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It paid to find this Service Manual, couldn't find it anywhere else. Exactly what I wanted. Received within 24 hours.
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Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
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Excellent printing quality. A complete and very useful manual with all details.
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This is a great site. I placed my order and by the next am it was available for download. Had some problems with some missing copy on some pages. Once I brought the error to the OMC's attention, the issue was resolved. I'll come back again.
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Mi spiace per non poter scrivere in inglese... ma sono veramente soddisfatto del servizio offerto. Grazie..!!
TKR-750
INSTALLATION
3. External Speaker (KES-4)
The TKR-750 has a internal built-in speaker (5W/8�), and the external speaker output from the TEST/SPKR connector (15-pin) on the rear of the radio is 4W/4�. Use external speaker KES-4.
3-1. Connection for the KES-4 With the TKR-750 s When taking the AF output from the TEST/ SPKR connector (15-pin) on the rear of the radio
The following tools are required for changing the connector.
Fig. 4-1
� Extracting tool
The following extracting tool is recommended : Molex Inc. Order No. : 11-03-0002 1. Remove the connector with jumper from the external speaker connector on the rear panel of the radio. (Fig. 41) Note : Save the jumper, which is required when the radio is used without the external speaker. 2. Remove the terminals with the jumper from the connector housing holes number 9 and 12 using the extracting tool.
Removing the jumper lead (Fig. 4-2)
1) Insert the extracting tool (11-03-0002) into the connector while pushing the jumper lead in the direction of (a). 2) Push the extracting tool into collapse the barbs of the crimp terminal. 3) Pull out the lead while continuing to push the extracting tool in the direction (b). 3. Reinsert the terminal with the black and white stripe lead into hole number 12, and the terminal with the black lead into hole number 6. (Fig. 4-3) 4. Attach the connector to the external speaker connector on the radio.
Fig. 4-2
Note :
Relationship between TEST/SPKR connector (15-pin) connection and speaker output. When pins 9 and 12 are shorted : Built-in internal speaker is used. When pins 9 and 12 are open and output is from pins 6 and 12 : KES-4 is used.
Fig. 4-3
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