E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
Front Panel
3-8
Front Panel
Tools Required
• T–10 driver
• T–15 driver
• needle–nose pliers
Removal Procedure
NOTE To remove the Front Panel on signal generators with Option 1EM, complete steps 1 through 6 and steps 20
through 23.
Refer to Figure 3- 3 for instruments with serial number prefix < US/MY5XXX3XXX for this procedure.
Refer to Figure 3- 4 for instruments with serial number prefix > US/MY5XXX3XXX for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Instrument Cover” on page 3- 4 and “Inner
Instrument Cover” on page 3- 6.
3. Using the T–10 driver, remove the four screws from the Baseband Generator cover.
4. Remove the side trims that cover the six screws.
5. Using the T–15 driver, remove the six screws (1) from the sides of the frame.
6. Using the T–10 driver, remove one screw on the top (2) and bottom (3) frame.
CAUTION Before removing the front panel from the signal generator, lift and support the front of the signal
generator’s frame.
7. Slide the front panel over the RF output connector (non–1EM signal generators only).
8. Using the needle–nose pliers, disconnect the following flexible cables:
• W1 (EXT 1 INPUT) from the A11 Pulse/Analog Modulation Generator J401 (non–1EM signal generators only).
• W2 (EXT 2 INPUT) from the A11 Pulse/Analog Modulation Generator J402 (non–1EM signal generators only).
• W3 (LF OUTPUT) from the A11 Pulse/Analog Modulation Generator J403 (non–1EM signal generators only).
• W4 ALC INPUT) from the A10 ALC J4 (non–1EM signal generators only).
• W5 (PULSE/TRIGGER GATE INPUT) from the A11 Pulse/Analog Modulation Generator J201 (non–1EM signal
generators only).
• W6 (PULSE VIDEO OUTPUT) from the A11 Pulse/Analog Modulation Generator J203
(non–1EM signal generators only).
• W7 (PULSE SYNC OUTPUT) from the A11J202 (non–1EM signal generators only).
• W49 (I IN) from the A35J7 (E8267D only).
• W50 (Q IN) from the A35J8 (E8267D non–1EM signal generators only).
• W51 (DATA) from the A31J500 (E8267D non–1EM signal generators only).
• W52 (DATA CLOCK) from the A31J501 (E8267D non–1EM signal generators only).
• W53 (SYMBOL SYNC) from the A31J502 (E8267D non–1EM signal generators only).
9. Disconnect the A1W1 display cable from the A31 Motherboard P13.
10. For serial number prefix < US/MY5XXX3XXX, disconnect the A4W1 inverter cable from the A31 Motherboard P12
(refer to Figure 3- 3).
And for serial number prefix > US/MY5XXX3XXX, disconnect the A2W1 display cable from the A31 Motherboard
P12. (refer to Figure 3- 4).
11. Disconnect the W9 ribbon cable from the A31 Motherboard P11.
12. Remove the front panel.
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