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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.
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Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
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I got your link from a friend and I must say that I am really satisfied with your service. Specially this B&O manual I didn't find anywhere on the web... but you could deliver it :-) . You deliver very fast and the copy is of good quality. So your webpage is bookmarked. Thanks
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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
I will use Owner-Manual.com for all my manual needs.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
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Service Modes, Error Messages, and Repair Tips
5.5.2 General Problems � TV switched �off� or changed channel without any user action Set switches off after �TV SWITCHING OFF� was displayed. �Auto Standby� switched the set �off� because: � There was no ident signal for more than 15 minutes. � There was no remote control signal received or local key pressed for > 2 hours. See chapter 8 for a description on the options to enable/disable �Auto Standby�. 5.5.3 Picture problems Picture too dark or too bright � Press �Smart Picture� button on the remote control. In case the picture improves, increase / decrease the brightness value or increase / decrease the contrast value. The new �Personal Preference� value is automatically stored after 3 minutes. � After switching on the Customer Service Mode the picture is OK. Increase / decrease the brightness value or increase / decrease the contrast value. The new �Personal Preference� value is automatically stored after 3 minutes. Snowy picture Check the �NOT TUNED� section of the Customer Service Mode screen. Snowy picture and/or unstable picture A scrambled or decoded signal is received. Black and white picture � Press �Smart Picture� button on the remote control. In case picture improves, increase the colour value. The new �Personal Preference� value is automatically stored after 3 minutes. � After switching on the Customer Service Mode the picture is OK. Increase the colour value. The new �Personal Preference� value is automatically stored after 3 minutes. Menu text not sharp enough � Press �Smart Picture� button on the remote control. In case the picture improves, decrease the contrast value. The new �Personal Preference� value is automatically stored after 3 minutes. � After switching on the Customer Service Mode the picture is OK. Decrease the contrast value. The new �Personal Preference� value is automatically stored after 3 minutes. 5.5.4 Sound problems No sound or sound too loud (after channel change / switching on) After switching on the Customer Service Mode the volume is OK. Increase / decrease the volume level. The new �Personal Preference� value is automatically stored after 3 minutes. 5.5.5 Extra information/tips: � Complaints that may be caused by an incorrect system setting: � No colours � Colours not correct � Unstable picture � Noise in picture To change the system setting of a preset: 1. Press the �MENU� button on the remote control 2. Select the INSTALL sub menu 3. Select the MANUAL STORE sub menu 4. Select and change the SYSTEM setting until picture and sound are correct
LC03E
5.
EN 23
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5. Select the STORE menu item When the set is in PC mode and there is no VGA signal present at PC-in connector, the set will shutdown to standby in couple of seconds after showing �NO VIDEO INPUT�. This is a normal behaviour of the set to safe power. The Scaler is the driving engine of the LCD panel. When there is no display and OSD on screen, check whether sound is producible on TV channel. If sound is audible, most likely the defective lies in Scaler board or inverter board. To know fast whether inverter is functioning, visually check if the backlights are �on� by looking at the back of the LCD panel. Some bright spots can be seen on the side. Other way to tell whether the backlight is working is to switch the set to AV mode. The front of the screen had some kind of �fogged� effect. Note: when one of the backlight connectors has loosened, the inverter circuit will be shut down. If the supply to the LCD panel is OK (likewise for backlight supply), but no data signals (example: signals on connector 1506) supplied from Scaler to LCD panel, you will notice that the LCD screen will shown full screen in sequential of BLUE, GREEN, RED, BLANK, dark-GREY, light-GREY and WHITE repeatedly. It means LCD panel is in good condition. The fault lies in the Scaler board
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