Roadstar vdr-6205k Service Manual

Service Manual - VDR-6205K

Service Manual - VDR-6205K

VDR-6205K

R

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

SECTION1 SUMMARY

KEY TO ABBREVIATIONS

1-2

Prior to shipment from the factory, the products are strictly inspected to confrom with the recognized product
safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such com ­pliance, it is equally important to implement the following precautions when a set is being serviced.

• 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 (

Y

) parts are critical for safety.
Replace only with specified part numbers.
Note : Parts in this category also include those specified to comply with X-ray emission standards for

products using cathode ray tubes and those specified for compliance with various regulations
regarding spurious radiation emission.

3. Use Specified internal wiring. Note especially:

1) Double insulated wires

2) High voltage leads

4. Use specified insulating materials for hazardous live parts. Note especially:

1) Insulation Tape

2) PVC tubing

3) Spacers

4) Insulation sheets for transistor

5. Observe that wires do not contact heat producing
parts (heatsinks, oxide metal film resistors, fusible
resistors, etc.)

6. Check that replaced wires do not contact sharp edged
or pointed parts.

7. 1) When a power cord has been replaced, check

that A mark is made on the cord, under strain,
near the aperture, and the flexible cord is
subjected 100 times to a pull of 40N for a duration
of 1 second each.

2) During the test, the cord shall not be displaced by

more than 2mm

8. Also check areas surrounding repaired locations.

IMPORTANT SAFETY PRECAUTIONS

Fig. 1

Power code

1-3

Fig. 3

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.

• 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, incrophone jacks,
earphone jacks, etc.) See table below.

• Dielectric strength test

Confirm specified dielectric strength or greater between power cord prongs and exposed accessible parts of
the set (RF terminals, antenna terminals, video and
audio input and output terminals, incrophone jacks,
earphone jacks, etc.) See table below.

• 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 below.

Table 1 : Ratings for selected areas

* Class II model only.

Note. This table is unofficial and for reference only. Be sure to confirm the precise values for your particular

country and locality.

• Leakage Current test

Confirm specified or lower leakage current between B(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 B(earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure across both terminals of
load Z. See figure and following table.

Table 2:Leakage current ratings for selected areas.

Note. This table is for IEC member only. Be sure to confirm the precise values for your particular country and

Note. locality.

Chassis

d

a

Primary circuit terminals

Exposde
accessible
part

Z

Load

AC Voltmeter

Earth Ground,
Power cord plug prongs

B

Fig. 2

AC Line Voltage

AC Line Voltage

100 to 130 V
200 to 240 V

*100 to 130 V

*200 to 240 V

Europe

Australia

Europe

Australia

Other terminals

Antenna earth

terminals

i E 0.7m Apeak
i E 2m ADC

i E 0.7m Apeak
i E 2m ADC

F 10 MΩ/500 V DC

4kV 1 minute

F 6mm(d)
F 8mm(d)

(a Power cord)

Region

Load Z Leakage Current(i)

Earth Ground

(B) to :

Region

Insulation

Resistance

Dielectric

Strength

Clearance

Distance(d),(d)

2k

Ω

50k

Ω

1-4

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 PAL VCR 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.

SERVICE NOTICE ON REPLACING EEPROM

TIMER

AM

REC
VCR

OK

• 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