DOWNLOAD Sony KV-21X1A Service Manual ↓ Size: 922.98 KB | Pages: 40 in PDF or view online for FREE

Model
KV-21X1A
Pages
40
Size
922.98 KB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-21x1a.pdf
Date

Sony KV-21X1A Service Manual ▷ View online

KV-21X1
— 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 so 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.
To check error code it is necessary to use TV error display part number S-188-900-10.
2
4-3. BE-5  SELF  DIAGNOSTIC  SOFTWARE
Table 1
Description
Notes
No. of
Flashes
Error
code
No error.
Jungle nacks IIC bus1 transmisson.
Jungle FAULT (not OK) - flags.
Jungle - No H flyback.
Jungle - Stack overflow.
Sound Processor nacks IIC bus1 transmission.
Protection input: X-ray protection.
Protection error: No V synchro.
NVM nacks IIC bus0 transmission.
Tuner nacks IIC bus1 transmission.
General IIC bus1 error (SDA1 or SCL1 are being held low.)
(2)
(3)
(2)
(4)
(3)
(3)
(1)
(3)
(1)
00
30
31
32
33
40
90
91
10
20
01
-
2
3
4
-
5
6
6
7
8
9
(1) Only reported on mains power up.
(2) Reported on mains power up or exiting standby.
(3) Reported at any time and result in the set reverting to standby mode.
(4) Reported at any time and result in the set reverting to audio mute mode.
Note :
Deflection System Adjustments should not be carried
out whilst using an NTSC (60Hz) signal, or if the
signal is unlocked.
Flash Timing Example : e.g. error number 3
Stby LED
ON
ON
ON
OFF
OFF
— 30 —
KV-21X1
Note :
All capacitors are in 
µ
F unless otherwise noted.  pF:  
µµ
F
50WV or less are not indicated except for electrolytic and
tantalums.
All resistors are in ohms.
k  = 1000  , M  = 1000K
Indication of resistance, which does not have one for rating
electrical power, is as follows.
Pitch : 5 mm
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.
: 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.
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.
Readings are taken with a colour-bar signal input.
Readings are taken with 10M
 digital multimeter.
Voltages are dc with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production
tolerances.
All voltages are in V.
Circled numbers are waveform references.
: B+ bus.
: signal path. (RF)
H2
H3
F1
A
C
H1
Page of 40
Display

Click on the first or last page to see other KV-21X1A service manuals if exist.