|
|
|
Who's Online
There currently are 6043 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
tres bon document
cela a permis de verifier la connection de l'ecran
merci
salutations
;
The manual was of good quality with high resolution schematic diagrams.
;
The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
;
Quality scan, great manual. I solved my problem with this manual.
 ;
The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
1
2
3
4
C
A
R452 C414 SY IN
VCSDA
b-2
Is there a Y signal? Yes C420 SC IN No Diagnose between the BOARD TO BOARD Assy and S. VIDEO Assy.
d-1
Is there a same signal as VCSDA (0 to 3.3 V)? Yes R454 VCSCL No Check the Q451. If Q451 is failure, replace Q451.
b-3
B
d-2
Is there a same signal as VCSCL (0 to 3.3 V)? Yes No Check the Q451. If Q451 is failure, replace Q451.
Is there a C signal? Yes
No
Diagnose between the BOARD TO BOARD Assy and S. VIDEO Assy.
Note: Check is unnecessary because component input does not convert it.
Step 3-5: VIDEO CLK, DATA
IC701 (Pin 48) LLC1
Step 3-3: Reset
CN318 (Pin 2) XVCRST
e A
C
Is there a clock (27 MHz)? Yes IC701 (Pins 2 to 9)
No Check the parts and patterns in the path (IC401). If IC401 is failure, replace IC401.
Is the voltage "H" (5 V)?
No Diagnose between the BOARD TO BOARD Assy and MAIN Assy.
P8 to P15
X'tal
Yes
f
IC401 (Pin 22) Is there the CLK (28.63636MHz) ? Yes
D
XTAL
c
No Check the X401 or IC402. If X401 or IC402 is failure, replace X401 or IC402.
Is there a data?
No Check the parts and patterns in the path. If IC401 is failure, replace IC401.
Yes
Step 3-6: Video Output
IC701 (Pin 35) DACA
Step 3-4: I2C
CN318 (Pin 4) Does a signal output in constant period (0 to 5 V) ? Yes
E
g-1
VCSDA Is there a composite signal? Yes CN316 (Pin 21) No Check the parts and patterns in the path. If IC701 or R731 or R732 or Q731 is failure, replace it. CVBS OUT
A
No Diagnose between the BOARD TO BOARD Assy and MAIN Assy.
a
VCSCL Is there a composite signal? Yes IC701 (Pin 33) DACB No Check the parts and patterns in the path. If Q731 or R733 is failure, replace Q731 or R733. No Diagnose between the BOARD TO BOARD Assy and MAIN Assy.
CN318 (Pin 3)
A
Does a clock output in constant period (0 to 5 V) ? Yes
g-2
Is there a Y signal? Yes No Check the parts and patterns in the path. If IC701 or R741 or R742 or Q741 is failure, replace it.
F
D
112
1 2
VSX-917V-K
3 4
|
|
|
> |
|
