Intrepid Video &
Electronics
| Be notified of page updates |
| powered by ChangeDetection |
Please note I plan on adding more pages and separating TV help, from VCR help, and so on. Tips will be added to my site. There are unlimited possibilities. This is strictly voluntary, on my part. Please visit the links, I have, and register where appropriate.
Click on a link to download or view the information.
Most files require WinZip to open. Some require Adobe Acrobat to view.
Click here to download free WinZip--Click here to download Acrobat viewer
HOME--About Us--Technician's page--Email--The funnies
More repair manuals (monitors)nControl! ® Service Management Software
Click here for information on joining the tech email list
Need help on troubleshooting that TV? Click here for helpful information and downloads
The following are tips from Clint Hamilton that he has saved in email format (Outlook express). Click on his name for great prices on computer equipment, peripherals and more.
They are zip files that list the fixes for various TV's and VCR's. These are not in any order, but feel free to download them and save them in a format that you can organize them.
----TIPS2------TIPS3--------TIPS4-----TIPS5
From Bil Green, subbing unlisted transistors
Bil has put together a list of generic subs for 300 ECG transistors and diodes. These subs are exactly the same, not just similar. Save hundreds of dollars using the generic equivalent. Keep checking here as I get more information.
Horizontal output circuit testing, special "universal" subs, super easy diode subbing, make a darlington and more. (Price to be determined soon!)
View the layout of the top and bottom deck of many VCR's, also order parts for some units.
More VCR lay-outs from DIY VCR parts
Actual pictures of the top and bottom of VCR's. Order VCR parts from this site.
Elmswood Guernsey electronics repair database
Search for tips, enter your own tips. Database includes tips for TV's, VCR's, microwaves, answering machines, computers and more.
For help on Microwave oven repair, feel free to email don at fixitusanh.com
Date: Thu, 14 Oct 1999
15:27:10 -0400
From: "Dwight's TV" <dwightstv at simflex.com>
Subject: Microwave Repairs
Hi All,
I saw some microwave repair tips so I thought I'd
mention a couple of tests that only take a few seconds
and are very informative.
Draw your own conclusions from the test results.
Run microwave for 5 seconds. Unplug AC and Immediately
short the HV cap. Looking for good POP. (normal)
While running the microwave, hold a screwdriver very close
to the HV transformer metal core ( not the windings). You can
feel
the 60 hz vibration through the screwdriver.
Sometimes it is quite strong. You can feel
when defrost cuts on and off.
Jim
TOP
SYMPTOM
WHEN A PROBLEM OCCURS RELATING TO CASSETTE LOADING/
UNLOADING, CAM MOTOR ROTATION, DURM ROTATION OR REEL ROTA-
TION, AN EMERGENCY CODE IS SHOWN IN THE H:M:S FLUORESCENT
DISPLAY.
SOLUTION
THE EMERGENCY CODE IS SHOWN IN THE SECONDS COLUMN AND SHOULD
BE READ AS FOLLOWS:
00 NORMAL
01 ABNORMAL T REEL ROTATION
02 ABNORMAL S REEL ROTATION
03 ABNORMAL DRUM ROTATION
04 ABNORMAL FOWARD CAM MOTOR ROTATION
05 ABNORMAL REVERSE CAM MOTOR ROTATION
06 ABNORMAL CASSETTE LOADING
07 ABNORMAL CASSETTE UNLOADING
THESE CODES ARE CLEARED WHEN AC IS REMOVED OR WHEN ANOTHER
FUNCTION BUTTON IS PUSHED.
Thanks to Ponderd at aol.com
TOP
Here is the list of
models and modification kits
V-10 CM-KIT V-11 B-1 KIT V-12 P-2
KIT
VS-4001R VS-4007R VS-4517S
VS-4003R VS-4506R VS-5016R
VS-4501R VS-4507R VS-5017S
VS-4502R VS-5005R VS-50VF1
VS-4503R VS-5006R VS-50VF2
VS-5001R VS-5007R VS-50VX2
VS-5002R VS-5021R VS-50VX3
VS-5003R VS-50VX1 VS-6017R
VS-5004R VS-6004R VS-6026R
VS-5010R VS-6021R VS-60VF2
VS-5020R VS-7004R VS-60VX2
VS-6002R VS-60VX3
VS-6015R VS-7017R
VS-7001R VS-70VF2
The reason for the modification kits is to prevent burn lines in
the
crts
Thanks to John Ritchie
MAKE SURE TO GET A COPY
OF THE JAPANESE
TRANSISTOR SPEC AND SUB BOOKS! There are
also a few good web sites with specs. Hundreds of
American and Japanese semiconductors.
http://www.semicon.toshiba.co.jp/seek/us/td/99kataban/20016.htm
http://members.tripod.com/~Malzev/comp/transist.htm
http://www-eu2.semiconductors.com/search/
http://www.donberg.ie/warehs/group14.htm
http://www.tvaudio.co.za/transistors/transistors_01.htm
Thanks for the info Bil Green
VCR MODELS COVERED BY YEAR 2000
EXCHANGE PROGRAM
EFFECTIVE
SVB106AT
VPB115AT
VCB411AT*
VCB611AT*
VRB411AT
VRB413AT
VRB461AT
VRB611AT
VRB612AT
VRB613AT
VRB614AT
VRB615AT
VRB661AT
VRB664AT
VRB665AT
VR201BMG
VR400BMG
VR401BMG
VR600BMG
VR601BMG
VR602BMG
VR660BPH
VR810BPH
VR960BPH
VR1010BP
Modification for RCA PTV HV Block
On the old HV Block, cut
the 2 ground wires, leaving sufficient length from the
connector end so these wires can be spliced onto the ends of the
ground wires on the
new HV Block. On the New HV Block, cut the 2 ground wires
near the 4-pin connector
and discard the connector. Strip down the insulation,
noticing that one of the
wires has a shielding. This shielded cable (both the
shielded wire and the
shielding) should be spliced to one of the wires with the ground
connectors at the
end (that was removed from old HV Block) for connecting to ground
in the PTV. The
other single wire should be spliced to the other wire with the
ground connector at
the end (that was removed form the old HV Block) for connecting
to the other ground
in the PTV. Both of these grounds are connected to the same
ground on this model
PTV. For Splicing, it is best to use heat shrink tubing
over a soldered connection. The ¼ turn twist-lock
connector leading from the flyback will have to be screwed
onto the single input of the new HV Block until electrical
connection is made
internally. This twist-lock connector usually splits apart
but if you hold it
firmly in place and wrap a small tie-wrap around it, tightening
the tie-wrap should
hold it firmly in place. The new HV Block has a spring-loaded
connection down
inside that needs slight pressure to hold the connection together.
The 3 high voltage outputs to the CRTs use the same screw-type
connectors on the new
HV Block. The 2 mounting screws should mount the same as
the old HV Block. I have used this method for many RCA and
Hitachi PTVs and all have been successful.
Thanks to Robert Ford
Fast check for Sony power supplies.KV27TS36
This is a fast check for
Sony power supplies. The important thing to
remember about these supplies is that it is a push pull amplifier.
The load
across the 2 transistors must be close to equal or it will self-destruct.
The frequency is the regulating part of the equation. They
are designed to
start at a high frequency out of resonance and be pulled lower by
the
regulator toward resonant frequency to achieve proper regulation.
The supply
will oscillate at very low voltages and this is the only way to
check them
out.
After doing the usual repair of transistors and I generally
include the
damper diodes (you can use Sony parts but they are subbing to a 1N5401).
If
you don't know why the supply blew up, check the Horizontal
output and look
for rings around the driver transformer.
First pull the relay RY602. This will prevent the set from
trying to power
up during repair and testing.
Monitor the voltage at Q601 collector or R607 is just as good.
Scope Q602 collector for waveform and DC voltage. Lower
the AC voltage to 20 volts DC. The supply should be
oscillating and
each transistor should be dropping 10 volts. If that looks
good run the DC
up to 40 Volts.
At about 80 volts DC the current drawn by the supply should peek
and start
to decline with further increase in voltage. You should
also have a nice
square wave of equal duty time with no peeks or ringing.
Each transistor
should be dropping 40 volts. You may see a slight bounce
in the supply frequency at this time. The
standby is up enough to turn the micro on and the slow start
circuit is
trying to bring the run supplies up to full value. Of
course this won't
happen with the relay still out. I continue to increase
the DC stopping at 150 volts and 200 volts. These
are nice round numbers that are easy to work with. If
everything is looking
OK then run the supply on up to full value. You should have
16 volts on
D619 reference to cold ground. The supply is now running
at full voltage. If you have fixed all problems
on the secondary side you can reinstall the relay and tune for
minimum
smoke.
Thanks to Daniel Mundy
1. STAND-BY, MUTE, 1, 8,
2, POWER ON
2. "FACTORY MODE" message will be displayed. The
Factory Mode has five
components: Adjustment, MPX adjust, test Pattern, Set Option
Byte, and
Factory Reset.
3. Access the Adjustment Mode be pressing the "VOLUME"
keys (<,>).
The adjustment parameters are listed in the table.
Select them by pressing the CHANNEL keys (^, v).
4. After completing the Factory Mode adjustments, turn the power
off.
1. Press menu on the
remote
2. Select option 7
3. Select option 1
4. Highlight "setup" & press menu
5. Press "go back" or "prev chan"
6. Press "input" or "who"
7. Press "clear" to exit
8.Unit must be setup again, and allowed to obtain complete
download
With the set off.
Display
5
Vol up
Power
Mute and enter to write new data.
Error Codes:
0 =No error
1 =X-ray/overvoltage protection
2 =High beam current(BCI)protection
3 =Vertical protection
4 =I2C error while communicating w/snd processor(IC7833
5 =Signal processor (IC7250)start-up error
6 =I2C error while communicating w/sig processor(IC7250)
7 =General I2C error*
8 =Internal RAM error micro controller
9 =EEPROM configuration error(Checksum error)
10=I2C error,EEPROM
11=I2C error, PLL Tnr
*General error means: no I2C device is responding to
the particular bus.
Possible causes: SCL or SDA sht to gnd, SCL sht to SDA, SCL or
SDA open at
(IC7600).
