Funai TVCR-2104 Service Manual

SERVICE MANUAL
Sec. 1: Main Section
I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBA’s I Exploded views I Parts List
21" COLOR TV/VCR COMBINATION
Sec. 2: Deck Mechanism Section
I Standard Maintenance I Alignment for Mechanism I Disassembly/Assembly of Mechanism I Alignment Procedures of Mechanism I Deck Exploded Views I Deck Parts List
TVCR-2104
This service manual is for TVCR-2104 series. When servicing these models, please confirm a model number on the rating label located on the backside of the cabinet. Refer to the rating label illustration at right (example: TVCR-A2104).
PAL
SECAMPAL
model number
rating label

MAIN SECTION

21" COLOR TV/VCR COMBINATION
TVCR-A2104/TVCR-B2104/
TVCR-C2104/TVCR-D2104/ TVCR-A2104T/TVCR-B2104T/ TVCR-C2104T/TVCR-D2104T/
TVCR-A2104TG
Sec. 1: Main Section
I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBA’s I Exploded Views I Parts List
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
Cabinet Disassembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1
Mechanical Trouble Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-7
Schematic Diagrams / CBA’s and Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1
System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1
IC Pin Function Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1
Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1
Cabinet Exploded Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1
Packing Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-3
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16-1

SPECIFICATIONS

Mode---------SP mode unless otherwise specified *Test input terminal
<Except Tuner>-------------Video input (1Vp-p) Audio input (-10dB) <Tuner>-----------------------Ant. input (80dBµV) Video: 87.5% mod.(BG/DK), 80.0% mod.(I) Audio: 30kHz div (1kHz Sin)
<DEFLECTION>
Description Condition Unit Nominal Limit
1. Over Scan % 90 85/95
2. Linearity Horizontal % ±15
Ver ti ca l % ± 10
3. High Voltage kV 25
<VIDEO & CHROMA>
Description Condition Unit Nominal Limit
1. Misconvergence Center m/m 0.6
Corner m/m 2.5
Side m/m 1.8
2. Contrast Control Range dB 6
3. Brightness APL 100% ft-L 35 24
4. Color Temperature K 8500
<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 T6700SP
<AUDIO>
All items are measured across 8 resistor at speaker output terminal.
Description Condition Unit Nominal Limit
1. Audio Output Power (Max.) (R/P) W 1.0 0.8
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 (-20dB 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)
6kHz (R/P)
dB dB
— —
5.0/-10
5.0/-10
<TV NORM, TUNER SENSIVITY, RECEPTIVE TV CHANNELS>
Model TV Norm Tuner Sensivity Receptive TV Channels
TVCR-A2104 TVCR-A2104T TVCR-A2104TG
TVCR-B2104 TVCR-B2104T
TVCR-C2104 TVCR-C2104T
PA L- B /G
PA L- I
SECAM-L/L’
PA L- B /G
NOM: VHF 46dBµV / UHF 47dBµV MAX: VHF 53dBµV / UHF 56dBµV
NOM: VHF 46dBµV / UHF 47dBµV MAX: VHF 53dBµV / UHF 56dBµV
NOM: VHF 47dBµV / UHF 47dBµV MAX: VHF 54dBµV / UHF 57dBµV
NOM: VHF 46dBµV / UHF 47dBµV MAX: VHF 53dBµV / UHF 56dBµV
E2 - E12, IA - IH, E21 - E69, S01 - S03, Z+1, Z+2, S1 - S41, gap2
IRA - IRJ, gapC, E21 - E69, S01 - S03, Z+1, Z+2, S1 - S41
F1 - F10, E21 - E69, FB - FQ, S4 - S41
E2 - E12, IA - IH, E21 - E69, S01 - S03, Z+1, Z+2, S1 - S41, gap2
TVCR-D2104 TVCR-D2104T
PA L/ S EC AM -B G /D K
PA L NOM: VHF 46dBµV / UHF 47dBµV MAX: VHF 53dBµV / UHF 56dBµV
SECAM NOM: VHF 47dBµV / UHF 47dBµV MAX: VHF 54dBµV / UHF 57dBµV
E2 - E12, E21 - E69, S01 - S03, Z+1, Z+2, S1 - S41, gap2, R1 - R12
1-1-2 T6700SP

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 custom­er, 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-
1-2-1 T6600SFTY
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.
1-2-2 T6600SFTY
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.
1-2-3 T6600SFTY
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
AC Line Voltage Clearance Distance (d) (d’)
220 to 240 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
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.).
3mm(d)
6 mm(d’)
Chassis or Secondary Conductor
Primary Circuit Terminals
dd’
Exposed Accessible Part
Z
AC Voltmeter (High Impedance)
Fig. 1
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
AC Line Voltage Load Z Leakage Current (i)
2kRES.
Connected in
220 to 240 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
parallel
50k RES.
Connected in
parallel
i0.7mA AC Peak
i2mA DC
i0.7mA AC Peak
i2mA DC
One side of
B
Power Cord Plug Prongs
One side of power cord plug
prongs (B) to:
RF or
Antenna terminals
A/V Input, Output
Fig. 2
1-2-4 T6600SFTY

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:
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.
(Top View)
(Top View)
Pin 1
Instructions for Connectors
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 (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.
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.
d. Preheating
Leadless capacitor must be preheated before installation. (130°C~150°C, for about two minutes.)
1-3-1 T6600STA
1.2. Standard solder
e. Soldering Iron
Use a pencil-type soldering iron (less than 30 watts).
f. Solder
Eutectic solder (Tin 63%, Lead 37%) is recom­mended.
g. Soldering time
Do not apply heat for more than 4 seconds.
h. 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.
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.
Tweezers
Chip
Soldering Iron
Tweezers
Soldering Iron
Solder
Soldering Iron
Presolder
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 Pack­IC.
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)
1-3-2 T6600STA
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.
Flat Pack-IC
Fine Tip Soldering Iron
Desoldering Braid
Soldering Iron
Fig. S-1-3
Sharp Pin
Fig. S-1-4
CBA
Fig. S-1-1
Hot-air Flat Pack-IC Desoldering Machine
Hot Air Blower
or
Iron Wire
Soldering Iron
To Solid Mounting Point
Fig. S-1-5
Example :
Masking Tape
Tweezers
Flat Pack-IC
Fig. S-1-2
Pin 1 of the Flat Pack-IC is indicated by a " " mark.
1-3-3 T6600STA
Fig. S-1-6
Presolder
<Correct>
Grounding Band
1M
CBA
Flat Pack-IC
CBA
Fig. S-1-7
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 (1M) 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 (1M) 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.
1M
Conductive Sheet or Copper Plate
<Incorrect>
CBA
1-3-4 T6600STA

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 the power on. (Use main power on the TV unit.)
2. Press [STANDBY/ON], [2], [7], [1], and [MUTE] but­tons on the remote control unit in that order within 5 seconds. When entering the service mode, “4” will display at corners of the screen.
3. During the service mode, electrical adjustment mode can be selected by remote control key.
Details are as follows.
Key Adjustment Mode
6 No need to use.
7 No need to use.
8
9
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.
H. Shift adjustment mode: See adjust­ment instructions page 1-6-4.
V.size/V. shift adjustment: See adjust­ment instructions page 1-6-4.
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)
Q202 (START SENSOR)
Key Adjustment Mode
Picture adjustment mode: Press the MENU button to change from BRT (Bright), *CNT (Contrast), *COL
MENU
VOL-
0
1 No need to use.
2
3
4
5
(Color), *TNT(Tint) and SHP(SHARP). Press PROG+/PROG- key to adjust Initial Value. *Marked items are not necessary to adjust normally.
SECAM Black Level adjustment mode: See adjustment instructions page 1-6-3. Cut-Off adjustment mode: See adjust­ment instructions page 1-6-4. White Balance adjustment mode: See adjustment instructions page 1-6-5.
C-Trap adjustment mode: See adjust­ment instructions page 1-6-3.
H adjustment mode: See adjustment instructions page 1-6-2.
Head switching point adjustment mode (Auto adjustment): See adjustment instructions page 1-6-7.
Auto record mode: Perform recording (15 Sec.)-->Stop-->Rewind (Zero return) automatically.
Head switching point adjustment mode (Manual adjustment): See adjustment instructions page 1-6-7.
SW211
(REC-SAFETY SW)
MAIN CBA
1-4-1 T6600PFS

CABINET DISASSEMBLY INSTRUCTIONS

Comparison Chart of Models and Marks
Model Mark
TVCR-A2104 A TVCR-B2104 B TVCR-C2104 C
TVCR-D2104 D TVCR-A2104T E TVCR-B2104T F TVCR-C2104T G TVCR-D2104T H
TVCR-A2104TG I
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.
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.
[1] Rear Cabinet
[2] Power Unit and Tray Chassis Unit
[3] Power Unit[5] H.V./Power
Supply CBA
[4] Tray Chassis Unit
REMOVAL
ID/
LOC.
No.
[3] Power Unit 3,5
[4]
[5]
[6] Top Cover 3 5(S-4), CL604 5
[7]
[8] Deck Unit 3, 5
[9]
[10] Main CBA 3 4(S-10) 9
[11] CRT 4 4(S-11) 10
(1)
PA RT
Tr ay Chassis Unit
H.V./Power Supply CBA
Bottom Plate
Tex t C BA - -
[ E,F,G,H,I ]
(2)
REMOVE/ *UNHOOK/
Fig.
UNLOCK/RELEASE/
No.
UNPLUG/ DESOLDER
*CN502, *CN552, *CN602
3 ---------- -
36(S-3) 4
3(S-5) 6
7(S-6), (S-7), (S-8), Desolder *(CN201, CL401, CL402, CL403)
3, 5
(S-9), TE Holder, *CN751, *CN752
(3)
(4)
Note
3
7
8
(5)
[6] Top Cover
[7] Bottom Plate
[8] Deck Unit
[9] Text CBA [ E,F,G,H,I ]
[10] Main CBA
[11] CRT
2. Disassembly Method
REMOVAL
ID/
LOC.
No.
[1]
[2]
PAR T
Rear Cabinet
Power Unit and Tray Chassis Unit
REMOVE/ *UNHOOK/
Fig.
UNLOCK/RELEASE/
No.
UNPLUG/ DESOLDER
1,2,5
3,4,5
6(S-1), 2(S-2), *CN151
Anode Cap, *CN501, *CN551, *CN601, CRT CBA, Power Knob
Note
1
2
(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
Ta bl e ."
Reference Notes in the Table
1. Removal of the Rear Cabinet.
Remove six screws (S-1) and two screws (S-2). Disconnect connector CN151 and remove the Rear Cabinet.
Caution !!
Discharge the Anode Lead of the CRT with the CRT Ground Wire before removing the Anode Cap.
2. Removal of the Power Unit and Tray Chassis Unit.
Discharge the Anode Lead of the CRT with the
1-5-1 T6700DC
CRT Ground before removing the Anode Cap. Disconnect the following: Anode Cap, CN501, CN551, CN601, CRT CBA, and Power Button. Then pull the Power Unit and Tray Chassis Unit out backward.
3. Removal of the Power Unit. Disconnect connectors CN502, CN552, and CN602. Then slide the Power Unit out.
4. Removal of the H.V./Power Supply CBA. Remove six screws (S-3) and pull up the H.V./ Power Supply CBA.
5. Removal of the Top Cover. Remove five screws (S-4) and CL604, and remove the Top Cover.
6. Removal of the Bottom Plate. Remove a screw (S-5). Then slide the Bottom Plate out front.
7. Removal of the Deck Unit. Remove seven screws (S-6), screw (S-7) and screw (S-8). Then, desolder connectors (CN201, CL401, CL402, CL403) and lift up the Deck Unit.
8. Removal of the Text CBA. [ E,F,G,H,I ] Remove a screw (S-9) and TE Hplder, and discon­nect connectors CN751 and CN752. Then, lift the Text CBA up.
9. Removal of the Main CBA. Remove four screws (S-10) and pull up the Main CBA.
10.Removal of the CRT. Remove four screws (S-11) and pull the CRT back­ward.
(S-1)
(S-1)
(S-2)
(S-1)
(S-1)
(S-1)
(S-1)
[1] REAR CABINET
(S-2)
(S-1)
Fig. 1
(S-1)
(S-1)
(S-2)
(S-1)
(S-1)
(S-1)
[1] REAR CABINET
1-5-2 T6700DC
Fig. 2
(S-4)
(S-4)
(S-4)
[4] Tray Chassis Unit
(S-4)
(S-6)
[8] Deck Unit
(S-10)
(S-7)
(S-4)
(S-10)
(S-6)
[6] Top Cover
(S-6)
(S-6)
(S-10)
[9] Text CBA
(S-8)
A
CL604
[ E,F,G,H,I ]
(S-9)
TE Holder
(S-10)
[10] Main CBA
Power Button
[2] Power Unit and Tray Chassis Unit
(S-3)
(S-3)
(S-3)
(S-5)
[7] Bottom Plate
[5] H.V./Power
(S-3)
Supply CBA
[3] Power Unit
1-5-3 T6700DC
A
Fig. 3
(S-11)
(S-11)
[11] CRT
Anode Cap
CRT CBA
(S-11)
(S-11)
Fig. 4
1-5-4 T6700DC
ANODE
CRT
GND
CRT CBA
CN501B
SCREEN
CN502
H.V./POWER SUPPLY CBA
CN552
CL501A
FOCUS
CN501
CN551
MAIN CBA
CN151
CN601 TO DEGAUSS COIL
CL403
CL401
CL402
CN201
CN751
CL603A
CN602
CL302A
CL301A
CN752
[ E,F,G,H,I ]
TEXT CBA
CN901
CN902
TO SPEAKER
CYLINDER ASSEMBLY
FE HEAD
CAPSTAN
ACE HEAD ASSEMBLY
MOTOR
TO TOP COVER
DECK UNIT
CL604
1-5-5 T6700DC
Fig. 5

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. PAL Pattern Generator (Color Bar, Monoscope, Black Raster, White Raster, Sympte)
2. SECAM Pattern Generator (Gray Scale)
3. AC Milli Voltmeter (RMS)
4. Alignment Tape (FL6A), Blank Tape (E180)
5. DC Voltmeter
6. Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div, F-Range: DC~AC-60MHz
7. Frequency Counter
8. Plastic Tip Driver
9. RF input (at each broadcasting system) Receiving Channel : VHF Low Input level : 80dBµV
10.Ext.input FRONT VIDEO-IN JACK or REAR SCART JACK
How to set up the option code
1. Enter the Service mode.
2. Press the [STATUS] button on the remote control unit. The option code appears on the display.
3. If needed, input the option code as shown below using number buttons on the remote control unit.
Model Option Code
TVCR-A2104 0130
TVCR-A2104T 0178
TVCR-A2104TG 0242
TVCR-B2104 0128
TVCR-B2104T 0176
TVCR-C2104 0129
TVCR-C2104T 0177
TVCR-D2104 0131
TVCR-D2104T 0179
4. To reset the software, press [PAUSE] and [5] but­tons on the remote control unit. The option code is changed.
How to Set up the Service mode:
NOTE:
After replacing the IC202 (Memory) or Main CBA, the set value in IC202 (Memory) will be lost. So it is necessary to set up or adjust in the Service mode after its replacement.
Service Mode:
1. Turn the power on. (Use main power on the TV unit.)
2. Press [STANDBY/ON], [2], [7], [1], and [MUTE] but­tons on the remote control unit in that order within 5 seconds.
- To cancel the service mode, press [STANDBY/ON] button on the remote control.
1-6-1 T6700EA
1. DC 114V (+B) Adjustment
2. H Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
unit does not operate correctly.
Test point Adj. Point Mode Input
TP503
(+B),
TP504
(GND)
Tape M. EQ . Spec.
---
Note: TP503(+B), TP504(GND), VR601 --- H.V./Power Supply CBA
1. Connect the unit to AC Power Outlet. (exact AC230V)
2. Input a color bar signal from RF (or Ext.) input and leave it for at least 20 minutes.
3. Connect DC Volt Meter to TP503(+B) and TP504(GND).
4. Adjust VR601 so that the voltage of TP503(+B) becomes +114±0.5V DC.
VR601
DC Voltmeter,
Plastic Tip Driver
RF
(or Ext.)
+114±0.5V DC
Color
Bar
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
R590
Tape M. EQ. Spec.
--- Frequency Counter 15.625kHz±75Hz
Note: R590 --- H.V./Power Supply CBA
1. Connect Frequency Counter to R590.
2. Set the unit to the Ext. mode and no input is neces­sary. Enter the Service mode. (See page 1-6-1.)
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 [PROG+/PROG-] 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
15.625kHz±75Hz.
6. Turn the power off and on again.
PROG+/PROG-
buttons
Ext. ---
1-6-2 T6700EA
3. C-Trap Adjustment
4. SECAM Black Level 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 point Adj. Point Mode Input
J349F3
(B-OUT)
Tape M. EQ. Spec.
---
minimum
Note: J349F3 (B-Out)--- Main CBA
1. Connect Oscilloscope to J349F3.
2. Input a color bar signal from RF (or Ext.) input. Enter the Service mode. (See page 1-6-1.)
3. Press [0] button on the remote control unit and select C-TRAP mode.
4. Press [PROG+/PROG-] buttons on the remote con­trol unit so that the carrier leakage B-Out (4.43MHz) value becomes minimum on the oscillo­scope.
5. Turn the power off and on again.
PROG+/PROG-
buttons
Oscilloscope,
Pattern Generator
Figure
RF
(or Ext.)
200mVp-p Max.
Color Bar
Fig. 1
Purpose: To set Black Level of the SECAM signal R-
Y/B-Y to Ref. level.
Symptom of Misadjustment: If Black Level of the SECAM signal R-Y/B-Y is incorrect, the picture is blu­ish or reddish in grayscale compared with PAL signal.
Test
point
J361G4
Tape M. EQ. Spec.
---
Analog Oscilloscope (unus-
able Digital Oscilloscope)
1. Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.
2. Input the SECAM Gray Scale signal from Ext. input.
3. Enter the service mode. (See page 1-6-1.)
4. To enter the C/D/S mode, press [VOL-] on the remote control unit.
5. To select SBR (SECAM Black Level R-Y), press [6] button on the remote control unit.
6. Press [PROG+/PROG-] buttons to adjust Y signal to the black ref. level.
7. To select SBB (SECAM Black Level B-Y), press [7] button on the remote control unit.
8. Press [PROG+/PROG-] buttons to adjust Y signal to the black ref. level.
Y Signal
Adj. Point Mode Input
PROG+/PROG-
buttons
Pattern Generator,
Ext.
SECAM
Gray
Scale
---
1H
Black REF. Level
1H
1-6-3 T6700EA
1H
5mV/Div (10:1 Prove)
Fig. 4
5. V. Size Adjustment
7. 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 point Adj. Point Mode Input
Screen
Tape M. EQ. Spec.
--- Pattern Generator 90±5%
1. Enter the Service mode. (See page 1-6-1.) 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 and leave it for at least 20 minutes.
3. Press [PROG+/PROG-] buttons on the remote con­trol unit so that the monoscope pattern is 90±5% of display size and the circle is round.
PROG+/PROG-
buttons
RF
(or Ext.)
Monoscope
6. V. Shift Adjustment
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.
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 Input
Screen
Tape M. EQ. Spec.
--- Pattern Generator 90±5%
1. Enter the Service mode. (See page 1-6-1.) Press [8] button on the remote control unit and select H-P mode.
2. Input monoscope pattern and leave it for at least 20 minutes.
3. Press [PROG+/PROG-] 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.
PROG+/PROG-
buttons
RF
(or Ext.)
Monoscope
8. 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 point Adj. Point Mode Input
Test point Adj. Point Mode Input
Screen
Tape M. EQ. Spec.
--- Pattern Generator 90±5%
1. Enter the Service mode. (See page 1-6-1.) 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 and leave it for at least 20 minutes.
3. Press [PROG+/PROG-] buttons on the remote con­trol unit so that the top and bottom of the mono­scope pattern are equal to each other.
PROG+/PROG-
buttons
RF
(or Ext.)
Monoscope
Screen-Control,
Screen
Tape M. EQ. Spec.
--- Pattern Generator
Notes:
Screen Control (FBT) --- H.V./Power Supply CBA FBT= 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 (or Ext.) input.
3. Enter the service mode. (See page 1-6-1.) Dimmed horizontal line appears on the CRT.
4. To enter the C/D/S mode, press the [VOL-] button on the remote control unit.
5. To enter the CUT OFF (R) mode, press [1] button on the remote control unit.
6. Turn the screen control up until dimmed horizontal line appears.
PROG+/PROG-
buttons
RF
(or Ext.)
Black Ras-
See Reference
Notes below
ter
1-6-4 T6700EA
7. Press the [PROG+/PROG-] buttons until the hori­zontal line becomes white.
8. To enter the CUT OFF (G) mode, press [2] button on the remote control unit.
9. Press the [PROG+/PROG-] buttons until the hori­zontal line becomes white.
10.To enter the CUT OFF (B) mode, press [3] button on the remote control unit.
11.Press the [PROG+/PROG-] buttons until the hori­zontal line becomes white.
12.Turn the screen control so that the horizontal line adjusted white looks lightly.
13.Turn the power off and on again.
9. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white. Symptom of Misadjustment: White becomes bluish
or reddish.
Test point Adj. Point Mode Input
Screen-Control,
Screen
Tape M. EQ . Spe c .
---
PROG+/PROG-
buttons
Pattern Generator,
Color analyzer
Figure
RF
(or Ext.)
See below
White
Raster
(APL 100%)
Color Ajalyzer
Note: Use remote control unit
1. Operate the unit more than 20 minutes.
2. Face the unit to east. Degauss the CRT using De­gaussing Coil.
3. Input the White Raster (APL 100%).
4. Set the color analyzer to the CHROMA mode and after zero point calibration, bring the optical recep­tor to the center on the tube surface (CRT).
5. Enter the Service mode. Press [VOL-] button on the remote control.
6. Press [4] button on the remote control unit for Red adjustment. Press [5] button on the remote control unit for Blue adjustment.
7. In each color mode, Press [PROG+/PROG-] but­tons to adjust the values of color.
8. Adjusting Red and Blue color so that the tempera­ture becomes 8500K (x : 290 / y : 300) ±3%.
9. At this time, Re-check that Horizontal line is white. If not, Re-adjust Cut-off Adjustment until the Hori­zontal Line becomes pure white.
10. Turn off and on again to return to normal mode. Re­ceive APL 100% white signal and Check Chroma temperatures become 8500K (x : 290 / y : 300) ±3%.
Note: Confirm that Cut Off Adj. is correct after this adjustment, and attempt Cut Off Adj. if needed.
Fig. 5
1-6-5 T6700EA
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.
Test point Adj. Point Mode Input
Screen
Tape M . E Q . Spe c.
---
White
Note: Bar (A) in Fig. 7 --- 0 IRE
1. Enter the service mode. (See page 1-6-1.) Then input SYMPTE signal from RF (or Ext.) input and leave it for at least 20 minutes.
2. Press [MENU] button. (Each time [MENU] button is pressed, display will change BRT, CNT, COL, TNT, and SHP in that order.) Select BRT and press [PROG+/PROG-] buttons so that the bar (A) in Fig. 6 is just visible.
3. Turn the power off and on again.
PROG+/PROG-
buttons
Pattern
Generator
Figure
RF
(or Ext.)
See below
ABC
SYMPTE
Black
This bar (A) just visible
Fig. 6
11. Setting for CONTRAST, COLOR, TINT and SHARP Data Values
General
1. Enter the Service mode. (See page 1-6-1)
2. Press [MENU] button. (Each time [MENU] button is pressed, display will change BRT, CNT, COL, TNT, and SHP in that order.)
CONTRAST (CNT)
1. Press [MENU] button on the remote control unit. Then select CNT display.
2. Press [PROG+/PROG-] buttons on the remote control unit so that the value of "CONTRAST" (CNT) becomes 83.
COLOR (COL)
1. Press [MENU] button on the remote control unit. Then select "COLOR" (COL) display.
2. Press [PROG+/PROG-] buttons on the remote control unit so that the value of "COLOR" (COL) becomes 65.
TINT (TNT)
1. Press [MENU] button on the remote control unit. Then select "TINT" (TNT) display.
2. Press [PROG+/PROG-] buttons on the remote control unit so that the value of "TINT" (TNT) be­comes 68.
SHARP (SHP)
1. Press [MENU] button on the remote control unit. Then select "SHARP" (SHP) display.
2. Press [PROG+/PROG-] buttons on the remote control unit and select "0."
1-6-6 T6700EA
12. Focus Adjustment
13. Head Switching Position Adjustment
Purpose: Set the optimum Focus.
Symptom of Misadjustment: If Focus Adjustment is
incorrect, blurred images are shown on the display.
Test point Adj. Point Mode Input
Screen Focus Control
Tape M . EQ. Spec.
--- Pattern Generator See below.
Note: Focus VR (FBT) --- H.V./Power Supply 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.
RF
(or Ext.)
Monoscope
Purpose: Determine the Head Switching Position 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).
Manual Adjustment
1. Enter the service mode. (See page 1-6-1.)
2. Playback the test tape (FL6A).
3. Press the number [5] button on the remote control unit.
4. The Head Switching position will display on the screen; if adjustment is necessary follow step 4.
7.0H (448µs) is preferable.
5. Press [PROG+/PROG-] buttons 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
6. Turn the power off and on again.
Auto Adjustment
1. Load the test tape (FL6A) that have been recorded the Head Switching Position Value.
2. Enter the service mode.
3. Press [3] button on the remote control unit in the tape stop mode. The unit playback and adjust the Head Switching Position automatically.
4. The adjusting report appears on upper left corner of the screen with blueback. In case of adjusting correctly: the Head Switching Position Value recorded in the test tape (FL6A) is indicated with green. In case of adjusting incorrectly: "NG" (red) is indi­cated with ejecting tape.
l
TVCR TVCR
7.0H
NG
Correct
1-6-7 T6700EA
Incorrect
Fig. 7

BLOCK DIAGRAMS

Servo/System Control Block Diagram
I
F
H
G
Model Mark
TVCR-A2104TG
TVCR-B2104T
TVCR-C2104T
TVCR-D2104T
E
A
B
D
C
Model Mark
TVCR-D2104
TVCR-A2104T
TVCR-A2104
TVCR-B2104
Comparison Chart of Models & Marks
TVCR-C2104
SW201 SW205
IC201
(SERVO/SYSTEM CONTROL)
AL+5V
KEY SWITCH
KEY SWITCH
SW206 SW210
8
7
KEY-2
KEY-1
REMOTE
14
REMOTE
SENSOR
RS201
D201
S-LED
TO POWER
SUPPLY BLOCK
P-ON-H
P-DOWN-L
85
67
P-ON-H
P-DOWN-L
CTL AMP-OUT
CTL(+)
95
97
TP001
CTL
WF3
D202 REC
CTL(-)
94
AL+5V
D204 STANDBY
24
23
REC-LED
REC-LED
AL+5V
LD-SW
SW212
LD-SW
9
(MEMORY)
SCL
IC202
6
71
SCL
ST-SENS.
10480
SDA
CS
5
7
72
45
SDA
C-OPEN
2
I
T-REEL
END-SENS.
SCL
T-REEL
TO
TV BLOCK
SDA
C-OPEN
2
I
Q204
SCL
RESET
34
RESET
TIMER+5V
SDA
SP-MUTE
TO
AUDIO BLOCK
EXT-L
A-MUTE-H
424829
20
44
EXT-L
SP-MUTE
A-MUTE-H
SCART-H
SCART-MUTE
SCART-H
SCART-MUTE
CM+12V
1CM+12V
CN201
SCL
REC
SAFETY
SW211
31
REC-SAFETY
C-FG
C-F/R
87
78
P-ON+5V(3)
4C-F/R
2P-ON+5V(3)
3C-FG
SDA
C-CONT
76
6FG-GND
5
D-REC-H
LD-CONT81D-CONT
D-PFG
77
90
7LD-CONT
8D-CONT
9
TO
C-SYNC
DV-SYNC
74
47
C-SYNC
D-REC-H
AL+12V(1)
10M-GND
11AL+12V(1)
VIDEO BLOCK
V-ENV
RF-SW
C-ROTA
18
15613
V-ENV
RF-SW
C-ROTA
DV-SYNC
+33V
12VG
C,G
TRICK-H
SECAM-H
32
33
TRICK-H
SECAM-H
MAIN CBA
)
ASSEMBLY
(DECK
CL402
2CTL(+)
1CTL(-)
AC HEAD ASSEMBLY
CONTROL
HEAD
END-SENS.
ST-SENS.
Q202 Q205Q201
1-7-1
SENSOR CBA
(END-SENSOR)
SENSOR CBA
(ST-SENSOR)
C-CONT
M
CAPSTAN
PG
SENSOR
MOTOR
M
DRUM
MOTOR
CAPSTAN MOTOR
CYLINDER ASSEMBLY
D-PFG
M
LOADING
MOTOR
T6700BLS
Video Block Diagram
I
F
H
G
Model Mark
TVCR-B2104T
TVCR-C2104T
TVCR-D2104T
TVCR-A2104TG
E
A
B
D
C
Model Mark
TVCR-D2104
TVCR-A2104T
TVCR-A2104
TVCR-B2104
Comparison Chart of Models & Marks
TVCR-C2104
VIDEO (L)
HEAD
VIDEO (R)
HEAD
CYLINDER ASSEMBLY
(DECK ASSEMBLY)
123
V(L)
V(R)
CL401
V-COM
969593
94
WF1
RF-SW
TP002
RF-SW
D-REC-H
80
TO SERVO/SYSTEM
CONTROL BLOCK
C-ROTA
DV-SYNC
62
70
V-ENV
C-SYNC
84
C,G
TRICK-H
SECAM-H
IC471 (PAL/SECAM DECTECOTR)
67
1
29
28
PAL/SECAM
DETECTOR
17
12216
14
SP
HEAD
AMP
SERIAL
DECORDER
Y. DELAY
P
R
LUMINANCE
SIGNAL
PROCESS
WF4
7978
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
69684643
SDA
SCL
65
TO
SERVO/SYSTEM
CONTROL BLOCK
IC401
(VIDEO/AUDIO SIGNAL PROCESS)
AGC
BYPASS
TUNER
SCART
485254
LINE
Y
CCD 1H DELAY
CHARA.
INS.
SCART
LINE
56
REC FM
AGC
+
C
1/2
MUTE
PB/EE
D-REC-H
RF-SW/C-ROTA
RPRP
CHROMINANCE
SIGNAL
PROCESS
MUTE
TUNER
PB/EE
DV-SYNC
Y/C
MIX
FBC
V-ENV
C-SYNC
PR
PB-H OUT
21
WF6
C-PB
TP008
WF2
2928 44
X401
4.43MHz
AGC VXO
58 59
61
63
MAIN CBA
C-VIDEO
TO
TV BLOCK
TU001
17
VIDEO OUT
JK701
V-IN
JK703
20
19
V-IN
V-OUT
1-7-2
BUFFER
Q703
WF5
TP003
Q401
V-OUT
TU-VIDEO
TO
TV BLOCK
BUFFER
VIDEO
TP010
GND
T6700BLV
Audio Block Diagram
SP151
SPEAKER
JK151
Mode : SP/REC
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
HEADPHONE JACK
1
AMP
OUTPUT
MUTE
CL801
CN151
SP1SP-GND 2
5
TO
SERVO/SYSTEM
CONTROL BLOCK
SP-MUTE
ALC
12
DET
INV
11
MUTE
LINE
ALC
R
AMP
ATT
98
WF8
N-A-PB
TP007
TO
SERVO/SYSTEM
CONTROL BLOCK
SCL
SDA
A-MUTE-H
SERIAL
DECODER
AUDIO HD-SW
CONTROL
71
68 69
16
REC-ON
P
REC
AMP
100
IC151 (AMP)
7
MAIN CBA
50
ATT
(VIDEO/AUDIO/CHROMA/DEFLECTION/IF)
LINE
TUNER
IC301
52
53
WF7
AUDIO
54
MUTE
IC701 (SW)
WF9
7
EQ
AMP
SP/LP-ON
PB-ON
TUNER
LINE
IC401
(AUDIO SIGNAL PROCESS)
13
4
14
SCART
LINE
SCART
LINE
1
2155
3
12
17
SW CTL
5
6
+5V
Q854
TO SERVO
/SYSTEM
CONTROL
BLOCK
EXT-L
SCART-H
1011 9
SCART-MUTE
CL402
3 A-PB/REC
3
AUTO
1
Q855
BIAS
2
BIAS
OSC
4 A-COM
6 AE-H/FE-H
Q856
Q853(PB=ON)
5 FE-H
+5V
SWITCHING
D-REC-OFF
Q851
CL403
1 FE-H
Q852(PB=ON)
2 FE-H-GND
TU001
6
AUDIO OUT
JK702
A-IN
JK703
2
A-IN
1
A-OUT
1-7-3
Q701
AUDIO
HEAD
AUDIO
ERASE
HEAD
(DECK ASSEMBLY)
FE HEAD
ACE HEAD ASSEMBLY
FULL
ERASE
HEAD
T6700BLA
TV Block Diagram
I
F
H
G
Model Mark
TVCR-A2104TG
TVCR-B2104T
TVCR-C2104T
TVCR-D2104T
E
A
B
D
C
Model Mark
TVCR-D2104
TVCR-A2104T
TVCR-A2104
TVCR-B2104
Comparison Chart of Models & Marks
TVCR-C2104
TO
VIDEO BLOCK
TU-VIDEO
VIDEO
36
34
X301
4.43MHz
32
TO
BLUE2
CL301A
16
CRT/H.V. BLOCK
CL301B
GREEN1
RED 3
143115
CL302A
WF11
TO
CRT/H.V. BLOCK
CL302B
FBP2
6
V-DRIVE3
H-DRIVE1
ACL5
V-RAMP-FB4
7
Mode : SP/REC
REC VIDEO SIGNAL PB VIDEO SIGNAL
IC301 (VIDEO/AUDIO/CHROMA/DEFLECTION/IF)
MAIN CBA
LINE/PB
CHROMA
BPF
CHROMA
TRAP
SYNC
SEPARATION
SERIAL
I/F
INTELLIGENT
MONITORING
40
11
10
43
Q711
+5V
Q706
Q704
Q702
SECAM
DECODER
PAL
DECODER
LUMA
SIGNAL
+5V
IC703 (SW)
PROCESS
CIRCUIT
5
342
H-SYNC
PROCESS
CIRCUIT
V-SYNC
PROCESS
CIRCUIT
15
BASE BAND
1H DELAY LINE
14
1
12
13
17
21
SW CTL
109 11
27
Q710
OSD MIX/RBG MATRIX/
BLANKING
INV
12
302820
13
WF10
CLOCK
CONTROL
CIRCUIT
TUNER
TUNER
LINE/PB
E,F,G,H,I
IC901 (TELETEXT DECODER)
CN752CN902
22OSD-BLK
44OSD-B
55Y-SW-OUT
22H-SYNC
44SDA
11V-SYNC
CN901 CN751
3723365049353233344142
C I/F
2
DISPLAY
TIMING
I
ADC/
DATA SLICER
33SCL
66OSD-G
DECODER
TELETEXT
33OSD-R
X901
12MHz
OSC
TEXT CBA
OSC/CLOCK
GENERATOR
1
CN303
C-OPEN 2
2
INT.MONITOR
I
SDA 4
SCL 5
(NO CONNECTION)
CN303 is used for
adjustment at factory
SCL
C-OPEN
2
I
TO
SERVO/SYSTEM
1-7-4
SDA
CONTROL BLOCK
JK703
SLOW-SW
7
16811
OSD-B
RAPID-SW
OSD-G
15
OSD-R
IC201
(SYSTEM CONTROL/OSD)
64
82
OSD-R
TEXT-L
C-VIDEO
56
C-VIDEO
TO
VIDEO
BLOCK
OSD-B
OSD-G
606263
OSD-BLK
SLOW-SW-IN
616568
59
V-SYNC
RGB CONT
RAPID-SW-IN
WF18
58
H-SYNC
WF17
T6700BLT
CRT/H.V. Block Diagram
V-
DRIVEH-DRIVE
DEFLECTION-YOKE
543
WF13
Mode : SP/REC
1
CN551
ANODE
JK501
FOCUS
SCREEN
GND
V501
RGB
CRT
HEATER
GND
CN501
WF16
REC VIDEO SIGNAL PB VIDEO SIGNAL
IC551 (V-DEFLECTION CONTROL)
THERMAL
PROTECTION
7
5
AMP
WF15WF14
Q501
Q502
RED AMP
BLUE AMP
Q503
GREEN AMP
CRT CBA
CL501BCL501A
2
VCC
UP
T552
Q551
H.OUTPUT
3
6
PUMP
1
ANODE
FOCUS VR
HV
T551 F.B.T.
F
S
11
1
FOCUS
SCREEN
SCREEN VR
810796
5
3
HEATER 11
P-ON+160V 33
4
WF12
Q533
H.DRIVE
CN552
33V-DRIVE
11H-DRIVE
22FBP
55ACL
44V-RAMP-FB
H.V./POWER SUPPLY CBA
+B
DEF+B
TO
POWER SUPPLY
BLOCK
CN302CL302B
JUNCTION-B
CBA
125
TO TV
BLOCK
3
4
CL302A
1-7-5
CN502
32RED
CN301CL301B
321
TO TV
14GREEN
23BLUE
BLOCK
CL301A
JUNCTION-C
CBA
T6700BLCRT
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