GRAFLEX - Graflex Strob 500 Service

Complete service manual for the Graflex STROB 500 and GLOBE STROB 500 electronic flash units. This technical reference covers three distinct power configurations—RG (rechargeable high-voltage battery), AC (alternating current), and HV (high-voltage dry battery)—with full service instructions and repair procedures for technicians and experienced users. The manual explains fundamental operating principles of the power pack, capacitor pack, and lamphead assembly, establishing the foundation needed to understand and troubleshoot the unit. Performance specifications are documented for each model variant, including power output in watt-seconds, recycle times, guide numbers at ASA 25 and 100, flash count per charge, and color temperature. The troubleshooting guide methodically addresses common failures in the lamphead, RG power pack, HV battery pack, and capacitor pack, tracing each malfunction to probable causes with specific corrective procedures. Detailed electrical schematics cover all three power pack configurations, capacitor pack circuits, and lamphead control boards. Exploded-view diagrams illustrate the complete flash assembly, circuit board assembly, lamp housing assembly, and power supply components, making disassembly and part identification straightforward. A comprehensive parts list catalogs every replacement component required for service and maintenance operations. Essential for workshop repair of this classic studio flash system.