Read Sony CPD-G420 (serv.man4) Service Manual online
— 16 —
CPD-G420
4-2. PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM INFORMATION
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or less
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise speciÞ ed.
All resistors are in ohms. k
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise speciÞ ed.
All resistors are in ohms. k
Ω
=1000
Ω
, M
Ω
=1000k
Ω
Indication of resistance, which does not have one for rating electrical
power, is as follows:
power, is as follows:
Pitch : 5mm
Rating
electrical
power
:
1
/
4
W
1
/
4
W in resistance,
1
/
10
W and
1
/
8
W in chip resistance.
: nonß ammable resistor.
: fusible resistor.
: internal component.
: panel designation and adjustment for repair.
: earth ground
: earth-chassis
: earth-chassis
All variable and adjustable resistors have characteristic curve B, unless
otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M
otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M
Ω
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.
S : Measurement impossibillity.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibillity.
: B+line.
: B-line (Actual measured value may be different).
: signal path (RF).
4-1. CIRCUIT BOARDS LOCATION
The components identiÞ ed by shading and
!
symbol are critical for safety. Replace
only with part number speciÞ ed.
The symbol
indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
Les composants identiÞ es per un trame et une marque
!
sont critiques pour la
securite. Ne les remplacer que par une piece portant le numero speciÞ e.
Le symbole
indique une fusible a action rapide. Doit etre remplace par une
fusible de meme yaleur, comme maque.
Circled numbers are waveform references.
The components identiÞ ed by X in this basic schematic diagram
have been carefully factory-selected for each set in order to
satisfy regulations regarding X-ray radiation. Should replacement be
necessary, replace only with the value originally used.
have been carefully factory-selected for each set in order to
satisfy regulations regarding X-ray radiation. Should replacement be
necessary, replace only with the value originally used.
When replacing components identiÞ ed by Y, make the necessary
adjustments as indicated. If the results do not meet the speciÞ ed
value, change the component identiÞ ed by X and repeat the
adjustment until the speciÞ ed value is achieved.
(Refer to Section 2: Safety Releated Adjustments.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.
adjustments as indicated. If the results do not meet the speciÞ ed
value, change the component identiÞ ed by X and repeat the
adjustment until the speciÞ ed value is achieved.
(Refer to Section 2: Safety Releated Adjustments.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.
Part Replaced ( )
HV ADJ
RV901
Part Replaced ( )
D Board C925, IC901, R901, R902, R905,
R924, R925, R926, RV901,
T901 (FBT),
• Mounted D Board
T901 (FBT),
• Mounted D Board
HV Regulator
Circuit Check
Circuit Check
D Board
C920, C923, D911, D912, R903,
R917, R918, R919, R920, R923,
T901 (FBT)
• Mounted D Board
R917, R918, R919, R920, R923,
T901 (FBT)
• Mounted D Board
N Board
IC1001, RB1001
• Mounted N Board
• Mounted N Board
N Board
IC1001, RB1001
• Mounted N Board
• Mounted N Board
HV HOLD
DOWN
Circuit Check
DOWN
Circuit Check
D Board
C930, D917, R921, R932, R933,
R935, T901 (FBT)
• Mounted D Board
R935, T901 (FBT)
• Mounted D Board
Beam Current
Protector
Circuit Check
Protector
Circuit Check
REFERENCE INFORMATION
RESISTOR
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
:
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
:
ADJUSTMENT RESISTOR
COIL
: LF-8L MICRO INDUCTOR
CAPACITOR
: LF-8L MICRO INDUCTOR
CAPACITOR
SECTION 4: DIAGRAMS
: TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
A1
N
US
H1
D
DA
Click on the first or last page to see other CPD-G420 (serv.man4) service manuals if exist.