Aiwa VX-D2150 User manual

SERVICE MANUAL
DATA
BASIC TAPE MECHANISM : OVD-7
INTEGRATED COLOR TV /VIDEO
CASSETTE RECORDER
VX-D2150
S/M Code No. 09-028-362-4N1
K(S)
230V AC, 50Hz
60W
Standby 5W
Approx.25.5 kg (56.1 lbs.)
574 mm (W) x 488.5 mm (D) x
514.5 mm (H)
(22 5/8 x 19 1/4 x 20 3/8 in.)
21 in. (50.8 cm “V”), 90 degree
deflection
Frequency synthesized tuners
UHF: 21 to 69
I
240 lines
5°C to 40°C
Rotary 2 head helical scanning system
PAL colour signal, 625 lines, 50 fields
Azimuth 2 heads
VHS video cassettes
SPECIFICATIONS
PAL
SP: 23.39 mm/sec.
LP: 11.69 mm/sec.
NTSC (playback SP only)
33.35 mm/sec.
PAL
SP: 5 hours max. with E-300 tape
LP: 10 hours max. with E-300 tape
NTSC (playback SP only)
3 hours 30 minutes max. with T-210
tape
1.0Vp-p, 75 ohm, unbalanced
1.0Vp-p, 75 ohm, unbalanced
53dB (nominal)
SCART: –3.8 dBs, 50K ohm
RCA: –3.8 dBs, 50K ohm
SCART: –3.8 dBs less than 1K ohm
1 track (mono)
TAPE SPEED ...................................
RECORDING/PLAYBACK TIME .....
VIDEO INPUT...................................
VIDEO OUTPUT ..............................
VIDEO S/N .......................................
AUDIO INPUT ..................................
AUDIO OUTPUT ..............................
AUDIO TRACK .................................
POWER REQUIREMENTS............
POWER CONSUMPTION..............
WEIGHT .........................................
DIMENSIONS.................................
PICTURE TUBE .............................
TUNER SYSTEM ...........................
CHANNEL COVERAGE.................
TV SYSTEM ...................................
HORIZONTAL RESOLUTION .......
OPERATING TEMPERATURE......
VIDEO RECORDING SYSTEM .....
VIDEO SIGNAL SYSTEM ..............
VIDEO HEAD .................................
USABLE CASSETTES...................
Design and specifications are subject to change without
notice.
•

TABLE OF CONTENTS
SPECIFICATIONS ..............................................................................................................................................................
TABLE OF CONTENTS ......................................................................................................................................................
SERVICING NOTICES ON CHECKING .............................................................................................................................
TAPE REMOVAL METHOD AT NO POWER SUPPLY......................................................................................................
DISASSEMBLY INSTRUCTIONS
REMOVAL OF MECHANICAL PARTS AND P.W. Boards ..............................................................................................
REMOVAL OF DECK PARTS .........................................................................................................................................
REMOVAL OF ANODE CAP ...........................................................................................................................................
REMOVAL AND INSTALLATION OF FLAT PACKAGE IC .............................................................................................
KEY TO ABBREVIATIONS .................................................................................................................................................
SERVICE MODE LIST ........................................................................................................................................................
PREVENTIVE CHECKS AND SERVICE INTERVALS .......................................................................................................
WHEN REPLACING EEPROM (MEMORY) IC ..................................................................................................................
SERVICING FIXTURES AND TOOLS................................................................................................................................
PREPARATION FOR SERVICING .....................................................................................................................................
VCR TEST TAPE INTERCHANGEABILITY TABLE ...........................................................................................................
MECHANICAL ADJUSTMENTS
CONFIRMATION AND ADJUSTMENT ...........................................................................................................................
CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM ..................................................................
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE .............................................................................................
ELECTRICAL ADJUSTMENTS
ADJUSTMENT PROCEDURE.........................................................................................................................................
BASIC ADJUSTMENTS ..................................................................................................................................................
PURITY AND CONVERGENCE ADJUSTMENTS ..........................................................................................................
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE .............................................................................................
TROUBLESHOOTING GUIDES .........................................................................................................................................
IC DESCRIPTIONS ............................................................................................................................................................
SERVO TIMING CHART ....................................................................................................................................................
SYSTEM SWITCH MODE ..................................................................................................................................................
SEMICONDUCTOR BASE CONNECTIONS......................................................................................................................
BLOCK DIAGRAMS
TV ....................................................................................................................................................................................
Y/C/AUDIO/HEAD AMP...................................................................................................................................................
MICON/POWER ..............................................................................................................................................................
IF/21PIN/IN/OUT .............................................................................................................................................................
T'TEXT.............................................................................................................................................................................
PRINTED WIRING BOARDS (SYSCON) ...........................................................................................................................
Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM ..............................................................................................................
MICON SCHEMATIC DIAGRAM ........................................................................................................................................
POWER SCHEMATIC DIAGRAM ......................................................................................................................................
21PIN/IN/OUT SCHEMATIC DIAGRAM .............................................................................................................................
CHROMA/IF SCHEMATIC DIAGRAM ................................................................................................................................
SOUND AMP SCHEMATIC DIAGRAM ..............................................................................................................................
SECAM CHROMA/HI-FI .....................................................................................................................................................
REGULATOR SCHEMATIC DIAGRAM.............................................................................................................................
T'TEXT SCHEMATIC DIAGRAM ........................................................................................................................................
PRINTED WIRING BOARDS (MAIN/CRT/POWER SW./IF) ..............................................................................................
TV POWER SCHEMATIC DIAGRAM .................................................................................................................................
DEFLECTION SCHEMATIC DIAGRAM .............................................................................................................................
CRT SCHEMATIC DIAGRAM.............................................................................................................................................
IF SCHEMATIC DIAGRAM ................................................................................................................................................
INTERCONNECTION DIAGRAM .......................................................................................................................................
WAVEFORMS ....................................................................................................................................................................
MECHANICAL EXPLODED VIEW......................................................................................................................................
MECHANICAL REPLACEMENT PARTS LIST ...................................................................................................................
ACCESSORY REPLACEMENT PARTS LIST ....................................................................................................................
CHASSIS EXPLODED VIEW (TOP VIEW) ........................................................................................................................
CHASSIS EXPLODED VIEW (BOTTOM VIEW) ................................................................................................................
CHASSIS REPLACEMENT PARTS LIST...........................................................................................................................
ELECTRICAL REPLACEMENT PARTS LIST ....................................................................................................................
A1-1
COVER
A1-1
A2-1
A2-2
B1-1, B1-2
B2-1~B2-6
B3-1
B4-1, B4-2
C1-1, C1-2
C2-1
C3-1, C3-2
C4-1
D1-1
D1-2
D1-3
D2-1, D2-2
D2-2, D2-3
D2-4
D3-1
D3-1~D3-4
D3-5
D3-6
E-1~E-27
F1-1~F1-3
F2-1
F2-2
G-1
H-1
H-2
H-3
H-4
H-5
I-1~I-3
I-4
I-5
I-6
I-7
I-8
I-9
I-10
I-11
I-12
I-13~I-15
I-16
I-17
I-18
I-19
I-20
J-1, J-2
K1-1, K1-2
K1-3
K1-3
K2-1
K2-2
K2-3
K3-1~K3-4

SERVICING NOTICES ON CHECKING
1. KEEP THE NOTICES
2. AVOID AN ELECTRIC SHOCK
As for the places which need special attentions, they are
indicated with the labels or seals on the cabinet, chassis
and parts. Make sure to keep the indications and notices
in the operation manual.
There is a high voltage part inside. Avoid an electric
shock while the electric current is flowing.
3. USE THE DESIGNATED PARTS
The parts in this equipment have the specific
characters of incombustibility and withstand voltage for
safety. Therefore, the part which is replaced should be
used the part which has the same character.
Especially as to the important parts for safety which is
indicated in the circuit diagram or the table of parts as
a mark, the designated parts must be used.
6. AVOID AN X-RAY
Safety is secured against an X-ray by considering about
the cathode-ray tube and the high voltage
peripheral circuit, etc.
Therefore, when repairing the high voltage peripheral
circuit, use the designated parts and make sure not
modify the circuit.
Repairing except indicates causes rising of high
voltage, and it emits an X-ray from the cathode-ray tube.
4. PUT PARTS AND WIRES IN THE ORIGINAL
POSITION AFTER ASSEMBLING OR WIRING
There are parts which use the insulation material such
as a tube or tape for safety, or which are assembled in
the condition that these do not contact with the printed
board. The inside wiring is designed not to get closer to
the pyrogenic parts and high voltage parts. Therefore,
put these parts in the original positions.
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
In the condition that an explosion-proof cathode-ray
tube is set in this equipment, safety is secured against
implosion. However, when removing it or serving from
backward, it is dangerous to give a shock. Take
enough care to deal with it.
PERFORM A SAFETY CHECK AFTER
SERVICING
7.
Confirm that the screws, parts and wiring which were
removed in order to service are put in the original
positions, or whether there are the
portions which are deteriorated around the serviced
places serviced or not. Check the insulation between the
antenna terminal or external metal and the AC cord plug
blades. And be sure the safety of that.
(INSULATION CHECK PROCEDURE)
1.
2.
3.
4.
Unplug the plug from the AC outlet.
Remove the antenna terminal on TV and turn on the
TV.
Insulation resistance between the cord plug terminals
and the eternal exposure metal [Note 2] should be
more than 1M ohm by using the 500V insulation resis-
tance meter [Note 1].
If the insulation resistance is less than 1M ohm, the
inspection repair should be required.
[Note 1]
If you have not the 500V insulation resistance meter,
use a Tester.
[Note 2]
External exposure metal: Antenna terminal
Earphone jack
A2-1

1.
2.
3.
4.
5.
Remove the VCR block from the main unit.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
Remove the screw 1of the Deck Chassis and remove the Loading Motor.
Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape.
Rotate the Clutch Ass'y either of the derections to wind the Video Tape in the Cassette Case.
Repeat the above step 3~4. Then take out the Video Cassette from the Deck Chassis. Be careful not to
scratch on the tape.
TAPE REMOVAL METHOD AT NO POWER SUPPLY
Pinch Roller Cam
Main Cam Clutch Ass'y
Main Chassis (Front Side)
Loading Motor
Screw 1
Capstan DD Unit
A2-2

B1-1
1
Main PWB Holder
VCR Block
Main PWB
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS
AND P.W. Boards
1-4: MAIN PWB (Refer to Fig. 1-4)
1.
2.
3.
4.
5.
6.
7.
8.
Remove the screw 1.
Remove the Main PWB Holder.
Remove the screw 2.
Remove the TV PWB Holder.
Remove the 2 screws 3.
Remove the 3 screws 4.
Disconnect the following connectors:
(CP403, CP810 and CP820).
Remove the Main PWB in the direction of arrow.
Fig. 1-4
1-2: CRT PWB (Refer to Fig. 1-2)
CAUTION: BEFORE REMOVING THE ANODE CAP,
DISCHARGE ELECTRICITY BECAUSE IT
CONTAINS HIGH VOLTAGE.
BEFORE ATTEMPTING TO REMOVE OR
REPAIR ANY PWB, UNPLUG THE POWER
CORD FROM THE AC SOURCE.
1.
2.
3.
Remove the Anode Cap.
(Refer to REMOVAL OF ANODE CAP)
Disconnect the following connectors:
(CP802 and CP850).
Remove the CRT PWB in the direction of arrow.
Fig. 1-2
Front Cabinet
1-3: TV/VCR BLOCK (Refer to Fig. 1-3)
1.
2.
3.
4.
Remove the 2 screws 1.
Disconnect the following connectors:
(CP353, CP401, CP501 and CP502).
Unlock the support 2.
Remove the TV/VCR Block in the direction of arrow.
Fig. 1-3
Front Cabinet
UP TO
RELEASE
CRT PWB
TV/VCR Block
2
1
1
34
3
44
2
TV PWB Holder
1-1: BACK CABINET (Refer to Fig. 1-1)
1.
2.
3.
4.
Remove the 6 screws 1.
Remove the 2 screws 2which are used for holding the
Back Cabinet.
Remove the AC cord from the AC cord hook 3.
Remove the Back Cabinet in the direction of arrow.
Fig. 1-1
Front Cabinet
1
1
2
2
1
1Back Cabinet
1
1
3