Sony VX-14MW1U Manuel utilisateur
SONY Corporation.
Service Manual
TV / VCR Combination
CHASSIS : CP-082S
Model : VX-14MW1U/14MW1E
VX-21MW1U/21MW1E
SPECIFICATIONS
ITEMS MODEL VX-14MW1U/14MW1E REMARK
VX-21MW1U/21MW1E
TV SECTION STANDARD PAL-I/II(UK MODEL),PAL-B/G(CONTINENTAL MODEL)
SCREEN SIZE 14” : A34EAC01X..
21” : A51EAL...X..
MAIN VOLTAGE 220~240V AC,50Hz
POWER STAND BY MODE : BELOW 5 Watts
CONSUMPTION OPERATION MODE : 14”=50Watts, 21”=63Watts
SOUND OUTPUT 1Wmin
SPEAKER 3Watts 8 Ohm
ANTENNA IMPEDANCE 75 Ohm unbalanced input
TUNING SYSTEM FVS(FREQUENCY SYNTHESIS) TUNING
TUNER VHF-L : E2-S10, VHF-H : E5-S39, UHF : S40-E69 (PAL-I=UHF ONLY)
NUMBER OF PROGRAM 100 PROGRAM
AUX. TERMINAL SCART JACK(REAR) , RCA JACK(AV2 FRONT), HEADPHONE JACK
REMOTE CONTROLLER RM-Z5403/04 with 2 “AAA” type batteries
OTHER FEATURE ON SCREEN DISPLAY, SLEEP TIMER, WAKE UP TIMER, FULL AUTO SEARCH,
MANUAL/FINE TUNING,CHILD LOCK, PANEL LOCK, AUTO REPEAT,
PICTURE TYPE SELECTION (LIVE, NORMAL, FAVOURITE), INDEX SEARCH, TV/AV
VIDEO SINGLE SYSTEM PAL colour and CCIR mono chrome signals, 625lines/50fields.
SECTION RECORDING SYSTEM 2HEAD
INPUT 1Vp-p, 75 ohm, unbalanced
OUTPUT 1Vp-p, 75 ohm, unbalanced
SIGNAL TO NOISE RATIO 43dB with NETTETE IMAGE control at center position
HORIZONTAL RESOLUTION 230lines with NETTETE IMAGE control at center position
AUDIO RECORDING SYSTEM LONGITUDINAL TRACK
INPUT -3.8dBm(500m Vrms), more than 47 Kohms, unbalanced
OUTPUT -3.8dBm(500m Vrms), less than 1 Kohms, unbalanced
FREQUENCY RANGE 100Hz to 6KHz
SIGNAL TO NOISE RATIO 30dB(more than)
GENERA TEMPERATRE 5 o C to 35 o C(operating), -20 o C to 60 o C (storage temperature)
FORMAT standard
TAPE WIDTH 12.65mm
TAPE SPEED SP : 23.39mm/sec, LP : 11.70mm/sec
WITH FULLSIZE SP : 240 min, win E-240 video cassette
CASSETTE LP : 480min, win E-240 video cassette
S/M No. : 9-927-470-01
Nov. 2003
-1-
SAFETY INSTRUCTION 2
SPECIFICATION 3
CIRCUIT BLOCK DIAGRAM 4
ALIGNMENT INSTRUCTIONS 5
SERVICE REMOCON DIAGRAM 8
SCHEMATIC DIAGRAM 11
EXPLODED VIEW 13
PRINTED CIRCUIT BOARD 15
COORDINATES OF MAIN PCB
16
SERVICE PARTS LIST22
TECHNICAL SERVICE GUIDE
PART I
PART II
SAFETY INSTRUCTION
-2-
WARNING:BEFORE SERVICING THIS CHASSIS,
READ THE X-RAY RADIATION
PRECAUTION , SAFETY
PRECAUTION AND PRODUCTION
SAFETY NOTICE BELOW.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially
hazardous X-RAY RADIATION. To avoid such
hazards, the high voltage must not exceed the
specified limit
The nominal value of the highvoltage of this
receiver is 23-25KV 14 ), 25~29KV 21 ) at max.
beam current, The high voltage must not,under
any circumstances, exceed 26KV 14 ),
31KV 21 ).
Each time a receiver requires servicing,the high
voltage should be checked.
It is recommended the reading of the high
voltage be recorded as a part of the service
records, It is important to use an accurate and
reliable high voltage meter.
2. The only source of X-RAY radiation in this TV
receiver is the picture tube. For continuous X-
RAY RADIATION protection, the replacement
tube must be exactly the same type tube as
specified in the parts list.
SAFETY PRECAUTION
1. Potentials of high voltage are present when this
receiver is operating. Operation of the receiver
outside the cabinet or with the back board
removed involves a shock hazard from the
receiver.
1) Servicing should not be attempted by anyone
who is not thoroughly familiar with the
precautions necesary when working on high
voltage equipment.
2) Always discharge the picture tube before
handling the tube.The picture tube is highly
evacuated and if broken, glass fragments will be
violently expelled.
2. If any fuse in this TV receiveris blown, replace it
with the FUSE specified in the Replacement
Parts list.
3. When replacing a high wattage resistor metal
oxide film resistor) in circuit board, keep the
resistor 10mm away from circuit board.
4. Keep wires away from high voltage or high
temperature components.
5. This receiver must operate under AC260 volts,
50Hz. NEVER connect to DC supply or any other
power or frequency.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this have
special safety-related characteristics.
These characteristics are often passed unnoticed
by a visual inspection and the X-RAY RADIATION
protection afforded by them cannot necessarily be
obtained by using replacement components rated
for higher voltage, wattage, etc. Replacement parts
which have these special safety characteristics are
identified in this manual and its
supplements, electrical components having such
features are identified by designated symbol on the
parts list.
Before replacing any of these components,read the
parts list in this manual carefully.
The use of substitute replacement parts which do
not have the same safety characteristics as
specified in the parts list may create X-RAY
Radiation.
SPECIFICATION
-3-
ITEMS MODEL VX-14MW1U/14MW1E
REMARK
VX-21MW1U/21MW1E
TV STANDARD PAL-I/II(UK MODEL),PAL-B/G(CONTINENTAL MODEL)
SECTION SCREEN SIZE 14”A34EAC01X..
21”A51EAL...X..
MAIN VOLTAGE 220~240V AC,50Hz
POWER STAND BY MODE BELOW 5 Watts
CONSUMPTION OPERATION MODE 14”=50Watts, 21”=63Watts
SOUND OUTPUT 1Wmin
SPEAKER 3Watts 8 Ohm
ANTENNA IMPEDANCE
75 Ohm unbalanced input
TUNING SYSTEM FVS(FREQUENCY SYNTHESIS) TUNING
TUNER VHF-L E2-S10,
VHF-H E5-S39,
UHF S40-E69 (PAL-1=UHF ONLY)
NUMBER OF PROGRAM
100 PROGRAM
AUX, TERMINAL
SCART JACK(REAR) , RCA JACK(AV2 FRONT), HEADPHONE JACK
REMOTE CONTROLLER
RM-Z5403/04 with 2 AAA type batteries
OTHER FEATURE ON SCREEN DISPLAY, SLEEP TIMER, WAKE UP TIMER
FULL AUTO SEARCH, MANUAL/FINE TUNING
CHILD LOCK, PANEL LOCK, AUTO REPEAT,
PICTURE TYPE SELECTION (LIVE, NORMAL, FAVOURITE),
INDEX SEARCH, TV/AV
VIDEO SINGLE SYSTEM PAL colour and CCIR mono chrome signals, 625lines/50fidlds.
SECTION RECORDING SYSTEM 2 HEAD
INPUT 1Vp-p, 75 ohm, unbalanced
OUTPUT 1Vp-p, 75 ohm, unbalanced
SIGNAL TO NOISE RATIO
43dB with NETTETE IMAGE control at center position
HORIZONTAL RESOLUTION
230lines with NETTETE IMAGE control at center position
AUDIO RECORDING SYSTEM LONGITUDINAL TRACK
INPUT -3.8dBm(500m Vrms), more than 47 Kohms, unbalanced
OUTPUT -3.8dBm(500m Vrms). less than 1 Kohms, unbalanced
FREQUENCY RANGE 100Hz to 6KHz
SIGNAL TO NOISE RATIO
30dB(more than)
GENERA TEMPERATRE 5 C to 35 C(operating)
-20 C to 60 C (storage temperature)
FORMAT standard
TAPE WIDTH 12.65mm
TAPE SPEED SP 23.39mm/sec, LP 11.70mm/sec
WITH FULLSIZE SP 240 min, win E-240 video cassette
CASSETTE LP 480min, win E-240 video cassette
CIRCUIT BLOCK DIAGRAM
4
-5-
ALIGNMENT INSTRUCTIONS
1. MAIN TUNER AGC
1) Set a Pattern Generator with RF level 65 2 dBuV, 210.25 MHz.
2) Connect a OSCILLOSCOPE PROBE to P101 pin #1) , TUNER AGC INPUT).
3) Adjust AGC UP/DOWN KEY the voltage drop about 1V DC over below it s maximum voltage.
2. SUB TUNER AGC
1) Set a pattern Generator with RF level 65 2dBuV, 210.25 MHz
2) Connect a OSCILLOSCOPE PROBE to P101 pin #3)
3) Press the REC-B key two times.
4) Ajust R157 on the MAIN PCB the voltage drop about 1V DC over below it s maximum voltage.
3. SCREEN
1) Apply a COLOR BAR PATTERN SIGNAL.
2) Press the SCREEN KEY.
3) Connect a OSCILLOSCOPE PROBE to P901 CRT CATHODE R,G,B )
4) Adjust the screen volume on FBT such that the highest black level voltage 120V 5Vdc.
* Another methode
1) Press AV Key in condition of AV no signal.
2) Press the SCREEN KEY.
3) Connect a OSCILLOSCOPE PROBE to P901 CRT CATHODE R,G,B )
4) Adjust the screen volume on FBT such that the highest black level voltage 140V 5Vdc.
4. WHITE BALANCE
1) Apply a COLOR BAR PATTERN SIGNAL.
2) Adjust the R,G,B UP/DOWN KEY of the other color which did not appear on the screen to obtain
WHITE.
5. FOCUS
1) Apply a RETMA PATTERN SIGNAL.
2) Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.
6. GEOMETRY
6-1. S-CORRECTION
1) Apply a CROSSHATCH PATTERN SIGNAL.
2) Adjust the S-CORR UP/DOWN KEY obtain the same distance between
horizontal lines.
6-2. VERTICAL SLOPE
1) Apply a RETMA PATTERN SIGNAL.
2) Pressing the V-SLOPE +/- KEY, the lower half of the screen is blanked.
3) Adjust the border line of blanked picture coincident with the center marks of
the patte using the V-SLOPE +/- KEY.
6-3. VERTICAL CENTER
1) Apply a RETMA PATTERN SIGNAL.
2) Adjust the center line of pattern coincident with the mechanical center marks
of the CRT using the V-CENTER +/- KEY.
6-4. VERTICAL SIZE
* The V-CENTER adjustment has to be done in advance.
1) Apply a RETMA PATTERN SIGNAL.
2) Adjust the upperside of the pattern coincident with the mechanical center
marks of the CRT using the V-SIZE +/- KEY.
-6-
ALIGNMENT INSTRUCTIONS
6-5. HORIZONTAL CENTER
1) Apply a RETMA PATTERN SINGNAL.
2) Adjust picture centering with H-CENTER +/- KEY.
7. DECK ADJUSTMENT
7-1. X-POSITION AND P2,P3 ADJUSTMENT
1) Adjust point X-POSITION
Checking point oscilloscope ch1 = H/SW (PY03 #6)
oscilloscope ch2 = PB ENVE (PY03 #4)
Triggering CH1
Measuring Equipment oscilloscope, path jig
Mode PLAYBACK, ATK OFF
Test tape DP-2 (6KHz)
* Adjustment Procedure
1) Connect the PATH JIG to PY03 after Test tape PLAYBACK
2) Insert the DP-2 TAPE. ( Auto playback )
3) Pressing the ATK OFF KEY.
4) Adjust the waveform of PB ENVE to maximum(figure1) using X-position VR.
5) Adjust IN/OUTPUT GUIDE until the exact waveform appear as bellow figure2.
-7-
ALIGNMENT INSTRUCTIONS
7-2. AUTO PG ADJUSTMENT
1) After adjustment of 7-1. Press the REC. button.
2) Eject the Test tape.
7-3. AZIMUTH ADJUSTMENT
1) Adjust point : AZIMUTH SCREW
Checking point : SOUND OUTPUT PY03)
Measuring Equipment : oscilloscope or audio level meter.
Mode : PLAYBACK
Test tape : DP-2 6KHz)
* Adjustment Procedure
1) Connect the measuring equipment to the AUDIO OUTPUT PY03) terminal.
2) After test tape playback, adjust the output level maximally by varing the azimuth screw.
3) Fix the azimuth screw with locking paint.
* If EEPROM I702) has been changed :
- Option data has to be changed and
- all alignment function has to be readjusted.
-8-
SERVICE REMOCON DIAGRAM
1. DIAGRAM
1. DIAGRAM
* To enter the SERVICE MODE
Press NORMAL => AV => SLEEP => CLEAR => POWER buttons in regular sequency within
10seconds using USER REMOCON after setting ST-BY.
-9-
SERVICE REMOCON
2. HOW TO CHEC TV SECTION WITHOUT VCR DEC
If you want to check TV section without DECK mechanism, then please perform in this order.
1) Pull out the power cord.
2) Remove the VCR DECK mechanism.
3) Supply the main power. Main sw on )
4) Wait for about 10 seconds. You can see the light of power LED if the TV is normal.)
5) Turn on the TV using the remocon. You can see the OSD "EMERGENCY" )
6) Check the TV section.
3. Refer to general adjustment
1) S-CORR +/- S-CORRECTION )
Press this button to adjust the same distance between horizontal lines on screen of crosshatch
pattern.
2) V-SLOPE +/- VERTICAL SLOPE )
Press this button to adjust the border line of blanked picture coincident with the center marks of the
pattern.
3) V-CENT +/- VERTICAL CENTER )
Press this button to adjust the center line of the pattern coincident with the mechanical center marks of
the CRT on screen of RETMA pattern.
4) V-SIZE +/- VERTICAL SIZE )
Press this button to adjust the upperside of the pattern coincident with the mechanical center marks
the CRT on screen of RETMA pattern.
5) H-CENT +/- HORIZONTAL CENTER )
Press this button to adjust picture centering with H-center on screen of RETMA pattern.
6) R,G,B +/- WHITE BALANCE )
The screen is become WHITE adjust R,G,B level by this button.
7) ATK OFF Auto tracking off )
Press this button to adjust X-Position adjustment.
Front panel’s LED’s are lighted up if you press this button.
Press the PB button.
ATK OFF : RED, RED)
ATK MIN : BLINK, OFF)
ATK MAX : OFF, BLINK)
ATK ON : BLINK,BLINK)
; LEFT LED = ST-BY, RIGHT LED = REC/T.REC
8) REC
Press this button to adjust AUTO PG.
9) SCREEN
Press this button to adjust the screen volume on FBT.
10) SHIP SHIPPING CONDITIONS )
Press this button to set the SHIPPING CONDITIONS.
11) REC-B Only 2-TUNER Model)
Press this button to adjust SUB TUNER AGC.
Press once : picture is displayed colour pattern.
Press once more : picture is displayed black/white pattern.
12) AGC +/-
this button to adjust MAIN TUNER AGC.
Ce manuel convient aux modèles suivants
4
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