Question about Aiwa AV-D97 Receiver

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Front display poising backlight and goes dim.

Front big display of receiver goes dim and so can't read display properly. I believe it's backlight has faded too much. Even though backlight dimmer setting is not set, hardly can see anything on the display, if you come nearer, you can read with little brightness, but from far it's all dark. Can't makeout anything.

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  • 31 Answers

I believe this is most likely due to incorrect voltages at the display. If you have a meter and are familiar with working on electronics, check the voltage at pin 3 of cn501. It should be -28.5. If the voltage is very low, try changing C123 and C124 in the power supply. If the voltage is ok, check R925 and R932, these are both 10 ohm 1/8th watt.

Posted on Dec 13, 2017

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Posted on Jan 02, 2017

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HP DV2500 laptop display is getting very dull display, when we connnect to external monitor display is getting, what may be the problem?


old lap tops have CCFL bulb for backlighting
and all are dim now.
all do !!! first go yellow and dim and dimmer..then out.
by and LED backlite lap top and end this.

Feb 15, 2017 | HP Computers & Internet

1 Answer

2006 Chevy express 2500 instrument panel lights stopped working after two wires touched going to tow switch. No blown fuses


Which I/P lights ? Instrument cluster , radio , HVAC control panel etc.... All the I/P light's are controlled by the BCM - body control module . Do you know about electronic control modules ?
DTC B2610 Passenger Compartment Dimming 1 Circuit
The body control module (BCM) receives a variable voltage signal from the instrument panel (I/P) dimmer switch requesting to illuminate the instrument panel controls illumination lamps to a desired intensity. When this occurs, the BCM directly sends a variable voltage based on the I/P dimmer switch position on the backlight lamps control circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuit.
Voltage for the backlight lamps control circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuits is from the TBC 3 fuse 16 in the underhood fuse block directly through the BCM to these circuits.

• Perform a visual inspection for loose or poor connections at all related components. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
• A short to ground in the following circuits will cause the TBC 3 fuse to open:
- The backlight lamps control
- The instrument panel lamps dimming control
- The LED dimming signal
- Battery positive voltage from the underhood fuse block TBC 3 fuse
• An open in the TBC 3 fuse will cause the BCM to set the following DTC:
- B0951
- B2610
- B2625

DTC B2615 Passenger Compartment Dimming 2 Circuit
DTC B2620 Display Dimming Pulse Width Modulation (PWM) Input Circuit
DTC B2625 Display Dimming Pulse Width Modulation (PWM) Output Circuit
Do you know how to Test for a high resistance, an open, a short to ground, or a short to voltage in the following circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
• 5-volt reference
• The dimming input
• The dimming return

Tow/Haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. When tow/haul mode is selected, the tow/haul switch input signal to the body control module (BCM) is momentarily toggled to zero volts. This signals the powertrain control module (PCM) or transmission control module (TCM) to extend the length of time between upshifts and increase transmission line pressure. Cycling the tow/haul switch again disables tow/haul mode and returns the transmission to a normal shift pattern.

After reading all the pertinent info. to your problem, doing testing ,Checking for DTC'S -diagnostic trouble codes in the BCM , checking power and ground's for the BCM an checking voltage at the tow / haul switch to and from the BCM .is where i would start . Do you know how to do electrical testing ? Read a wire diagram ? If not there are videos on youtube for learning how to do basic automotive electrical testing , how to read wiring diagrams etc... You can find free wiring diagrams at
http://www.bbbind.com/free_tsb.html The only thing with this is you don't have info. saying where componet location's are . This is were factory service info would be helpful

Jan 04, 2017 | Cars & Trucks

1 Answer

Instrument Panel Lights


Daytime headlight issue ? No , no sensor behind the front bumper . No Daytime time head lamp issue , doesn't turn on the instrument panel light's . This is more then likely a remote dimmer module problem .
Interior Lights Dimming Circuit Description (Pontiac)
When the park lights are on, battery positive voltage (B+) is applied via CKT 32 (YEL) to the remote dimmer module. The interior dimming switch in the lamp dimmer switch is a variable resistor which applies the dimming input via CKT 44 (DK GRN) to the remote dimmer module. The potentiometer in the lamp dimmer switch cannot provide enough current in order to operate the incandescent lights. The remote dimmer module amplifies the current, applying a variable voltage to the incandescent lights. As the amount of current increases, the lamps become brighter. As the amount of current decreases, the lamps become dimmer.
The radio, heater and A/C control assembly, instrument cluster, and passenger climate control each has a vacuum fluorescent (VF) display. When each module receives an input that the ignition switch is turned to the RUN position, each module activates the VF display at the full intensity. When the park lights are on, the radio receives the dimming level from an input on CKT 8 (GRY). The radio then relays this information to any other modules with VF displays. All modules with VF displays then adjust the dimming level of their VF display in order to match the level of the incandescent lamps.

May 16, 2017 | 1998 Pontiac Bonneville

3 Answers

My Bose Wave is doing fine except that the brightness of the display in the front goes dim and bright, sometimes flickering. Most of the time it is dim and not readable. I did change out the 9V battery...


Hi.

This is a common problem with this model.

The LCD has a dimmer circuit that can be responsible, in some case it is not the dimmer regulation, but the LCD control circuit itself. In that case you have no LCD backlight and the display is almost unreadable. If that is the problem, changing dimmer settings with procedure below will not help.

Most of the time the problem is dimmer regulation.

About dimmer regulation:

Try disconnecting the unit power cord for ten minutes and connect back.
Try holding down CD or CLOCK button and pressing at the same time the volume buttons. This procedures regulates Bose dimmers setting in a scale from one to 9. The dimmer has separate settings for medium and low brightness. Set both to 5 if you want to disable dimmer settings.

Dec 09, 2010 | Bose Wave Radio

1 Answer

Monitor


You could have a faulty inverter, To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Jun 25, 2009 | Acer Aspire One PC Notebook

2 Answers

My Sony CDX-C680...


Hello greggerika,

It's possible that the "illumination" wire is not connected or connected improperly. It's also possible that the front panel electrical connections are not making proper contact. Remove the front panel and gently clean the contacts with a pencil eraser.

Also, the CDX-C680 allows you to select either green or amber illumination. One or the other may be defective. Try changing it. Press SHIFT - press "3" (set up) three times - press "5" (right arrow) to change the setting. Also check the setting for "dimmer". ON will result in a dimmed display at all times. AUTO will dim the display whenever the headlights are turned on (if the wiring is connected properly). OFF will result in the brightest display at all times.

Hope this helps.

Jun 13, 2009 | Sony Car Audio & Video

2 Answers

Display on Denon AVR-2307 won't work


It may seem obvious, but have you checked the display dimmer settings? Under the front cover is a button marked dimmer. Pressing it cycles through progressive display dimness settings until it goes off. One more press goes back to full brightness.

Dec 30, 2008 | Denon AVR-2807 Receiver

2 Answers

Display on etrex Legend is dim


Have you tried Main Manu / Setup / Display and then adjusting the contrast?

Jul 07, 2008 | Garmin eTrex Legend GPS Receiver

1 Answer

Picture images getting dimmer or fading like no backlights


Hiii...

I'm not quietly sure ...have you check the GK Board looks at B+(135 V) check all 5V regulated..check all High voltage capacitor if there's have low ESR or dry cap...

# send me an e-mail to : be_cek@yahoo.com for compplete copy of the schematic...

Thank's
[Vrya]

Mar 04, 2008 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

Receiver display has disappeared but unit still works


If you are talking about the vacuum display on the front of the receiver, it could be either blown and need replacement or simply dimmed. There is a dimmer button on the front of the unit that should allow you to select between three different brightness settings.

Jan 27, 2008 | Onkyo HT-SR800 System

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