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JVC HRJ677MS
Service Manual


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  • Contains Circuit Diagrams
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  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of JVC HRJ677MS Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 37 (click to view)
3.4

SYSCON CIRCUIT

Note: ⢠When perform this adjustment, remove the Mechanism assembly. 3.4.1 Timer clock
Signal Mode Equipment (A) (B) (C) ⢠No signal ⢠EE ⢠Frequency counter [HR-J271MS/J471MS] ⢠IC3001 pin 29 ⢠IC3001 pin 57 ⢠C3015 + and â [HR-J677MS/J777MS] ⢠IC3001 pin 61 ⢠IC3001 pin 24 ⢠C3026 + and â

Measuring point (D1) (D2) (D3) Measuring point (D1) Short point (D2) (D3) Adjustment part (F)

----------------------------------

[HR-J271MS/J471MS] ⢠C3018 (TIMER CLOCK) [HR-J677MS/J777MS] ⢠C3025 (TIMER CLOCK) ⢠1024.008 ± 0.001 Hz (976.5549 ± 0.0010 µsec)

Specified value

(G)

[HR-J271MS/J471MS] (1) Connect the frequency counter to the measuring point (D1). (2) Connect the short wire between the short point (D2) and GND. (3) Short the leads of capacitor (D3) once in order to reset the microprocessor of the SYSCON. (4) Adjust the Adjustment part (F) so that the output frequency becomes the specified value (G). [HR-J677MS/J777MS] (1) Connect the frequency counter to the measuring point (D1). (2) Connect the short wire between the short point (D2) and Vcc (5V). (3) Short the leads of capacitor (D3) once in order to reset the microprocessor of the SYSCON. (4) Disconnect the short wire between the short point (D2) and Vcc then connect it again. (5) Adjust the Adjustment part (F) so that the output frequency becomes the specified value (G).

3-3

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