It was magic after so many years to still be able to source this info. It was equally amazing to return my Pioneer receiver to it near new sound quality AFTER NEARLY 30 YEARS! Thank you for this ability!
The manual is an excellent reproduction with complete schematics, made troubleshooting and repair a simple process.
Text excerpt from page 5 (click to view)
SECTION 3 ELECTRICAL ADJUSTMENT (VHS)
3.1 Syscon circuit Note: â¢ When perform this adjustment, remove the Mechanism assembly. 3.1.1 Timer clock
Signal Mode Equipment (A) (B) (C)
Measuring point (D1) Short point (D2) (D3) Adjustment part (F) Specified value (G)
â¢ No signal â¢ EE â¢ Frequency counter â¢ IC3001 pin 61 â¢ IC3001 pin 24 â¢ C3026 + and â â¢ C3025 (TIMER CLOCK) â¢ 1024.008 Â± 0.001 Hz
(976.5549 Â± 0.0010 Âµsec)
(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).