I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA’s
I Exploded Views
I Parts List
9" COLOR TV/VCR COMBINATION
When servicing the deck
mechanism, refer to MK12.5 Deck
Mechanism Section.
Deck Mechanism Part No.:
N2226FT
SC309E/6309CE
Page 2
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 are effective methods of performing 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 CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Funai could not
possibly know, evaluate and advice the service trade of all conceivable ways
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 procedure or tool which is not
recommended by Funai must first use all precautions thoroughly so that neither his safety nor the safe operation of the equipment will be jeopardized by
the service method selected.
Page 3
MAIN SECTION
9" COLOR TV/VCR COMBINATION
SC309E/6309CE
Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA’s
I Exploded Views
I Parts List
All items are measured across 8Ω resistor at speaker output terminal.
DescriptionConditionUnitNominalLimit
1. Audio Output Power (Max.)(R/P)W0.80.6
2. Audio S/N (W/LPF)(R/P)dB4036
3. Audio Distortion (W/LPF)(R/P)%3.05.0
4. Audio Freq. Response
(-10dB Ref. 1KHz)
Note: Nominal specifications represent the design specifications. All units should be able to approximate these.
Some will exceed and some may drop slightly below these specifications. Limit specifications represent the absolute worst condition that still might be considered acceptable. In no case should 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
1-1-2T4501SP
Page 6
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the factory, our products are strictly inspected for 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.
Safety Precautions for TV Circuit
1. Before returning an instrument to the custom-
er, always 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 are provided on this chassis
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 put back in place all
protective devices, including but not limited to,
nonmetallic control knobs, insulating fishpapers,
adjustment and compartment 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 across the two AC plug prongs.
Place the instrument AC switch in the on position.
Connect one lead of an ohmmeter to the AC plug
prongs tied together and touch the other ohmmeter 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 megohm or greater than 5.2 megohm, an abnormality exists that must be corrected
before the instrument is returned to the customer.
Repeat this test with the 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 during this test.) Use a leak-
age current tester or a metering system that complies with American National Standards Institute
(ANSI) C101.1 Leakage Current for Appliances
and Underwriters Laboratories (UL) 1410, (50.7).
With the instrument AC switch first in the on position and then in the off position, measure from a
known earth ground (metal water pipe, conduit,
etc.) to all exposed metal parts of the instrument
(antennas, handle brackets, metal cabinet, screw
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 in the outlet
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 NOT 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 is the primary potential source of
X-radiation in solid-state TV receivers, it is specially constructed to prohibit X-radiation emissions.
For continued X-radiation protection, 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 measured each time servic-
1-2-1SFTY_2
Page 7
ing is performed that involves B+, horizontal deflection or high voltage. Correct operation of the
X-radiation protection circuits also must be reconfirmed each time they are serviced. (X-radiation
protection circuits also may be called "horizontal
disable" or "hold down.") Read and apply the high
voltage limits and, if the chassis is so equipped,
the X-radiation protection circuit specifications given on instrument labels and in the Product Safety
& X-Radiation Warning note on the service data
chassis schematic. High voltage is maintained
within specified limits by close tolerance safety-related components/adjustments in the high-voltage
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 the receiver cabinet, 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 modifications and the addition of items such as auxiliary audio and/or video
output connections, might alter the safety characteristics of this receiver and create a hazard to the
user. Any design alterations or additions will void
the manufacturer's warranty 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 picture tube only with one of
the same type number. Do not remove, install, or
otherwise handle the picture tube in any manner
without first putting on shatterproof goggles
equipped with side shields. People not so
equipped must be kept safely away while picture
tubes are handled. Keep the picture tube away
from your body. Do not handle the picture tube by
its neck. Some "in-line" picture tubes are equipped
with a permanently attached 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 conductor of the AC power cord
and maybe safety-serviced without an isolation
transformer only if the AC power plug is inserted
so that the chassis is connected to the ground side
of the AC power source. To confirm that the AC
power plug is inserted 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 chassis 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 source, for both personnel and
test equipment protection.
c. Some TV receiver chassis have a secondary
ground system in addition to the main chassis
ground. This secondary ground system is not isolated 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 dress in the following areas: a.
near sharp edges, b. near thermally hot parts-be
sure that leads and components do not touch thermally hot parts, c. the AC supply, d. high voltage,
and e. antenna wiring. Always inspect in all areas
for pinched, out of place, or frayed wiring. Check
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 original specifications. Additionally,
determine the cause of overheating and/or damage and, if necessary, take corrective action to remove any potential safety hazard.
8. Product Safety Notice - Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual
inspection, nor can the protection they give necessarily be obtained by replacing 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 shock, fire, and/or
other hazards. The Product's Safety is under review continuously and new instructions are issued
whenever appropriate. Prior to shipment from the
factory, our products are strictly inspected to confirm 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.
1-2-2SFTY_2
Page 8
Precautions during Servicing
A. Parts identified by the ( # ) symbol are critical for
safety.
Replace only with part number specified.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations applying to spurious radiation. 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 about the terminals before soldering.
F. Observe that the wires do not contact heat produc-
ing parts (heatsinks, oxide metal film resistors, fusible resistors, 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 connector by cutting 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 insulation from the ends
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 tool to crimp the metal sleeve 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, first, disconnect the AC plug from AC supply socket.
1-2-3SFTY_2
Page 9
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. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between soldered 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 VoltageRegion
110 to 130 V
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
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 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 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 VoltageRegionLoad ZLeakage 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
1-2-4SFTY_2
i≤0.5mA rms
Exposed accessible
parts
Page 10
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 indicated
as shown:
Pin 1
3. The 1st pin of every pin connector are indicated as
shown:
Pin 1
Input
In
Bottom View
5
10
Instructions for Connectors
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.
Pb (Lead) Free Solder
Pb free mark will be found on PCBs used Pb free
solder. (Refer to figure.) For PCBs with Pb free
mark, be sure to use Pb free solder. For PCBs
without Pb free mark, use standard solder.
(Top View)
(Top View)
1. When you connect or disconnect FFC cable (connector), be sure to disconnect the AC cord.
2. FFC cable (connector) 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 ]
Pb free mark
Replacement Procedures for
Leadless (Chip) Components
The Following Procedures are Recommended for the Replacement of the Leadless Components Used in this Unit.
1. Preparation for replacement
1.1. Pb free solder
a. Soldering Iron
Use a soldering iron for Pb free solder.
b. Solder
Be sure to use Pb free solder.
c. Soldering time
Do not apply heat for more than 4 seconds.
1-3-1SFTY_Z13N
Page 11
d. Preheating
Leadless capacitor must be preheated before
installation. (130°C~150°C, for about two minutes.)
1.2. Standard solder
a. Soldering Iron
Use a pencil-type soldering iron (less than 30
watts).
b. Solder
Eutectic solder (Tin 63%, Lead 37%) is recommended.
c. Soldering time
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.
Tweezers
Chip
Soldering Iron
Soldering Iron
Tweezers
Solder
Soldering Iron
Notes:
a. Do not attempt 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 the part downward with tweezers and solder
both electrodes as shown below.
Note:
Do not glue the replacement leadless component to
the circuit board.
Presolder
1-3-2SFTY_Z13N
Page 12
How to Remove / Install Flat Pack IC
Caution:
1. The Flat Pack-IC shape may differ by models. Use
an appropriate hot-air flat pack-IC desoldering
machine, whose shape matches that of the Flat
Pack-IC.
2. 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 parts. Put Masking Tape around
the Flat Pack-IC to protect other parts from damage. (Fig. S-1-2)
3. The Flat Pack-IC on the CBA is affixed with glue, so
be careful not to break or damage the foil of each
pin or solder lands under the 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 Flat 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 each lead of the Flat Pack - IC upward one by
one, using a sharp pin or wire to which solder will
not adhere (iron wire). When heating the pins, 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 as the solder melts so as to lift
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 soldering iron, care must be taken
to ensure that the Flat Pack - IC is not being held
by glue, or when it is removed from the CBA, it
may be damaged if force is used.
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. The "I" mark on the Flat Pack - IC indicates pin 1
(See Fig. S-1-6). Make sure this mark matches the
1 on the CBA when positioning for installation.
Then pre - solder the four corners 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.
Fig. S-1-1
Hot-air
Flat Pack-IC
Desoldering
CBA
Masking
Tape
Tweezers
Flat Pack-IC
Desoldering Braid
Machine
Flat Pack-IC
Fig. S-1-2
Soldering Iron
Fig. S-1-3
1-3-3SFTY_Z13N
Page 13
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-4
Hot Air Blower
Iron Wire
Soldering Iron
Presolder
Flat Pack-IC
CBA
Fig. S-1-7
or
To Solid
Mounting Point
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-5
Fig. S-1-6
1-3-4SFTY_Z13N
Page 14
Instructions for Handling
Semiconductors
Electrostatic breakdown of the semiconductors may
occur due to a potential difference caused by electrostatic charge during unpacking or repair work.
Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity 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
1-3-5SFTY_Z13N
Page 15
PREPARATION FOR SERVICING
How to Enter the Service Mode
Caution: 1
1. Optical sensors system are used for Tape Start and
End Sensor on this equipment. Read this page
carefully and prepare as described on this page
before starting to service; otherwise, 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 beginning or end, because both Tape End
Sensors are not active.
How to Enter the Service Mode
1. Turn power on.
2. Use service remote control unit and press WAKEUP/SLEEP key. (See page1-6-1)
3. When entering the service mode, one of 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
KeyAdjustment Mode
Picture adjustment mode: Press the
MENU button to change from BRT
(Bright), *CNT (Contrast), *COL (Color),
MENU
0
*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 TV/Y DL Time
EXT/Y SW LPF/Black Stretch Off/ Black
Stretch CONT/C. Angle adjustment
mode: See adjustment instructions
page 1-6-2 and 1-6-3.
KeyAdjustment Mode
Purity check mode: Shows Red, Green,
7
8
9
VOL p
Caution: 2
1. The deck mechanism assembly is mounted 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 servicing, this switch can not be operated automatically.
Blue or White cyclically on the screen
each time the "7" key is pressed.
H. Shift adjustment mode: See
adjustment instructions page 1-6-4.
V. size/V. shift adjustment: See
adjustment instructions page 1-6-4.
Initial Setting mode: See adjustment
instructions page 1-6-2.
Cut-off Adjustment mode: See
adjustment instructions page 1-6-5.
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
1No need to use.
2
3No need to use.
4
5
6No need to use.
H adjustment mode: See adjustment
instructions page 1-6-2.
Auto record mode: Perform recording
(15 Sec.)-->Stop-->Rewind (Zero
return) automatically.
Head switching point adjustment mode:
See adjustment instructions page 1-6-
6.
1-4-1T4501PFS
Page 16
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart
This flowchart indicates the disassembly steps for the
cabinet parts, and the CBA in order to gain access to
item(s) to be serviced. When reassembling, follow the
steps in reverse order. Bend, route and dress the
cables as they were.
(1): Order of steps in Procedure. When reassembling,
follow the steps in reverse order.These numbers
are also used as the identification (location) 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 Desol-
der
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.
3. Removal of the Power Supply CBA Unit.
4. Removal of the DC Power Supply CBA.
5. Removal of the Deck Unit.
6. Removal of the Main CBA.
7. Removal of the CRT.
##
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.
Remove Screws 4(S-4) and disconnect connector
CN602.
Remove Screws 4(S-5).
Remove Screws 7(S-6), (S-7) and (S-8). Then,
desolder connectors (CL201, CL401, CL402,
CL403) and lift up the Deck Unit.
Remove Screws 5(S-9) and (S-10), and pull up the
Main CBA.
Remove Screws 4(S-11) and pull the CRT backward.
1-5-1T4501DC
Page 17
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
1-5-2T4501DC
Page 18
S-4
[4] TRAY CHASSIS UNIT
S-6
S-6
S-9
[7] MAIN
CBA
S-6
[6] DECK UNIT
S-9
S-9
[3] POWER
SUPPLY
CBA UNIT
[5] DC
POWER
SUPPLY
CBA
S-5
S-9
S-7
S-8
S-4
S-5
S-4
S-10
[2] VCR CHASSIS UNIT
Fig. 3
1-5-3T4501DC
Page 19
[8] CRT
ANODE CAP.
CRT CBA
S-11
S-11
S-11
S-11
Fig. 4
1-5-4T4501DC
Page 20
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
ACE HEAD
ASSEMBLY
WH1951A
CN602
DC POWER
SUPPLY CBA
CN571
CAPSTAN
MOTOR
DECK UNIT
Fig. 5
1-5-5T4501DC
Page 21
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note:
"CBA" is abbreviation for "Circuit Board
Assembly."
NOTE:
Electrical adjustments are required after replacing
circuit components and certain mechanical parts.
It is important to perform these adjustments only
after all repairs and replacements have been completed.
Also, do not attempt these adjustments unless 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 Driver
How to make service remote control
unit:
1. Prepare remote control unit. (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. Press " WAKE-UP/SLEEP " 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 dark and
2. Connect DC Volt Meter to D613 Cathode (+B) and
C613 (GND).
3. Adjust VR601 so that the voltage of D613 Cathode
(+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 Wire) to the remote control 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 control microprocessor
and short circuit pins 10 and 17 of the microprocessor with a jumper wire.
Note: The remote control with the unit cannot be used
as service remote control unit.
Fig. 1-1
Fig. 1-2
Fig. 1-2
1b. DC 117V (+B) Adjustment
(DC Power)
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
unit does not operate correctly.
Test pointAdj. PointModeInput
D613 Cathode
(+B)
C613
(GND)
TapeM. EQ.Spec.
---
Note: VR1951 --- HV/DC Power Supply CBA
D613 Cathode (+B), C613 (GND) --- Main CBA
1-6-1T4501EA
VR1951--------
DC Voltmeter
Plastic Tip Driver
+117±0.5V DC
Page 22
1. Input 13.2V DC to DC Jack.
2. Connect DC Volt Meter to D613 Cathode (+B) and
C613 (GND).
3. Adjust VR1951 so that the voltage of D613 Cathode (+B) becomes +117±0.5V DC.
2. Initial Setting
General
1. Enter the Service mode. (See page 1-4-1)
2. Press "VOL p" button on the service remote control
unit. Display changes "C/D," "7F," "FM," "ACCESS
CODE," "9V," and "RC5" cyclically when "VOL p"
button is pressed.
3. To set each data value shown below, press "CH o
/ p" buttons on the service remote control unit.
7F --- Set to "FF."
4. C-Trap Adjustment
Purpose: To get minimum leakage of the color signal
carrier.
Symptom of Misadjustment: If C-Trap Adjustment is
incorrect, stripes will appear on the screen.
Test pointAdj. PointModeInput
J271
TapeM. EQ.Spec.
---
CH o / p
buttons
Oscilloscope
Pattern Generator
Figure
---Color Bar
---
FM --- Set to "OFF."
ACCESS CODE --- Set to "OFF."
9V --- Set to "OFF."
RC5 --- Set to "OFF."
Note: C/D data value does not need to be adjusted at
this moment.
3. 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 pointAdj. PointModeInput
R583
TapeM. EQ.Spec.
---Frequency Counter 15.734kHz±300Hz
Note: R583 --- Main CBA
1. Connect Frequency Counter to R583.
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 remote control unit
so that the display will change "0" to "7."
At this moment, choose display "0" to "7" when the
Frequency counter display is closest to
15.734kHz±300Hz.
6. Turn the power off and on again.
CH o / p
buttons
Video---
minimum
Fig. 2
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 unit
so that the carrier leakage B-Out (3.58MHz) value
becomes minimum on the oscilloscope.
5. Turn the power off and on again.
1-6-2T4501EA
Page 23
5. Y DL Time TV/Y DL Time EXT/
Y SW LPF/Black Stretch Off/
Black Stretch CONT/C. Angle
Adjustment
Purpose: To get minimum leakage 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 TV Adjustment: Press "0" button on
the service remote control unit twice to show "D-T
TV" on the display.
Y DL Time EXT Adjustment: Press "0" button on
the service remote control unit three times to show
"D-T EXT" 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.
Black Stretch Off Adjustment: Press "0" button
on the service remote control unit five times to
show "B-S" on the display.
Black Stretch CONT Adjustment: Press "0" button on the service remote control unit six times to
show "BS2" on the display.
C. Angle Adjustment: Press "0" button on the service remote control unit seven times to show "CANG" on the display.
3. Y DL Time TV Adjustment: Select "2" by pressing
"CH o / p" buttons on the service remote control.
Y DL Time EXT Adjustment: Select "2" by pressing "CH o / p" buttons on the service remote control.
Y SW LPF Adjustment: Select "1" by pressing
"CH o / p" buttons on the service remote control.
Black Stretch Off Adjustment: Select "OFF" by
pressing "CH o / p" buttons on the service remote
control.
Black Stretch CONT Adjustment: Select "0" by
pressing "CH o / p" buttons on the service remote
control.
C. Angle Adjustment: Select "103" by pressing
"CH o / p" buttons on the service remote control.
C-TRAP Adjustment (Factory mode)
"0"
button
C-TRP 0C-TRP 1
"0" button
CH
button
CH
button
Y DL Time TV Adjustment
CH
D-T TV 0D-T TV 1
"0" button
button
CH
button
Y DL Time EXT Adjustment
CH
D-T EXT 0D-T EXT 1
"0" button
button
CH
button
Y SW LPF Adjustment
CH
Y SW
"0" button
button
0Y SW
CH
button
Black Stretch Off Adjustment
CH
B-S OFF
"0" button
button
CH
button
Black Stretch CONT Adjustment
CH
BS2 0
button
CH
button
1
B-S 0
BS2 1
"0" button
C. Angle Adjustment
CH
C-ANG 103
button
CH
button
C-ANG 95
1-6-3T4501EA
Page 24
6. V. Size Adjustment
8. H. Shift Adjustment
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 pointAdj. PointModeInput
---
TapeM. EQ.Spec.
---Pattern Generator90±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 unit
so that the monoscope pattern is 90±5% of display
size and the circle is round.
CH o / p
buttons
---Monoscope
7. V. 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 pointAdj. PointModeInput
---
TapeM. EQ.Spec.
---Pattern Generator90±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 remote control unit
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
Purpose: To obtain correct vertical position of screen
image.
Symptom of Misadjustment: If V. position is incorrect, vertical position of image on the screen may not
be properly displayed.
Test pointAdj. PointModeInput
---
TapeM. EQ.Spec.
---Pattern Generator90±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 unit
so that the top and bottom of the monoscope pattern are equal to each other.
CH o / p
buttons
---Monoscope
1-6-4T4501EA
Page 25
9. Cut-off Adjustment
Purpose: To adjust the beam current of R, G, B, and
screen voltage.
Symptom of Misadjustment: White color may be
reddish, greenish or bluish.
Test pointAdj. PointModeInput
Black
---Screen-ControlExt.
TapeM. EQ.Spec.
---Pattern Generator
See Reference
Raster /
White
Raster
Notes below
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.
10. Sub-Brightness Adjustment
Purpose: To get proper brightness.
Symptom of Misadjustment: If Sub-Brightness is
incorrect, proper brightness cannot be obtained by
adjusting the Brightness Control.
Figure
PATTERN GENERATOR
EXT. INPUT
Fig. 3
Notes: Screen Control FBT --- HV/DC Power Supply
CBA
F.B.T= Fly Back Transformer
Use the Remote Control Unit
1. Degauss the CRT and allow CRT to operate for 20
minutes before starting the alignment.
2. Set the 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 appears on the CRT.
4. Press the "VOL p" button.
(Press "VOL p" then display will change CUT OFF/
DRIVE 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 adjustment mode is CUT OFF (G). Press
"CH o / p" until the horizontal line becomes white.
8. Choose CUT OFF/DRIVE mode then press "3" button. This adjustment mode is CUT OFF (B). Press
"CH o / p" until the horizontal line becomes white.
Test pointAdj. PointModeInput
---
TapeM. EQ.Spec.
---
CH o / p
buttons
Pattern
Generator
Figure
---
White
SYMPTE
7.5 IRE
See below
Black
This bar
just
visible
Fig. 4
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 BRT, CNT, COL, TNT, 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.
1-6-5T4501EA
Page 26
11. Focus Adjustment
Purpose: Set the optimum Focus.
Symptom of Misadjustment: If Focus Adjustment is
incorrect, blurred images are shown on the display.
Test pointAdj. PointModeInput
---Focus Control---Monoscope
TapeM. EQ.Spec.
---Pattern GeneratorSee 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 Focus Control on the FBT to obtain clear
picture.
12. Head Switching Position Adjustment
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.
14. 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 pointAdj. PointModeInput
---
TapeM. EQ.Spec.
---Pattern GeneratorSee below.
Deflection Yoke
Purity Magnet
Figure
---*Red Color
Purpose: Determine the Head Switching Point during
Playback.
Symptom of Misadjustment: May cause Head
Switching Noise or Vertical Jitter in the picture.
Note: Unit reads Head Switching Position automatically 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 "CH p" button on the remote control unit if necessary. The value will be changed in
0.5H steps up or down. Adjustable 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.
13. 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.
GREEN
* This becomes RED COLOR if push 7KEY with a
service mode.
1. Set the unit facing east.
2. Operate the unit for over 30 minutes before adjusting.
3. Fully degauss 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 Deflection Yoke Clamper
and pull the Deflection Yoke back away from the
screen. (See Fig. 6.)
6. Loosen the Ring Lock and adjust the Purity Magnets so that a red field is obtained at the center of
the screen. Tighten Ring Lock. (See Fig. 5,6.)
7. Slowly push the Deflection 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.
RED
BLUE
Fig. 5
1-6-6T4501EA
Page 27
15. Convergence Adjustment
Purpose: To obtain proper 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 pointAdj. PointModeInput
C.P. Magnet (RB),
---
C.P. Magnet (RB-G),
Deflection Yoke
TapeM. EQ.Spec.
---Pattern GeneratorSee below.
Figure
---
Dot Pattern
or
Crosshatch
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 center of the screen by rotating (RB) C.P. Magnets. (See Fig. 7.)
3. Align red / blue with green dots at the center 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 slightly 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.
DY WEDGE
CRT
COIL
COIL CLAMPER
DEFLECTION YOKE
PURITY
SCREW
C.P. MAGNET (RB)
R
G
B
C.P. MAGNET (RB-G)
RB
RB
RB-G
RING LOCK
C.P. MAGNET
CLAMPER
C.P. MAGNET
SCREW
Fig. 6
R
G
B
Fig. 7
RB
G
G
Fig. 8
1-6-7T4501EA
Page 28
BLOCK DIAGRAMS
Servo/System Control Block Diagram
TO
CHROMA/TUNER
BLOCK
AL+5V
AFT
SCL
SDA
C-SYNC
8
74
AFT-IN
C-SYNC
EXT-L
KEY
KEY
SW201 SW204,SW206
SWITCH
SWITCH
SW205,SW207 SW210
6
5
KEY 1
KEY 0
TO POWER
SUPPLY BLOCK
P-ON-H
P-DOWN
84
31
P-ON-H
P-DOWN
D204 REC
22
23
REC LED
REC LED
(MEMORY)
SCL
IC202
6
71
SCL
SDA
5
72
SDA
CS
7
45
C-OPEN
2
I
20
EXT-L
SCL
SDA
SP-MUTE
TO
AUDIO BLOCK
A-MUTE
D-REC-H
EXT-H/INSEL
44
65
12
A-MUTE
D-REC-H
SP-MUTE
REC/EE/PB
REC
SW211
33
REC-SAFETY
SAFETY
V-ENV
DV-SYNC
REC/EE/PB
10
13
27
V-ENV
DV-SYNC
REC/EE/PB
ROTA
15
ROTA
TO
RF-SW
18
RF-SW
VIDEO BLOCK
RENTAL
SPL-PLAY
SP/LP/SLP
EXT-H/INSEL
30
32
28
29
RENTAL
SPL-PLAY
SP/LP/SLP
EXT-H/INSEL
IC201
(SERVO/SYSTEM CONTROL)
RS201
AL+5V
D203
MAIN CBA
REMOTE
14
REMOTE
SENSOR
S-LED
CTL AMP-OUT
CTL(+)
95
97
TP201
CTL
WF3
CL402
55CTL(+)
CTL(-)
94
66CTL(-)
LD-SW
SW212
LD-SW
1
ST-SENS.
T-REEL
END-SENS.
9
7
80
T-REELST-SENS.
END-SENS.
Q201
Q202Q206
RESET
34
Q205
RESET
TIMER+5V
SENSOR CBA
(END-SENSOR)
SENSOR CBA
(ST-SENSOR)
C-F/R
C-FG
87
66
P-ON+12V
P-ON+5V
1P-ON+12V
2P-ON+5V(2)
3C-FG
4C-F/R
CL201
M
CAPSTAN
CAPSTAN MOTOR
MOTOR
C-CONT
76
5
6FG-GND
C-CONT
D-PFG
LD-CONT82D-CONT
90
77
7LD-CONT
8
9D-PFG
D-CONT
D/L+12V
10M-GND
11D/L+12V
DEF+B
12D/L+15V
M
)
ASSEMBLY
(DECK
AC HEAD ASSEMBLY
CONTROL
HEAD
1-7-1
PG
M
SENSOR
CYLINDER ASSEMBLY
DRUM
MOTOR
LOADING
MOTOR
T4501BLS
Page 29
Video Block Diagram
X401
3.58MHz
REC VIDEO SIGNAL PB VIDEO SIGNALMODE: SP/REC
MAIN CBA
WF2
P
6162
VXO
Q402
BUFFER
CCD 1H
45474944
DELAY
LUMINANCE
SIGNAL PROCESS
DOC YNR Y/C COMB
CHROMINANCE
SIGNAL PROCESS
AGC
AMP
R
74
DET
ENV
HPF
L
R
91
90
89
88
J274
RF-SW
WF1
TP402
RF-SW
V-ENV
13
WF6
93
V-ENV
WF5
Q401
TP301
BUFFER
V-OUT
35
IC401
VIDEO/AUDIO
SIGNAL PROCESS
6dB
AMP
CHARA
VIDEO
TO CHROMA/
TUNER BLOCK
MIX
FBC
Y/C
V-AGC
MIX
RP
TUNER
42
42
WF4
TU-VIDEO
TO CHROMA/
LINE
38
LINE-VIDEO
TUNER BLOCK
JK701
REAR V-IN
1-7-2
REC/EE/PB
RENTAL
361671
REC/EE/PB
RENTAL
EXT-H/INSEL
SPL-PLAY
TO
SERVO/SYSTEM
SP/LP/SLP
DV-SYNC
ROTA
TRICK
14
395973
DV-SYNC
SP/LP/SLP
ROTA
CONTROL BLOCK
V-COM
V(L)
CL401
321
VIDEO (L) HEAD
CYLINDER ASSEMBLY
(DECK ASSEMBLY)
V(R)
VIDEO (R) HEAD
TO
SERVO/SYSTEM
CONTROL BLOCK
T4501BLV
Page 30
Audio Block Diagram
JK801
EARPHONE JACK
Mode : SP/REC
1
SP801
1
CLN802
CN801
SPEAKER
TO
SERVO/
SPEAKER
SP-GND2
SYSTEM
CONTROL
BLOCK
TO
SERVO/
SYSTEM
CONTROL
BLOCK
REC
98
67
AMP
WF9
D-REC-H
11 12 71 16
A-MUTE
REC/EE/PB
EXT-H/INSEL
D-REC-H
96
MUTE
LINE
AMP
ALC
TUNER
LINE
8076
P
R
100
2
1
MAIN CBA
PB-AUDIO SIGNALREC-AUDIO SIGNAL
IC301(VIDEO/AUDIO SIGNAL PROCESS)
IC801 (AMP)
AMP
MUTE
OUTPUT
7
241415
5
TUNER
32
AUDI O
ATT
LINEVCR
I/F
SERIAL
SP-MUTE
WF8
26
TP401
21
A-OUT
(AUDIO PROCESS)
IC401
EQ
4
CL402
SP/LP-ON
AMP
A-COM
A-PB/REC
431
4
3A-COM
3
AE-H
AE-H/FE-H
2
1
2
Q872
BIAS
OSC
AUTO
Q871
99
BIAS
Q873
CL403
FE-H
2
P-ON+5V
Q875
FE-H-GND
1
P-ON+5V
Q874
TU-AUDIO
TO
CHROMA/TUNER
BLOCK
SCL
SDA
TO
SERVO/SYSTEM
JK702
CONTROL BLOCK
A-IN
CN287
A-PB/REC
AE-H
AE-H/FE-H
AC HEAD ASSEMBLY
AUDIO
HEAD
AUDIO
ERASE
HEAD
BLOCK DIAGRAM FOR SECTION 2 (DECK MECHANISM)
1-7-3
FE HEAD UNIT
FULL
ERASE
HEAD
T4501BLA
Page 31
Chroma/Tuner Block Diagram
MAIN CBA
REC VIDEO SIGNALPB VIDEO SIGNALMode : SP/REC
REC-AUDIO SIGNAL
TU VIDEO TO VIDEO BLOCK
1
EQ
AMP
3
WF7
TO AUDIO BLOCKTOSERVO/ SYSTEM
TU AUDIO
11
AF
FM
8
AMP
DET
CONTROL BLOCK
EXT-L
7
VCO F/B
TO
VIDEO
25
23
TUNER
VCR
VIDEO BLOCK
LINE-VIDEO
20
LINE
VCR
TUNER
LINE
X301
CHROMA
3.58MHz
BPF
18
VXCO
FILTER
TUNING
CHROMA
SIGNAL
PROCESS
CIRCUIT
TO
RED
2
CL502B
2
CRT/H.V. BLOCK
CL502A
GREEN3
BLUE
4
453
AFC
TP302
WF11
AFC
40
TO
CRT/H.V. BLOCK
H-DRIVE
ACL
41
V-RAMP-NF
V-DRIVE
CF031
IC100 (IF SIGNAL PROCESS)
SF001
TU001
4.5MHz
TRAP
5
VIDEO
DET
VIF
AMP
20
21
SAW
FILTER
11
IF
CF032
4.5MHz
FILTER
VCO
AFT
16
AMP
14
LPF
RF
AGC
17
1
AGC
IF AGC DET
4
5
SCL
SDA
IC301 (VIDEO/AUDIO/CHROMA/DEFLECTION)
8
FSC
OSD MIX/RBG MATRIX/
BLIGHT/DRIVE AMP/
CHROMA
TRAP
LUMA
SIGNAL
PROCESS
CIRCUIT
H-SYNC
PROCESS
CIRCUIT
V-SYNC
PROCESS
IC201
(SYSTEM CONTROL/OSD)
CIRCUIT
16
56
CV-IN
INTELLIGENT
MONITORING
SYNC
SCL
SEPARATION
SDA
AFT
C-SYNC
SERIAL
I/F
31
6
15
14
HV BLANKING
101112
626364
OSD-B
OSD-R
OSD-G
13
OSDT-BLK
9
595860
V-SYNC
WF18
8
H-SYNC
WF17
35
WF10
34
1-7-4
TO
SERVO/SYSTEM
CONTROL BLOCK
T4501BLC
Page 32
CRT/H.V. Block Diagram
V-
DRIVEH-DRIVE
DEFLECTION-YOKE
543
WF13
Mode : SP/REC
1
CN571
ANODE
JK501
FOCUS
SCREEN
GND
V501
RGB
CRT
HEATER
GND
CN505
WF16
REC VIDEO SIGNALPB VIDEO SIGNAL
IC551 (V-DEFLECTION CONTROL)
THERMAL
PROTECTION
7
5
AMP
WF15WF14
Q511
GREEN AMP
Q521
RED AMP
BLUE AMP
Q531
CRT CBA
CL501ACL501B
VCC
UP
T572
Q571
H.OUTPUT
32
6
PUMP
1
ANODE
FOCUS VR
HV
T571 F.B.T.
F
FOCUS
SCREEN
33HEATER
11P-ON+160V
SCREEN VR
S
11
7
8
10
1
5
6
9
3
4
MAIN CBA
Q572
H.DRIVE
WF12
2RED
3GREEN
4BLUE
CL502A
DEF+B
+B
TO
POWER SUPPLY
BLOCK
1-7-5
V-DRIVE
H-DRIVE
TO
AFC
ACL
V-RAMP-NF
CHROMA/TUNER
BLOCK
TO
CHROMA/TUNER
BLOCK CL502B
T4501BLCRT
Page 33
Power Supply Block Diagram
TO
DC POWER
SUPPLY BLOCK
CN1951
+B
DEF+B
AL+33V
P-ON+5V
P-ON+5V
1 P-ON-H
3 P-ON+12V
5 AL+12V
7 P-ON+9V
8 DC+13V
10 DEF+B
13 +B
14 +B
CN602
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
AL+12V
P-ON+5V
P-ON+8V
Q609
P-ON+12V
AL+5V
+5V REG.
TIMER+5V
Q958
Q612
P-DOWN
(TO PIN84 OF IC201)
Q606
Q607
P-ON-H
(TO PIN31 OF IC201)
IC301
3027
+5.7V
REGULATOR
P-ON-ON
MAIN CBA
+5V REG.
+5V REG.
+5V REG.
IC602
Q608
Q611
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE 4 A, 125V FUSE.
CAUTION:
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE 4A, 125V.
4A 125V
T601
12
6
11
10
4
9
HOTCOLD
BRIDGE
RECTIFIER
D603 - D606
FILTER
PS601
L601
LINE
+8V REG.
Q610
Q601
Q605
+B ADJ.
VR601
FEED
BACK
7
8
41
2
1
IC601
ERROR
VOLTAGE DET
LIMITER
Q602
Q604
32
4A 125V
F601
HOT CIRCUIT. BE CAREFUL.
CAUTION !
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
4A/125V
W601
CL601
DG1601
DEGAUSSING
COIL
SWITCHING
1-7-6
T4501BLP
Page 34
DC Power Supply Block Diagram
TO POWER
13578
SUPPLY BLOCKCN602
101314
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE 8 A, 125V FUSE.
+B
ADJ.
VR1951
CAUTION:
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE 8A, 125V.
8A 125V
10
11
12
T1951
2
1
5
3
4
68
WH1951B
13578
1 P-ON-H
3 P-ON+12V
WH1951ACN1951
5 AL+12V
7 P-ON+9V
Q1953
101314
8 DC+13V
10 DEF+B
JUNCTION CBA
13 +B
14 +B
SW/CTL
Q1954,
Q1955
Q1952
Q1956
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F1951) is blown, check to see that all components in the power supply
circuit are not defective before you connect the DC plug to the DC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
JK1951
DC JACK
F1951
DC IN
8A 125V
8A/125V
Q1931
Q1933
1
OSC
IC1951 (PWM CONTROL)
1-7-7
Q1930
2
DRIVE
Q1932
SHORT
PROTECTION
6 5
7
DC POWER SUPPLY CBA
Q1951
T4501BLD
Page 35
MECHANICAL TROUBLE INDICATOR
1, Each Malfunction Indication
If the MONITOR is turned ON right after the Mechanical Malfunction occurs or POWER SAFETY is turned
ON, display the following character to show Malfunc-
If P-SAFETY 1 port becomes continuously 2.5V or
more for 120 msec. (4 times 40 msec. interval), the
unit shall immediately turn OFF the POWER/MONITOR and switch over to the Mechanical Malfunction
mode with POWER OFF.
(To return from this mode shall become possible only
by POWER Key as in the case of the Mechanical Malfunction).
POWER SAFETY
1) POWER SAFETY 2
If P-SAFETY 2 port becomes continuously 2.5V or
less for 120 msec. (4 times 40 msec. interval) when
P-ON-H port is ON, the unit shall be assumed to be
the Power Malfunction 2 and immediately turn OFF
the POWER/MONITOR and switch over the
Mechanical Malfunction mode with POWER OFF.
(Shall not unload)
(To return from this mode shall become possible
only by POWER Key as in the case of the Mechanical Malfunction).
* However the POWER SAFETY 2 function shall be
disabled during 500 msec. right after the P-ON-H
turns ON.
2) POWER SAFETY 3
If P-SAFETY 3 port becomes continuously 2.5V or
over for 120 msec. (4 times 40 msec. interval)
when MONITOR is ON, P-SAFETY 3 function is
available. After that, if P-SAFETY 3 port becomes
continuously 2.5V or less for 120 msec. (4 times 40
msec. interval), the unit shall be assumed to be the
Power Malfunction 3 and immediately turn OFF the
POWER/MONITOR and switch over the Mechanical Malfunction mode with POWER OFF.
(Shall not unload)
(To return from this mode shall become possible
only by POWER Key as in the case of the Mechanical Malfunction).
1-7-8T4501MTI
Page 36
Mechanical Malfunction determination
1) REEL Malfunction detection
Countermeasure for REEL and CAPSTAN motor
After the Malfunction detection with REEL/CAPSTAN sensor, the unit shall switch over to STOP
(B) and be REEL Mechanical Malfunction.
a) If the T-REEL pulse is not impressed after a lapse
of 5 sec. at SP, 10 sec. at LP, 14 sec. at SLP, or
more in the REEL Rotation Mode like PLAY/REC,
FS/RS Mode, and the T-REEL or S-REEL pulse is
not impress after a lapse of 4 sec. or more in REEL
Rotation Mode of FF/REW, it shall be assumed to
stop the rotation and switch over to STOP (B) position, then POWER be turned OFF and the unit be
REEL Mechanical Malfunction. (T-REEL and SREEL for the models on S-REEL and only T-REEL
for other models)
b) If the C-FG pulse is not impressed for a lapse of 1
sec. or more during the CAPSTAN MOTOR rotation, it shall be MOTOR Rotation Malfunction
(REEL Malfunction).
2) DRUM Malfunction detection
Detect the DRUM rotation at the D-FG input termi-
nal.
If the variation of D-FG input level is not detected
for a lapse of 1 sec. or more when D-CONT is "H",
it shall be assumed to be Rotation Malfunction and
be DRUM Malfunction.
When detect Drum Malfunction, POWER shall be
turned OFF after the unit switches over to STOP
(B) Mode.
3) Countermeasure for TAPE LOADING Malfunction
Detect the Malfunction with the LOADING Switch.
a) TAPE LOADING Malfunction
If LD-SW does not go to the established position
after a lapse of 7 sec. or more from TAPE LOADING or TAPE UNLOADING start, the LOADING
function shall immediately be stopped and POWER
be turned OFF, and inform the Timer about the
LOADING Mechanical Malfunction.
b) LD-SW Position Malfunction at each mode
When the unit operates at each mode, even if the
LD-SW position changes from the established one
in its mode, it keeps the function according to its
mode.
4) Countermeasure for CASSETTE LOADING Malfunction
a) CASSETTE IN operating Malfunction
If LD-SW does not go to SB position after a lapse
of 5 sec. or more from the CASSETTE insertion
start, the unit starts the CASSETTE OUT operation.
After switch over to CASSETTE OUT operation and
then a laps of 5 sec. or more from the CASSETTE
OUT operation start, if LD-SW does not go to the
EJ position or if START Sensor and END Sensor
does not turn "ON" at the EJ position, the unit
starts again to insert CASSETTE.
(However in S-INH state, the START/END Sensor
shall be disabled).
b) CASSETTE OUT operating Malfunction
After a lapse of 5 sec. or more from CASSETTE
OUT operation start, if LD-SW does not go to the
EJ position or if START Sensor and END Sensor
does not turn "ON" at the EJ position, the unit
starts to insert CASSETTE.
(However in S-INH state, the START/END Sensor
shall be disabled).
When the unit switches over to CASSETTE insertion at CASSETTE IN or CASSETTE OUT Malfunction, if LD-SW does not go to the SB position
after a lapse of 5 sec. or more from CASSETTE
insertion start, the function shall immediately be
stopped and POWER be turned OFF, and the unit
be CASSETTE LOADING Malfunction.
c) When POWER is turned ON, if the CL position or
GC position cannot be detected after 5 sec. LDREV operation and 5 sec. LD-FWD operation, the
function shall immediately be stopped and POWER
be turned OFF, and the unit be CASSETTE LOADING Malfunction.
d) When POWER is turned ON without CASSETTE
(EJ position) and LD-SW is monitored all the time,
if the CL or GC position is detected continuously for
1 sec. or more, the POWER shall be turned OFF
and the unit be CASSETTE LOADING Malfunction.
Countermeasure for Mechanical
Malfunction
If the unit detects Mechanical Malfunction, turn the
POWER OFF. If the unit is Mechanical Malfunction,
Key input except POWER key shall be disabled and
CASSETTE insertion disabled. When POWER Key is
entered, the POWER is turned ON and the unit
switches over the EJECT Mode. (Return with POWER
ON)
1-7-9T4501MTI
Page 37
Power Supply Trouble Shooting Guide
It is highly recommended that a variable isolation
transformer which can monitor current be used.
(Alternatively a variable AC source which monitors
current will do). Read directions below before
power is added
#
CHECK
Repair method
Check Fuse (F601) is blown
out or not.
If fuse is blown out,
YES
#1
do repair method #1
NO
Check whether the primary
rectifying DC of the Switching
power supply has an output.
NO
#2
(Reading should be about 168V.
YES
Voltage of the 105V line
higher than normal?
YES
#3
NO
The transformer of the power
supply makes a higher sound
or the oscillation wave form is
abnormal.
(E.g. intermittent oscillation)
Connect the positive probe of
oscilloscope to the pin 16 of
YES
#4
T601, then connect the negative
probe to the pin 12. Observe the
waveform and check to see if
the waveform is out of limit of
value shown in Fig.1.
Voltage approx. 5Vp-p
0V
T=Approx. 6 to 14 sec
Oscilloscope setting: 1V/DIV.
2 sec./DIV
Fig.1
Repair method #1
(Power must be off)
Short circuit in the secondary side. check diode D613,
D614, D616, D617 and D618, switching transistor
(Q601), control transistor (Q602), diode and resistor
replace as necessary.
Disconnect 105V diode (D613), 25V diode (D614), 8V
diode (D616), 12V diode (D617), 12V diode (D618)
and Check the load continuity of 105V line, 25V line,
8V line, 12V line through a tester (resistance range).
If the tester indicates a lower resistance value around
0 ohm, the line is short-circuited.
Before repairing the switching power supply, find out
the short-circuited area of such line and repair it.
If the tester does not indicate any low resistance value
(around 0 ohm), no load is short-circuited and there is
no problem.
Check for any defective parts while the secondary rectifying diodes are disconnected (D613, D614, D616,
D617 and D618) perform a diode check in both forward and reverse directions through a tester.
NO
There is no problem on the
SW power supply
1-7-10T4501TR1
Page 38
Repair method #2
Check the primary rectifying diodes (D603-D606) as
possible problems. Remove the above mentioned
parts and check them. Perform check according to the
step 1 and 2 of repair method #1 and check for defects
following parts, then if necessary replace with factory
originals.
R602 is open or not.
Q601, Q602, D607, D608 and D611 are short or not.
Repair method #3
The feedback circuit which is monitored by the output
of D613 105V may not work and this may be regarded
as a possible cause, remove IC601 (Photo Coupler),
diode (D620) and transistor (Q604) check for defects.
Repair method #4
Check control circuitly which is connecting to Pin 2
and 1 of Switching Transformer T601.
1-7-11T4501TR1
Page 39
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS
Standard Notes
Warning
Many electrical and mechanical parts in this chassis
have special characteristics. These characteristics
often pass unnoticed and the protection afforded by
them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage,
etc. Replacement parts that have these special safety
characteristics are identified in this manual and its
supplements; electrical components having such features are identified by the mark " # " in the schematic
diagram and the parts list. Before replacing any of
these components, read the parts list in this manual
carefully. The use of substitute replacement parts that
do not have the same safety characteristics as specified in the parts list may create shock, fire, or other
hazards.
Capacitor Temperature Markings
Mark
(B)
(F)+30 -80%20°C-25~+85°C
Capacity
change rate
±10%
Standard
temperature
20°C-25~+85°C
Temperature
range
Note:
1. Do not use the part number shown on these drawings for ordering. The correct part number is shown
in the parts list, and may be slightly different or
amended since these drawings were prepared.
2. All resistance values are indicated in ohms (K=10
6
).
M=10
3. Resistor wattages are 1/4W or 1/6W unless otherwise specified.
4. All capacitance values are indicated in µF
-6
(P=10
5. All voltages are DC voltages unless otherwise
specified.
µF).
3
,
(SR)
(Z)+30 -80%20°C-10~+70°C
Capacitors and transistors are represented by the following symbols.
±15%
20°C-25~+85°C
CBA Symbols
(Top View) (Bottom View)
+
Electrolytic Capacitor
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)
NPN Transistor
E C B
(Top View)
E C B
PNP Transistor
Schematic Diagram Symbols
Digital Transistor
(Top View)
E C B
NPN Digital Transistor
(Top View)
PNP Digital
Transistor
E C B
1-8-1SC_1
Page 40
LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON
THE FOLLOWING PAGES:
1. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME
TYPE_A,_V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V.
2. CAUTION:
Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not defective
before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the
power supply circuit to fail.
3. Note:
(1) Do not use the part number shown on the drawings for ordering. The correct part number is shown in the parts
list, and may be slightly different or amended since the drawings were prepared.
(2) To maintain original function and reliability of repaired units, use only original replacement parts which are listed
with their part numbers in the parts list section of the service manual.
4. Wire Connectors
(1) Prefix symbol "CN" means "connector" (can disconnect and reconnect).
(2) Prefix symbol "CL" means "wire-solder holes of the PCB" (wire is soldered directly).
5. Note: Mark "•" is a leadless (chip) component.
6. Mode: SP/REC
7. Voltage indications for PLAY and REC modes on the schematics are as shown below:
PLAY mode
REC mode
3
2
1
ABCD
AREA D3
1-D3
The same voltage for
both PLAY & REC modes
8. How to read converged lines
1-D3
Distinction Area
Line Number
(1 to 3 digits)
Examples:
1. "1-D3" means that line number "1" goes to area "D3".
2. "1-B1" means that line number "1" goes to area "B1".
5.0
231
5.0
(2.5)
Indicates that the voltage
is not consistent here.
Unit: Volts
1-B1
AREA B1
9. Test Point Information
: Indicates a test point with a jumper wire across a hole in the PCB.
: Used to indicate a test point with a component lead on foil side.
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
4A/125V
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 4A, 125V.
S3
S2
T3
T2
U3
U2
V3
V2
W3
W2
X3
X2
S1
1-8-9
T1
U1
V1
1-8-10
W1
X1
T4501SCM4
Page 45
Main 5/5 & CRT Schematic Diagram
MAIN 5/5
Ref No.Position
IC551
Y-3
Q571
AA-2
Q572
Z-3
Q591
Z-2
CL501BBB-3
CL502B
BB-2
CN571Z-3
IC
TRANSISTORS
CONNECTORS
CRT
Ref No.Position
TRANSISTORS
Q511
Q521
Q531
CONNECTORS
CL501A
CL502A
CN505DD-2
CC-2
CC-2
CC-2
BB-3
BB-2
Y3
Y2
Z3
Z2
REC Video Signal
AA3
AA2
PB Video Signal
BB3
BB2
CC3
CC2
DD3
DD2
Y1
Z1
1-8-111-8-12
AA1
BB1
CC1
DD1
T4501SCM5
Page 46
DC Power Supply Schematic Diagram
DC POWER SUPPLY
Ref No.Position
IC1951
A-2
Q1930
B-2
Q1931B-2
Q1932
B-2
Q1933
B-2
Q1951
B-1
Q1952
C-1
Q1953
C-2
Q1954
C-2
Q1955
D-1
Q1956
D-1
WH1951A
D-2
VR1951C-1
VARIABLE RESI STOR
IC
TRANSISTORS
CONNECTOR
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F1951) is blown, check to see that all components in the power supply circuit
are not defective before you connect the DC plug to the DC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
8A 125V
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 8A, 125V.
A3
A2
B3
B2
C3
C2
D3
D2
E3
E2
A1
B1
1-8-131-8-14
C1
D1
E1
T4501SCDC
Page 47
Main CBA Top View
MAIN CBA
Ref No.Position
IC100
D-4
IC201
A-3
IC202
B-3
IC301
B-4
IC401
C-3
IC551
D-2
IC601E-3
IC602
D-2
IC801
A-1
Q205
A-4
Q206
B-3
Q301
B-4
Q401
B-3
Q402
B-3
Q571D-1
Q572
C-1
Q591
C-1
Q601
E-3
Q602
E-3
Q604
E-3
Q605
E-2
Q606
D-2
Q607
D-2
Q608
D-3
Q609
D-3
Q610
C-4
Q611
D-3
Q612
D-3
Q871
C-3
Q872
D-3
Q873
C-2
Q874
C-3
Q875C-2
Q958
D-3
CL201
C-1
CL501B
D-1
CL502B
C-4
CL601D-4
CN571
D-1
CN602
E-2
CN801
B-4
J271C-4
J274C-4
TP201
B-4
TP301
C-4
TP302
B-4
TP401
C-4
TP402
C-4
VR601E-3
ICS
VARIABLE RESI STOR
CONNECTORS
TEST POINTS
TRANSISTORS
CAUTION !
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply circuit
are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
1-8-15
WF3
TP201
CTL
WF1
J274
RF-SW
TO SENSOR CBA
(END-SENSOR)
WF8
J271
B-OUT
TP401
A-OUT
D254
TO SENSOR CBA
(START-SENSOR)
WF6
TP402
V-ENV
WF5
TP301
V-OUT
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH AME TYPE 4A, 125V FUSE.
4A 125V
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 4A, 125V.
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
SLOWLY, WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
C613 GND
(+B Adjustment)
VR601
+B ADJ
D613 Cathode
(+B Adjustment)
D553
R583
(H Adjustment)
1-8-16
Sensor CBA Top View
BHB300F01014-A
BHB300F01014-B
BT4400F01012-A
Page 48
Main CBA Bottom View
CAUTION !
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
WF7
PIN 8
OF IC100
4A 125V
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 4A, 125V.
WF9
PIN 7
OF IC401
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
SLOWLY, WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
WF11
PIN 41
OF IC301
WF13
PIN 5
OF CN571
WF10
PIN 9
OF IC301
WF2
PIN 61
OF IC401
WF18
PIN 59
OF IC201
WF17
PIN 58
OF IC201
WF4
PIN 42
OF IC401
WF12
Q571
Collector
1-8-17
1-8-18
BT4400F01012-A
Page 49
DC Power Supply CBA Top View
DC POWER SUPPLY CBA
Ref No.Position
IC1951
A-1
Q1930
A-1
Q1931
A-1
Q1932
A-1
Q1933
A-1
Q1951
A-1
Q1952
B-2
Q1953
B-2
Q1954
B-2
Q1955
B-2
Q1956
B-2
WH1951A
C-2
VR1951B-1
VARIABLE RESI STOR
IC
TRANSISTORS
CONNECTOR
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F1951) is blown, check to see that all components in the power supply circuit
are not defective before you connect the DC plug to the DC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
8A 125V
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 8A, 125V.
VR1951
+B ADJ
1-8-20
BT4400F01022-A1-8-19
Page 50
DC Power Supply CBA Bottom View
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F1951) is blown, check to see that all components in the power supply circuit
are not defective before you connect the DC plug to the DC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
8A 125V
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 8A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 8A, 125V.
1-8-21
1-8-22
BT4400F01022-A
Page 51
CRT CBA Top View
CRT CBA
Ref No.Position
TRANSISTORS
Q511
Q521
Q531
CONNECTORS
CL501A
CL502A
CN505A-1
CRT CBA Bottom View
B-2
B-2
B-2
A-1
B-2
WF15
Q521
Collector
WF14
Q511
Collector
WF16
Q531
Collector
1-8-231-8-24
BT4400F01012-B
Page 52
Junction CBA Top View
Junction CBA Bottom View
1-8-25
BT4400F01022-B
1-8-26
Page 53
sec
µ
1DIV: 1V 20
IC201 PIN 58
WAVEFORMS
1DIV: 1V 5msec
IC201 PIN 59
WF17
WAVEFORM NOTES
INPUT: NTSC COLOR BAR SIGNAL (WITH 1kHz AUDIO SIGNAL)
BRIGHTNESS, COLOR AND TINT CONTROLS: CENTER POSITION
10INV-ENVVideo Envelope Input
11 OUT FM-SWSwitching IF IC VCO
12 OUT SP-MUTESpeaker Mute Output
13 OUT D-V SYNCArtificial V-Sync Output
14INREMOTERemote Signal Input
15 OUT ROTA
16-NUNot Used
17-NUNot Used
18 OUT RF-SW
19-NUNot Used
20 OUT EXT-L
21-NUNot Used
22 OUT REC-LED
23 OUT REC-LED
24-NUNot Used
25-NUNot Used
26-NUNot Used
27 OUT REC/EE/PB YCA IC Mode Output
IN/
28
OUT
29 OUT
Signal
Name
Power Supply Failure
Detection 2
Power Supply Failure
Detection 3
Color Phase Rotary
Changeover SIgnal
Video Head Switching
Pulse
External Input or
Playback = Output
Recording LED Control
Signal
Recording LED Control
Signal
SP/LP/SLPTape Speed Control Output
EXT-H/
INSEL
External Input or Playback
Signal Input Selector
Control Signal
Function
Pin
IN/
No.
OUT
30 OUT RENTAL
31 OUT P-ON-HPower On Signal at High
32 OUT SPL-PLAY
33IN
34INRESET
35INXC-INSub Clock 32 kHz
36 OUT XC-OUTSub Clock 32 kHz
37-TIMER+5VVcc
38INX-INMain Clock Input
39 OUT X-OUTMain Clock Output
40-GNDGND
41 OUT SPOT-KILLCounter-measure for Spot
42-NUNot Used
43INCLKSELClock Select (GND)
44 OUT D-REC-HDelayed Record Signal
45INI2C-OPEN
46-GNDGND
47-NUNot Used
48-NUNot Used
49-GNDOSD GND
50-NUNot Used
51-NUNot Used
52-NUNot Used
53-P-ON+5VOSD Vcc
54-HLFHLF
55INV-HOLDVHOLD
56INCV-INVideo Signal Input
57-GNDGND
58INH-SYNCH-SYNC Input
59INV-SYNCV-SYNC Input
60 OUT OSD-BLKOutput for Picture Cut off
61-NUNot Used
62 OUT OSD-BBlue Output
63 OUT OSD-GGreen Output
Signal
Name
RECSAFETY
Function
Rental Position Control
Signal
Special Playback Control
Signal
Record Protection Tab
Detection
System Reset Signal
(Reset=”L”)
White Balance Adjust
Mode Judgment
1-12-1T4501PIN
Page 58
Pin
No.
IN/
OUT
Signal
Name
Function
Pin
No.
IN/
OUT
Signal
Name
Function
64 OUT OSD-RRed Output
65 OUT A-MUTEAudio Mute Output
66 OUT C-F/R
67-NUNot Used
68-NUNot Used
69-NUNot Used
70-NUNot Used
71 OUT SCL
IN/
72
73-NUNot Used
74INC-SYNCC-Sync Input
75-NUNot Used
76 OUT C-CONT
77 OUT D-CONTDrum Motor Control Signal
78-NUNot Used
OUT
SDA
Capstan Motor FWD/REV
Control Signal
E2PROM/CHROMA IC
Tuner Communication
Clock
E2PROM/CHROMA IC
Tuner Communication Data
Capstan Motor Control
Signal
IN/
95
96-AMPCAMPC
97 OUT
98-P-ON+5VPower Supply for AMP
99-AL+5VA/D, D/A Standard Voltage
100INP-SAFETY 1
CTL (+)CTL (+)
OUT
CTL AMP
OUT
Control Amp Output
Power Supply Failure
Detection 1
79-NUNot Used
80INT-REEL
81-NUNot Used
82 OUT LD-CONT
83-NUNot Used
84INP-DOWN
85-NUNot Used
See Electrical Parts List
for parts with this mark.
1-14-11-14-2T4501CEX
A1X
TL14
TB21
TL18
TB20
SENSOR CBA
TB1
TL1
L2
PB3
TL4
PB1
PL1
DC POWER SUPPLY CBA
TL4
Page 61
Packing
X7
X22
TAPE
TAPE
X1
X2
X16
X6
X3
S2
S2
X4
S12
S6
S3
S3
FRONT
S4
S1
1-14-3T4501PEX
Page 62
MECHANICAL PARTS LIST
PRODUCT SAFETY NOTE: Products marked with a #
have special characteristics important to safety. Before
replacing any of these components, read carefully the
product safety notice in this service manual. Don't
degrade the safety of the product through improper servicing.
NOTE:
Parts that are not assigned part numbers (---------) are
not available.
Comparison Chart of Models and Marks
ModelMark
SC309EA
6309CEB
Ref. No. MarkDescriptionPart No.
A1XAFRONT CABINET ASSEMBLY T4501UB 0EM201841
A1XBFRONT CABINET ASSEMBLY T4502UC 0EM201842
A1-1FRONT CABINET T4400UA0EM000698
A1-2CONTROL PLATE T4501UB0EM302056
A1-3ABRAND PLATE T4501UB:SYMPHONIC0EM409146
A1-3BBRAND PLATE T4302UC:SYLVANIA0EM407030
A1-4ACASSETTE DOOR T4501UB0EM409147
A1-4BCASSETTE DOOR T4302UC0EM407059
A1-5SPRING DOOR(Z10) T5200UA0EM406687
A2REAR CABINET T4400UA0EM000703
A3#ARATING LABEL T4501UB----------
A3#BRATING LABEL T4502UC----------
A4APOP LABEL T4501UB----------
A4BPOP LABEL T4502UC----------
1B1DECK ASSEMBLY CZD013/VM2226N2226FT
B1SPRING TENSION B0080B0:EM4080826WH006
B2M5 CRT SCREW(B) B4000UA0VM403923
B3SHIELD PLATE(Z9 9V) T4100UA0EM405692A
B5CLOTH 190X15XT0.5TS7623
B8CLOTH B0071V9:TS734624WE420
B10CLOTH(10X30XT0.5) B5900UA0EM404486
B11CLOTH(10X30XT0.5) B5900UA0EM404486
B13CLOTH(15X10XT0.5) L9700UA0EM405038
CLN801WIRE ASSEMBLY 2P/170WX1B4800-002
DG1601#DEGAUSSING COIL F-049LLBH00ZTM049
L1SCREW, P-TIGHT 4X18 BIND HEAD +GBMP4180
L2SCREW TAPPING M4X14DBU14140
L7SCREW, P-TIGHT 3X10 BIND HEAD+GBKP3100
L8SCREW, P-TIGHT 3X10 BIND HEAD+GBKP3100
SP801SPEAKER S08F02BDSD0808XQ010
TB1TRAY CHASSIS T4400UA0EM000693
TB29V TOP SHIELD T4400UA0EM101252
TB10RCA HOLDER(F) T4400UA0EM407722
TB22#9V CHASSIS NO. LABEL TJ T4501UB1EM420008
TB24WIRE HOLDER T4400UA0EM407724
TL1SCREW, P-TIGHT 3X12 WASHER
TL3SCREW, S-TIGHT 3X4 BIND HEAD+GBMS3040
TL4SCREW, P-TIGHT 3X12 WASHER
HEAD+
HEAD+
GCMP3120
GCMP3120
Ref. No. MarkDescriptionPart No.
TL14SCREW, B-TIGHT M3X8 BIND HEAD+GBMB3080
TL18SCREW, P-TIGHT M3X8 BIND HEAD+GBCP3080
V501#CRT A23KQU22X01TCRT190SM012
PACKING
S1ACARTON T4501UB0EM409102
S1BCARTON T4502UC0EM409103
S2STYROFOAM TOP T4400UA0EM000720
S3STYROFOAM BOTTOM ASSEMBLY
S4ASERIAL NO. LABEL T4501UB----------
S4BSERIAL NO. LABEL T4502UC----------
S6SET SHEET:1000X600XT0.3 L7300UA0EM401153
S12AC CORD SHEET T4400UA0EM407920
T4400UA
0EM407734
ACCESSORIES
X1BAG POLYETHYLENE 235X365XT0.030EM408420
X2#AOWNER'S MANUAL T4501UB0EMN02466
X2#BOWNER'S MANUAL T4502UC0EMN02467
X3REMOTE CONTROL 512/ERC001/
X4DRY BATTERY R6P UM3 orXB0M451GH001
X6DIPOLE ANTENNA B5307UH or0EMN00723
X7ASHEET RETURN STOP L6100UA0EM407076
X7BSHEET RETURN STOP L6101UB0EM407077
X16MATCHING ADAPTOR ICM-02N orUCPGANTPK004
X22CAR PLUG CORDWPZ0202GA004
N0150UD or
REMOTE CONTROL 512/ERC001/
N0107UD
DRY BATTERY R6P(AR)2PX orXB0M451HU002
DRY BATTERY R6P(AR)2P X ICI orXB0M451HU003
DRY BATTERY(SUNRISE) R6SSE/2S or XB0M451MS002
DRY BATTERY R6P/2SXB0M451T0001
DIPOLE ANTENNA B5700UA0EMN01183
MATCHING ADAPTOR or1813641
MATCHING ADAPTOR1780258
N0150UD
N0107UD
200402241-15-1T4501CA
Page 63
ELECTRICAL PARTS LIST
PRODUCT SAFETY NOTE: Products marked with a
# have special characteristics important to safety.
Before replacing any of these components, read carefully the product safety notice in this service manual.
Don't degrade the safety of the product through
improper servicing.
NOTES:
1.Parts that are not assigned part numbers (---------)
are not available.
2.Tolerance of Capacitors and Resistors are noted
with the following symbols.
C.....±0.25%D.....±0.5%F.....±1%
G.....±2%J......±5%K.....±10%
M.....±20%N.....±30%Z.....+80/-20%
MMA CBA
Ref. No.DescriptionPart No.
MMA CBA 0ESA06147
Consists of the following
MAIN CBA
CRT CBA
SENSOR CBA
MAIN CBA
Ref. No.DescriptionPart No.
MAIN CBA
C005ELECTROLYTIC CAP. 220µF/16V M orCE1CMASDL221
C007CHIP CERAMIC CAP. B K 0.01µF/50VCHD1JKB0B103
C008ELECTROLYTIC CAP. 10µF/50V M orCE1JMASDL100
C032CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C033CERAMIC CAP.(AX) F Z 0.01µF/25VCCA1EZTFZ103
C035CERAMIC CAP.(AX) CH J 15pF/50VCCA1JJTCH150
C036CHIP CERAMIC CAP. B K 220pF/50VCHD1JKB0B221
C037CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C039ELECTROLYTIC CAP. 1µF/50V M H7CE1JMAVSL1R0
C040CHIP CERAMIC CAP. B K 0.01µF/50VCHD1JKB0B103
C042CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C043CHIP CERAMIC CAP. F Z 0.022µF/50VCHD1JZB0F223
C044CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C046CERAMIC CAP.(AX) F Z 0.01µF/25VCCA1EZTFZ103
C047CHIP CERAMIC CAP. B K 0.01µF/50VCHD1JKB0B103
C048ELECTROLYTIC CAP. 47µF/50V M orCE1JMASDL470
C049CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C052CHIP CERAMIC CAP. B K 0.047µF/50VCHD1JKB0B473
C053CHIP CERAMIC CAP. B K 0.047µF/50VCHD1JKB0B473
C054CERAMIC CAP.(AX) Y M 0.01µF/16VCCA1CMT0Y103
C203CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C207ELECTROLYTIC CAP. 47µF/6.3V M H7CE0KMAVSL470
Consists of the following
CAPACITORS
ELECTROLYTIC CAP. 220µF/16V MCE1CMASTL221
ELECTROLYTIC CAP. 10µF/50V MCE1JMASTL100
ELECTROLYTIC CAP. 47µF/50V MCE1JMASTL470
------------
-----------0ESA06171
------------
Ref. No.DescriptionPart No.
C208ELECTROLYTIC CAP. 47µF/6.3V M H7CE0KMAVSL470
C210CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C211CERAMIC CAP.(AX) F Z 0.01µF/25VCCA1EZTFZ103
C212CHIP CERAMIC CAP. SL J 22PF/50VCHD1JJBSL220
C213CHIP CERAMIC CAP. SL J 22PF/50VCHD1JJBSL220
C214ELECTROLYTIC CAP.(SS.T) 220µF/10V M H7CA1A221S6028
C216CERAMIC CAP.(AX) Y M 0.01µF/16VCCA1CMT0Y103
C217CHIP CERAMIC CAP. SL D 10PF/50VCHD1JDBSL100
C218CHIP CERAMIC CAP. SL J 15PF/50VCHD1JJBSL150
C219CHIP CERAMIC CAP. B K 0.01µF/50VCHD1JKB0B103
C220ELECTROLYTIC CAP.(SS.T) 220µF/10V M H7CA1A221S6028
C221CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C222CHIP CERAMIC CAP. F Z 2200PF/50VCHD1JZB0F222
C223CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C224CHIP CERAMIC CAP. F Z 1000PF/50VCHD1JZB0F102
C225CHIP CERAMIC CAP. CH J 560PF/50VCHD1JJBCH561
C231CHIP CERAMIC CAP. CH J 100pF/50VCHD1JJBCH101
C232CHIP CERAMIC CAP. CH J 100pF/50VCHD1JJBCH101
C233CHIP CERAMIC CAP. B K 0.01µF/50VCHD1JKB0B103
C235CERAMIC CAP.(AX) X K 4700pF/16VCCA1CKT0X472
C236CERAMIC CAP.(AX) F Z 0.047µF/16VCCA1CZTFZ473
C238CHIP CERAMIC CAP. F Z 1000PF/50VCHD1JZB0F102
C239ELECTROLYTIC CAP. 22µF/50V M orCE1JMASDL220
ELECTROLYTIC CAP. 22µF/50V MCE1JMASTL220
C240CERAMIC CAP.(AX) B J 560pF/50VCCA1JJT0B561
C241CHIP CERAMIC CAP. B K 4700pF/50VCHD1JKB0B472
C243ELECTROLYTIC CAP. 22µF/16V M LL orCE1CMASLL220
ELECTROLYTIC CAP. 22µF/16V M LLCE1CMASLH220
C245ELECTROLYTIC CAP. 220µF/16V M orCE1CMASDL221
ELECTROLYTIC CAP. 220µF/16V MCE1CMASTL221
C247ELECTROLYTIC CAP. 220µF/16V M orCE1CMASDL221
ELECTROLYTIC CAP. 220µF/16V MCE1CMASTL221
C252ELECTROLYTIC CAP.(SS.T) 100µF/16V M H7CA1C101S6028
C253ELECTROLYTIC CAP. 100µF/6.3V M orCE0KMASDL101
ELECTROLYTIC CAP. 100µF/6.3V MCE0KMASTL101
C254ELECTROLYTIC CAP. 47µF/35V M orCE1GMASDL470
ELECTROLYTIC CAP. 47µF/35V MCE1GMASTL470
C257CHIP CERAMIC CAP. F Z 1000PF/50VCHD1JZB0F102
C301CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C302CHIP CERAMIC CAP. CH J 33pF/50VCHD1JJBCH330
C303CHIP CERAMIC CAP. CH J 33pF/50VCHD1JJBCH330
C304CHIP CERAMIC CAP. CH J 33pF/50VCHD1JJBCH330
C309CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C310CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C314CHIP CERAMIC CAP. B K 0.01µF/50VCHD1JKB0B103
C315CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C316CHIP CERAMIC CAP. F Z 2.2µF/10VCHD1AZB0F225
C317CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C319CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C320CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C321ELECTROLYTIC CAP.(SS.T) 220µF/10V M H7CA1A221S6028
C322CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C323CHIP CERAMIC CAP. F Z 2.2µF/10VCHD1AZB0F225
C324CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C325CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C326CHIP CERAMIC CAP. F Z 1µF/10VCHD1AZB0F105
C327ELECTROLYTIC CAP. 100µF/10V M H7CE1AMAVSL101
200402241-16-1T4501EL
Page 64
Ref. No.DescriptionPart No.
C330CHIP CERAMIC CAP. F Z 0.01µF/50VCHD1JZB0F103
C331ELECTROLYTIC CAP.(SS.T) 220µF/10V M H7CA1A221S6028