Specific Service Instructions - JVC LT-26C31BJE Service Manual

2.1 FEATURES
2.1.1 FUNCTION / CIRCUITS
• DIST (Digital Image Scaling Technology) employs an interpolation
method that doubles the scanning lines to realize 1250-line flicker-
free picture making it especially suitable for reproducing high-
resolution pictures even on large-screen displays.
• New chassis design enable use of an interactive on screen
control.
• The TELETEXT SYSTEM has a built-in FASTEXT (UK
system), TOP (German system) and WST (world standard
system) system.
• Because this TV unit corresponds to multiplex broadcast,
users can enjoy music programs and sporting events with live
realism. In addition, BILINGUAL programs can be heard in
their original language.
• Users can make VCR dubbing of picture and sound by
controlling the AV selector to select an optional source at the
EXT-2 output shown in figure.
2.1.2 21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2
Pin No. Signal designation
1 AUDIO R output
2 AUDIO R input
3 AUDIO L output
4 AUDIO GND
5 GND (B)
6 AUDIO L input
7 B input
8 FUNCTION SW
(SLOW SW)
9 GND (G)
10 SCL / T-V LINK
11 G input
12 SDA
13 GND (R)
14 GND (YS)
15 R / C input
16 Ys input (FAST SW)
17 GND (VIDEO output)
18 GND (VIDEO input)
19 VIDEO output
20 VIDEO / Y input
21 COMMON GND
(P-P= Peak to Peak, B-W= Blanking to white peak)
SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

Matching value
500mV(rms) (Nominal), Low impedance
500mV(rms) (Nominal), High impedance
500mV(rms) (Nominal), Low impedance
500mV(rms) (Nominal), High impedance
700mV , 75Ω
(B-W)
Low : 0V-3V
High : 8V-12V, High impedance
700mV , 75Ω
(B-W)
R : 700mV , 75Ω
(B-W)
C : 300mV , 75Ω
(P-P)
Low : 0V-0.4V, High : 1V-3V, 75Ω
1V (Negative sync), 75Ω
(P-P)
1V (Negative sync), 75Ω
(P-P)
[Pin assignment]
20 18 16 14
21 19 17 15 13 11
TV EXT-1
EXT-1
Used (TV OUT)
Used (R1)
Used (TV OUT)
Used
Used
Used (L1)
Used
Used
Used
Not used
Used
Not used
Used
Used
Used (R)
Used
Used
Used
Used (TV OUT)
Used
Used
12 10 8 6 4 2
9 7 5 3 1
EXT-3 EXT-4
EXT-2
EXT-2
Used (LINE OUT)
Used (R2)
Used (LINE OUT)
Used
Used
Used (L2)
Used
Used
Used
Used
(SCL2 / TV-LINK)
Used
Used (SDA2)
Used
Not used
Used (C2/R)
Used
Used
Used
Used (LINE OUT)
Used
Used
(No.YA014)1-7