Sony KV-21R1A Service Manual ▷ View online
KV-21R1
— 21 —
TT -- Mode is available by pressing the Test button twice, O.S.D 'TT --' appears. The functions described below are available
by pressing two digits. To release the 'TT --' mode, press 0 twice, press 'TEST' , press 'TV' or switch the TV into Stand-by mode.
by pressing two digits. To release the 'TT --' mode, press 0 twice, press 'TEST' , press 'TV' or switch the TV into Stand-by mode.
Note : For Test Modes 41 - 51, it is necessary to ensure that
the TV is set to Prog 59.
4-2. TEST MODE 2:
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KV-21R1
— 22 —
1.
Enter into the service mode.
2.
Using the Blue or Green buttons select the Adjust item.
3.
Press the Yellow button to enter the adjustment
submenu.
submenu.
4.
Select and adjust each item in order to obtain the
optimum image.
optimum image.
See Note on page 23
DEFLECTION SYSTEM ADJUSTMENT
V, LINEAR
VERT, AMPL
V, CENTRE
H, CENTRE
AGC ADJUSTMENT
1.
Receive a signal of 63dBuV / 75 ohm terminated via the
tuner socket.
tuner socket.
2.
Measure the voltage at AGC TP.
3.
Adjust TU101 RV to obtain a voltage of 3.0 ± 0.3V.
A
RV102
RV101
IC101
IC301
TU101
L109
AFT
CN804
H.SIZE
23
AGC
AGC TP
B board
- A Board Component Side -
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PAR TILT
PAR AMP
KV-21R1
— 23 —
The identification of errors within the BE-5 chassis is triggered in 1 of 2 ways :- 1: Bus busy or 2: Device failure to respond to
I C. In the event of one of these situations arising the software will first try to release the Bus if busy (Failure to do sn will report with
a continuous flashing LED) and then communicate with each relevant device in turn to establish if a device is faulty.
If a device is found to be faulty the relevant device number will be displayed through the LED by a Series of flashes which must be
counted (See Table 1), Non fatal errors are reported with this method.
I C. In the event of one of these situations arising the software will first try to release the Bus if busy (Failure to do sn will report with
a continuous flashing LED) and then communicate with each relevant device in turn to establish if a device is faulty.
If a device is found to be faulty the relevant device number will be displayed through the LED by a Series of flashes which must be
counted (See Table 1), Non fatal errors are reported with this method.
If a fatal error is found, the set will simply stay in whichever state it was when the error occurred, but if a non fatal error occurs the
set will try to continue to operate.
set will try to continue to operate.
2
4-3. BE-5 SELF DIAGNOSTIC SOFTWARE
Table 1
Meaning
IC301 not acknowledging I C transmission, NVM OK.
IC301 FAULT (Not OK) - flags
IC301 - No H Flyback
IC301 - Stack Overflow.
Overvoltage / Overcurrent Protection (Pin 52) high.
IC002 not acknowledging I C transmission, IC301 OK.
IC002 and IC301 - No I C acknowledgment.
General I C Error (SDA or SCL being held low)
(IC301, IC001, IC002, CN001)
No of Flashes
2
3
4
5
6
7
8
9
2
2
2
2
Note : Deflection System Adjustments should not be carried
out whilst using an NTSC (60Hz) signal, or if the signal
is unlocked.
is unlocked.
Flash Timing Example : e.g. error number 3
Stby LED
ON
ON
ON
OFF
OFF
— 29 —
KV-21R1
Note :
•
All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50WV or less are not indicated except for electrolytic and
tantalums.
tantalums.
•
All resistors are in ohms.
k = 1000 , M = 1000K
k = 1000 , M = 1000K
•
Indication of resistance, which does not have one for rating
electrical power, is as follows.
electrical power, is as follows.
Pitch : 5 mm
Rating electrical power W
Rating electrical power W
•
: nonflammable resistor.
•
: internal component.
•
: panel designation, or adjustment for repair.
•
All variable and adjustable resistors have characteristic curve
B, unless otherwise noted.
B, unless otherwise noted.
•
: earth - ground.
•
: earth - chassis.
•
: no mounted.
5-2. CIRCUIT BOARDS LOCATION
1
4
/
Reference information
RESISTOR
: RN
METAL FILM
: RC
SOLID
: FPRD
NONFLAMMABLE CARBON
: FUSE
NONFLAMMABLE FUSIBLE
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE CEMENT
: RW
NONFLAMMABLE WIREWOUND
:
ADJUSTABLE RESISTOR
COIL
: LF-8L
MICRO INDUCTOR
CAPACITOR
: TA
TANTALUM
: PS
STYROL
: PP
POLYPROPYLENE
: PT
MYLAR
: MPS
METALIZED POLYESTER
: MPP
METALIZED POLYPROPYLENE
: ALB
BIPOLAR
: ALT
HIGH TEMPERATURE
: ALR
HIGH RIPPLE
5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS
Note : The components identified by shading and marked
are critical for safety. Replace only with the
part number specified.
part number specified.
Note : Les composants identifies par une trame et une
marque sont critiques pour la securite.
Ne les remplacer que par une piece portant le
numero specifie.
Ne les remplacer que par une piece portant le
numero specifie.
•
Readings are taken with a colour-bar signal input.
•
Readings are taken with 10M
Ω
digital multimeter.
•
Voltages are dc with respect to ground unless otherwise noted.
•
Voltage variations may be noted due to normal production
tolerances.
tolerances.
•
All voltages are in V.
•
Circled numbers are waveform references.
•
: B+ bus.
•
: signal path. (RF)
A
C
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