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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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SECTION 5 TEST MODE
[Test Mode 1] � Step1 (Test mode 1 setting methods) 1. Connect TP445 (CD TEST 1) to the TP444 (GND). 2. Insert external power supply. � Step2 (Operation in the test mode 1) 1. The CD auto adjustment is not performed, but LCD test mode is displayed. Also, ESP is placed in OFF state and it does not turn ON. 2. The sled is operating while the > or . key is pressed. At this time, the spindle and tracking servos turn OFF. 3. The focus search is performed until the focus becomes OK, if the [CD u ] key is pressed. At this time, the spindle and tracking servos turn OFF. Also, when the focus becomes OK, the optical pick-up moves to almost center of 12 cm disc. 4. The spindle and tracking servos turn ON when the [BAND] key is pressed. Also, the mute turns OFF if the data is correct. � Step3 (Resetting of test mode 1) 1. Remove external power supply. 2. Disconnect TP445 (CD TEST 1) and TP444 (GND). [Test Mode 2] � Step1 (Test mode 2 setting methods) 1. Connect TP447 (CD TEST 2) to the TP444 (GND). 2. Insert external power supply. � Step2 (Operation in the test mode 2) 1. The CD auto adjustment is performed. Also, the ESP can be turned ON or OFF. 2. The sled is operating while the > or . key is pressed. At this time, the spindle and tracking servos turn OFF. 3. The focus search is performed until the focus becomes OK, if the [CD u ] key is pressed. At this time, the spindle and tracking servos turn OFF. Also, when the focus becomes OK, the optical pick-up moves to almost center of 12 cm disc. 4. The spindle and tracking servos turn ON when the [BAND] key is pressed. Also, the mute turns OFF if the data is correct. 5. The pickup jumps by one track if > or . key is pressed when the spindle and tracking servos turn ON, or it jumps continuously if the key is kept pressed. Also, if the [PRESET] key is pressed, the following operation is performed. [PRESET 1] 1 track jump [PRESET 2] 4 track jump [PRESET 3] 16 track jump [PRESET 4] 32 track jump [PRESET 5] 256 track check 6. The pickup jumps to the second music and the test mode is released, if [CD u] key is pressed when the spindle and tracking servos turn ON. [Test Mode 3] � Step1 (Test mode 3 setting methods) 1. Connect TP448 (CD TEST 3) to the TP449 (GND). 2. Insert external power supply. � Step2 (Operation in the test mode 3) 1. The same operation as in test mode 2 is performed. However, the LCD test mode is displayed same as in test mode 1.
� 12 �
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