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This is exactly the service manual I needed.
Complete with all schematics, partslists, PCB layouts and alignment instructions.
This manual covers both the T-4970 en T-488F Onkyo tuner.
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IF PRINTED CIRQUIT BOARD WIRING VIEW WAS ONE TONE LIGHTER, THEN 5 STAR RANK HAS TO BE MY CHOISE.
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Very usefull, good quality drawings !
Muito útil encontrei todas as informações necessárias.
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Wanting to repair a neighbours tape recorder I needed the necessary information, it makes it easier. Although the service manual is described as "Language : English" To my dismay I found that it is entirely written in German, a language I do not understand. At least I now have the schematics which will help of sorts. I may not use this service again due to the laguage difficulty after all when it states English you do not expect it to be entirely in another language.
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GOOD SERVICE MANUAL.I ALWAYS BUY THERE IF I FIND WHAT I AM LOKING
1-4. Function of Internal Switch
1-4. Function of Internal Switch
AT-88 board � S201 (MIC LEVEL 1 0 dBu/-20 dBu) � S301 (MIC LEVEL 2 0 dBu/-20 dBu) Used to set the output level at the MIC OUT CH1/CH2 connector to �0 dBu� or �-20 dBu�. Factory-setting is �0 dBu�. (0 dBu=0.775 Vrms) � S1001 (CCU No.) This switch is mainly used for the CCU number setting. The CCU number of 1 to 96 can be set in binary coded decimal (BCD) using the switches 1 to 8 of S1001. The switches 1 to 4 determine the number of units and 5 to 8 determine the number of tens. For each digit, the number of 0 to f can be assigned. The numbers a to f, however, become invalid. (Example)
OFF ON
1 2 3 4 5 6 7 8
Units
0
Tens
5
1 2 3 4 5 6 7 8
1
6
1 2 3 4 5 6 7 8
2
7
1 2 3 4 5 6 7 8
3
8
1 2 3 4 5 6 7 8
4
� S1002-4 This switch selects the way to control the PIX 1/2 and WF 1/2 connectors. ON : MSU or RCP controls PIX 1 and PIX 2, WF 1 and WF 2 simultaneously. OFF : RCP controls PIX1 and WF 1, MSU controls PIX 2 and WF 2. It is recommended to turn on when either MSU or RCP is connected to CCU. Factory-setting is �OFF�. � S1002-5 (CHARACTER OFF SELECT) When the CHARACTER button on the RCP control panel is turned off (the lamp goes out), S1002-5 selects whether an error message is displayed in the auto setup and diagnosis modes, or not. OFF : Normal mode (A message is displayed only when an error occurs.) ON : No message is displayed Factory-setting is �OFF�. � S1002-6 (CB CHARACTER SELECT) This switch selects a character signal to be added to the color bars signal output from the CCU. ON : Standard character signal (SONY logotype) OFF : Special character signal set by a user (Displayed with S1002-7 set to �ON�.) Factory-setting is �OFF�. � S1002-7 (SPECIAL CHARACTER ON/OFF) When this switch is set to �ON�, a special character signal, set by a user, is added to the color bars signal to be output from the CCU. To output the signal, press the BARS button on the MSU control panel and turn on the CB CHARA button in the MSU touch panel. Factory-setting is �OFF�. � S1002-8 (CONTROL CLEAR) When this switch is set to �ON�, all analog control data is returned to the center value and switch data is returned to its factory-set value every time the power of CCU is turned off. n � This switch setting is valid only when the CCU number set with S1001 is 96 or less. � When the switches 1 to 8 of S1001 are all set to �ON� with S1002-8 set to �ON�, the data of hour meter stored in the microcomputer on the AT board is reset. � When the switches 2 to 8 of S1001 are set to �ON� with S1002-8 set to �ON�, the special character signal, set by a user is deleted. Factory-setting is �OFF�.
9
CCU No.
50
61
72
83
94
The switches 1 to 8 of S1001 are factory-set to �OFF� (00). � S1002-1 Not used. Always set to �OFF�. � S1002-2 When no reference signal is input to CCU, alarm indicator is lit or alarm message is displayed on MSU, RCP or CNU normally. This switch selects whether the alarm indication is performed with no reference signal input, or not. With the switch set to ON, the alarm indication is not performed. Factory-setting is �OFF�. � S1002-3 Not used. Always set to �OFF�.
1-12
CCU-700A(UC) CCU-700AP(CE)
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