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I was very glad recieving the service manal from You. Additionaly very fast. Extremaly nice servicing. Thanks very mach! Now my GX-220 working better, than it was made. Alexander from Moscow, Russia/
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Sweet! I won the item on eBay and couldn't adjust the geometry or even keep a steady picure. This guide has the full schematics (not available anywhere else as far as I could tell), and was a bargain for the wealth of knowledge it contains. I hooked it up to my testing equipment, tweaked a few potentiometers and got it playing videogames in no time. Thanks!
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It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
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Great Manual! It contains all the wiring schematics and mechanical exploded views that are essential for service and repair. I was surprised I even found this for such an old machine. Only wish I knew of this site many years ago.
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Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
DTR-4.5
Confirmation of protection circuit
1. Confirmation of speaker relay
Confirm that the speaker relays turn ON approximately 5 seconds after the power switch is turned ON. Confirm that the speaker relays turn OFF immediately after the power switch is turned OFF.
2. How to enter Test Mode
1. To enter a test mode (Test 1 to 4), when the unit is turned on, hold down "CD" + "DISPLAY" buttons and then press "STANDBY/ON" button. 2. Press the respective designated buttons and make sure that your target mode starts. Left arrow key Right arrow key
Zone 2
Standby
Mode Test-1 Test-2 Test-3 Test-4
Button to be pressed "DVD" "VIDEO 1" "VIDEO 2" "VIDEO 3"
Message to be shown on the Front display "Test-1-00" "Test-2-00" "TUNER 82" "Test-4-00"
To move to the next step, press the right arrow key. When you enter Test-3, it is necessary to press this button once to see "Test-3-00" is shown. To move to the previous step, press the left arrow key. To exit, press "STANDBY/ON" button.
3.Confirmation of protection circuit
Check of Voltage detection 1. Enter Test-4 mode. 2. Press and release the right arrow key repeatedly until "TEST-4-21" is shown on the Front display. 3. See your unit automatically start to check each channel. During the check, the message on the display is changing as follows: Channel 1st Message 2nd Message FL+ TEST-4-21 Protect OK FR- TEST-4-22 Protect OK C+ TEST-4-23 Protect OK SL- TEST-4-24 Protect OK SR+ TEST-4-25 Protect OK SBL- TEST-4-26 Protect OK SBR+ TEST-4-27 Protect OK When the whole check is completed, "TEST-4-35" is shown. 4. Exit from the test mode. Check of Current detection 1. Enter Test-4 mode. 2. Press and release the right arrow key repeatedly until "TEST-4-35" is shown on the Front display. 3. Connect a 3 ohm hollow resistor to a speaker terminal for each channel and make sure that the speaker relay would not cut off. 4. Connect a 1.5 ohm hollow resistor to a speaker terminal for each channel and make sure that the speaker relay would cut off. 5. Exit from the test mode.
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