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Well.. I'd searched for this manual and although I found many copies online I was pleased to find your website with a well balanced pricing system and easy to search and follow links. That together with the very quick response time was just what I was looking for.. being a very impatient tech.. ;-) I had the service manual in front of me within a short time.
Bookmarked.. and you can bet I will always come here first for my service & user manuals..
best regards
Ed(Tony) Foley
G7WHK
;
I will definitely be back for more information when I need it.
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The service manual when downloaded and printed out was clear and easy to read. I would have liked to have been able to enlarge some details, but this was not possible as the file permissions did not allow this. The service was very good. The time taken from placing my order to downloading the document was only a few minutes.
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The manual is useful for trouble shooting for an old instrument. It saved money,and let me enjoy DIY.
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Perfect source of information for replacing the HDD and performing general diagnostics.
TK-790/(B)/H(B)
DISASSEMBLY FOR REPAIR (TK-790/(B))
1. Removing the Case and Shield Cover
1. Remove the 9 screws ( 1 ), and remove the upper and lower halves of the case. (Remove the 4 screws holding the upper half and the 5 screws holding the lower half.) 2. Remove the shield cover ( 2 ).
3. Removing the Final Unit (X57-561 C/3)
1. Remove the 2 screws ( 5 ) holding the power module to the frame. 2. With a screwdriver, remove the leaf spring ( 6 ) holding the Q2 to the frame. 3. Desolder the power module. 4. Remove the 2 screws holding the lead terminal from DC connector (2P) on the rear. 5. Remove the 8 screws ( 7 ) holding the PC board. 6. Desolder CN4 on the antenna connector.
2. Removing the TX-RX Unit (X57-561 A/3)
1. Remove the 7 screws ( 3 ), and remove the PLL shield case. 2. Remove the connector (CN201) and coaxial plugs (CN104, CN203) from the final unit, and remove the flat cable (CN202) upwards from the control unit (CN502). 3. Remove the 5 screws ( 4 ).
1
1
1
1
2
7
7
7 7 5
5 7 7 7
6 CN203 33 3 3 3 4 4 3 3 4 CN201 CN104 Final unit
44 TX-RX unit
Control unit
1 1 1 1
1
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