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Good quality, the manual help me to repair the echo/reverb section
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A good service manual with lots of info and a very fair price
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Great value, good scan, just as expected, everything that you need.
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Good scan, great price, but almost the same with the SV260 service manual.
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This PDF is very comprehensive. It includes drawings, parts lists, schematics, pictures, PCB drawings, mechanical layouts, etc. for all three stackable equipment. The scans are good too. Easy to read and no smudges or black lines. I have no complaints. I will make this site my first stop for finding my service manuals.
DTR-7.7 OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066). 2. Exchange amplifier PC board ass'y (NAAF-8678, NAAF-8682).
[Procedure]
<Note> No input signal. Do not check two or more channels at the same time. Do not connect a dummy load to speaker terminals longer than 2 seconds. 1. Press and hold down CD button, then press STANDBY/ON button while the unit is Power ON. " Test - _ " is displayed only for 5 seconds.
Test - _
Blinks
2. Press VIDEO 3 button, while " Test - _ " is displayed. The unit will be in the state of " Test-4-00 ".
Test - 4- 00
3. Repeatedly press TONE + button until " Test-4-35 " is displayed.
Test - 4- 35
4. Connect a dummy load of 3 ohms to the Front L ch speaker terminals. At this time, confirm that the speaker relay is not turned off.
Test - 4- 35
5. Connect a dummy load of 1 ohm to the Front L ch speaker terminals. At this time, confirm that the speaker relay is turned off and " Protect " will bev displayed.
Pr otect
Disconnect the dummy load immediately after checking the display of " Protect ".
Test - 4- 35
6. Check other channels according to the same procedure as 4 and 5. FL FR C SL SR SBL SBR
7. Press STANDBY/ON button. Turn off
Cl ear
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