Watches — Pinpoint Tests

A1: CHECK CIRCUIT VOLTAGE 29-GB6 (ORANGE/YELLOW)

1 Enter the OFF position.

2 Disconnect Clock C460.

3 Using a digital multimeter, measure the voltage between pin 6 of C460 clock circuit 29-GB6 (orange/yellow), from the wiring side and "weight".

• Is the voltage over 10 V?

→ Yes

Go to A2 Go to PINPOINT TEST A

→ No

REPAIR circuit 29-GB6 (orange/yellow), CHECK the system is working properly.

A2: CHECK CIRCUIT VOLTAGE 15-GB6 (GREEN/YELLOW)

1 Drive the ON position.

2 Using a digital multimeter, measure the voltage between pin 1 of C460, circuit 15-GB6 (green/yellow), from the wiring side and "weight".

• Is the voltage over 10 V?

→ Yes

Go to A3 Go to PINPOINT TEST A

→ No

CHECK fuse 59 (7.5 A). If the fuse is blown, INSTALL a new fuse. CHECK the system is working properly, If the fuse fails again, CHECK for a short to "mass". If the fuse is good, REPAIR circuit 15-GB6 (green/yellow). CHECK the system is working properly.

A3: INSPECT ELECTRICAL CIRCUIT 91-GB6 (BLACK/YELLOW) BREAK

1 Enter the OFF position.

2 Using a digital multimeter, measure the resistance between pin 2 of C460, circuit 91-GB6 (black/yellow), from the wiring side and "weight".

• Is the resistance less than 5 ohms?

→ Yes

INSTALL a new clock. CHECK the system is working properly.

→ No

REPAIR circuit 91-GB6 (black/yellow). CHECK the system is working properly.