HP-97 Printer Malfunction

[Jonas Sandstedt]

I can advance paper manually by moving the gears at the motor, the printer head then moves and rotates the paper feed mechanism; I assume that this indicates that the gears are fine - but I might of course be wrong. Please let me know what gear errors I might check for in view of the above. I have not owned a hp-97 before, so this is new for me, only having reparied TI-59 calculators Before.