Video will not turn off; "I2C-BUS STOP MODE" error at power up
TV is actually a JVC AV-31BP6 (Chassis A48), but I couldn't find a forum for that model.
When the TV is plugged in, it automatically powers itself up. Without a cable hookup, the screen displays static as expected, but with cable attached the TV powers up to a black screen with the words "I2C-BUS STOP MODE" flashing at the bottom. Pressing the power button clears the text and brings the TV for all intents and purposes to normal functionality (picture is normal, channels change, volume control, menus, etc).
When the power button is pressed either on the remote or from the front control panel, the audio shuts off as well as the channel display text, but the video continues to play. Pressing the power button again causes the screen to flash briefly before sound and channel display text return and the TV again resumes full function. Only removing the power plug will turn off the video.
I have some small experience with TV repair but I'm not sure where to start with this and would greatly appreciate some advice. Is it likely that the I2C MCU is the culprit? Or should I be looking somewhere else? If so, where?
Thanks in advance.
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3,130 Answers
Re:
Nope a very easy problem .. What it is is the relay is stuck on or closed so when you plug in the set the power comes up But the micro hasent told the rest of the set to work yet. So when you hit the power button. its just like you hit the power and it activated the relay and the rest of the set. Now in some rare occasions the driver transistor for the relay was shorted But most of the time its the contacts that weild shut, but you cant just clean them as it will work for a while, but in a month or so you will be in the smame boat. But if you not a tech this repair shouldnt cost you to much because if your not an experienced tech you can not only cause harn to the set but also you yourself BE CAREFULL and take the set to a pro!!!! Good Luck
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Feb 25, 2015 - Uploaded by Awesome Things
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You need to rectify the problem first then replace any part. If you have its service manual, try to daignose the reson of error and locate the problem area.
possible a bad operation panel replace or 672 B
After powering on the machine, the
communication circuit between the
controller and the operation panel is not
opened, or communication with
controller is interrupted after a normal
startup.
Controller stall
Controller board installed incorrectly
Controller board defective
Operation panel connector loose or
defective
690 A GAVD block I2C bus error
An error is detected in the GAVD
communication I2C control register of
the GABIC2.
I2C bus on BICU defective
691 A GAVD FCI block I2C bus error
An error is detected in the FCI
communication I2C control register of
the GABIC2.
I2C bus on BICU defective
692 A CDIC GAVD block I2C bus error
An error is detected in the CDIC
communication I2C control register of
the GABIC2.
I2C bus on BICU defective
700 B ARDF original pick-up malfunction
After the
SC690 - A GAVD block I2C bus error. An error is detected in the GAVD communication I2C control register of the GABIC2. • I2C bus on BICU defective.GAVD IS THE laser controller loacated on the laser unit.
Tv is going into x-ray protection mode. Check power supply voltage, make sure it's not too high. 160v dc across main cap, do not use chassis ground, use cap ground. If too high, something is open. If too low, something is shorted in power supply. Check voltage regulator ic.
if you can find this in your TV options I cut and pasted it from the manual, see the line with Closed caption settings see if yours matches, sorry about the formatting this furm post will not cut and paste properlyeach of the #'s below corosponds to the bold headings.
OptionSetting/Basic2US1/BasicW/Basic+2US2/Core2US3/Basic+2US4
AAVL 1 1 1 1 1 Auto Volume Level via Sound Menu
ACS 0 0 0 1 0 Auto Convergence
AOUT 1 1 1 1 1 Audio Out
APC 1 1 1 1 1 Auto Picture Control
AV3 1 1 1 1 1 Side AV Source
AV5 0 1 1 1 1 (yes this is blank)
BNUM 1 1 1 1 1 Numerics Displayed in Menus
C169 1 1 NA 0 NA Compress 16:9 mode available
CBFL 1 1 1 1 1 Comb Filter Present
CCAP 1 1 1 1 1 Closed Caption
CFMU NA NA 1 1 1 Comb Filter Menu Item
I also found this with the word search but it makes no sense to me sorry...
The HDR2002 has two microprocessors. The Microprocessor, 7001, on the SSB monitors the Keyboard and the Remote sensor during standby. This IC controls the Tuner, Video switching on the SSB, generates the consumer OSD. Pin 5 of 7001 monitors the Keyboard for a voltage change to generate a command. The Front Detect line on Pin 6 monitors the AV inputs on the Side Jack panel. If a problem develops, the Front Detect will go Low, preventing 7001 from receiving any commands. The Power Fail input on Pin 79 goes High if the set looses power while the set is On. Composite Video is fed to Pin 31 for Closed Caption decoding. Horizontal and Vertical sync on Pins 53 and 55 synchronize the OSD and Closed Captions display signals, which are output on Pins 46, 47, and 48. Fast Blanking for the OSD is output on Pin 52 There are three I2C busses on 7001. The Bus on Pins 78, 80, and 97 communicates with the MemoryIC 7012. This IC stores Customer setup information, Option codes, and Error codes. I2C busses, Sand F communicate with the Tuner on the PIP panel, and the ICs on the SSB. The S bus also controlsthe Tuner on the SSM and the Audio and Video switching on the SSM. Data lines on Pins 16 and 17communicate with the Microprocessor on the ACS module.
BTW if you don’t plan on trying this and are going to throw out the TV, I still need a IC convergence board for a 51MP392H/17 TV I'm fixing, I'm willing to pay S/H and buy your IC board that’s not been tampered with. [email protected]
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