signal.
YES
YES
3-9
Page 21
3. Y/C CIRCUIT
(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,
Is 5V applied to the IC301
Pins 12, 36, 61, 67, 90, 96?
YES
Does the Color signal
appear at the IC301
Pin 71, 75 ?
YES
Replace the IC301.
NO
NO
Check the line of the 5.3V
Line. (Power Circuit)
Does the X301(4.43MHZ)
or X302(3.58MHZ) oscillate?
Does the Color signal
appear at the IC301 Pin55?
Check the circuit of the
IC301 Pins 60, 58, 35.
NO
NO
YES
Replace the X301 or
the X302.
Check the Color Pass.
(Check the C341)
Replace the IC301.
3-10
Page 22
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 5V applied to the IC301
Pins 12, 36, 61, 67, 90, 96?
YES
Does PB Mdoe operate
normally?
YES
Does the RF signal appear
at the IC301 Pin 87?
YES
NO
NO
NO
NO
Check EE Mode.
Check the line of the 5.3V
Line.(Power Circuit)
Check PB Mode.
Is the REC ‘H’ signal
(about 4V) applied to the
Q303 Base?
YES
Check REC Luminance
Pass & Color Pass.
NO
YES
Check the System of REC
‘H’. (Q303 Base/IC501
Pin 55)
Replace the IC301.
Does the REC RF signal
appear at the IC301
Pins 87, 88 ?
YES
Check the Drum &
Drum Connector
NO
Check the circuit of the
IC301 Pins 86, 87, 88, 89.
YES
3-11
Page 23
4. AUDIO CIRCUIT
(1) No sound in EE Mode
No sound in EE Mode.
YES
No sound.
YES
Is 5V applied to the IC301 Pin 96?
YES
Is the Audio signal applied to the
IC301 Pin 8?
YES
Does the Audio signal appear at the
IC301 Pin 11?
YES YES
Check the connection of the Audio
out Jack.
NO
NO
NO
NO
Check the line of the 5V Line.
(Power Circuit)
Check the path of LINE/AUDIO.
Is the Audio Mute “High” signal applied
to the IC301 Pin 99?
Check the IC501 Pin 62.
(Audio Mute “H”.)
Does the CLK/Data signal(I2C)
appear at the IC301 Pins 62, 63 ?
YES
Replace the IC301.
(2) No sound in PB MODE
No sound in PB Mode.
No sound.
YES
Is 5V applied to the IC301 Pin 96?
YES
Does the CLK/Data signal(I2C) appear at
the IC301 Pins 62, 63?
YES
Does the Audio signal appear at the
IC301 Pin 1?
YES
Does the Audio signal appear at the
IC301 Pin 11?
NO
NO
NO
NO
NO
NO
Check the IC501 Pin 90(CLK),
91(Data) Line.
Check the circuit line of the 5V Line.
(Power Circuit)
Check the IC501 Pin 90 (CLK),
91 (Data) Line.
Check the connecting state between the
P3D02 Pin 6 and A/C Head.
YES
Is the Audio Mute “H” applied to the
IC301 Pin 99?
YES
Replace the IC301.
Check the IC501 Pin 62.
3-12
Page 24
3. Y/C CIRCUIT
(3) No sound in REC Mode,
No sound in REC Mode,
YES
Sound is not recorded.
YES
Is Playback O.K.?
YES
Is the Audio signal applied
to the IC301 Pin 8?
YES
Does the Audio waveform
appear at the IC301 Pin 4 ?
YES
Is 5V applied to the FL301
Pin 2 ?
YES
Is 3.0~4.5V applied to the
Collector of the Q301 ?
NO
NO
NO
NO
Refer to “No sound in PB
Mode,”.
Check the path of Line
Audio.
Is the “High” signal applied
to the IC301 Pin 99?
YES
Check the IC501 Pin 62
(Audio Mute “H”).
Check the line of the 5V
Power Circuit.
NO
Check the CLK/Date line
and replace the IC301
YES
Does the Erase signal
appear at the FL301 Pin 5?
NO
NO
Check the Audio R/P/E
connector and Head.
Replace the FL301 or the
Q301.
3-13
Page 25
5. SYSTEM/KEY CIRCUIT
(1) AUTO STOP
Auto Stop
YES
Does the SW30 waveform
appear at the IC501
Pin 24?
YES
Do the T-UP Reel Pulses
appear at the IC501 Pin 4?
YES
Replace the IC501.
NO
NO NO
Check the Drum Motor
signal.
Do T/UP Reel Pulses
appear at the Q514
Base terminal ?
YES
Replace the T/UP Reel
Sensor (RS501).
(2) The unstable loading of a Cassette tape
The unstable loading of a
Cassette tape
YES
Is 12V applied to the
PMC01 Pin 8?
NO
Does 5.0V appear at the
RS501?
YES
Check the Q157 Power
Circuit.
Refer to “SMPS CAPSTAN
12 Volt Trouble Shooting”.
NO
YES
Does the “H” signal appear
at the IC501 Pin 57 during
inserting the CST ?
YES
Does the “L” signal appear
at the IC501 Pin 19 during
inserting the CST?
YES
Check the Deck
Mechanism.
Caution :
Auto stop can occur because Grease or Oil is dried up
NO
NO
Check the CST SW and
the peripheral circuitry.
3-14
Is 5.3V applied to the
R544 ?
YES
Refer to SMPS 5.3VA
troubleshooting.
Check the IC501
Pins 74, 75, 76, 77.
NO
Page 26
(3) KEY doesn’t working
KEY doesn’t working.
Is 5VA applied to the IC501
Pin 22?
YES
Does LED display change
when a function button is
pressed?
NO
NO
Refer to “SMPS 5.3VA
Trouble Shooting”.
Replace the defective
switches.
3-15
Page 27
Page 28
VICTOR COMPANY OF JAPAN, LIMITED
12,3-chome,Moriya-cho,Kanagawa-ku,Yokohama,Kanagawa-prefecture,221-8528,JapanHOME AV NETWORK BUSINESS UNIT.
Printed in Japan
0208 VP
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