Symphonic SC309D, 6309CD Schematic
SERVICE MANUAL
Sec. 1: Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA’s
9" COLOR TV/VCR COMBINATION
Sec. 2: Deck Mechanism Section
I Standard Maintenance
I Alignment for Mechanism
I Disassembly/Assembly of Mechanism
SC309D/6309CD
Sec. 3: Exploded views
and Parts List Section
I Exploded views
I Parts List
IMPORTANT SAFETY NOTICE
Proper service and repair is important to the safe, reliable operation of all
Funai Equipment. The service procedures recommended by Funai and
described in this service manual ar e effective methods of perf orming service
operations. Some of these service special tools should be used when and as
recommended.
It is important to note that this service manual contains various CAUTIONS
and NOTICES which should be carefully read in order to minimize the risk of
personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It also is important to understand
that these CA UTIONS and NO TICES ARE NO T EXHAUSTIVE. Funai could not
possibly kno w , ev aluate and advice the service trade of all conceiv ab le wa ys
in which service might be done or of the possible hazardous consequences of
each way. Consequently, Funai has not undertaken any such broad evaluation. Accordingly , a servicer who uses a service pr ocedure or tool which is not
recommended by Funai must first use all precautions thor oughly so that neither his safety nor the safe operation of the equipment will be jeopar dized by
the service method selected.
MAIN SECTION
9" COLOR TV/VCR COMBINATION
SC309D/6309CD
Sec. 1: Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA’s
TABLE OF CONTENTS
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1
Important Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2-1
Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1
Preparation for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1
Operating Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-1
Mechanical Trouble Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-15
Power Supply Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-17
Schematic Diagrams / CBA’s and T est Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1
System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12-1
IC Pin Function Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13-1
Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14-1
SPECIFICATIONS
*ˆMode---------SP mode unle ss otherwise specified
*Test input terminal
<Except Tuner>-------------Video input (1Vp-p)
Audio input (-10dB)
<Tuner>-----------------------Ant. input (80dBµV) Video: 87.5%
Audio: 25kHz dev (1kHz Sin)
<DEFLECTION>
Description Condition Unit Nominal Limit
1. Over Scan — % 90 ±5
2. Linearity Horizontal % — 12
Vertical % — 10
3. High Voltage — kV 18 —
<VIDEO & CHROMA>
Description Condition Unit Nominal Limit
1. Misconvergence Center m/m — 0.3
Corner m/m — 1.5
Side m/m — 1.2
2. Tint Control Range — deg ±30 —
3. Contrast Control Range — dB 6 —
4. Brightness APL 100% ft-L 30 —
5. Color Temperature — K 9200 —
<VCR>
Description Condition Unit Nominal Limit
1. Horizontal Resolution (R/P) Line 230 200
2. Jitter (Low) (R/P) µS 0.05 0.2
3. S/N Chroma AM(SP) (R/P) dB 38 33
PM(SP) (R/P) dB 36 33
4. Wow & Flutter (RMS) (R/P) % 0.25 0.5
<TUNER>
Description Condition Unit Nominal Limit
1. Video S/N — dB 45 40
2. Audio S/N (W/LPF) — dB 43 40
1-1-1 T4403SP
<AUDIO>
All items are measured across 8Ω resistor at speaker output terminal.
Description Condition Unit Nominal Limit
1. Audio Output Power (Max.) (R/P) W 0.8 0.6
2. Audio S/N (W/LPF) (R/P) dB 40 36
3. Audio Distortion (W/LPF) (R/P) % 3.0 5.0
4. Audio Freq. Response
(-10dB Ref. 1KHz)
Note: Nominal specificati ons represent the design specific ations. All units should be able to approximate thes e.
Some will exceed and some may drop slightly below these specifications. Limit specifications represent the absolute worst condit ion that s till might be considered acceptable. In no case shoul d a unit fail to meet limit specifications.
200Hz (R/P)
8kHz (R/P)
dB
dB
-2.0
0
-2.0±5.0
0±6.0
1-1-2 T4403SP
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the factory , our pro ducts are strictl y insp ected for re cogni zed product safety and el ectric al
codes of the countries in which they are to be sold. Howev er, in order to ma intain such c ompliance, it is equally
important to implement the following precautions when a set is being serviced.
Safety Precautions for TV Circuit
1. Before returning an instrument to the custom-
er, alwa ys make a safety check of the entire instru-
ment, including, but not limited to, the following
items:
a. Be sure that no built-in protective devices are de-
fective and have been defeated during servicing.
(1) Protective shields ar e p rovid ed o n thi s ch ass i s
to protect both the technician and the customer.
Correctly replace all missing protective shields, including any removed for servicing convenience. (2)
When reinstalling the chassis and/or other assembly in the cabinet, be sure to pu t back in place all
protective devices, including but not limited to,
nonmetallic control knobs, insulating fishpapers,
adjustment and com part ment covers/shields, and
isolation resistor/capacitor networks. Do not oper-
ate this instrument or permit it to be operated
without all protective devices correctly installed and functioning. Servicers who defeat
safety features or fail to perform safety checks
may be liable for any resulting damage.
b. Be sure that there are no cabinet openings through
which an adult or child might be able to insert their
fingers and contact a hazardous voltage. Such
openings include, but are not limited to, (1) spacing
between the picture tube and the cabinet mask, (2)
excessively wide cabinet ventilation slots, and (3)
an improperly fitted and/or incorrectly secured
cabinet back cover.
c. Antenna Cold Check - With the instrument AC
plug removed from any AC source, connect an
electrical jumper acr oss the two AC plug prongs.
Place the instrumen t AC switch in the on position.
Connect one lead of an ohmmeter to the AC plug
prongs tied together and to uch the other ohmme ter lead in turn to each tuner antenna input exposed terminal screw and, if applicable, to the
coaxial connector. If the measured resistance is
less than 1.0 meg ohm or greater than 5. 2 megohm, an abnorm ality exists that must be correct ed
before the instrument is re tur ned to the cust omer.
Repeat this test with t he instrument AC switch in
the off position.
d. Leakage Current Hot Check - With the instru-
ment completely reassembled, plug the AC line
cord directly into a 120V AC outlet. (Do not use an
isolation transformer dur ing thi s test.) Use a leak-
age current teste r or a me tering system tha t c om plies with American National Standards Institute
(ANSI) C101.1 Leakage Current for Appliances
and Underwriters Lab oratories (UL) 1410, (50.7).
With the instrument AC switch first in the on po sition and then in the o ff position, measure from a
known earth ground (metal water pipe, conduit,
etc.) to all exposed metal par ts of the instr ument
(antennas, handle brackets, metal cabinet, scr ew
heads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current
measured must not exceed 0.5 milli-ampere. Reverse the instrument power cord plug i n the out let
and repeat the test.
READING SHOULD
NOT BE ABOVE 0.5 mA
LEAKAGE
DEVICE
BEING
TESTED
TEST ALL EXPOSED
METAL SURFACES
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED
CURRENT
TESTER
EARTH
GROUND
ANY MEASUREMENTS NO T WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED
BEFORE RETURNING THE INSTRUMENT TO
THE CUSTOMER OR BEFORE CONNECTING
THE ANTENNA OR ACCESSORIES.
e. X-Radiation and High Voltage Limits - Because
the picture tube i s the prim ary potentia l source of
X-radiatio n in solid- state TV receiver s, it is s pecially constructed to prohibit X-radiation emissions.
For continued X-radiation pr otection, the replacement picture tube must be the same type as the
original. Also, because the picture tube shields
and mounting hardware perform an X-radiation
protection function, they must be correctly in place.
High voltage must be mea su re d ea ch tim e s er vic -
1-2-1 SFTY_2
ing is performed that inv olves B+, horizontal deflection or high voltage. Correct operation of t he
X-radiation protection c ircu its a ls o m ust b e r ec on firmed each time they are serviced. (X-radiation
protection circuits also may be called "horiz ontal
disable" or "hold do wn.") R ead a nd a ppl y th e hi gh
voltage limits a nd, if the chassis is so e quipped,
the X-radiation protection circuit specifications given on instrument labe ls and i n the P roduct S afety
& X-Radiation Warning note on the service data
chassis schematic. High voltage is maintained
within specified limits by close tolerance safety-related components/adjus tme nts in th e hig h-vo lta ge
circuit. If high voltage exceeds specified limits,
check each component specified on the chassis
schematic and take corrective action.
2. Read and comply with all caution and safety-related notes on or inside th e receiver cabi net, on the
receiver chassis, or on the picture tube.
3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this TV receiver. Design alterations and additions, including,
but not limited to circuit modificatio ns and the addition of items such as auxiliary audio and/or video
output connections, mig ht alter the safety ch aracteristics of this receiver and create a hazard to the
user. Any design alter ations or addition s will void
the manufacturer's warr anty and may make you,
the servicer, responsible for personal injury or
property damage resulting therefrom.
4. Picture Tube Implosion Protection Warning -
The picture tube in this receiver employs integral
implosion protection. For continued implosion protection, replace the pic ture tube only with one of
the same type numbe r. Do not rem ove, install , or
otherwise handle the picture tube in any ma nner
without first putting on shatterproof goggles
equipped with side shields. People not so
equipped must be ke pt safely away while p icture
tubes are handled. Keep the picture tube away
from your body. Do not handl e the pictur e tu be b y
its neck. Some "in-line" picture tubes are equipped
with a permanently at tached deflection yoke ; because of potential hazard, do not try to remove
such "permanently attached" yokes from the picture tube.
5. Hot Chassis Warning -
a. Some TV receiver chassis are electrically connect-
ed directly to one conduc tor of th e AC powe r cor d
and maybe safety-serviced without an isolation
transformer only i f the AC power plug i s inserted
so that the chassis is connected to the ground side
of the AC power source. To confi rm that the AC
power plug is ins erted correctly, with an AC voltmeter, measure between the chassis and a known
earth ground. If a voltage reading in excess of 1.0V
is obtained, remove and reinsert the AC power
plug in the opposite polarity and again measure
the voltage potential between the chassis and a
known earth ground.
b. Some TV receiver chassis normally have 85V
AC(RMS) between ch assis and earth ground regardless of the AC plug polarity. This chassis can
be safety-serviced only with an isolation transformer inserted in the power line between the receiver
and the AC power so urce , for both pers onnel and
test equipment protection.
c. Some TV receiver chassis have a secondary
ground system in addition to the main chassis
ground. This se conda ry gro und s ystem is no t iso lated from the AC power line. The two ground systems are electrically separated by insulation
material that must not be defeated or altered.
6. Observe original lead dress. Take extra care to assure correct lead dres s in the following areas: a.
near sharp edge s, b. near thermal ly hot parts-be
sure that leads and components do not touch thermally hot parts, c. the AC su pply, d. high volta ge,
and e. antenna wiring. Alway s inspe ct in all ar eas
for pinched, out of plac e, or frayed wiring. C heck
AC power cord for damage.
7. Components, parts, and/or wiring that appear to
have overheated or are otherwise damaged
should be replaced with components, parts, or wiring that meet origin al specifications. Additiona lly,
determine the cause of ov erheating and/or damage and, if nece ss ar y, ta ke corre ct i ve ac ti o n to remove any potential safety hazard.
8. Product Safety Notice - Some electrical and mechanical parts have s pecia l safety- relat ed char acteristics which are often not evident from visual
inspection, nor can the protection they give necessarily be obtained by replaci ng them with components rated for higher voltage, wattage, etc.. Parts
that have special safety characteristics are identified by a ( # ) on schematics and in parts lists. Use
of a substitute replacement that does not have the
same safety characteristics as the recommended
replacement part might create sh ock, fire, and/or
other hazards. The Product's Safety is under review continuously and new instructions are issued
whenever appropriate . Prior to shi pment from the
factory, our products are strictly inspected to confirm with the recognized product safety and electrical codes of the countrie s in which they ar e to be
sold. However, in order to maintain such compliance, it is equal ly important to imp lement the following precautions when a set is being serviced.
1-2-2 SFTY_2
Precautions during Servicing
A. Parts identified b y the ( # ) symbo l are c ritica l for
safety.
Replace only with part number specified.
B. In addition to safety, othe r parts and assemblies
are specified for conformance with regulations applying to spurious radiati on. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
D. Use specified insulating materials for hazardous
live parts. Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers
4) Insulators for transistors.
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of
wires securely abo ut the terminals before so ldering.
F. Observe that the wires do not contact heat produc-
ing parts (heatsinks, oxide metal film resistors, fusible resistor s, etc.)
G. Check that replaced wires do not contact sharp
edged or pointed parts.
H. When a power cord has been replaced, check that
5~6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Use care that foreign objects (screws, solder drop-
lets, etc.) do not remain inside the set.
K. Crimp type wire connector
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, in order to
prevent shock hazards, perform carefully and precisely the following steps.
Replacement procedure
1) Remove the old con nector by cutti ng the wires at
a point close to the connector.
Important: Do not re-use a connector (discard it).
2) Strip about 15 mm of the in su lation from the en ds
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
3) Align the lengths of the wires to be connected . Insert the wires fully into the connector.
4) Use the crimping too l to crimp the met al slee ve at
the center position . Be sure to crimp fully to the
complete closure of the tool.
L. When connecting or disconnecting the VCR con-
nectors, f irst, di sconnec t the AC plug fr om AC supply socket.
1-2-3 SFTY_2
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 spec ified values in or der to verify comp liance
with safety standards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and ( d') between sol dered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
Chassis or Secondary Conductor
Primary Circuit Terminals
dd'
AC Line Voltage Region
110 to 130 V
Note: This table is unofficial and for reference only.
Be sure to con firm the precise v alues.
USA or
CANADA
Clearance
Distance (d) (d')
≥ 3.2 mm
(0.126 inches)
2. Leakage Current Test
Confirm the specified (or lower) leakage current between B (earth ground, power cord plu g prongs) and
externally exposed accessible parts (RF terminals,
antenna terminal s, video and audio inp ut 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 Fig. 2 and following table.
Table 2 : Leakage current ratings for selected areas
Exposed Accessible Part
Z
One side of
B
Power Cord Plug Prongs
Fig. 1
AC Voltmeter
(High Impedance)
Fig. 2
AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:
110 to 130 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
USA or
CANADA
0.15µF CAP. & 1.5kΩ
RES. connected in
parallel
1-2-4 SFTY_2
i≤0.5mA rms
Exposed accessible
parts
STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is indicated as shown:
Top View
Out
2. For other ICs, pin 1 and every 5th pin is indica ted
as shown:
Pin 1
3. The 1st pi n of every pin conn ector are indi cated as
shown:
Pin 1
Input
In
Bottom View
5
10
How to Read the Values of the Rectangular Type Chip Components
Example:
(a) Resistor
473
= 473 = 47 [kΩ]
(b) Capacitor
= Not Shown
Caution:
Once chip parts (Resistors, Capacitors, Transistors,
etc.) are removed, they must not be reused. Always
use a new part.
Replacement Procedures for
(Top View)
(Top View)
Instructions for Connectors
1. When you connec t or disconnect FFC cable (connector), be sure to disconnect the AC cord.
2. FFC cable (connec tor) should be inserted parallel
into the connector, not at an angle.
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
[ CBA= Circuit Board Assembly ]
Leadless (Chip) Components
The Following Procedures are Recommended for the Replacement of the Leadless Components Used in this Unit.
1. Preparation for replacement
a. Sol der i ng Iron
Use a pencil-type soldering iron (less than 30
watts).
b. Solder
Eutectic solder (Tin 63%, Lead 37%) is recommended.
c. Solderi ng tim e
Do not apply heat for more than 4 seconds.
d. Preheating
Leadless capacitor must be preheated before
installation. (130°C~150°C, for about two minutes.)
Notes:
a. Leadless components must not be reused after
removal.
b. Excessive mechanical stress and rubbing for the
component electrode must be avoided.
2. Removing the leadless component
Grasp the leadless component body with tweezers
and alternately apply heat to both electrodes. When
the solder on both electrodes has melted, remove
leadless component with a twisting motion.
1-3-1 SFTY_5
Notes:
a. Do not attemp t to lift the component off the board
until the component is completely disconnected
from the board by the twisting action.
b. Take care not to break the copper foil on the
printed board
3. Installing the leadless component
a. Presolder the contact points of the circuit board.
b. Press th e par t downward with tweezer s and so lder
both electrodes as shown below.
Note:
Do not glue the replacement leadless component to
the circuit board.
Tweezers
Chip
Soldering Iron
Soldering Iron
Tweezers
Solder
Soldering Iron
2. The F lat Pack-IC on the CBA is affixed with glu e,
so be careful not to break or damage the foil of
each pin or solder lan ds un der t he IC when removing it.
1. Removal
With Hot - Air Flat Pack - IC Desoldering Machine:
a. Prepare the Hot - Air Flat Pack - IC Desoldering
Machine, then apply hot air to Fl at Pack - IC (about
5~6 seconds). (Fig. S-1-1)
b. Remove the Flat Pack- IC with tweezers while
applying the hot air.
With Soldering Iron:
a. Using desoldering braid, remove the solder from all
pins of the Flat Pack - IC. When you use solder flux
which is applied to all pins of the Flat Pack - IC, you
can remove it easily. (Fig. S-1-3)
b. Lift e ach lead of the Flat Pack - IC upward one by
one, using a shar p pin or wire to which s older will
not adhere (iron w ire). When h eating the p ins, use
a fine tip soldering iron or a hot air Desoldering
Machine. (Fig. S-1-4)
With Iron Wire:
a. Using desoldering braid, remove the solder from all
pins of the Flat Pack - IC. When you use solder flux
which is applied to all pins of the Flat Pack - IC, you
can remove it easily. (Fig. S-1-3)
b. Affix the wire to a workbench or solid mounting
point, as shown in Fig. S- 1-5.
c. Pull up on the wire a s the sold er melts so as to l ift
the IC leads from the CBA contact pads, while
heating the pins using a fine tip soldering iron or
hot air blower.
Note:
When using a solder ing iron, care must be taken
to ensure that the F lat Pack - IC is not being held
by glue, or when it is removed from the CBA, it
may be damaged if force is used.
Presolder
How to Remove / Install Flat Pack IC
Caution:
1. Do not apply the hot air to the chip parts around the
Flat Pack-IC for over 6 seconds as damage may
occur to the chip par ts. Put Masking Ta pe around
the Flat Pack-IC to protect other par ts from damage. (Fig. S-1-2)
2. Installation
a. Using desoldering braid, remove the solder from
the foil of each pin of the Flat Pack - IC on the CBA,
so you can install a replacement Flat Pack - IC
more easily.
b. T h e "I" mark on the Flat Pack - IC indica tes pin 1
(See Fig. S-1-6). Ma ke sure this mar k m atches the
1 on the CBA when positioning for installation.
Then pre - solder the four corne rs of the Flat PackIC (See Fig. S-1-7).
c. Solder all pins of the Flat Pack - IC. Make sure that
none of the pins have solder bridges.
1-3-2 SFTY_5
Hot Air Blower
Iron Wire
or
CBA
Masking
Tape
Tweezers
Flat Pack-IC
Fig. S-1-1
Hot-air
Flat Pack-IC
Desoldering
Machine
Flat Pack-IC
Fig. S-1-2
Desoldering Braid
To Solid
Mounting Point
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Presolder
Soldering Iron
Fig. S-1-5
Fig. S-1-6
Fine Tip
Soldering Iron
Soldering Iron
Fig. S-1-3
Flat Pack-IC
CBA
Fig. S-1-7
Sharp
Pin
Fig. S-1-4
1-3-3 SFTY_5
Instructions for Handling
Semiconductors
Electrostatic breakdown of the semiconductors may
occur due to a potential dif ference caused by electrostatic charge during unpacking or repair work.
Ground for Human Body
Be sure to wear a grounding b and (1M Ω) that is prop erly grounded to remove any static ele ctr icity that may
be charged on the body.
Ground for Work Bench
Be sure to place a conductive sheet or copper plate
with proper grounding (1MΩ) on the work bench or
other surface, where the semiconductors are to be
placed. Because the static electricity charge on the
clothing will not escape through the body grounding
band, be careful to avoid contacting semiconductors to
clothing.
<Incorrect>
<Correct>
1MΩ
CBA
Grounding Band
1MΩ
CBA
Conductive Sheet or
Copper Plate
1-3-4 SFTY_5
PREPARATION FOR SER VICING
How to Enter the Service Mode
Caution: 1
1. Optical sensors system are used for T ape Start and
End Sensor on this equipment. Read this page
carefully and prepare as described on this page
before starting t o service; otherwis e, the unit may
operate unexpectedly.
Preparing: 1
1. Cover Q202 (START SENSOR) and Q201 (END
SENSOR) with Insulation Tape or enter the service
mode to activate Sensor Inhibition automatically.
Note: Avoid playing, rewinding or fast forwarding the
tape to its beginn ing or end, because bot h Tape En d
Sensors are not active.
How to Enter the Service Mode
1. Turn power on.
2. Use ser vice remote cont rol unit and press WAKEUP/SLEEP key. (See page1-7-1)
3. When en tering the ser vice mode, one o f the number (1, 2 or 4) will display at corners of the screen.
4. During the service mode, electrical adjustment
mode can be selected by remote control key. (Service remote control unit).
Details are as follows.
Key Adjustment Mode
Picture adjustment mode: Press the
MENU button to change from BRT
(Bright), *CNT (Contrast), *COR
MENU
0
1 No need to use.
2
3 No need to use.
4
5
(Color), *TNT(Tint) and *V-T. Press
CH UP/DOWN key to display Initial
Value. Maximum and Minimum cyclically. *Marked items are not necessary to adjust normally.
C-Trap and Y DL Time/Y SW LPF
adjustment mode: See adjustment
instructions pages 1-7-2 & 1-7-3.
H adjustment mode: See adjustment
instructions page 1-7-2.
Auto record mod e: Perform recording
(15 Sec.)-->Stop-->Rewind (Zero
return) automatically.
Head switching point adjustment
mode: See adjustment instructions
page 1-7-5.
Key Adjustment Mode
6 No need to use.
Purity check mode: Shows Red,
7
8
9
VOL p Cut-off Adjustment 1-7-4.
Caution: 2
1. Th e deck mechanism assembly is mounte d on the
Main CBA directly, and SW211 (REC-SAFETY
SW) is mounted on the Main CBA. When deck
mechanism assembly is removed from the Main
CBA due to ser vicing, this switch can n ot be operated automatically.
Green, Blue or White cyclically on the
screen each time the “7” key is
pressed.
H. Shift adjustment mode: See adjustment instructions page 1-7-4.
V. size/V. shift adjustment: See
adjustment instructions page 1-7-3.
Preparing: 2
1. To eject the tape, press the STOP/EJECT button
on the unit (or Remote Control).
2. When you want to record during the Service mode,
press the Rec button while depressing SW211
(REC-SAFETY SW) on the Main CBA.
Q201
(END SENSOR)
SW211
(REC-SAFETY SW)
Q202
(START SENSOR)
MAIN CBA
1-4-1 T4403PFS
VIDEO AUDIO
STOP/EJECT
REW PLAY F.FWD V OLUME CHANNEL
EARPHONE
REC/OTR
POWER
REC
1 92 3 4 5 6 7 8 12 1310 11 14
POWER
WAKE-UP
/SLEEP
123
456
789
+100
0
EJECT
CHANNEL
RETURN
REW
PLAY
STOP
F.FWD
GAME
RECORD
PAUSE/STILL
SPEED
TIME SEARCH
CHANNEL
T-PROG.
CLEAR
COUNTER
RESET
DISPLAY MUTE
MENU
VOLUME
5
15
12
6
16
7
10
18
19
20
6
24
11
9
8
22
21
23
17
25
ff.
,
k
-
)
1
2
3
4
signals from the remote control.
OPERATING CONTROLS AND FUNCTIONS
- TV/VCR FRONT PANEL -
- REMOTE CONTROL -
VIDEO input jack– Connect to the video output
jack of your video camera or another VCR.
AUDIO input jack– Connect to the audio output
jack of your audio equipment, video camera or
another VCR.
RECORD indicator– Flashes during recording.
Lights up in the Stand-by mode for Timer
Recording.
Remote Sensor Window– Receives the infrared
5 POWER button– Press to turn TV/VCR on and o
Press to activate timer recording.
6
STOP button– Press to stop the tape motion.
EJECT button– Press in the Stop mode to remove
tape from TV/VCR.
button–
L
Press to select setting modes from the on screen
•
menu.
Press to enter digits when setting program.
•
(for example: setting clock or timer program)
REW button– Press to rewind the tape, or to view
7
the picture rapidly in reverse during playback
mode. (Rewind Search)
s
button–
Press to select a mode from a particular menu.
•
(for example: LANGUAGE or USER’S SET UP)
PLAY button– Press to begin playback.
8
button–
K
Press to select setting modes from the on screen
•
menu.
Press to enter digits when setting program.
•
(for example: setting clock or timer program)
F.FWD button– Press to rapidly advance the tape
9
or to view the picture rapidly in forward during
playback mode. (Forward Search)
button–
B
When setting program (for example: setting cloc
•
or timer program), press to determine your selec
tion and proceed to the next step you want to
input.
Press to determine setting modes from on screen
•
menu.
Press to select a mode from a particular menu.
•
(for example: LANGUAGE or USER’S SET UP
1-5-1 T4400IB
- REAR VIEW -
26
27
28
1
1
X
Y
1
1
1
1
1
1
screen.
r
l
c-
to
-
.
0 REC button– Press for manual recording.
OTR button– Activates One Touch Recording.
(only on the TV/VCR)
X
1 VOLUME
Y
/
buttons– Adjust the volume
level.
2 CHANNEL K / L buttons– Press to select the
desired channels for viewing or recording.
You may display the main menu on the TV screen
by pressing repeatedly this button on the
TV/VCR.
TRACKING function– Press to minimize video
‘noise’ (lines or dots on screen) during playback
mode.
3 EARPHONE jack– Connects to earphones (not
supplied) for personal listening. The size of jack is
1/8” monaural (3.5mm).
4 Cassette compartment
5 Number buttons– Press to select desired channels
for viewing or recording. To select channels from
1 to 9, first press the 0 button and then 1 to 9.
+100 button– When selecting cable channels
which are higher than 99, press this button first,
then press the last two digits. (To select channel
125, first press the “+100” button then press “2”
and “5”.)
6 MENU button– Press to display the main menu on
the TV screen.
7 DISPLAY button– Display the counter or the cur-
rent channel number and current time on the TV
18 SPEED button– Press to choose the desired
recording speed:SP/SLP.
19
T-PROG. CLEAR button– Press to cancel a set-
ting of timer program.
COUNTER RESET button– Press to reset counte
to 0:00:00.
GAME button– Sets the game mode and externa
20
input mode at the same time.
TIME SEARCH button– Press to activate Time
21
Search mode.
22
PAUSE/STILL button– Press to temporarily stop
the tape during the recording or to view a still pi
ture during playback.
MUTE button– Mutes the sound. Press it again
23
resume sound.
CHANNEL RETURN button– Press to go back to
24
the previously viewed channel. For example,
pressing this button once will change channel dis
play from 3 (present channel) to 10 (previously
viewed channel), and pressing it a second time
will return from 10 to 3.
25
WAKE-UP/SLEEP button– Sets the Wake up or
Sleep Timer.
ANT. terminal– Connect to an antenna or cable
26
system.
27
DC 13.2V jack– Connect to the Car Battery Cord
28 Power cord– Connect to a standard AC outlet
(120V/60Hz).
1-5-2 T4400IB
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart
This flowchart indicates the disassembly steps for the
cabinet par ts, and the CBA in order to gain access to
item(s) to be ser viced. When reassembling, follow the
steps in reverse order. Bend, route and dress the
cables as they were.
[1] REAR CABINET
[2] VCR CHASSIS UNIT
[3] POWER SUPPLY
CBA UNIT
[5] POWER SUPPLY
CBA
[4] TRAY CHASSIS UNIT
[6] DECK UNIT
[7] MAIN CBA
[8] CRT
2. Disassembly Method
REMOVAL
ID/
LOC.
No.
[1]
[2]
[3]
[4]
[5]
[6] Deck Unit 3, 5
[7] Main CBA 3, 5 3(S-8) 6
[8] CRT 4 4(S-9) 7
↓
(1)
PART
Rear
Cabinet
VCR
Chassis
Unit
Power
Supply
CBA Unit
Tray
Chassis
Unit
Power
Supply
CBA
↓
(2)
REMOVE/
*UNHOOK/
Fig.
UNLOCK/RELEASE/
No.
UNPLUG/
DESOLDER
1, 2 4(S-1), (S-2), (S-3) 1
Anode Cap, CN505,
3,4,
CRT CBA, CL601,
5
CN801, CN571
3, 5 3(S-4), CN602 3
3 ---------- -
3, 5 4(S-5) 4
7(S-6), 2(S-7),
Desolder (CL201,
CL401, CL402,
CL403)
↓
(3)
↓
(4)
Note
(5)
2
5
↓
(1): Order o f steps in Procedu re. When reassembling ,
follow the steps in reverse order.These numbers
are also used as the identific ation (lo cation ) No. of
parts in Figures.
(2): Parts to be removed or installed.
(3): Fig. No. showing Procedure of Part Location.
(4): Identification of part to be removed, unhooked,
unlocked, released, unplugged, unclamped, or
desoldered.
S=Screw, P=Spring, L=Locking Tab, CN=Connec-
tor, *=Unhook, Unlock, Release, Unplug, or
Desolder
2(S-2) = two Screw (S-2)
(5): Refer to the following"Reference Notes in the
Table" following.
Reference Notes in the Table
1. Removal of the Rear Cabinet.
Remove Screws 4(S-1), Screw (S-2) and Screw
(S-3).
Caution !!
Caution !!
When removing the CRT, be sure to discharge the
Anode Lead of the CRT with the CRT Ground Wire
before removing the Anode Cap.
2. Removal of the Tray Chassis.
Discharge the Anode Lead of the CRT with the
CRT Ground before removing the Anode Cap.
Disconnect the following: Anode Cap, CN505, CRT
CBA, CL601, CN571 and CN801. Then, pull the
Tray Chassis backward.
3. Removal of the Power Supply CBA Unit.
Remove Screws 3(S-4) and disconnect connec tor
CN602.
4. Removal of the Power Supply CBA.
Remove Screws 4(S-5).
5. Removal of the Deck Unit.
Remove Screws 7(S-6) and 2(S-7). Then, desolder
connectors (CL201, CL 401 , CL40 2, CL 403 ) and l if t
up the Deck Unit.
6. Removal of the Main CBA.
Remove Screws 3(S-8) and pull up the Main CBA.
7. Removal of the CRT.
Remove Screws 4(S-9) and pull the CRT backward.
1-6-1 T4404DC
S-1
S-3
[1] REAR CABINET
S-2
S-1
S-1
S-1
Fig. 1
S-1
S-3
S-2
S-1
[1] REAR CABINET
Fig. 2
1-6-2 T4404DC
[4] TRAY CHASSIS UNIT
S-6
S-6
[7] MAIN
CBA
S-6
[6] DECK UNIT
S-8
S-8
S-8
S-4
[3] POWER
SUPPLY
CBA UNIT
[5] POWER
SUPPLY
CBA
S-5
S-5
S-7
S-4
S-7
S-9
[2] VCR CHASSIS UNIT
Fig. 3
1-6-3 T4404DC
[8] CRT
ANODE CAP.
CRT CBA
S-9
S-9
S-9
S-9
Fig. 4
1-6-4 T4404DC
CRT CBA
CRT
TO SPEAKER
MAIN CBA
ANODE
CN801
GND
CL403
CL401
CL502B
CL502A
CL501A
CN505
CL601
TO DEGAUSS
COIL
SCREEN
FOCUS
FE HEAD
CL201
CYLINDER
ASSEMBLY
CL402
CL501B
AC HEAD
ASSEMBLY
WH1951A
CN602
DC POWER
SUPPLY CBA
CN571
CAPSTAN
MOTOR
DECK UNIT
Fig. 5
1-6-5 T4404DC
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note:
"CBA" is abbreviation for "Circuit Board
Assembly."
NOTE:
Electrical a djustments are requ ired after replacing
circuit components and certain mechanical parts.
It is importan t to perform these adjustments only
after all repairs and replac em ents have been completed.
Also, do not attempt these adjus tments u nle ss the
proper equipment is available.
Test Equipment Required
1. NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)
2. AC Milli Voltmeter (RMS)
3. Alignment Tape (FL8A, FL8N), Blank Tape
4. DC Voltmeter
5. Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div,
F-Range : DC~AC-60MHz
6. Frequency Counter
7. Plastic Tip Dr i ver
How to make service remote control
unit:
1. Prepare remo te control uni t. (Part No. N0107UD or
N0150UD)
Remove 3 screws from the back lid. (Fig. 1-1)
SCREW
How to Set up the Service mode:
Service Mode:
1. Use the service remote control unit.
2. Turn the power on.
3. Pr ess " WAKE-UP/SLE EP " button on the service
remote control unit.
1a. DC 117V (+B) Adjustment
(AC Power)
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dar k and
unit does not operate correctly.
Test point Adj. Point Mode Input
TP601
(+B)
TP602
(GND)
Tape M. EQ. Spec.
---
Note: TP601(+B), TP602(GND), VR601 --- Main CBA
1. Connect the unit to AC Power Outlet.
2. Connect DC Volt Meter to TP601(+B) and
TP602(GND).
3. Adjust VR601 so that the voltage of TP601(+B)
becomes +117±0.5V DC.
VR601 --- -----
DC Voltmeter
Plastic Tip Driver
+117±0.5V DC
Remote control unit (Bottom)
2. Remote control unit: Part No. N0107UD
Add J1 (Jumper Wir e) to the remote cont rol CBA.
(Fig. 1-2)
J 1
J 1
Remote control CBA
Remote control CBA
Remote control unit: Part No. N0150UD
Cut off pin 10 of the remote cont rol m icro proc es sor
and short circuit pins 10 and 17 of the microprocessor with a jumper wire.
Note: The attached remote control unit can not be
used as service remote control unit.
Fig. 1-1
Fig. 1-2
Fig. 1-2
1-7-1 T4403EA
1b. DC 117V (+B) Adjustment
3. C-Trap Adjustment
(DC Power)
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dar k and
unit does not operate correctly.
Test point Adj. Point Mode Input
TP601
(+B)
TP602
(GND)
Tape M. EQ. Spec .
---
Note: VR1951 --- HV/DC Power Supply CBA
TP601(+B), TP602(GND) --- Main CBA
1. Input 13.2V DC to DC Jack.
2. Connect DC Volt Meter to TP601(+B) and
TP602(GND).
3. Adjust VR1951 so that the voltage of TP601(+B)
becomes +117±0.5V DC.
VR1951 --- -----
DC Voltmeter
Plastic Tip Driver
+117±0.5V DC
2. H Adjustment
Purpose: To get correct horizontal position and size of
screen image.
Symptom of Misadjustment: Horizontal position and
size of screen image may not be properly displayed.
Test point Adj. Point Mode Input
D304
CATHODE
Tape M. EQ. Spec.
CH o / p
buttons
Video ---
Purpose: To get minimum leaka ge of the color signal
carrier.
Symptom of Misadjustment: If C-Trap Adjustment is
incorrect, stripes will appear on the screen.
Test point Adj. Point Mode Input
J271
Tape M. EQ. Spec.
---
minimum
Note: J271--- Main CBA
1. Connect Oscilloscope to J271.
2. Input a color bar signal from RF input.
Enter the Service mode. (See page 1-4-1.)
3. Press "0" button on the remote control unit and
select C-TRAP Mode.
4. Press CH o / p buttons on the remote control uni t
so that the carrier leaka ge B-Out (3.58MHz) value
becomes minimum on the oscilloscope.
5. Turn the power off and on again.
CH o / p
buttons
Oscilloscope
Pattern Generator
Figure
--- Color Bar
---
Fig. 2
--- Frequency Counter 15.734kHz±300Hz
Note: D302 CATHODE --- Main CBA
1. Connect Frequency Counter to D304 CATHODE.
2. Set the unit to the VIDEO mode and no input is
necessary. Enter the Service mode.
(See page 1-4-1.)
3. Operate the unit for at least 20 minutes.
4. Press "2" button on the remote control unit and
select H-Adj Mode.
5. Press CH o / p buttons on the remo te cont rol un it
so that the display will change "0" to "7."
At this moment, cho ose di splay "0" to "7" when the
Frequency counter display is closest to
15.734kHz±300Hz.
6. Turn the power off and on again.
1-7-2 T4403EA
4. Y DL Time/Y SW LPF Adjustment
5. V. Size Adjustment
Purpose: To get minimum leakag e of the color signal
carrier.
Symptom of Misadjustment: If Y DL Time Adjust-
ment is incorrect, stripes will appear on the screen.
1. Enter the Service Mode. (See page 1-4-1.)
2. Y DL Time Adjustment: Press "0" button on the
service remot e cont rol uni t twice to sh ow "D-T " on
the display.
Y SW LPF Adjustment: Press "0" button on the
service remote control unit four times to show
"Y SW" on the display.
3. Y DL Time Adjustment: Select "2" by pressing
"CH o / p" buttons on the service remote control
to enter Y DL Time Adjustment mode.
Y SW LPF Adjustment: Select "1" by pressing
"CH o / p" buttons on the service remote control
to enter Y SW LPF Adjustment mode.
4. If needed, perform the following.
C-TRAP Adjustment (Factory mode)
"0"
button
C-TRP 0 C-TRP 1
CH
button
Purpose: To obtain correct vertical height of screen
image.
Symptom of Misadjustment: If V. Size is incorrect,
vertical height of image on the screen may not be
properly displayed.
Test point Adj. Point Mode Input
---
CH o / p
buttons
--- Monoscope
Tape M. EQ. Spec.
--- Pattern Generator 90±5%
1. Enter the Service mode. (See page 1-4-1.)
Press "9" button on the remote control unit and
select V-S Mode. (Press "9" button then display will
change to V-P and V-S).
2. Input monoscope pattern.
3. Press CH o / p buttons on the remote control uni t
so that the monosc ope pa tter n is 90±5% of di splay
size and the circle is round.
6. V. Shift Adjustment
CH
button
"0" button
Y DL Time Adj TV Adjustment
CH
D-T TV 0 D-T TV 1
"0" button
button
CH
button
Y DL Time Adj EXT/PB Adjustment
CH
D-T EXT 0 D-T EXT 1
"0" button
button
CH
button
Y SW LPF Adjustment
CH
Y SW
button
0 Y SW 1
Purpose: To obtain c orrect vert ical position of screen
image.
Symptom of Misadjustment: If V. position is incorrect, vertica l position of image on the screen may not
be properly displayed.
Test point Adj. Point Mode Input
---
CH o / p
buttons
--- Monoscope
Tape M. EQ. Spec.
--- Pattern Generator 90±5%
1. Enter the Service mode. (See page 1-4-1.)
Press "9" button on the remote control unit and
select V-P Mode. (Press "9" button then display will
change to V-P and V-S).
2. Input monoscope pattern.
3. Press CH o / p buttons on the remote control uni t
so that the top and bottom of the monoscope pattern are equal to each other.
CH
button
1-7-3 T4403EA
7. H. Shift Adjustment
Purpose: To obtain correct horizontal position and
size of screen image.
Symptom of Misadjustment: Horizontal position and
size of screen image may not be properly displayed.
Test point Adj. Point Mode In put
---
Tape M. EQ. Spec.
--- Pattern Generator 90±5%
1. Enter the Service mode. (See page 1-4-1.)
Press "8" button on the remote control unit and
select H-P Mode.
2. Input monoscope pattern.
3. Press CH o / p buttons on the remo te cont rol un it
so that the left and right side of the monoscope pattern are equal to each other.
4. Turn the power off and on again.
CH o / p
buttons
--- Monoscope
8. Cut-off Adjustment
Purpose: To adjust the beam curr ent of R, G, B, and
screen voltage.
Symptom of Misadjustment: White color may be
reddish, greenish or bluish.
Test point Adj. Point Mode Input
Black
--- Screen-Control Ext.
Raster /
White
Raster
Notes: Screen Control FBT --- HV/DC Power Supply
CBA
F.B.T= Fly Back Transformer
Use the Remote Control Unit
1. Degau ss the CRT and allow CRT to operate for 20
minutes before starting the alignment.
2. Set t he screen control to minimum position. Input
the Black raster signal from RF input.
3. Enter the Service Mode. (See page 1-4-1.)
Dimmed horizontal line appear s on the CRT.
4. Press the "VOL p" button.
(Press "V O L p" then display will change CUT OFF/
DRIVE, VCO adjustment, Analog OSD adjustment).
5. Choose CUT OFF/DRIVE Mode then press "1" button. This adjustment mode is CUT OFF (R).
6. Press the "CH o / p" button until the horizontal line
becomes white.
7. Choose CUT OFF/DRIVE mode then press "2" button. This adju stment m ode is CUT OF F (G). Press
"CH o / p" until the horizontal line becomes white.
8. Choose CUT OFF/DRIVE Mode then press "3" button. This adjustment mo de is CUT OFF (B). Press
"CH o / p" until the horizontal line becomes white.
9. Input the White Raster Signal from Video In.
10.Choose CUT OFF/DRIVE mode then press "4."
Adjust the RED DRIVE as needed with the CH o /
p buttons to get the following value, X= 286, Y=
294.
11.Choose CUT OFF/DRIVE mode then press "5."
Adjust the BLUE DRIVE as needed with the CH o /
p buttons to get the following value, X= 286.
12.Turn the power off and on again.
Ta pe M. EQ. Spec.
--- Pattern Generator
Figure
PATTERN GENERATOR
EXT. INPUT
See Reference
Notes below
Fig. 3
1-7-4 T4403EA
9. Sub-Brightness Adjustment
10. Focus Adjustment
Purpose: To get proper brightness.
Symptom of Misadjustment: If Sub-Brightness is
incorrect, proper brightness cannot be obtained by
adjusting the Brightness Control.
Test point Adj. Point Mode Input
---
Tape M. EQ. Spec.
---
White
Note: SYMPTE Setup level --- 7 IRE
1. Enter the Service Mode. (See page 1-4-1.)
Then input SYMPTE signal from RF input.
2. Press MENU button. (Press MENU button then display will change B R T, C N T, COL, T N T, V-T and
SHP). Select BRT and press CH o / p buttons so
that the bar is just visible (See above figure).
3. Turn the power off and on again.
CH o / p
buttons
Pattern
Generator
Figure
---
SYMPTE
7.5 IRE
See below
Black
This bar
just
visible
Fig. 4
Purpose: Set the optimum Focus.
Symptom of Misadjustment: If Focus Adjus tment is
incorrect, blurred images are shown on the display.
Test point Adj. Point Mode Input
--- Focus Control --- Monoscope
Tape M. EQ. Spec.
--- Pattern Generator See below.
Note: Focus VR (FBT) --- MAIN CBA
FBT= Fly Back Transformer
1. Operate the unit more than 30 minutes.
2. Face the unit to the East and degauss the CRT
using a Degaussing Coil.
3. Input the monoscope pattern.
4. Adjust the Fo cu s Co nt r ol on th e F B T t o ob t a in cl ear
picture.
11. Head Switching Position Adjustment
Purpose: Deter mine the Head S witching Point during
Playback.
Symptom of Misadjustment: May cause Head
Switching Noise or Vertical Jitter in the picture.
Note: Unit reads Head Switching Position automati-
cally and displays it on the screen (Upper Left Corner).
1. Playback test tape (FL8A, FL8N).
2. Enter the Service Mode. (See page 1-4-1.)
Then press the number 5 button on the remote
control unit.
3. The Head Switching position will display on the
screen; if adjustment is necessary follow step 4.
6.5H(412.7µs) is preferable.
4. Press "CH o" or "C H p" button on the remote control unit if necessar y. The value will be ch anged in
0.5H steps up or down. Adju stable range is up to
9.5H. If the value is beyond adjustable range, the
display will change as:
Lower out of range: 0.0H
Upper out of range: -.-H
5. Turn the power off and on again.
12. CCS Text Box Location
When replacing the CRT, the CCS Box might not stay
in appropriate position. Then, replace micro computer.
Note: This adjustment automatically done by the
microcomputer.
1-7-5 T4403EA
The following 2 adjustments normally are not
attempted in the field. They should be done
only when replacing the CRT then adjust as a
preparation.
13. Purity Adjustment
Purpose: To obtain pure color.
Symptom of Misadjustment: If Color Purity Adjust-
ment is incorrect, large areas of color may not be
properly displayed.
Test point Adj. Point Mode Input
---
Tape M. EQ. Spec.
--- Pattern Generator See below.
Deflection Yoke
Purity Magnet
Figure
--- *Red Color
14. Convergence Adjustment
Purpose: To obtain pro per convergence of red, green
and blue beams.
Symptom of Misadjustment: If Convergence Adjust-
ment is incorrect, the edge of white letters may have
color edges.
Test point Adj. Point Mo de Input
C.P. Magnet (RB),
---
C.P. Magnet (RB-G),
Deflection Yoke
Tape M. EQ. Spec.
--- Pattern Generator See below.
Figure
CRT
COIL
PURITY
SCREW
RB
---
RB-G
RING LOCK
Dot Pattern
or
Crosshatch
SCREW
GREEN
RED
BLUE
Fig. 5
* This becomes RED COLOR if push 7KEY with a
service mode.
1. Set the unit facing east.
2. Operate the u nit for over 30 minutes before adjusting.
3. Fully deg auss the unit using an external degaussing coil.
4. Set the unit to the AUX Mode which is located
before CH2 then input a red raster from video in.
5. Loosen the screw on the Deflecti on Yoke Cla mper
and pull the Deflection Yoke back away from the
screen. (See Fig. 6.)
6. Loosen t he Ring Lock and adjust the Purity Mag nets so that a red field is obtained at the center of
the screen. Tighten Ring Lock. (See Fig. 5,6.)
7. Slowly push the Defle ction Yoke toward the bell of
the CRT and set it where a uniform red field is
obtained.
8. Tighten the clamp screw on the Deflection Yoke.
DY WEDGE
COIL CLAMPER
DEFLECTION YOKE
C.P. MAGNET (RB)
R
G
B
C.P. MAGNET (RB-G)
RB
G
C.P. MAGNET
CLAMPER
C.P. MAGNET
RB
Fig. 6
R
G
B
Fig. 7
G
Fig. 8
1-7-6 T4403EA
1. Set the unit to the AUX Mode which is located
before CH2 then input a Dot or crosshatch pattern.
2. Loosen the Ring Lock and align red with blue dots
or Crosshatch at the ce nter of the screen by rotating (RB) C.P. Magnets. (See Fig. 7.)
3. Align red / blue with green dots at the c enter of the
screen by rotating (RB-G) C.P. Magnet.
(See Fig. 8.)
4. Fix the C.P. Magnets by tightening the Ring Lock.
5. Remove the DY Wedges and slig htl y tilt the Deflection Yoke horizontally and vertically to obtain the
best overall convergence.
6. Fix the Deflection Yoke by carefully inserting the
DY Wedges between CRT and Deflection Yoke.
1-7-7 T4403EA
Servo/System Control Block Diagram
(DECK ASSEMBLY)
AC HEAD ASSEMBLY
CL402
CONTROL
HEAD
CYLINDER ASSEMBLY
PG
SENSOR
DRUM
MOTOR
M
LOADING
MOTOR
5 5CTL(+)
6 6CTL(-)
M
BLOCK DIAGRAMS
MAIN CBA
Q202 Q206
SENSOR CBA
(ST-SENSOR)
CAPSTAN MOTOR
CAPSTAN
MOTOR
Q201
END-SENS.
SENSOR CBA
(END-SENSOR)
M
C-CONT
D-CONT
TIMER+5V
CL201
1P-ON+12V
2P-ON+5V(2)
3C-FG
4C-F/R
5
6FG-GND
7LD-CONT
8
9D-PFG
10M-GND
11D/L+12V
12D/L+15V
D203
S-LED
T-REELST-SENS.
AL+5V
SW212
LD-SW
RS201
WF3
CTL
Q205
RESET
REMOTE
SENSOR
TP201
P-ON+12V
P-ON+5V
D/L+12V
DEF+B
IC201
(SERVO/SYSTEM CONTROL)
KEY 0
KEY 1
REMOTE
14
CTL AMP-OUT
97
95
CTL(+)
CTL(-)
94
LD-SW1
ST-SENS.
9
7
END-SENS.
T-REEL
80
34
RESET
C-FG
87
C-F/R66
C-CONT
76
LD-CONT82
D-CONT77
D-PFG
90
P-ON-H
P-DOWN
REC LED
REC LED 22
I2C-OPEN
C-SYNC
EXT-L
SP-MUTE
A-MUTE
D-REC-H
REC-SAFETY
REC/EE/PB
DV-SYNC
V-ENV
ROTA
RF-SW
SP/LP/SLP 28
EXT-H/INSEL 29
RENTAL 30
SPL-PLAY
SCL
SDA
AFT
31
84
23
71
72
45
74
20
12
65
44
33
27
13
10
15
18
32
SW201 SW204,SW206
5
6
8
KEY
SWITCH
SW205,SW207 SW210
KEY
SWITCH
D204 REC
SW211
REC
SAFETY
P-ON-H
P-DOWN
FROM/TO POWER
SUPPLY BLOCK
(MEMORY)
IC202
SCL
6
5
SDA
CS
7
SCL
SDA
C-SYNC
EXT-L
SCL
SDA
SP-MUTE
A-MUTE
D-REC-H
EXT-H/INSEL
REC/EE/PB
REC/EE/PB
DV-SYNC
V-ENV
ROTA
RF-SW
SP/LP/SLP
EXT-H/INSEL
RENTAL
SPL-PLAY
AFT
AL+5V
FROM/TO
CHROMA/TUNER
BLOCK
FROM/TO
AUDIO BLOCK
FROM/TO
VIDEO BLOCK
1-8-1 1-8-2 T4400BLS
Video Block Diagram
REC VIDEO SIGNAL PB VIDEO SIGNAL MODE: SP/REC
TO CHROMA/
TUNER BLOCK
FROM/TO CHROMA/
TUNER BLOCK
JK701
REAR V-IN
VIDEO
TU-VIDEO
LINE-VIDEO
WF5
TP301
V-OUT
IC401
VIDEO/AUDIO
SIGNAL PROCESS
WF4
42
42
38
TUNER
LINE
V-AGC
Q401
BUFFER
35
6dB
AMP
CHARA
MIX
FBC
R P
Y/C
MIX
MAIN CBA
45 47 49 44
CCD 1H
DELAY
DOC YNR Y/C COMB
CHROMINANCE
SIGNAL PROCESS
Q402
BUFFER
LUMINANCE
SIGNAL PROCESS
FROM
SERVO/SYSTEM
CONTROL BLOCK
(DECK ASSEMBLY)
CYLINDER ASSEMBLY
VIDEO (L) HEAD
VIDEO (R) HEAD
EXT-H/INSEL
RENTAL
REC/EE/PB
SPL-PLAY
ROTA
D-V SYNC
SP/LP/SLP
71
36
RENTAL
REC/EE/PB
16
73
TRICK
ROTA
14
D-V SYNC
39
SP/LP/SLP
59
CL401
V(L)
3
V-COM
2
V(R)
1
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
WF1
RF-SW
V-ENV
J274
RF-SW
88
89
90
91
13
93
AGC
AMP
R
L
R
HPF
P
ENV
DET
74
TP402
V-ENV
WF6
1-8-3 1-8-4 T4400BLV
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