HP HP-97 - III. Assembly-Level Maintenance; Introduction

SECTION
IIT
Assembly-Level Maintenance
3-1. INTRODUCTION
3-2. This section includes procedures for:
a. Isolating any calculator malfunction to a replaceable assembly.
b. Disassembling the calculator to permit the faulty assembly to be
replaced.
c. Replacing either the faulty assembly or certain associated components
that can be replaced without desoldering.
3-3. The HP-97 Assembly-Level Troubleshooting Procedure (table 3-8)
lists the step-by-step procedures for isolating a malfunction to a
replaceable assembly. Refer to the HP-97 Exploded View (figure 6-1)
and the HP-97 Assembly Removal and Replacement Procedures (paragraph
3-28) for aid in replacing the faulty assembly. (CAUTION: Be sure that
the bench setup for trouble analysis has adequate electrostatic protection;
otherwise, IC's may be damaged).
3-4., If a calculator is received with a complaint regarding only a
particular inoperable function, refer to the individual key sequence tests
(table 3-1) for verifying and correcting the malfunction.
3-5. After known malfunctions have been corrected and the calculator
reassembled, perform the full operational test (paragraph 3-9) to ensure
that all capabilities of the calculator are functioning correctly.