JVC AV-28X5BU, Service Manual

Page: 4 / 68

1-4 (No.YA262)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
ZOOM
This function can change the screen size according to the
picture aspect ratio.
PICTURE MODE
This function can adjust the picture settings automatically.
3D CINEMA SOUND
You can enjoy sounds with a wider ambience.
MOVIE THEATRE
This function displays a cinema film picture more smoothly and
naturally on the screen.
DIGITAL VNR
This function cuts down the amount of noise in the original
picture.
DigiPure Pro
This function uses the latest in digital technology to give you a
natural-looking picture.
2.2 MAIN DIFFERENCE LIST
2.3 21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2/EXT-3
(P-P= Peak to Peak, B-W= Blanking to white peak)
Item AV-28X5BU AV-28X5SU AV-32X5BU AV-32X5SU
CABINET COLOUR Black Silver Black Silver
MAIN PWB SML-1352A-U2
←
SML-1351A-U2
←
POWER & DEF PWB SML-2352A-U2
←
SML-2351A-U2
←
CRT SOCKET PWB SML-3302A-U2
←
SML-3303A-U2
←
Pin No. Signal designation Matching value EXT-1 EXT-2 EXT-3
1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) Not used
2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) Used (R3)
3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) Not used
4 AUDIO GND Used Used Used
5 GND (B) Used Used Used
6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2) Used (L3)
7 B input 700mV
(B-W)
, 75
Ω
Used Used Not used
8
FUNCTION SW
(SLOW SW)
Low : 0V-3V
High : 8V-12V, High impedance
Used Used Used
9 GND (G) Used Used Used
10 SCL / T-V LINK Not used
Used
(SCL2 / TV-LINK)
Not used
11 G input 700mV
(B-W)
, 75
Ω
Used Used Not used
12 SDA Not used Used (SDA2) Not used
13 GND (R) Used Used Used
14 GND (YS) Used Not used Not used
15 R / C input
R : 700mV
(B-W)
, 75
Ω
C : 300mV
(P-P)
, 75
Ω
Used (R) Used (C2/R) Used (C3)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75
Ω
Used Used Not used
17 GND (VIDEO output) Used Used Used
18 GND (VIDEO input) Used Used Used
19 VIDEO output 1V
(P-P)
(Negative sync), 75
Ω
Used (TV OUT) Used (LINE OUT) Not used
20 VIDEO / Y input 1V
(P-P)
(Negative sync), 75
Ω
Used Used Used
21 COMMON GND Used Used Used
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
[Pin assignment]